Hardware-oriented fast mode decision algorithm for intra prediction in HEVC
Hardware-oriented fast mode decision algorithm for intra prediction in HEVC
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DOI：
10.1109/pcs.2013.6737695
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发表时间：
2013-12
期刊：
影响因子：
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通讯作者：
Wenjun Zhao;T. Onoye;Tian Song
中科院分区：
文献类型：
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作者：
Wenjun Zhao;T. Onoye;Tian Song
提出了一种面向硬件的低复杂度快速帧内预测算法。该算法采用快速的离散交叉差分（DCD）检测编码单元的主导方向。基于DCD信息，仅选择35个候选模式的子集用于粗略模式决策过程。此外，四个简单而有效的提前终止策略，提出了正确终止RDO过程。复杂度分析结果表明，该算法易于在硬件平台上实现，占用资源少。仿真结果表明，该算法平均减少了66%的编码时间，比特率增加约3.9%，PSNR降低约0.18dB。
In this paper, a hardware-oriented low complexity fast intra prediction algorithm is presented. The proposed algorithm adopts a fast Discrete Cross Differences (DCD) to detect the dominate direction of the coding unit. Based on DCD information, only a subset of the 35 candidate modes are selected for the rough mode decision process. Moreover, four simple but efficient early termination strategies are proposed to terminate the RDO process properly. Complexity analysis results demonstrate that the proposed algorithm can be easily implemented on hardware platform with fewer resources consumed. Simulation results show that the proposed algorithm reduce the encoding time by 66% on average, requiring bit-rate increase about 3.9% and PSNR decrease about 0.18dB, respectively.