一种基于二维直方图的H.264/AVC快速帧内预测判决算法

谢晶; 贾克斌

一种基于二维直方图的H.264/AVC快速帧内预测判决算法

谢晶,
贾克斌

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出版历程
- 收稿日期: 2004-11-29
- 修回日期: 2004-04-07
- 刊出日期: 2005-07-19

A Fast Intra-frame Prediction Algorithm Based on Two-Dimensional Histogram for H.264/AVC

摘要

摘要: 最新的视频压缩标准H.264/AVC具有极高的压缩率,但由于其算法极其复杂,编码时间较长,无法达到实时应用的要求。该文针对其帧内预测算法的特点,提出了一种基于二维直方图的快速帧内预测算法。该算法在进行帧内预测之前先对宏块预判,从两种帧内预测模式中选择一种,从而减少了算法的复杂度,提高了压缩速度。实验结果表明,所提的算法在码率只有少许增加的情况下,编码速度提高了16.26%,PSNR值基本不变。
- 编码; H.264/AVC; 帧内预测; 二维直方图
Abstract: H.264/AVC is the newest video coding standard with high compression efficiency. Because it will take a long time to code with extremely complex algorithm, it can not achieve real-time application. In this paper, according to the characteristic of intra-frame prediction algorithm, a fast algorithm based on 2D-histogram is proposed. This algorithm will predict every macroblock before coding, then selecting one of the two prediction modes. Therefore, the complexity of algorithm and coding time are reduced dramatically. Experimental results show that the coding speed of proposed algorithm is 16.26% faster than that of H.264/AVC, with a little bit increase, and the PSNR is invariable.

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参考文献(1)

Joint video team (JVT) of ITU-T VCEG and ISO/IEC MPEG.Final draft international standard of joint video specification[S](ITU-T Rec. H.264/ISO/IEC 14496-10). JVT-G050, 05, 2003.[2]Wiegand T, Gary J, Sullivan G J, et al.. Overview of the H.264/AVC video coding standard. IEEE Trans. on Circuits and Systems for Video Technology, 2003, 13(7): 560 - 576.[3]Pan Feng, Lin Xiao, et al.. Fast mode decision for intra prediction.JVT-G013 in ISO/IEC JTC1/SC29/WG11 and ITU-T SG16 Q.6,JVT 7th Meeting, Pattaya, Thailand, March 2003.Meng Bojun.[J].Au O C, et al.. Efficient intra-prediction mode selection for 44 blocks in H.264. In ICME03 Proceedings of the 2003 International Conference on Multimedia and Expo,Baltimore, Maryland.2003,:-Changsung K, Qing L, Jay K. Fast intra-prediction model selection for H.264 codec. In SPIE International Symposium ITCOM 2003, Orlando, Florida, July 2003.[4]Teng Chia-Yuan. An improved block prediction mode for H.264/AVC intra-frame prediction. In Proceedings of Data Compression Conference, Snowbird, Utah, 2004:569 - 569.[5]Meng Bojun, Au O C. Efficient intra-prediction algorithm in H.264. In Proceedings of the 2003 International Conference on Image Processing, Barcelona, Spain, 2003, vol.3:837 - 840.[6]甑文智,范九伦,谢维信.基于二维直方图的图像模糊聚类分割新方法.计算机工程与应用,2003,15(39):86-88.[7]李弼程,柳葆芳.基于二维直方图的模糊门限分割方法.数据采集与处理,2000,3(15):324-329.[8]Horowitz M, Joch A, Kossentini F, Hallapuro A. H.264/AVC baseline profile decoder complexity analysis[J].IEEE Trans. on Circuits and Systems for Video Technology.2003, 13(7):704-716

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