A Unified Rate-Distortion Analysis Framework for Transform Coding

Zhihai He, Member, IEEE, and Sanjit K. Mitra, Life Fellow, IEEE


In our previous work, we have developed a rate-dis-tortion (R-D) modeling framework H.263 video coding by introducing the new concepts of characteristic rate curves and rate curve decomposition. In this paper, we further show it is a unified R-D analysis framework for all typical image/video transform coding systems, such as EZW, SPIHT and JPEG image coding; MPEG-2, H.263, and MPEG-4 video coding. Based on this framework, a unified R-D estimation and control algorithm is proposed for all typical transform coding systems. We have also provided a theoretical justification for the unique properties of the characteristic rate curves. A linear rate regulation scheme is designed to further improve the estimation accuracy and robust-ness, as well as to reduce the computational complexity of the R-D estimation algorithm. Our extensive experimental results show that with the proposed algorithm, we can accurately estimate the R-D functions and robustly control the output bit rate or picture quality of the image/video encoder.
[PDF] [BibTex]
Z. He, S.Mitra,
IEEE Transactions on Circuits and Systems for Video Technology, vol. 11, no. 12, pp. 1221-1236, Dec. 2001.
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