Patents
Sitemap › G10 - Musical instruments; Acoustics › G10L - Speech analysis or synthesis; Speech recognition; Speech or voice processing; Speech or audio coding or decoding › 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
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)
11/1999
11/10/1999CN1234897A Method and device for coding discrete signals or for decoding coded discrete signals
11/10/1999CN1234896A Information decorder and decoding method, information encoder and encoding method and distribution medium
11/09/1999US5983192 Audio processor
11/09/1999US5983175 Audio coding method
11/09/1999US5983173 Envelope-invariant speech coding based on sinusoidal analysis of LPC residuals and with pitch conversion of voiced speech
11/09/1999US5983172 Method for coding/decoding, coding/decoding device, and videoconferencing apparatus using such device
11/09/1999US5982830 Hysteretic synchronization system for MPEG audio frame decoder
11/09/1999US5982817 Transmission system utilizing different coding principles
11/09/1999US5982447 System and method for combining two data streams while maintaining the continuous phase throughout the combined data stream
11/09/1999CA2127483C Speech signal encoding system capable of transmitting a speech signal at a low bit rate without carrying out a large volume of calculation
11/04/1999WO1999056470A1 Method and apparatus for decoding an audio signal
11/04/1999WO1999056456A2 Alternating speech and data transmission in digital communications systems
11/04/1999WO1999056214A1 Multimedia analysis in intelligent video system
11/04/1999CA2327082A1 Alternating speech and data transmission in digital communications systems
11/03/1999EP0954190A2 Voice processing for a mobile communication system
11/03/1999EP0953969A1 Method for rendering speech with silence regulation
11/03/1999EP0953966A2 Modem voice/data mode switching arrangement.
11/03/1999EP0655161B1 Lost frame concealment
11/03/1999EP0655160B1 Transmission error concealment
11/03/1999CN1233922A Mobile transmission system
11/02/1999US5978765 Voice generation control apparatus
11/02/1999US5978762 Digitally encoded machine readable storage media using adaptive bit allocation in frequency, time and over multiple channels
11/02/1999US5978761 Method and arrangement for producing comfort noise in a linear predictive speech decoder
11/02/1999US5978760 Method and system for improved discontinuous speech transmission
11/02/1999US5978758 Vector quantizer with first quantization using input and base vectors and second quantization using input vector and first quantization output
11/02/1999US5978756 Encoding audio signals using precomputed silence
11/02/1999CA2156000C Frame erasure or packet loss compensation method
10/1999
10/28/1999WO1999054997A1 Method for converting the scanning rate
10/28/1999WO1999054870A1 Recording/reproducing apparatus
10/28/1999WO1999054801A2 Method and apparatus of supporting an audio protocol in a network
10/28/1999CA2329414A1 Method and apparatus of supporting an audio protocol in a network
10/27/1999EP0952572A2 Vector quantization apparatus and vector quantization method
10/27/1999EP0697124B1 Vector coding process, especially for voice signals
10/27/1999CN1233380A Method for transmitting multiresolution audio signals in a radio frequency communication system
10/27/1999CN1233338A System and methods for communicating desired audio information over a communications medium
10/26/1999US5974380 Multi-channel audio decoder
10/26/1999US5974379 Methods and apparatus for gain controlling waveform elements ahead of an attack portion and waveform elements of a release portion
10/26/1999US5974378 Multi-stage vector quantization with efficient codebook search
10/26/1999US5974377 Analysis-by-synthesis speech coding method with open-loop and closed-loop search of a long-term prediction delay
10/26/1999US5974376 Method for transmitting multiresolution audio signals in a radio frequency communication system as determined upon request by the code-rate selector
10/26/1999US5974375 Coding device and decoding device of speech signal, coding method and decoding method
10/26/1999US5974374 Voice coding/decoding system including short and long term predictive filters for outputting a predetermined signal as a voice signal in a silence period
10/26/1999US5973629 Differential PCM system with frame word length responsive to magnitude
10/21/1999WO1999053677A2 Lossless encoding/decoding in a transmission system
10/21/1999WO1999053479A1 Fast frame optimisation in an audio encoder
10/21/1999WO1999052611A1 Device and method for continuously shuffling cards
10/21/1999WO1999046914A3 Communication device and method of operation
10/21/1999WO1999046764A3 Speech coding
10/21/1999WO1999041736A3 A system and method for providing split vector quantization data coding
10/20/1999EP0950238A1 Speech synthesis system
10/20/1999EP0749626B1 Speech coding method using linear prediction and algebraic code excitation
