Mobile Multimedia Communications. 6th International ICST Conference, MOBIMEDIA 2010, Lisbon, Portugal, September 6-8, 2010. Revised Selected Papers

Research Article

Statistical Multiplexing of Transcoded IPTV Streams Based on Content Complexity

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  • @INPROCEEDINGS{10.1007/978-3-642-35155-6_6,
        author={Sandro Moiron and Rouzbeh Razavi and Martin Fleury and Mohammed Ghanbari},
        title={Statistical Multiplexing of Transcoded IPTV Streams Based on Content Complexity},
        proceedings={Mobile Multimedia Communications. 6th International ICST Conference, MOBIMEDIA 2010, Lisbon, Portugal, September 6-8, 2010. Revised Selected Papers},
        proceedings_a={MOBIMEDIA},
        year={2012},
        month={12},
        keywords={content complexity fuzzy logic control IPTV joint transcoding statistical multiplexing},
        doi={10.1007/978-3-642-35155-6_6}
    }
    
  • Sandro Moiron
    Rouzbeh Razavi
    Martin Fleury
    Mohammed Ghanbari
    Year: 2012
    Statistical Multiplexing of Transcoded IPTV Streams Based on Content Complexity
    MOBIMEDIA
    Springer
    DOI: 10.1007/978-3-642-35155-6_6
Sandro Moiron,*, Rouzbeh Razavi1,*, Martin Fleury1,*, Mohammed Ghanbari1,*
  • 1: University of Essex
*Contact email: smoiro@essex.ac.uk, rrazav@essex.ac.uk, fleum@essex.ac.uk, ghan@essex.ac.uk

Abstract

IPTV video services are under development for managed broadband networks, with ’last-mile’ delivery across wireless, ADSL or cable access networks. Delivering multiple video streams over a constrained channel often requires bitrate transcoders for bandwidth adaptation. This paper presents a bandwidth allocation scheme based on content complexity to equalize the overall video quality, in effect a form of statistical multiplexing. Complexity metrics serve to estimate the appropriate bandwidth share for each stream, prior to distribution over a wireless access network. These metrics are derived after entropy decoding of the input compressed bit-streams, without the delay resulting from a full decode. Fuzzy logic control serves to adjust the balance between spatial and temporal complexity metrics. The paper examines constant and varying bandwidth scenarios. Experimental results show a significant overall gain in video quality in comparison to a fixed bandwidth allocation.