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)
11/1998
11/24/1998CA2137757C Speech parameter encoder
11/24/1998CA2137416C Speech decoder capable of reproducing well background noise
11/24/1998CA2090052C Method and apparatus for the perceptual coding of audio signals
11/19/1998WO1998052188A1 Audio signal encoder, audio signal decoder, and method for encoding and decoding audio signal
11/19/1998WO1998052187A1 Audio coding systems and methods
11/19/1998WO1998035447A3 Audio coding method and apparatus
11/18/1998EP0878798A2 Audio signal encoding/decoding method and apparatus
11/18/1998EP0878790A1 Voice coding system and method
11/18/1998CN1199516A Method and apparatus for minimal redundancy error detection and correction of voice spectrum parameters
11/17/1998US5839110 Transmitting and receiving apparatus
11/17/1998US5839102 Speech coding parameter sequence reconstruction by sequence classification and interpolation
11/17/1998US5839098 Speech coder methods and systems
11/17/1998US5838996 Digital signal managing apparatus
11/17/1998CA2131880C Vector quantizer
11/12/1998WO1998050910A1 Speech coding
11/12/1998WO1998050909A1 Subscriber handoff between multiple access communications system
11/12/1998WO1998050908A1 Method and apparatus for speech analysis and synthesis using lattice-ladder filters
11/12/1998WO1998035341A3 Transmission system for transmitting speech signals
11/12/1998DE19819423A1 Verfahren und Vorrichtung zum Ausführen einer Übergabe zwischen Kommunikationssystemen mit unterschiedlichen Vielfachzugriffsschemata Method and apparatus for performing a handoff between communications systems having different multiple access schemes
11/11/1998EP0877355A2 Speech coding
11/11/1998CN1198620A Echo/noise eliminator with delay compensation
11/11/1998CN1198613A Digital data coding/decoding method and equipment thereof
11/10/1998US5835889 Method and apparatus for detecting hangover periods in a TDMA wireless communication system using discontinuous transmission
11/10/1998US5835588 Digital dictation system with protection against unauthorized listening-in
11/10/1998US5835043 Signal processing apparatus, signal recording apparatus, and signal reproducing apparatus
11/10/1998US5835030 Signal encoding method and apparatus using selected predetermined code tables
11/05/1998WO1998043405A3 A method and system for manipulation of audio or video signals
11/04/1998EP0875999A2 Encoding method and apparatus, decoding method and apparatus and recording medium
11/04/1998CN1198275A Method and apparatus for transporting auxiliary data in audio signals
11/04/1998CN1197975A Signal coding method and apparatus
11/04/1998CN1197958A Encoding method and apparatus, decoding method and apparatus and recording medium
11/03/1998US5832443 Method and apparatus for adaptive audio compression and decompression
11/03/1998US5832437 Continuous and discontinuous sine wave synthesis of speech signals from harmonic data of different pitch periods
11/03/1998US5832427 Audio signal signal-to-mask ratio processor for subband coding
11/03/1998US5832426 High efficiency audio encoding method and apparatus
11/03/1998US5832425 System for encoding a speech signal into a bit stream
11/03/1998US5832424 Method for encoding an input signal
11/03/1998US5832180 Determination of gain for pitch period in coding of speech signal
11/03/1998US5832119 Methods for controlling systems using control signals embedded in empirical data
11/03/1998CA2095883C Voice messaging codes
10/1998
10/29/1998WO1998048531A1 Method for masking defects in a stream of audio data
10/29/1998WO1998048524A1 Methods and apparatus for generating noise signals from speech signals
10/29/1998WO1998048408A1 Method and system for coding human speech for subsequent reproduction thereof
10/28/1998EP0873641A1 Communication system and method
10/28/1998EP0873614A1 Post-compression hidden data transport
10/27/1998US5828996 Apparatus and method for encoding/decoding a speech signal using adaptively changing codebook vectors
10/27/1998US5828995 Method and apparatus for intelligible fast forward and reverse playback of time-scale compressed voice messages
10/27/1998US5828993 Apparatus and method of coding and decoding vocal sound data based on phoneme
10/27/1998US5828811 Speech signal coding system wherein non-periodic component feedback to periodic excitation signal source is adaptively reduced
10/22/1998WO1998047134A1 Method and device for coding an audio signal by 'forward' and 'backward' lpc analysis
