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381 - Electrical audio signal processing systems and devices

381104000 - INCLUDING AMPLITUDE OR VOLUME CONTROL

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Class / Patent application numberDescriptionNumber of patent applications / Date published
381108000 Including feedback 2
20100150379Multiband audio dynamics processor - An audio system includes an automatic level controller receiving at least one input audio signal from at least one audio medium. The automatic level controller includes a gain adjust module for producing an output audio signal based on the at least one input audio signal. A difference between a maximum sound level and a minimum sound level of the at least one input audio signal is greater than a difference between a maximum sound level and a minimum sound level of the output audio signal. A filter arrangement is communicatively coupled to the automatic level controller. The filter arrangement receives the output audio signal and divides the output signal into a plurality of filtered signals. Each of the filtered signals corresponds to a respective frequency band. A multiband dynamics controller is communicatively coupled to the filter arrangement. The multiband dynamics controller receives the filtered signals and applies a different respective gain characteristic to each of the filtered signals to thereby produce a plurality of gain adjust signals. The gain adjust signals are combined into a multiband dynamics controller output signal.06-17-2010
20110222711CONTROLLING GAIN DURING MULTIPATH MULTI-RATE AUDIO PROCESSING - Methods and systems for processing audio signals are disclosed herein. Aspects of the method may comprise controlling gain during multipath, multi-rate audio processing by generating a digital signal that is a product of an input digital signal and a gain coefficient derived from a lookup table, and coarse tuning the gain by bit-shifting the digital signal to generate a digital output signal. The gain may be fine-tuned utilizing a variable step size determined by interpolation. The gain coefficient may be partitioned into gain blocks, which may be twice a corresponding value in preceding gain blocks. The gain blocks may be partitioned into steps that represent particular gain values within a range associated with the gain block. The digital output signal may be ramped utilizing a linear interpolation of the gain coefficients over a number of samples of the input signal, where the number of samples is given as a power of two.09-15-2011
Entries
DocumentTitleDate
20130028445METHOD FOR PROCESSING AUDIO SIGNAL AND AUDIO SIGNAL OUTPUT APPARATUS ADOPTING THE SAME - An audio signal output apparatus and a method for processing an audio signal thereof are provided. the audio signal output apparatus including: an amplification unit receiving and amplifying which receives and amplifies an audio signal; a plurality of comparison units repeatedly comparing which performs comparisons of input levels of the audio signal using with different threshold values; and a control unit controlling which controls an output of the audio signal through by changing of gains a gain of the amplification unit units in accordance with the results of comparison the comparisons performed by the plurality of comparison units.01-31-2013
20130028444AUDIO DEVICE WITH VOLUME ADJUSTING FUNCTION AND VOLUME ADJUSTING METHOD - An audio device and a volume adjusting method are provided. The audio device includes a speed sensor, a first FIFO buffer unit, and a second FIFO buffer unit. The audio device generates audio signals by playing multimedia files and stores audio signals to the first FIFO buffer unit. The audio device collects ambient sound signals and stores collected sound signals to the second FIFO buffer unit. The audio device further analyzes stored audio signals and sound signals to determine a waveform of environmental noise signals, and determines a SPL of the environmental noise signals according to the determined waveform. The audio device then compares the determined SPL with a preset SPL and compares the sensed speed with a preset speed if the determined SPL is greater than the preset SPL, and adjusts the volume of audio signals according to a comparison result between the sensed speed and the preset speed.01-31-2013
20120163632CHARGE PUMP CIRCUIT - A bipolar output charge pump circuit 06-28-2012
20130028443DEVICES WITH ENHANCED AUDIO - A system for enhancing audio including a computer and an output device. The computer includes a sensor configured to determine a user location relative to the computer. The sensor is also configured to gather environment data corresponding to an environment of the computer. The computer also includes a processor in communication with the sensor and configured to process the user location and the environment data and adjust at least one of an audio output or a video output. The output device is in communication with the processor and is configured to output at least one of the audio output or the video output.01-31-2013
20090196437MUTING CONTROL DEVICE, MUTING CONTROL METHOD, AND MUTING CONTROL PROGRAM - when controlling the audio signal to the mute mode from an unmute mode, first, the muting circuit switches from the non-attenuating state to the attenuating state to cause the muting circuit to attenuate the audio signal by the predetermined amount of attenuation, and then, the amount of attenuation by the volume control section is set to the maximum amount of attenuation to cause the volume control section to attenuate the audio signal by the maximum amount of attenuation.08-06-2009
20100080403Post phase-inverter volume control - A post phase-inverter master volume regulator for use in combination with a tube-type musical amplifier having a phase-inverter tube. The signals at both sides of the phase-inverter tube's DC voltage plate are extracted from the amplifier for processing by the master volume regulator. In one embodiment, such signals are extracted by inserting a male/female tube base between the amplifier's phase-inverter tube and its socket. The two voltage plate signals are then transmitted through a multiconductor umbilical to an exterior enclosure. Each signal is connected to ground through its respective user adjustable rheostat, permitting the user to simultaneously change the inverter-tube's two voltage signals (and vary the amplifier's volume). The regulator may also include circuitry adapted to provide a bass-boost, and/or a high frequency cutoff. Sometimes, first and second volume controls may be provided to permit a user to quickly change between two volume settings. In another embodiment, a dual-ganged pot, for controlling the volume, would be mounted directly in the tube base, thereby eliminating the need for an umbilical and an exterior enclosure.04-01-2010
20100074456SYSTEM FOR ADJUSTING PLAYING VOLUME ACCORDING TO PREDETERMINED TIME AND METHOD FOR THE SAME - A system for adjusting playing volume according to a predetermined time and a method for the same are provided. The system includes a time data unit, a volume adjustment database, a volume control unit, and an audio frequency module. The time data unit generates a current time data. The volume adjustment database is built-in and configured to store an audio variation data. The audio frequency module receives and outputs an audio frequency signal. By reference to the current time data and the audio variation data, the volume control unit adjusts variation of the audio frequency signal outputted in real time, thereby enchanting audience and enhancing delivery of advertisement messages.03-25-2010
20130039513ELECTRONIC DEVICE AND METHOD FOR ADJUSTING VOLUME - The disclosure provides an electronic device and a method for adjusting volume adapted for the device. The electronic device defines at least two work modes. The method includes steps: determining whether one of the at least two work modes is selected; detecting a pulse frequency of a user in real time when one of the at least two work modes is selected; determining whether the pulse frequency is less than a reference value; and if the pulse frequency is less than the reference value, adjusting a volume according the selected work mode.02-14-2013
20130039514METHOD AND APPARATUS FOR SUPPLEMENTING LOW FREQUENCY SOUND IN A DISTRIBUTED LOUDSPEAKER ARRANGEMENT - An audio communication system is provided for generating an audio output for users in a region, the system comprising a plurality of portable communications devices for use by a respective plurality of users, each communications device comprising a microphone for inputting an audio signal by a user, a loudspeaker for generating an audio output for said user, said loudspeaker being adapted to output said audio output in at least a first frequency band, and a wireless interface for wireless communication to transmit said audio signals from said microphone and receive audio signals derived from an audio source for generating said audio output by said loudspeaker; and at least one low frequency loudspeaker device having an interface for receiving audio signals derived from a microphone of another communications device, and a low frequency loudspeaker adapted to output a low frequency audio output in said region only in a second frequency band lower than said first frequency band.02-14-2013
20130034246DIFFRACTED SOUND REDUCTION DEVICE, DIFFRACTED SOUND REDUCTION METHOD, AND FILTER COEFFICIENT DETERMINATION METHOD - A diffracted sound reduction device includes: a reproduction speaker that outputs reproduced sound having properties indicated by an input signal; control speakers each of which reproduces corresponding one of control signals, the diffracted sound being a part of the reproduced sound and arriving at corresponding one of the control points except the control point at the listener's position; and control filters each of which filters the input signal to generate corresponding one of the control signals. Each of the control points faces a corresponding speaker from among the reproduction speaker and the control speakers. Each of the control filters generates the corresponding one of the control signals so that a sound pressure of the diffracted sound at corresponding one of the control points is lower than a sound pressure of direct sound that is a part of the reproduced sound which arrives at the control point of the listener's position.02-07-2013
20130077803SOUND REPRODUCING DEVICE - A sound reproducing device includes parametric speakers disposed to a display, a loudspeaker, drivers, a human-body sensor, and a controller. The loudspeaker has a wider directivity than the parametric speakers. The drivers change directions of the parametric speakers, respectively. The parametric speakers and the drivers constitute at least two parametric speaker units each composed of respective one of the parametric speakers and respective one of the drivers. The controller reproduces sound information based the number of persons in front of the display detected from an output from the human-body senor. The sound reproducing device reduces the possibility for a number of persons to hear the sound noisily, and allows drawing more attention to the content, e.g. an advertisement.03-28-2013
20130136277VOLUME CONTROLLER, VOLUME CONTROL METHOD AND ELECTRONIC DEVICE - According to at least one embodiment, a volume controller includes an audio processor configured to generate an output signal by variably controlling an amplitude of an input signal; and a volume controller configured to set a sound volume for the variable control based on the input signal.05-30-2013
20130094668PROXIMITY SENSING FOR USER DETECTION AND AUTOMATIC VOLUME REGULATION WITH SENSOR INTERRUPTION OVERRIDE - A mobile device includes at least one speaker and an audio subsystem for providing an audio signal to the at least one speaker for playback by the at least one speaker. The audio subsystem operates by detecting a distance to a user of the mobile device using a proximity sensor and controlling volume output of the at least one speaker based on the distance to the user of the mobile device and the operational status of the proximity sensor. If it is determined that the proximity sensor is functional, the audio subsystem applies a gain factor to the audio signal that varies based on the distance to the user or limits the maximum allowable speaker output based on the distance. A high or low gain setting may be applied for when the user is far away or in close proximity to the mobile device.04-18-2013
20130058501VOLUME CONTROL APPARATUS - When the instruction for increasing the volume level is input by the user's operation and the signal representing the set value or more is output from a detector, a controller does not increase the volume levels of the first volume controller and the second volume controller. When the signal representing the set value or more is not output from the detector and the second volume level has a predetermined value, the controller increases the first volume level. When the signal representing the set value or more is not output from the detector and the second volume level is less than the predetermined value, the controller increases the second volume level.03-07-2013
20130058503AUDIO PROCESSING APPARATUS, AUDIO PROCESSING METHOD, AND AUDIO OUTPUT APPARATUS - An audio processing apparatus includes a user detection unit that detects the presence or absence of a user; a user information obtaining unit that obtains user information about a user that is detected by the user detection unit; and an audio processing unit that performs a process for accentuating predetermined audio contained in input audio on the basis of the user information.03-07-2013
20130058502APPARATUS FOR PROCESSING AN AUDIO SIGNAL AND METHOD THEREOF - An apparatus for processing an audio signal and method thereof are disclosed. The present invention includes receiving a downmix signal and side information; extracting control restriction information from the side information; receiving control information for controlling gain or panning at least one object signal; generating at least one of first multi-channel information and first downmix processing information based on the control information and object information, without using the control restriction information; and, generating an output signal by applying the at least one of the first multichannel information and the first downmix processing information to the downmix signal, wherein the control restriction information relates to a parameter indicating limiting degree of the control information.03-07-2013
20110013785APPARATUS AND METHOD FOR CONTROLLING A PORTABLE TERMINAL - A method for controlling a portable terminal includes confirming whether volume of sound input to microphones is a predetermined level or greater, confirming whether sound having volume of the predetermined level or greater has been input for a predetermined time period or more, confirming whether a pair of microphones to which sound having symmetrical volume has been input is present, among microphones to which sound having volume of the predetermined level or greater has been input for the predetermined time or more, and if so, confirming that scroll input by a user has been performed in an arrangement direction of the pair of microphones.01-20-2011
20110013784DEVICE AND METHOD FOR COMPENSATING SUPPLY VOLTAGE FROM POWER SUPPLY AND ELECTRONIC APPARATUS - A device is used for compensating a supply voltage from a power supply, the supply voltage powers an audio device. The device includes a detecting circuit and a storing circuit. The detecting circuit is used for detecting an audio signal from the audio device, generating a first level signal when detecting that the audio signal has a first characteristic, and generating a second level signal when detecting that the audio signal has a second characteristic. The storing circuit is used for storing energy according to the first level signal, and releasing energy to increase the supply voltage according to the second level signal. A related method and electronic apparatus are also provided.01-20-2011
20120224721Multiband Audio Dynamics Processor - An audio system includes a level controller receiving an input audio signal from an audio medium. The level controller includes a gain adjust module producing an output audio signal based on the input audio signal. A filter arrangement is communicatively coupled to the level controller. The filter arrangement receives the output audio signal and divides the output signal into a plurality of filtered signals. Each of the filtered signals corresponds to a respective frequency band. A multiband dynamics controller is communicatively coupled to the filter arrangement. The multiband dynamics controller receives the filtered signals and applies a respective gain characteristic to each of the filtered signals to thereby produce a plurality of gain adjust signals. The gain adjust signals are combined into a multiband dynamics controller output signal.09-06-2012
20120224720SOUND VOLUME CONTROL DEVICE, SOUND VOLUME CONTROL METHOD, AND SOUND VOLUME CONTROL PROGRAM - A sound volume control device includes a sound input section, a band dividing section, an excessive output notification section, a correction band decision section and a sound output control section. The sound input section converts input sound into a sound signal. The band dividing section carries out band-division with respect to the sound signal. The excessive output notification section outputs excessive output notification information when output sound from the present device is excessive. The correction band decision section calculates audible signal distribution information when the excessive output notification information is not output and excessive signal distribution information when the excessive output notification information is output, for each band in the sound signal, and decides a correction band according to the audible signal distribution information and excessive signal distribution information. The sound output control section controls sound volume of sound signal for the correction band to provide output sound.09-06-2012
20130064396INFORMATION PROCESSING APPARATUS AND INFORMATION PROCESSING METHOD - An information processing apparatus including an audio input unit, an amplifier unit, and a controller. The audio input unit is capable of converting audio into an electric audio signal. The amplifier unit is configured to amplify the audio signal obtained by the audio input unit and capable of performing auto gain control. The controller is configured to turn off the auto gain control of the amplifier unit when an application that uses an audio recognition is executed with respect to the amplified audio signal.03-14-2013
20130064394DIGITAL SIGNAL GENERATOR AND DIGITAL MICROPHONE - According to one embodiment, a digital signal generator includes an amplifying unit, a reference voltage generator and a modulator. The amplifying unit amplifies an analog input signal having a signal level linearly depending on a temperature. The reference voltage generator generates a reference voltage linearly depending on the temperature. The modulator converts the analog input signal amplified by the amplifying unit into a digital output signal based on the reference voltage.03-14-2013
20130064395AUDIO AMPLIFIER CIRCUIT AND METHOD THEREOF - An audio amplifier circuit and a method of the same are provided. The audio amplifier circuit includes a processor, a pre-processing module, and a post-processing module. The processor controls a pre-gain value of the pre-processing module and a post-gain value of the post-processing module in accordance with a volume adjustment signal so as to process an audio input signal and generate an audio output signal. The pre-gain value and the post-gain value are dynamically adjusted by the audio amplifier circuit and a method thereof by according to the volume adjustment signal so as to generate low distortion, low noise audio output signals and improve audio playback quality of an audio output device.03-14-2013
