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Altera_Forum
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16 years ago

VIP handling of Interlaced video

I am struggling with the processing of interlaced NTSC video using the VIP 9.0 cores, and hope someone here can give me some advice. My project needs to take two NTSC interlaced inputs from ADV...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

Yes 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