DCT域HEVC帧内预测模式映射算法研究  

Study on Mapping Algorithm of Intra Prediction Modes in DCT Domain for HEVC

作　　者：李俊娟[1] 刘昱[1] 

机构地区：[1]天津大学电子信息工程学院,天津300072

出　　处：《电视技术》2015年第3期64-67,共4页Video Engineering

基　　金：国家自然科学基金项目(61373102)

摘　　要：高效视频编码(HEVC)算法支持的帧内预测模式扩展到了35种,使之可实现更精准的预测,从而取得更高的压缩率。通过分析图像数据DCT系数的特性,研究了DCT系数与帧内预测模式的映射关系,提出了一种DCT系数的分布特征与帧内预测模式间的映射方法,该方法可用于提高HEVC的编码速度。In HEVC, the new international video coding standard, up to 35 intra prediction modes are supported, resulting in more accurate intra prediction and higher compression ratio. In this paper, by analyzing the feature of image data＇ s DCT coefficients, the mapping relationship between DCT coefficients and intra prediction modes is researched, and a mapping method between the distribution characteristics of DCT coefficients and intra prediction modes is proposed. This method can be used to speed up the en- coding process of HEVC.

关 键 词：DCT系数 HEVC 帧内预测 纹理方向 

分 类 号：TN919.5[电子电信—通信与信息系统]