20090252347Method and Apparatus For Automatic Gain Control - A method and apparatus for Automatic Gain Control (AGC) that provides an output signal having a smooth gain variation for any input signal. The various embodiments assure that the output signal will reach a required output level in a specified attack or decay period. A curvilinear reference gain characteristic is applied to the gain variations. One example uses an exponential curve and sets an initial and final value of the gain law for both attack and decay periods as presets. The various embodiments further compute intermediate gain values of the curvilinear paths that archives the smooth variations is also proposed. Other possible curvilinear characteristics may be used such as, but not limited to, logarithmic, hyperbolic, sinusoidal, etc. that are expressible as exponentials. Intermediate gain values may be determined either by table lookup or by on the fly computation of the curvilinear characteristic.10-08-2009
20120114144SOUND CONTROL DEVICE, COMPUTER-READABLE RECORDING MEDIUM, AND SOUND CONTROL METHOD - Sound is outputted, without giving the sense of incongruity to the user, even if reproduction of animation is stopped by the user. An animation acquiring section 05-10-2012
20100272290LOUDNESS CONSISTENCY AT PROGRAM BOUNDARIES - Improving loudness consistency of an audio stream may include delaying an encoded audio stream and adjusting the delayed encoded audio stream based at least in part on the loudness of the audio stream before a transition and the loudness of the audio stream after the transition. Improving loudness consistency of an audio stream may further include determining the loudness of the audio stream before the transition, detecting the transition, storing the loudness of the audio stream before the transition, and determining the loudness of the audio stream after the transition.10-28-2010
20090232330Apparatus and method for automatic gain control using phase information - An apparatus and a method for automatically controlling a gain using phase information are provided. The apparatus includes a frequency conversion unit converting each of input signals received from a plurality of acoustic input apparatuses to frequency input signals, a factor determination unit determining a scaling factor according to a gain difference between the input signals based on a phase difference of the frequency input signals, and a scaling performance unit performing scaling for gain compensation between the input signals based on the scaling factor.09-17-2009
20100128903A METHOD AND AN APPARATUS FOR DAMPING A SONIC SIGNAL - A method for limiting the sound volume in an earphone, a headset (05-27-2010
20100166224LOUDNESS CIRCUIT WITHOUT OPERATIONAL AMPLIFIER - A loudness circuit without operational amplifiers is provided. The loudness circuit includes a first equivalent resistance circuit for accepting an audio signal; a second equivalent resistance circuit connected to the first equivalent resistance circuit; and a series resistor and capacitor, parallel connected with the second equivalent resistance circuit for determining zeros of the loudness circuit; wherein the first and the second equivalent resistance circuit, the resistor and the capacitor regulates the output gain of the loudness circuit in all frequency bands such that the gain is raised in a predetermined low-frequency band and reduced in a predetermined high-frequency band, and a loudness signal is output from the second equivalent resistance circuit such that zeros of the loudness circuit are fixed.07-01-2010
20120189139Semiconductor Integrated Circuit Having a Switched Charge Pump Unit and Operating Method Thereof - Power source noises of a digital amplifier arising from regenerative current of an inductor of a low pass filter is reduced. A semiconductor integrated circuit includes: a digital amplifier, a driver; and a charge pump unit which is supplied with a positive operating voltage and generates a positive power supply voltage and a negative power supply voltage. An output terminal of the digital amplifier is coupled to a low pass filter including an inductor and a filter capacitor. The charge pump unit includes a first switch through a sixth switch, and a first capacitor through a fourth capacitor, all connected via a first node through a sixth node. Regenerative current which flows between the filter capacitor and the positive power supply voltage or the negative power supply voltage is absorbed by the second capacitor, by controlling the sixth switch to an on state.07-26-2012
20090208034AUDIO SIGNAL PROCESSING CIRCUIT - Plural variable gain amplifiers amplify audio signals of plural channels for each channel. An interface receives, from outside, plural gain control data individually designating gain of each channel. Plural gain controllers respectively switch the gain of the plural variable gain amplifiers, based on the plural gain control data. The plural gain controllers arrange timing to change gain of a variable gain amplifier corresponding to gain control data received in a predetermined data entry period, among the plural gain control data that are inputted at different timing.08-20-2009
20120288120POWER SUPPLY WITH RECTIFIER PROTECTION - An apparatus for driving speakers includes user-configurable amplifier cells for driving selected speakers, a synchronous rectifier circuit, and a control system. Each cell connects between power rails. The rectifier circuit provides current on the rails for consumption by the cells. The current depends on the configuration. The control system implements a model of the rectifier circuit and cells and uses it to control an audio input signal in response to information concerning electrical outputs of the amplifier cells. This indirectly limits current drawn from the synchronous rectifier circuit.11-15-2012
20110299705AUDIO SIGNAL ADJUSTING SYSTEM AND METHOD - An audio signal adjusting method is disclosed, which comprises steps of: determining an environment noise level; calculating a ratio between an environment noise level and an output audio signal level to form a measuring value; comparing the measuring value with a predetermined threshold as an audio comfort value; and determining whether or not to adjust an audio signal parameter according to the comparison result. If the comparison result is incorrect, then the audio signal parameter is adjusted, and the output audio signal should be outputted according to the adjusted audio signal parameter. The audio signal adjusting method can satisfy the different user needs on different environment types.12-08-2011
20100040245MULTI-FUNCTION HEADSET AND FUNCTION SELECTION OF SAME - A multi-function headset is disclosed. The multi-function headset includes an ear shell attached to one end of a holding means the ear shell comprising a speaker unit through which audio stimulus is provided to a user, a microphone attached on a first end of a boom assembly and engaging an engagement switch on a second end of said boom assembly with the ear shell, the engagement switch position selecting an application of the head set. In another aspect of the invention, the ear shell further comprises a first switch engaging the boom assembly when the boom assembly is in a retracted position. In another embodiment of the invention, a headset including an ear shell attached to one end of a holding means is disclosed. The ear shell comprising a speaker unit through which audio stimulus is provided to a user, and means for adjusting a volume through the speaker unit wherein the means is selected from the group consisting of: pressure determining sensors and switches.02-18-2010
20110268294PROVIDING ATHLETIC TRAINING INFORMATION - An audible playback device that allows an athlete, such as a runner, to conveniently listen to audible content and receive athletic performance information. A device may be employed to both playback audible content and provide monitored performance information to a user. The performance information may be provided to a user audibly, so that the user does not need to move the monitoring device's user interface to a viewable position, or visually. For example, if the user does not wish to interrupt the audible content, the user may elect to view athletic information visually on a display.11-03-2011
20090190779METHOD AND APPARATUS TO AUTOMATICALLY CONTROL AUDIO VOLUME - A method includes comparing a magnitude value of an audio signal in a fixed unit section with a target volume level, measuring audio gain in each fixed unit section using specific functions which are each determined to be different according to a ratio of the target volume level to the audio signal magnitude, and providing the measured audio gain to the audio signal in the fixed unit section.07-30-2009
20090316933Miniature Speaker Device and Television Set - A miniature speaker device includes a housing, a speaker mounted on the housing, a passive radiator mounted on the housing and vibrating in resonance with vibration of the speaker and having no driving system and a low frequency range amplification circuit for amplifying sound pressure in frequency components of a low frequency range of a single audio signal input in the speaker.12-24-2009
20090086997SYSTEM AND METHOD FOR INCREASING RING TONE VOLUME - A method for increasing ring tone volume is provided. The method includes steps of: reading an audio file which is set as a current ring tone; determining whether the ring tone is a MP3 audio file or a musical instrument digital interface (MIDI) audio file; adjusting frequencies by using an equalizer technique to increase volume of the ring tone if the ring tone is the MP3 audio file; adjusting a volume level of the ring tone to be the highest volume level, and adjusting timbre of the ring tone to increase the ring tone volume by simulating a musical score of the ring tone by using different instruments if the ring tone is the MIDI audio file. A related system is also provided.04-02-2009
20100080402System and Method for Volume Control Based on Location - A system and method control a volume based on location. The system comprises a switch and an asset. The switch is for a network including an operating area for a region. The region is divided into a plurality of zones. The asset is disposed in one of the zones. The asset includes an audio output device. The audio output device is set to a predetermined volume level as a function of one of the plurality of the zones in which the asset is disposed.04-01-2010
20090046873METHODS AND SYSTEMS FOR DETERMINING AUDIO LOUDNESS LEVELS IN PROGRAMMING - An example of a method of correcting an audio level of a stored program asset comprises retrieving a stored program asset having audio encoded at a first loudness setting. Dialog of the audio of the asset is identified, a loudness of the dialog is determined and the determined loudness is compared to the first loudness setting. The asset is re-encoded at a second loudness setting corresponding to the determined loudness, if the first loudness setting and the second loudness are different by more than a predetermined amount. The determined loudness is preferably a DIALNORM of the dialog. The asset may be stored with the re-encoded loudness setting. The method may be applied to programs as they are being received from a source, as well. Aspects of the method may also be applied to programs to be provided by a source. Systems are also disclosed.02-19-2009
20090161889DYNAMIC RANGE CONTROLLER - A circuit for preventing clipping in an Automatic Level Control (ALC) or Limiter, where the amplitude of the signal above the clipping point is estimated, then the signal level is automatically reduced over a defined period substantially equal to the feedforward delay in the ALC/Limiter. By adaptively controlling, based on the excess amplitude and the delay time available, an attack rate used in the ALC/Limiter to reduce the gain applied to an input signal, it can be ensured that the output amplitude is brought within the clipping level sufficiently quickly to prevent audible clipping.06-25-2009
20090262955ELECTRONIC DEVICE AND VOLUME CONTROL METHOD OF ELECTRONIC DEVICE - A problem of the invention is to provide an electronic device and a volume control method of the electronic device capable of automatically controlling the volume when TV broadcast viewing is started or when headphones are attached/removed. To view a broadcast received in a TV broadcast data reception section (10-22-2009
20100128904DYNAMIC VOLUME CONTROL AND MULTI-SPATIAL PROCESSING PROTECTION - A disclosed system and method dynamically controls the perceived volume of a stereo audio program including left and right channel signals. The system comprises: a dynamic volume control configured and arranged so as to maintain a perceived constant volume level of the stereo audio program; and an excessive spatial processing protection processor configured and arranged for controlling the level of a difference signal, created as a function of the right channel signal subtracted from the left channel signal (L−R), relative to the level of a sum signal, created as a function of the right channel signal plus the left channel signal;; wherein the excessive spatial processing protection processor processes the audio signals so as to control the difference (L−R) signal relative to the sum (L+R) signal. A system and method are also provided for dynamically controlling the perceived volume of a stereo audio program including left and right channel signals, comprising: a dynamic volume control configured and arranged so as to maintain a perceived constant volume level of the stereo audio program; and a program change detector configured and arranged to provide a program change signal indicating that the volume of the left and right channel signals has dropped below a threshold level for at least a threshold time period so as to anticipate a possible change in the sound level of the left and right channel signals; wherein the dynamic volume control is responsive to the program change signal.05-27-2010
20090274322Volume Control Apparatus and Method - A volume control apparatus and method is provided. The volume control apparatus includes an automatic gain controller and an equal loudness controller. The method includes steps of receiving an original sound signal by the automatic gain controller, adjusting the original sound signal by the automatic gain controller according to a target volume to output an auto-gain sound signal that gradually converges to the target volume, and rendering a loudness curve according to the target volume for compensating the auto-gain sound signal to output a compensated sound signal.11-05-2009
20110170713AMPLIFICATION APPARATUS - An amplification apparatus comprises: an amplifier circuit that amplifies an input audio signal and outputs an output audio signal; a first signal level determining unit that determines whether or not a signal level of the output audio signal outputted from the amplifier circuit is lower than a silence determination reference value; and a power-supply control unit that shifts the amplification apparatus from a power-on state to a power-off state, when it is determined that the signal level of the output audio signal outputted from the amplifier circuit is lower than the silence determination reference value.07-14-2011
20090103752DEVICE AND METHOD FOR AUTOMATICALLY ADJUSTING GAIN - A device and method are provided for automatically adjusting gain, including a conversion module for converting an audio time-domain signal to an audio frequency-domain signal, an analysis module for analyzing the audio frequency-domain signal in accordance with an equal-loudness level contour of human hearing so as to generate strength weightings and generating a signal strength in accordance with the weightings, a calculation module for calculating a gain by analysis of the audio frequency-domain signal when the signal strength falls outside a default range, and a control module for generating an audio output signal in accordance with the gain and the audio time-domain signal.04-23-2009
20110200210INFORMATION PROCESSING DEVICE AND METHOD AND PROGRAM - An information processing device includes: an output device configured to perform notification to a user by outputting ringing sound; a sound pickup device configured to pick up surrounding sound as ambient sound; an adaptive filtering process device configured to perform an adaptive filtering process using the picked-up ambient sound and the ringing sound output from the output device, to thereby extract, from the ambient sound, estimated environmental sound from which the ringing sound picked up by the sound pickup device has been removed; and a control device configured to control, on the basis of the feature quantity of a predetermined feature extracted from the estimated environmental sound, the adjustment of at least one of the sound volume and the sound quality of the ringing sound.08-18-2011
20090097676Calculating and adjusting the perceived loudness and/or the perceived spectral balance of an audio signal - Audio signal processing relating to the measurement and control of the perceived sound loudness and/or the perceived spectral balance of an audio signal is useful, for example, in one or more of: loudness-compensating volume control, automatic gain control, dynamic range control (including, for example, limiters, compressors, expanders, etc.), dynamic equalization, and compensating for background noise interference in an audio playback environment. In various embodiments, modification parameters are derived for modifying the audio signal in order to reduce the difference between its specific loudness and a target specific loudness.04-16-2009
20080273719Method and apparatus for controlling audio volume when switching electronic product channels - Method and apparatus for controlling audio volume when switching electronic product channels is characterized by saving predetermined volume of each channel in a memory and outputting the responsive volume via a speaker, wherein the electronic product can output an audio volume in response to each channel as user preferable volume.11-06-2008
20100142729SOUND VOLUME CORRECTING DEVICE, SOUND VOLUME CORRECTING METHOD, SOUND VOLUME CORRECTING PROGRAM AND ELECTRONIC APPARATUS - A sound volume correcting device includes: a first component gain control unit configured to control a gain of a main first component signal, which contains a part of a plurality of audio components as a main component, out of input audio signals including the plurality of audio components and outputting the main first component signal; a first component gain control signal generator configured to generate a first component gain control signal for allowing the first component gain control unit to control the gain of the main first component signal in a first gain control way; and an other component output unit configured to output other audio components other than the first component of the input audio signals in a second gain control way different from the first gain control way.06-10-2010
20110222710METHOD AND APPARATUS FOR AUTOMATICALLY REDUCING A VOLUME LEVEL OF AN AUDIO SIGNAL PROVIDED TO A USER - The present invention provides a method of automatically reducing a volume level of an audio signal provided to a user. An audio signal is received, the audio signal is provided to the and a current hearing threshold for the user based on one or more psychophysical or electrophysiological responses of the user to the audio signal provided to the user is determined. A temporary threshold shift (TTS) based on the current hearing threshold is determined. If the TTS is above the specified TTS, the volume level of the audio signal provided to the user is automatically reduced.09-15-2011
