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Altera_Forum
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15 years ago

Question about streaming video protocol

Hi all. Well, I know that CVI converts a generic input into an avalon st protocol compatibile data signal. Now, in my sistem i get a 27MHz pixel clock, while my video system is clocked @50MHz, a...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

hi Niki, thanks a lot for your reply.

Yes, out from the CVI i have color planes in sequence. Then I add a color plane sequencer so in order to get two planes in parallel.

I think I've understand.

in sequence, only for video pakets, I have ...YcYcYcYcYcYc... but this is the flow for all the (720*240) pixels of my field, only when also datavalid is asserted. so I could count all pixels @50MHz clock.

but what if they are transmit in parallel?

I think they should be like this

[15:8]YYYYYYYYYYYYY

[7:0]ccccccccccccccc

and they are transmitted only when datavalid is asserted(and i am in a video data paket sequence) .. they are still clocked @50MHz , isn't it?