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文章对H.264/AVC中可变尺寸帧间预测块模式决策进行了深入研究。首先对JM8.4程序所采用的全搜索模式决策方法的步骤及率失真优化策略进行了分析。然后将目前已提出的优化方法归类,并重点介绍和阐述了几种典型方法的理论依据以及决策思路。在理清思路的基础上,总结、归纳各类方法的优化思路,并比较了其优缺点,提出了最佳优化策略。
The article makes an in-depth research on the decision-making of variable-size inter-prediction block in H.264 / AVC. Firstly, the steps of the full search mode decision method adopted by JM8.4 and the rate-distortion optimization strategy are analyzed. Then, the optimization methods that have been proposed so far are classified, and the theoretical basis and decision-making ideas of several typical methods are mainly introduced and elaborated. On the basis of sorting out the ideas, the author summarizes and summarizes the optimization methods of all kinds of methods, compares their advantages and disadvantages, and puts forward the best optimization strategy.