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BINAURAL AND STEREOPHONIC

Subclass of:

381 - Electrical audio signal processing systems and devices

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application numberDescriptionNumber of patent applications / Date published
381300000 Stereo speaker arrangement 324
381017000 Pseudo stereophonic 320
381019000 Quadrasonic 150
381002000 Broadcast or multiplex stereo 66
381230100 Hearing aid 51
381028000 Amplifier 24
381026000 Stereo sound pickup device (microphone) 24
381027000 Center channel 9
Entries
DocumentTitleDate
20110206209Apparatus - An apparatus configured to determine at least one current phase difference between a first channel audio signal and a second channel audio signal for a current audio frame, calculate at least one phase difference estimate dependent on the at least one phase difference, determine a reliability value for each phase difference estimate, and determine at least one time delay value dependent on the reliability value for each phase difference estimate.08-25-2011
20130044883TECHNIQUES FOR PRESENTING SOUND EFFECTS ON A PORTABLE MEDIA PLAYER - Improved techniques for presenting sound effects at a portable media device are disclosed. The sound effects can be output as audio sounds to an internal speaker, an external speaker, or both. In addition, the audio sounds for the sound effects can be output together with other audio sounds pertaining to media assets (e.g., audio tracks being played). In one embodiment, the sound effects can serve to provide auditory feedback to a user of the portable media device. A user interface can facilitate a user's selection of sound effect usages, types or characteristics.02-21-2013
20100074449RECORDER AND RECORDING METHOD - To provide a recorder and other means for recording an audio signal of good quality with continuity maintained.03-25-2010
20090175456DETECTING STEREO AND MONO HEADSET DEVICES - The present invention includes apparatuses and methods comprising a means for detecting the presence of speakers and microphones coupled to a portable multi-function device (such as Apple's iPhone™). In response, a portable multi-function device can adapt its output depending on the nature of the coupled headset device. In particular, a portable multi-function device containing the present invention can, upon detecting only one speaker in a coupled headset accessory device, combine the multiple channels of a stereo audio signal into a single mono audio signal. Likewise, a portable multi-function device containing the present invention can alert users to the absence of a coupled microphone.07-09-2009
20100290628SIGNAL PROCESSING APPARATUS - A signal processing apparatus is provided. The signal processing apparatus comprises: an inputting section for inputting audio signals on a plurality of channels; an acoustic type acquiring section which is adapted to acquire an acoustic type of an audio signal on at least one channel of the audio signals; and a process controlling section which is adapted to control a characteristic of sound-field effect applied to the audio signals based on the acquired acoustic type.11-18-2010
20090154713Acoustic control apparatus for controlling acoustic in each individual space - An acoustic control apparatus in an acoustic apparatus capable of playing individual sound sources in a plurality of individual spaces by executing an acoustic process for the plurality of individual spaces provided in a predetermined range of space, includes an operation display unit enabling the sound source to be individually selected in each individual space, and a playing control unit executing playing control of the sound source selected by the operation display unit in each individual space.06-18-2009
20090154712APPARATUS AND METHOD OF OUTPUTTING SOUND INFORMATION - An azimuth and distance calculator calculates the relative direction and distance to the next intersection to be guided, based on information on the intersection supplied from storage for received information on an object to be guided and information on the moving histories of a user. Then, the calculator converts the relative direction into a horizontal angle and the distance to an elevation angle, and passes the angles to a stereophony generator. The stereophony generator creates output sound information having a sound image localized outside of a headphone and outputs the information to the headphone. In this manner, the user can accurately understand the distance to the object.06-18-2009
20090304186SOUND PROCESSING DEVICE, SPEAKER APPARATUS, AND SOUND PROCESSING METHOD - A sound processing device includes an inputting section which inputs L-ch audio data and R-ch audio data, a delaying section which applies a delaying process to the L-ch audio data and the R-ch audio data for a delay time that is set in a range from 62.5 microsecond to 125 microsecond, an adding section which adds the delayed L-ch audio data to the inputted L-ch audio data, and which adds the delayed R-ch audio data to the inputted R-ch audio data, a phase adjusting section which adjusts a phase of the added L-ch audio data into a phase that is different from a phase of the input L-ch audio data, and which adjusts a phase of the added R-ch audio data into a phase that is different from a phase of the inputted R-ch audio data, and an outputting section which adds the L-ch audio data whose phase is adjusted by the phase adjusting section to the inputted R-ch audio data and outputs resultant R-ch audio data, and which adds the R-ch audio data whose phase is adjusted by the phase adjusting section to the inputted L-ch audio data and outputs resultant L-ch audio data.12-10-2009
20090041254SPATIAL AUDIO SIMULATION - Equipment (02-12-2009
20090092258CORRELATION-BASED METHOD FOR AMBIENCE EXTRACTION FROM TWO-CHANNEL AUDIO SIGNALS - A method of ambience extraction includes analyzing an input signal to determine the time-dependent and frequency-dependent amount of ambience in the input signal, wherein the amount of ambience is determined based on a signal model and correlation quantities computed from the input signals and wherein the ambience is extracted using a multiplicative time-frequency mask. Another method of ambience extraction includes compensating a bias in the estimation of a short-term cross-correlation coefficient. In addition, systems having various modules for implementing the above methods are disclosed.04-09-2009
20090092257MULTI-CHANNEL AUDIO TREATMENT SYSTEM AND METHOD - A multi-channel audio treatment method ensuring compatibility of a multi-channel signal and a stereo signal, comprising 04-09-2009
20120224698WIRELESS AUDIO FREQUENCY PLAYING APPARATUS AND WIRELESS PLAYING SYSTEM USING THE SAME - A wireless audio frequency playing apparatus and a wireless playing system using the same are provided. The wireless playing system includes a wireless remote controller and the wireless audio frequency playing apparatus. The wireless audio frequency playing apparatus is operated under control of the wireless remote controller.09-06-2012
