Method for switched-predictive quantization

Details Method for switched-predictive quantization Method for switched-predictive quantization

1998-08-15

2000-09-19

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704222, 704230, G10L 1904

Patent

active

061226084

ABSTRACT:
A new method for quantization of the LPC coefficients in a speech coder includes an improved form of switched predictive multi-stage vector quantization. The switch predictive quantization includes at least a pair of codebook sets in a MSVQ quantizer and a first and second prediction matrix 24a and 24b with the first prediction matrix 1 used with codebook set 1 and prediction matrix 2 used with codebook set 2 and the encoder determines which prediction matrix/codebooks set produces the minimum quantization error at detector 35 and control 29 gates the indices with the minimum error out of the speech coder.

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