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# Turbo Detection of Space-time Trellis-Coded Constant Bit Rate Vector-Quantised Videophone System using Reversible Variable-Length Codes, Convolutional Codes and Turbo Codes

Yeap, B. L., Maunder, R. G., Ng, S. X. and Hanzo, L. (2004) Turbo Detection of Space-time Trellis-Coded Constant Bit Rate Vector-Quantised Videophone System using Reversible Variable-Length Codes, Convolutional Codes and Turbo Codes. At IEEE VTC'04 (Fall) (29/09/04) IEEE VTC'04 (Fall), United States. 26 - 29 Sep 2004. pp. 1358-1362.

Record type: Conference or Workshop Item (Paper)

## Abstract

In this treatise we characterise the achievable performance of a proprietary video transmission system, which employs a Constant Bit Rate (CBR) video codec that is concatenated with one of three error correction codecs, namely a Reversible Variable-Length Code (RVLC), a Convolutional Code (CC) or a convolutional-based Turbo Code (TC). In our investigations, the CBR video codec was invoked in conjunction with Space-Time Trellis Coding (STTC) designed for transmission over a dispersive Rayleigh fading channel. At the receiver, the channel equaliser, the STTC decoder and the RVLC, CC or TC decoder, as appropriate, employ the Max-Log Maximum A-Posteriori (MAP) algorithm and their operations are performed in an iterative 'turbo-detection' fashion. The systems were designed for maintaining similar error-free video reconstruction qualities, which were found to be subjectively pleasing at a Peak Signal to Noise Ratio (PSNR) of 30.6~dB, at a similar decoding complexity per decoding iteration. These design criteria were achieved by employing differing transmission rates, with the CC- and TC-based systems having a 22% higher bandwidth requirement. The results demonstrated that the TC-, RVLC- and CC-based systems achieve acceptable subjective reconstructed video quality associated with an average PSNR in excess of 30~dB for $E_b/N_0$ values above 4.6~dB, 6.4~dB and 7.7~dB, respectively. The design choice between the TC- and RVLC-based systems constitutes a trade-off between the increased error resilience of the TC-based scheme and the reduced bandwidth requirement of the RVLC-based scheme.

Text bly-rm-sxn-lh-vtc04Fall.pdf - Other

Published date: 26 September 2004
Additional Information: Event Dates: 26-29 September 2004
Venue - Dates: IEEE VTC'04 (Fall), United States, 2004-09-26 - 2004-09-29
Keywords: CBR, CC, TC, STTC, RVLC, equaliser, iterative detection
Organisations: Southampton Wireless Group

## Identifiers

Local EPrints ID: 261592
URI: https://eprints.soton.ac.uk/id/eprint/261592
PURE UUID: da0417bf-5064-49cd-a7d1-f081c54ec21e
ORCID for R. G. Maunder: orcid.org/0000-0002-7944-2615
ORCID for S. X. Ng: orcid.org/0000-0002-0930-7194
ORCID for L. Hanzo: orcid.org/0000-0002-2636-5214

## Catalogue record

Date deposited: 25 Nov 2005

## Contributors

Author: B. L. Yeap
Author: R. G. Maunder
Author: S. X. Ng
Author: L. Hanzo