A Concealment Method for Shape Information in MPEG-4 Coded Video Sequences

TitleA Concealment Method for Shape Information in MPEG-4 Coded Video Sequences
Publication TypeJournal Article
Year of Publication2000
AuthorsShirani, S., B. Erol, and F. Kossentini
JournalIEEE Transactions on Multimedia
Volume2
Pagination185–190
ISSN1520-9210
Abstract

In this paper, we propose a new method for error concealment of shape information in MPEG-4 video bit streams that are transmitted over error prone channels. The proposed method employs a MAP estimator with an MRF as the image a priori model. The MRF is designed for binary shape information and its parameters are adapted based on the information of neighboring blocks. Our experimental results show that the proposed concealment method restores missing shape blocks with high accuracy. Compared to the median filtering method, our method restores 20% more missing shape data, with a much greater subjective improvement. The proposed algorithm requires relatively small number of integer multiplications and additions and simple logic operations, making it suitable for real-time implementations.

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