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The Scientific World Journal
Volume 2014, Article ID 392505, 12 pages
http://dx.doi.org/10.1155/2014/392505
Research Article

Low Complexity Mode Decision for 3D-HEVC

College of Computer and Communication Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China

Received 1 May 2014; Revised 21 July 2014; Accepted 22 July 2014; Published 28 August 2014

Academic Editor: Byung-Gyu Kim

Copyright © 2014 Qiuwen Zhang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

High efficiency video coding- (HEVC-) based 3D video coding (3D-HEVC) developed by joint collaborative team on 3D video coding (JCT-3V) for multiview video and depth map is an extension of HEVC standard. In the test model of 3D-HEVC, variable coding unit (CU) size decision and disparity estimation (DE) are introduced to achieve the highest coding efficiency with the cost of very high computational complexity. In this paper, a fast mode decision algorithm based on variable size CU and DE is proposed to reduce 3D-HEVC computational complexity. The basic idea of the method is to utilize the correlations between depth map and motion activity in prediction mode where variable size CU and DE are needed, and only in these regions variable size CU and DE are enabled. Experimental results show that the proposed algorithm can save about 43% average computational complexity of 3D-HEVC while maintaining almost the same rate-distortion (RD) performance.