Fast enhancement layer intra coding based on inter-channel correlations and TU depth correlation in SHVC
Fast enhancement layer intra coding based on inter-channel correlations and TU depth correlation in SHVC
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DOI：
10.1109/cspa.2016.7515802
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发表时间：
2016-03
期刊：
影响因子：
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通讯作者：
Guojing Zhu;Gaoxing Chen;T. Ikenaga
中科院分区：
文献类型：
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作者：
Guojing Zhu;Gaoxing Chen;T. Ikenaga
高效率视频译码（SHVC）的可缩放扩展现在正由视频联合合作小组（JCT-VC）开发。在SHVC中，增强层（EL）针对不同的颜色分量（即，一个亮度（luma）和两个色度（chroma）颜色分量）采用与基础层（BL）相同的编码方法，这导致了沉重的计算成本。提出了一种适用于SHVC全帧内配置的快速EL亮度和色度帧内编码算法。利用来自不同层的不同颜色通道之间的预测模式和变换单元（TU）深度的相关性来简化EL中的帧内预测过程。实验结果表明，与SHVC测试模型（SHM）8.0相比，All intra 2x和1.5x分别节省了约30%和27%的编码时间，而BD率下降了0.4%和-0.1%。
The scalable extension of High Efficiency Video Coding (SHVC) is now being developed by the Joint Collaborative Team on Video (JCT-VC). In SHVC, the enhancement layer (EL) employs the same coding methods as the base layer (BL) for different color components, namely one luminance (luma) and two chrominance (chroma) color components, which causes heavy computation cost. This paper proposes a fast EL luma and chroma intra coding algorithm for all intra configuration in SHVC. The correlation of prediction modes and transform unit (TU) depth between different color channels from different layers are exploited to simplify the intra prediction process in EL. Experimental results show that approximately 30% and 27% encoding time can be saved in All intra 2x and 1.5x respectively, while the BD-rate degradation are 0.4% and -0.1% compared with SHVC Test Model (SHM) 8.0.