Class / Patent application number | Description | Number of patent applications / Date published |
381940300 | In multiple frequency bands | 51 |
20080219472 | Noise suppressor - A method of determining noise in an audio stream, the method comprising: acquiring a plurality of consecutive time frames of the audio stream each comprising samples of the audio stream; generating a discrete frequency spectrum for each frame responsive to the frame samples; partitioning the frequency spectrum of each frame into a plurality of same frequency bands; determining an audio energy for each frequency band in each frame; and determining an estimate of noise energy for each frequency band in a temporally last time frame responsive to a relatively small number of smallest values for the audio energy in the frequency band of the plurality of time frames. | 09-11-2008 |
20080232611 | METHOD AND APPARATUS FOR MITIGATING PHASE NOISE - Techniques for mitigating additional phase noise in local oscillator (LO) signals, which may be due to digital noise coupling, are described. A correction signal having an estimate of additional phase noise in an LO signal is derived. The correction signal is applied to a data signal either after downconversion or before upconversion with the LO signal to mitigate the additional phase noise. To derive the correction signal, an input signal having the additional phase noise may be obtained by downconverting a replica LO signal or based on the replica LO signal without downconversion. The input signal may be digitized and filtered to pass a single tone and suppress remaining tones. A replica signal may be derived based on the filtered signal and frequency translated to obtain a phase noise estimate signal at DC. The complex conjugate of the phase noise estimate signal may be provided as the correction signal. | 09-25-2008 |
20080285774 | Howling Suppression Device, Program, Integrated Circuit, and Howling Suppression Method - Howling, which occurs when amplifying a target sound collected by a first microphone through an amplification section and outputting the amplified sound as an intensified sound from a loudspeaker, is suppressed. A first power spectrum is produced according to a first acoustic signal output from the first microphone collecting a sound. A second power spectrum is produced according to a second acoustic signal of a sound including at least the intensified sound and not including the target sound. Then, the first acoustic signal is filtered based on the first power spectrum and the second power spectrum to output only an acoustic signal of the target sound to the amplification section. | 11-20-2008 |
20090016545 | PRE-CONFIGURATION AND CONTROL OF RADIO FREQUENCY NOISE CANCELLATION - A noise-reduction system includes a noise-pattern predictor in communication with a noise-canceling module. In a more specific embodiment, the noise-reduction apparatus further includes an input collector in communication with the noise-pattern predictor. The input collector is coupled to a first module, such as a sensor, that provides information to the noise-pattern predictor to facilitate predicting noise in an accompanying signal environment and to provide a first signal in response thereto. In an illustrative embodiment, the first signal includes information indicating when an ignition system of a vehicle will turn on. The first signal further includes information indicating when a second signal transmitted from a cellular base station will affect noise in the signal environment. The second signal may include a burst in a cellular signal. | 01-15-2009 |
20090028357 | AUDIO TEST APPARATUS CAPABLE OF DECREASING NOISE INFLUENCE IN PROCESS OF AUDIO DEVICE TESTING AND METHOD THEREOF - A audio test method for decreasing noise influence, which includes the following steps: obtaining analog signals; converting the analog signals into digital signals; intercepting digital signals of a first predetermined length and executing a first Fast Fourier Transform (FFT), then obtaining an first Fourier spectrum; recording the amplitudes of frequency values of the first Fourier spectrum; intercepting digital signals of a second predetermined length and executing the second FFT, then obtaining an second Fourier spectrum; recording the amplitudes of the frequency values belonging to odd points of the second frequency spectrum, which are the amplitudes of the noise composition; subtracting the amplitudes of the noise composition from the amplitudes of frequency values of the first Fourier spectrum and obtaining a frequency domain signals without noise composition; executing inverse Fast Flourier Transform (iFFT) for the frequency domain signals and obtaining time domain signals, testing each parameter of the time domain signals. | 01-29-2009 |
