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Altera_Forum
Honored Contributor
16 years agoYes you are correct in assuming that every field would be processed as if it were a frame. However, I've never run interlaced data through the mixer and don't know the behavior.
I believe Altera has a simple interlacer block which I think is due to be released with 9.1. However, if you ping the right guys maybe they can give you a pre-release version. I've written my own simple interlacer but all it does is drop every other line. I'm sure you could write something similar. If you do so, you'll have to process everything in progressive format and interlace at the end. I haven't had the need to write a true interlacer (with the frame buffer) yet but I will shortly. Since you are using a JTAG master, I'd double-check to make sure those registers are getting set right. If it were me I'd throw in a NIOS really quick and some on-chip memory. Jake