Error concealment methods, a comparative study

TitleError concealment methods, a comparative study
Publication TypeConference Paper
Year of Publication1999
AuthorsShirani, S., F. Kossentini, and R. Ward
Conference NameElectrical and Computer Engineering, 1999 IEEE Canadian Conference on
Pagination835 -840 vol.2
Keywordsband-limited channels, compressed image data, compressed video data, data block loss, data compression, encoded bit stream, error concealment methods, ill-posed problem, image coding, image restoration, lost pixels restoration, transmission errors, video coding, visual communication

A serious problem that arises in transmission of compressed image and video data over band-limited channels is due to the fact that the encoded bit stream is vulnerable to transmission errors. This may cause the loss of blocks of data. Error concealment methods intend to conceal the effects of data block loss by restoring the lost information. Restoration of lost pixels in an image or video is known to be an ill-posed problem. Error concealment methods solve this problem by introducing assumptions. Different researchers have made different assumptions about the image and video signals. Depending on these assumptions or how they are interpreted, different concealment methods have been proposed. In this paper, we report on the different error concealment methods suggested in the literature and compare their a-priori assumptions, performances and complexities


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