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Altera_Forum
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14 years ago

Creating alpha channels for VIP

I was wondering how other VIP users were creating alpha channels for custom blocks that don't render into a frame buffer. I've recently discovered that the VIP Alpha Mixer treats the alpha and data c...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Hi eliljey,

I think the alpha stream should be generated along with the video stream to guarantee that they are matched in packet size. You may find this example design (on Thread ID 32696 - sorry I am not able to post a hyper links before I have 5 posts) useful, which has an Alpha Source block to provide constant value alpha stream for the input video stream, and also shows some ways of providing alpha stream for different kinds of source.

Hope this help,

rayh