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Probable mode prediction for H.264 advanced video coding P slices using removable SKIP mode distortion estimation

机译:使用可移动SKIP模式失真估计的H.264高级视频编码P切片的可能模式预测

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摘要

The H.264/AVC (advanced video coding) is used in a wide variety of applications including digital broadcasting and mobile applications, because of its high compression efficiency. The variable block mode scheme in H.264/AVC contributes much to its high compression efficiency but causes a selection problem. In general, rate-distortion optimization (RDO) is the optimal mode selection strategy, but it is computationally intensive. For this reason, the H.264/AVC encoder requires a fast mode selection algorithm for use in applications that require low-power and real-time processing. A probable mode prediction algorithm for the H.264/AVC encoder is proposed. To reduce the computational complexity of RDO, the proposed method selects probable modes among all allowed block modes using removable SKIP mode distortion estimation. Removable SKIP mode distortion is used to estimate whether or not a further divided block mode is appropriate for a macrob-lock. It is calculated using a no-motion reference block with a few computations. Then the proposed method reduces complexity by performing the RDO process only for probable modes. Experimental results show that the proposed algorithm can reduce encoding time by an average of 55.22% without significant visual quality degradation and increased bit rate.
机译:H.264 / AVC(高级视频编码)由于其高压缩效率而被广泛用于包括数字广播和移动应用在内的各种应用中。 H.264 / AVC中的可变块模式方案对其高压缩效率做出了很大贡献,但会引起选择问题。通常,速率失真优化(RDO)是最佳的模式选择策略,但它的计算量很大。因此,H.264 / AVC编码器需要一种快速模式选择算法,以用于需要低功耗和实时处理的应用中。提出了一种H.264 / AVC编码器可能的模式预测算法。为了降低RDO的计算复杂度,该方法使用可移动的SKIP模式失真估计在所有允许的块模式中选择可能的模式。可移动的跳过模式失真用于估计进一步划分的块模式是否适合宏块。它是通过不运动的参考块和少量计算来计算的。然后,所提出的方法通过仅针对可能模式执行RDO过程来降低复杂度。实验结果表明,该算法可将编码时间平均减少55.22%,而视觉质量不会明显下降,比特率也不会增加。

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