20090245537AUTOMATIC IPOD VOLUME ADJUSTMENT - A program that would take the average db level of a music device after a certain amount of time and record at the same time the amount of time the user has been listening to the music device. The program would then automatically adjusts the volume level so that the LEQ would be at a safe level in relation to the amount of noise (music) the user has been exposed to.10-01-2009
20110142261MEMS Microphone with Programmable Sensitivity - A control circuit monitors a signal produced by a MEMS or other capacitor microphone. When a criterion is met, for example when the amplitude of the monitored signal exceeds a threshold or the monitored signal has been clipped or analysis of the monitored signal indicates clipping is imminent or likely, the control circuit automatically adjusts a bias voltage applied to the capacitor microphone, thereby adjusting sensitivity of the capacitor microphone.06-16-2011
20090245538Video/Audio Output Device and Video/Audio Method - According to one embodiment, a video/audio output method according to one embodiment includes detecting a playback volume value set in an external speaker controller for controlling an external speaker, calculating a decibel value corresponding to the detected playback volume value, generating an audio signal corresponding to the calculated decibel value, and outputting the generated audio signal to the external speaker controller, and, at the same time, outputting a video based on a video signal corresponding to the audio signal.10-01-2009
20090252348ANTENNA IMPLEMENTATIONS IN INTERCONNECTING CABLES - Antenna system having as one element a conductors in an interconnecting cable, wherein that conductor is isolated at RF from the device at the opposite cable end, while also being tightly coupled to that device at audio frequencies and/or DC. Such an antenna is suited for use in wireless transmitters and receivers for transmitting a signal from an audio playback device to a remote audio out put device having multiple conductors interconnecting the wireless transmitter and media device, or multiple conductors interconnecting the receiver and headphones/speakers.10-08-2009
20090262954AUDIO SIGNAL ADJUSTING METHOD AND DEVICE UTILIZING THE SAME - An audio signal adjusting device is disclosed. The audio signal adjusting device for adjusting the amplitudes of digital audio signals received from a decoder that decodes the audio signals received from an antenna comprises a buffer, a signal abnormality detector and a fading processor. The buffer stores the digital audio signals received from the decoder. The signal abnormality detector detects the abnormality of the digital audio signals stored in the buffer and outputs a fading out enable instruction when the digital audio signals are detected as abnormal. The fading processor fades out the amplitudes of the digital audio signals stored in the buffer according to a fading out algorithm after receiving the fading out enable instruction, to output faded digital audio signals.10-22-2009
20100014691AUTONOMOUS VOLUME CONTROL - An autonomous volume control device is described which has detectors for measuring tilt and acceleration in one or more axes. The amount of tilt and acceleration is used as an indication of the amount and type of vehicle activity, thus being used also to control the volume of the vehicle's audio system. The described volume control device requires no wiring or connections to any vehicle subsystem and the device may be mounted to the vehicle without any particular orientation being required.01-21-2010
20090316932Volume Adjustment for Multiple Voice Over Internet Protocal Streams - Systems and methods for managing the volume of multiple VoIP streams are disclosed. The system includes a VoIP server configured to receive an input audio stream from a first VoIP handset, create separate output audio streams from the input audio stream for transmission to second and third VoIP handsets, and to connect to a communications network. The system also includes a volume control table coupled to the VoIP server, the volume control table including records of volume adjustments made during prior conversations between the two or more VoIP handsets. The VoIP server is further configured create the separate output audio streams such that one or more of the output streams has a volume that is different than input audio stream based on the records.12-24-2009
20090116666ADJUSTING ACOUSTIC SPEAKER OUTPUT BASED ON AN ESTIMATED DEGREE OF SEAL OF AN EAR ABOUT A SPEAKER PORT - A degree of seal of an ear about a speaker port may be estimated by detecting touch contact between the ear and at least one touch sensor in fixed relation to the speaker port. The degree of seal is estimated based on the detected touch contact. Based upon the estimated degree of seal, the acoustic output of the speaker may be adjusted. The adjustment may compensate for perceived changes to the quality of the acoustic output resulting from the degree of seal. The at least one touch sensor may be a plurality of touch sensors spaced around the speaker port. Each sensor may have a truncated wedge shape, with a narrow end closest to the speaker port. Upon receipt of user input indicative of a high degree of ear seal, a sample of the sensor(s) may be taken and stored for using during future estimation of the degree of seal.05-07-2009
20090290726Announcement System for a Building Transport - An announcement system (11-26-2009
20090092265AUDIO DOSAGE CONTROL - A method for controlling consumer exposure to audio dosage for a composite audio signal, the method comprising: sampling the composite audio signal; transforming the sampled audio signal, using a fast fourier transform algorithm, to produce a signal representative of the amplitude of component frequencies of the audio signal; comparing the transformed audio, signal with a predefined impulse control threshold profile, representing the target maximum amplitude for each frequency component for the audio signal threshold profile to produce a configuring signal representative of the difference between the broadcast signal and the profile; using the configuring signal to automatically configure in real time a Finite Impulse Response (FIR) filter so that it attenuates the amplitude of the transformed audio signal in frequency bands centred on the frequencies at which the target threshold is exceeded; and outputting the attenuated audio signal for consumer exposure.04-09-2009
20090116667Method and Apparatus for Volume Adjustment - A method and an apparatus for adjusting volume are provided. A determining module receives a sound input signal, wherein the sound input signal is connected to a plurality of sound input sources and corresponds to one of the said sound input sources, the determining module further determines the corresponding sound input source of the sound input signal is different; a storing module stores a plurality of sound output records; a first calculating module calculates a sound output signal according to the sound input signal and the sound output records.05-07-2009
20100166225SIGNAL PROCESSING APPARATUS, SIGNAL PROCESSING METHOD AND PROGRAM - A signal processing apparatus includes a first audio adjustment information generator generating a first audio adjustment information in accordance with an audio signal in a content item, a sound input unit, a sound output unit, an audio separator separating the audio signal from noise signals which are both output from the sound output unit and are detected by the sound input unit, a second audio adjustment information generator generating a second audio adjustment information in accordance with the noise signals separated by the audio separator, and an audio adjustment unit adjusting a volume of the audio signal output in the sound output unit in accordance with the first and second audio adjustment information.07-01-2010
20110103617SOUND SOURCE RECORDING APPARATUS AND METHOD ADAPTABLE TO OPERATING ENVIRONMENT - Disclosed herein is a sound source recording apparatus and method adaptable to an operating environment, which can record a target sound source at a predetermined level without being affected by characteristics of the sound source or ambient noise. A target sound source is separated from a sound source signal received through an array of microphones and a recording sound pressure level and a gain are estimated using a reference sound pressure level and a reference distance for the target sound source, thereby controlling or adjusting the gain of the microphones.05-05-2011
20100226510SIGNAL CHARACTERISTIC ADJUSTMENT APPARATUS AND SIGNAL CHARACTERISTIC ADJUSTMENT METHOD - A coefficient calculation unit calculates a coefficient (p) according to input signals (x[n]).A balance setting unit decides, according to this coefficient (p), a coefficient used to control the level of a signal in a digital level correction unit and a coefficient used to adjust the characteristics of a signal in a characteristic correction unit, thus allowing the digital level correction unit and characteristic correction unit to execute adaptive processing09-09-2010
20120195444ELECTRONIC DEVICE AND METHOD OF DYNAMICALLY CORRECTING AUDIO OUTPUT OF AUDIO DEVICES - An electronic device and method of dynamically correcting audio output of audio devices creates a coordinate system in relation to cameras and audio devices, and obtains coordinates of each camera and each audio device. The cameras detects a user. A distance between the user and each audio devices is computed. One audio device is considered as a first audio device. A ratio of audio intensities and a difference of audio transmitting time between the first audio device and each of the other audio devices are computed. Delaying the audio output starting time of each of the other audio devices according to the differences and adjust the audio intensity of each of the other audio devices according to the ratios.08-02-2012
20100226511APPARATUS AND METHOD FOR CONTROLLING VOLUME IN PORTABLE TERMINAL - An apparatus and a method for controlling a volume in a mobile terminal are provided. The apparatus includes a motion detector and a controller. The motion detector outputs motion information from a user's movement. The controller determines the user's activity from the motion information output from the motion detector, and determines an appropriate output volume level responsive to the activity.09-09-2010
20100208918VOLUME CORRECTION DEVICE, VOLUME CORRECTION METHOD, VOLUME CORRECTION PROGRAM, AND ELECTRONIC EQUIPMENT - A volume correction device includes: a variable gain means for controlling a gain, given to an input audio signal, according to a gain control signal; a consecutive relevant sounds interval detection means for detecting a consecutive relevant sounds interval, during which a group of temporally adjoining consecutive relevant sounds is present, in the input audio signal; a mean level detection means for detecting the mean level of the input audio signal attained during the consecutive relevant sounds interval, and whose time constant for mean level detection is set to a smaller value during the leading period of the consecutive relevant sounds interval than during the remaining period; a gain control signal production means for producing the gain control signal, so that the mean level will be equal to a reference level, and feeding the gain control signal to the variable gain means.08-19-2010
20120140954ADJUSTING ACOUSTIC SPEAKER OUTPUT BASED ON AN ESTIMATED DEGREE OF SEAL OF AN EAR ABOUT A SPEAKER PORT - A degree of seal of an ear about a speaker port may be estimated by detecting touch contact between the ear and at least one touch sensor in fixed relation to the speaker port. The degree of seal is estimated based on the detected touch contact. Based upon the estimated degree of seal, the acoustic output of the speaker may be adjusted. The adjustment may compensate for perceived changes to the quality of the acoustic output resulting from the degree of seal. The at least one touch sensor may be a plurality of touch sensors spaced around the speaker port. Each sensor may have a truncated wedge shape, with a narrow end closest to the speaker port. Upon receipt of user input indicative of a high degree of ear seal, a sample of the sensor(s) may be taken and stored for using during future estimation of the degree of seal.06-07-2012
20090290727HYBRID DIGITAL/ANALOG LOUDNESS-COMPENSATING VOLUME CONTROL - A loudness-compensating volume control method imposes a desired loudness scaling on an audio signal by processing the audio signal in both the digital and analog domains by receiving a desired loudness scaling, deriving a wideband gain component and one or more other gain components from the desired loudness scaling, applying in the digital domain modifications to the audio signal based on the one or more other gain components to produce a partly-modified audio signal, and applying in the analog domain modifications to the partly-modified audio signal based on the wideband gain component. Additional loudness modifications other than volume control loudness modifications on the audio signal may also be imposed.11-26-2009
20120195443METHOD AND APPARATUS FOR OUTPUTTING AUDIO SIGNAL - An audio signal output apparatus including an audio signal input unit which receives an audio signal; a digital signal processor (DSP) which estimates an output power corresponding to the received audio signal, and adjusts at least one of a gain value to be applied to the received audio signal and the output power of the received audio signal according to a period for which the estimated output power exceeds a rated maximum output power and a difference between the estimated output power and the rated maximum output power; and an audio signal output unit which generates, amplifies, and outputs a pulse width modulation (PWM) signal corresponding to the received audio signal.08-02-2012
20130129116Glitch Detection and Method for Detecting a Glitch - System and method for detecting a glitch is disclosed. An embodiment comprises increasing a bias voltage of a first capacitor, sampling an input signal of a first plate of the first capacitor with a time period, mixing the input signal with the sampled input signal, and comparing the mixed signal with a reference signal.05-23-2013
20110235825MIXER - In a mixer, each input channel adjustment unit includes a main system unit that generates a main system signal, and a plurality of MIX send units that generate a plurality of MIX send signals. In each MIX send unit, a signal selection unit selects an audio signal from a plurality of audio signals being involved in the main system unit and including at least an audio signal to be inputted to a filter unit of the main system unit and an audio signal to be inputted to a main system gain adjustment unit. A linked gain setting unit of the MIX send unit applies a gain that increases or decreases in linking with the gain of the main system gain adjustment unit, to the audio signal that is selected by the signal selection unit. A linked ON/OFF unit of the MIX send unit sets ON state or OFF state of the audio signal that is selected by the signal selection unit in linking with the ON state or OFF state of a main system ON/OFF unit.09-29-2011
20090074209Audio Processing for Compressed Digital Television - A system for controlling volume comprising a perceptual loudness estimation unit for determining a perceived loudness of each of a plurality of frequency bands of a signal. A gain control unit for receiving the perceived loudness of one of the frequency bands of the signal and for adjusting a gain of the frequency band of the signal as a function of the perceived loudness of the frequency band.03-19-2009
20100310094DISPLAY DEVICE AND DRIVING METHOD THEREOF - A display device and a method of driving the display, wherein the volume of background music is controlled depending upon the color or brightness of display images, and the power consumption is reduced. The display device includes a display unit with a plurality of pixels, a signal controller, and a volume controller. The display unit displays images by selectively activating pixels from among the plurality of pixels in accordance with input video signals and input image control signals. The signal controller reads the input video signals to generate on-pixel signals having information about the ratio of a number of the active pixels compared to a total number of pixels in the plurality of pixels per each frame. The volume controller determines a range from among predetermined ratio ranges corresponding to the ratio of the number of active pixels to define a plurality of volume levels, and determine the volume level corresponding to the on-pixel signal to control the volume according to the ratio corresponding to the determined volume level.12-09-2010
20090067645ELECTRONIC VOLUME DEVICE - Amplifiers amplify input first audio signals according to volume values set beforehand. Via output terminals, the amplifiers output second audio signals to externally connected power amplifiers. A comparison unit compares the second audio signals with a reference signal. Via the detection terminals, detection signals are output externally according to the comparison results obtained by the comparison unit.03-12-2009
20110110534ADJUSTABLE VOICE OUTPUT BASED ON DEVICE STATUS - This is directed to providing voice audio output to a user of an electronic device. To allow a user to immediately recognize the status of one or more processes or components of the electronic device from voice audio output, independent of the content of the voice audio output, the electronic device can adjust the voice audio output based on the status of the device. For example, the voice audio output can be adjusted to sound more or less tired based on the battery level of the device. As another example, the pitch or speed of voice audio output can change to identify the particular network or type of network to which a device is connected. The change in voice audio output can be correlated to any suitable device status, including for example using a linear or non-linear correlation.05-12-2011
20110019839ADAPTIVE GAIN CONTROL FOR DIGITAL AUDIO SAMPLES IN A MEDIA STREAM - An adaptive gain control system and related operating method for digital audio samples is provided. The method is suitable for use with a digital media encoding system that transmits encoded media streams to a remotely-located presentation device such as a media player. The method begins by initializing the processing of a media stream. Then, the method adjusts the gain of a first set of digital audio samples in the media stream using a fast gain adaptation scheme, resulting in a first group of gain-adjusted digital audio samples having normalized volume during presentation. The method continues by adjusting the gain of a second set of digital audio samples in the media stream using a steady state gain adaptation scheme that is different than the fast gain adaptation scheme, resulting in a second group of gain-adjusted digital audio samples having normalized volume during presentation.01-27-2011
