新一代高效视频编码标准中帧内预测快速算法研究

Research on fast intra prediction algorithm for high efficient video coding

新一代视频压缩编码标准HEVC是目前国际上最先进的视频压缩标准,其压缩性能优于目前国际上的其它视频压缩标准。因此,目前国际上很多大厂商都在开发符合HEVC标准的产品。然而,HEVC标准所具有的很高的计算复杂度是其实用化的瓶颈。对于HEVC标准中的帧内预测部分,其计算复杂度高于其它视频压缩标准的帧内预测部分的2倍以上。为此,国际上提出了不少快速帧内预测算法。对这些算法进行了回顾、分析和仿真,并比较了各典型算法的性能和优缺点。在此基础上,对在某些具体实际应用环境下适宜选用哪个算法进行了分析。同时,对将来这方面的快速算法的发展方向进行了展望。

The HEVC video coding standard is the current most advanced video compression standard.Its compression performance is better than other current video compression standards.Most big companies in the world are developing the products based on this standard.However,the high computational complexity of this standard becomes the bottleneck of its implementation.Especially,the complexity of intra-frame prediction component is more than twice that of the other video compression standards.Thus,a lot of fast intra prediction algorithms have been proposed in the literature.The paper reviews,analyzes,and simulates these algorithms,compares their performances,and points out their pros and cons.Based on this,we also describe how to chose a suitable algorithm under different implementation scenarios.Finally,the future development directions of these fast algorithms are discussed.