Speech recognition method and system using compression speech data
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United States of America Patent
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Apr 23, 2002
Issued Date -
N/A
app pub date -
Oct 5, 1999
filing date -
Jan 8, 1998
priority date (Note) -
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Abstract
A vocoder based voice recognizer recognizes a spoken word using linear prediction coding (LPC) based, vocoder data without completely reconstructing the voice data. The recognizer generates at least one energy estimate per frame of the vocoder data and searches for word boundaries in the vocoder data using the associated energy estimates. If a word is found, the LPC word parameters are extracted from the vocoder data associated with the word and recognition features are calculated from the extracted LPC word parameters. Finally, the recognition features are matched with previously stored recognition features of other words, thereby to recognize the spoken word.
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