Latency (preferably glass-to-glass) ADV7482

Hi,

This you need to evaluate based on your own system requirements and also need to consider the external factors like  connected sink/display's.

  Please note that, It also depends on the controller that we are using. If customer want the exact result then the customer can use the API's to measure the exact time (i.e In Software customer can add the api like GetCurrentMsCount(); between the appropriate locking registers to get the exact locking time).

 Also delay depends on what options are turned on in the video path.

Thanks,

Poornima

Hi,

Thanks for the reply. In fact, I have already estimations of the external factors. What I want to discard is that the ADV7482 introduces such a high latency HDMI to CSI that the other factors are negligible. An approximation of typical delay of this chipset for HD resolution would be helpful. What are the options that can affect the delay on the video path?

Hi,

Thanks for the reply. In fact, I have already estimations of the external factors. What I want to discard is that the ADV7482 introduces such a high latency HDMI to CSI that the other factors are negligible. An approximation of typical delay of this chipset for HD resolution would be helpful. What are the options that can affect the delay on the video path?

Hi,

As per expert comment "CP core has approximately 8 -12 clock cycles delay. This varies slightly depending if color space convertor etc. is used.

DVI input would add approximately 10 clock cycles to the CP core delay when using a DVI/HDMI input.

3D comb adds no delay to the video signal , the filtering is done on a old frame of video compare with the current frame.

2D comb adds 3Line delay for NTSC and 5 line delay for PAL inputs".

Please refer expert comment about ADV7842 latency atRE: ADV7842 Latency Questions [ADV8003 used as well] 

Thanks,

Poornima