Fast Inter Mode Predictions for SHVC
Dayong Wang, Yu Sun, Weisheng Li, Ce Zhu, Fréderic Dufaux · 2019
The Scalable High Efficiency Video Coding (SHVC) has very high coding efficiency, but its computational complexity is also very high. This definitely limits its wide applications, particularly for real-time video applications. Therefore, it is crucial to improve the coding speed. In this research, we have proposed a new inter mode prediction algorithm for quality SHVC, in order to improve the coding speed while maintaining coding efficiency. First, we divide mode prediction into square mode prediction and non-square mode prediction. Second, in the square mode prediction, Inter-Layer Reference (ILR) and merge modes are predicted based on depth correlation. Moreover, ILR mode, merge mode and inter 2N×2N are early terminated based on Rate Distortion (RD) cost. Third, if the early termination condition cannot be satisfied, nonsquare modes are further predicted based on the distribution of residual coef-ficients. Experimental results have demonstrated that the proposed algorithm can significantly improve the coding speed with negligible coding efficiency loss.