MULTI-CHANNEL ECHO CANCELLER, METHOD, RECORDING MEDIUM AND VOICE COMMUNICATION SYSTEM

PROBLEM TO BE SOLVED: To provide a multi-channel echo canceller, that estimates echo path without deteriorating the voice quality of received signal to cancel echo, and to provide its method, a recording medium and a voice communication system. SOLUTION: The multi-channel echo canceller is provided...

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Bibliographische Detailangaben
1. Verfasser:	TERADA YASUHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	ACOUSTICS DEAF-AID SETS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS MUSICAL INSTRUMENTS PHYSICS PUBLIC ADDRESS SYSTEMS SPEECH ANALYSIS OR SYNTHESIS SPEECH OR AUDIO CODING OR DECODING SPEECH OR VOICE PROCESSING SPEECH RECOGNITION TRANSMISSION
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a multi-channel echo canceller, that estimates echo path without deteriorating the voice quality of received signal to cancel echo, and to provide its method, a recording medium and a voice communication system. SOLUTION: The multi-channel echo canceller is provided with speakers 103i whose number is equal to the number of channels, 1st voice detection sections 106i that detect voice from a received signal, a non-correlated signal attaching section 102, that attaches a signal being in non-correlation among channels to a received signal of each channel, an adaptive filter 101 that uses the received signal, to which the non-correlated signal is attached for estimating the echo path between the speakers and the microphones, and a subtractor section 105 that subtracts pseudo-echoes from a microphone input signal.