20100177912System and Method for Providing Volume Control - User volume control when switching from one external input port to another is provided. Once a user request to switch from one input port to another is received by an electronic user device, a determination may be made as to whether there is a stored user-defined default volume level that corresponds to the user requested or selected input port. If so, this previously-stored user-defined default volume level may be retrieved from memory and used to adjust the current volume setting of the electronic user device. Once the volume level has been adjusted in accordance with the user-defined default information, the user electronic device may then switch to the requested input port in accordance with the user's request.07-15-2010
20110044474System and Method for Adjusting an Audio Signal Volume Level Based on Whom is Speaking - A speech characteristic, such as a volume level of a call participant is derived; the derived speech characteristic is associated with an identifier, such as a caller ID number. The speech characteristic and identifier are stored in a call participant profile. An adjustment of volume level of an audio signal of the call participant is made based on the measured speech characteristic and the identifier in the call participant profile.02-24-2011
20110085680Apparatus for detecting the approach distance of a human body and performing different actions according to the detecting results - An apparatus for detecting the approach distance of a human body and performing different actions according to the detecting results comprises: an infrared sensing circuit for sensing the human body's movement; a short-distance infrared signal level detector, used for detecting the amplitude level of signals and comparing them with a preset reference level; a long-distance infrared signal level detector, used for detecting the amplitude level of signals and comparing them with another preset reference level; and a long-distance indication-signal time delayer, used for delaying the output of the signals from the long-distance-signal level detector. During the delayed period, a soft pre-recorded speech is sent off to greet customers and introduce merchandize when the short-distance-signal level detector detects a “short-distance” signal with larger amplitude, whereas a louder pre-recorded speech is sent off to draw the attention of customers when no “short-distance” signal is detected by the short-distance-signal level detector.04-14-2011
20130156228Sound Processing Apparatus, Sound System and Sound Processing Method - A sound processing apparatus processes a first sound signal and a second sound signal. The sound processing apparatus includes a first adjustor which adjusts a volume of the first sound signal, a second adjustor which adjusts a volume of the second sound signal, and a control unit which causes the first adjustor and the second adjustor to adjust the first sound signal gradually changed over a first gradually-change time and the second sound signal gradually changed over a second gradually-change time, wherein the second gradually-change time is shorter than and included in the first gradually-change time.06-20-2013
20130156229METHODS AND SYSTEMS FOR DETERMINING AUDIO LOUDNESS LEVELS IN PROGRAMMING - A program asset is retrieved. The program asset has audio encoded at a first loudness setting and includes metadata specifying the first loudness setting. Dialog of the audio is identified. The loudness of the dialog is determined. The determined loudness is compared to the first loudness setting. The program asset is re-recorded at a second loudness setting corresponding to the determined loudness, if the first loudness setting and the determined loudness are different by more than a predetermined amount.06-20-2013
20110085679Intelligent Selective System Mute - An approach is provided that receives a sound request from a requesting process. A selective mute setting is identified that corresponds to user enablement actions. If the selective mute setting is disabled the sound request is played at an audio output in response. However, if the selective mute setting being enabled, then steps are performed to determine whether to play the sound request. These steps include determining whether the sound request corresponds to one or more user sound request actions. If it is determined that the sound request corresponds to at least one of the user sound request actions then the sound request is audibly played at the audio output. However, if the sound request does not correspond to at least one of the user sound request actions, then the audio request is suppressed and not played at the audio output.04-14-2011
20120230516USER PROFILE BASED AUDIO ADJUSTMENT TECHNIQUES - Embodiments are directed toward user profile based audio adjustment techniques. The techniques are used to render various audio and/or audio/video content having different audio output parameter values in accordance with a user profile that characterizes a user's desired value and/or range of one or more of the output parameter levels.09-13-2012
20090323986Method and Apparatus for Audio Normalization - A request is received to play an audio file. A determination is made regarding whether volume normalization parameters associated with the audio file are stored in a media library. If the volume normalization parameters associated with the audio file are stored in the media library, the volume normalization parameters are retrieved from the media library. If the volume normalization parameters associated with the audio file are not stored in the media library, retrieving the volume normalization parameters from the audio file. The volume normalization parameters are applied while playing the audio file. The volume normalization process can be applied across multiple audio files during playback.12-31-2009
20110075861Method and Apparatus for Controlling Audio Input Amplitude - Amplitude of an audio input may be dynamically controlled within a predefined range of an analog-to-digital converter (ADC) threshold voltage. In one embodiment, an analog audio signal having a first voltage amplitude may be received by an amplifier. The analog audio signal may be amplified based on a gain control signal and converted to digital audio data by the ADC. The difference of the first voltage amplitude and the threshold voltage of the ADC may be determined and a gain control signal can be adjusted for the amplifier based, at least in part, on the difference in the first voltage amplitude and the threshold voltage of the ADC. The received analog audio signal characterized by a second voltage amplitude can be output.03-31-2011
20110075862Method and Apparatus for Mute Control - System and method for muting an output terminal of an electronic device. In one embodiment, the process for can include receiving one or more signals received by the controller over the first terminal, detecting a mute control signal from the controller and controlling the state of a switch coupled to the output terminal to ground the output terminal based on detecting the mute control signal.03-31-2011
20110150242ADAPTIVE LOUDNESS LEVELLING FOR DIGITAL AUDIO SIGNALS - A time-domain method of adaptively levelling the loudness of a digital audio signal is proposed. It selects a proper frequency weighting curve to relate the volume level to the human auditory system. The audio signal is segmented into frames of a suitable duration for content analysis. Each frame is classified to one of several predefined states and events of perceptual interest is detected. Four quantities are updated each frame according to the classified state and detected event to keep track of the signal. One quantity measures the long-term loudness and is the main criterion for state classification of a frame. The second quantity is the short-term loudness that is mainly used for deriving the target gain. The third quantity measures the low-level loudness when the signal is deemed to not contain important content, giving a reasonable estimate of noise floor. A fourth quantity measures the peak loudness level that is used to simulate the temporal masking effect. The target gain to maintain the audio signal to the desired loudness level is calculated by a volume leveller, regulated by a gain controller that simulates the temporal masking effect to get rid of unnecessary gain fluctuations, ensuring a pleasant sound.06-23-2011
20100303259ELECTRONIC DEVICE AND METHOD FOR USING THE SAME - An electronic device includes an audio module, a processor module connected to the audio module, and a sensor module connected to the processor module. The processor module directs the sensor module to detect temperatures at predetermined positions when the audio module plays back audio content, and the processor module regulates the playback volume or turns off the audio module according to the detected temperatures.12-02-2010
20100260355Sound Processing Apparatus, Sound Processing Method, Information Recording Medium, and Program - In a sound processing apparatus (10-14-2010
20090147970MOBILE TERMINAL AND SOUND INPUT/OUTPUT CONTROL METHOD FOR MOBILE TERMINAL - According to one aspect of the invention, a mobile terminal includes: a case having two flat faces opposite to each other and side faces having a first side face and a second side face opposed to each other; a first sound input/output unit provided on the first side faces; and a second sound input/output unit provided on the second side face.06-11-2009
20100098267Method And Apparatus For Layered Audio - A system and method for providing layered audio which allows a user to selectively and simultaneously listen to multiple audio sources for limited time periods and switch between these layered audio sources. The system allows a user to discernibly listen to two content sources at the same time.04-22-2010
20090161888AUTO GAIN CONTROL AMPLIFIER, AUTO GAIN CONTROL SYSTEM AND AUTO GAIN CONTROL METHOD - An auto gain control amplifier that amplifies an input signal including a variable gain amplification unit that amplifies an input signal and an auto gain control unit that monitors amplitude of an output signal of the variable gain amplification unit, obtains an gain of the variable gain amplification unit that causes the amplitude of the output signal to fall within a desired range according to the amplitude of the output signal, and supplies the gain obtained to the variable gain amplification unit. The auto gain control unit sets the gain in the variable gain amplification unit when the amplitude of the output signal is equal to or below a predetermined reference value.06-25-2009
20080253586SYSTEMS AND METHODS FOR CONTROLLING AUDIO LOUDNESS - Embodiments of a system and method of controlling the loudness of an audio signal are disclosed. The method includes determining a long term loudness level for the audio signal over a first sliding time period, determining a short term loudness level for the audio signal over a second sliding time period where the second sliding time period is shorter than the first sliding time period, detecting a segment transition in the audio signal; and generating a gain control signal. The gain control signal is based on the short term loudness level for a first time interval after a segment transition and the gain control signal is based on the long term loudness level after the expiration of the first time interval. Other embodiments include addition signal analysis steps to identify different segments of a signal and to control the loudness of the segments.10-16-2008
20080253587METHOD FOR AUTOMATICALLY ADJUSTING AUDIO VOLUME AND AUDIO PLAYER - A method is for automatically adjusting audio volume in a decoder that decodes digital audio data for each frame in which gain information that describes the audio volume of the frame is included. The method includes: storing a first gain information that is included in a preceding frame and used for decoding the preceding frame in a memory device; obtaining a second gain information that is included in a current frame; calculating a difference between the first gain information and the second gain information; adjusting the second gain information in accordance with the calculated difference; and decoding the current frame using the adjusted second gain information.10-16-2008
20080253585APPARATUS AND METHOD FOR CONTROLLING VOLUME - A zero-crossing detector detects a zero-crossing point by monitoring an amplitude of an audio signal, and generates a zero-crossing detection signal that becomes a predetermined level for every detected zero-crossing point. A timer circuit counts a clock signal, and generates a timing signal that becomes a predetermined level every time a predetermined unit transition time elapses. A volume setting unit receives the zero-crossing detection signal and the timing signal, and transits the volume from a current value to a target value in a step-wise manner. Every time the timing signal becomes the predetermined level, the volume setting unit changes the volume by a predetermined width at a transition timing at which the zero-crossing detection signal becomes a predetermined level immediately thereafter, and repeats such process to execute volume transition from the current value to the target value.10-16-2008
20110164763AUDIO AND VIDEO RECORDING AND REPRODUCTION APPARATUS FOR REPRODUCING AUDIO SIGNALS HAVING DIFFERENT VOLUME LEVELS - An audio and video recording and reproduction apparatus includes an audio signal switch section for outputting one of a first audio signal having a first volume level and a second audio signal having a second volume level by a switching operation; and a mute section for muting the first audio signal which is output from the audio signal switch section when the audio signal switch section switches the second audio signal to the first audio signal.07-07-2011
20110255713AUTOMATIC VOLUME CONTROL FOR AUDIO SIGNALS - A technique is provided for automatically adjusting the volume, or magnitude, of an audio signal. The technique includes calculating an average power associated with a segment of an input audio signal, determining whether the average power is greater than an estimated signal level associated with one or more previously-processed segments of the input audio signal and, depending on the determination, either calculating an updated estimated signal level by subtracting from the average power an attenuated difference between the estimated signal level and the average power or setting the updated estimated signal level to the average power. A gain to be applied to the segment of the input audio signal is then determined based on the updated estimated signal level and a target signal level for an output audio signal.10-20-2011
201002845483-Point positioning device and method thereof - A 3-point positioning device senses a scene including an auxiliary positioning module by means of an image sensor, and accordingly generates a sensed image. The auxiliary positioning module comprises a first, a second, and a third auxiliary positioning units. By means of the sensed image, the 3-point positioning device recognizes a first, a second, and a third sensing units of the image sensor corresponding to the first, the second, and the third auxiliary positioning units. In this way, the 3-point positioning device can calculate out an absolute location of the auxiliary positioning module according to the locations or the received power of the first, the second, and the third sensing units.11-11-2010
20120201400AUDIO MIXING CONSOLE - An audio mixing console comprises a first amplifier, an analogue to digital converter, a second amplifier and a gain range control unit. The first amplifier may receive an analogue audio input signal and amplify the received audio input signal with a first adjustable gain. The analogue to digital converter may receive the amplified analogue audio input signal and generate a digital audio signal by an analogue to digital conversion of the analogue audio signal. The second amplifier may receive the digital audio signal and amplify the received digital audio signal with a second adjustable gain. The gain range control unit may identify a signal level overload at the analogue to digital converter and control the gain of the first and second amplifiers, respectively.08-09-2012
20110033065AUTOMATIC AND DYNAMIC NOISE CANCELLATION FOR MICROPHONE-SPEAKER COMBINATIONS - An audio host device has a headset electrical interface in which a reference contact is shared by a microphone and a speaker. A variable or programmable gain amplifier, PGA, has a signal input coupled to a sense point for the reference contact. A first difference amplifier has its inputs coupled to a microphone contact and the PGA through a first gain stage; a second difference amplifier has its inputs coupled to the microphone contact and to the output of the PGA, through a second gain stage having a different gain than the first gain stage; a third difference amplifier has its inputs coupled to the microphone contact and the output of the PGA through a third gain stage having a gain in between that of the first and second gain stages. A controller monitors outputs of the first and second difference amplifiers and changes a gain setting of the PGA. Other embodiments are also described and claimed.02-10-2011
20110135114IMAGE DISPLAY DEVICE, CONTROL METHOD AND COMPUTER PROGRAM - Provided is an image display device provided with an image display unit for displaying a still image or a moving image, an image capturing unit for capturing the image in a direction in which the image display unit displays the image on the image display unit, and a face detection unit for performing, at predetermined intervals, face detection processing for detecting a face included in the image captured by the image capturing unit, wherein the predetermined intervals are variable according to whether or not the face of a user is included in the image captured by the image capturing unit, and when the position of the detected face does not change for a predetermined period of time in the face detection processing, the face detection unit does not detect the face as the face of the user.06-09-2011
20110081028Addressable amplified speaker assembly and method for addressing the same - Addressable amplified speakers assembly, and method for addressing the same, suitable for any permanent or temporary public address paging application. Amplified speakers assembly may incorporate VHF and UHF radios to provide wireless, one-way paging from a few feet to many miles away. These speakers can be added to any existing radio system with minimal effort or cost. The need for routing signal cable is eliminated, greatly reducing installation costs. Each speaker can be programmed for individual, group, or all-page access via DTMF or 2-Tone coding (up to 8 different addresses). The volume of each speaker can also be controlled remotely.04-07-2011
20110081027AUDIO REPAIR METHODS AND APPARATUS - An audio recording may be repaired by implementing a processor to process the harmonic signal content of the audio recording; calculating a difference signal from the harmonic signal content by subtracting a predicted harmonic signal from a detected harmonic signal, the predicted harmonic signal being obtainable by a predictor means and the detected harmonic signal being detected by the processor; defining a threshold for the difference signal above which the difference signal indicates the occurrence of one or more acoustic excitation events; and thereby producing an events display which allows an operator to visually distinguish between indicated excitation events that are present as a result of a disturbance in the audio recording and indicated excitation events that are present as a result of natural harmonics in the audio recording; and repairing one or more of the displayed excitation events by a repair circuit which is in communication with the processor.04-07-2011
20110255712AUDIO SIGNAL ADJUSTMENT DEVICE AND AUDIO SIGNAL ADJUSTMENT METHOD - To perform volume control matching the actual auditory sensation level of a human so as to improve the control accuracy. As shown in FIG. 10-20-2011
