Delivery of Mpeg Video Services over Atm

Variable bit rate VBR video is expected to be a major source of tra c for the Broadband Integrated Services Digital Network B ISDN While many methods for coding and compressing this video have been proposed it is likely that the MPEG standard will be commonly used In this paper we explore the e ect of the MPEG Group of Pictures GOP structure on the performance of a multiplexer carrying this video tra c from a number of independent sources We conclude that the alignment between the GOP structures of the di erent sources will have a major impact on network performance and lead to di culties concerning the Connection Admission Control CAC and the Usage Parameter Control UPC of MPEG video sources We also suggest means by which this e ect might be reduced