Speech recognition method and speech recognition apparatus
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United States of America Patent
Stats
-
May 23, 2000
Grant Date -
N/A
app pub date -
Oct 22, 1998
filing date -
Oct 23, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A speech recognition method of recognizing an input speech in a noisy environment by using a plurality of clean speech models is provided. Each of the clean speech models has a clean speech feature parameter S representing a cepstrum parameter of a clean speech thereof. The speech recognition method has the processes of: detecting a noise feature parameter N representing a cepstrum parameter of a noise in the noisy environment, immediately before the input speech is input; detecting an input speech feature parameter X representing a cepstrum parameter of the input speech in the noisy environment; calculating a modified clean speech feature parameter Y according to a following equation: Y=k.multidot.S+(1-k).multidot.N (0
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