Improving image and video transmission quality over ATM with foveal prioritization and priority dithering

Abstract

A fundamental drawback to increasingly popular ATMbased switching is the possibility of information loss with congestion. We demonstrate that with intelligent, fovea driven priority assignment of image data, we can reduce the negative impact of information loss over ATM networks. ATM standards allow a single bit to indicate high or low packet priority. To reduce the effect of this restriction we introduce the concept of priority dithering. Network multimedia multicast scenarios over heterogeneous link capacities where foveal prioritization would be of benej t are described. Network simulation results of this method are included which demonstrate the advantages of priority dithered foveal prioritization over traditional methods.

A Decade of Research for Image Compression In Multimedia Laboratory

“…The methods which simulate the biological system would perform better than the non-spatial methods. Wieb and Basu [8] assess the performance of the asynchronous transfer mode (ATM) using the variable resolution compression method. The asynchronous in ATM means ATM devices do not send and receive information at fixed speeds or using a timer, but instead negotiate transmission speeds based on hardware and information flow reliability.…”