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Class Information
Number: 704/205
Name: Data processing: speech signal processing, linguistics, language translation, and audio compression/decompression > Speech signal processing > For storage or transmission > Frequency
Description: Subject matter wherein the speech










Sub-classes under this class:

Class Number Class Name Patents
704/206 Specialized information 306


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
7519538 Audio signal encoding or decoding Apr. 14, 2009
7516064 Adaptive hybrid transform for signal analysis and synthesis Apr. 7, 2009
7505902 Discrimination of components of audio signals based on multiscale spectro-temporal modulations Mar. 17, 2009
7499851 System and method for deploying filters for processing signals Mar. 3, 2009
7496482 Signal separation method, signal separation device and recording medium Feb. 24, 2009
7496517 Method and device for generating a scalable data stream and method and device for decoding a scalable data stream with provision for a bit saving bank function Feb. 24, 2009
7493254 Pitch determination method and apparatus using spectral analysis Feb. 17, 2009
7489789 Method for noise reduction in an audio device and hearing aid with means for reducing noise Feb. 10, 2009
7478045 Method and device for characterizing a signal and method and device for producing an indexed signal Jan. 13, 2009
7475011 Greedy algorithm for identifying values for vocal tract resonance vectors Jan. 6, 2009
7469206 Methods for improving high frequency reconstruction Dec. 23, 2008
7467082 Method and apparatus for transmitting wideband speech signals Dec. 16, 2008
7464028 System and method for frequency domain audio speed up or slow down, while maintaining pitch Dec. 9, 2008
7460994 Method and apparatus for producing a fingerprint, and method and apparatus for identifying an audio signal Dec. 2, 2008
7457756 Method of generating time-frequency signal representation preserving phase information Nov. 25, 2008
7457749 Noise-robust feature extraction using multi-layer principal component analysis Nov. 25, 2008
7451079 Emotion recognition method and device Nov. 11, 2008
7444280 Emphasis of short-duration transient speech features Oct. 28, 2008
7444289 Audio decoding method and apparatus for reconstructing high frequency components with less computation Oct. 28, 2008
7440892 Method, device and program for extracting and recognizing voice Oct. 21, 2008
7426463 System and method for linear prediction Sep. 16, 2008
7421376 Comparison of data signals using characteristic electronic thumbprints Sep. 2, 2008
7415392 System for separating multiple sound sources from monophonic input with non-negative matrix factor deconvolution Aug. 19, 2008
7412377 Voice model for speech processing based on ordered average ranks of spectral features Aug. 12, 2008
7409339 Methods and systems for sample rate conversion Aug. 5, 2008
7406419 Quality assessment tool Jul. 29, 2008
7395210 Progressive to lossless embedded audio coder (PLEAC) with multiple factorization reversible transform Jul. 1, 2008
7392177 Method and system for reducing a voice signal noise Jun. 24, 2008
7392176 Encoding device, decoding device and audio data distribution system Jun. 24, 2008
7386444 Hybrid speech coding and system Jun. 10, 2008
7379864 Method and apparatus for the detection of previous packet loss in non-packetized speech May. 27, 2008
7376554 Excitation for higher band coding in a codec utilising band split coding methods May. 20, 2008
7376562 Method and apparatus for nonlinear frequency analysis of structured signals May. 20, 2008
7373296 Method and apparatus for classifying a spectro-temporal interval of an input audio signal, and a coder including such an apparatus May. 13, 2008
7366658 Noise pre-processor for enhanced variable rate speech codec Apr. 29, 2008
RE40281 Signal processing utilizing a tree-structured array Apr. 29, 2008
7363216 Method and system for parametric characterization of transient audio signals Apr. 22, 2008
7363232 Method and system for enabling audio speed conversion Apr. 22, 2008
7349849 Spacing for microphone elements Mar. 25, 2008
7346516 Method of segmenting an audio stream Mar. 18, 2008
7346500 Method of translating a voice signal to a series of discrete tones Mar. 18, 2008
7346499 Wideband extension of telephone speech for higher perceptual quality Mar. 18, 2008
7345233 Apparatus and method for grouping temporal segments of a piece of music Mar. 18, 2008
7343281 Processing of multi-channel signals Mar. 11, 2008
7330562 Watermarking in the time-frequency domain Feb. 12, 2008
7328160 Encoding device and decoding device Feb. 5, 2008
7319959 Multi-source phoneme classification for noise-robust automatic speech recognition Jan. 15, 2008
7317309 Wideband signal analyzing apparatus, wideband period jitter analyzing apparatus, and wideband skew analyzing apparatus Jan. 8, 2008
7315822 System and method for a media codec employing a reversible transform obtained via matrix lifting Jan. 1, 2008
7302066 Method for eliminating an unwanted signal from a mixture via time-frequency masking Nov. 27, 2007

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