20090046863REMOTE-CONTROL DEVICE WITH DIRECTIONAL AUDIO SYSTEM - A method of directing an audio signal to an intended user by a remote-control device coupled to an audio/video device is described. The remote-control device sends an instruction to the audio/video device to transmit an audio signal. The remote-control device receives the audio signal and process the audio signal to generate a directional audio. The directional audio is then routed to an intended user such that the directional audio signal is audible to the intended user, other recipients in the vicinity.02-19-2009
20090028344Method and Apparatus for Processing a Media Signal - An apparatus for processing a media signal and method thereof are disclosed, by which the media signal can be converted to a surround signal by using spatial information of the media signal. The present invention provides a method of processing a signal, the method comprising of generating source mapping information corresponding to each source of multi-sources by using spatial information indicating features between the multi-sources; generating at least one rendering information by using the source mapping information and filter information having a surround effect; and performing smoothing by using neighbor rendering information of the at least one rendering information.01-29-2009
20090010440Apparatus and Method for Encoding/Decoding Signal - An encoding method and apparatus and a decoding method and apparatus are provided. The decoding method includes extracting a down-mix signal and spatial information regarding a plurality of channels from an input bitstream, and generating a three-dimensional (3D) down-mix signal by performing a 3D rendering operation on the down-mix signal using the spatial information and a filter, wherein the sum of the number of valid signals of the down-mix signal, the number of valid signals of the spatial information, and the number of valid signals of co-efficients of the filter is less than the number of valid signals of the 3D down-mix signal. Accordingly, it is possible to efficiently encode multi-channel signals with 3D effects and to adaptively restore and reproduce audio signals with optimum sound quality according to the characteristics of an audio reproduction environment.01-08-2009
20090003610Portable Device with Enhanced Stereo Image - The invention relates to a portable device with an enhanced stereo image, and more particularly a device in which an unsymmetrical placement of loudspeakers is compensated by means of electronic adjustment of the phase and level of the sound. The present invention provides a device (01-01-2009
20080292106Sound Reproducing System and Automobile Using Such Sound Reproducing System - The sound reproduction system provided for in-vehicle use includes: a music signal source; a first group of a first transducer, a second transducer, a third transducer and a fourth transducer connected to the music signal source; a signal processor to shift the phase of first sound signals output from the music signal source; and a second group of a first transducer, a second transducer, a third transducer and a fourth transducer connected to the signal processor.11-27-2008
20100303243 METHOD AND AN APPARATUS FOR PROCESSING A SIGNAL - A method of processing a signal is disclosed, which includes receiving a downmix signal, object information and rendering information; and generating downmix processing information using the object information and the rendering information, the object information including modified object level information, wherein the modified object level information is determined using a level of a modified object generated by applying a downmix gain to an object. Accordingly, in an apparatus for processing a signal and method thereof according to the present invention, the signal is decoded using object information including modified object level information. Therefore, since a downmix gain is not transmitted, the present invention is able to reduce a used bit for object information and decode a signal using less information.12-02-2010
20090097663Joint Sound Synthesis And Spatializaiton - The invention concerns a process for joint synthesis and spatialization of multiple sound sources in associated spatial positions, including: a) a step of assigning to each source at least one parameter (p04-16-2009
20100284542Matrix Decoder - This audio matrix surround decoder requires minimal digital processing, useful in portable applications, particularly in playback from a portable player using a headphone or loudspeaker virtualizer. In one embodiment it pans inputs Lt and Rt to outputs associated with front directions in response to a measure of the sum of Lt and Rt being greater than a measure of the difference between Lt and Rt, and pans Lt and Rt to outputs associated with rear directions in response to a measure of the sum of Lt and Rt being less than a measure of the difference between Lt and Rt. Lt and Rt are modified to shift the direction of reproduced signals.11-11-2010
20110299689Flameless Candle with Multimedia Capabilities - A flameless candle having speaker and lighting capability is provided. Multiple of such flameless candles can be used in a system to generate stereo or surround sound, as well as various lighting modes. The flameless candle or flameless candle system can have AM/FM radio functions, clock functions, alarm functions, etc., and can be used as an audio monitor. In addition, the flameless candle or candle system may be equipped with video capability.12-08-2011
20110261966Method and Apparatus for Applying Reverb to a Multi-Channel Audio Signal Using Spatial Cue Parameters - A method and system for applying reverb to an M-channel down-mixed audio input signal indicative of X individual audio channels, where X is greater than M. Typically, the method includes steps of: in response to spatial cue parameters indicative of spatial image of the downmixed input signal, generating Y discrete reverb channel signals, where each of the reverb channel signals at a time, t, is a linear combination of at least a subset of values of the individual audio channels at the time, t, and individually applying reverb to each of at least two of the reverb channel signals, thereby generating Y reverbed channel signals. Preferably, the reverb applied to at least one of the channel signals has a different reverb impulse response than does the reverb applied to at least one other one of the channel signals, t, is a linear combination of at least a sub-set of values of the individual audio channels at the time, t, and individually applying reverb to each of at least two of the reverb channel signals, thereby generating Y reverbed channel signals. Preferably, the reverb applied to at least one of the channel signals has a different reverb impulse response than does the reverb applied to at least one other one of the channel signals.10-27-2011
