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    • 2. 发明申请
    • Echo control retrofit
    • 回声控制改造
    • US20090067637A1
    • 2009-03-12
    • US10455599
    • 2003-06-04
    • Lawrence GollbachSteven F. Burson
    • Lawrence GollbachSteven F. Burson
    • H04B3/20
    • H04M9/085
    • The present invention provides an echo control retrofit apparatus and method that advantageously reduces echo when communicating over packet-switched networks. An echo control retrofit apparatus, including an echo control circuit, is operably coupled between a headset or handset device and an audio source. The echo control circuit receives a sound signal from the audio source and a transmit signal from the headset or handset device and provides an adjusted sound signal to the audio source. Advantageously, a variety of existing headsets and handsets may be used in accordance with the present invention to provide reduced caller echo without the need to purchase new headsets or handsets.
    • 本发明提供了一种在通过分组交换网络通信时有利地减少回波的回波控制改进装置和方法。 包括回波控制电路的回波控制改进装置可操作地耦合在头戴式耳机或听筒装置和音频源之间。 回波控制电路接收来自音频源的声音信号和来自耳机或手持设备的发送信号,并向音频源提供经调整的声音信号。 有利地,可以根据本发明使用各种现有的耳机和手机,以提供减少的呼叫者回音,而不需要购买新的耳机或手机。