| 摘要 |
PROBLEM TO BE SOLVED: To provide teleconference equipment in which the scale of hardware is reduced, only the conversation sound is made conspicuous correctly, and echo sound can be canceled with high precision. SOLUTION: A branch circuit 13 detects the signal of conversation sound from the voice signal of a plurality of channels and branches the signal to a false echo circuit 17. A controller 16 controls a regulation circuit 14 such that the signal of conversation sound is pronounced from a speaker 10 close to a microphone 11 and controls an amplifier 15 to amplify the signal of conversation sound. The controller 16 controls to bundle the signals of non-conversation sound and pronounce it from a speaker 10 remote from the microphone 11 and controls an amplifier 15 to attenuate the signal of non-conversation sound. Consequently, only the conversation sound is made conspicuous correctly through a small scale hardware, and echo sound can be canceled with high precision. COPYRIGHT: (C)2008,JPO&INPIT |