20090052692 | SOUND FIELD GENERATOR AND METHOD OF GENERATING SOUND FIELD USING THE SAME - The invention relates to a sound field generator and a method of generating a sound field using the same. More particularly, the invention relates to a sound field generator and a method of generating the same, which can apply a filter in consideration of a masking effect in a time domain to a room impulse response, remove inaudible data depending on a frequency in a signal obtained by multiplying the room impulse response by an input signal in a frequency domain, and remove a signal block having a lower level than a level of a background noise block among output signal blocks to considerably reduce computational complexity required for performing a convolution, making it possible to generate an accurate sound field by minimizing sound quality distortion while implementing a real-time sound field generating system. | 02-26-2009 |
20090060223 | SIGNAL PROCESSING DEVICE, SIGNAL PROCESSING METHOD, AND PROGRAM - A signal processing device includes a sound pickup unit configured to pick up sound and convert the sound into a sound signal; a signal recording unit including an actuator that is driven by a current supplied from a power source and that has a possibility of generating audible noise caused by the driving, the signal recording unit being configured to record the sound signal therein; a current detecting unit configured to detect the magnitude of the current and a temporal change in the current; and a signal processing unit configured to determine, on the basis of at least one of the magnitude of the current and the temporal change in the current, whether the audible noise has been generated and perform, when it is determined that the audible noise has been generated, noise removal processing for removing the audible noise from the sound signal, which contains the audible noise. | 03-05-2009 |
20090323982 | System and method for providing noise suppression utilizing null processing noise subtraction - Systems and methods for noise suppression using noise subtraction processing are provided. The noise subtraction processing comprises receiving at least a primary and a secondary acoustic signal. A desired signal component may be calculated and subtracted from the secondary acoustic signal to obtaining a noise component signal. A determination may be made of a reference energy ratio and a prediction energy ratio. A determination may be made as to whether to adjust the noise component signal based partially on the reference energy ratio and partially on the prediction energy ratio. The noise component signal may be adjusted or frozen based on the determination. The noise component signal may then be removed from the primary acoustic signal to generate a noise subtracted signal which may be outputted. | 12-31-2009 |
20100128897 | SIGNAL PROCESSING DEVICE - A separation signal generation unit generates a plurality of separation signals which are independent from one another from the mixed signals for one frame which are converted into those in a frequency region. A mask processing unit judges a noise condition of a first separation signal for each frequency bin on the basis of the first separation signal and second separation signals. The mask processing unit further removes a first noise component obtained on the basis of a judgment result on the noise condition from the first separation signal. A noise amount measuring unit measures the amount of noise in the first separation signal. A noise signal selection unit selects a noise signal for each frequency bin on the basis of the amount of noise measured by the noise amount measuring unit. A noise removing unit removes a second noise component from a noise removal signal inputted from the mask processing unit. The noise removing unit outputs the noise removal signal obtained by removing the second noise component as a target signal. | 05-27-2010 |
20100260353 | NOISE REDUCING DEVICE AND NOISE DETERMINING METHOD - A noise reducing device includes: a sound-signal input unit that inputs a sound signal; a time-to-frequency converting unit that converts the input sound signal obtained by being input by the sound-signal input unit into a frequency signal; a patterning unit that calculates, for each of divided frequencies of the frequency signal, an nth order polynomial (n is a natural number) as a polynomial for interpolating sampling points and acquires a coefficient pattern including a set of values of coefficients of respective orders of the polynomial; a matching-data storing unit that stores, in association with the divided frequencies, matching data indicating a matching range as a range of a coefficient pattern regarded as noise; and a noise determining unit that determines, on the basis of a result obtained by comparing the coefficient pattern acquired by the patterning unit and the matching range indicated by the matching data, at least presence or absence of noise occurrence at a divided frequency corresponding to data of the compared coefficient pattern. | 10-14-2010 |
20100272289 | METHOD FOR OPERATING A HEARING APPARATUS AND HEARING APPARATUS WITH A FREQUENCY SEPARATING FILTER - A method operates a hearing apparatus. The hearing apparatus contains a frequency separating filter characterized by a threshold frequency, which splits an input signal into a low-frequency signal component and a high-frequency signal component. The hearing apparatus further has a first device, which can be used to set the threshold frequency of the frequency separating filter so that artifacts in an output signal of the hearing apparatus are reduced. | 10-28-2010 |
