AD723,AD725,AD725 RGB inputs

Hi Dave,

My goal is to have this go onto a PCIE bus. I am currently using another part that has NTSC input and PCIE output and I was going to try and convert the XGA to NTSC so I could add it as another input. My end goal is to get the XGA to a PCIE bus but I did not find any IC combinations/solutions that would be able to make that conversion.

Does Analog Devices have any time of chipset solution that can do this kind of conversion without losing resolution?

Thanks,

Scott

Hi Scott,

Going from non-NTSC RGB to encoded/modulated NTSC requires scaling/interlacing.  If the format is correct, it's just a matter of color space conversion and modulation which is what those parts all do.

If the format isn't already correct, it's a much more complicated problem.  I'm assuming you are trying to encode 640x480 as NTSC?

Dave

Hi Scott,

Yah.. XGA to NTSC definitely would require scaling.  ADV7181C would certainly digitize XGA but it wouldn't encode it as NTSC in any case.  Your goal is that the output should go to a standard definition TV?

Dave

Hi Scott,

Ok.. the PCIE to NTSC was the part I was missing-- it's specifc to encoded analog NTSC or is it digital?  That seems like a strange part.  If the XGA is just digital data, wouldn't any arbitrary PCIE bridge part do the trick?  I imagine some buffering is all you'd need.

We don't have anything that we can discuss on the forum but a scaler part for what you want doesn't seem like the right solution anyway.

Dave