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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.
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