另一方面，对于视频序列中的第一隔行扫描视频帧，解码器解码第一隔行扫描视频帧的帧层处用信号表示的位平面。
In another aspect, for a first interlaced scanning video frame in a video sequence, a decoder decodes a bitplane signaled at frame layer for the first interlaced video frame.
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.
这些层可以被动态的增加或删除，你也可以对这些层进行改动，因为每层都有一个轨道，你可以在轨道中的特定时间点加入关键帧到达改变动画的目的。
These layers and be added or removed dynamically and you can change each layer as it has a track that lets you change it as a function of time by inserting keys at certain frames in the track.
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