Research Article
Statistical Multiplexing of Transcoded IPTV Streams Based on Content Complexity
@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
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.
