摘要： 为了减少视频编码中帧内预测的数据量，进一步提高帧内预测的精确度，提出一种基于对称的帧内预测模式IPMBS以及在该模式下的帧内预测编码的模式选择算法。该模式利用自然图像的对称性和图像相邻块的数据相关性进行帧内块预测，其算法综合考虑了相邻块中的若干像素，利用H.264中帧内预测编码的RD优化原则来自适应选择预测模式，达到提高预测精度以及提高压缩率的目的。基于H.264参考模型JM10.1的实验结果表明，该预测模式和算法在仅增加很少复杂性的前提下可以获得较好的压缩编码性能，并为帧内预测研究提供了新的思路。

关键词: H.264, 对称, 帧内预测模式, 基于对称的帧内预测

Abstract: In order to reduce the data of intra-prediction in video coding in H.264 and to improve the optimized selection from intra-prediction modes and the precision of the intra-prediction, this paper presents a novel intra-prediction mode. The mode is called intra-prediction mode based on symmetry(IPMBS). And the mode selection method under the IPMBS with all intra-prediction modes in the H.264 is proposed. The idea comes from symmetry of frame image and the relationship of neighboring macro blocks. It has much more samples considered, and gives an adaptive method to select the intra-prediction mode according to the rule of rate-distortion optimized. Experimental results based on the H.264 JVT reference software of JM10.1 show that the proposed intra-prediction mode and the mode selection method could achieve a better performance while maintaining little computation increase, and presents us a novel direction for intra-prediction research.

Key words: H.264, symmetry, intra-prediction mode, Intra Predctioin Mode Based on Symmetry(IPMBS)

中图分类号: 

• TP37