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Related Experiment Videos

New architecture for MPEG video streaming system with backward playback support.

Chang-Hong Fu1, Yui-Lam Chan, Tak-Piu Ip

  • 1Centre for Multimedia Signal Processing, Department of Electronic and Information Engineering, Hong Kong Polytechnic University, Kowloon, Hong Kong. enchfu@polyu.edu.hk

IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society
|September 6, 2007
PubMed
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This study introduces an efficient MPEG video streaming algorithm for backward playback. The novel macroblock-based approach significantly reduces network bandwidth and decoder complexity, overcoming limitations of existing methods.

Area of Science:

  • Digital video processing
  • Video compression standards
  • Networked multimedia systems

Background:

  • MPEG video is widely used but backward playback is challenging due to predictive coding.
  • Existing backward playback methods require excessive decoder buffer or high network bandwidth and decoder complexity.
  • Efficient backward playback is crucial for enhanced user experience in video streaming.

Purpose of the Study:

  • To propose a macroblock-based algorithm for efficient MPEG video streaming with backward playback.
  • To minimize network bandwidth and decoder complexity requirements.
  • To enable backward playback in memory-constrained environments.

Main Methods:

  • Classifying macroblocks into backward macroblocks (BMBs) and forward/backward macroblocks (FBMBs).

Related Experiment Videos

  • Employing VLC-domain techniques for BMBs to reduce decoding and transmission.
  • Utilizing a mixed VLC/DCT-domain technique for FBMBs to lower decoder computational load.
  • Performing compressed-domain manipulation of macroblocks on the server.

    • Main Results:

    • The proposed algorithm significantly reduces required network bandwidth compared to conventional systems.
    • Decoder complexity is substantially decreased by the new streaming system.
    • The system effectively handles macroblocks in compressed domains (VLC and DCT).

    Conclusions:

    • The developed macroblock-based algorithm offers an efficient solution for MPEG backward playback.
    • The approach successfully minimizes network and decoder resource demands.
    • This method enhances the feasibility of backward playback in resource-limited streaming scenarios.