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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2004, Vol. 5 Issue (5): 572-578    DOI: 10.1631/jzus.2004.0572
Computer & Information Science     
A complexity-scalable software-based MPEG-2 video encoder
CHEN Guo-bin, LU Xin-ning, WANG Xing-guo, LIU Ji-lin
Institute of Information & Communication Engineering, Zhejiang University, Hangzhou 310027, China; Division of Science & Technology, Department of Public Security, Zhejiang Province, Hangzhou 310027, China
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Abstract  With the development of general-purpose processors (GPP) and video signal processing algorithms, it is possible to implement a software-based real-time video encoder on GPP, and its low cost and easy upgrade attract developers\' interests to transfer video encoding from specialized hardware to more flexible software. In this paper, the encoding structure is set up first to support complexity scalability; then a lot of high performance algorithms are used on the key time-consuming modules in coding process; finally, at programming level, processor characteristics are considered to improve data access efficiency and processing parallelism. Other programming methods such as lookup table are adopted to reduce the computational complexity. Simulation results showed that these ideas could not only improve the global performance of video coding, but also provide great flexibility in complexity regulation.

Key words： Video coding      Complexity scalability      Motion estimation      SIMD     
Received: 16 April 2003     
CLC:  TN919.81  
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WANG Xing-guo
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CHEN Guo-bin, LU Xin-ning, WANG Xing-guo, LIU Ji-lin. A complexity-scalable software-based MPEG-2 video encoder. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2004, 5(5): 572-578.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2004.0572     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2004/V5/I5/572

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