Improving SHVC performance with a block based joint layer prediction solution
Xiem HoangVan · 2018 International Workshop on Advanced Image Technology (IWAIT) · 2018
Considering the need for a more powerful scalable video coding solution beyond the recent Scalable High Efficiency Video Coding (SHVC) standard, this paper proposes a novel SHVC improvement solution using the block based joint layer prediction creation. In the proposed improvement solution, the temporal correlation between frames is exploited through a motion compensated temporal interpolation (MCTI) mechanism. The MCTI frame is adaptively combined with the base layer reconstruction using a linear combination algorithm. In this combination, a weighting factor is defined and computed for each predicted block using the estimated errors associated to each prediction input. Finally, to achieve the highest compression efficiency, the fused frame is treated as an additional reference and adaptively selected using the rate distortion optimization (RDO) mechanism. Experiments conducted for a rich set of test conditions have shown that significant compression efficiency gains can be achieved with the proposed improvement solution, notably by up to 4.5 % BD-Rate savings on enhancement layer regarding the standard SHVC quality scalable codec.