帧内预测模式编码使用基于临近块模式的算术编码上下文。
Intra prediction mode coding is done using arithmetic coding contexts based on the modes of the neighboring blocks.
提高编码效率的技术有改进的PB帧、先进的帧内预测编码和先进的预测模式等；
Some refined coding methods, including Improved PB frames, Advanced Intra Coding and Advanced Prediction Mode, are used to improve the coding efficiency.
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