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Hierarchical Structure-Based Fast Mode Decision for H.265/HEVC.
- Source :
-
IEEE Transactions on Circuits & Systems for Video Technology . Oct2015, Vol. 25 Issue 10, p1651-1664. 14p. - Publication Year :
- 2015
-
Abstract
- The mode decision strategy adopted in the High Efficiency Video Coding test model increases the complexity drastically. In this paper, we present a course of low-complexity fast mode decision algorithms. First, the depth information of the colocated block from a previous frame is used to predict the size of current block. Next, for a certain sized block, the inter-prediction residual is analyzed to determine whether to terminate the mode decision process or to skip unnecessary modes and split the block into smaller sizes. After inter-prediction, a hardware-oriented low-complexity fast intra-mode decision algorithm is proposed. A fast discrete cross difference is adopted to detect the dominant direction of the block. In addition, four simple but efficient early termination strategies are proposed to terminate the rate-distortion optimization process properly. The simulation results show that these proposed algorithms reduce the encoding time by 54.0%–68.4% without incurring any noticeable performance degradation. Hardware synthesis results demonstrate that the proposed fast intra-mode decision algorithm can be easily implemented on a hardware platform with fewer resources consumed. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 10518215
- Volume :
- 25
- Issue :
- 10
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Circuits & Systems for Video Technology
- Publication Type :
- Academic Journal
- Accession number :
- 110171967
- Full Text :
- https://doi.org/10.1109/TCSVT.2015.2395751