A Framework for Error Protection of Region of Interest Coded Images and Videos

Document type: Journal Articles
Article type: Original article
Peer reviewed: Yes
Author(s): Muhammad Imran Iqbal, Hans-Jürgen Zepernick
Title: A Framework for Error Protection of Region of Interest Coded Images and Videos
Journal: Signal Processing: Image Communication
Year: 2011
Volume: 26
Issue: 4-5
Pagination: 236-249
ISSN: 0923-5965
Publisher: Elsevier
URI/DOI: doi:10.1016/j.image.2011.03.001
ISI number: 000291523300003
Organization: Blekinge Institute of Technology
Department: School of Engineering - Dept. of Electrical Engineering (Sektionen för ingenjörsvetenskap - Avd. för elektroteknik)
School of Engineering S-371 79 Karlskrona
+46 455 38 50 00
Authors e-mail: muhammad.imran.iqbal@bth.se, hans-jurgen.zepernick@bth.se
Language: English
Abstract: In this paper, we propose a framework for unequal error protection (UEP) of image and video streaming over a wireless channel. Our framework of allocating the parity symbols associated with error control coding to the image or video codestream takes advantage of the different levels of importance that particular spatial regions of visual multimedia content has to human observers. As such, it provides stronger protection against transmission impairments to those parts of an image or video stream that correspond to the regions of interest (ROIs) while weaker protection is applied to the background (BG). For this purpose, an image or video stream represented by a sequence of packets is split into smaller cells in such a way that certain cells contain the parts of a codestream that represent ROIs and the last cell carries solely BG information. The available parity budget obtained from the given code rate is then distributed among these cells based on their contribution to the overall perceptual quality of a reconstructed image or video. A dynamic programming approach is utilized to facilitate optimal allocation of parity to ROIs and BG for ROI based UEP. The performance of the proposed ROI based UEP scheme in terms of a objective perceptual quality metric is analyzed and compared with
both the optimal UEP without ROI processing and equal error protection (EEP) using the structural similarity (SSIM) index. Performance results validate the effectiveness of our framework and the superior performance of the proposed UEP scheme compared to EEP. The performance of the proposed UEP scheme matches well with that of the optimal UEP without ROI processing, especially, for multiple
spatial description image and video coding while computational complexity can be kept much lower.
Subject: Telecommunications\Coding Theory
Signal processing\Image and Video Processing
Keywords: Region of interest, UEP, SSIM index, dynamic programming, JPEG2000, Motion JPEG2000, objective perceptual quality.