Timing Recovery for Variable Bit-Rate Video on ATM Networks

We consider the problem of receiver timing recovery when video and associated audio are coded for transmission on variable bit-rate channels such as ATM networks, LANs, etc. We assume the video encoder satisfies conditions that ensure the video encoder and decoder buffers do not overflow when the receiver and transmitter are perfectly synchronized. We then describe several methods for controlling receiver phase locked loops under conditions of variable cell rate as well as jitter in the transmission delay of each cell.