20080267413Method to Generate Multi-Channel Audio Signal from Stereo Signals - A perceptually motivated spatial decomposition for two-channel stereo audio signals, capturing the information about the virtual sound stage, is proposed. The spatial decomposition allows to re-synthesize audio signals for playback over other sound systems than two-channel stereo. With the use of more front loudspeakers, the width of the virtual sound stage can be increased beyond +/−30° and the sweet spot region is extended. Optionally, lateral independent sound components can be played back separately over loudspeakers on the two sides of a listener to increase listener envelopment. It is also explained how the spatial decomposition can be used with surround sound and wavefield synthesis based audio system. According to the main embodiment of the invention applying to multiple audio signals, it is proposed to generate multiple output audio signals (y10-30-2008
20100098258SYSTEM AND METHOD FOR GENERATING MULTICHANNEL AUDIO WITH A PORTABLE ELECTRONIC DEVICE - An electronic device manipulates a digital video having a video portion and an audio portion to encode the audio portion into a multichannel format. The electronic device may include an audio receiver for receiving the audio portion, and an image analyzer for receiving the video portion and determining at least one directional component of audio from an audio source. To determine the directional component, the image analyzer may include an image locator for determining a location of an audio source, and an orientation detector for determining an orientation of the audio source. An audio encoder may receive an input of the audio portion and the directional component, and the encoder may encode the audio portion in a multichannel format based on the directional component of audio from the audio source. The system may be applied to a plurality of audio sources in a digital video.04-22-2010
20090060203REBALANCING OF AUDIO - Rebalancing of an audio signal refers to achieving a balance of perceived loudness, typically of right and left channels, given an unbalanced input. A flexible method to automatically rebalance an audio input signal is robust against noise in extreme cases through the individual channels combined in various ways as a function of the loudness ratio between input channels.03-05-2009
20090034745SOUND IMAGE LOCALIZATION CONTROL APPARATUS - Provided is a sound image localization control apparatus for allowing, when sound is reproduced so as to perform sound image localization for a plurality of users, each of the plurality of users to variably adjust an acoustical effect individually without diminishing a sound image localization effect. The sound image localization control apparatus comprises: processing characteristic setting means (02-05-2009
20090052676Phase decorrelation for audio processing - A system for decorrelating audio data is provided. The system includes a noise generator generating a random noise signal. A phase shift system receives an input channel of audio data and the random noise signal and generates a phase shifted channel of audio data having a phase shift based on the random noise signal.02-26-2009
20080279388Method and Apparatus for Processing a Media Signal - An apparatus for processing a media signal and method thereof are disclosed, by which the media signal can be converted to a surround signal a surround signal by using spatial information of the media signal. The present invention provides a method of processing a signal, the method comprising of generating source mapping information corresponding to each source of multi-sources by using spatial information indicating features between the multi-sources; generating at least one rendering information by using the source mapping information and filter information having a surround effect; and performing interpolation by using neighbor rendering information of the at least one rendering information.11-13-2008
20080285760AUDIO SYSTEM FOR IMPROVING A SIGNAL TO NOISE RATIO - An audio system performing a class-D amplification includes a first pulse width modulation (PWM) signal generation unit and a second PWM signal generation unit. The first PWM signal generation unit generates a first switching signal based on a first audio signal. The second PWM signal generation unit generates a second switching signal based on a second audio signal. The second switching signal has a frequency difference with respect to the first switching signal such that a harmonic frequency component generated by interference between the first switching signal and the second switching signal is removed. Accordingly, the audio system performing the class-D amplification may improve a signal to noise ratio by minimizing influence of the harmonic frequency components on the first and second switching signals.11-20-2008
20130010967SPATIAL ANGLE MODULATION BINAURAL SOUND SYSTEM - A method of inducing a state of consciousness in a listener. The method includes providing first and second sound signals. The first sound signal is provided to one ear of the listener and the second sound signal is provided to the other ear of the listener. The second sound signal is different from the first sound signal and, when provided with the first sound signal, first and second sound signals cause the listener to perceive a first source of sound that is moving about the listener or as a tremolo effect.01-10-2013
20080212784Parametric Multi-Channel Decoding - A sound decoding device (09-04-2008
20110206208VEHICLE ENTERTAINMENT SYSTEM HAVING GROUND NOISE REDUCTION AND METHOD OF OPERATING THE SAME - A vehicle entertainment system and method that alternately configures an input of the entertainment system as a differential input that is decoupled from a ground point, or as ground referenced input that is coupled to a ground point. A noise detector determines a noise signal value for a ground switch module that alternately changes a switch state between a coupled state that couples the common channel connection to the ground point, and a decoupled state that decouples the common channel connection from the ground point, based upon the noise signal value being greater than a threshold.08-25-2011
20090129601Controlling the Decoding of Binaural Audio Signals - A method for generating a parametrically encoded audio signal, the method comprising: inputting a multi-channel audio signal comprising a plurality of audio channels; generating at least one combined signal of the plurality of audio channels; and generating one or more corresponding sets of side information including channel configuration information for controlling audio source locations in a synthesis of a binaural audio signal.05-21-2009
20090252337MULTI-CHANNEL DECODING SYSTEMS CAPABLE OF REDUCING NOISE AND METHODS THEREOF - A multi-channel decoding method includes: receiving an input signal to generate a first channel output signal and a second channel output signal, wherein the input signal is mixed with a specific clock signal; and gradually changing an amplitude of the specific clock signal from a first value to a second value when switching from a first mode corresponding to a first number of channels to a second mode corresponding to a second number of channels. Systems utilizing the method and another method further comprising calibration are also disclosed.10-08-2009
20090245523Adaptive High Fidelity Reproduction System - Audio is adaptively associated with speakers, depending on the speaker configuration that is present. Each speaker it receives an audio assignment based on its individual spectral characteristics. As more speakers are added, content is adaptively associated with that you speaker, and taken away from the previous.10-01-2009
