| 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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| 03/31/1999 | EP0905918A2 Method and apparatus for encoding audio signals |
| 03/31/1999 | EP0905680A2 Method for quantizing LPC parameters using switched-predictive quantization |
| 03/31/1999 | EP0904637A1 Data compression/expansion on a plurality of digital information signals |
| 03/30/1999 | US5890125 Method and apparatus for encoding and decoding multiple audio channels at low bit rates using adaptive selection of encoding method |
| 03/30/1999 | US5890124 Windowing method for decoding of MPEG audio data |
| 03/30/1999 | US5890112 Memory reduction for error concealment in subband audio coders by using latest complete frame bit allocation pattern or subframe decoding result |
| 03/30/1999 | US5890110 Variable dimension vector quantization |
| 03/30/1999 | US5890108 Low bit-rate speech coding system and method using voicing probability determination |
| 03/30/1999 | US5890107 Sound signal processing circuit which independently calculates left and right mask levels of sub-band sound samples |
| 03/30/1999 | US5890105 Low bit rate coding system for high speed compression of speech data |
| 03/30/1999 | US5890104 Method and apparatus for testing telecommunications equipment using a reduced redundancy test signal |
| 03/30/1999 | US5889483 Mute signal processing circuit for one-bit digital signal |
| 03/25/1999 | WO1999014866A2 Transmission system with improved reconstruction of missing parts |
| 03/25/1999 | WO1999014744A1 Method for conditioning a digital speech signal |
| 03/25/1999 | DE19843634A1 Memory location assignment method for real-time audio data |
| 03/25/1999 | CA2304013A1 Method for conditioning a digital speech signal |
| 03/24/1999 | EP0903729A2 Speech coding apparatus and pitch prediction method of input speech signal |
| 03/23/1999 | US5887020 Multi-band, multi-mode spread-spectrum communication system |
| 03/23/1999 | US5886276 System and method for multiresolution scalable audio signal encoding |
| 03/18/1999 | WO1999013589A1 Audio processor |
| 03/17/1999 | EP0902421A2 Voice coder and method |
| 03/17/1999 | EP0901677A1 Device for determining the quality of an output signal to be generated by a signal processing circuit, and also method |
| 03/17/1999 | EP0570362B1 Digital speech decoder having a postfilter with reduced spectral distortion |
| 03/16/1999 | US5884269 Lossless compression/decompression of digital audio data |
| 03/16/1999 | US5884268 Method and apparatus for reducing artifacts that result from time compressing and decompressing speech |
| 03/16/1999 | US5884253 Prototype waveform speech coding with interpolation of pitch, pitch-period waveforms, and synthesis filter |
| 03/16/1999 | US5884252 Method of and apparatus for coding speech signal |
| 03/16/1999 | US5884251 Voice coding and decoding method and device therefor |
| 03/16/1999 | US5884048 Digital audio signal processor having small input buffer |
| 03/16/1999 | US5884010 Linear prediction coefficient generation during frame erasure or packet loss |
| 03/11/1999 | WO1999012292A1 Fast synthesis sub-band filtering method for digital signal decoding |
| 03/11/1999 | WO1999012156A1 Reducing sparseness in coded speech signals |
| 03/10/1999 | EP0901131A2 Method and apparatus for detecting the end of message recorded onto an array of analog memory elements |
| 03/10/1999 | EP0901118A2 Method and device for distance calculation in high dimensional vector spaces |
| 03/10/1999 | EP0901106A2 System and method using mode bits to support multiple coding standards |
| 03/10/1999 | EP0900482A1 Method and apparatus for minimal redundancy error detection and correction of voice spectrum parameters |
| 03/09/1999 | US5881104 Voice messaging system having user-selectable data compression modes |
| 03/04/1999 | WO1999010837A1 Method and apparatus for watermarking video images |
| 03/04/1999 | WO1999010719A1 Method and apparatus for hybrid coding of speech at 4kbps |
| 03/04/1999 | CA2301218A1 Method and apparatus for watermarking video images |
| 03/03/1999 | EP0899892A2 Signal processing apparatus and method, and information recording apparatus |
| 03/03/1999 | EP0899886A2 High quality audio encoding/decoding apparatus |
| 03/03/1999 | EP0899746A2 Single message multilevel analog signal recording and playback system |
| 03/03/1999 | EP0899720A2 Quantization of linear prediction coefficients |
| 03/03/1999 | EP0899718A2 Nonlinear filter for noise suppression in linear prediction speech processing devices |
| 03/03/1999 | EP0898777A2 Cryptographic methods, apparatus and systems for storage media electronic rights management in closed and connected appliances |
| 03/03/1999 | EP0748499A4 Method, device, and systems for determining a masking level for a subband in a subband audio encoder |
