Vector excitation speech or audio coder for transmission or storage
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United States of America Patent
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Sep 19, 1989
Grant Date -
N/A
app pub date -
Apr 6, 1987
filing date -
Apr 6, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A vector excitation coder compresses vectors by using an optimum codebook designed off line, using an initial arbitrary codebook and a set of speech training vectors exploiting codevector sparsity (i.e., by making zero all but a selected number of samples of lowest amplitude in each of N codebook vectors). A fast-search method selects a number N.sub.c of good excitation vectors from the codebook, where N.sub.c is much smaller tha ORIGIN OF INVENTION The invention described herein was made in the performance of work under a NASA contract, and is subject to the provisions of Public Law 96-517 (35 USC 202) under which the inventors were granted a request to retain title.
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