Unequal Error Protection for ROI Coded Images over Fading Channels

Document type: Conference Papers
Peer reviewed: Yes
Author(s): Yeshan Yatawara, Manora Caldera, Tubagus Maulana Kusuma, Hans-Jürgen Zepernick
Title: Unequal Error Protection for ROI Coded Images over Fading Channels
Conference name: International Conference on Multimedia Communications Systems
Year: 2005
Pagination: 111-115
Publisher: IEEE
City: Montreal, Canada
Organization: Blekinge Institute of Technology
Department: School of Engineering - Dept. of Signal Processing (Sektionen för teknik – avd. för signalbehandling)
School of Engineering S- 372 25 Ronneby
+46 455 38 50 00
Authors e-mail: caldera@watri.org.au, mkusuma@staff.gunadarma.ac.id, hans-jurgen.zepernick@bth.se
Language: English
Abstract: Region of interest (ROI) coding is a feature supported
by the Joint Photographic Experts Group 2000
(JPEG2000) image compression standard and allows
particular regions of interest within an image to be compressed
at a higher quality than the rest of the image. In
this paper, unequal error protection (UEP) is proposed
for ROI coded JPEG2000 images as a technique for providing
increased resilience against the effects of transmission
errors over a wireless communications channel.
The hierarchical nature of an ROI coded JPEG2000
code-stream lends itself to the use of UEP whereby the
important bits of the code-stream are protected with a
strong code while the less important bits are protected
with a weaker code. Simulation results obtained using
symbol-by-symbol maximum a posteriori probability
(MAP) decoding demonstrate that the use of UEP offers
significant gains in terms of the peak signal to noise ratio
(PSNR) and the percentage of readable files. Moreover,
the use of ROI-based UEP leads to reduced computational
complexity at the receiver.
Subject: Telecommunications\General