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为满足AVS高清视频实时解码要求,提高环路滤波处理速度,提出了一种高效的AVS去块效应环路滤波的实用结构.将8×8块进一步分割为4×4块进行滤波运算.通过优化滤波顺序,将需要滤波的4×4块边界尽量集中,在读写数据的同时进行滤波操作,提高流水处理的效率和数据的利用率,从而有效地减少了滤波处理总的时钟数.实验结果显示,处理一个宏块只需要196个周期,相对于目前AVS环路滤波设计,速度提高50%.在100MHz工作频率下,能够支持AVS高清视频的实时解码滤波处理.
In order to meet the real-time decoding requirements of AVS high-definition video and improve the processing speed of loop filter, a practical structure of efficient AVS deblocking loop filtering is proposed. The 8 × 8 block is further divided into 4 × 4 blocks for filtering operation, Optimize the filter order, the 4 × 4 block boundaries to be filtered as much as possible, while reading and writing data at the same time filtering operation to improve the efficiency of water processing and data utilization, thus effectively reducing the filter to deal with the total number of clocks.Experiment The results show that only 196 cycles are required to process a macroblock, a 50% speed improvement over the current AVS loop filter design, enabling real-time decoding of AVS high-definition video at 100MHz.