It is widely known that network bandwidth is easily monopolized by distributed multimedia applications due to their greedy UDP traffic. This paper proposes TCP-friendly MPEG-4 video transfer methods which enable realtime video applications to fairly share the bandwidth with conventional TCP data applications. It considers how video applications should regulate video quality to adjust video rate to the desired sending rate which is determined by TCP-friendly rate control algorithm. Carelessly applying TCP-friendly rate variation to the video application would seriously degrade the application-level QoS. For example, the control interval should be long enough to avoid the fluctuation of video quality caused by too frequent rate control.
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