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IEICE Transactions on Information and Systems 2007 E90-D(5):872-876; doi:10.1093/ietisy/e90-d.5.872
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Copyright © 2007 The Institute of Electronics, Information and Communication Engineers

Regular Section -- Letters -- Image Processing and Video Processing

Frame-Level {rho}-Domain R-D Optimization in H.264

Yutao DONG1, Xiangzhong FANG1 and Jing YANG1

1 The authors are with the Institute of Image Communication and Information Processing, Shanghai Jiao Tong University, Shanghai, 200240, P.R.C. E-mail: ytdong{at}sjtu.edu.cn


  Abstract

The frame-level R-D optimization in H.264 is very important in video storage scenarios. Among all of the sub-optimal algorithms, a greedy iteration algorithm (GIA) can best lower the computational complexity of frame-level R-D optimization. In order to further lower the computational complexity, a {rho}-domain frame-level R-D optimization algorithm is proposed in this letter. Different from GIA, every frame's rate and distortion can be estimated accurately without actual encoding in our proposed algorithm. Simulation results show that our proposed algorithm can lower the computational complexity greatly with negligible variation in peak signal-to-noise ratio (PSNR) compared with GIA.

Key Words: {rho}-domain, R-D optimization, H.264, frame-level

Manuscript received September 21, 2006. Manuscript revised November 19, 2006.


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