Speech coding system and a method of encoding speech

Details Speech coding system and a method of encoding speech Speech coding system and a method of encoding speech

1990-08-06

1992-08-18

Kemeny, Emanuel S.

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

381 31, G10L 500

Patent

active

051406381

ABSTRACT:
A speech coding system of the code excited linear prediction (CELP) type includes apparatus (24,26) for filtering digitized speech samples to form perceptually weighted speech samples. Entries in a one-dimensional codebook (110) comprising frame length sequences are filtered in a perceptually weighted synthesis filter (28) to form a one-dimensional filtered codebook. The filtered codebook entries are compared with the perceptually weighted speech signals to obtain a codebook index which gives the minimum perceptually weighted error when the speech is resynthesized. Using a one-dimensional codebook (110) reduces the amount of computation which is required compared to the use of a two-dimensional codebook.

REFERENCES:
Bottau, et al, "On Different Vector Predictive Coding etc", Eurasip, 1988, pp. 871-874.
Adoul, et al, "Fast CELP Coding Based on Algebraic Codes," ICASSP, 1987, pp. 1957-1960.
Lin, "Speech Coding etc," ICASSP, 1987, pp. 1354-1357.

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