Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

scaler usage in run time control

I am using vip suite 9.0 and quartus 9.0 for out new project. I am able to process frames with scaler in static parameters mode there is problem with runtime controle mode.I had following ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

Can I ask what you saw or read that made you assume the scaler would simply discard any data that existed beyond the length specified in the control packet? I would be surprised if that were the case. The control packet is simply to inform the scaler of how many pixels are in each line, and how many lines there are. Using this information it can determine things like:

- Which phase to use given a certain scaling ratio.

- When to begin reading in the next line vs. continuing to operate on a currently buffered line.

Maybe if you give the "endofpacket" signal with the 1024th pixel, the following extra pixels will be ignored. I guess I'm thinking if we lie to the scaler, we can't expect it to behave in any certain way.

Jake