20110081026 | SUPPRESSING NOISE IN AN AUDIO SIGNAL - An electronic device for suppressing noise in an audio signal is described. The electronic device includes a processor and instructions stored in memory. The electronic device receives an input audio signal and computes an overall noise estimate based on a stationary noise estimate, a non-stationary noise estimate and an excess noise estimate. The electronic device also computes an adaptive factor based on an input Signal-to-Noise Ratio (SNR) and one or more SNR limits. A set of gains is also computed using a spectral expansion gain function. The spectral expansion gain function is based on the overall noise estimate and the adaptive factor. The electronic device also applies the set of gains to the input audio signal to produce a noise-suppressed audio signal and provides the noise-suppressed audio signal. | 04-07-2011 |
20110085677 | ADAPTIVE DYNAMIC RANGE ENHANCEMENT OF AUDIO RECORDINGS - There are provided methods and an apparatus for conditioning an audio signal. According to one aspect of the present invention there is included a method for conditioning an audio signal having the steps of: receiving at least one audio signal, each audio signal having at least one channel, each channel being segmented into a plurality of frames over a series of time; calculating at least one measure of dynamic excursion of the audio signal for a plurality of successive segments of time; filtering the audio signal into a plurality of subbands, each frame being represented by at least one subband; deriving a dynamic gain factor from the successive segments of time; analyzing at least one subband of the frame to determine if a transient exists in the frame; and applying the dynamic gain factor to each frame having a transient. | 04-14-2011 |
20110103615 | Wind Noise Suppression - A method of suppressing wind noise in a voice signal determines an upper frequency limit that lies within the frequency spectrum of the voice signal, and for each of a plurality of frequency bands below the upper frequency limit, compares the average power of signal components in a first portion of the signal to the average power of signal components in a second portion of the signal, where the second portion is successive to the first portion. Signal components are identified in at least one of the plurality of frequency bands as containing impulsive wind noise in dependence on the comparison, and the identified signal components are attenuated. | 05-05-2011 |
20110142256 | METHOD AND APPARATUS FOR REMOVING NOISE FROM INPUT SIGNAL IN NOISY ENVIRONMENT - A method of removing a noise signal from an input signal, the method including receiving a pure noise signal and an input signal including the noise signal; determining whether the pure noise signal is a static noise signal or a non-static noise signal; and removing the noise signal from the input signal according to whether the noise signal is determined to be the static noise signal or the non-static noise signal. | 06-16-2011 |
20110188671 | ADAPTIVE GAIN CONTROL BASED ON SIGNAL-TO-NOISE RATIO FOR NOISE SUPPRESSION - Systems and methods for suppressing noise in a signal are disclosed herein. In exemplary embodiments of the present invention, noise is suppressed using perceptual adaptive gain control based on signal-to-noise ratios. In other embodiment of the present invention, the gain of a signal is mapped as a function of an active estimate of the envelope of the signal. | 08-04-2011 |
20110211711 | Factor setting device and noise suppression apparatus - In a noise suppression apparatus, an index setter sets an exponent K that is a positive value. A factor setter variably sets a suppression factor according to the exponent K. A noise suppressor generates an audio signal from which a noise component is suppressed through noise suppression process of suppressing a Kth power of an amplitude of the noise component at each frequency thereof in a Kth power of an amplitude of the audio signal at each frequency thereof to a degree determined according to the suppression factor set by the factor setting part. Preferably, the index setter sets the exponent K to a value less than 0.1. | 09-01-2011 |
20120020495 | AUDIO SIGNAL PROCESSING APPARATUS, AUDIO SIGNAL PROCESSING METHOD, AND PROGRAM - The present disclosure provides a audio signal processing apparatus including, an amplitude detector configured to detect a noise start point of an audio signal including a noise signal by comparing an amplitude value of the audio signal with a threshold value, a frequency feature calculator configured to calculate a frequency feature representing at least a frequency characteristic of the audio signal after the noise start point, and a noise determiner configured to determine a leg continuously including high-frequency components equal to or higher than a reference frequency in the audio signal after the noise start point as a noise leg based on the frequency feature. | 01-26-2012 |
