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Altera_Forum's avatar
Altera_Forum
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16 years ago

Video Clocked output and VGA

Hi all. I am using a DE2 , and I am trying to show RGB test pattern generator on the VGA. I am using vip to genereate the colour bars, but i have not benn able to fully understand the way VCO wo...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

Hi,

The easiest thing to do if you suspect that frame rate is the issue would be to configure the frame buffer (or deinterlacer) as a triple buffer to handle frame rate conversion and guarantee that you will not starve the CVO or overflow the CVI. You do not need to use the Nios (at least for that).

Depending on how you parameterized it, the deinterlacer may either double the rate (input field rate = output frame rate) or maintain it (input frame rate = output frame rate) or do the frame rate conversion if it is parameterized as a triple buffer.