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Proceedings Article

Mobile video communications using a Wyner-Ziv transcoder

[+] Author Affiliations
Eduardo Peixoto, Ricardo L. de Queiroz

Univ. de Brasilia (Brazil)

Debargha Mukherjee

Hewlett-Packard Labs.

Proc. SPIE 6822, Visual Communications and Image Processing 2008, 68220R (January 28, 2008); doi:10.1117/12.765545
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From Conference Volume 6822

  • Visual Communications and Image Processing 2008
  • William A. Pearlman; John W. Woods; Ligang Lu
  • San Jose, CA | January 27, 2008

abstract

In mobile-to-mobile video communications, both the transmitting and receiving ends may not have the necessary computing power to perform complex video compression and decompression tasks. Traditional video codecs typically have highly complex encoders and less complex decoders. However, Wyner-Ziv (WZ) coding allows for a low complexity encoder at the price of a more complex decoder. We propose a video communication system where the transmitter uses a WZ (reversed complexity) coder, while the receiver uses a traditional decoder, hence minimizing complexity at both ends. For that to work we propose to insert a transcoder in the network to convert the video stream. We present an efficient transcoder from a simple WZ approach to H.263. Our approach saves a large amount of the computation by reusing the motion estimation performed at the WZ decoder stage, among other things. Results are presented to demonstrate the transcoder performance.

© (2008) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Eduardo Peixoto ; Ricardo L. de Queiroz and Debargha Mukherjee
"Mobile video communications using a Wyner-Ziv transcoder", Proc. SPIE 6822, Visual Communications and Image Processing 2008, 68220R (January 28, 2008); doi:10.1117/12.765545; http://dx.doi.org/10.1117/12.765545


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