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Novel H.264/AVC entropy coding mode decision

机译:新的H.264 / AVC熵编码模式决策

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摘要

In this work, we propose a novel entropy coding mode decision algorithm to balance the tradeoff between the rate-distortion (R-D) performance and the entropy decoding complexity for the H.264/ AVC video coding standard. Context-based adaptive binary arithmetic coding (CABAC), context-based adaptive variable length coding (CAVLC), and universal variable length coding (UVLC) are three entropy coding tools adopted by H.264/AVC. CABAC can be used to encode the texture and the header data while CAVLC and UVLC are employed to encode the texture and the header data, respectively. Although CABAC can provide better R-D performance than CAVLC/UVLC, its decoding complexity is higher. Thus, by taking the entropy decoding complexity into account, CABAC may not be the best tool, which motivates us to examine the entropy coding mode decision problem in depth. It will be shown experimentally that the proposed mode decision algorithm can help the encoder generate the bit streams that can be decoded at much lower complexity with little R-D performance loss.
机译:在这项工作中,我们提出了一种新颖的熵编码模式决策算法,以在H.264 / AVC视频编码标准的速率失真(R-D)性能和熵解码复杂度之间取得平衡。基于上下文的自适应二进制算术编码(CABAC),基于上下文的自适应可变长度编码(CAVLC)和通用可变长度编码(UVLC)是H.264 / AVC采用的三种熵编码工具。 CABAC可用于编码纹理和标头数据,而CAVLC和UVLC分别用于编码纹理和标头数据。尽管CABAC可以提供比CAVLC / UVLC更好的R-D性能,但其解码复杂度更高。因此,通过考虑熵解码的复杂性,CABAC可能不是最好的工具,这促使我们深入研究熵编码模式决策问题。从实验上可以看出,所提出的模式决策算法可以帮助编码器生成比特流,这些比特流可以以低得多的复杂度进行解码,而几乎没有R-D性能损失。

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