20110135115SOUND ENHANCEMENT APPARATUS AND METHOD - A sound enhancement apparatus and method which produce low IMD over a broadband frequency region and performs BSE to offer a sound which is natural to the human ears, are provided. The sound enhancement apparatus includes a preprocessor, a BSE signal generator, and a gain controller. The preprocessor divides a source signal into a high-frequency signal and a low-frequency signal and analyzes the low-frequency signal to obtain prediction information regarding a degree of distortion that will be generated by the low-frequency signal. The BSE signal generator generates a higher harmonic signal for the low-frequency signal as a BSE signal to be substituted for the low-frequency signal, wherein the order of the higher harmonic signal is adjusted based on the prediction information regarding the degree of distortion. The gain controller adjusts a synthesis ratio of the low-frequency signal and the BSE signal adaptively depending on the prediction information regarding the degree of distortion.06-09-2011
20110096943Audio Console System - An audio console system includes an input for receiving an audio signal. The system may also include a user adjustable input amplifier which may amplify audio signals received from the input with a predefined gain. The system may additionally include a direct out output amplifier provided after the adjustable input amplifier. The direct out output amplifier may output a direct out output signal. The direct out output amplifier may adjust a gain of a signal transmitted from the adjustable input amplifier. The direct output amplifier may be configured in such a way, that, upon a user adjustment of the adjustable input amplifier, the direct out output amplifier may adjust the gain of the direct out output signal inversely to the adjustment of the input amplifier resulting in a predefined gain of the audio signal from the at least one input to the direct out output being maintained.04-28-2011
20100158275METHOD AND APPARATUS FOR AUTOMATIC VOLUME ADJUSTMENT - The invention provides an apparatus capable of automatic volume adjustment. In one embodiment, the apparatus comprises a speaker, an array microphone located in the vicinity of the speaker, a beamforming module, a signal-to-noise ratio calculation module, and a volume adjustment module. The speaker first broadcasts a first audio signal. The array microphone converts a sound into a plurality of second audio signals. The beamforming module derives a speaker sound signal and an ambient noise signal from the second audio signals, wherein the speaker sound signal mainly comprises speaker sound components generated by the speaker and the ambient noise signal mainly comprises noises other than the speaker sound components. The signal-to-noise ratio calculation module calculates a ratio of a first power of the speaker sound signal to a second power of the ambient noise signal to obtain a signal-to-noise ratio. The volume adjustment module then adjusts a volume of the first audio signal according to the signal-to-noise ratio before the first audio signal is delivered to the speaker.06-24-2010
20110051959Sound Volume Adjusting Apparatus - A sound volume adjuster includes: a storage which stores a first value of a volume setting value and an allowable maximum change amount; a receiver which receives a change request indicating a second value of the volume setting value; a determiner which, when a change amount of the volume setting value between the first value and the second value exceeds the allowable maximum change amount, determines that the change request is an excessive request; and an adjuster which, when the determiner determines that the change request is the excessive request: changes the first value stored in the storage by a change amount which is equal to or smaller than the allowable maximum change amount to set a third value of the volume setting value; and adjusts a sound volume by the third value.03-03-2011
20100067718MODIFICATIONS OF AUDIO COMMUNICATIONS IN AN ONLINE ENVIRONMENT - A system and method to modify audio communications in an online environment and, in particular, to modifying audio communications using one or more parameters. The system includes a module configured to detect one or more parameters applicable to an incoming audio communication and a weighing engine configured to weigh the one or more parameters and obtain a weighted volume. The system further includes a module configured to transmit the weighted volume to a user participating in a virtual universe. The method determines whether one or more parameters apply to an incoming communication, weighs the incoming communication based on the one or more parameters to determine a weighted volume of the incoming communication, and transmits the incoming communication to a user at the weighted volume.03-18-2010
20090175468METHODS FOR PREVENTING UNWANTED SOUND CAUSED BY GAIN CHANGES - An electronic device capable of preventing unwanted sound caused by gain changes are provided. An amplifier thereof amplifies an input signal and generates a amplified signal. An analog-to-digital converter (ADC) thereof converts the amplified signal to a digital signal. An automatic gain controller (AGC) thereof updates a gain of the amplifier according to a strength of the amplified signal or amplified digital signal. A smoothing unit thereof updates a gain of the digital signal from the ADC before and/or after the AGC updates the gain of the amplifier, such that click-and-pop caused when the AGC updates the gain of the amplifier is eliminated.07-09-2009
20100027812METHOD AND AN APPARATUS FOR PROCESSING AN AUDIO SIGNAL - An apparatus for controlling a volume of an audio signal and method thereof are disclosed, by which a volume of an input signal can be controlled by using a non-linear gain curve and a target volume of the input signal. The present invention includes storing a non-linear gain curve indicating relations between volumes of an input signal and an output signal; receiving an input signal and target volume information; determining a first gain by using the volume of the input signal and the target volume information; determining a second gain from one of a) the volume of the input signal and the target volume information or b) the first gain, by using the non-linear gain curve; and adjusting the volume of the input signal by applying the second gain to the input signal, wherein the non-linear gain curve is generated by using non-linearity information. A volume of an input signal of this invention is controlled using a non-linear gain curve indicating a relation between a volume of an input signal and a volume of an output signal. Therefore, the present invention is able to reduce or expand a dynamic range of an output volume.02-04-2010
20100020988INDIVIDUAL AUDIO RECEIVER PROGRAMMER - Methods and devices to compensate for individual hearing loss when listening to audio systems are described. An individualized frequency configuration is applied to the output of an audio system wherein the volume of audio signals at one or more frequencies is adjusted to compensate for a user's hearing deficit. The devices are operable to work with multiple users.01-28-2010
20090220109Audio Gain Control Using Specific-Loudness-Based Auditory Event Detection - In one disclosed aspect, dynamic gain modifications are applied to an audio signal at least partly in response to auditory events and/or the degree of change in signal characteristics associated with said auditory event boundaries. In another aspect, an audio signal is divided into auditory events by comparing the difference in specific loudness between successive time blocks of the audio signal.09-03-2009
20120039490Controlling the Loudness of an Audio Signal in Response to Spectral Localization - The invention relates to modifying the loudness of an audio signal by measuring the weighted broadband level of the audio signal and modifying that weighted broadband level as a function of a spectral localization estimate of the audio signal.02-16-2012
20120039489VOLUME CONTROL METHOD AND ELECTRONIC DEVICE CAPABLE OF AUTOMATIC VOLUME ADJUSTMENT - A volume control method is to be performed by an electronic device for adjusting intensity of an output audio signal outputted from the electronic device according to an external audio signal of an environment in which the electronic device is located. The volume control method includes: configuring the electronic device to receive the external audio signal; configuring the electronic device to compare a sound track of the external audio signal with a preset sound track and to make a determination as to whether a degree of similarity between the two sound tracks reaches a preset ratio; and configuring the electronic device to stop outputting the output audio signal when a result of the determination is affirmative.02-16-2012
20130010984Method for controlling entertainment equipment based on performer position - A method and system for automatically and reliably controlling equipment for outputting sound and, potentially, lighting, pyrotechnics and other effects in live entertainment productions based upon the real-time physical location of one or more specific performers within a performance area in either an absolute sense or relative to a controlled article of equipment. The system includes a radio frequency identification subsystem and an equipment control subsystem.01-10-2013
20100166223ADJUSTING ACOUSTIC SPEAKER OUTPUT BASED ON AN ESTIMATED DEGREE OF SEAL OF AN EAR ABOUT A SPEAKER PORT - A degree of seal of an ear about a speaker port may be estimated by detecting touch contact between the ear and at least one touch sensor in fixed relation to the speaker port. The degree of seal is estimated based on the detected touch contact. Based upon the estimated degree of seal, the acoustic output of the speaker may be adjusted. The adjustment may compensate for perceived changes to the quality of the acoustic output resulting from the degree of seal. The at least one touch sensor may be a plurality of touch sensors spaced around the speaker port. Each sensor may have a truncated wedge shape, with a narrow end closest to the speaker port. Upon receipt of user input indicative of a high degree of ear seal, a sample of the sensor(s) may be taken and stored for using during future estimation of the degree of seal.07-01-2010
20120155674SOUND PROCESSING APPARATUS AND RECORDING MEDIUM STORING A SOUND PROCESSING PROGRAM - A sound processing apparatus includes a first calculator that calculates first power based on a first signal received by a first microphone that is among the first microphone and a second microphone; a second calculator that calculates second power based on a second signal received by the second microphone; a gain calculator that calculates a gain on the basis of the ratio of the first power to the second power; and a multiplier that processes the second signal using the gain calculated by the gain calculator.06-21-2012
20110064246Microphone Interface and Method of Operation - An interface is provided between a transducer and audio processing circuitry. The interface has a switching device coupled to the transducer. The interface also has a first signal path that is selectively coupled to transducer via the switching device and includes a first output, the first signal path being configured to selectively receive input signals from the transducer, and form a first output signal at the first output by amplifying the input signals to provide a first gain. The first output is coupled to the audio processing circuitry. A second signal path is provided that is selectively coupled to the transducer via the switching device and includes a second output. The second gain is selected to be substantially larger than the first gain. The switching device is configured to switch the input signal between the first signal path and the second signal path.03-17-2011
20120008802VOICE DETECTION FOR AUTOMATIC VOLUME CONTROLS AND VOICE SENSORS - A voice detection system and method for automatic volume controls and voice sensors is disclosed. More specifically, the invention addresses a situation where the user's own voice undesirably affects the functionality of an automatic volume control for a two-way communication device, such as a cellular telephone. In addition, the invention proposes solutions wherein one (voice) microphone is employed and also, when two (voice and noise) microphones are employed. Further, an algorithm is disclosed that addresses the issue concerning the user's own voice in an AVC pertaining to the two microphone solution. Yet further, a method herein is disclosed that detects the presence of voice in a single non-selective (noise) microphone.01-12-2012
20120008801"POSSE" -- an acronym for "Personal OnStage Sound Enhancer" - A stage monitoring system is described and claimed that provides musical performers the ability to carefully control the local sounds they are hearing during a performance independently of the house sound system and independently of the other musicians on stage. A complete and unique system constituting an improved method of monitoring oneself during an aural performance, by way of a discreet mixer that sums the collective audio signals coming from a vocal microphone, a mono or stereo instrument input, stereo ambient microphones and signals from two auxiliary inputs. The unit sends the audio signal from the ‘Instrument In’ and the ‘Vocal In’ to an audio recording console or live performance mixing console.01-12-2012
20120057726Sound volume limiter using continuous evaluation of the incurred sound exposure dose to prevent hearing damage without degrading the user experience - A system and method is described for automatically limiting the sound exposure incurred by users of sound reproducing devices, by continuously tracking and evaluating the cumulative sound exposure dose. Instead of limiting the average sound level to a fixed maximum, the user retains freedom to adjust the sound volume to higher or lower levels. However, if the system determines that the overall cumulative sound dose is approaching a certain pre-set value presumed to be potentially hazardous, the gain and compression settings of the sound reproducing device are modified in order to limit sound exposure. This is done in such a way that the interference with the user experience is minimized. Optionally, the user is also provided with controls to temporarily boost the sound level, which then gradually falls back to a level that is acceptable for prolonged exposure. The sound limiting system starts acting more quickly and aggressively as the tracked sound exposure dose becomes higher.03-08-2012
20120014539SIGNAL PROCESSING APPARATUS, SEMICONDUCTOR CHIP, SIGNAL PROCESSING SYSTEM, AND METHOD OF PROCESSING SIGNAL - In a signal processing apparatus, a high frequency level detecting unit detects a level of a high frequency component adjusted with a first adjusting unit, and a first control unit controls a first gain of the adjusting unit according to the level of the high frequency component thus detected. Further, a low frequency level detecting unit detects a level of a low frequency component adjusted with a second adjusting unit. A second control unit controls a second gain according to the level of the high frequency component and the level of the low frequency component thus adjusted, so that a difference between the level of the high frequency component adjusted with the first adjusting unit and the level of the low frequency component adjusted with the second adjusting unit becomes smaller than a specific level determined in advance.01-19-2012
20120014538AUDIO EQUIPMENT AND A CONTROL METHOD THEREOF - Method of controlling the volume level of a system that consisting of an audio equipment (01-19-2012
20120014537System and Method for Automatic Microphone Volume Setting - Optimal microphone volumes are automatically set for computer applications based on determination of peak volume levels and noise levels from one or more digital audio captures. The peak volume levels and noise levels can be advantageously determined based on distribution curves of sample volume levels in the digital audio captures. Clipping can be automatically compensated for by estimating peak unclipped capture volume levels from the distribution curves.01-19-2012
20120014540METHOD AND APPARATUS FOR AUDIO NORMALIZATION - A request is received to play an audio file. A determination is made regarding whether volume normalization parameters associated with the audio file are stored in a media library. If the volume normalization parameters associated with the audio file are stored in the media library, the volume normalization parameters are retrieved from the media library. If the volume normalization parameters associated with the audio file are not stored in the media library, retrieving the volume normalization parameters from the audio file. The volume normalization parameters are applied while playing the audio file. The volume normalization process can be applied across multiple audio files during playback.01-19-2012
20110085681ACOUSTIC PROCESSING DEVICE - There is provided an acoustic processing device capable of maintaining volume and reproducing audio signals with good sound quality independent of the media audio encoding format, sound source type or sound source volume setting. In the acoustic processing device (04-14-2011
20090252349METHOD OF LIMITING THE MAXIMUM PERMITTED SOUND VOLUME IN AN EARPHONE, AND AN EARPHONE FOR CARRYING OUT THE METHOD - A method of limiting the maximum permitted sound volume in an earphone, a headset or the like, includes the step that the size of the driving signal for driving the earphone is sensed. The driving signal has a voltage that is less than approx. 0.7 V. If the driving signal exceeds a certain level, a part of the driving signal is shunted past the earphone. A second part of the driving signal is diverted. Either the voltage of the diverted part is increased and controls the shunt device by which the first part of the driving signal is shunted past the earphone, or it is supplied to a unit with a detector device and the shunt device. The unit is sensitive to work at voltages below approx. 0.7 V. An earphone or the like for the above-mentioned method comprises a shunt device and a detector device whose current source is the signal source of the earphone.10-08-2009
20120250890AUDIO DEVICE AND METHOD FOR AUDIO OUTPUTTING - An audio device includes a headphone jack to receive a headphone plug, an audio output unit connected to the headphone jack, a detecting unit, and a control unit. The detecting unit detects insertion or removal of a headphone plug from the headphone jack. The control unit decreases an output power of the audio output unit to a preset value within a preset period in response to the detected insertion or removal of the headphone plug, and recovers the output power of the output unit to an original value after the preset period is elapsed. A related method is also provided.10-04-2012
20120250891PERSONAL LISTENING DEVICE WITH SELF-ADJUSTING SOUND VOLUME - An exemplary personal listening device includes thermo-sensitive elements in its transducers. Each thermo-sensitive element senses temperature change of a corresponding transducer and changes a current flowing through the transducer according to temperature change of the transducer, to reflect the amount of time for which the personal listening device has been working.10-04-2012
