复杂度提升主要是由于引入了率失真优化策略遍历所有编码模式。

This mainly because of the introduction of radio distortion optimization strategy and traverse all of the coding modes.

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首先对JM 8.4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。

The full search decision method and rate distortion optimization strategy of JM8.4 code were analyzed firstly.

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