20090316912DEVICE FOR AND A METHOD OF PROCESSING AUDIO DATA12-24-2009
20090274307AUDIO SYSTEM - Disclosed is an audio system including a group of loudspeakers that form a sound field by delivering into a single space sound signals passed through respective ones of a plurality of sound signal channels. This audio system is comprised of two characteristic-variable equalizers that are cascaded to each other to constitute a part of the sound signal channels; a sound field characteristics detecting part for supplying test signals through the sound signal channels and detecting sound pressure in the sound field and thereby obtaining a sound pressure signal; and a characteristics adjusting part for adjusting, based on the sound pressure signal, equalizing characteristics of the characteristic-variable equalizers individually and with respect to each of the sound signal channels. The sound field characteristics detecting part selectively generates test signals of different bands. The characteristics adjusting part adjusts equalizing characteristics of either one of the two characteristic-variable equalizers according to the band of the test signal.11-05-2009
20090116652Focusing on a Portion of an Audio Scene for an Audio Signal - Aspects of the invention provide methods, computer-readable media, and apparatuses for spatially manipulating sound that is played back to a listener over a set of output transducers, e.g., headphones. The listener can direct spatial attention to focus on a portion of an audio scene, analogous to a magnifying glass being used to pick out details in a picture. An input multi-channel audio signal that is generated by audio sources is obtained, and directional information is determined for each of the audio sources. The user provides a desired direction of spatial attention so that audio processing can focus on the desired direction and render a corresponding multi-channel audio signal to the user. A region of an audio scene is expanded around the desired direction while the audio scene is compressed in another portion of the audio scene.05-07-2009
20100226498Audio apparatus and audio processing method - The present invention provides an audio apparatus including: a decoding device configured to decode results of channel-by-channel reproduction of a multichannel sound source made up of at least a left channel, a right channel, and a center channel, and to down-mix the decoded results of channel-by-channel reproduction in accordance with the number of speakers configured in a speaker system without a center speaker corresponding to the center channel; an audio processing device configured to perform predetermined audio processing on the decoded results having undergone the down-mixing by the decoding device, and to get the processed results output from the speaker system; and a control device configured to control the audio processing device.09-09-2010
20100239096APPARATUS AND METHOD FOR GENERATING BINAURAL BEAT FROM STEREO AUDIO SIGNAL - An apparatus and method for generating a binaural beat for brainwave induction is provided. Upon receipt of a stereo audio signal, a decorrelator extracts a common component existing in common in both channels of the stereo audio signal, and outputs the remaining stereo components except for the extracted common component. A frequency shifter generates a common component in which the binaural beat is included, by shifting a frequency of the extracted common component. First and second mixers mix the common component in which the binaural beat is included, with the remaining stereo components.09-23-2010
20120195433DETECTION OF AUDIO CHANNEL CONFIGURATION - For an audio file that includes multiple channels of audio data, a novel device for detecting the configuration of the audio channels in the multi-channel audio file is presented. The device performs one or more algorithms to determine whether two or more channels are related. Such algorithms are used to distinguish stereo recordings from dual mono recordings. The algorithms are also used to detect any number of related channels, such as distinguishing six related channels from a set of surround sound microphones versus six unrelated channels (e.g., mono or a mixture of stereo and mono audio channels, etc.) These algorithms compare audio channels in pairs in order to determine which channels are sufficiently related as to constitute a stereo pair or a group.08-02-2012
20090285403Method and Apparatus for Improving Audio Reproduction for a Portable Electronic Device - The present invention discloses an audio signal processing device capable of transmitting at least one audio signal generated by an audio decoder to at least one first speaker and a second speaker. The audio signal processing device includes a signal mixer and at least one filter. By the at least one filter, a first signal having a frequency larger than a first specific frequency in each audio signal is transmitted to at least one first speaker, and a second signal having a frequency smaller than the first specific frequency in each audio signal is transmitted to the signal mixer and then transmitted to the second speaker.11-19-2009
20110026717Audio Output Device and Audio Output Method - An audio output device includes: a speaker unit including at least first to third speakers; and an audio signal processor configured to select either one of a first mode for outputting a stereo audio signal from the first and second speakers and a second mode for outputting a monaural audio signal from the third speaker and the first or second speaker.02-03-2011
20110026718VIRTUALIZER WITH CROSS-TALK CANCELLATION AND REVERB - Audio loudspeaker and headphone virtualizers and cross-talk cancellers and methods use separate virtual speaker locations for different Bark frequency bands and a single reverberation filter for multi-channel virtualizer inputs.02-03-2011
20100220864LOW FREQUENCY MANAGEMENT FOR MULTICHANNEL SOUND REPRODUCTION SYSTEMS - The present invention relates generally to sound reproduction systems and methods and more specifically to the reproduction of low-frequency signal components recorded in a Low Frequency Effects (LFE) channel. According to the invention there is provided a system comprising: n input channels (09-02-2010
20100310079Method for Encoding and Decoding Multi-Channel Audio Signal and Apparatus Thereof - Methods and apparatuses for encoding and decoding a multi-channel audio signal are provided. In the encoding method, spatial information is calculated based on a multi-channel audio signal and a down-mix signal, and a compensation parameter that compensates for the down-mix signal is calculated based on the multi-channel audio signal and the down-mix signal. Thereafter, a bitstream is generated by encoding the spatial information, the compensation parameter, and the down-mix signal and combining the results of the encoding. Therefore, it is possible to prevent deterioration of the quality of sound regarding a multi-channel audio signal by compensating for the multi-channel audio signal using a compensation parameter that compensates for a down-mix signal.12-09-2010
