A motion vector replenishment video codec for ATM networks

摘要

A low bit-rate video codec for ATM networks is described. It is based on two-layer coding principles. The base layer comprises the motion vectors plus a strip of interframe coded video data. The remaining video data are coded by a second layer. Transmission of the base layer cells is assumed to be guaranteed. The required guaranteed channel rate can be as low as that needed for a speech signal, such that networks like Orwell can handle them equally. The second layer cells may be lost, if congestion arises. Simulation results demonstrate the performance of the codec for a range of cell loss rates from the second layer.