Videostrem synchronisation

--- Quote Start ---

Hi,

Assuming I understood this correctly, the issue you are having is that the outputs from the CVOs are not synchronized.

The user guide has a few sections about generator lock and aligning the CVO output to an incoming start_of_frame signal. Is it something that can be used to fix your problem?

Edit: As gwall pointed out, you will also have to tie the output clock and the output SOF signal to the input clock and the input SOF signal.

--- Quote End ---

Hi,

i read at the ug_vip.pdf, that I need a VCXO to do GenLock (Clock Locking). But I think my Board (Altera Cyclone III Development Board) don't have a VCXO.

But do you think its possible to use Frame Locking instead of Clock Locking? I looked this training video from altera:

http://www.altera.com/customertraining/webex/implementing_video_systems/player.html

And it seems that I only have to tie the input and output SOF signal, like you and gwall said before, to use Frame Locking.

If I can do so, is it correct that this could do it in NiosII:

while (1)

{

cvo_1(sof) = cvi_1(sof);

cvo_2(sof) = cvi_1(sof);

cvo_3(sof) = cvi_1(sof);

...

}

Thank you!