TARGET SOUND DETECTION METHOD, SOUND SIGNAL PROCESSING APPARATUS, VOICE RECOGNITION DEVICE, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To build a sound reception system robust against an environmental change due to a change in the mounting positions of microphones and the movement of a sound source due to a change etc., of the movement and attitude of a speaker. SOLUTION: The voice signal processing apparatus is equipped with a unidirectional microphone 1 arranged to receive the sound of either utterance sound or noise, the nondirectional microphone 2 arranged to receive the utterance sound and the noise, frame structuring sections 11 and 12 and cross correlation function calculating section 13 for calculating the cross correlation function Rxy(t) between a voice signal x(t) inputted to the unidirectional microphone 1 and the voice signal y(t) inputted to the nondirectional microphone 2, and a voice/no-voice judging section 14 for judging the utterance section of the speaker based on the cross correlation function Rxy(t) calculated by the cross correlation function calculating section 13. COPYRIGHT: (C)2005,JPO&NCIPI