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Class Information
Number: 704/262
Name: Data processing: speech signal processing, linguistics, language translation, and audio compression/decompression > Speech signal processing > Synthesis > Linear prediction
Description: Subject matter wherein the component parts are represented by coefficients derived from a sequence of past speech

Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
6029134 Method and apparatus for synthesizing speech Feb. 22, 2000
5995923 Method and apparatus for improving the voice quality of tandemed vocoders Nov. 30, 1999
5983173 Envelope-invariant speech coding based on sinusoidal analysis of LPC residuals and with pitch conversion of voiced speech Nov. 9, 1999
5963897 Apparatus and method for hybrid excited linear prediction speech encoding Oct. 5, 1999
5930749 Monitoring, identification, and selection of audio signal poles with characteristic behaviors, for separation and synthesis of signal contributions Jul. 27, 1999
5893061 Method of synthesizing a block of a speech signal in a celp-type coder Apr. 6, 1999
5890108 Low bit-rate speech coding system and method using voicing probability determination Mar. 30, 1999
5832436 System architecture and method for linear interpolation implementation Nov. 3, 1998
5826231 Method and device for vocal synthesis at variable speed Oct. 20, 1998
5826221 Vocal tract prediction coefficient coding and decoding circuitry capable of adaptively selecting quantized values and interpolation values Oct. 20, 1998
5822721 Method and apparatus for fractal-excited linear predictive coding of digital signals Oct. 13, 1998
5819224 Split matrix quantization Oct. 6, 1998
5809468 Voice recording and reproducing apparatus having function for initializing contents of adaptive code book Sep. 15, 1998
5794182 Linear predictive speech encoding systems with efficient combination pitch coefficients computation Aug. 11, 1998
5794199 Method and system for improved discontinuous speech transmission Aug. 11, 1998
5787390 Method for linear predictive analysis of an audiofrequency signal, and method for coding and decoding an audiofrequency signal including application thereof Jul. 28, 1998
5778335 Method and apparatus for efficient multiband celp wideband speech and music coding and decoding Jul. 7, 1998
5774837 Speech coding system and method using voicing probability determination Jun. 30, 1998
5761635 Method and apparatus for implementing a long-term synthesis filter Jun. 2, 1998
5752223 Code-excited linear predictive coder and decoder with conversion filter for converting stochastic and impulsive excitation signals May. 12, 1998
5740320 Text-to-speech synthesis by concatenation using or modifying clustered phoneme waveforms on basis of cluster parameter centroids Apr. 14, 1998
5732188 Method for the modification of LPC coefficients of acoustic signals Mar. 24, 1998
5729655 Method and apparatus for speech compression using multi-mode code excited linear predictive coding Mar. 17, 1998
5719993 Long term predictor Feb. 17, 1998
5719994 Determination of an excitation vector in CELP encoder Feb. 17, 1998
5717827 Text-to-speech system using vector quantization based speech enconding/decoding Feb. 10, 1998
5717822 Computational complexity reduction during frame erasure of packet loss Feb. 10, 1998
5701392 Depth-first algebraic-codebook search for fast coding of speech Dec. 23, 1997
5698807 Digital sampling instrument Dec. 16, 1997
5696873 Vocoder system and method for performing pitch estimation using an adaptive correlation sample window Dec. 9, 1997
5696875 Method and system for compressing a speech signal using nonlinear prediction Dec. 9, 1997
5694521 Variable speed playback system Dec. 2, 1997
5684920 Acoustic signal transform coding method and decoding method having a high efficiency envelope flattening method therein Nov. 4, 1997
5673362 Speech synthesis system in which a plurality of clients and at least one voice synthesizing server are connected to a local area network Sep. 30, 1997
5668924 Digital sound recording and reproduction device using a coding technique to compress data for reduction of memory requirements Sep. 16, 1997
5659658 Method for converting speech using lossless tube models of vocals tracts Aug. 19, 1997
5642466 Intonation adjustment in text-to-speech systems Jun. 24, 1997
5642464 Methods and apparatus for noise conditioning in digital speech compression systems using linear predictive coding Jun. 24, 1997
5621853 Burst excited linear prediction Apr. 15, 1997
5602961 Method and apparatus for speech compression using multi-mode code excited linear predictive coding Feb. 11, 1997
5596676 Mode-specific method and apparatus for encoding signals containing speech Jan. 21, 1997
5579437 Pitch epoch synchronous linear predictive coding vocoder and method Nov. 26, 1996
5553192 Apparatus for noise removal during the silence periods in the discontinuous transmission of speech signals to a mobile unit Sep. 3, 1996
5548680 Method and device for speech signal pitch period estimation and classification in digital speech coders Aug. 20, 1996
5506899 Voice suppressor Apr. 9, 1996
5483619 Method and apparatus for editing an audio signal Jan. 9, 1996
5475712 Voice coding communication system and apparatus therefor Dec. 12, 1995
5450449 Linear prediction coefficient generation during frame erasure or packet loss Sep. 12, 1995
5444816 Dynamic codebook for efficient speech coding based on algebraic codes Aug. 22, 1995
5432883 Voice coding apparatus with synthesized speech LPC code book Jul. 11, 1995

1 2 3 4

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