An intelligent VOP discard algorithm (IVDA) for transmission of multi-layered MPEG-4 video over explicit rate networks

The transmission of MPEG-4 video over explicit rate networks provides an opportunity for complete interaction between the application and the network where the application can request the required bandwidth from the network and then adapts its rate based on the network offered rate. One method of rate adaptation is to encode video in multi layers, were the basic layer is always transmitted and the enhanced layer is only transmitted when enough resources are available. In this paper, we propose a novel intelligent VOP discard algorithm (IVDA) that controls the transmission of enhanced layer VOP The proposed algorithm depends on the knowledge of the current network state, the encoding sequence, nature of the various VOP types, and the buffer occupancy in order to control the transmission of the enhanced layer VOP The proposed algorithm was evaluated for various MPEG-4 test sequences with different traffic characteristics under various network conditions