10/22/1998DE19738846C1 Process for determining spacing in vector space
10/21/1998EP0695454B1 Vocoder asic
10/21/1998CN1196612A Speech transmission/reception system in which error data is replaced by speech synthesized data
10/21/1998CN1196611A Scalable audio coding/decoding method and apparatus
10/20/1998US5826235 Communication package with apparatus and method for storing and retrieving a permanent message
10/20/1998US5826232 Method for voice analysis and synthesis using wavelets
10/20/1998US5826231 Method and device for vocal synthesis at variable speed
10/20/1998US5826226 Speech coding apparatus having amplitude information set to correspond with position information
10/20/1998US5826224 Method of storing reflection coeffients in a vector quantizer for a speech coder to provide reduced storage requirements
10/20/1998US5826223 Method for generating random code book of code-excited linear predictive coding
10/20/1998US5826222 Method of analyzing a digitized speech signal
10/20/1998US5826221 Vocal tract prediction coefficient coding and decoding circuitry capable of adaptively selecting quantized values and interpolation values
10/20/1998US5825979 Digital audio signal coding and/or deciding method
10/20/1998US5825320 Gain control method for audio encoding device
10/20/1998US5825311 Vector coding method, encoder using the same and decoder therefor
10/20/1998US5825310 Signal encoding method
10/15/1998WO1998046045A1 Encoding method and device, decoding method and device, and recording medium
10/15/1998WO1998046044A1 Apparatus and method for bass enhancement
10/15/1998WO1998045951A1 Speech transmission system
10/15/1998WO1998045833A1 Variable bitrate speech transmission system
10/14/1998EP0871158A2 System for speech coding using a multipulse excitation
10/14/1998EP0870299A1 A communication system and method using a speaker dependent time-scaling technique
10/14/1998CN1195930A Audio signal coding method and apparatus
10/13/1998US5822732 Filter for speech modification or enhancement, and various apparatus, systems and method using same
10/13/1998US5822724 Optimized pulse location in codebook searching techniques for speech processing
10/13/1998US5822723 Encoding and decoding method for linear predictive coding (LPC) coefficient
10/13/1998US5822722 Wide-band signal encoder
10/13/1998US5822721 Method and apparatus for fractal-excited linear predictive coding of digital signals
10/13/1998US5822436 Photographic products and methods employing embedded information
10/13/1998US5822370 Compression/decompression for preservation of high fidelity speech quality at low bandwidth
10/13/1998US5822360 Method and apparatus for transporting auxiliary data in audio signals
10/13/1998CA2112145C Speech decoder
10/08/1998WO1998035448A3 Communication network for transmitting speech signals
10/07/1998EP0869622A2 Scalable audio coding/decoding method and apparatus
10/07/1998EP0869620A2 Digital data coding/decoding method and apparatus
10/07/1998EP0869477A2 Apparatus for speech coding using a multipulse excitation signal
10/07/1998EP0869476A1 Comfort noise generation device and speech codec including elements of such device
10/07/1998EP0868715A1 Method and apparatus for processing digital data using fractal-excited linear predictive coding
10/07/1998EP0807307A4 A pitch post-filter
10/07/1998EP0600504B1 Method of and device for speech coding based on analysis-by-synthesis techniques
10/07/1998CN1195414A Method and apparatus for generating and encoding line spectral square roots
10/07/1998CN1195160A Scalable audio coding/decoding method and apparatus
10/06/1998US5819224 Split matrix quantization
10/06/1998US5819218 Voice encoder with a function of updating a background noise
10/06/1998US5819213 Speech encoding and decoding with pitch filter range unrestricted by codebook range and preselecting, then increasing, search candidates from linear overlap codebooks
10/06/1998US5819212 Voice encoding method and apparatus using modified discrete cosine transform
10/06/1998US5818820 Method and system for data link expansion or contraction using spread spectrum TDMA communication
10/06/1998CA2142398C Linear prediction coefficient generation during frame erasure or packet loss
10/06/1998CA2142392C Linear prediction coefficient generation during frame erasure or packet loss
10/06/1998CA2090160C Rate loop processor for perceptual encoder/decoder
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