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US08238547B2 Sound pickup apparatus and echo cancellation processing method 失效
拾音装置和回声消除处理方法

Sound pickup apparatus and echo cancellation processing method
Abstract:
A sound pickup apparatus selecting one of a plurality of microphones and performing echo cancellation processing for a plurality of microphones with an echo canceller to output a sound. The sound pickup apparatus sets a “learning mode” when the power supply is turned on, outputs a calibration sound from an echo cancellation calibration sound generator via a speaker, detects an echo at that time with a microphone and obtains an echo cancellation use parameter canceling the echo.
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