In this work, a novel methodology for the efficient multiplexing and streaming of MPEG4 video over wireless networks is presented and discussed. The proposed cross-layer adaptation jointly exploits variable-bitrate (VBR) multi-carrier code-division multiplexing (MC-CDM) and MPEG4 fine-grain-scalability (FGS) in order to provide unequal error protection to the transmitted video stream. A shared bandwidth is partitioned into orthogonal sub-channels in order to multiplex different layers of MPEG4-coded signals. Lower layers are assigned a higher number of sub-channels (and hence an increased frequency diversity) as compared to FGS enhancement layers, in order to provide a differentiated protection against channel degradations. Results achieved in terms of PSNR show that the VBR MC-CDM technique can provide better results than conventional MPEG4 single-layer multicarrier spread spectrum transmission.


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    Title :

    A cross-layer approach for efficient MPEG-4 video streaming using multicarrier spread-spectrum transmission and unequal error protection


    Contributors:
    Conci, N. (author) / Scorza, G.B. (author) / Sacchi, C. (author)


    Publication date :

    2005-01-01


    Size :

    147449 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English




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