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专利名称：Input/output apparatus and communication
terminal
发明人：Ryoji Suzuki申请号：US13622027申请日：20120918公开号：US08526599B2公开日：20130903
专利附图：
摘要：An input/output apparatus includes a speaker, a microphone, an adaptive filtercircuit and a control circuit. The speaker is configured to output audio based on a voice-receiving signal. The microphone is configured to produce a voice-transmitting signal
based on gathered audio. The adaptive filter circuit is configured to produce a residualsignal based on a pseudo echo signal and a amplified voice-transmitting signal. Thepseudo echo signal is produced from the voice-receiving signal and a transfer coefficientwhich expresses audio transfer properties between the speaker and the microphone. Theamplified voice-transmitting signal is produced by causing a microphone amplificationcircuit to amplify the voice-transmitting signal. The control circuit is configured to stopoutput of the residual signal from the adaptive filter circuit during at least one of thespeaker and the microphone is muted.
申请人：Panasonic Corporation
地址：Osaka JP
国籍：JP
代理机构：Wenderoth, Lind & Ponack, L.L.P.
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