Method and apparatus for dynamically adapting a vector-quantizin

Details Method and apparatus for dynamically adapting a vector-quantizin Method and apparatus for dynamically adapting a vector-quantizin

1989-10-13

1991-04-09

Shaw, Dale M.

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

G10L 702

Patent

active

050070924

ABSTRACT:
A signal vector quantizing coder (CELP) is provided with an adaptive codebook originally loaded with preselected codewords. The codebook is split into a fixed contents portion and a fixed length adaptive contents portion. During coding operations, the codewords dynamically selected for coding the coder input signal are shifted into the fixed length adaptive codebook section for codebook contents updating purposes.

REFERENCES:
patent: 4720861 (1988-01-01), Bertrand
Paul, "An 800BPS Adaptive Vector Quantization Vocoder Using A Perceptual Distance Measure", ICASSP 83, pp. 73-76.
Makhoul et al., "Vector Quantization in Speech Coding", IEEE Proceedings, vol. 73, No. 11, 11/85, pp. 1551-1588.

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