Method for searching fixed codebook based upon global pulse...

Details Method for searching fixed codebook based upon global pulse... Method for searching fixed codebook based upon global pulse...

2003-12-17

2010-06-15

Hudspeth, David R (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S223000, C370S352000

Reexamination Certificate

active

07739108

ABSTRACT:
The present research can decrease the amount of computation and enhance speech quality by using a global pulse replacement method in a fixed codebook search. The fixed codebook search method in a speech encoder based upon global pulse replacement, includes the steps of: (a) computing absolute values of the pulse-position likelihood-estimator vectors; (b) temporarily obtaining a codebook vector; (c) computing a mathematical equation by replacing a pulse; (d) determining whether a value computed based upon the mathematical equation is increased after pulse replacement; (e) obtaining a new codebook vector by replacing the pulse; and (f) maintaining a previous codebook vector.

REFERENCES:
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patent: 102001009585 (2001-11-01), None
Park et al., “Efficient Codebook Search Method For ACELP Speech Codecs” IEEE 2002, pp. 17-19.

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