Grass Valley Vertigo XG Integration v.2.6 - Manual (Page 7)

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Vertigo XG & iTX Integration
User Manual
Processing and playout of video and graphics
Using the Vertigo XG plugin in the iTX Desktop, the graphics page and scenes can then be
added to the channel’s schedule or timeline as a secondary event.
TX Play controls schedule playout by sending commands through the Output Server to the
iTX Player to play out events at specified times. An event can feature one or two video
sources, from which iTX produces an SDI or HD SDI output signal.
When an event includes a Vertigo page or scene, the iTX Player feeds the video streams to
the XG Renderer. It always supplies two streams; if there is only one video source, one of the
streams has blank frames.
Using the Oxtel protocol, TX Play instructs Vertigo Xplay to cue and take the page or scene.
Xplay processes the page/scene requirements and sends playout commands to the
XG Renderer.
The XG Renderer loads the page or scene and its associated graphics. The XG Renderer and
the GPU renders the graphics with the video streams and passes a single rendered video
stream back to the iTX Player, which combines this with the audio stream(s) for playout
through the AJA video card.
The iTX Player does not pass any audio content to the XG Renderer. It disembeds the audio
content from the video streams, diverts it around the XG Renderer and then re-embeds it
into the rendered video stream (after a delay to compensate for the render process).
For events that do not feature a Vertigo page or scene (XG Event), the video streams simply
pass through the XG Renderer (see Figure 1-2).
Fig. 1-2: For all other event types, the video streams pass through the XG Renderer
Limitations of the XG Inside
The following limitations currently apply to the integration of the Vertigo XG components
in the iTX Output Server.
• The system can handle one or two video streams from any of the following source
options: one video clip; two video clips; a live feed; a video clip and a live feed.