计算机工程与科学2013，Vol.35Issue(4)：81-86,6.DOI:10.3969/j.issn.1007-130X.2013.04.015
基于纹理特征的H.264/AVC帧内预测模式快速选择算法
Fast intra-prediction mode selection algorithm for H.264/AVC based on texture
摘要
Abstract
Intra-frame encoding in H. 264/AVC video standard usually adopts Rate Distortion Optimization (RDO) technique. By computing all possible coding modes, the one which has the lowest cost of rate distortion is selected as the best mode. The RDO technique improves the reliability, accuracy and error resilience of encoding while increasing the complexity and search time of the encoding. The residual value between the current and reconstructed 4X4 block is calculated in the circumstances of analyzing the standard intra-prediction. If the value is smaller than a certain threshold the macro block coding can be ended in advance. Conversely, a fast 4×4 intra-prediction mode selection algorithm was proposed by utilizing the correlation between the texture direction of block and the choice of predict modes. Based on the improved Canny operator and square gradient method, this algorithm extracts the texture of the current block and analyzes the corresponding relations between texture direction and the predict modes in detail. Experiments were carried out on the reference model JM13. 2 of H. 264/AVC. The results show that, compared with the standard algorithm, the encoding time is substantially declined in the case of keeping the bit rate and the PSNR are nearly unchanged.关键词
H.264/AVC/帧内预测/Canny算子/平方梯度/纹理方向Key words
H. 264/AVC/intra-prediction/Canny operator/square gradient/texture direction分类
信息技术与安全科学引用本文复制引用
张小红,张媛..基于纹理特征的H.264/AVC帧内预测模式快速选择算法[J].计算机工程与科学,2013,35(4):81-86,6.基金项目
国家自然科学基金资助项目(11062002) （11062002）
江西省自然科学基金资助项目(2010GZS0083,20122BAB211019) （2010GZS0083,20122BAB211019）
