A concealment based approach to distributed video coding

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 k...

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Bibliographic Details
Main Authors: Anantrasirichai, Nantheera, Agrafiotis, Dimitris, Bull, Dave
Format: Conference Proceeding
Language:English
Subjects:
Concealment
Data compression
DVC
Video coding
Online Access:Request full text
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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.
ISSN:1522-4880
2381-8549
DOI:10.1109/ICIP.2008.4712234