多标准视频编码器中基于多个4×4和8×8前向变换的快速算法的高效成本分担架构设计

Hao-Fan Hsu, Chia-Wei Chang, Chih-Peng Fan
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引用次数: 1

摘要

在这项工作中,基于硬件共享设计的快速算法多重变换被用于H.264/AVC、VC-1、HEVC和AVS标准中的4×4和8×8前向变换,以及MPEG-1/2/4方案中的8×8前向变换。4×4 VP8和AVS-M快进变换是由成本分担硬件开发的多标准视频编码应用。通过矩阵分解,我们提出的一维硬件共享变换架构仅由移位器和加法器实现。与没有硬件共享功能的直接组合快速算法相比,我们提出的架构分别减少了24.5%和73.4%的移位器和加法器的数量。与现有的多标准变换设计相比,我们提出的结构显示出更高的标准化硬件效率。我们提出的基于硬件共享的一维前向变换支持全高清(1920x 1080@60Hz)规范,工作频率为110.8MHz。
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High-efficiency and cost-sharing architecture design of fast algorithm based multiple 4×4 and 8×8 forward transforms for multi-standard video encoder
In this work, fast algorithm-based multiple transforms with a hardware-sharing design are exploited for 4×4 and 8×8 forward transforms in H.264/AVC, VC-1, HEVC, and AVS standards, and for 8×8 forward transforms in MPEG-1/2/4 schemes. The 4×4 VP8 and AVS-M fast forward transforms are developed by cost-sharing hardware for multi-standard video encoding applications. By matrix factorizations, our proposed 1D hardware-sharing transform architecture is realized by only shifters and adders. Compared with the directly combined fast algorithms without hardware-sharing functionality, our proposed architecture reduces the number of shifters and adders by 24.5% and 73.4%, respectively. Compared with existing multi-standard transform designs, our proposed architecture reveals larger normalized hardware efficiency. Our proposed hardware sharing based 1-D forward transform supports the Full HD (1920×1080@60Hz) specification with the 110.8MHz working frequency.
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