| Patents for G10L 19 - Speech or audio signal analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis (31,960) |
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| 06/01/1999 | US5909664 Method and apparatus for encoding and decoding audio information representing three-dimensional sound fields |
| 06/01/1999 | US5909663 Speech decoding method and apparatus for selecting random noise codevectors as excitation signals for an unvoiced speech frame |
| 06/01/1999 | US5909662 Speech processing coder, decoder and command recognizer |
| 06/01/1999 | US5909518 System and method for performing wavelet-like and inverse wavelet-like transformations of digital data |
| 06/01/1999 | CA2156593C Postfilter and method of postfiltering |
| 05/28/1999 | CA2248514A1 Speech playback speed change using wavelet coding, preferably sub-band coding |
| 05/26/1999 | EP0918415A2 System for transmitting digital data, especially speech, over a radio link |
| 05/26/1999 | EP0918407A2 Scalable stereo audio encoding/decoding method and apparatus |
| 05/26/1999 | EP0918401A2 Scalable audio encoding/decoding method and apparatus |
| 05/26/1999 | EP0918400A2 Method for decoding coefficients of quantization per subband using a compressed table |
| 05/26/1999 | EP0917710A1 Method and apparatus for searching an excitation codebook in a code excited linear prediction (clep) coder |
| 05/26/1999 | EP0917709A1 Speech coding |
| 05/26/1999 | CN1217860A Method and apparatus for compressing and transmitting high-speed data |
| 05/25/1999 | US5907822 Loss tolerant speech decoder for telecommunications |
| 05/19/1999 | EP0916192A1 Methods and apparatus for generating noise signals from speech signals |
| 05/18/1999 | US5905970 Speech coding device for estimating an error of power envelopes of synthetic and input speech signals |
| 05/18/1999 | CA2090159C Method and apparatus for coding audio signals based on perceptual model |
| 05/14/1999 | WO1999022561A2 A method and apparatus for audio representation of speech that has been encoded according to the lpc principle, through adding noise to constituent signals therein |
| 05/14/1999 | WO1999001948A3 Method and device for signal coding |
| 05/12/1999 | EP0801790B1 Speech coding method using synthesis analysis |
| 05/12/1999 | EP0624275B1 Method and system for the arrangement of vocoder data for the masking of transmission channel induced errors |
| 05/11/1999 | US5903872 Frame-based audio coding with additional filterbank to attenuate spectral splatter at frame boundaries |
| 05/11/1999 | US5903866 Waveform interpolation speech coding using splines |
| 05/11/1999 | US5903862 Method and apparatus for detection of tandem vocoding to modify vocoder filtering |
| 05/11/1999 | US5903853 Radio transceiver including noise suppressor |
| 05/11/1999 | CA2138818C Voice activity detection driven noise remediator |
| 05/11/1999 | CA2129161C Comb filter speech coding with preselected excitation code vectors |
| 05/06/1999 | WO1999022451A2 Methods and devices for encoding audio signals and methods and devices for decoding a bit stream |
| 05/06/1999 | WO1999022366A2 Improved audio reproduction arrangement and telephone terminal |
| 05/06/1999 | WO1999022365A1 Perceptual subband audio coding using adaptive multitype sparse vector quantization, and signal saturation scaler |
| 05/06/1999 | EP0913952A2 Technique for embedding a code in an audio signal and for detecting the embedded code |
| 05/06/1999 | EP0913951A2 Method for suppressing narrow-band, fixed-frequency interference in an audio signal |
| 05/06/1999 | CA2523773A1 Perceptual subband audio coding using adaptive multitype sparse vector quantization, and signal saturation scaler |
| 05/05/1999 | CN1216178A Data compression/expansion on plurality of digital information signals |
| 05/04/1999 | US5901234 Encoding method for encoding an acoustic signal |
| 05/04/1999 | US5901178 Post-compression hidden data transport for video |
| 05/04/1999 | US5899974 Compressing speech into a digital format |
| 05/04/1999 | US5899970 Method and apparatus for encoding digital signal method and apparatus for decoding digital signal, and recording medium for encoded signals |
| 05/04/1999 | US5899969 Method for signal processing |
| 05/04/1999 | US5899968 Speech coding method using synthesis analysis using iterative calculation of excitation weights |
| 05/04/1999 | US5899967 Speech decoding device to update the synthesis postfilter and prefilter during unvoiced speech or noise |
| 05/04/1999 | US5899966 Speech decoding method and apparatus to control the reproduction speed by changing the number of transform coefficients |
| 04/29/1999 | WO1999021371A1 Frame-based audio coding with gain-control words |
| 04/29/1999 | WO1999021368A1 Apparatus and method for partial buffering transmitted data to provide robust error recovery in a lossy transmission environment |
| 04/29/1999 | WO1999021286A1 Apparatus and method for localizing transmission errors to provide robust error recovery in a lossy transmission environment |
| 04/29/1999 | WO1999021187A1 Frame-based audio coding with additional filterbank to attenuate spectral splatter at frame boundaries |
