ON THE TREATMENT OF VIDEO CELL LOSS IN THE TRANSMISSION OF MOTION-JPEG AND JPEG IMAGES

Transmission of video information over computer networks poses many problems that must be solved. In most cases an absolute guarantee that video cells will not be lost under any circumstances cannot be given, and the video service must accept this possibility. This paper addresses the problem of reconstructing lost sections of an image without the need for retransmission of the missing data. This is important where no reference or previous frame information is available for substitution. Furthermore. concealment of the lost information is performed within the transform domain for a JPEG coded image. Identification of the most suitable components from the neighbouring DCT coded blocks to be used in the reconstruction process has enabled both an improvement in reconstructed image quality and a reduction in processing when compared with an earlier algorithm.