但是，在实际中发现，用某种“特定”方法连接起来的最优信源编码器和信道编码器，并不一定能构成最佳通信系统。

But, it may be not a optimum system using an "AD hoc" method to combine the optimum source with channel coders in practical communication systems.

youdao

由于传输环境的剧烈变化，移动通信系统不能工作在最佳的信源编码速率和信道编码速率。

Due to the intense change of the transmission environment, the mobile communication system can not work in the optimal source coding rate and channel coding rate.

youdao

由于传输环境的剧烈变化，移动通信系统不能工作在最佳的信源编码速率和信道编码速率。

Due to the intense change of the transmission environment, the mobile communication system can not work in the optimal source coding rate and channel coding rate.

youdao