| 04/29/1999 | WO1999021185A1 Frame-based audio coding with additional filterbank to suppress aliasing artifacts at frame boundaries |
| 04/29/1999 | WO1999021174A1 Sound encoder and sound decoder |
| 04/29/1999 | WO1999021173A1 Signal processing |
| 04/29/1999 | WO1999021167A1 Background noise contrast reduction for handovers involving a change of speech codec |
| 04/29/1999 | WO1999021125A1 Apparatus and method for recovery of quantization codes in a lossy transmission environment |
| 04/29/1999 | WO1999021090A1 Apparatus and method for providing robust error recovery for errors that occur in a lossy transmission environment |
| 04/29/1999 | DE19747132A1 Audio signal coding method |
| 04/29/1999 | DE19747119A1 Audio signal coding and decoding method |
| 04/29/1999 | CA2684452A1 Multi-stage vector quantization for speech encoding |
| 04/29/1999 | CA2684379A1 A speech coder using an orthogonal search and an orthogonal search method |
| 04/28/1999 | EP0911807A2 Sound synthesizing method and apparatus, and sound band expanding method and apparatus |
| 04/28/1999 | EP0910928A1 Coding and decoding of audio signals by using intensity stereo and prediction processes |
| 04/28/1999 | EP0910927A1 Process for coding and decoding stereophonic spectral values |
| 04/28/1999 | EP0910900A1 A method of coding and decoding audio signals |
| 04/28/1999 | CN1215490A Method and arrangement for reconstruction of received speech signal |
| 04/27/1999 | US5898605 Apparatus and method for simplified analog signal record and playback |
| 04/27/1999 | US5897615 Speech packet transmission system |
| 04/27/1999 | CA2055576C Signal processing circuit for the european digital cellular radiotelephone system |
| 04/22/1999 | WO1999020021A2 Speech transmission between terminals in different networks |
| 04/21/1999 | EP0910067A1 Audio signal coding and decoding methods and audio signal coder and decoder |
| 04/21/1999 | EP0910066A2 Coding method and apparatus, and decoding method and apparatus |
| 04/21/1999 | EP0910064A2 Speech parameter coding method and apparatus |
| 04/21/1999 | EP0910063A2 Speech parameter coding method and apparatus |
| 04/21/1999 | EP0909443A1 Method and system for coding human speech for subsequent reproduction thereof |
| 04/21/1999 | EP0726020A4 Method of facilitating an audio source change in a digital radio communication system |
| 04/20/1999 | US5896099 Audio decoder with buffer fullness control |
| 04/20/1999 | CA2141316C Method and apparatus for reducing an undesirable characteristic of a spectral estimate of a noise signal between occurrences of voice signals |
| 04/15/1999 | WO1999018673A1 Method and device for limiting a stream of audio data with a scaleable bit rate |
| 04/15/1999 | WO1999018565A2 Speech coding |
| 04/14/1999 | EP0908023A1 Communication protocol for spread spectrum wireless communication system |
| 04/14/1999 | EP0873614A4 Post-compression hidden data transport |
| 04/13/1999 | CA2126953C Dual port interface for a computer-based multifunction personal communication system |
| 04/08/1999 | WO1999017279A1 A method of encoding a speech signal |
| 04/08/1999 | DE19743711A1 Digitalized speech transmission system over short wave radio path |
| 04/08/1999 | DE19743662A1 Bit rate scalable audio data stream generation method |
| 04/08/1999 | DE19743368A1 Speech signal recording and reproduction device |
| 04/07/1999 | EP0907258A2 Audio signal compression, speech signal compression and speech recognition |
| 04/07/1999 | EP0906664A1 Speech transmission system |
| 04/07/1999 | EP0906613A1 Method and device for coding an audio signal by "forward" and "backward" lpc analysis |
| 04/07/1999 | CN1213242A Method for recording digital sound signal and telephone transponder |
| 04/07/1999 | CN1213135A High quality audio encoding/decoding apparatus and digital versatile disc |
| 04/07/1999 | CN1213107A Memory allocation for real-time audio processing |
| 04/06/1999 | US5893067 Method and apparatus for echo data hiding in audio signals |
| 04/06/1999 | US5893066 Fast requantization apparatus and method for MPEG audio decoding |
| 04/06/1999 | US5893065 Apparatus for compressing audio data |
| 04/06/1999 | US5893061 Method of synthesizing a block of a speech signal in a celp-type coder |
| 04/06/1999 | US5893060 Method and device for eradicating instability due to periodic signals in analysis-by-synthesis speech codecs |
| 04/06/1999 | US5893056 Methods and apparatus for generating noise signals from speech signals |
| 04/06/1999 | US5892693 Signal interpolation and decimation exploiting filter symmetry |
| 04/01/1999 | WO1999016075A1 Audio-player and method for controlling audio data using said audio-player |
| 04/01/1999 | WO1999016050A1 Scalable and embedded codec for speech and audio signals |
| 04/01/1999 | WO1999003097A3 Transmitter with an improved speech encoder and decoder |
| 04/01/1999 | DE19741503A1 Audio-Player und Verfahren zur Steuerung von Audio-Daten durch den Audio-Player Audio player and method for controlling audio data by the audio player |
| 03/31/1999 | EP0905954A2 Telephone answering machine and method for recording a digital audio signal |