Grass Valley Imagestore 750 v.3.0.1 - Manual (Page 34)

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Applications
Three Scenarios
Fig. 3-4: Downstream Branding Insertion
A benefit of downstream branding insertion is that the DVE and branding are performed by the
same device, which is much simpler to configure and automate. Also AFD data can be used for
graphics positioning. Dolby E and Dolby Digital (AC-3) can be passed through the Intuition XG,
but cannot be manipulated. The main disadvantage is that the graphics device is in the direct
signal path. In addition, this scenario is not supported by the master control option.
In-Stream Branding Insertion
This example feeds the video source to the Imagestore 750, which starts by performing A/B
mixing of video and of audio. Output from the A/B mixer is then routed into the Intuition XG,
which performs DVE squeezes and applies rich multi-layered graphics to the video signal. The fill
output of the Intuition XG then feeds one of the Imagestore 750’s keying layers to provide the
final program video output. Advanced audio mixing and processing (Dolby decode/encode, up-
mix, AD) is performed by the Imagestore 750 in parallel with video through the Intuition XG. The
Intuition XG can play out and mix audio clips with its output as embedded audio to be used by
the Imagestore 750 as a voice-over. Although simple processing of PCM background audio
could be performed by the Intuition XG, there are better monitoring possibilities if it is always
done by the Imagestore 750. Further, there will be no inconsistencies in audio output if the Intu-
ition XG is ever removed from the signal path.