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Class Information
Number: 704/200
Name: Data processing: speech signal processing, linguistics, language translation, and audio compression/decompression > Speech signal processing
Description: Subject matter wherein the system performs operations or functions on signals which represent speech










Sub-classes under this class:

Class Number Class Name Patents
704/270 Application 2,823
704/201 For storage or transmission 953
704/200.1 Psychoacoustic 590
704/231 Recognition 1,343
704/258 Synthesis 939


Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Patent Number Title Of Patent Date Issued
5280561 Method for processing audio signals in a sub-band coding system Jan. 18, 1994
5280563 Method of optimizing a composite speech recognition expert Jan. 18, 1994
5280562 Speech coding apparatus with single-dimension acoustic prototypes for a speech recognizer Jan. 18, 1994
5278942 Speech coding apparatus having speaker dependent prototypes generated from nonuser reference data Jan. 11, 1994
5278943 Speech animation and inflection system Jan. 11, 1994
5276764 Method and device for compressing and expanding an analog signal Jan. 4, 1994
5276714 Broadcast/non-broadcast MUSE signal sound decoder with a variable protection period Jan. 4, 1994
5274738 Modular digital voice processing system Dec. 28, 1993
5271088 Automated sorting of voice messages through speaker spotting Dec. 14, 1993
5268990 Method for recognizing speech using linguistically-motivated hidden Markov models Dec. 7, 1993
5267174 Interactive medication delivery system Nov. 30, 1993
5265217 Optimal parametric signal processor for least square finite impulse response filtering Nov. 23, 1993
5265191 Technique for voice-based security systems Nov. 23, 1993
5263118 Parking ticket enforcement system Nov. 16, 1993
5263117 Method and apparatus for finding the best splits in a decision tree for a language model for a speech recognizer Nov. 16, 1993
5263120 Adaptive fast fuzzy clustering system Nov. 16, 1993
5261027 Code excited linear prediction speech coding system Nov. 9, 1993
5261035 Neural network architecture based on summation of phase-coherent alternating current signals Nov. 9, 1993
5255342 Pattern recognition system and method using neural network Oct. 19, 1993
5255339 Low bit rate vocoder means and method Oct. 19, 1993
5255341 Command input device for voice controllable elevator system Oct. 19, 1993
5255340 Method for detecting voice presence on a communication line Oct. 19, 1993
5253325 Data compression with dynamically compiled dictionary Oct. 12, 1993
5253326 Prioritization method and device for speech frames coded by a linear predictive coder Oct. 12, 1993
5251283 Speech recognition system with an automatic adaptive learning device Oct. 5, 1993
5251284 Optimal parametric signal processor with lattice basic cell Oct. 5, 1993
5249256 Electronic instrument for putting out information in the form of voice Sep. 28, 1993
5245694 User-programmable voice notification device for security alarm systems Sep. 14, 1993
5243685 Method and device for the coding of predictive filters for very low bit rate vocoders Sep. 7, 1993
5243686 Multi-stage linear predictive analysis method for feature extraction from acoustic signals Sep. 7, 1993
5241619 Word dependent N-best search method Aug. 31, 1993
5241650 Digital speech decoder having a postfilter with reduced spectral distortion Aug. 31, 1993
5237642 Optimal parametric signal processor Aug. 17, 1993
5235669 Low-delay code-excited linear-predictive coding of wideband speech at 32 kbits/sec Aug. 10, 1993
5235670 Multiple impulse excitation speech encoder and decoder Aug. 10, 1993
5235671 Dynamic bit allocation subband excited transform coding method and apparatus Aug. 10, 1993
5231692 Pitch period searching method and circuit for speech codec Jul. 27, 1993
5231691 Speech recognition system including interrupt scheme that avoids operational and interfacing conflicts Jul. 27, 1993
5230060 Speech coder and decoder for adaptive delta modulation coding system Jul. 20, 1993
5230037 Phonetic Hidden Markov model speech synthesizer Jul. 20, 1993
5230036 Speech coding system utilizing a recursive computation technique for improvement in processing speed Jul. 20, 1993
5228110 Method for recognizing N different word strings in a speech signal Jul. 13, 1993
5226108 Processing a speech signal with estimated pitch Jul. 6, 1993
5222187 Grammar-based checksum constraints for high performance speech recognition circuit Jun. 22, 1993
5222188 Method and apparatus for speech recognition based on subsyllable spellings Jun. 22, 1993
5222190 Apparatus and method for identifying a speech pattern Jun. 22, 1993
5220639 Mandarin speech input method for Chinese computers and a mandarin speech recognition machine Jun. 15, 1993
5218668 Keyword recognition system and method using template concantenation model Jun. 8, 1993
5216748 Integrated dynamic programming circuit Jun. 1, 1993
5216744 Time scale modification of speech signals Jun. 1, 1993

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