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Source of Content: Who will be supplying the content? Who owns the content? Are there any restrictions on use of the content? Can only certain users view the content? Will the content need to be protected against copying?

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Type of Content: What types of scenes are included in the content? How much detail is there? How much motion is present? Does the detail level of the content need to be preserved for the viewer?

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Content Technical Requirements: Does the content come from film, videotape, or a live camera? Is there a synchronized audio track? Is there more than one audio track (second language, commentary)? Is there any data that is included with the content, such as closed captioning, V-chip data, or program descriptions? Are there any limits mandated by the content owner on the amount or type of compression that can be used?

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System Funding: How will the content be paid for? How will the network usage be paid for? Will payments be required from each viewer? Will advertising be used?

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Viewer Profile: How many users will be viewing the content? Where will they be located? What equipment will they use to view the content?

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Network Capabilities: What bit rates will the network support? Will the network support multicasting? What security features does the network offer? Who owns the network?

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Performance Requirements: How...