Iterative joint video and channel decoding in a trellis-based vector-quantized video codec and trellis-coded modulation aided wireless videophone

R. G. Maunder, J. Kliewer, S. X. Ng, J. Wang, L. L. Yang, L. Hanzo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

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 blockbased 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.

Original languageEnglish (US)
Title of host publicationVTC 2005-Fall
Subtitle of host publicationMid Way Through the Decade - Technology Past, Present and Future
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages922-926
Number of pages5
ISBN (Electronic)0780391527
DOIs
StatePublished - Jan 1 2005
Event62nd Vehicular Technology Conference, VTC 2005 - Dallas, United States
Duration: Sep 25 2005Sep 28 2005

Publication series

NameIEEE Vehicular Technology Conference
Volume2
ISSN (Print)1550-2252

Other

Other62nd Vehicular Technology Conference, VTC 2005
CountryUnited States
CityDallas
Period9/25/059/28/05

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

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