The University of Southampton
University of Southampton Institutional Repository

EXIT-chart optimized block codes for wireless video telephony

EXIT-chart optimized block codes for wireless video telephony
EXIT-chart optimized block codes for wireless video telephony
In this paper we investigate a turbo detection scheme designed for robust video transmission over an uncorrelated Rayleigh fading channel. We first introduce a novel block error-correcting code, referred to as tin extrinsic information transfer (EXIT)-chart optimized block code (ECOBC), which benefits from soft decision decoding. The ECOBC exploits both the residual redundancy which manifests itself in terms of the non-uniform probability distribution of K-bit strings inherent in the video encoded bit-stream, as well as the intentional redundancy imposed by the ECOBC for mitigating the effects of transmission errors. As our first novel contribution, we address the design of ECOBCs by formulating the necessary and sufficient condition, which ensures that the EXIT function of the sof-tbit ECOBC decoder reaches the (1,I) point in the EXIT chart. Secondly, we propose a novel real-valued free-distance metric for characterizing the ECOBC's performance. Furthermore, the attainable performance and the computational complexity imposed by the ECOBC are investigated. The effects of the interleaver delay on the ECOBC's performance are also quantified. As an additional result, we demonstrate that at a fixed system bandwidth, the turbo detection scheme using the H.264 video codec with the error concealment tools disabled but amalgamated with the proposed ECOBC as well as an additional generalized low-density parity-check (GLDPC) code may lead to an approximately 2.5 dB signal-to-noise ratio gain in comparison to the benchmarker having the same total bit rate, which operated the H.264 scheme with the error concealment tools enabled hence resulting in a higher video rate and amalgamated with the same-rate GLDPC code, but dispensing with our novel ECOBC.
1671-1680
Pham, A.Q.
293a7112-4131-411a-a84c-967f2eb42c7c
Yang, L.L.
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Othman, N.S.
44000790-7766-4cbb-b43c-c87e0ec565cf
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
Pham, A.Q.
293a7112-4131-411a-a84c-967f2eb42c7c
Yang, L.L.
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Othman, N.S.
44000790-7766-4cbb-b43c-c87e0ec565cf
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1

Pham, A.Q., Yang, L.L., Othman, N.S. and Hanzo, L. (2008) EXIT-chart optimized block codes for wireless video telephony. IEEE Transactions on Circuits and Systems for Video Technology, 18 (12), 1671-1680. (doi:10.1109/TCSVT.2008.2004937).

Record type: Article

Abstract

In this paper we investigate a turbo detection scheme designed for robust video transmission over an uncorrelated Rayleigh fading channel. We first introduce a novel block error-correcting code, referred to as tin extrinsic information transfer (EXIT)-chart optimized block code (ECOBC), which benefits from soft decision decoding. The ECOBC exploits both the residual redundancy which manifests itself in terms of the non-uniform probability distribution of K-bit strings inherent in the video encoded bit-stream, as well as the intentional redundancy imposed by the ECOBC for mitigating the effects of transmission errors. As our first novel contribution, we address the design of ECOBCs by formulating the necessary and sufficient condition, which ensures that the EXIT function of the sof-tbit ECOBC decoder reaches the (1,I) point in the EXIT chart. Secondly, we propose a novel real-valued free-distance metric for characterizing the ECOBC's performance. Furthermore, the attainable performance and the computational complexity imposed by the ECOBC are investigated. The effects of the interleaver delay on the ECOBC's performance are also quantified. As an additional result, we demonstrate that at a fixed system bandwidth, the turbo detection scheme using the H.264 video codec with the error concealment tools disabled but amalgamated with the proposed ECOBC as well as an additional generalized low-density parity-check (GLDPC) code may lead to an approximately 2.5 dB signal-to-noise ratio gain in comparison to the benchmarker having the same total bit rate, which operated the H.264 scheme with the error concealment tools enabled hence resulting in a higher video rate and amalgamated with the same-rate GLDPC code, but dispensing with our novel ECOBC.

This record has no associated files available for download.

More information

Published date: 26 November 2008
Additional Information: Imported from ISI Web of Science
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 269679
URI: http://eprints.soton.ac.uk/id/eprint/269679
PURE UUID: 98acf55b-094d-475e-8e16-20981698877f
ORCID for L.L. Yang: ORCID iD orcid.org/0000-0002-2032-9327
ORCID for L. Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 21 Apr 2010 07:46
Last modified: 18 Mar 2024 02:49

Export record

Altmetrics

Contributors

Author: A.Q. Pham
Author: L.L. Yang ORCID iD
Author: N.S. Othman
Author: L. Hanzo ORCID iD

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×