Extrinsic information modification in the turbo decoder by exploiting source redundancies for HEVC video transmitted over a mobile channel

Perera, R., Arachchi, H. K., Imran, M. A. and Xiao, P. (2016) Extrinsic information modification in the turbo decoder by exploiting source redundancies for HEVC video transmitted over a mobile channel. IEEE Access, 4, pp. 7186-7198. (doi:10.1109/ACCESS.2016.2619259)

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Abstract

An iterative turbo decoder based cross layer error recovery scheme for compressed video is presented in this paper. The soft information exchanged between two convolutional decoders are reinforced both by channel coded parity and video compression syntactical information. An algorithm to identify the video frame boundaries in corrupted compressed sequences is formulated. The paper continues to propose algorithms to deduce the correct values for selected fields in the compressed stream. Modifying the turbo extrinsic information using these corrections act as reinforcements in the turbo decoding iterative process. The optimal number of turbo iterations suitable for the proposed system model is derived using EXIT charts. Simulation results reveal that a transmission power saving of 2.28% can be achieved using the proposed methodology. Contrary to typical joint cross layer decoding schemes, the additional resource requirement is minimal since the proposed decoding cycle does not involve the decompression function.

Item Type:Articles
Additional Information:This work was sponsored by the UK Engineering and Physical Sciences Research Council (EPSRC) under grant number EP/N020391/1.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Imran, Professor Muhammad
Authors: Perera, R., Arachchi, H. K., Imran, M. A., and Xiao, P.
College/School:College of Science and Engineering > School of Engineering
Journal Name:IEEE Access
Publisher:Institute of Electrical and Electronics Engineers
ISSN:2169-3536
ISSN (Online):2169-3536
Published Online:21 October 2016
Copyright Holders:Copyright © 2016 IEEE
First Published:First published in IEEE Access 4: 7186-7198
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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