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.
针对H . 264码率控制模型的不足，提出了一种新的宏块层的码率控制算法。
For the lack of rate control model in H. 264, a new macro-block layer rate control algorithm for H. 264 is proposed.
论文重点讨论了无线网络中基于TMN11的改进型帧率控制算法及改进型宏块层码率控制算法。
This article discusses the modified frame rate control algorithm based on TMN11 and the modified macroblock-layer rate control algorithm.
同时，论文提出的码率控制算法还对宏块层的率失真优化过程做了改进，根据每个宏块的预测目标比特数来调整率失真优化的拉格朗日系数，使帧层码率控制效果更优。
At the same time, this paper also improves the process of RDO in the macroblock layer. Based on the prediction bits of the macroblock, the Lagrange coefficient has been modified adaptively.
所述方法包括以下步骤：定义由非交叠宏块组成的虚拟结构，称为虚拟基础层宏块；
The method comprises the following steps:- defining a virtual structure made up of non overlapping macroblocks, called virtual base layer macroblocks;
所述方法包括以下步骤：定义由非交叠宏块组成的虚拟结构，称为虚拟基础层宏块；
The method comprises the following steps:- defining a virtual structure made up of non overlapping macroblocks, called virtual base layer macroblocks;
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