20120033828 | Signal Processing Method and Apparatus, and Recording Medium in Which a Signal Processing Program is Recorded - A signal processing method for converting a signal received via a transmission path or read from a storage medium into a first audible signal, and suppressing a noise other than a desired signal contained in the first audible signal based on predetermined audio quality adjustment information, comprising steps of: in suppressing a noise other than a desired signal contained in the first audible signal to generate an enhanced signal, receiving audio quality adjustment information for adjusting audio quality; and adjusting audio quality of the enhanced signal using the audio quality adjustment information | 02-09-2012 |
20120082323 | SOUND SIGNAL PROCESSING DEVICE - A sound signal processing device that is capable of suitably extracting main sound from mixed sound in which unnecessary sound (for example, leakage sound and reverberant sound) is mixed with the main sound. More specifically, a mixed sound signal in the time domain including first sound and second sound, and a target sound signal in the time domain including sound corresponding to at least the second sound, which have temporal relation in their entirety or in part, are each divided into a plurality of frequency bands. A level ratio between the two signals is calculated at each frequency. Based on the level ratio, a signal of the first sound that is included in the mixed sound signal is extracted. | 04-05-2012 |
20120106758 | Technique for Suppressing Particular Audio Component - A coefficient train processing section, which sequentially generates per unit segment a processing coefficient train for suppressing a target component of an audio signal, includes a basic coefficient train generation section and coefficient train processing section. The basic coefficient train generation section generates a basic coefficient train where basic coefficient values corresponding to frequencies within a particular frequency band range are each set at a suppression value that suppresses the audio signal while coefficient values corresponding to frequencies outside the particular frequency band range are each set at a pass value that maintains the audio signal. The coefficient train processing section generates the processing coefficient train, per unit segment, by changing, to the pass value, each of the coefficient values corresponding to frequencies other than the target component among the coefficient values corresponding to the frequencies within the particular frequency band range. | 05-03-2012 |
20120128177 | Circular Frequency Translation with Noise Blending - An audio signal is conveyed more efficiently by transmitting or recording a baseband of the signal with an estimated spectral envelope and a noise-blending parameter derived from a measure of the signal's noise-like quality. The signal is reconstructed by translating spectral components of the baseband signal to frequencies outside the baseband, adjusting phase of the regenerated components to maintain phase coherency, adjusting spectral shape according to the estimated spectral envelope, and adding noise according to the noise-blending parameter. Preferably, the transmitted or recorded signal also includes an estimated temporal envelope that is used to adjust the temporal shape of the reconstructed signal. | 05-24-2012 |
20120134509 | NOISE SUPPRESSION APPARATUS, METHOD, AND A STORAGE MEDIUM STORING A NOISE SUPPRESSION PROGRAM - A noise suppression apparatus includes: a conversion unit to convert a recorded sound signal in a time domain into a spectrum in a frequency domain; a setting unit to set a suppression gain indicating a degree of suppression on each spectrum for each frequency spectrum on the basis of a nonstationarity-value variation in time of the respective spectrum; a suppression unit to suppress each of the spectrum on the basis of the suppression gain set by the setting unit for each frequency spectrum; and an inverse conversion unit to perform an inverse conversion to the conversion by the conversion unit on the spectrum having been subjected to the suppression processing by the suppression unit. | 05-31-2012 |
20120140951 | System and Method for Processing an Audio Signal - Systems and methods for audio signal processing are provided. In exemplary embodiments, a filter cascade of complex-valued filters are used to decompose an input audio signal into a plurality of frequency components or sub-band signals. These sub-band signals may be processed for phase alignment, amplitude compensation, and time delay prior to summation of real portions of the sub-band signals to generate a reconstructed audio signal. | 06-07-2012 |
20120207327 | Processing Audio Signals - According to an embodiment, a method of reducing noise in a signal received at a processing stage of an acoustic system includes, at the processing stage identifying at least one frequency which causes a system gain of the acoustic system to be above an average system gain of the acoustic system; providing a noise attenuation factor for reducing noise in the signal for the at least one frequency, the noise attenuation factor for the at least one frequency based on the system gain for that frequency; and applying the noise attenuation factor to a component of the signal at that frequency. | 08-16-2012 |
