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.
因此，几乎每一个视频标准都相应有自己的一个或者多个码率控制策略。
Therefore, almost every video coding standard has one rate control strategy and even more.
文章提出一种新的场景变换检测算法，进一步给出一种新的码率控制策略。
This proposes a new scene change detection algorithm, and also proposes a rate control scheme.
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