为了从接收到的PCM码中还原出原始信号，阐述了一种由硬件实现帧同步，由串并转换器完成PCM码解调器的高速PCM码解调器电路。

This paper presents a high speed PCM demodulation circuit through which the serial parallel converter plays a role of demodulating and the hardware realizes frame synchronization.

youdao

接着，给接收到的异步蜂窝式通信信号的帧边界加时间标记。

Then a frame boundary of a received asynchronous cellular communication signal is time-tagged.

youdao

因此，在某些传输模式中，可能需要超过130毫秒来接收一个完整帧，故会延迟所接收的视频信号的解码与解调。

Thus, in some transmission modes, it may take more than 130 milliseconds to receive a complete frame, thereby delaying decoding and demodulation of the received video signal.

youdao