caa a22 4500 477132774 CHVBK 20180405111708.0 cr unu---uuuuu 170330e19971101xx s 000 0 eng 10.1007/s005300050066 doi (NATIONALLICENCE)springer-10.1007/s005300050066 Impact of video scheduling on bandwidth allocation for multiplexed MPEG streams [Elektronische Daten] [Marwan Krunz, Satish K. Tripathi] Abstract.: We present efficient schemes for scheduling the delivery of variable-bit-rate MPEG-compressed video with stringent quality-of-service (QoS) requirements. Video scheduling is being used to improve bandwidth allocation at a video server that uses statistical multiplexing to aggregate video streams prior to transporting them over a network. A video stream is modeled using a traffic envelope that provides a deterministic time-varying bound on the bit rate. Because of the periodicity in which frame types in an MPEG stream are typically generated, a simple traffic envelope can be constructed using only five parameters. Using the traffic-envelope model, we show that video sources can be statistically multiplexed with an effective bandwidth that is often less than the source peak rate. Bandwidth gain is achieved without sacrificing the stringency of the requested QoS. The effective bandwidth depends on the arrangement of the multiplexed streams, which is a measure of the lag between the GOP periods of various streams. For homogeneous streams, we give an optimal scheduling scheme for video sources at a video-on-demand server that results in the minimum effective bandwidth. For heterogeneous sources, a sub-optimal scheduling scheme is given, which achieves acceptable bandwidth gain. Numerical examples based on traces of MPEG-coded movies are used to demonstrate the effectiveness of our schemes. Springer-Verlag Berlin Heidelberg, 1997 Key words:Bandwidth allocation - MPEG - Statistical multiplexing - Video-on-demand nationallicence Krunz Marwan Department of Electrical and Computer Engineering, University of Arizona, Tucson, AZ 85721, USA e-mail: krunz@ece.arizona.edu, US aut Tripathi Satish K. Bourns College of Engineering, University of California, Riverside, CA 92521, USA e-mail: tripathi@engr.ucr.edu, US aut https://doi.org/10.1007/s005300050066 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s005300050066 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Krunz Marwan Department of Electrical and Computer Engineering, University of Arizona, Tucson, AZ 85721, USA e-mail: krunz@ece.arizona.edu, US aut NATIONALLICENCE 700 1- Tripathi Satish K. Bourns College of Engineering, University of California, Riverside, CA 92521, USA e-mail: tripathi@engr.ucr.edu, US aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer