I'm trying to build a system that can overlay a camerasignal to a DVI signal from my PC . (using Altera VIP) Here ist my setup so far: ---------------------------------------------------------------------------- mixer
----------------(A : DVI-source 1080p60) CVI -> ALFABLENDMIXER(layer0) --->|......| ---------------------------------------------------------alpha0_source --->|......| ---------------------------------------------------------------------------|------| ---> CVO (1080p60 same pixclk as source A) (B:Camera 1080p60) CVI -> CSC -> FRAMEBUFFER -> ALFABLENDMIXER(layer1) --->|......| ---------------------------------------------------------alpha1_source --->|______| The output signal are not as expected: blinking.. flimmer.. blackscreen.. My first guess is that the problem is lack of framebuffer in the sourceA-path, but its not physical possible due to memory bandwidth!!! When im replacing sourceA with a TestPatternGenerator i got the intended overlay functionality :). It should be possible to run with a DVI input with some small adjustings but here im needing help!!!????? How do i setup the SourceA-path to run without framebuffer?? Using genlock or simpler solution? I hope someone can give me some hints to reach my goal. Thanks, Bertel
