Videostrem synchronisation

https://www.alteraforum.com/forum/attachment.php?attachmentid=6624

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Can you explain exactly what it is that you are trying to achieve?

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Hi gwall,

I try to explain:

The signal comes from my notebook.

I have a picture in which are 9 other pictures, like the picture I have uploaded. (I think I never wrote about four streams, they are 9 ;) )

It comes in over the Bitec HSMC Digital Audio/Video Adapter via DVI.

In Quartus II, I have the SOPC system with 9 clocked video inputs, every input becomes the picture as his input. The clippers, which comes next the CVIs, clipps each one part of the input picture, so that I have the 9 different pictures (yes, they are all different, just a little bit).

Then I scale them up and out of the SOPC system, I mix them together to achieve a 3D picture.

If all Clippers clipp just the picture at the left top, they are delayed just a few pixel. But if I clipp different parts of the picture, the output streams are delayed vertical.

What I mean with "delayed vertical" is, that I can see the vertical blankings (after the mixer) of 8 of the pictures, just the first is not delayed (because I use his h_sync and v_sync to mix all together).

Because of the mixing procedure, I need all nine h_syncs and v_syncs to be exactly the same.

Thank you!