20120250895SYSTEM FOR ADJUSTING PERCEIVED LOUDNESS OF AUDIO SIGNALS - A method of adjusting a loudness of an audio signal may include receiving an electronic audio signal and using one or more processors to process at least one channel of the audio signal to determine a loudness of a portion of the audio signal. This processing may include processing the channel with a plurality of approximation filters that can approximate a plurality of auditory filters that further approximate a human hearing system. In addition, the method may include computing at least one gain based at least in part on the determined loudness to cause a loudness of the audio signal to remain substantially constant for a period of time. Moreover, the method may include applying the gain to the electronic audio signal.10-04-2012
20120027227PERSONALIZED ADJUSTMENT OF AN AUDIO DEVICE - Described herein are apparatuses, systems and methods that facilitate user adjustment of an audio effect of an audio device to match the hearing sensitivity of the user. The user can tune the audio device with a minimum perceptible level unique to the user. The audio device can adjust the audio effect in accordance with the minimum perceptible level. For example, a loudness level can adjust automatically to ensure that the user maintains a perceptible loudness, adjusting according to environmental noise and according to the minimum perceptible level. Also described herein are apparatuses, systems and methods related to an audio device equipped with embedded audio sensors that can maximize a voice quality while minimizing the effects of noise.02-02-2012
20090136061AUDIO LEVEL COMPRESSOR - An audio level compressor for compressing the dynamic range of an input audio signal. The audio level compressor can be part of a microphone, or a separate component. The audio level compressor includes input terminals for receiving the input audio signal, a lamp having a filament resistance that is a function of the input audio signal; a load resistance; a signal gain controller that includes a means for increasing dynamic range compression of the input audio signal, and output terminals for providing an output audio signal that is a function of the input audio signal and the signal gain. The signal gain controller provides a signal gain that is a function of the filament resistance and the load resistance. The audio level compressor can also include an expander circuit or a power conditioning circuit. Power can be provided by an internal source or a phantom power supply.05-28-2009
20130156227SOUND OUTPUT DEVICE AND METHOD OF ADJUSTING SOUND VOLUME - A sound output device of the present invention is one that receives a digital audio signal including a plurality of channels and performs digital signal processing on the received digital audio signal, and includes a detecting portion which detects peak values or effective values of the plurality of channels included in the digital audio signal. The sound output device also includes an electric power calculating portion which calculates necessary electric power to output sound of each of the channels according to the peak values or the effective values. The sound output device also includes a sound volume adjusting portion which adjusts sound volume of the digital audio signal according to a total of the necessary electric power calculated by the electric power calculating portion for each of the channels.06-20-2013
20110081029ACOUSTIC PROCESSING DEVICE - There is provided an acoustic processing device capable of applying acoustic processing matching listener's sense to reproduce an audio signal with satisfactory sound quality in terms of auditory sense irrespective of the characteristics of a sound source. The acoustic processing device (04-07-2011
20120106759SPEAKER SYSTEM AND METHOD FOR OPTIMIZING OUTPUT OF SPEAKER THEREOF - A speaker system and a method for optimizing an output of a speaker thereof are provided. The speaker system includes a speaker, an automatic gain control amplifier, a volume adjustment unit, a controller, and an indication unit. The function of the automatic gain control amplifier may be intelligently optimized by the controller, so that the controller may remind the user that the automatic gain control amplifier is operated in a reduced dynamic range through the indication unit in case that the volume adjustment unit receives an input sound frequency signal of a very high intensity. With the help of the indication unit, the user may easily find an optimal operation spot of the automatic gain control amplifier, and the speaker system may generate enough sound with a good dynamic range.05-03-2012
20100172516TO SYSTEMS FOR ACOUSTIC DIFFUSION - Described is a unit for amplifying and processing audio signals for driving an electro-acoustic transducer (D), comprising: an input for audio signals; a processor for audio signals (07-08-2010
20100246855DYNAMIC AUDIO PARAMETER ADJUSTMENT USING TOUCH SENSING - An audio communications device has a handset in which a touch sensing ear piece region is coupled to an acoustic leakage analyzer. The acoustic leakage analyzer is to analyze signals from the touch sensing ear piece region and on that basis adjust an audio processing parameter. The latter configures an audio processor which generates an audio receiver input signal for the device. Other embodiments are also described and claimed.09-30-2010
20120163631AUTOMATIC AUDIO SIGNAL LEVEL ADJUSTMENT CIRCUIT - An automatic audio signal level adjustment circuit is capable of automatically adjusting a level of an input audio signal within a specific range. The automatic audio signal level adjustment circuit includes an amplitude adjustment determining unit and an amplitude adjusting unit. The amplitude adjustment determining unit is configured to generate an amplitude reduction instruction when the level is greater than a first reference value, and an amplitude augmentation instruction when the level is small than a second reference value. The amplitude adjusting unit is configured to output an output audio signal having an amplitude reduced from that of the input audio signal upon the amplitude reduction instruction, and an output audio signal having an amplitude augmented from that of the input audio signal upon the amplitude augmentation instruction. Further, the amplitude adjusting unit is configured to output an output audio signal equal to the input audio signal upon no instruction.06-28-2012
20120163630AUDIO PROCESSING APPARATUS, AUDIO PROCESSING SYSTEM, AUDIO PROCESSING METHOD - An audio processing apparatus includes a first capture module, a limitation module, a second capture module, and a release module. The first capture module is configured to capture an external input. The limitation module is configured to transmit a sound volume limitation command to at least one external device including an audio output function when the first capture module captures the external input. The second capture module is configured to capture a sound input after the first capture module captured the external input. The release module is configured to transmit, after the second capture module captured the sound input, a release command for the sound volume limitation on the one or more external devices limited by the limitation module at a timing that differs according to the sound input captured by the second capture module.06-28-2012
20100208917AUDITORY SENSE CORRECTION DEVICE - There is provided an auditory sense correction device capable of adding favorable loudness characteristics to an output sound without depending on sound source characteristics of an audio signal even when a high-frequency band or a low-frequency band of the audio signal has already been subjected to loudness correction. The auditory sense correction device 08-19-2010
20110182441INTERACTION OF SOUND, SILENT AND MUTE MODES IN AN ELECTRONIC DEVICE - This is directed to controlling the output of audio based on the mode of an electronic device. In particular, this is directed to an electronic device having a sound mode, silent mode, and mute mode controlling the output of audio along different audio output routes. In the sound mode, all audio can be output, while only registered or authorized audio can be output in the silent mode. In the mute mode, no audio can be output. The sound and silent modes can be enabled using an interface of the device (e.g., a switch having two possible states), while the mute mode can be enabled using an accessory coupled to the device. To disengage the mute mode, a user can provide a corresponding instruction using the accessory, or providing an instruction on the device related to volume control. For example, a user can change the device volume using an on-device interface, or toggle a sound/silent switch to a sound mode.07-28-2011
20120134511MULTICHANNEL AUDIO CODER AND DECODER - An apparatus configured to: determine at least one time delay between a first signal and a second signal; generate a third signal from the second signal dependent on the at least one time delay; and combine the first and third signal to generate a fourth signal; divide the first and second signals into a plurality of time frames; determine for each time frame a first delay associated with a start of the time frame of the first signal and a second time delay associated with an end of the time frame of the first signal; select from the second signal at least one sample in a block defined as starting at the combination of the start of the time frame and the first time delay and finishing at the combination of the end of the time frame and the second time delay; and stretch the selected at least one sample to equal the number of samples of the first frame.05-31-2012
20120314886MODIFICATIONS OF AUDIO COMMUNICATIONS IN AN ONLINE ENVIRONMENT - A system and method to modify audio communications in an online environment and, in particular, to modifying audio communications using one or more parameters. The system includes a module configured to detect one or more parameters applicable to an incoming audio communication and a weighing engine configured to weigh the one or more parameters and obtain a weighted volume. The system further includes a module configured to transmit the weighted volume to a user participating in a virtual universe. The method determines whether one or more parameters apply to an incoming communication, weighs the incoming communication based on the one or more parameters to determine a weighted volume of the incoming communication, and transmits the incoming communication to a user at the weighted volume.12-13-2012
20120250893HYBRID PERMANENT/REVERSIBLE DYNAMIC RANGE CONTROL SYSTEM - A system for controlling dynamic range of an audio signal comprises an automatic gain control element that receives an input signal having a varying level and outputs a control signal that varies based on the varying level of the input signal and a modified input signal having a dynamic range different than a dynamic range of the input signal. The system also comprises an inverter that inverts the control signal or a block-based control signal corresponding to the control signal in block format. The system also comprises a variable gain element that receives the modified input signal and at least some of the inverted control signal or block-based control signal. The variable gain element also outputs a remainder signal corresponding to the modified input signal as unmodified based on the at least some of the inverted control signal or block-based control signal.10-04-2012
20120250892SIGNAL PROCESSOR AND SIGNAL PROCESSING METHOD - According to one embodiment, a signal processor includes a band divider, a first correction module, a determiner, an adjuster, and a second correction module. The band divider calculates an amplitude indicating sound pressure from an acoustic signal for each frequency range. The first correction module corrects the amplitude to change the dynamic range of the amplitude to a target range. The determiner determines whether the maximum amplitude of amplitudes corrected by the first correction module is equal to or larger than a threshold. The adjuster adjusts first and second coefficients based on the first condition if the maximum amplitude is equal to or larger than the threshold. The second correction module adds a value obtained by multiplying the acoustic signal by the first coefficient to a value obtained by multiplying the correction amount of the amplitude by the second coefficient, and outputs a resulting value as an output signal.10-04-2012
20120250894APPARATUS INCLUDING MEANS FOR CONNECTING TO ONE OR MORE OUTER SPEAKERS AS WELL AS MEANS FOR DETECTING SUCH A CONNECTION - An audio appliance includes two external connections for connection to external loudspeakers, and includes means for establishing an electrical signal between the external terminals that is representative of an audio source in order to inject an excitation electric current into each external loudspeaker. Means are provided for incorporating a component at a “detection” frequency that is situated outside the audible spectrum in the electrical signal that is established between the external terminals, together with means for detecting an electric current flowing between the external terminals and having a frequency corresponding to the detection frequency. This is applicable in particular to systems comprising a mobile appliance and a fixed docking station incorporating a woofer and designed to receive the mobile appliance.10-04-2012
20120170770CHARGE PUMP CIRCUIT - A bipolar output charge pump circuit having a network of switching paths 07-05-2012
20120170772METHOD AND APPARATUS FOR DYNAMICALLY ADJUSTING VOLUME - A method for dynamically adjusting volume is disclosed, which includes: determining dynamic adjustment step size I of output volume according to the preset time interval T of fading volume, the preset frequency F of fading volume, and the difference between the preset output volume V07-05-2012
20120170771Method Of Leveling A Plurality Of Audio Signals - A system with an input amplifier to receive and amplify a first audio signal, an output amplifier to output an audio signal which includes at least one of the amplified first audio signal and a second audio signal, a controller to adjust the input amplifier to a first input amp gain and the output amplifier to a first output amp gain to provide an output signal including the first audio signal at a first output signal level. The controller is to adjust the output amplifier to a second output amp gain to provide an audio output including the second audio signal at a second output signal level and determine an output amp ratio by dividing the first output amp gain with the second output amp gain. The controller is to determine a target input amp gain by multiplying the first input amp gain by the output amp ratio and adjust the first input amp gain to the target input amp gain to provide an audio output including the first audio signal at a third output signal level.07-05-2012
20120250889AUTOMATIC VOLUME REDUCTION - Systems and methods of controlling output volume in mobile devices may include an apparatus having logic to detect a limited power delivery condition of a battery of a mobile platform. The logic may also transmit a hardware alert to an audio controller of the mobile platform in response to the limited power delivery condition, wherein the hardware alert is to instruct the audio controller to conduct a speaker volume reduction to an audible level. In one example, the logic enables the use of one or more high power speakers such as stereo integrated hands free speakers in the mobile device.10-04-2012
20100054499APPARATUS AND METHOD FOR CONTROLLING AUDIO OUTPUT, AND MOBILE TERMINAL SYSTEM USING THE SAME - An audio output controlling apparatus and method, and a mobile terminal system using the same control settings of an audio out port according to whether an audio frame includes an audio signal. The audio output controlling method includes receiving an audio frame, determining whether an audio signal is included in the audio frame, and setting, depending on whether the audio signal is included in the audio frame, a power voltage provided to an audio out port. The mobile terminal includes a wireless transceiver; an audio unit, through an audio out port, an audio frame among the wireless data; and an audio output controlling unit to control a power voltage of the audio out port. The apparatus includes a section determining unit; and a power controlling unit to set a power voltage provided to an audio out port according to whether the audio signal is included in the audio frame.03-04-2010
20120177227SOUND VOLUME CONTROL CIRCUIT - A sound volume control circuit includes: a first operational amplifier; a variable resistor circuit connected between an output and an inverting input of the first operational amplifier and having a plurality of resistance values; an R-2R ladder circuit connected between a voltage source of an input voltage; and a control circuit controlling the variable resistor circuit and the R-2R ladder circuit; wherein when changing a resistance value of the variable resistor circuit from a first resistance value to a second resistance value, so as to change the output voltage in a step size where a difference between the output voltage corresponding to the first resistance value and the output voltage corresponding to the second resistance value is further segmented, the control circuit changes the magnitude of the electric current flowing to the variable resistor circuit by use of the R-2R ladder circuit.07-12-2012
20120177226BATTERY POWER MONITORING AND AUDIO SIGNAL ATTENUATION - To reduce the risk of brown outs and resets in a mobile station using a far-field speaker, a voltage level of a battery and a level of an input audio signal are monitored. When the level of the audio signal increases past a threshold level, and the voltage level of the battery falls below a threshold voltage, an attenuation is determined and applied to the audio signal. The applied attenuation reduces the volume of the audio signal, which reduces the risk of a brown out or a reset due to insufficient voltage in the mobile station.07-12-2012
20120177225Smart Un-muting Based on System Event with Smooth Volume Control - An approach is provided that receives an audio request from a request source while an information handling machine, such as a computer system, is in a muted state. The request source is compared with a list of one or more un-mute sources stored in a memory. If the comparison reveals that the request source is included in the list of un-mute sources, then the audio request is audibly played.07-12-2012
20120177228PROCESS FOR ADJUSTING THE SOUND VOLUME OF A DIGITAL SOUND RECORDING - The present invention relates to a process for adjusting the sound volume of a digital sound recording characterised in that it comprises: a step consisting of determining, in absolute values, for a recording, the maximum amplitude values for sound frequencies audible for the human ear, a step consisting of calculating the possible gain for a specified sound level setting, between the maximum amplitude value determined above and the maximum amplitude value for all frequencies combined, a step consisting of reproducing the recording with a sound card by automatically adjusting the amplification gain level making it possible to obtain a sound level for the recording of a specified value so that it corresponds to the gain calculated for this recording.07-12-2012