20090034744AUDIO SIGNAL ENHANCEMENT02-05-2009
20110116638Apparatus of generating multi-channel sound signal - An apparatus of generating a multi-channel sound signal is provided. The apparatus may include a sound separator to determine a number (N) of sound signals based on at least one of a mixing characteristic and a spatial characteristic of a multi-channel sound signal when receiving the multi-channel sound signal, and to separate the multi-channel sound signal into N sound signals, the sound signals being generated such that the multi-channel sound signal is separated, and a sound synthesizer to synthesize N sound signals to be M sound signals.05-19-2011
201100856682.1 Crossover Equalization in PC Audio Applications - Challenges to the implementation of equalization in the 2.1 environment arise from the constraints imposed by HD audio requirements and Windows® Vista™. A hybrid software hardware solution overcomes many of the challenges by exploiting the software capability for equalization and using a hardware codec to perform the separation into high frequency and low frequency audio streams needed to drive stereo speakers and a subwoofer.04-14-2011
20100260341ELECTRONIC DEVICE AND EXTERNAL EQUIPMENT WITH CONFIGURABLE AUDIO PATH CIRCUITRY - Electronic devices and accessories such as headsets for electronic devices are provided. A microphone may be included in an accessory to capture sound for an associated electronic device. Buttons and other user interfaces may be included in the accessories. An accessory may have an audio plug that connects to a mating audio jack in an electronic device, thereby establishing a wired communications path between the accessory and the electronic device. Path configuration circuitry may be used to selectively configure the path between the electronic device and accessory to support different operational modes. Analog audio lines in the wired path may convey left and right channel analog audio channels. When it is desired to convey power over the wired path, one of the analog audio channel lines may be converted to a power line. Audio functionality may be retained by simultaneously converting a unidirectional line into a bidirectional line using hybrids.10-14-2010
20090028345Apparatus and Method for Encoding/Decoding Signal - An encoding method and apparatus and a decoding method and apparatus are provided. The decoding method includes skipping extension information included in an input bitstream, extracting a three-dimensional (3D) down-mix signal and spatial information from the input bitstream, removing 3D effects from the 3D down-mix signal by performing a 3D rendering operation on the 3D down-mix signal, and generating a multi-channel signal using a down-mix signal obtained by the removal and the spatial information. Accordingly, it is possible to efficiently encode multi-channel signals with 3D effects and to adaptively restore and reproduce audio signals with optimum sound quality according to the characteristics of an audio reproduction environment.01-29-2009
20100260342SYSTEMS, METHODS, AND APPARATUS FOR CONTROLLING SOUNDS IN A THREE-DIMENSIONAL LISTENING ENVIRONMENT - Certain embodiments of the invention may include systems, methods, and apparatus for controlling sounds in a three dimensional listening environment. According to an example embodiment of the invention, a method is provided for controlling the apparent localization of sounds in a 3-dimensional listening environment. The method can include receiving one or more audio channels, receiving decode data associated with the one or more audio channels, routing the one or more audio channels to a plurality of processing channels, selectively processing audio associated with the plurality of processing channels based at least in part on the received decode data, and outputting processed audio to a plurality of speakers.10-14-2010
20120201385Graphical Audio Signal Control - Signal processing section of a terminal converts acquired audio signals of a plurality of channels into frequency spectra set, calculates sound image positions corresponding to individual frequency components, and displays, on a display screen, the calculated sound image positions results by use of a coordinate system having coordinate axes of the frequency components and sound image positions. User-designated partial region of the coordinate system is set as a designated region and an amplitude-level adjusting amount is set for the designated region, so that the signal processing section adjusts amplitude levels of frequency components included in the frequency spectra and in the designated region, converts the adjusted frequency components into audio signals and outputs the converted audio signals.08-09-2012
20110150227SIGNAL PROCESSING METHOD AND APPARATUS - Provided is a signal processing method which calculates a correlation coefficient indicating the degree of relation in a stereo signal and extracts a speech signal from the stereo signal by using the correlation coefficient and the stereo signal.06-23-2011
20090022327SYSTEM HAVING A PULSE WIDTH MODULATION DEVICE - A system, a device and a method for pulse width modulation is disclosed. One embodiment includes a pulse width modulation device, a first pulse width modulation mapper for pulse width modulation of a data signal, or a signal derived therefrom, and a second pulse width modulation mapper for pulse width modulation of a reference signal, or a signal derived therefrom. In one or more embodiments, the data signal e.g., can be a signal for a mono audio channel, or a signal for a stereo audio channel. The reference signal can be a signal including a constant signal level or a signal including a non-constant signal level an offset signal.01-22-2009
20090086982CROSSTALK CANCELLATION FOR CLOSELY SPACED SPEAKERS - A technique for canceling acoustic crosstalk is provided including a pre-processing filter and a crosstalk cancellation device. The pre-processing filter may be configured to obtain first and second channel signals and compensate or adjust the first and/or second channel signals for anticipated subsequent stage distortion by the crosstalk cancellation device. The crosstalk cancellation device maybe configured to receive the compensated first and second channel signals from the pre-processing filter. The crosstalk cancellation device then modifies the first channel signal to cancel anticipated acoustic crosstalk from the second channel signal, and modifies the second channel signal to cancel acoustic crosstalk from the first channel signal. The modified first channel signal is then transmitted over a first speaker and the modified second channel signal is transmitted over a second speaker. The first and second speakers may be closely spaced, yet provide a widened stereo image of the first and second channel signals.04-02-2009
