AVS视频标准中的熵编码部分是将语法元素与量化系数进行Exb-Golomb编码与存储的重要环节。为了进一步提高熵编码器的效率,本文采用了一种检测"哥伦布首位1"的FPGA实现算法,用(run,level)联合坐标寻址查找2D-VLC码表,并用FIFO...AVS视频标准中的熵编码部分是将语法元素与量化系数进行Exb-Golomb编码与存储的重要环节。为了进一步提高熵编码器的效率,本文采用了一种检测"哥伦布首位1"的FPGA实现算法,用(run,level)联合坐标寻址查找2D-VLC码表,并用FIFO进行暂存和输出码流的方法,降低了运算量以及硬件资源,提高了运行速度。该Exb-Golomb熵编码器已通过RTL(Register Transfer Level)级仿真和综合,占用硬件资源LUT6359门,相比其他同类设计的AVS熵编码器,大大减少了硬件资源的占用。展开更多
Audio Video coding Standard （AVS） is established by the AVS Working Group of China. The main goal of AVS part 7 is to provide high compression performance with relatively low complexity for mobility applications. Th...Audio Video coding Standard （AVS） is established by the AVS Working Group of China. The main goal of AVS part 7 is to provide high compression performance with relatively low complexity for mobility applications. There are 3 main low-complexity tools： deblocking filter, context-based adaptive 2D-VLC and direct intra prediction. These tools are presented and analyzed respectively. Finally, we compare the performance and the decoding speed of AVS part 7 and H.264 baseline profile. The analysis and results indicate that AVS part 7 achieves similar performance with lower cost.展开更多
文摘AVS视频标准中的熵编码部分是将语法元素与量化系数进行Exb-Golomb编码与存储的重要环节。为了进一步提高熵编码器的效率,本文采用了一种检测"哥伦布首位1"的FPGA实现算法,用(run,level)联合坐标寻址查找2D-VLC码表,并用FIFO进行暂存和输出码流的方法,降低了运算量以及硬件资源,提高了运行速度。该Exb-Golomb熵编码器已通过RTL(Register Transfer Level)级仿真和综合,占用硬件资源LUT6359门,相比其他同类设计的AVS熵编码器,大大减少了硬件资源的占用。
基金Supported by the National Natural Science Foundation of China under Grant Nos. 60333020 and 90207005.
文摘Audio Video coding Standard （AVS） is established by the AVS Working Group of China. The main goal of AVS part 7 is to provide high compression performance with relatively low complexity for mobility applications. There are 3 main low-complexity tools： deblocking filter, context-based adaptive 2D-VLC and direct intra prediction. These tools are presented and analyzed respectively. Finally, we compare the performance and the decoding speed of AVS part 7 and H.264 baseline profile. The analysis and results indicate that AVS part 7 achieves similar performance with lower cost.
