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Iterative Joint Video and Channel Decoding in a Trellis-Based Vector-Quantized Video Codec and Trellis-Coded Modulation Aided Wireless Videophone

Maunder, R. G., Kliewer, J., Ng, S. X., Wang, J., Yang, L-L. and Hanzo, L. (2005) Iterative Joint Video and Channel Decoding in a Trellis-Based Vector-Quantized Video Codec and Trellis-Coded Modulation Aided Wireless Videophone At IEEE VTC05 (Fall), United States. 25 - 28 Sep 2005. , pp. 922-926.

Record type: Conference or Workshop Item (Paper)

Abstract

We propose a Vector-Quantized (VQ) video codec that induces deliberately-introduced code constraints. The complete set of these code constraints are unambiguously described by a novel block-based modification of a symbol-based variable length coding trellis structure. This trellis is employed during VQ encoding to represent video information with a Minimum Mean Squared Error (MMSE) reconstruction. Additionally, the proposed trellis structure is employed in the video decoder to obtain a posteriori probability based MMSE estimates of the transmitted VQ tiles. Since the trellis structure unambiguously describes the code constraints induced by the video codec, its employment guarantees the automatic recovery of valid sets of VQ tiles. The proposed video codec is serially concatenated with a trellis-coded modulation scheme for transmission over a fast-fading Rayleigh fading channel. In the receiver, iterative-decoding convergence that eliminates all perceivable channel-induced video distortion is shown to be supported within 1.29 dB of the system's 2 bit/s/Hz channel-capacity limit of 3.96 dB.

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More information

Published date: 25 September 2005
Additional Information: Event Dates: 25-28 September 2005
Venue - Dates: IEEE VTC05 (Fall), United States, 2005-09-25 - 2005-09-28
Keywords: video, vector quantization, VQ, variable length coding, VLC, iterative decoding, EXIT chart, serial concatenation, joint source and channel coding, trellis, BCJR, Viterbi, MMSE, soft
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 261669
URI: http://eprints.soton.ac.uk/id/eprint/261669
PURE UUID: 29a07b98-8e5a-47fb-952e-cba1b0f15bb1
ORCID for R. G. Maunder: ORCID iD orcid.org/0000-0002-7944-2615
ORCID for L-L. Yang: ORCID iD orcid.org/0000-0002-2032-9327

Catalogue record

Date deposited: 15 Dec 2005
Last modified: 18 Jul 2017 09:00

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Contributors

Author: R. G. Maunder ORCID iD
Author: J. Kliewer
Author: S. X. Ng
Author: J. Wang
Author: L-L. Yang ORCID iD
Author: L. Hanzo

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