10/19/1999US5970461 System, method and computer readable medium of efficiently decoding an AC-3 bitstream by precalculating computationally expensive values to be used in the decoding algorithm
10/19/1999US5970445 Speech recognition using equal division quantization
10/19/1999US5970444 Speech coding method
10/19/1999US5970443 Audio encoding and decoding system realizing vector quantization using code book in communication system
10/19/1999US5970442 Gain quantization in analysis-by-synthesis linear predicted speech coding using linear intercodebook logarithmic gain prediction
10/19/1999US5970440 Method and device for short-time Fourier-converting and resynthesizing a speech signal, used as a vehicle for manipulating duration or pitch
10/19/1999US5968199 High performance error control decoder
10/14/1999WO1999052326A1 Low bit-rate spatial coding method and system
10/14/1999WO1999052283A1 Synchronizing, switching and editing mpeg files
10/14/1999WO1999052211A1 Convolutive blind source separation using a multiple decorrelation method
10/14/1999WO1999042932A3 Computer-based patient record and message delivery system
10/14/1999CA2327620A1 Synchronizing, switching and editing mpeg files
10/13/1999EP0949763A2 Digital transmission system for transmitting scale factors
10/13/1999EP0948787A1 Improved audio reproduction arrangement and telephone terminal
10/13/1999EP0856185A4 Repetitive sound compression system
10/12/1999US5966689 Adaptive filter and filtering method for low bit rate coding
10/12/1999US5966688 Speech mode based multi-stage vector quantizer
10/12/1999CA2190688C Acquisition and error recovery of audio data carried in a packetized data stream
10/12/1999CA2167327C Voice signal transmission system using spectral parameter and voice parameter encoding apparatus and decoding apparatus used for the voice signal transmission system
10/12/1999CA2147394C Quantization of input vectors with and without rearrangement of vector elements of a candidate vector
10/12/1999CA2137418C Multipulse processing with freedom given to multipulse positions of a speech signal
10/07/1999WO1999050828A1 Low-complexity, low-delay, scalable and embedded speech and audio coding with adaptive frame loss concealment
10/06/1999EP0948141A2 Decoding device for multichannel audio bitstream
10/06/1999EP0947052A1 Error correction decoder for vocoding system
10/06/1999CN1231050A Transmitter with improved harmonic speech encoder
10/05/1999US5963898 Analysis-by-synthesis speech coding method with truncation of the impulse response of a perceptual weighting filter
10/05/1999US5963897 Apparatus and method for hybrid excited linear prediction speech encoding
10/05/1999US5963896 Speech coder including an excitation quantizer for retrieving positions of amplitude pulses using spectral parameters and different gains for groups of the pulses
09/1999
09/30/1999WO1999049454A1 Wideband speech synthesis from a narrowband speech signal
09/30/1999WO1999040569A3 A decoding method, speech coding processing unit and a network element
09/30/1999DE19814633A1 Verfahren zur Verschleierung von Sprachsegmentverlusten bei paketorientierter Übertragung Method for masking of speech segment loss in packet-oriented transmission
09/29/1999EP0945853A2 Method for mitigating the effects of speech segments losts in a packet based transmission
09/29/1999EP0945852A1 Speech synthesis
09/29/1999EP0944969A2 Multi-station audio distribution apparatus
09/28/1999US5960401 Method for exponent processing in an audio decoding system
09/28/1999US5960400 Signal transfer acceleration system and method for accelerating transfer of an audio signal through a communications channel
09/28/1999US5960390 Coding method for using multi channel audio signals
09/28/1999US5960389 Methods for generating comfort noise during discontinuous transmission
09/28/1999US5960388 Voiced/unvoiced decision based on frequency band ratio
09/28/1999US5960387 Method and apparatus for compressing and decompressing a voice message in a voice messaging system
09/28/1999US5960386 Method for adaptively controlling the pitch gain of a vocoder's adaptive codebook
09/28/1999US5960037 Encoding of a plurality of information signals
09/28/1999CA2193345C Speech encoding and decoding capable of improving a speech quality
09/28/1999CA2139095C Real-time digital audio compression/decompression system
09/23/1999WO1999048214A2 Transmitting device for transmitting a digital information signal alternately in encoded form and non-encoded form
09/23/1999WO1999048085A1 A signal processing method to analyse transients of speech signals
09/23/1999CA2290644A1 Transmitting device for transmitting a digital information signal alternately in encoded form and non-encoded form
09/22/1999EP0944038A1 Speech encoder with features extracted from current and previous frames
09/22/1999EP0944037A1 Speech encoder with features extracted from current and previous frames
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