Speech recognition system

Details Speech recognition system Speech recognition system

G - Physics

10

L

354/50

G10L 1/00 (1980.01)

Patent

CA 1127764

Abstract of the Disclosure In a speech recognition system for programming or commanding computers and other machines, there is described a recognition system which is less susceptible to breathing and other background noises. Speech-like signal durations are detected from input signal waves from all sources. The waveforms of the input signals are analyzed and recognition parameters are extracted. A spectral change detecting unit detects the magnitude of short- time spectral changes from the speech-like signal durations, determining thereby whether the speech-like signal is speech. A recognition unit re- cognizes speech patterns from signals within the speech-like signal durations and rejects those signals which the spectral-change detecting unit indicates do not contain speech. The parameter extracting means and the spectral change detecting unit receive controlling signals from a control unit.

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