Memory Copy Optimization for Streaming Gateway Transco ding：Mo dels and Algorithms

LI Mingzhe; WANG Jinlin; CHEN Xiao; YE Xiaozhou

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Memory Copy Optimization for Streaming Gateway Transco ding：Mo dels and Algorithms

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Repeated memory copy during proto-col translation inhibits capacity of a streaming media gateway. Unlike existing optimization techniques that rely on platform-specific features, this paper investigates algorithm-level platform-independent strategies. A math-ematical concept of the buf-string is proposed to model the protocol transcoding process. Based on this model three payload extraction algorithms that can reduce mem-ory copy are presented. The streaming gateway used in the Next-generation broadcasting (NGB) and the Next-generation on-demand (NGOD) system is taken as an ex-ample to demonstrate and evaluate our strategies. Experi-mental results from an x86 host and an embedded system prove that our strategies can reduce CPU overhead by 15%to 45%, and optimize the linear space complexity to a con-stant one.

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《电子学报（英文版）》 |2016年第4期|734-739|共6页
作者
LI Mingzhe; WANG Jinlin; CHEN Xiao; YE Xiaozhou;
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National Network New Media Engineering Research Center, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China;

National Network New Media Engineering Research Center, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China;

National Network New Media Engineering Research Center, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China;

National Network New Media Engineering Research Center, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China;

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Memory Copy Optimization for Streaming Gateway Transco ding：Mo dels and Algorithms

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