Detecting and compressing dissolve regions in video sequences with a DVI multimedia image compression algorithm

A dissolve detector and dissolve handling mechanism are developed that exploits the parabolic behavior of the variances of the frames in a dissolve region to eliminate blockiness when the images in such a region are compressed with a motion compensation-based algorithm.

Abstract

It is common practice in video production to use a dissolve region to concatenate two scenes. When the images in such a region are compressed with a motion compensation-based algorithm such as the DVI PLV2.0, blockiness may occur whenever the prediction error images are not allocated the desired number of bits. These artifacts can be eliminated by first detecting, then handling the frames in a dissolve region in the proper way. A dissolve detector and dissolve handling mechanism are developed. The dissolve detector exploits the parabolic behavior of the variances of the frames in a dissolve region. The detected dissolve frames are subsampled vertically, then compressed.>