Abstract
Packet switching of variable-bit-rate real-time video sources is a means for efficient sharing of communication resources while maintaining uniform picture quality. This paper extends our earlier work in modeling video sources which have been coded using interframe coding schemes and in carrying out buffer queueing analysis for the multiplexing of several such sources. Here, we consider models for scenes with multiple activity levels, which lead to sudden changes in the coder output bit rates. We obtain common buffer queue distributions and probabilities of packet loss. Our results demonstrate the efficiency of packet video on a single link.