Abstract
The use of multicast for distribution of real-time video over the Internet has received greater attention over the past few years. Unfortunately, a major challenge to its wide usage is the heterogeneity of networks and receivers. In this paper we proposed a mechanism called Hybrid Quality Adaptation (HQA) for multicasting layered MPEG-2 video. The receiver will subscribe to the number of layers based on their network and end-system resources. On the other hand, the video server adjusts the transmission characteristics of each layer to try and accommodate the requirements of the majority of the receivers. A prototype layered MPEG-2 multicast system, using HQA, has been successfully developed.
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