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International Journal of Digital Multimedia Broadcasting
Volume 2009 (2009), Article ID 681078, 10 pages
http://dx.doi.org/10.1155/2009/681078
Research Article

Adaptive Error Resilience for Video Streaming

Department of Electrical and Computer Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University at Indianapolis, 723 West Michigan Street, SL160, Indianapolis, IN 46202, USA

Received 1 July 2008; Revised 29 January 2009; Accepted 24 March 2009

Academic Editor: Lorenzo Ciccarelli

Copyright © 2009 Lakshmi R. Siruvuri et al. 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.

Abstract

Compressed video sequences are vulnerable to channel errors, to the extent that minor errors and/or small losses can result in substantial degradation. Thus, protecting compressed data against channel errors is imperative. The use of channel coding schemes can be effective in reducing the impact of channel errors, although this requires that extra parity bits to be transmitted, thus utilizing more bandwidth. However, this can be ameliorated if the transmitter can tailor the parity data rate based on its knowledge regarding current channel conditions. This can be achieved via feedback from the receiver to the transmitter. This paper describes a channel emulation system comprised of a server/proxy/client combination that utilizes feedback from the client to adapt the number of Reed-Solomon parity symbols used to protect compressed video sequences against channel errors.