多媒体应用中的比特流协处理器设计

2013 IEEE 11th International Conference on Dependable, Autonomic and Secure Computing Pub Date : 2013-12-21 DOI:10.1109/DASC.2013.66

Yingke Gao, Huan Ying, Zhiyuan Xue, Tiejun Zhang, Donghui Wang, C. Hou

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引用次数: 0

摘要

变长编码(VLC)广泛应用于各种视频编解码标准的熵编解码部分。由于其固有的位串行特性，其并行性难以得到发展。针对实时视频解码成为系统瓶颈的问题，本文提出了一种比特流协处理器，通过设计相应的比特流指令，大大加快了VLC的编解码速度。以SuperV DSP为研究原型，比特流协处理器的面积成本仅增加了1.71%，而熵解码应用的性能平均提高了73%左右。

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Design of Bitstream Co-processor for Multimedia Applications

Variable length coding (VLC) is widely used in the entropy codec part of various video codec standards. Its parallelism is difficult to be developed due to its inherent bit-serial characteristic. As it becomes the system bottleneck of real-time video decoding, this paper presents a bitstream co-processor which greatly accelerates the codec of VLC by designing corresponding bitstream instructions. With SuperV DSP as the research prototype, the area cost of the bitstream co-processor only increases by 1.71% while the performance of the application of entropy decoding is improved about 73% on average.

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2013 IEEE 11th International Conference on Dependable, Autonomic and Secure Computing

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