Novel intra prediction coding using similarity of reference pixels

Computer Engineering and Applications ›› 2011, Vol. 47 ›› Issue (10): 20-22.

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Novel intra prediction coding using similarity of reference pixels

LAI Changcai1，JIANG Jie2，WU Xianxiang2

1.Advanced Research Department，Huawei HiSilicon Technologies，Shenzhen，Guangdong 518129，China
2.Institute of Intelligence Control and Image Engineering，Xidian University，Xi’an 710071，China

Received:1900-01-01 Revised:1900-01-01 Online:2011-04-01 Published:2011-04-01

利用参考像素相似度检测的帧内预测编码

赖昌材1，蒋洁2，吴宪祥2

1.华为海思研究部，广东深圳 518129
2.西安电子科技大学智能控制与图像处理研究所，西安 710071

Abstract

Abstract: A novel intra prediction algorithm is proposed to improve the coding efficiency.The proposed method judges the overall similarity of the prediction pixels：In the case of high similarity，the Direct Current（DC） only mode is used，and it adaptively skips the prediction mode bits，which not only improves the coding efficiency，but also reduces the encoding complexity; otherwise，all the directional prediction modes are used and one of them is selected through RDO（Rate-Distortion Optimization） in H.264/AVC.Experimental results show that the proposed method achieves an average bit-rate reduction of 1.42% and encoding time reduction of 32.2% with the same Peak Signal Noise Ratio（PSNR）.

Key words: H.264/AVC, intra prediction, coding efficiency, Rate-Distortion Optimization（RDO）

摘要： 为进一步提高帧内预测的编码性能，提出一种新的帧内预测算法。算法对用于预测的参考像素进行相似度检测，当参考像素相似度高时，直接使用平均模式预测，省略了用于编码预测模式的比特，节省了码率，并减少了用于率失真优化所需的计算量，降低了计算复杂度；在各参考像素差异较大时，则按H.264/AVC中率失真优化的方法进行模式选择。实验结果表明，该算法在同样的峰值信噪比（PSNR）下，平均码率降低1.42%，编码速度提高了32.2%。

关键词: H.264/AVC标准, 帧内预测, 编码效率, 率失真优化

LAI Changcai1，JIANG Jie2，WU Xianxiang2. Novel intra prediction coding using similarity of reference pixels[J]. Computer Engineering and Applications, 2011, 47(10): 20-22.

赖昌材1，蒋洁2，吴宪祥2. 利用参考像素相似度检测的帧内预测编码[J]. 计算机工程与应用, 2011, 47(10): 20-22.

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Novel intra prediction coding using similarity of reference pixels

利用参考像素相似度检测的帧内预测编码

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