My customer needs an HDMI Transmitter.
The input signal to the HDMI transmitter comes from a camera via their own ASIC which provides a digital data bus (16,24 bits) with sync and DE signals to the HDMI chip.
What best can be proposed for such design? (not consumer)
ADV7511 vs ADV7524A or other ?
I cannot find the full documentation package for the ADV7524A. Can you pls send the links?
Do we need an HDCP licence for those parts?
ADV7524A is an NDA part so we can't discuss or support it on EngineerZone. You'll need to go through ADI sales for that one.
It's required to be an HDCP adopter for receivers, we don't require it for transmitter parts as you can't decode anything with them.
One thing to realize with HDMI is that if the video format is not a CEA or VESA standard, even if it works with ADV7511, displays probably won't accept it.
Thanks for the fast answer.
Can you provide more details regarding the CEA or Vesa standards required for good operation in an HDMI display?
For CEA it's 861-F I think is the latest. The HDMI spec only requires support of 720x480 and I think the latest version might require 720p and 1080i. It's really up to the display manufacturer.
On VESA, the typical PC resolutions like XGA, UXGA, etc normally work but there is no requirement that they do.
Low frame rates like 720p/30Hz or 1080p/30hz often do not work at all. We've had customer in the past use ADV7511 to do some customer resolutions from camers-- not normally a consumer application and the ADV7511 worked but no display would show it. It's important to be aware of this and make sure that they can find a display that will support whatever resolution they want if it's not standard.
I've seen industrial/military customers put HDMI on a product thinking that means they can just plug in to any display, not realizing that their custom video formats work on few, if any, TVs.
Thank you very much Dave for those tips.
Will share with customers.