Thanks to noise-cancelling and echo-reducing technology, call quality is sharp and clear, and it will automatically pause whatever music you’re listening to when a call comes in .
IntroductionIn the communication systems, echo and noise will seriously affect speech communication quality, such as IP telephone, videophone and hand-free digital cell phone systems etc.
引言在通信系统中，例如IP电话、可视电话及免提数字蜂窝电话系统中，回声和噪声会严重影响通信质量。
3
In the thesis, the video echo of the airborne PD radar was simulated. The simulated echoes include the signals of the target, the ground clutter and the noise.