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Proceedings Paper

Macroblock selection algorithms for error resilient H.264 video wireless transmission using redundant slices
Author(s): Pierre Ferré; Dimitris Agrafiotis; David Bull
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Paper Abstract

In this paper, a redundant picture formation algorithm that takes into account a given redundancy rate constraint is presented for error resilient wireless video transmission without reliance on retransmissions. The algorithm assigns priorities to MBs according to two suggested metrics and ranks macroblocks accordingly. The first metric is based on an end-to-end distortion model and aims at maximising the reduction in distortion per redundancy bit. The end-to-end distortion accounts for the effects of error propagation, mismatch between the primary and redundancy description and error concealment. Macroblocks providing large distortion reduction for fewer bits spent are assigned a higher priority. The second metric employs the variance of the motion vectors of a macroblock and those of its neighbouring blocks. Results show that the rate distortion metric outperforms other examined metrics by up to 2dB. Moreover, gains over existing error resilience schemes, such as LA-RDO, are presented.

Paper Details

Date Published: 28 January 2008
PDF: 8 pages
Proc. SPIE 6822, Visual Communications and Image Processing 2008, 68220S (28 January 2008); doi: 10.1117/12.766470
Show Author Affiliations
Pierre Ferré, Univ. of Bristol (United Kingdom)
Dimitris Agrafiotis, Univ. of Bristol (United Kingdom)
David Bull, Univ. of Bristol (United Kingdom)

Published in SPIE Proceedings Vol. 6822:
Visual Communications and Image Processing 2008
William A. Pearlman; John W. Woods; Ligang Lu, Editor(s)

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