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Error and Congestion Resilient Video Streaming over Broadband Wireless

Al-Jobouri, L and Ali, I and Fleury, M and Ghanbari, M (2015) 'Error and Congestion Resilient Video Streaming over Broadband Wireless.' Computers, 4 (2). 113 - 141. ISSN 2073-431X

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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.

Item Type: Article
Uncontrolled Keywords: broadband wireless; access network congestion; data partitioning; multimedia networking; packet scheduling
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Divisions: Faculty of Science and Health > Computer Science and Electronic Engineering, School of
Depositing User: Jim Jamieson
Date Deposited: 02 Mar 2017 12:07
Last Modified: 17 Aug 2017 17:18
URI: http://repository.essex.ac.uk/id/eprint/19195

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