Analysis and modeling of optimal error protection for embedded codestreams

Document type: Journal Articles
Article type: Original article
Peer reviewed: Yes
Author(s): Mohammad Imran Iqbal, Hans-Jürgen Zepernick
Title: Analysis and modeling of optimal error protection for embedded codestreams
Journal: Journal of Electronic Imaging
Year: 2012
Volume: 21
Issue: 2
ISSN: 1017-9909
Publisher: SPIE
URI/DOI: http://dx.doi.org/10.1117/1.JEI.21.2.023022
ISI number: 000306436900041
Organization: Blekinge Institute of Technology
Department: School of Computing (Sektionen för datavetenskap och kommunikation)
School of Computing S-371 79 Karlskrona
+46 455 38 50 00
http://www.bth.se/com
Authors e-mail: mohammad.imran.iqbal@bth.se, hans-jurgen.zepernick@bth.se
Language: English
Abstract: Efficient utilization of bandwidth is key to providing mobile multimedia services such as wireless imaging. As such, efficient allocation of the available parity budget for error protection of the associated codestreams is essential for ensuring quality of service. Computing the optimal parity allocation to the codestream packets may not be possible in real-time due to the huge number of ways the parity can be assigned to the codestream packets. This is particularly true for systems having limited resources, such as mobile handheld devices. As a result, it is important to provide an error-protection scheme that gives good error-protection performance while imposing low computational and memory demands on the system. We therefore analyze how different parameters such as signal-to-noise ratio and source distortion-rate function affect the optimal unequal error protection (UEP) scheme for embedded codestreams. We also propose to approximate the optimal UEP using suitable mathematical models in order to reduce the complexity that otherwise would occur with computing the optimal UEP. We investigate several models for their fitness in approximating the optimal UEP using different performance metrics. The simulation results show that most of these models provide an excellent trade-off between performance and complexity.
Subject: Telecommunications\General
Telecommunications\Coding Theory
Keywords: Mathematical modeling, optimal error protection, wireless imaging, curve fitting, real-time unequal error protection
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