Method and apparatus for efficient multiband celp wideband speec

Details Method and apparatus for efficient multiband celp wideband speec Method and apparatus for efficient multiband celp wideband speec

1996-02-26

1998-07-07

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704223, 704262, 704264, 704500, G10L 914, G10H 700, H04B 166

Patent

active

057783357

ABSTRACT:
A method of digitally compressing speech and music by use of multiple band ("multiband") fixed excitations stored in codebooks. The use of multiband fixed excitations, along with a coupling method for interconnecting the excitation codebooks and adaptive codebooks and for generating the composite excitation signal, improve the long-term and short-term prediction, and the use of voice-music classification allows the coding structure to be adapted to the statistical character of the audio signal.

REFERENCES:
Anil Ubale and Allen Gersho, "A Multi-Band CELP Wideband Speech Coder," Proc. ICASSP 97, pp. 1367-1370, Apr. 1997.
Jean Laroche and Jean-Louis Meillier, "Multichannel Excitation/Filter Modeling of Percussive Sounds with Application to the Piano", IEEE Trans. on Speech and Audio Processing, vol. 2, No. 2, pp. 329-344, Apr. 1994.
Allen Gersho, "Advances in Speech and Audio Compression," Proc. IEEE, vol. 82, No. 6, pp. 900-918, Jun. 1994.
Peter Noll, "Digital Audio Coding for Visual Communications", Proc. IEEE, vol. 83, No. 6, pp. 925-943, Jun. 1995.

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