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ADV7184 FB: FASTBLANK OVERLAY CONTROL

Question asked by emanuele.cardani on Sep 30, 2011
Latest reply on Sep 30, 2011 by DaveD
Branched to a new discussion

I would like to know how the FASTBLANK OVERLAY CONTROL works.

 

I need to perform an overlay over a video and I need to understand if this AD could fit my needs.

 

I've seen that with this component is possible to "mix" 2 different video: one coming from the composite video and one from the RBG input.

 

What is ot very clear to me are the different working modes. In particular the FAST BLANKING modes.

If I want to superimpose an overly (teletext like) which of 4 different modes is supposed to be right one?

 

If the Dynamic Switching (Fast Mux) is the right one, how does it work? I don' understand properly how does't it work. Am I supposed to toggle the FB pin for every pixel i need to set?

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