ECHO, NOISE SUPPRESSING METHOD AND MULTI-CHANNEL LOUD-SPEAKING SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a multi-channel loud-speaking device for matching the actual direction of a target sound source with a sound image localizing direction, and for suppressing a noise and echo at the same time.

SOLUTION: A main microphone array is configured of microphones 2021to 202M, and a slave microphone array is configured of microphones 2121to 212M. A filter coefficient deciding part 200 in a circuit at the main microphone array side decides the coefficients of sound collecting filters 2031to 203Mand receiving filters 2041and 2042at the main microphone array side circuit. A receiving filter coefficient deciding part 210 in a circuit at the slave microphone array side copies the sound collecting filters transferred from the filter coefficient deciding part 200, and calculates the coefficients of the receiving filters 2141and 2142under conditions that echo components in the transmission signal are suppressed.

COPYRIGHT: (C)2005,JPO&NCIPI