Method of use of voice message coder/decoder
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United States of America Patent
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Jul 5, 1994
Grant Date -
N/A
app pub date -
Jun 4, 1992
filing date -
Jun 4, 1992
priority date (Note) -
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Abstract
A code excited linear predictive coder and decoder well suited to speech recording, transmission and reproduction, especially in voice messaging systems, provides backward adaptive gain control of stored codevectors to be applied to a synthesis filter prior to being compared with sequences of input speech signals. Simplified linear predictive parameter quantization using efficient table lookup procedures, efficient codevector storage and search all contribute in an illustrative embodiment to high quality coding and decoding with reduced computational complexity.
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