20110261965Talk-Through Listening Device Channel Switching - A talk-through system for hearing protectors such as headphones, helmets, earplugs and the like, in which separate left and right microphones are controlled by separate left and right switches. The microphones allow ambient sound to be heard by the wearer of the hearing protector, and normally the wearer hears audio from both microphones in the appropriate ears. Pushing a switch causes the audio from the ear on which the switch is mounted to be enhanced and, preferably, switched to both ears. Various arrangements of control logic are provided such that activation of a switch can cause changes in audio processing.10-27-2011
20110019828Apparatus and method for sound enhancer - Apparatuses, methods, and systems directed to enhancing sound quality in audio signal transmissions. Some embodiments of the present invention comprise an audio signal processor operable to boost one or more frequency components of an input signal. In one embodiment, the audio signal processor boosts three frequency components comprising frequency bands centered near 300 Hz, 1.7 kHz, and 5.4 kHz. Other embodiments of the present invention can be used to enhance stereo audio signals comprising a left and a right input signal. The left and the right input signals are filtered and one or more frequency components of the left and the right input signals are boosted by one or more predetermined values. Some embodiments of the present invention comprise one or more integrated circuits comprising one or more analog or digital filters operable to boost one or more frequency components of an audio input signal.01-27-2011
20100098259AUDIO ENHANCEMENT SYSTEM - A stereo enhancement system processes the difference signal component generated from a pair of left and right input signals to create a broadened stereo image reproduced through a pair of speakers or through a surround sound system. Processing of the difference signal component occurs through equalization characterized by amplification of the low and high range of auditory frequencies. The processed difference signal is combined with a sum signal, generated from the left and right input signals, and the original left and right input signals to create enhanced left and right output signals.04-22-2010
20100166191Method and Apparatus for Conversion Between Multi-Channel Audio Formats - An input multi-channel representation is converted into a different output multi-channel representation of a spatial audio signal, in that an intermediate representation of the spatial audio signal is derived, the intermediate representation having direction parameters indicating a direction of origin of a portion of the spatial audio signal; and in that the output multi-channel representation of the spatial audio signal is generated using the intermediate representation of the spatial audio signal.07-01-2010
20100166190DEVICE FOR AND A METHOD OF PROCESSING AN AUDIO SIGNAL - A device for processing an audio signal, wherein the device comprises a detection unit adapted for detecting a widening state of the audio signal, and a widening modification unit adapted for modifying a widening characteristic of the audio signal depending on the detected widening state of the audio signal.07-01-2010
20100158257DIGITAL AUDIO STEREO IMAGER - An apparatus and a method for controlling, during playback, the composition of a pair of stereo separated audio signals in a stereo sound entertainment system by changing the stereo image width are disclosed. A digital mixer combines a portion of a first digital audio signal with a portion of a second digital audio signal to create a first mixed signal and a portion of the second digital audio signal with a portion of the first digital audio signal to create a second mixed signal. A listener controller independently controls, in accordance with a listener input, the portion of the first digital audio signal combined with the portion of the second digital audio signal and the portion of the second digital audio signal combined with the portion of the first digital audio signal.06-24-2010
20110051935METHOD AND APPARATUS FOR ENCODING AND DECODING STEREO AUDIO - A method of encoding stereo audio that minimizes a number of pieces of side information required for parametric-encoding and parametric-decoding of the stereo audio. The side information may include parameters about interchannel intensity difference (IID), interchannel correlation (IC), overall phase difference (OPD), and interchannel phase difference (IPD), which are required to restore the mono audio to the stereo audio.03-03-2011
20110216905CHANNEL COMPRESSION - Techniques implemented as systems, methods, and apparatuses, including computer program products, for logging multi-channel audio signals. The techniques include receiving a first audio input signal over a first audio channel and a second audio input signal over a second audio channel, the first audio channel and the second audio channel forming portions of a multi-channel call; generating supplemental information representative of characteristics of the first audio input signal, the second audio input signal, or both; after generating the supplemental information, combining the first audio input signal and the second audio input signal to form an audio output signal of a single-channel format; and storing the generated supplemental information in association with an identifier of the audio output signal, wherein at least a portion of the generated supplemental information is sufficient to enable information associated with the first audio input signal, the second audio input signal, or both to be derived from the audio output signal of the single-channel format.09-08-2011
20120148053DIRECTIONAL SOUND SYSTEM - A directional sound system is disclosed. The directional sound system (06-14-2012
20120148052System, Method, and Apparatus for Conveying a Signal to One or More Devices - A wire system comprising a splitter integrated between two wire portions. The wire system can be used to transmit a signal between a signal source and a first output device connected to the wire portions. At any time, a user can choose to couple one or more additional output devices to the splitter to access the same signal being transmitted to the first output device.06-14-2012
20110081022AUDIO JACK WITH EMI SHIELDING - An audio jack for an audio plug for use in an electrical device, comprising a non-conductive enclosure having a front side and defining a cavity having an aperture within the front side for receiving the audio plug, the aperture having a first diameter, the cavity extending along a longitudinal axis; a conductive shielding formed from sheet metal folded over at least five sides of the enclosure including the front side, the shielding defining a shielding aperture centered on the enclosure aperture and having a second diameter larger than the first diameter; and a ground contact connected to the conductive shielding.04-07-2011
20110064229AUDIO SIGNAL DECODING DEVICE AND BALANCE ADJUSTMENT METHOD FOR AUDIO SIGNAL DECODING DEVICE - Fluctuation in decoded signal localization is suppressed to maintain the feel of stereo. A selection unit (03-17-2011
20110064228DATA PROCESSING APPARATUS AND PARAMETER GENERATING APPARATUS APPLIED TO SURROUND SYSTEM - Calculation is performed for sound paths 03-17-2011