| 03/03/1999 | CN1209917A Data compression and expansion of audio signals |
| 03/02/1999 | US5878388 Voice analysis-synthesis method using noise having diffusion which varies with frequency band to modify predicted phases of transmitted pitch data blocks |
| 03/02/1999 | US5878387 Coding apparatus having adaptive coding at different bit rates and pitch emphasis |
| 03/02/1999 | US5878171 Encoding apparatus |
| 03/02/1999 | US5878081 Transmission system for quasi periodic signals |
| 03/02/1999 | US5878080 N-channel transmission, compatible with 2-channel transmission and 1-channel transmission |
| 03/02/1999 | US5877971 Digital signal processing |
| 02/28/1999 | CA2244008A1 Nonlinear filter for noise suppression in linear prediction speech pr0cessing devices |
| 02/25/1999 | WO1999009684A1 Post-compression hidden data transport for video |
| 02/24/1999 | EP0898267A2 Speech coding method and system |
| 02/24/1999 | EP0677202B1 Discriminating between stationary and non-stationary signals |
| 02/24/1999 | CN1209032A Portable telephone device |
| 02/23/1999 | US5875424 Encoding system and decoding system for audio signals including pulse quantization |
| 02/23/1999 | US5875423 Method for selecting noise codebook vectors in a variable rate speech coder and decoder |
| 02/18/1999 | WO1998020696A3 Method and apparatus for compressing and transmitting high speed data |
| 02/18/1999 | CA2244674A1 Single message multilevel, analog signal recording and playback system |
| 02/17/1999 | EP0686328B1 Digital dictation system with protection against unauthorised listening-in |
| 02/17/1999 | CN1208489A Multi-channel predictive subband coder using psychoacoustic adaptive bit allocation |
| 02/16/1999 | US5873065 Two-stage compression and expansion of coupling processed multi-channel sound signals for transmission and recording |
| 02/16/1999 | US5873063 LSP speech synthesis device |
| 02/16/1999 | US5873060 Signal coder for wide-band signals |
| 02/16/1999 | US5873059 Method and apparatus for decoding and changing the pitch of an encoded speech signal |
| 02/16/1999 | US5873058 Voice coding-and-transmission system with silent period elimination |
| 02/16/1999 | US5872784 High speed single chip digital video network apparatus |
| 02/10/1999 | EP0896498A2 Audio signal processing apparatus and audio signal processing method for multi channel audio reproduction system |
| 02/10/1999 | EP0896321A1 Sound compression/decompression method and system |
| 02/10/1999 | EP0896318A2 interconnection between personal computer and display ina multimedia environment |
| 02/10/1999 | EP0895672A2 Communication network for transmitting speech signals |
| 02/10/1999 | EP0870299A4 A communication system and method using a speaker dependent time-scaling technique |
| 02/10/1999 | EP0655159B1 Rejected frame concealment |
| 02/09/1999 | US5870703 Method for encoding audio information |
| 02/09/1999 | US5870497 Decoder for compressed video signals |
| 02/09/1999 | US5870405 Digital transmission of acoustic signals over a noisy communication channel |
| 02/09/1999 | US5870397 Method for transporting a stream of packets |
| 02/09/1999 | US5870354 Data recording and reproducing apparatus capable of detecting an input for controlling an output |
| 02/04/1999 | WO1999005839A1 Cellular telephone with voice dialing function |
| 02/04/1999 | DE19742201C1 Method of encoding time discrete audio signals, esp. for studio use |
| 02/03/1999 | EP0894409A1 Detection of speech channel back-looping |
| 02/03/1999 | CN1207195A Sound source vector generator, voice encoder, and voice decoder |
| 02/02/1999 | US5867819 For decoding encoded data |
| 02/02/1999 | US5867814 Speech coder that utilizes correlation maximization to achieve fast excitation coding, and associated coding method |
| 02/02/1999 | CA2154881C A system and method for compression and decompression of audio signals |
| 01/28/1999 | WO1999004572A1 Re-encoding decoded signals |
| 01/28/1999 | WO1999004506A1 Method for coding an audio signal |
| 01/28/1999 | WO1999004505A1 Method for signalling a noise substitution during audio signal coding |
| 01/28/1999 | WO1999004498A2 Method and apparatus for encoding and decoding multiple audio channels at low bit rates |
| 01/28/1999 | WO1999004387A2 Apparatus and method for simplified analog signal record and playback |
| 01/28/1999 | CA2296514A1 Apparatus and method for simplified analog signal record and playback |
| 01/27/1999 | EP0893791A2 Methods for encoding speech, for enhancing speech and for synthesizing speech |
| 01/27/1999 | EP0892974A1 Method and arrangement for reconstruction of a received speech signal |
| 01/27/1999 | CN1206528A Transmission of digital information signal having specific first sampling frequency |
| 01/26/1999 | US5864817 Method for decoding MPEG audio data |
| 01/26/1999 | US5864816 Method of mixing two or more compressed digitized audio signals |