Perceptual speech coding using prediction residuals, having harm

Details Perceptual speech coding using prediction residuals, having harm Perceptual speech coding using prediction residuals, having harm

1996-10-25

1998-12-08

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704219, 704220, 704223, G10L 914

Patent

active

058483870

ABSTRACT:
A speech encoding method and apparatus for encoding an input speech signal on a block-by-block or frame-by-frame basis wherein short-term prediction residuals are found and then sinusoidal analytic encoding parameters are produced based on those short-term prediction residuals. Perceptually weighted vector quantization is performed for voiced blocks or frames by encoding their sinusoidal frequency or analytic harmonic magnitudes and, in the case of unvoiced blocks or frames, the time waveforms of the unvoiced blocks are encoded.

REFERENCES:
patent: 5067158 (1991-11-01), Arjmand
patent: 5495555 (1996-02-01), Swaminathan
patent: 5596676 (1997-01-01), Swaminathan et al.
Kazunori Ozawa and Toshiki Miyano, "4kb/s Improved CELP Coder With Efficient Vector Quantization", Proc. ICASSP 91, pp. 213-216, Apr. 1991.
Kazunori Ozawa, Masahiro Serizawa, Toshiki Miyano, and Toshiyuki Nomura, "M-LCELP Speech Coding at 4Kbps", Proc. ICASSP 94, vol. I, pp. 269-272, Apr. 1994.

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