Window-level rate control for smooth picture quality and smooth buffer occupancy

Long XU, Debin ZHAO, Xiangyang JI, Lei DENG, Sam KWONG, Wen GAO

Research output: Journal PublicationsJournal Article (refereed)peer-review

37 Citations (Scopus)


In rate control, smooth picture quality and smooth buffer occupancy are both important but contrary to each other at a given bit rate. How to get a good tradeoff between them was not devoted much attention previously. To deal with this problem, a theoretical window model is proposed in this paper, in which several adjacent frames grouped as a window are considered together. The smoothness of both picture quality and buffer occupancy can be gracefully achieved by regulating the size of the window. To illustrate the usage of window model, a window-level rate control algorithm cooperated with the traditional $\rho$-domain rate-distortion model is further introduced. In experiments, we first show how the proposed window model achieves the tradeoff between picture quality smoothness and buffer smoothness, and then demonstrate the significant PSNR improvement, accuracy of bit control and consistency of visual quality of the proposed window-level rate control algorithm. © 2011 IEEE.
Original languageEnglish
Pages (from-to)723-734
JournalIEEE Transactions on Image Processing
Issue number3
Publication statusPublished - Mar 2011
Externally publishedYes

Bibliographical note

This work was supported in part by the Major State Basic Research Development Program of China under 973 Program 2009CB320905, the National Science Foundation of China under Grant 60736043, and the Hong Kong RGC General Research Fund (GRF) 9041353 (CityU 115408).


  • Rate control
  • smooth buffer occupancy
  • smooth picture quality
  • video coding
  • window model
  • window-level rate control


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