扩频通信是指在发送端将信号的频谱扩展到一个很宽的频带上，在接收端通过相关接收，将信号恢复到信息带宽的一种系统。
The SS communication is a system that the spectrum of signal is spreaded in a wide frequency band when transmitted, and is recovered by the correlation reception when received.
通过文档与信息的分离，还可以加快速度并节省带宽。
By separating the information from the document, you can also speed things up and save some bandwidth.
通过分析信号的局部特性，应用程序就可以增强影像或者找出并删除多余的信息来节省内存或带宽。
By analyzing local properties of the signal, the application could, for instance, sharpen frames of video, or look for redundant information that can be removed to save memory or bandwidth.
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