20120213385 | Enhancing Perceptual Performance of SBR and Related HFR Coding Methods by Adaptive Noise-Floor Addition and Noise Substitution Limiting - The present proposes new methods and an apparatus for enhancement of source coding systems utilising high frequency reconstruction (HFR). It addresses the problem of insufficient noise contents in a reconstructed highband, by Adaptive Noise-floor Addition. It also introduces new methods for enhanced performance by means of limiting unwanted noise, interpolation and smoothing of envelope adjustment amplification factors. The present invention is applicable to both speech coding and natural audio coding systems. | 08-23-2012 |
20120328121 | Reconstructing an Audio Signal By Spectral Component Regeneration and Noise Blending - An audio signal is conveyed more efficiently by transmitting or recording a baseband of the signal with an estimated spectral envelope and a noise-blending parameter derived from a measure of the signal's noise-like quality. The signal is reconstructed by translating spectral components of the baseband signal to frequencies outside the baseband, adjusting phase of the regenerated components to maintain phase coherency, adjusting spectral shape according to the estimated spectral envelope, and adding noise according to the noise-blending parameter. Preferably, the transmitted or recorded signal also includes an estimated temporal envelope that is used to adjust the temporal shape of the reconstructed signal. | 12-27-2012 |
20120328122 | METHOD AND APPARATUS FOR ENCODING AND DECODING NOISE SIGNAL - Provided is a method and apparatus for encoding/decoding an audio signal. Sections which are not used to output noise components near important spectral components and sub-bands which are not used to output noise components, are determined to be encoded or decoded, so that the efficiency of encoding and decoding an audio signal increases, and sound quality can be improved using less bits. | 12-27-2012 |
20130003987 | NOISE SUPPRESSION DEVICE - A band separating unit | 01-03-2013 |
20130163781 | BREATHING NOISE SUPPRESSION FOR AUDIO SIGNALS - Systems and methods are described herein for detecting and suppressing breathing noise in an audio signal. First, systems and methods are described that analyze audio signals generated by two or more microphones to detect breathing noise in one of the audio signals and that leverage the multiple microphones to suppress detected breathing noise in a manner that minimizes signal distortion. Then, systems and methods are described that are capable of analyzing the audio signal generated by a single microphone to detect breathing noise in the audio signal and thereafter suppress it. | 06-27-2013 |
20130182868 | Temporal Interpolation of Adjacent Spectra - Embodiments of the present invention exploit redundancy of succeeding FFT spectra and use this redundancy for computing interpolated temporal supporting points. An analysis filter bank converts overlapped sequences of an audio (ex. loudspeaker) signal from a time domain to a frequency domain to obtain a time series of short-time loudspeaker spectra. An interpolator temporally interpolates this time series. The interpolation is fed to an echo canceller, which computes an estimated echo spectrum. A microphone analysis filter bank converts overlapped sequences of an audio microphone signal from the time domain to the frequency domain to obtain a time series of short-time microphone spectra. The estimated echo spectrum is subtracted from the microphone spectrum. Further signal enhancement (filtration) may be applied. A synthesis filter bank converts the filtered microphone spectra to the time domain to generate an echo compensated audio microphone signal. Computational complexity of signal processing systems can, therefore, be reduced. | 07-18-2013 |
20130202130 | Motion Based Compensation of Uplinked Audio - Embodiments relate to apparatuses for, and methods of, compensating for distance | 08-08-2013 |
20130223645 | SYSTEM AND METHOD FOR DYNAMIC RESIDUAL NOISE SHAPING - A system and method for dynamic residual noise shaping configured to reduce hiss noise in an audio signal. The system and method may detect an amount and type of hiss noise. The system and method may limit calculated noise suppression gains responsive to the detected amount and type of hiss noise. The limited noise suppression gains may be applied to the audio signal and may reduce the hiss noise. | 08-29-2013 |
20140126745 | COMBINED SUPPRESSION OF NOISE, ECHO, AND OUT-OF-LOCATION SIGNALS - A system, a method, logic embodied in a computer-readable medium, and a computer-readable medium comprising instructions that when executed carry out a method. The method processes: (a) a plurality of input signals, e.g., signals from a plurality of spatially separated microphones; and, for echo suppression, (b) one or more reference signals, e.g., signals from or to be rendered by one or more loudspeakers and that can cause echoes. The method processes the input signals and one or more reference signals to carry out in an integrated manner simultaneous noise suppression and out-of-location signal suppression, and in some versions, echo suppression. | 05-08-2014 |
