一种多参考帧时域视频错误隐藏算法

Temporal Error Concealment Algorithm of Multiple Reference Frames

提出一种自适应扩大搜索范围的多参考帧错误隐藏算法。该算法以视频序列的运动剧烈程度为基础,在多个参考帧中根据视频序列运动的剧烈程度的不同自适应地扩大搜索范围以寻找最优匹配块,用最优匹配块替换受损块。实验结果表明,与多帧恢复的时域错误隐藏算法相比,错误隐藏算法无论是在PSNR值上还是主观视觉效果上都有所提高。

An error concealment algorithm based on adaptive expanding of searching range in multiple reference frames is proposed. The motion intensi~ ty of the video sequence is considered at first. According to the motion intensity, the search range is expended adaptively to find out the matched block in multiple reference frames. The experimental results show that the PSNR and subjective visual effect are improved by the proposed algorithm compared with multi - frame reconstructed temporal error concealment algorithms.