Method and apparatus for robust speech classification

Details Method and apparatus for robust speech classification Method and apparatus for robust speech classification

2000-12-08

2008-12-30

Armstrong, Angela A (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S214000, C704S217000

Reexamination Certificate

active

07472059

ABSTRACT:
A speech classification technique for robust classification of varying modes of speech to enable maximum performance of multi-mode variable bit rate encoding techniques. A speech classifier accurately classifies a high percentage of speech segments for encoding at minimal bit rates, meeting lower bit rate requirements. Highly accurate speech classification produces a lower average encoded bit rate, and higher quality decoded speech. The speech classifier considers a maximum number of parameters for each frame of speech, producing numerous and accurate speech mode classifications for each frame. The speech classifier correctly classifies numerous modes of speech under varying environmental conditions. The speech classifier inputs classification parameters from external components, generates internal classification parameters from the input parameters, sets a Normalized Auto-correlation Coefficient Function threshold and selects a parameter analyzer according to the signal environment, and then analyzes the parameters to produce a speech mode classification.

REFERENCES:
patent: 4281218 (1981-07-01), Chuang et al.
patent: 4720862 (1988-01-01), Nakata et al.
patent: 5414796 (1995-05-01), Jacobs et al.
patent: 5664052 (1997-09-01), Nishiguchi et al.
patent: 5680508 (1997-10-01), Liu
patent: 5727123 (1998-03-01), McDonough et al.
patent: 5734789 (1998-03-01), Swaminathan et al.
patent: 5749067 (1998-05-01), Barrett
patent: 5774847 (1998-06-01), Chu et al.
patent: 5784532 (1998-07-01), McDonough et al.
patent: 5937375 (1999-08-01), Nakamura
patent: 6154721 (2000-11-01), Sonnic
patent: 6640208 (2003-10-01), Zhang et al.
patent: 6799161 (2004-09-01), Yokoyama
patent: 0451796 (1991-10-01), None
patent: 2000010577 (1998-06-01), None
“Sinusoidal Coding”Speech Coding and Synthesis, W.B. Kleijn et al., Elsevier 1995 (Ch. 4).
“Multimode and Variable-Rate Coding of Speech”Speech Coding and Synthesis, W.B. Kleijn et al., Elsevier 1995 (Ch. 7).
“Linear Predictive Coding of Speech”Digital Processing of Speech Signals, L.R. Rabiner et al., Prentice Hall Signal Processing Series, Alan V. Oppenheimer, New Jersey (Ch. 8).
A.M. Kondoz (1994) Digital Speech, Coding for Low Bit Rate Communications Systems. John Wiley & Sons, Ltd., ISBN 0 471 95064 5; pp. 64-65.
International Search Report PCT/US01/46971, International Search Authority - European Patent Office - Jan. 7, 2002.

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