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为了解决高分辨率及超高分辨率的视频数据量庞大的问题,国际视频编码标准化组织正制定更先进的视频压缩标准——高效视频编码标准(High Efficiency Video Coding,HEVC),即H.265。帧内编码作为视频编码的重要组成部分,其编码的复杂度和性能会严重影响整个视频的编码复杂度和压缩性能。为了降低HEVC中帧内编码的复杂度,文章提出了一种重新确定备选模式列表的方法,该方法根据备选模式列表中第一个模式的不同,快速自适应地确定备选模式列表中需要保留的模式,减少执行率失真优化的模式数目。实验结果表明,文章提出的算法在保证与标准测试平台HM8.0编码性能一致的条件下,帧内编码时间与原始HM8.0相比平均节省24.50%,有效地降低了帧内编码的复杂度。同时,所提出的算法能够与其它层次的快速编码方法相融合,以进一步减少复杂度。
In order to solve the problem of a huge amount of video data of high resolution and super high resolution, the International Committee of the Video Coding Standard is developing a more advanced video compression standard, High Efficiency Video Coding (HEVC), that is, H.265 . As an important part of video coding, the coding complexity and performance of intra coding seriously affect the coding complexity and compression performance of the whole video. In order to reduce the complexity of intra-frame coding in HEVC, the article proposes a method of re-determining the candidate mode list, which quickly and adaptively determines the candidate mode list according to the difference of the first mode in the candidate mode list The patterns that need to be preserved reduce the number of patterns optimized for distortion of execution rate. The experimental results show that the proposed algorithm saves 24.50% of the average intra-frame coding time compared with the original HM8.0 under the condition of ensuring the same coding performance as the standard test platform HM8.0, effectively reducing the complexity of the intra-coding . At the same time, the proposed algorithm can be combined with other fast coding methods to further reduce the complexity.