去块滤波器是视频编码的重要部分,它能显著提高恢复视频的主观和客观质量。文中分析了解码图像中块效应产生的原因;归纳了去块滤波器的种类,创造性地将环路滤波器分为“加残差前滤波器”和“加残差后滤波器”两类,并分析了各类去块滤波器的工作原理;研究了现存的各种视频编码标准中去块滤波器的特点,并通过仿真实验分析了各去块滤波器的性能,为设计更加智能化、简单化的去块滤波器奠定基础。 Deblocking filters are an important part of video coding and can significantly improve the subjective and objective quality of recovered video. In this paper, we analyze the reason of the block effect in the decoded image, summarize the types of deblocking filter, and divide the loop filter creatively into two parts: “Add residual before filter” and “Add residual after filter” "And analyzes the working principle of various types of deblocking filters. The characteristics of the deblocking filters in various existing video coding standards are studied. The performance of each deblocking filter is analyzed through simulation experiments. More intelligent, simplistic deblocking filter to lay the foundation.