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Very-large-scale integration design of a low-power and cost-effective context-based adaptive variable length coding decoder for H.264/AVC portable applications

机译:适用于H.264 / AVC便携式应用的低功耗,经济高效的基于上下文的自适应可变长度编码解码器的超大规模集成设计

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摘要

Context-based adaptive variable length coding (CAVLC) is a new and efficient entropy coding tool in H.264/AVC (advanced video coding). This study proposes a low-power and cost-effective CAVLC decoding architecture for the H.264/ AVC baseline profile. Specifically, this study proposes an optimum two-layer power model for the variable length look-up table (VLUT) in the CAVLC decoder, and divides the decoding phase of the LUT into two-layer decoding to reduce power consumption. To achieve a cost-effective design, the proposed design merges common codewords to reduce the hardware cost among different LUTs in the second layer decoding. The proposed decoder is based on Taiwan Semiconductor Manufacturing Company (TSMC) 0.18 mm CMOS technology, and was completely verified on a field-programmable gate array (FPGA) emulation platform. The proposed design meets the demands of the real-time CAVLC decoding and reduces power consumption by 44??48% more than previous low-power CAVLD schemes. Finally, the proposed low-power and costeffective CAVLD design is suitable for H.264/AVC portable applications.
机译:基于上下文的自适应可变长度编码(CAVLC)是H.264 / AVC(高级视频编码)中一种新型且高效的熵编码工具。这项研究提出了一种针对H.264 / AVC基准配置文件的低功耗且经济高效的CAVLC解码架构。具体而言,本研究针对CAVLC解码器中的可变长度查找表(VLUT)提出了一个最佳的两层功率模型,并将LUT的解码阶段分为两层解码以降低功耗。为了实现具有成本效益的设计,提出的设计合并了通用码字,以减少第二层解码中不同LUT之间的硬件成本。拟议的解码器基于台湾半导体制造公司(TSMC)的0.18 mm CMOS技术,并在现场可编程门阵列(FPGA)仿真平台上进行了完全验证。所提出的设计满足了实时CAVLC解码的要求,并且与以前的低功耗CAVLD方案相比,功耗降低了44%至48%。最后,所提出的低功耗,高性价比的CAVLD设计适用于H.264 / AVC便携式应用。

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