针对这一问题，提出了一个新的基于率失真理论的优化方法，称为最优系数调整法。

In accordance with this, a novel optimum method based on rate distortion theory called optimal coefficient adjustment is presented.

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与标准的率失真(PCRD)优化算法相比，该算法不会在计算码率失真斜率和搜索最优分层截断点时产生运算开销。

Compared with the standard post-coding rate distortion (PCRD) algorithm, the proposed algorithm has no spending in calculating rate-distortion slope and searching for optimum truncation points.

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为了得到最优模式，H . 264采用了率失真优化(rdo)技术计算宏块的每种模式的代价，但是这样增加了计算复杂度。

In order to gain the optimal mode, H. 264 adopts Rate Distortion Optimization (RDO) technique to compute the cost of every mode for each macroblock, but it increases computational complexity.

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