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ADV212 - various target size cause varying delay

Question asked by Mem on Aug 3, 2015
Latest reply on Sep 9, 2015 by DaveD

Hi

 

I'm using an ADV212 in JDATA mode to compress PAL video and transfer it in a 8Mbps link.

Delay is the most important limitation in my design. I know ADV212 has 1.5 field delay and I buffer one field in transmitter(20 ms delay) an a frame in receiver(40 ms delay), therefor maximum delay should be  2*30+20+40=120 ms, but I'm experiencing 400ms delay which is not acceptable.

It gets worse when I decrease "Target Size". For a 4KB Field Packet Size, delay is three seconds!!

I have read from How to use ADV202 there is a 500KB internal Storage. Is there some sort of que in there that affects delay?

Is CODE FIFO threshold affects?

 

Regards

M. H.

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