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Class 704/228 - Post-transmission


Subclass of Class 704 - Data processing: speech signal processing, linguistics, language translation, and audio compression/decompression
Definition: Subject matter wherein decoding after transmission minimizes
No. of patents: 385
Last issue date: 05/22/2012


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NumberTitleIssue Date
8185388Apparatus for improving packet loss, frame erasure, or jitter concealment
The invention presents a method to improve the recovering from packet loss, frame erasure or jitter concealment during signal communication, especially for VoIP (Voice Over Internet Protocol) applications. A variable delay concept (instead of constant delay) is intr...
05/22/2012
8160874Speech frame loss compensation using non-cyclic-pulse-suppressed version of previous frame excitation as synthesis filter source
An audio decoding device performs frame loss compensation capable of obtaining a decoded audio which is natural for ears with little noise. The audio decoding device includes a non-cyclic pulse waveform detection unit for detecting a non-cyclic pulse waveform sectio...
04/17/2012
8145480Method and apparatus for implementing speech decoding in speech decoder field of the invention
The present disclosure relates to a decoding method and apparatus. The method includes: receiving data frames from the coder; if any erroneous frame appears, calculating a pitch lag parameter of the erroneous frame; decoding the data frames according to the calculat...
03/27/2012
8126709Broadband frequency translation for high frequency regeneration
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 translatin...
02/28/2012
8041562Constrained and controlled decoding after packet loss
A technique is described herein for reducing audible artifacts in an audio output signal generated by decoding a received frame in a series of frames representing an encoded audio signal in a predictive coding system. In accordance with the technique, it is determin...
10/18/2011
8032365Method and apparatus for controlling echo in the coded domain
A method and corresponding apparatus for coded-domain acoustic echo control is presented. An echo control problem is considered as that of perceptually matching an echo signal to a reference signal. A perceptual similarity function that is based on the coded spectra...
10/04/2011
8032366Method and apparatus for low bit rate speech coding detection
To increase channel capacity, mobile phone carriers have deployed speech coders, such as Advanced MultiBand Excitation coding (AMBE), in networks to reduce the bit rate of each call. One undesired consequence of employing such speech coders is that the voice quality...
10/04/2011
8005670Audio glitch reduction
To reduce audio glitch rendering buffer of an audio application is pre-filled with natural sounding audio rather than zeros. For every frame of audio sent for rendering, the rendering buffer is also pre-filled or the signal is stretched in the buffer in anticipation...
08/23/2011
7983908Noise-canceling device for voice communication terminal using configurable multiple digital filters
A noise-canceling device of a voice communication terminal that removes noise elements included in received voice signals. The device comprises: a digital filter array that exhibits filter qualities in response to a coefficient setting signal showing each supplied a...
07/19/2011
7962335Robust decoder
Techniques and tools related to delayed or lost coded audio information are described. For example, a concealment technique for one or more missing frames is selected based on one or more factors that include a classification of each of one or more available frames ...
06/14/2011
7949523Apparatus, method, and computer program product for processing voice in speech
A speech processing apparatus includes a rule storing unit that stores therein a rule that correlates one another causes of errors in speech recognition, responding methods each of which is used when an error has occurred during the speech recognition, and respondin...
05/24/2011
7930176Packet loss concealment for block-independent speech codecs
A technique for performing frame erasure concealment (FEC) in a speech decoder. One or more non-erased frames of a speech signal are decoded in a block-independent manner. When an erased frame is detected, a short-term predictive filter and a long-term predictive fi...
04/19/2011
7925503Method and apparatus for dynamically providing comfort noise
A method and apparatus for dynamically enabling the activation and deactivation of comfort noise over a VoIP media path or channel are disclosed. The present method detects all sound levels in the media path and only activates the comfort noise in the absence of sou...
04/12/2011
7908140Method and apparatus for performing packet loss or frame erasure concealment
The invention concerns a method and apparatus for performing packet loss or Frame Erasure Concealment (FEC) for a speech coder that does not have a built-in or standard FEC process. A receiver with a decoder receives encoded frames of compressed speech information t...
03/15/2011
7873515System and method for error reconstruction of streaming audio information
A method includes receiving a sequence of frames containing audio information and determining that a frame is missing in the sequence of frames. The method also includes comparing the frame that precedes the missing frame to the received frames to identify a selecte...
01/18/2011
7856355Speech quality assessment method and system
In one embodiment, distortion in a received speech signal is estimated using at least one model trained based on subjective quality assessment data. A speech quality assessment for the received speech signal is then determined based on the estimated distortion. ...
12/21/2010
7844453Robust noise estimation
An enhancement system improves the estimate of noise from a received signal. The system includes a spectrum monitor that divides a portion of the signal at more than one frequency resolution. Adaptation logic derives a noise adaptation factor of the received signal....
11/30/2010
7831421Robust decoder
Techniques and tools related to delayed or lost coded audio information are described. For example, a concealment technique for one or more missing frames is selected based on one or more factors that include a classification of each of one or more available frames ...
11/09/2010
7827030Error management in an audio processing system
An audio processing system includes a voice decoder and an audio processor. In one exemplary embodiment, the audio processing system is embedded in a headset unit that is wirelessly coupled to a game console. The voice decoder is used to decode a stream of incoming ...
11/02/2010
7809559Method and apparatus for removing from an audio signal periodic noise pulses representable as signals combined by convolution
A method for removing periodic noise pulses from a continuous audio signal generated in a pressurized air delivery system includes the steps of: detecting, in a time-windowed segment of the continuous audio signal generated in the pressurized air delivery system, a ...
