I was wondering if someone could help me answer a question of mine.
I want to make a HUD Overlay on some video and have found a vector graphics serial-VGA controller. I want to use this for my HUD overlay over top of some NTSC/PAL composite video. I was thinking if I got a NTSC/PAL->VGA converter, then I would have two VGA signals- my HUD and my video. I then want to use chroma keying to overlay them.
My question is this...I see 2:1 triple channel video multiplexers. Could I just make an RGB window comparison circuit for the HUD signal that would change it to the video signal whenever the chroma key matched? And switch it back whenever the chroma key does not? Are video switches fast and smooth enough to transition so frequently between horizontal and vertical lines of video this way to produce a seamless image?
EDIT: I just realized I would have to sync the two video sources. Aiya. But my question about switching the mux causing distortionns or tears in the video still stand.
I want to make a HUD Overlay on some video and have found a vector graphics serial-VGA controller. I want to use this for my HUD overlay over top of some NTSC/PAL composite video. I was thinking if I got a NTSC/PAL->VGA converter, then I would have two VGA signals- my HUD and my video. I then want to use chroma keying to overlay them.
My question is this...I see 2:1 triple channel video multiplexers. Could I just make an RGB window comparison circuit for the HUD signal that would change it to the video signal whenever the chroma key matched? And switch it back whenever the chroma key does not? Are video switches fast and smooth enough to transition so frequently between horizontal and vertical lines of video this way to produce a seamless image?
EDIT: I just realized I would have to sync the two video sources. Aiya. But my question about switching the mux causing distortionns or tears in the video still stand.