20140193000 | METHOD AND APPARATUS FOR GENERATING A NOISE REDUCED AUDIO SIGNAL USING A MICROPHONE ARRAY - A method and apparatus for generating a noise reduced output signal from sound received by a first and second microphone arranged as a microphone array. The method includes transforming sound received by the first microphone into a first input signal and sound received by a second microphone into a second input signal and calculating, for each of the frequency components, a weighted sum of at least two intermediate signals calculated from the input signals by means of complex valued transfer functions and real valued Equalizer functions. The method includes a weighing function with range between zero and one, with quotients of signal energies of the intermediate functions as arguments of the weighing function, and generating the noise reduced output signal based on the weighted sum of the intermediate functions and based on the weighted sum of the first and second intermediate function at each of the frequency components. | 07-10-2014 |
20140211966 | Noise Estimation Control System - A noise estimation control system may limit increases of a stored background noise estimate in response to a detected noise feedback situation. The system receives an input audio signal detected within a space, and a reference audio signal that is transmitted by a speaker as an aural signal into the space. A signal processor processes the input audio signal and the reference audio signal to determine a coherence value based on an amount of the aural signal that is included in the input audio signal. The signal processor also calculates an amount to adjust the stored background noise estimate based on the coherence value and a determined background noise level of the input audio signal. | 07-31-2014 |
20140233758 | FREQUENCY DOMAIN NOISE CANCELLATION WITH A DESIRED NULL BASED ACOUSTIC DEVICES, SYSTEMS, AND METHODS - Frequency domain signal extraction methods and apparatuses include receiving a reference signal, which contains mostly undesired audio and is substantially void of desired audio. The reference signal is decomposed into at least two reference frequency components. Filtering the at least two reference frequency components with at least two adaptive filters to form at least two filtered reference frequency components. The filtered reference frequency components are recombined in an IFFT component, to produce a filtered reference signal. A delayed signal is input to an adder. The delayed signal contains desired audio and undesired audio. The filtered reference signal is subtracted from the delayed signal to form an output signal containing desired audio. The output signal is decomposed into at least two frequency components. The filtering is adapted with the at least two frequency components. The filtering is inhibited intermittently with the at least two adaptive filters to prevent cancellation of the desired audio. In some implementations, frequency sub-bands are employed. In some implementations, an acoustic element with a Cardioid beam pattern is used to acquire the reference signal. | 08-21-2014 |
20140294199 | SIGNAL ANALYSIS APPARATUS AND SIGNAL ANALYSIS METHOD - To provide a signal analysis apparatus and a signal analysis method which can expand a dynamic range. A spectrum analyzer | 10-02-2014 |
20150030181 | FREQUENCY CHARACTERISTIC MODIFICATION DEVICE - A device includes a HPF | 01-29-2015 |
20160027451 | System and Method for Providing Noise Suppression Utilizing Null Processing Noise Subtraction - Systems and methods for noise suppression using noise subtraction processing are provided. The noise subtraction processing comprises receiving at least a primary and a secondary acoustic signal. A desired signal component may be calculated and subtracted from the secondary acoustic signal to obtain a noise component signal. A determination may be made of a reference energy ratio and a prediction energy ratio. A determination may be made as to whether to adjust the noise component signal based partially on the reference energy ratio and partially on the prediction energy ratio. The noise component signal may be adjusted or frozen based on the determination. The noise component signal may then be removed from the primary acoustic signal to generate a noise subtracted signal which may be outputted. | 01-28-2016 |
20160035362 | METHOD AND APPARATUS FOR ENCODING AND DECODING NOISE SIGNAL - Provided is a method and apparatus for encoding/decoding an audio signal. Sections which are not used to output noise components near important spectral components and sub-bands which are not used to output noise components, are determined to be encoded or decoded, so that the efficiency of encoding and decoding an audio signal increases, and sound quality can be improved using less bits. | 02-04-2016 |
