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分级视频编码中宏块相关性快速模式决策

Fast mode decision of macroblock correlation within Scalable Video Coding
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摘要 为降低空时分级视频编码中自适应层间预测模式的计算复杂度,利用增强层中时域宏块相关性的特点,提出一种随时间等级变化的快速模式决策算法。该算法将参考宏块使用过的模式按照其率失真优化代价排序,选择其中代价较小的模式作为当前宏块的动态备选方案,从而有效地提高编码效率。在JSVM上的实验结果表明,同原有非优化决策算法相比,在PSNR平均降低0.0148dB、比特率增加0.55%的情况下,该优化算法使得平均编码时间减少21.67%。 To reduce the computation complexity of adaptive inter-layer prediction within spatial and temporal scalable video coding,a fast mode decision algorithm is proposed by exploiting the macroblock correlation of temporal level in enhancement layers.This algorithm recomposes a dynamic candidate mode group for the current macroblock from the used modes of co-located reference macroblocks which are sort-ordered by rate distortion cost in order to improve the encoding efficient.Experimental results on JSVM demonstrate that the proposed algorithm can achieve a reduction of 21.67% encoding time on average,with a negligible average PSNR loss of 0.014 8 dB and a 0.55% bit rate increasing.
出处 《计算机工程与应用》 CSCD 北大核心 2009年第28期24-26,共3页 Computer Engineering and Applications
基金 黑龙江省自然科学基金~~
关键词 分级视频编码 自适应层间预测 快速模式决策 宏块相关性 Scalable Video Coding(SVC) adaptive inter-layer prediction fast mode decision macroblock correlation
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参考文献5

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二级参考文献4

  • 1Wiegand T, Sullivan G, Reichel J, et al. Scalable Video Coding-joint Draft 6[S]. ISO/IEC JTC1/SC29/WGll & ITU-T SG16 Q.6, JVT-S201. 2006.
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