Research Article
Congestion Resiliency of Data Partitioned H.264/AVC Video over Wireless Networks
@INPROCEEDINGS{10.1007/978-3-642-35155-6_1, author={Ismail Ali and Sandro Moiron and Martin Fleury and Mohammed Ghanbari}, title={Congestion Resiliency of Data Partitioned H.264/AVC Video over Wireless Networks}, 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={data-partitioning H.264/AVC IEEE 802.11e intra-refresh macroblocks}, doi={10.1007/978-3-642-35155-6_1} }- Ismail Ali
Sandro Moiron
Martin Fleury
Mohammed Ghanbari
Year: 2012
Congestion Resiliency of Data Partitioned H.264/AVC Video over Wireless Networks
MOBIMEDIA
Springer
DOI: 10.1007/978-3-642-35155-6_1
Abstract
Data partitioning is an error resiliency technique that enables unequal error protection for transmission of video over lossy channels. Including a per-frame cyclic intra-refresh macroblock (MB) line guards against temporal error propagation. This paper considers the impact of this form of error resilience on access control and proposes a scheme based on selective dropping of packets belonging to the data partition bearing intra-coded MBs. The paper shows that by this scheme, when congestion occurs, it is possible to gain up to 2 dB in video quality over assigning a stream to a single IEEE 802.11e access category. The scheme is shown to be consistently advantageous over other ways of assigning the partitioned data packets to different access categories. This counter-intuitive scheme for access control purposes reverses the priority usually given to partition B data packets over partition C data packets.