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Video Coding with Adaptive Block Update

  • C. W. Kok
  • Tsuhan Chen
Chapter
  • 65 Downloads

Abstract

The encoding mode selection issue in a multimode block based video coder is addressed. An adaptive strategy is proposed which exploits interframe correlation to achieve low bit rate coding while maintaining the image quality. Interframe intensity matching is proposed to minimize ‘Intensity Blocking’ in selecting the encoding mode. Further bit rate reduction is achieved by nonuniform weight assignment in different encoding modes. The proposed strategy has been integrated with the ITU-T H.263 video coding standard. Promising results in reducing the bit rate and blocking artifacts are obtained when compared with the test model (TMN 6) of H.263.

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References

  1. 1.
    ITU-T Recommendation H.261, “Video Codec for Audiovisual Services at P*64 kbits/s”, Aug. 1990.Google Scholar
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    Draft ITU-T Recommendation H.263, “Video Coding for Low Bitrate Communication,” July 1995.Google Scholar
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    ISO/IEC MPEG, “Information Technology - Coding of moving pictures and associated audio - For digital storage media up to about 1.5Mbits/s - CD 11172,” Dec. 1991.Google Scholar
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    MPEG2, Generic coding of moving pictures and associated audio, ISO/IEC 13818–2 (video), Recommendation H.262, Committee Draft Nov. 1993.Google Scholar
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    T.Wiegand, M.Lightstone, D.Mukherjee, T.G. Campbell and S.K.Mitra, “Rate-distortion optimized mode selection for very low bit rate video coding and the emerging H.263 standard,” IEEE Trans. CAS-VT, pp. 182–290, April 1996.Google Scholar
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    W.B.Pennebaker and J.L.Mitchell, JPEG: Still image data compression standard,Van Nostrand Reinhold, 1993.Google Scholar

Copyright information

© Springer Science+Business Media New York 1997

Authors and Affiliations

  • C. W. Kok
    • 1
  • Tsuhan Chen
    • 2
  1. 1.ECE Dept.University of Wisconsin MadisonMadisonUSA
  2. 2.AT&T Labs — ResearchHolmdelUSA

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