Network delay jitter often leads to the discontinuity of media playback.An improved dynamic playback algorithm is proposed in order to keep multimedia playing smoothly

which deals with the problem from the perspective of an end system.In the algorithm

playback rates of multimedia are variable according to the occupied buffer level with an intention of eliminating buffer underflow or overflow.The playback rates are chosen based on the requirement of the intra-media synchronization.To determine the thresholds of the occupied buffer level

a queuing model is established.Based on the analytic results

suitable thresholds can be determined according to the system parameters.Simulation results show the algorithm wins an advantage over Yuang's.