A 249-Mpixel/s HEVC Video-Decoder Chip for 4K Ultra-HD Applications
A 249-Mpixel/s HEVC Video-Decoder Chip for 4K Ultra-HD Applications
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DOI：
10.1109/jssc.2013.2284362
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发表时间：
2014
影响因子：
5.4
通讯作者：
M. Tikekar;Chao-Tsung Huang;C. Juvekar;V. Sze;A. Chandrakasan
中科院分区：
文献类型：
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作者：
M. Tikekar;Chao-Tsung Huang;C. Juvekar;V. Sze;A. Chandrakasan
High Efficiency Video Coding, the latest video standard, uses larger and variable-sized coding units and longer interpolation filters than H.264/AVC to better exploit redundancy in video signals. These algorithmic techniques enable a 50% decrease in bitrate at the cost of computational complexity, external memory bandwidth, and, for ASIC implementations, on-chip SRAM of the video codec. This paper describes architectural optimizations for an HEVC video decoder chip. The chip uses a two-stage subpipelining scheme to reduce on-chip SRAM by 56 kbytes-a 32% reduction. A high-throughput read-only cache combined with DRAM-latency-aware memory mapping reduces DRAM bandwidth by 67%. The chip is built for HEVC Working Draft 4 Low Complexity configuration and occupies 1.77 mm2 in 40-nm CMOS. It performs 4K Ultra HD 30-fps video decoding at 200 MHz while consuming 1.19 nJ/pixel of normalized system power.
