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ADV7403 digital clamp timing time constant

Question asked by goksan on Apr 17, 2014
Latest reply on Apr 29, 2014 by DerekBurke



We are using ADV7403 for PAL input and we have a delay requirement for this decoding operation. However, in standard defition processor section,

ADV7403 user manual says "DCT[1:0] Digital Clamp Timing" time constant is 100 msec in fast mode[DCT:10] (page 132) which is a very high value for us. Is this time constant process  one-time operation at the beginning or do we have to wait 100 msec for every new frame /field? Moreover, when DCT[1:0] is determined by ADV7403 (DCT:11), can "100msec time constant" be improved significantly?


What is the total approximate delay between output and input (in case of using curent clamp also) for a PAL video in this decoder?


Thank you,