Fast Algorithm for Intra Prediction in Quality SHVC
Jing Zuo, Qiang Li · 2019
In order to reduce the coding complexity of quality Scalable High efficiency Video Coding (SHVC), a fast algorithm of intra prediction is proposed. Frist, inter-layer correlation and spatial correlation are combined to predict the coding unit depth range of the enhancement layer. Then, at each depth level, the residual coefficients are tested by Jarque-Bera to determine whether the inter layer reference mode is the optimal mode. If the inter layer reference mode is the optimal mode, the high-complexity intra prediction can be skipped directly. Finally, in order to terminate the depth division ahead of time, hypothesis tests are performed to determine whether the residual coefficients in the coding unit show significant differences. The experimental results demonstrate that compared with standard SHVC encoder, the proposed algorithm reduces the coding time of enhancement layer by 80% on average with almost the same coding efficiency.