Traffic Monitoring of Variable Bit-Rate Video in ATM Networks

• Main Authors: Wen-Hsuan Shao, 邵文炫
• Other Authors: Wen-Thong Chang
• Format: Others
• Language: en_US
• Published: 1993
• Online Access: http://ndltd.ncl.edu.tw/handle/08236268976905663123

碩士 === 國立交通大學 === 電信研究所 === 81 === This thesis examines the problem of video transport over ATM networks using MPEG-based video compression coder. The constraints on the traffic of a MPEG-based codec in ATM environment are investigated and the interactions between the codec and the network are exploited. ATM networks, as proposed by CCITT as the solution for the future B-ISDN, will provide high flexibility of variable bit-rate (VBR) video service. And the policing function has been introduced to monitor some traffic characteristics of any connection in order to protect the networks. By integrating network source-policing into the VBR encoder, the available network bandwidth can be better utilized. According to a commonly proposed ATM network-user contract, the effect of encoder rate-control for the leaky bucket channel is examined. With the considerations of ATM cell loss, a 2-layered coding scheme is applied to keep picture quality high.