Webcasts can adopt techniques developed by television to obtain higher quality. Television production techniques, however, cannot be integrated into webcast production without considering the fundamental di erences in the underlying infrastructure. We h a ve d e v eloped a general webcast production model composed of three stages (i.e., sources, broadcast, and transmission) to address these di erences. The Director's Console (dc) i s a l i v e w ebcast production application based on this model. It utilizes a distributed service architecture, which adapts to varying physical infrastructures and broadcast con gurations.
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