A CONCEALMENT BASED APPROACH TO DISTRIBUTED VIDEO CODING

Author:

Anantrasirichai, Nantheera  Agrafiotis, Dimitris  Bull, Dave  

Journal:

2008 15TH IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING, VOLS 1-5

Issue Date:

2008

Abstract(summary):

This paper presents a concealment based approach to distributed video coding that uses hybrid Key/WZ frames via an FMO type interleaving of macroblocks. Our motivation stems from a previous work of ours that showed promising results relative to the more common approach of splitting the sequence in key and WZ frames. In this paper, we extend our previous scheme to the case of I-B-P frame structures and transform domain DVC. We additionally introduce a number of enhancements at the decoder including use of spatio-temporal concealment for generating the side information on a MB basis, mode selection for switching between the two concealment approaches and for deciding how the correlation noise is estimated, local (MB wise) correlation noise estimation and modified B frame quantisation. The results presented indicate considerable improvement (up to 30%) compared to corresponding frame extrapolation and frame interpolation schemes.

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2232---2235