EdgeDetection Based Fast IntraMode Selection for Depth Map Coding in 3DHEVC 3DHigh Efficiency Video Coding (3DHEVC) contains more encoding viewpoints than traditional HEVC, resulting in a significant increase of coding complexity. In this paper, we propose a low complexity intramode selection algorithm to reduce the number of intramodes by detecting the flat area and texture direction of the depth map. The corresponding intraprediction modes are skipped when the flat region condition is satisfied. Otherwise, the direction of the edge is detected to decrease the number of angle modes in RMD, which can reduce the intracoding complexity and coding time cost. Experimental results demonstrate that the proposed algorithm achieves on average 36.48% time saving with negligible degradation of coding performance.

Fast Intra size decision and mode decision algorithm for HEVC intra coding The latest High Efficiency Video Coding (HEVC) standard could achieve much higher coding efficiency than the current mainstream video coding standards (H.264AVC). Compared with H.264AVC, H.265 saves 50% cost than H.264AVC at the same quality. But compression ratio gets improved with at least 24 times increase in computational complexity. HEVC provides a quadtree based coding unit (CU) block partitioning structure. The predication mode of CU has been extended from 8 to 35. To alleviate the encoder computational complexity, we proposed an algorithm based on complexity of CU and cart decision tree to determine whether the current CU should be divided into quadtree. In the mode decision process, we reduce the number of candidate modes involved in the rough mode decision(RMD) and the rate distortion optimization (RDO) process. The experiment results demonstrate that the proposed algorithm could significantly reduce compression time with little loss.