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Altera_Forum's avatar
Altera_Forum
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16 years ago

VIP Control is Mutilating my Image!!!

Hello All, I have an interesting problem. I've managed to put together a video processing path: cvi->scaler->frame buf->cvo Which works reasonably well scaling SXGA to SVGA for displa...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

Adding the control port to the scaler does more than just enable you to control the scaling ratio and set the go bit.

It also enables runtime control of the scaler, meaning that it enables the logic within the scaler that decodes the VIP control packets on the streaming interface and automatically determine the input video height and width. Without this, the scaler just always assumes the input resolution is what you declared in the megawizard. Have you looked at the video control packets coming out of the CVI and made sure they are correct? If the CVI is not correctly detecting your video input resolution, this would likely explain all of your issues.

P.S. Send me your design. We'll fix you up.

Jake