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首页> 外文期刊>Image Processing, IET >Investigation of filtering of rain streaks affected video sequences under various quantisation parameter in HEVC encoder using an enhanced V-BM4D algorithm
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Investigation of filtering of rain streaks affected video sequences under various quantisation parameter in HEVC encoder using an enhanced V-BM4D algorithm

机译：使用改进的V-BM4D算法研究HEVC编码器中各种量化参数下雨条纹影响的视频序列的滤波

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摘要

This study proposes an enhanced video block matching four-dimensional (V-BM4D) denoising algorithm for highly correlated rain streaks pattern video sequence in high-efficiency video coding (HEVC) encoder. Removal of structural rain streaks from high definition (HD) video sequences are challenging issues in real-time video application. Temporal information of original video sequences is distorted among the successive video frames due to the presence of natural degradation parameters such as fog, smog and rain streaks. Rain streaks are highly correlated structural noise pattern, which affects the nature of video frame compared to other natural degradations. Existing HEVC encoder is employed with in-loop filtering to protect the temporal information of original video sequences from rain streaks pattern. However, in-loop filtering is unable to remove the highly directional oriented rain pattern from video frames. To retain temporal information among the successive video frames, enhanced block matching denoising block is adopted in HEVC coder. The proposed enhanced VBM4D- based in-loop filtering eliminates the various level of rain streaks from the HD video sequences by temporal information prediction in 4D platform. Experimental results demonstrate that the proposed denoising algorithm yields better peak signal to noise ratio value and provides better bit rate saving for various HEVC configuration.
机译：这项研究针对高效视频编码（HEVC）编码器中高度相关的雨纹模式视频序列，提出了一种增强的视频块匹配四维（V-BM4D）去噪算法。从高清（HD）视频序列中消除结构性雨水条纹是实时视频应用中的难题。由于存在自然退化参数（例如雾，烟雾和雨水条纹），原始视频序列的时间信息会在连续的视频帧中失真。雨纹是高度相关的结构噪声模式，与其他自然退化相比，它会影响视频帧的性质。现有的HEVC编码器与环路滤波配合使用，可保护原始视频序列的时间信息免受雨水条纹的影响。但是，环路滤波无法从视频帧中删除高度定向的降雨模式。为了在连续视频帧之间保留时间信息，HEVC编码器中采用了增强的块匹配降噪块。所提出的基于VBM4D的增强型环路滤波通过4D平台中的时间信息预测，消除了高清视频序列中的各种降雨条纹。实验结果表明，所提出的去噪算法产生了更好的峰值信噪比值，并为各种HEVC配置提供了更好的比特率节省。

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