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Altera_Forum's avatar
Altera_Forum
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15 years ago

Alpha Blending Mixer without NIOS?

Hello, I've the following problem, I think about how to solve the best way: CVI -> downscale -> Place downscaled stream in one corner -> CVO The downscaled video stream should be display...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

I think the easiest option would be to use the Alpha Blending Mixer as you have suggested with a NIOS processor.

Is there a significant reason you don't want to use NIOS? The Nios II/e core is now free. If you trim down your BSP to a minimum, you can run all the code out of a few block rams.

Some other alternatives:

1. Create a custom component which is an Avalon Master which contains a state machine to configure the Alpha Blending Mixer.

2. Create your own custom VIP component to "place downscaled stream in one corner". This could be quite a bit more efficient than using the Alpha Blending Mixer if resources are tight. If you don't know how to create your own custom VIP component, the learning curve on this option could be a bit steep.