至少选择一个目标比特率，然后继续。

Select at least one target bit rate before continuing.

youdao

然后，采用宏块层码率控制策略来分配目标比特；

Secondly, macroblock layer rate control strategy is used to distribute target bits.

youdao

针对异步视频对象编码，提出了一种速率控制算法，以达到恒定目标比特率。

This paper proposes a new rate control algorithm which can achieve a constant bit rate when coding asynchronous video objects.

youdao