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Class Information
Number: 704/233
Name: Data processing: speech signal processing, linguistics, language translation, and audio compression/decompression > Speech signal processing > Recognition > Detect speech in noise
Description: Subject matter wherein the discrete components are distinguished from noise

Patents under this class:
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Patent Number Title Of Patent Date Issued
6205423 Method for coding speech containing noise-like speech periods and/or having background noise Mar. 20, 2001
6202046 Background noise/speech classification method Mar. 13, 2001
6188981 Method and apparatus for detecting voice activity in a speech signal Feb. 13, 2001
6188982 On-line background noise adaptation of parallel model combination HMM with discriminative learning using weighted HMM for noisy speech recognition Feb. 13, 2001
6185527 System and method for automatic audio content analysis for word spotting, indexing, classification and retrieval Feb. 6, 2001
6178399 Time series signal recognition with signal variation proof learning Jan. 23, 2001
6175634 Adaptive noise reduction technique for multi-point communication system Jan. 16, 2001
6175862 Hot objects with sequenced links in web browsers Jan. 16, 2001
6173258 Method for reducing noise distortions in a speech recognition system Jan. 9, 2001
6169971 Method to suppress noise in digital voice processing Jan. 2, 2001
6167375 Method for encoding and decoding a speech signal including background noise Dec. 26, 2000
6163766 Adaptive rate system and method for wireless communications Dec. 19, 2000
6161087 Speech-recognition-assisted selective suppression of silent and filled speech pauses during playback of an audio recording Dec. 12, 2000
6157670 Background energy estimation Dec. 5, 2000
6154721 Method and device for detecting voice activity Nov. 28, 2000
6144937 Noise suppression of speech by signal processing including applying a transform to time domain input sequences of digital signals representing audio information Nov. 7, 2000
6138094 Speech recognition method and system in which said method is implemented Oct. 24, 2000
6138095 Speech recognition Oct. 24, 2000
6134322 Echo suppressor for a speech input dialogue system Oct. 17, 2000
6134524 Method and apparatus to detect and delimit foreground speech Oct. 17, 2000
6131044 Method for increasing the voice recognition rate of a voice recognition calling device Oct. 10, 2000
6122609 Method and device for the optimized processing of a disturbing signal during a sound capture Sep. 19, 2000
6122611 Adding noise during LPC coded voice activity periods to improve the quality of coded speech coexisting with background noise Sep. 19, 2000
6104993 Apparatus and method for rate determination in a communication system Aug. 15, 2000
6104994 Method for speech coding under background noise conditions Aug. 15, 2000
6101466 Method and system for improved discontinuous speech transmission Aug. 8, 2000
6091969 Method and apparatus for inband signaling control of vocoder bypass Jul. 18, 2000
6088670 Voice detector Jul. 11, 2000
6078882 Method and apparatus for extracting speech spurts from voice and reproducing voice from extracted speech spurts Jun. 20, 2000
6076057 Unsupervised HMM adaptation based on speech-silence discrimination Jun. 13, 2000
6070089 Method and apparatus for control of vocoder bypass utilizing inband signaling May. 30, 2000
6067513 Speech recognition method and speech recognition apparatus May. 23, 2000
6067520 System and method of recognizing continuous mandarin speech utilizing chinese hidden markou models May. 23, 2000
6061647 Voice activity detector May. 9, 2000
6061651 Apparatus that detects voice energy during prompting by a voice recognition system May. 9, 2000
6044340 Accelerated convolution noise elimination Mar. 28, 2000
6044341 Noise suppression apparatus and recording medium recording processing program for performing noise removal from voice Mar. 28, 2000
6044342 Speech spurt detecting apparatus and method with threshold adapted by noise and speech statistics Mar. 28, 2000
6038532 Signal processing device for cancelling noise in a signal Mar. 14, 2000
6023674 Non-parametric voice activity detection Feb. 8, 2000
6011846 Methods and apparatus for echo suppression Jan. 4, 2000
6009396 Method and system for microphone array input type speech recognition using band-pass power distribution for sound source position/direction estimation Dec. 28, 1999
6001131 Automatic target noise cancellation for speech enhancement Dec. 14, 1999
6002762 Method and apparatus for making nonintrusive noise and speech level measurements on voice calls Dec. 14, 1999
5999900 Reduced redundancy test signal similar to natural speech for supporting data manipulation functions in testing telecommunications equipment Dec. 7, 1999
5999901 Telephone network apparatus and method using echo delay and attenuation Dec. 7, 1999
5995826 Methods for conditional tone responsive reconnection to directory assistance center Nov. 30, 1999
5995924 Computer-based method and apparatus for classifying statement types based on intonation analysis Nov. 30, 1999
5995927 Method for performing stochastic matching for use in speaker verification Nov. 30, 1999
5991718 System and method for noise threshold adaptation for voice activity detection in nonstationary noise environments Nov. 23, 1999

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