20120300941APPARATUS AND METHOD FOR REMOVING VOCAL SIGNAL - A method of removing a vocal signal is provided, the method including: extracting a difference signal between an input left signal and an input right signal of a stereo signal; obtaining left panning information of the input left signal from the input left signal, and right panning information of the input right signal from the input right signal; and generating an output left signal by applying the left panning information to the difference signal, and an output right signal by applying the right panning information to the difference signal.11-29-2012
20100172505AUDIO DEVICE - A signal processing section 07-08-2010
20100091997Integrated Vehicle Audio System - A loudspeaker, amplifier, media source, user interface, and mechanical interface are all contained in a single unit. The unit has a first portion configured to mount in a vehicle radio mounting location and a second portion configured to extend significantly outside the vehicle radio mounting location.04-15-2010
20100208899METHOD AND SYSTEM FOR ENHANCING BASS EFFECT IN AUDIO SIGNALS - The quality of music output from audio systems is improved by simulating the effect of low frequency signals in the human ear. This thus allows listeners to perceive the lower frequency signals, even though the speakers may be incapable of providing such low frequency outputs. A method is provided for processing enhancing bass effect in audio signals. The method also results in the bass enhancement being computationally less intensive. The bass effect enhancement techniques are based on the response of sine and cosine transfer functions and on the directional independence of low frequency components. The human ear is unable to resolve directions from low frequency components. The bass effect enhancement technique alternatively is based on the response of an exponential transfer function.08-19-2010
20120170755SYSTEMS AND METHODS FOR STEREO ECHO CANCELLATION - Acoustic echoes in communications systems are distracting and undesirable. Acoustic echoes occur in communications systems where sound produced by a speaker is picked up by a microphone in a communications system. In a stereo playback environment, echo cancellation techniques become more complicated. Echo cancellation can be performed by performing echo cancellation on a center signal, which is the sum of a left channel signal and the right channel signal, or left signal and a difference signal, which is the difference of the right channel signal and the left channel signal. The adaptation rates of the two echo cancellers meet certain constraints to prevent degeneracies in the echo cancellation system.07-05-2012
20110188660METHOD FOR ENLARGING A LOCATION WITH OPTIMAL THREE DIMENSIONAL AUDIO PERCEPTION - There is provided a method for enlarging a location with optimal three-dimensional audio perception. Optimal three-dimensional audio perception may relate to a fully spatial sound effect. The method includes deriving three-dimensional encoded localization cues from an audio input signal having a first channel signal and a second channel signal; decoding the first channel signal and the second channel signal into a plurality of decoded channel signals, the plurality of decoded channel signals being equal to a number of speaker units; performing crosstalk cancellation on the plurality of decoded channel signals to eliminate crosstalk between the plurality of decoded channel signals; and outputting the plurality of decoded channel signals which have been subjected to crosstalk cancellation to each of the number of speaker units. It is advantageous that the crosstalk cancellation includes further processing to generate a smoothed frequency envelope.08-04-2011
20120076304APPARATUS, METHOD, AND PROGRAM PRODUCT FOR PRESENTING MOVING IMAGE WITH SOUND - According to one embodiment, an apparatus for presenting a moving image with sound includes an input unit, a setting unit, a main beam former unit, and an output control unit. The input unit inputs data on a moving image with sound including a moving image and a plurality of channels of sounds. The setting unit sets an arrival time difference according to a user operation, the arrival time difference being a difference in time between a plurality of channels of sounds coming from a desired direction. The main beam former unit generates a directional sound in which a sound in a direction having the arrival time difference set by the setting unit is enhanced, from the plurality of channels of sounds included in the data on the moving image with sound. The output control unit outputs the directional sound along with the moving image.03-29-2012
20100284541RECEIVING APPARATUS - A receiving apparatus comprising: a frequency conversion unit configured to convert a received radio frequency signal to an intermediate frequency signal; an automatic gain control unit configured to control an amplitude level of at least either one of the radio frequency signal and the intermediate frequency signal according to a gain control signal; a demodulation unit configured to demodulate an audio signal from the intermediate frequency signal; a correction level output unit configured to output a correction level signal corresponding to a difference between a demodulation unit input level and a predetermined reference level, the demodulation unit input level being an amplitude level of the intermediate frequency signal inputted to the demodulation unit; and an addition unit configured to add the gain control signal and the correction level signal, to be outputted as a signal strength signal indicating received signal strength of the radio frequency signal.11-11-2010
20090060205Apparatus and Method for Encoding/Decoding Signal - An encoding method and apparatus and a decoding method and apparatus are provided. The decoding method includes extracting an arbitrary down-mix signal and compensation information necessary for compensating for the arbitrary down-mix signal from the input bitstream, compensating for the arbitrary down-mix signal using the compensation information, and generating a three-dimensional (3D) down-mix signal by performing a 3D rendering operation on the compensated arbitrary down-mix signal. Accordingly, it is possible to efficiently encode multi-channel signals with 3D effects and to adaptively restore and reproduce audio signals with optimum sound quality according to the characteristics of an audio reproduction environment.03-05-2009
20090060204Audio Spatial Environment Engine - An audio spatial environment engine for converting from an N channel audio system to an M channel audio system, where N is an integer greater than M, is provided. The audio spatial environment engine includes one or more correlators receiving two or more of the N channels of audio data and eliminating delays between the channels that are irrelevant to an average human listener. One or more Hilbert transform systems each perform a Hilbert transform on one or more of the correlated channels of audio data. One or more summers receive at least one of the correlated channels of audio data and at least one of the Hilbert transformed correlated channels of audio data and generate one of the M channels of audio data.03-05-2009
