Video transfers across IP and ATM networks have received much research attention during the last ten years. Various video services are expected in the future, enabled by the rapid development in video coding and broadband network technology. This paper gives an introduction to the issues involved in asynchronous video transfers. Brief overviews of video coding, rate control, multiplexing, as well as delay, error and loss control are given.
Outline

1. Background
2. Asynchronous transfer
3. Digital video
4. The video communication system
5. Perceptual requirements
6. The role of video
7. System trade-offs
8. Video coding
	Example: MPEG encoding
	Discussion
9. Rate control
	Modeling
	Bounding
10. Information transfer
	Deterministic multiplexing
	Statistical multiplexing without quality guarantees
	Statistical multiplexing with quality guarantees
	Discussion
11. Delay
	Delay control
12. Errors and loss
	Framing
	Loss concealment
	Layered (hierarchical) coding
13. ATM and Internet Protocols
	ATM adaptation layers
	Internet transport layer
14. Final remarks