MultimediaServerMultimediaClientMultimediaServerATM NetworkMultimediaClientMultimediaMultimediaServerClientServerExecuting UnitControlAlgorithmNetworkΣS(t)Control/Logic UnitSamplerCongestionControlBandwidthAllocationAdmissionControlFeedbackTrafficShapingRateControlScalableTransmissionFlowControlServerShaperRATM NetworkToClientMultimediaSourceBufferRateControllerMultimediaServerServer BufferRMATMNetworkClientBufferMultimediaClientDiscardRateControllerPlaybackFastforwardFastbackwardStop/Pause3.6....... M3N9 GoP3.43.23+++ M3N15 GoPI frame size=300 KbitsP frame size=80 KbitsB frame size=25 KbitsRequired ACR rate in Mbps2.82.62.42.221.81.600.050.10.150.20.250.30.35Fastforward/fastbackward probability0.40.450.520....... M3N9 GoP19+++ M3N15 GoPPCR/MCR=2018I frame size=275 KbitsP frame size=75 Kbits17B frame size=20 KbitsExpected ACR (Mbps)16151413121100.20.40.60.811.2Level of network congestion1.41.61.820.35...... M3N9 GoP0.3+++ M3N15 GoPk=3I frame size=275 KbitsP frame size=75 KbitsB frame size=20 KbitsExpected startup delay (second)0.250.20.150.10.0500510152025Difference between PCR and MCR (Mbps)303540Client Buffer occupancy FeedbackMultimediaClientMultimediaServer ATM NetworkClient Buffer