20100232609DEVICE, METHOD, PROGRAM, AND SYSTEM FOR CANCELING CROSSTALK WHEN REPRODUCING SOUND THROUGH PLURALITY OF SPEAKERS ARRANGED AROUND LISTENER - In an audio signal processing device, a signal input part receives a plurality of audio signals to be provided to a plurality of speakers, respectively, arranged so as to surround a listener, the speakers including a center speaker, a left speaker and a right speaker. A signal processing part adds a processed audio signal to an audio signal to be provided to the center speaker, the processed signal being obtained by attenuating a summation of audio signals to be provided to the left speaker and the right speaker. The signal processing part attenuates the summation of the audio signals by an attenuation rate which is set between 0 and 1. The signal processing part sets the attenuation rate to an appropriate value effective to suppress crosstalk between sound emitted from the left speaker and sound emitted from the right speaker.09-16-2010
20110158413APPARATUS AND METHOD FOR A COMPLETE AUDIO SIGNAL - The present invention relates to an apparatus and method for redeeming otherwise closed and concealed information contained in audio signals. An active circuit balances the ratio between in-phase and out-of-phase signals through the application of sum and difference signals and adjusts the ratio of gain in stereophonic signals as well as in monophonic and multichannel signal applications. This includes both the primary reference signal, and a plurality of redundant duplicate signals, substantially identical in all respects to the primary reference signal except in relation to magnitude and phase, for the purpose of unfolding, or opening the audio signal content. A pair of output signal levels approximates the golden ratio where the golden ratio is one plus the square root of five divided by two which gives an irrational number 1.618.06-30-2011
20080247552Method and Device for Actively Correcting the Acoustic Properties of an Acoustic Space Listening Zone - The invention concerns a method and device for actively correcting acoustic properties of a listening zone (10-09-2008
20080232601METHOD AND APPARATUS FOR ENHANCEMENT OF AUDIO RECONSTRUCTION - An audio signal having at least one audio channel and associated direction parameters indicating a direction of origin of a portion of the audio channel with respect to a recording position is reconstructed to derive a reconstructed audio signal. A desired direction of origin with respect to the recording position is selected. The portion of the audio channel is modified for deriving a reconstructed portion of the reconstructed audio signal, wherein the modifying comprises increasing an intensity of the portion of the audio channel having direction parameters indicating a direction of origin close to the desired direction of origin with respect to another portion of the audio channel having direction parameters indicating a direction of origin further away from the desired direction of origin.09-25-2008
20130114816Audio Coupling System - A device for the sharing audio signals. A pair of headphones includes circuitry for connecting to an audio signal input, as is typical, but also for connecting to an audio signal output. The audio output allows a plurality of personal listening devices, for example headphones, to be linked together allowing a plurality of listeners to listen to the same audio signal, yet maintain the utility provided by a headphone listening system05-09-2013
20110222692ADAPTIVE HIGH FIDELITY REPRODUCTION SYSTEM - Audio is adaptively associated with speakers, depending on the speaker configuration that is present. Each speaker it receives an audio assignment based on its individual spectral characteristics. As more speakers are added, content is adaptively associated with that you speaker, and taken away from the previous.09-15-2011
20130182850Circuits and Methods to Reduce Pin Count of a Single Channel Device with a Multi-Channel Serial Interface - A channel selection circuit in a serial audio communication device provides channel selection for insertion or extraction of data to or from a multiplexed serial data stream without the requirement of extra channel selection inputs. The channel selection circuit has multiple counters structured such that each counter represents a channel of the serial data stream. The input of each counter receives one of the multiple synchronizing timing signals. The input of the designated counter receives one timing signal that has the greatest frequency. The remaining counters receive the word select timing signals for determining which channel is being selected. A ready output of each counter is a channel indicator in communication with multiple signal selection circuits for selecting the multiple timing signals to be transferred to a data processing device for inserting or extracting data to or from the multiplexed serial data stream.07-18-2013
20110311057AUDIO STREAM TRANSMISSION APPARATUS, AUDIO STREAM RECEPTION APPARATUS, AND TRANSMITTING AND RECEIVING METHOD THEREOF - A single audio service includes a plurality of audio sources, which may be classified by type. The classified audio sources having a same type may be multiplexed together to form audio streams, which may be amplified to obtain a desired audio environment.12-22-2011
20120033816SIGNAL PROCESSING METHOD, ENCODING APPARATUS USING THE SIGNAL PROCESSING METHOD, DECODING APPARATUS USING THE SIGNAL PROCESSING METHOD, AND INFORMATION STORAGE MEDIUM - Provided is a signal processing method for processing a bitstream, an information storage medium including the bitstream, an encoding apparatus, and a decoding apparatus. The signal processing method includes: receiving a bitstream including additional information; extracting first information which is information associated with extraction of the additional information and is included in at least one of additional bitstream information, a skip field, and auxiliary data bits, which are included in the bitstream; and extracting and decoding the additional information by using the first information.02-09-2012
20130202114Controllable Playback System Offering Hierarchical Playback Options - A first apparatus performs the following: determining, using at least two microphone signals corresponding to left and right microphone signals and using at least one further microphone signal, directional information of the left and right microphone signals; outputting a first signal corresponding to the left microphone signal; outputting a second signal corresponding to the right microphone signal; and outputting a third signal corresponding to the determined directional information. Another apparatus performs the following: performing at least one of the following: outputting first and second signals as stereo output signals; or converting the first and second signals to mid and side signals, and converting, using directional information for the first and second signals, the mid and side signals to at least one of binaural signals or multi-channel signals, and outputting the corresponding binaural signals or multi-channel signals. Additional apparatus, program products, and methods are disclosed.08-08-2013

Patent applications in class BINAURAL AND STEREOPHONIC

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