The switchover to digital signal by 2012 means that multichannel choice will soon be available to almost all households.
2012年，英国将完成模拟信号向数字信号的转换，这就意味着几乎每家每户都可自由选择多种频道。
The data acquisition subsystem based on AT89C51 acquires multichannel acoustic signal synchronistically and stores digital signals in the Shared memory.
基于单片机at89c51的数据采集子系统完成对多路声信号的同步采集，并把数字信号保存到片外共享存储器中。
应用推荐