20090060226AUDIO CIRCUIT FOR DISPLAY - An audio circuit arranged in a display includes an audio input connector configured to connect to an audio output connector of a computer to receive audio signals therefrom, an audio input circuit receiving the audio signals, an audio amplifier circuit connected to the audio input circuit to amplify the audio signals, an audio output circuit outputting the amplified audio signals, a first output connector connected to the audio output circuit, a volume adjusting circuit, a micro control unit (MCU) of a motherboard of the display connected to the volume adjusting circuit, and a speaker connected to the first output connector. The volume adjusting circuit receives a control signal from the MCU to control the volume adjusting circuit to adjust the audio signals, and the speaker receives the adjusted audio signals.03-05-2009
20120263321Method and System for Audio Level Detection and Control - In a method and system for audio level detection and control, an amplitude of an audio signal may be compared to a threshold and an attenuation applied to the audio signal may be adjusted based on the comparison. In instances that the amplitude of the audio signal is greater than or equal to the threshold the adjustment may comprise increasing a first attenuation factor until the amplitude of the audio signal is less than the threshold. The first attenuation factor may be subsequently decreased until the amplitude of the audio signal is greater than or equal to the threshold or until the first attenuation factor is equal to zero. The attenuation of the audio signal may be controlled via a digital gain circuit within the hardware audio CODEC, wherein an overall attenuation factor of the digital gain circuit is a sum of the first attenuation factor and a second attenuation factor.10-18-2012
20120263320Gain Control Device for an Amplifier and Related Methods, and an Audio Processing Device - A gain control device for an amplifier and related methods, and an audio processing device are described herein. In one aspect, a gain control device for an amplifier includes: a receiver module configured to receive a control signal; a gain control module configured to control the gain of said amplifier based on said control signal. In another aspect, an audio processing device includes: a microphone; an audio player; and an amplifier, wherein said amplifier includes a gain control device configured to receive a control signal and to control the gain of said amplifier based on the received control signal. In another aspect, a method for controlling the gain of an amplifier includes: receiving a control signal; controlling the gain of said amplifier based on said control signal. The described methods and device reduce the application cost and size.10-18-2012
20120257770METHOD AND APPARATUS TO SUPPLY POWER VOLTAGE TO A MOBILE DEVICE IN A VARIABLE MANNER - A method and apparatus to supply a power voltage to a mobile device in a variable manner in order to provide high output power and a high quality sound environment and a mobile device using the same. The apparatus includes a volume control unit to detect installation of an external power supply and to generate a voltage control value corresponding to a current volume level, and a DC-DC converter unit to convert a voltage of an internal power supply in a variable manner on the basis of the voltage control value generated in the volume control unit in order to drive the switching power amplifier.10-11-2012
20090016547Sound volume controller - A sound volume controller includes a level adjustment section that adjusts a level of an input audio signal and outputs the adjusted input audio signal as an output audio signal, a level detection section that detects the level of the input audio signal, a volume value detection section that detects a volume value set by a user, a coefficient table storage section that stores a coefficient table which describes a relation between levels of the output audio signal and levels of the input audio signal, a coefficient table change section that changes the coefficient table stored in the coefficient table storage section in accordance with the volume value detected by the volume value detection section, and a setting section that sets an amount of level adjustment of the level adjustment section in accordance with the level of the input audio signal detected by the level detection section and the coefficient table.01-15-2009
20110123047AUDIO PROCESSING SYSTEM FOR AN AUDIO OUTPUT DEVICE - An exemplary audio processing system includes a gain control unit, a sampling unit, and a triggering unit. The gain control unit is configured for amplifying an audio signal. The sampling unit is configured for sampling the audio signal. The triggering unit is configured for generating a gain reduction unit if the amplitude exceeds a predetermined value over a predetermined time period. The first predetermined value is set so that if the amplitude of the audio signal exceeds the predetermined value and the gain of the gain control unit is not reduced, the amplitude of the amplified audio signal exceeds a predetermined acceptable range. The gain control unit is also configured for reducing the gain of the gain control unit responding to the gain reduction signal to limit the amplitude of the amplified audio signal within the predetermined acceptable range.05-26-2011
20110002481AUDIO SIGNAL AMPLITUDE ADJUSTING DEVICE AND METHOD - An audio signal amplitude adjusting device and method that can always adjust the amplitude of an input audio signal to such a level as to be easy to hear with making it follow each shift in the level of the input audio signal, thus preventing the occurrence of the sense of aural discomfort and an interruption of a voice. The gain of a variable attenuator for adjusting the amplitude of the audio signal is controlled in various ways. When a momentary large noise sound is contained in the audio signal, the gain reduced state invoked to suppress the effect of the noise sound is detected, and thereafter if the amplitude of the audio signal has become smaller than the reference level due to the noise sound ending, the gain is increased each period that is shortest among the periods of control employed.01-06-2011
20120263319AUDIO CONTROL OF MULTIMEDIA OBJECTS - In some examples, aspects of the present disclosure may include techniques for audio control of one or more multimedia objects. In one example, a method includes receiving an electronic document that includes a group of one or more multimedia objects capable of generating audio data. The method also includes registering a multimedia object of the group of one or more multimedia objects, wherein registering the multimedia object comprises storing a multimedia object identifier that identifies the multimedia object. The method further includes receiving audio data; and determining, by a computing device, a volume level of the audio data generated by the registered multimedia object based on one or more configuration parameters, wherein the one or more configuration parameters define one or more volume levels associated with the multimedia object identifier. The method also includes outputting, to an output device, the audio data at the determined volume level.10-18-2012
20120263318SMART LINE-IN PROCESSING - Technology for smart line-in processing in an audio environment is disclosed. Particularly, the embodiments described herein provide automated source switching in an audio environment where a number of audio sources may exist and volume control.10-18-2012
20110038491Passive sound pressure level limiter - A passive sound pressure level (SPL) limiter is provided that can be used with audio sources of varying drive levels and headsets, earbuds, etc. of varying sensitivity. The SPL limiter includes a control circuit that includes a rectifier and, in most configurations, a step-up transformer. The SPL limiter also includes a limiting circuit that utilizes a transistor to shunt current from the audio source in proportion to a control signal output by the control circuit. The control circuit may further include a low pass filter, for example an RC filter, and one or more fast limit diode paths. The limiting circuit may further include a feedback network to increase the linear behavior of the limiting circuit.02-17-2011
20120269363TEMPERATURE COMPENSATED MICROPHONE - A method and a device for eliminating or minimizing the sensitivity changes in a microphone due to temperature changes. The temperature-induced changes in the sensitivity can be caused by the changes in the sound-to-electrical signal transducer, in the microphone membrane, in the ASIC or other reasons. One or more temperature dependent components in the microphone or in a microphone module are used to offset the temperature-induced changes in the sensitivity. Sensitivity of a microphone is defined as the output voltage for a specific acoustic stimulus and load condition.10-25-2012
20120128179Audio Device - An audio device (e.g. an AV amplifier), with a plurality of audio output terminals according to the HDMI standard, converts audio data of a source device into audio signals suited to audio reproduction abilities (e.g. channel counts) of sink devices. The audio device stores a plurality of audio reproduction ability information describing the predetermined channel count thereof and the channel counts of sink devices, wherein arbitrary audio reproduction ability information precluding audio reproduction ability information of a sink device with the smallest channel count is provided to a source device. The audio device performs down-mixing on audio signals with respect to a sink device whose channel count is smaller than the predetermined channel count, whilst the audio device performs signal processing on audio signals with respect to a sink device whose channel count is larger than the predetermined channel count.05-24-2012
20110158433SPEAKER SYSTEM AND SPEAKER DRIVING CIRCUIT - A speaker system includes a first speaker, a second speaker and a driving circuit. The first speaker and the second speaker are different types of speakers. The driving circuit drives the first speaker with a first driving voltage and a first driving current and drives the second speaker with a second driving voltage and a second driving current, wherein the first driving voltage is larger than the second driving voltage and the first driving current is smaller than the second driving current. The present disclosure further provides a speaker driving circuit.06-30-2011
20110158432Audio Volume Control Circuit and Method Thereof - An audio volume control circuit includes a signal intensity calculating circuit for generating a first signal intensity value corresponding to a signal intensity corresponding to an audio channel data; a low-pass filter for filtering the first signal intensity to generate a second signal intensity value; an averaging unit for averaging the second signal intensity value and previous M−1 second signal intensity values to obtain a third signal intensity value, with M being a natural number greater than 1; a gain calculating circuit for obtaining an original gain value according to the third signal intensity value with reference to the adjustment condition; a buffer for temporarily storing the audio channel data; and an audio volume adjusting circuit for generating an adjustment gain value according to the original gain value to adjust the audio channel data stored in the buffer.06-30-2011
20120087516SYSTEM AND METHODS FOR DYNAMICALLY CONTROLLING ATLEAST A MEDIA CONTENT WITH CHANGES IN AMBIENT NOISE - Disclosed are methods and system method for dynamically maintaining at least an output volume of a media system at a predefined volume level in response to at least a change in an instantaneous ambient noise level. The method comprises the steps of: establishing the predefined volume level of the media system; measuring at least the change in the instantaneous ambient noise level; and adjusting dynamically the output volume of the media system against at least the change in the instantaneous ambient noise level to maintain the predefined volume level for a constant media experience.04-12-2012
20120321104Automatic gain control of amplifier by dynamic suppressing and output control at multiple stages - A method and apparatus for automatic gain control of an amplifier in which the method and apparatus detects excessive increase in the sound volume or temperature rise in the audio system and reduces the gain of the amplifier by various means. Each gain control circuit has a comparator to compare a signal with threshold values and an integrator to integrate output signals of the comparator with respect to a predetermined time length to reduce a gain of the amplifier. The method and apparatus conducts dynamic suppressing of excess signals and thereby controlling output level of the amplifier at multiple stages without immediately shutting down the audio system. In the case where the sound volume increases to a degree that may damage the amplifier or speaker, a shutdown signal is generated to shutdown the operation of the whole system.12-20-2012
20120328126AUDIO SIGNAL PROCESSING CIRCUIT - A selector selects an analog audio signal input to one input port from among analog audio signals input to multiple input ports according to an instruction from the user. An analog gain control circuit amplifies the analog audio signal received from the selector, with a corresponding one of the gains set for the respective input ports. An analog gain control circuit is configured to gradually change its gain when the gain is switched. An A/D converter converts an output signal of the analog gain control circuit into a digital audio signal. A first audio signal processing circuit is monolithically integrated on a signal semiconductor substrate.12-27-2012
20110293113APPARATUS, SYSTEMS AND METHODS FOR LIMITING OUTPUT VOLUME OF A MEDIA PRESENTATION DEVICE - Volume limiting systems and methods are operable to limit volume output from media presentation devices. An exemplary embodiment detects a sound using a microphone, wherein the sound corresponds to an audio output of at least one controlled media presentation device, and wherein the microphone is remotely located from the at least one controlled media presentation device; compares a level of the detected sound with a predefined maximum volume limit; generates a volume output limit command in response to the detected sound exceeding the predefined maximum volume limit; and communicates the volume output limit command to the media presentation device. The media presentation device then reduces a volume level of its audio output. In some instances, volume may be limited during user specified periods.12-01-2011
20120328125AUDIO CONTROLLING APPARATUS, AUDIO CORRECTION APPARATUS, AND AUDIO CORRECTION METHOD - According to one embodiment, an audio controlling apparatus includes a first receiver configured to receive audio signal, a second receiver configured to receive environmental sound, a temporary gain calculator configured to calculate temporary gain based on environmental sound received by second receiver, a sound type determination module configured to determine sound type of main component of audio signal received by first receiver, and a gain controller configured to stabilize temporary gain that is calculated by temporary gain calculator and set gain, when it is determined that sound type of main component of audio signal received by first receiver is music.12-27-2012
20120328127VOLUME AMPLITUDE LIMITING DEVICE - A volume amplitude limiting device includes a volume adjustment unit, an amplitude limiting unit, and a control unit. The volume adjustment unit adjusts the amplitude of an input sound signal to a larger degree as the adjustment value increases and outputs the resulting sound signal. The amplitude limiting unit limits the amplitude of the sound signal output from the volume adjustment unit to an output limitation value and outputs the resulting signal to a speaker. The control unit sets an adjustment value for the volume adjustment unit and also sets an output limitation value for the amplitude limiting unit according to an adjustment value.12-27-2012
20120288121ACOUSTIC CONTROL DEVICE - A DSP performs a sound volume adjustment processing that adjusts a playback sound volume in accordance with a signal level of acoustic data in acoustic contents. Further, when the DSP detects that the acoustic data is switched, the DSP initializes the adjustment to perform a reset processing that performs adjustment in accordance with the acoustic data which is a new playback target. When the changing instruction of the playback position of the acoustic data is accepted, an audio microcomputer instructs the DSP to perform the reset processing.11-15-2012
20120288122METHOD AND A SYSTEM FOR AN ACOUSTIC CURTAIN THAT REVEALS AND CLOSES A SOUND SCENE - A system and a method of operating the system which has at least two groups of sound providers, where the virtual position of the second group of sound providers is moved from the position of the first group of speakers to that of the second group of speakers. Also a third group of speakers may be used, the position of which is virtually moved from that of the first group via the position of the second group to that of the third group of speakers.11-15-2012
20100202633SOUND SYSTEM, SOUND REPRODUCING APPARATUS, SOUND REPRODUCING METHOD, MONITOR WITH SPEAKERS, MOBILE PHONE WITH SPEAKERS - The present invention relates to an apparatus for reproducing sound, a method for reproducing sound, a monitor with speakers, and a mobile phone with speakers. An apparatus according to the present invention is an apparatus for reproducing sound from original source signals, and comprises a control means, a first speaker, and a second speaker. The control means receives first and second original source signals, and controls magnitudes and phases of the received first and second original source signals so that a sound pressure level in a pre-determined zone is higher than a sound pressure level in zone other than the pre-determined zone, and outputs first and second controlled source signals. The first speaker receives the first controlled source signal and reproduces sound. The second speaker receives the second controlled source signal and reproduces sound. The apparatus according to the present invention can provide the sound environment in which only the person using the sound system enjoys the sound.08-12-2010
20100202632LOUDNESS MODIFICATION OF MULTICHANNEL AUDIO SIGNALS - Scaling, by a desired amount s08-12-2010
20130177173System and Method for Controlling Volume in Audio/Listening Devices - A system and method for automatically limiting or otherwise controlling the volume level within audio devices is provided. A sound level controlled amplification system is configured to sample audio signals for an audio device, and if above a predetermined limit, de-amplify the volume level to a safer level of sound, and control and maintain such safe level until the sample audio signal is within the predetermined limit of safe sound.07-11-2013
20130170668SOUND SYSTEM WITH INDIVIDUAL PLAYBACK ZONES - The invention relates to a sound system in a vehicle. The sound system comprises a first audio signal source providing a first audio signal and a second audio signal source providing a second audio signal. The sound system further comprises loudness determination unit is configured for determining a loudness of the first audio signal based on a psycho-acoustic model of a human hearing and a type information unit configured for establishing type information of the second audio signal. The sound system further comprises a control unit configured for individually selecting, for each of at least two playback zones, a mixing mode depending on the type of the second audio signal, wherein the mixing modes relate to a relation between signal output gains of the first and second audio signals. The control unit is further configured for individually mixing for playback, in each of the at least two playback zones, the first audio signal and the second audio signal based on the selected mixing mode and the determined loudness. The sound system further comprises a plurality of loudspeakers addressing individually the at least two playback zones.07-04-2013
