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Dc Application

This section describes the user interface of dc. The interface organization is shown in figure 5. The main window contains four panels: sources, preview, broadcast, and transmission. The sources panel displays sources in the studio session. The preview panel allows the director to preview and prepare sources before they are webcast. Streams in the webcast are displayed in the broadcast panel. The transmission panel, which is in development, will control webcast transmissions. An example is displayed in figure 6 where a screen dump of dc is shown.

**Figure:** Dc user interface organization.
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**Figure:** A screen dump of the Director's Console during a production.
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This section begins with a discussion of the sources panel. Second, the video window abstraction used in the preview and broadcast panels is described followed by a description of these two panels. Lastly, we discuss the integration of video-effects into dc.

Tai-Ping Yu
2000-03-17