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Figure 4: DSM-CC message flows for download<strong>in</strong>g HTML content us<strong>in</strong>g download protocol.<br />

7. Conclusions and Future Work<br />

We see the future of ITV as not just limited to VOD but to a more general service for users to access a<br />

variety of <strong>in</strong><strong>format</strong>ion. In this context, DAVIC clearly specifies an architecture for ITV that can be<br />

effectively deployed and exist<strong>in</strong>g services be easily accessed.<br />

We are <strong>in</strong> the process of develop<strong>in</strong>g an MHEG-5 eng<strong>in</strong>e and simulat<strong>in</strong>g the MHEG-5 latency budgets for<br />

DAVIC ADSL networks.<br />

8. References<br />

[Buford 95] Buford, J., Gopal, C. Standardiz<strong>in</strong>g a Multimedia Interchange Format: A Comparison of<br />

OMFI and MHEG, Proc. International Conference on Multimedia Comput<strong>in</strong>g and Systems. May 1994,<br />

Boston, MA.<br />

[Columbia 96] Columbia University. Proc. Workshop on Video on Demand Systems: Technology,<br />

Interoperability, and Trials. June 24, 1996.<br />

[DAVIC 95] DAVIC, DAVIC 1.0 Specification Parts 1-12, Revision 5.0, Nov 16, 1995.<br />

[DSMCC 95] ISO/IEC, DSMCC: Digital Storage Media Command & Control, ISO/IEC 13818-6 DIS,<br />

July 1996.<br />

[Furht et al. 95] Furht, B., et al. "Design Issues for Interactive Television Systems", IEEE Computer, May<br />

1995, pp. 25-39.<br />

[Koegel 92] Koegel Buford J., On the Design of Multimedia Interchange Formats, Proc. Third<br />

<strong>in</strong>ternational Workshop on Network and Operat<strong>in</strong>g System Support for Audio and Video, Nov. 1992.<br />

[MHEG 95] ISO/IEC. MHEG: Base Object Encod<strong>in</strong>g. ISO/IEC 13522-5 DIS. December, 1995.<br />

Acknowledgments<br />

Cesar Teixeira is supported by CNPq/ProTeM-CC/SMmD, Project number 680077/94-4

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