20110274293METHOD, DEVICE AND COMMUNICATION TERMINAL FOR ADJUSTING VOLUME ADAPTIVELY - The present invention relates to the field of communications technology, and more particularly, to a method, a device and a communication terminal for adjusting volume adaptively. The present invention discloses a method for adjusting volume adaptively, including: receiving an audio signal from a sound source; obtaining information about the sound source corresponding to the audio signal and input and output gain parameters corresponding to the information about the sound source; and adjusting input volume and output volume according to the input and output gain parameters. The present invention also discloses an adaptive volume adjusting device, comprising a receiving unit, an obtaining unit and an adjusting unit. In addition, the present invention discloses a communication terminal comprising the preceding device. The advantage of the present invention is to automatically adjust input volume and output volume so that the users can hear an ideal voice.11-10-2011
20090097675SOUND PROVIDING SYSTEM - A performance sound supplying system includes a plurality of performer amplifiers that are disposed adjacent to performers of musical instruments positioned at different locations on a stage and reproduces supplied performance sound signals as sounds. Plural performance sound signals provided by the guitar, the keyboard, the base and the drum set performed by the performers are supplied to the mixer. A mixer is provided to render a sound volume balance adjustment on each of the supplied performance sound signals based on operations of an operator located on the audience seat side, and supplies the performance sound signals to the performer amplifiers corresponding to the performance sound signals. The mixer also supplies, based on operations by the operator, at least one of the performance sound signals to a non-corresponding performer amplifier among the performer amplifiers.04-16-2009
20130142361METHOD FOR CONTROLLING ALTITUDE INFORMATION-BASED USER FUNCTIONS AND MOBILE DEVICE ADAPTED THERETO - A method for controlling altitude information-based user functions and a mobile device adapted thereto are provided. The mobile device includes a storage unit for storing audio data that will be output according to the activation of a user function, and auxiliary data that will be applied to the audio data if an audio data altering function is set when the user function is activated, a sensing unit for collecting altitude information to set auxiliary data that will be applied to the audio data according to the activation of the user function, a controller for creating altered audio data by applying predefined auxiliary data to audio data that will be output when the user function is executed, according to the altitude information, and an audio processing unit for outputting the altered audio data.06-06-2013
20130094670SYSTEM AND METHOD FOR SYNCHRONIZING OPERATIONS AMONG A PLURALITY OF INDEPENDENTLY CLOCKED DIGITAL DATA PROCESSING DEVICES - An audio information source interface that receives first audio information from an audio information source directly connected to the audio playback device; an ADC configured to sample the first audio information; a network interface configured to connect the audio playback device to a network and to receive packets from the network containing second audio information and playback timing information from a network audio information source; a DAC for generating an analog audio signal based on either the first or second audio information; an audio amplifier interconnected with the DAC and configured to amplify the audio signal; an audio reproduction device interface interconnected with the audio amplifier; and, a control module configured to receive commands via the network interface and to provide to the DAC one of the first or second audio information.04-18-2013
20130094669AUDIO SIGNAL PROCESSING APPARATUS, AUDIO SIGNAL PROCESSING METHOD AND A PROGRAM - An audio signal processing apparatus which includes an input analysis unit which analyses the characteristics of an input signal and generates an input sound feature value; an environment analysis unit which analyses the characteristics of the environmental sound and generates an environmental sound feature value; a mapping control information generation unit which generates mapping control information as control information of amplitude conversion processing to the input signal by application of the input sound feature value and the environmental sound feature value; and a mapping process unit which performs amplitude conversion on the input signal based on a linear or non-linear mapping function determined according to the mapping control information and generates an output signal.04-18-2013
20130129115System and Method for Dynamic Range Extension Using Interleaved Gains - A method and system is presented for sampling analog signals in a manner that avoids the effects of signal clipping due to a limited dynamic range. A method and device for sampling an analog input using multiple gains, or gain mask, is described. By using different gains during different time quanta, a subset of the sampled points may effectively be attenuated before being sampled and converted to a digital representation. If clipping occurs during the sampling process, the true values of the clipped samples may be interpolated using the amplitudes of the non-clipped samples, which may not have been attenuated. Such interpolation may include constructing and/or solving a constraint optimization problem using linear programming. In one embodiment, such a problem may be constructed and/or solved by using sign information from the clipped samples and/or by imposing a sparsity assumption on the signals during the reconstruction process.05-23-2013
20110228953AUTOMATIC CORRECTION OF LOUDNESS LEVEL IN AUDIO SIGNALS - Systems and method for adapting a gain of an audio signal containing at least two different tracks with different signal level ranges. An example system includes a loudness determination unit for determining a perceived loudness of the audio input signal based on a psychoacoustic model of a human hearing. The system further includes a loudness adaptation unit configured to determine a loudness adaptation indicator based on the perceived loudness and a predetermined loudness, and to introduce the loudness adaptation indicator into the audio signal to generate an adapted gain signal. A gain determination unit is configured to adapt the gain for outputting the audio signal containing the at least two tracks based on the loudness adaptation indicators in the adapted gain signal at about the predetermined loudness.09-22-2011
20130148824AUTO VOLUME CONTROL METHOD FOR MIXING OF SOUND SOURCES - Disclosed is an auto volume control method and system for mixing of sound sources. The control method and system mixes the sound sources by controlling signals of the sound sources automatically inputted by a simple control method, such that the signals from a plurality of sound sources are mixed to prevent an overflow phenomenon of the sound sources from occurring.06-13-2013
20130148825VOLUME CONTROL SYSTEM, CONTROLLER PROGRAM OF THE VOLUME CONTROL SYSTEM, AND AUDIO OUTPUT DEVICE OF THE VOLUME CONTROL SYSTEM - A volume control system, that can easily check current volume values with respect to volume values settable in a plurality of audio output devices when a volume value representing the volume values of the audio output devices is displayed, is provided. A controller of the volume control system can be connected to the plurality of the audio output devices, and can control the audio output devices. The controller obtains the volume values of the audio output devices and predetermined upper limit volume values stored in the audio output devices, and displays percentages of the volume values with respect to the predetermined upper limit volume values as total volume values. Further, the controller displays values that are determined by multiplying the total volume values and percentages of the predetermined upper limit volume values with respect to prescribed values as the volume values of the audio output devices.06-13-2013
20130148826METHOD AND APPARATUS FOR PROCESSING AUDIO IN MOBILE TERMINAL - A method and an apparatus for processing audio data that controls pressure of a played sound to improve a quality of audio are provided. The method for processing audio in a mobile terminal includes: receiving the audio from a microphone; calculating by a controller a sound pressure level of the received audio; determining a sound pressure state of the received audio based on the calculated sound pressure level; and controlling an input gain of the audio based on the determination result.06-13-2013
20120275625SIGNAL PROCESSING DEVICE, METHOD THEREOF, PROGRAM, AND DATA RECORDING MEDIUM - Provided is a signal processing device including an analysis unit for analyzing a characteristic of an input signal, and generating an analysis feature, a mapping control information determination unit for determining, based on the analysis feature and information that is generated by learning and that is for obtaining mapping control information from the analysis feature, the mapping control information, and a mapping processing unit for performing amplitude conversion on the input signal based on a linear or non-linear mapping function decided based on the mapping control information, and generating an output signal.11-01-2012
20120275624ENERGY-SAVING AUDIO-AMPLIFIER CONTROL DEVICE - An energy-saving audio-amplifier control device is electrically connected to an amplifier for sensing an audio signal input state at a sound-source input end of the amplifier and controlling the on/off of the amplifier accordingly. The control device includes a signal detection module, a control module and a power control module. The signal detection module detects the state at the sound-source input end and generates a first signal to the control module. Based on the first signal, the control module controls the power control module to control the on/off of the amplifier. With these arrangements, it is able to automatically control the amplifier to off when the audio signal input to the amplifier is ended, and accordingly, achieve the purpose of saving energy, reducing power consumption, and minimizing loss of components.11-01-2012
20130156226VOLUME ADJUSTMENT CIRCUIT WITH AUTOMATIC GAIN CONTROL AND ELECTRONIC DEVICE USING SAME - A volume adjustment circuit includes an amplification circuit, a control circuit and an adjustment circuit. The amplification circuit amplifies a first audio signal received and generates a second audio signal, and outputs the second audio signal to an audio output terminal. The control circuit is electrically coupled to the audio output terminal, and is configured to generate a control signal based on the second audio signal. The adjustment circuit is electrically coupled to the control circuit, and configured to adjust an amplitude of the first audio signal inputted to the amplification circuit based on the control signal.06-20-2013
20120281860ALL IN ONE COMPUTER - An all in one (AIO) computer implemented as a personal computer (PC) or a display includes a high definition multimedia interface, a speaker, and a speaker control circuit. The speaker control circuit includes an earphone interface circuit, a main controller, a signal processing unit, and a signal control circuit. The earphone interface circuit detects whether an earphone is inserted into the AIO computer. When the earphone interface circuit detects the earphone is connected to the AIO computer, if the AIO computer is implemented as the PC, the main controller sends a first muting signal. If the AIO computer is implemented as the display, the main controller sends a second muting signal, and the signal control circuit controls and mutes the speaker according to the first muting signal and the second muting signal.11-08-2012
20130188808Method and Apparatus for Circuit with Low IC Power Dissipation and High Dynamic Range - An apparatus comprises a selected volume detector that detects a selected output volume; an analog output signal amplifier; a digital volume amplifier; a boost gain control element coupled to the selected volume detector; the analog output signal amplifier; and the digital volume amplifier; wherein the boost gain control element is configured to: keep a gain of a path of the digital volume amplifier and the analog output signal amplifier substantially constant, wherein the boost gain control element can adjust both: a) a gain of the digital volume control; and b) a gain of the analog output signal amplifier; to keep the gain of the path of the digital volume amplifier and the analog output signal substantially constant and equal to the selected output volume.07-25-2013
20110317854Speaker voume control with inidividual input and output impedance converters - A passive circuit that provides a variable means of controlling the audio speaker's volume level from a music instrument tube amplifier, without reducing the reactance of the audio speaker, allowing the audio speaker to reproduce sound in a natural way. The invention utilizes a multiple tapped input and a multiple tapped output transformers, along with a multiple tapped series resistive network, providing volume level control without reducing the audio speaker's reactance with a parallel resistive load. The input transformer with multiple taps, provides a variable means to impedance match the circuit to a plurality of impedance values available in common music instrument tube amplifiers. The separate output transformer with multiple taps, provides a variable means to impedance match the circuit to a plurality of impedance values available in common audio speakers. By utilizing the individual multiple tapped input and output transformers, the invention provides a means of converting the output impedance of the music instrument tube amplifier and separately converting an audio speaker with a dissimilar impedance value, to match the impedance requirements of the volume control circuit.12-29-2011
20120294461SOUND EQUIPMENT, VOLUME CORRECTING APPARATUS, AND VOLUME CORRECTING METHOD - Sound equipment is configured to average an average value of a signal level at each predetermined frequency band of a sound signal at a different averaging time, to weight the average value calculated at a different averaging time by using an individual weighting value, to obtain a representative value based on a weighted average value, to determine a gain of a sound signal based on an obtained representative value, to correct a volume based on the corresponding gain, and to correct a volume based on the gain. The representative value is obtained by selecting the average value at which a gain becomes minimum within each weighted average value. The averaging performs at least a first averaging using the averaging time corresponding to the sound signal that the signal level changes rapidly, and a second averaging using the averaging time longer than the averaging time of the first averaging.11-22-2012
20130101139MULTIBAND AUDIO DYNAMICS PROCESSOR - An audio system includes a level controller receiving an input audio signal from an audio medium. The level controller includes a gain adjust module producing an output audio signal based on the input audio signal. A filter arrangement is communicatively coupled to the level controller. The filter arrangement receives the output audio signal and divides the output signal into a plurality of filtered signals. Each of the filtered signals corresponds to a respective frequency band. A multiband dynamics controller is communicatively coupled to the filter arrangement. The multiband dynamics controller receives the filtered signals and applies a respective gain characteristic to each of the filtered signals to thereby produce a plurality of gain adjust signals. The gain adjust signals are combined into a multiband dynamics controller output signal.04-25-2013
20130101138ACOUSTIC DEVICE AND METHOD OF REPRODUCING ACOUSTIC SIGNAL - An acoustic device, which reproduces an acoustic signal of one acoustic source selected from a plurality of acoustic sources. A first averaging unit averages signal levels of the acoustic signal for a first time period to obtain a first average signal. A second averaging unit averages the signal levels for a second time period shorter than the first time period to obtain a second average signal. A selecting unit selects either the first average signal or the second average signal as one signal having a signal level higher than the other. A gain decreasing unit decreases a gain of the acoustic signal according to the signal level of the one signal if the signal level of the one signal is higher than a threshold value determined according to the one acoustic source. A correcting unit corrects the signal levels of the acoustic signal according to the gain.04-25-2013
20130202132Motion Based Compensation of Downlinked Audio - Embodiments relate to systems for, and methods of, compensating for movement of a loudspeaker relative to a user's head, where the loudspeaker is present in a mobile device. Example systems and methods produce (08-08-2013
20120093342MICROPHONE LINK SYSTEM - A microphone link system comprises a microphone that coverts an acoustic sound signal into an electrical sound signal, a slave unit that receives the electrical sound signal, a master unit, and a bus connecting the slave unit to the master unit. The slave unit comprises an analog-to-digital converter that converts the electrical sound signal into a digital sound signal; a signal processor that receives and processes the digital sound signal into a data signal; and a bus interface connected between the signal processor and the bus. The bus interface provides to the slave unit electrical power taken from the bus, sends the data signal to the master unit via the bus and receives from and sends to the master unit control signals via the bus.04-19-2012
20130208920Peripheral Apparatus - A peripheral apparatus, for connecting to a first or a second transmission port of an electronic device, includes a signal transmission interface, a triggering unit, an amplifying unit and an adjusting unit. The signal transmission interface, coupled to the first or the second transmission port, includes a first and a second group of pins. The triggering unit is coupled to the signal transmission interface. When the signal transmission interface is coupled to the first or the second transmission port, the triggering unit outputs a first or a second voltage level signal, respectively. The amplifying unit is coupled to the signal transmission interface and a functional unit. The adjusting unit, coupled to the signal transmission interface, the triggering unit, the amplifying unit and the functional unit, changes an output power transmitted from the amplifying unit to the functional unit according to the first or the second voltage level signal.08-15-2013
20130208919METHOD AND APPARATUS TO AUTOMATICALLY CONTROL AUDIO VOLUME - A method includes comparing a magnitude value of an audio signal in a fixed unit section with a target volume level, measuring audio gain in each fixed unit section using specific functions which are each determined to be different according to a ratio of the target volume level to the audio signal magnitude, and providing the measured audio gain to the audio signal in the fixed unit section.08-15-2013

Patent applications in class Automatic

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