20160072467 | Frequency Band Compression With Dynamic Thresholds - Disclosed are examples of systems, apparatus, methods and computer-readable storage media for dynamically adjusting thresholds of a compressor. An input audio signal having a number of frequency band components is processed. Time-varying thresholds can be determined. A compressor performs, on each frequency band component, a compression operation having a corresponding time-varying threshold to produce gains. Each gain is applied to a delayed corresponding frequency band component to produce processed band components, which are summed to produce an output signal. In some implementations, a time-varying estimate of a perceived spectrum of the output signal and a time-varying estimate of a distortion spectrum induced by the perceived spectrum estimate are determined, for example, using a distortion audibility model. An audibility measure of the distortion spectrum estimate in the presence of the perceived spectrum estimate can be predicted and used to adjust the time-varying thresholds. | 03-10-2016 |
20160111110 | AUDIO SYSTEM - An audio system is described including an audio processor, an amplifier and a speaker and a distortion estimator. The distortion estimator calculates at least one of an expected response of the amplifier to an audio signal and an expected response of the loudspeaker to an audio signal. The distortion estimator is operable to generate a distortion prediction signal determined by a difference between an expected non-linear response of at least one of the loudspeaker and the amplifier and an expected linear response of at least one of the loudspeaker and the amplifier. A controller coupled to the audio processor and a control input of the audio processor may vary the operating parameters of the audio processor depending on the estimated distortion. | 04-21-2016 |
20160127825 | EARHOLE-WEARABLE SOUND COLLECTION DEVICE, SIGNAL PROCESSING DEVICE, AND SOUND COLLECTION METHOD - The present technique relates to an earhole-wearable sound collection device, a signal processing device, and a sound collection method for realizing sound collection at a high S/N ratio, with noise influence being reduced not by a noise reduction process. | 05-05-2016 |
20160142820 | PERSONAL AUDIO SYSTEM USING PROCESSING PARAMETERS LEARNED FROM USER FEEDBACK - Learning personal audio systems and methods are disclosed. A learning personal audio system characterizes the digitized ambient sound so as to generate feature data for the digitized ambient sound, instructs a network interface to transmit the feature data to the remote server, requests one or more appropriate sound profiles from the remote server based upon the feature data, receives one or more selected sound profiles, selected by the remote server based upon the feature data, and initiates processing of the digitized ambient sound based upon the one or more selected sound profiles received from the remote server to generate digitized processed sound. The one or more selected sound profiles for the learning personal audio system are based upon sound profiles which are manually selected by a plurality of other users of personal audio systems similar to the learning personal audio system. | 05-19-2016 |
20160173986 | ULTRA-LOW DISTORTION INTEGRATED LOUDSPEAKER SYSTEM | 06-16-2016 |
20160180826 | SYSTEM AND METHOD FOR WIND DETECTION AND SUPPRESSION | 06-23-2016 |
20160196819 | SYSTEM AND METHOD FOR ADAPTIVE ACTIVE NOISE REDUCTION | 07-07-2016 |
20160379614 | NOISE SUPPRESSION DEVICE AND METHOD OF NOISE SUPPRESSION - A noise suppression device includes a memory, and a processor coupled to the memory and configured to generate a first input signal and a second input signal by converting a first sound signal and a second sound signal from time domain to frequency domain, the first sound signal and the second sound signal being collected by a first microphone and a second microphone, respectively, based on the first input signal and the second input signal, determine a stationary noise model, calculate a signal to noise ratio (SNR) based on the first input signal and the stationary noise model, based on the SNR ratio, set a range of phase difference to suppress the first input signal, calculate a phase difference between the first input signal and the second input signal, and when the phase difference is within the range of phase difference, suppress the first input signal. | 12-29-2016 |
20160379664 | SOUND PROCESSING DEVICE AND METHOD - A sound processing device is provided. The sound processing device includes a microphone array and a post filtering module. The microphone array includes microphones aiming to different directions and configured for receiving sound signals. The post filtering module is configured for receiving the sound signals from the microphone array, filtering the sound signals to generate groups of filtered signals each corresponding to one of the sound signals, wherein each of the filtered signals within a group corresponds to one of different frequency bands, generating band signals each based on a comparison of an intensity of one of the filtered signals that corresponds to the same one of the frequency bands in each group of the filtered signals and a noise intensity correlation between the frequency bands and adding the band signals to generate an output sound signal. | 12-29-2016 |
20170236529 | AUDIO SIGNAL PROCESSING DEVICE, AUDIO SIGNAL PROCESSING METHOD, AND AUDIO SIGNAL PROCESSING PROGRAM | 08-17-2017 |