10/05/2010
7805297Classification-based frame loss concealment for audio signals
A system and method for performing frame loss concealment (FLC) when portions of a bit stream representing an audio signal are lost within the context of a digital communication system. The system and method utilizes a plurality of different FLC techniques, wherein ...
09/28/2010
7783482Method and apparatus for enhancing voice intelligibility in voice-over-IP network applications with late arriving packets
A method and apparatus for enhancing voice intelligibility for network communications of speech such as, for example, VoIP (Voice-Over-Internet-Protocol), in the presence of packets which arrive too late for normal playout. When a late speech packet is received by a...
08/24/2010
7778829Real time monitoring and control for audio devices
Various embodiments are disclosed relating to the real-time monitoring and control for audio devices. An apparatus may include a peripheral audio device configured to operate in an operational mode or a debug mode, the peripheral audio device including an audio enha...
08/17/2010
7729907Apparatus and method for preventing senility
Preparing for the full-fledged aged society, measures to prevent senility are required. Senility is prevented by extracting signals of prescribed bands from a speech signal using a first bandpass filter section having a plurality of bandpass filters, extracting the ...
06/01/2010
7707031Large scale measurement of subjective quality in mobile communications systems
Large scale subjective signal quality measurements for a mobile radio communications system are made using a large number of handheld subscriber radio communication units moving at various positions in the mobile radio communications system. Each handheld subscriber...
04/27/2010
7668714Method and apparatus for dynamically providing comfort noise
A method and apparatus for dynamically enabling the activation and deactivation of comfort noise over a VoIP media path or channel are disclosed. The present method detects all sound levels in the media path and only activates the comfort noise in the absence of sou...
02/23/2010
7660714Noise suppression device
A noise suppression device comprises subband SN ratio calculation means which receives a noise likeness signal, an input signal spectrum and a subband-based estimated noise spectrum, calculates the subband-based input signal average spectrum, calculates a subband-ba...
02/09/2010
7624009Method and system for producing variable length context models
Various embodiments of the present invention provide methods and systems for determining, representing, and using variable-length contexts in a variety of different computational applications. In one embodiment of the present invention, a balanced tree is used to re...
11/24/2009
7617099Noise suppression by two-channel tandem spectrum modification for speech signal in an automobile
Techniques for suppressing noise from a signal comprised of speech plus noise. A first signal detector (e.g., a microphone) provides a first signal comprised of a desired component plus an undesired component. A second signal detector (e.g., a sensor) provides a sec...
11/10/2009
7593851Precision piecewise polynomial approximation for Ephraim-Malah filter
Precision piecewise polynomial approximation for Ephraim-Malah filter is described herein. In one embodiment, an exemplary process includes computing a first parameter based on Wiener filter weights and posterior signal-to-noise (SNR) via a polynomial approximation ...
09/22/2009
7590531Robust decoder
Techniques and tools related to delayed or lost coded audio information are described. For example, a concealment technique for one or more missing frames is selected based on one or more factors that include a classification of each of one or more available frames ...
09/15/2009
7562013Method for recovering target speech based on amplitude distributions of separated signals
The present invention provides a method for recovering target speech based on shapes of amplitude distributions of split spectra obtained by use of blind signal separation. This method includes: a first step of receiving target speech emitted from a sound source and...
07/14/2009
7512535Adaptive postfiltering methods and systems for decoding speech
A filter controller processes a decoded speech (DS) signal. The DS signal has a spectral envelope including a first plurality of formant peaks having different respective amplitudes. The controller produces, from the DS signal, a spectrally-flattened DS signal that ...
03/31/2009
7509255Apparatuses for adaptively controlling processing of speech signal and adaptively communicating speech in accordance with conditions of transmitting apparatus side and radio wave and methods thereof
An apparatus for processing a speech signal includes a receiver, a speech signal decoder, a speech rate conversion information detector, and a speech rate converting processor. The receiver receives multiplexed signal of information concerning controls and programs,...
03/24/2009
7502735Speech signal transmission apparatus and method that multiplex and packetize coded information
A speech signal transmission apparatus multiplexes, packetizes, and sends first coded information coded in a normal state and second coded information used for improving the quality of decoded speech when a frame loss occurs. A first error calculating section calcul...
03/10/2009
7499856Estimation method and apparatus of overall conversational quality taking into account the interaction between quality factors
The delay time and listening quality of a system under test are measured from a signal received therefrom, then the measured delay time and listening quality are transformed to a delay-related degradation and a listening quality degradation on the same quality measu...
03/03/2009
7496507Digitized audio data reproduction apparatus, and integrated circuit device to output audio signals
An audio data reproduction apparatus, integrated circuit device, and computer program product configured to implement a method for reproducing audio data that includes receiving an audio stream, decoding the audio stream, processing the audio stream or a signal prod...
02/24/2009
7478040Method for adaptive filtering
A method for adaptive long-term filtering of an audio signal, such as a decoded speech signal. The method includes measuring a smoothed periodicity of an audio signal segment, such as an audio frame, wherein the smoothed periodicity is measured by low-pass filtering...
01/13/2009
7454333Separating multiple audio signals recorded as a single mixed signal
A method according to the invention separates multiple audio signals recorded as a mixed signal via a single channel. The mixed signal is A/D converted and sampled. A sliding window is applied to the samples to obtain frames. The logarithms of the power spectra of t...
11/18/2008
7447630Method and apparatus for multi-sensory speech enhancement
A method and system use an alternative sensor signal received from a sensor other than an air conduction microphone to estimate a clean speech value. The estimation uses either the alternative sensor signal alone, or in conjunction with the air conduction microphone...
11/04/2008
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