回声消除器的基本组成部分是一个自适应滤波器，和一个双向通话检测器。
The basic components of an echo canceller are an adaptive filter, and a double-talk detector.
双向通话：内置通讯模块，随时实现双向通话，内置高保真扬声器，方便老人使用。
Dual-way talking: In-built communication module realizes dual-way talking in real time and in-built high-fidelity speaker is convenient for use by the elder.
可视电话就是一种点到点的多媒体通信平台，它能实时双向传输通话双方的图像和语音信号。
Viewphone is a kind of video communication terminal that base on point to point, it makes use of current telephone network to transmit real-time bi-directional video and audio.
可视电话就是一种点到点的多媒体通信平台，它能实时双向传输通话双方的图像和语音信号。
Viewphone is a kind of video communication terminal that base on point to point, it makes use of current telephone network to transmit real-time bi-directional video and audio.
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