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Optimized error protection of scalable image bitstreams

Hamzaoui, R. and Stankovic, Vladimir M. and Xiong, Z. (2005) Optimized error protection of scalable image bitstreams. IEEE Signal Processing Magazine, 22 (6). pp. 91-107. ISSN 1053-5888

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Abstract

This article focuses on FEC for scalable image coders. For various channel models, we survey recent progress made in system design and discuss efficient source-channel bit allocation techniques, with emphasis on unequal error protection. This article considered JSCC (joint source-channel coding) at the application layer only. Recent research has studied cross-layer optimization where JSCC is applied to both the application layer and the physical layer. The basic task here is to minimize the average distortion by allocating available power, subcarriers, and bandwidth among users at the physical layer and source-channel symbols at the application layer subject to a total resource constraint. Most of the JSCC systems covered in this article can be readily extended to transmit scalable compressed bit streams of video sequences and 3-D meshes. Due to the stringent delay constraints in video communications and the fact that MPEG is currently exploring a scalable video coding standard, fast JSCC algorithms are expected to play a bigger role and bring more performance gains. This article is also expected to stimulate further research efforts into JSCC and more importantly, prompt the industry to adopt some of these JSCC algorithms in their system designs, thus closing the cycle from algorithm development to implementation.

Item type: Article
ID code: 36506
Keywords: bandwidth allocation , video coding , multimedia communication , forward error correction, combined source-channel coding, coding errors , channel allocation , Electrical engineering. Electronics Nuclear engineering, Signal Processing, Applied Mathematics, Electrical and Electronic Engineering
Subjects: Technology > Electrical engineering. Electronics Nuclear engineering
Department: Faculty of Engineering > Electronic and Electrical Engineering
Related URLs:
    Depositing user: Pure Administrator
    Date Deposited: 20 Dec 2011 09:53
    Last modified: 04 Sep 2014 21:51
    URI: http://strathprints.strath.ac.uk/id/eprint/36506

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