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Computers 2015, 4(2), 113-141; doi:10.3390/computers4020113

Error and Congestion Resilient Video Streaming over Broadband Wireless

1
School of Computer Science and Electronic Engineering, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, UK
2
Department of Electrical and Computer Engineering, University of Duhok, 1006 AJ Duhok, Iraq
*
Author to whom correspondence should be addressed.
Academic Editor: Aaron Quigley
Received: 13 January 2015 / Revised: 29 March 2015 / Accepted: 14 April 2015 / Published: 21 April 2015

Abstract

In this paper, error resilience is achieved by adaptive, application-layer rateless channel coding, which is used to protect H.264/Advanced Video Coding (AVC) codec data-partitioned videos. A packetization strategy is an effective tool to control error rates and, in the paper, source-coded data partitioning serves to allocate smaller packets to more important compressed video data. The scheme for doing this is applied to real-time streaming across a broadband wireless link. The advantages of rateless code rate adaptivity are then demonstrated in the paper. Because the data partitions of a video slice are each assigned to different network packets, in congestion-prone wireless networks the increased number of packets per slice and their size disparity may increase the packet loss rate from buffer overflows. As a form of congestion resilience, this paper recommends packet-size dependent scheduling as a relatively simple way of alleviating the buffer-overflow problem arising from data-partitioned packets. The paper also contributes an analysis of data partitioning and packet sizes as a prelude to considering scheduling regimes. The combination of adaptive channel coding and prioritized packetization for error resilience with packet-size dependent packet scheduling results in a robust streaming scheme specialized for broadband wireless and real-time streaming applications such as video conferencing, video telephony, and telemedicine. View Full-Text
Keywords: broadband wireless; access network congestion; data partitioning; multimedia networking; packet scheduling broadband wireless; access network congestion; data partitioning; multimedia networking; packet scheduling
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Al-Jobouri, L.; Ali, I.A.; Fleury, M.; Ghanbari, M. Error and Congestion Resilient Video Streaming over Broadband Wireless. Computers 2015, 4, 113-141.

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