Patent ID: 7478041
Filing Date: 2009-01-13
Classification: G10L

Abstract:
1. A speech recognition apparatus comprising: a microphone array, comprising at least three microphones, each microphone measuring a delay and a sum of peak power for each of a plurality of angles from a horizontal axis and from a vertical axis in response to a white noise source located at a plurality of locations about said microphone array; a first directional sound source profile database for storing a plurality of first directional sound source profiles, each of said plurality of first directional sound source profiles determining a first direction sound source profile for each of said plurality of locations based on said measuring; a target location for said microphone array, where a voice and noise are recorded; a noise suppressor, receiving a voice signal and a noise signal recorded at said target location by said microphone array, said noise suppressor comprising: a spectrum reconstruction unit that receives said power of only a voice signal for each of said plurality of frequency bands for reconstructing said power of only a voice recorded at said target location; and an output device that outputs said reconstruction of said power of only a voice recorded at said target location as a voice recording, without noise, from said target location.