Grass Valley iTX System v.2.6 - Manual (Page 396)

HDSDI/SDI Preview from an iTX Desktop
HDSDI/SDI Preview from an iTX Desktop
An iTX Desktop workstation can output an HDSDI or SDI signal when playing back video clips. To
provide this functionality, it needs to be fitted with an AJA Corvid LP video card.
Connecting the output signal to a video monitor makes it possible for an operator to watch
broadcast-quality video images while playing back a video clip in the Media Viewer on the Asset
layout. The audio content may be de-embedded and passed to an audio monitoring unit for
playback.
The feature can be used in a QC checking of video and audio to give operators confidence in the
quality of media that is to be available to iTX playout channels.
The feature requires v1.4 of the iTX media processor, which is called the File Processing
Pipeline (or FPP for short). This delivers the video and audio streams to the Media Viewer and
the Corvid LP video card at the same time:
Video playout
Playout on the video monitor is synchronized with playout in the Media Viewer for all the usual
iTX Desktop playback controls:
• Play
• Pause
• Fast-forward
• Rewind
• Step forwards or backwards (frame by frame)
The video is displayed out at the aspect ratio defined in the media file; it is not scaled (which
means anamorphic clips may appear squashed). Preview of SD and HD media encoded at any of
the following display resolutions is supported: D1, 720p, 1080i.
Audio playout
iTX handles audio content slightly differently depending on whether or not the Corvid LP card is
in use: a Media Viewer option allows you to switch off the card output.
FPP
(v1.4)
Media
Viewer
Corvid
LP
Video and
audio
streams
HDSDI/
SDI
Video
Monitor
March 2015 System Administrator Guide Page 396 of 404