I am using an ADV7612 to receive HDMI/DVI signals an ADV7511 to transfer DVI signals. if video source is DVI signals(RGB 0-255) ,adv7612 always output RGB 16-235 format image,and it could not been changed by configuration.
I refer to the script ADV7612…
RANGE bit scales to make the data fit into 16-235 range. It means that no output value will be above 235 or less than 16.
So a x2 will be scaled to fit into 16-235.
Here's the results of my testing.
I'm using ADV7611 as the HDMI receiver in my system,When the source send a black video(RGB=0,0,0),But get (R=16,G=16,B=16) on P23~P0,and When the source send a black video(RGB=255,255,255),But get (R=235,G=235,B=235) on P23~P0,I set regiseter…
So you mean , if we input 235 , ADV739x can output 700mV either we use embedded or separate sync?
Is this written in the datasheet?
[PS] a 235 input will result in a full scale (700/714mV) output from the encoder.
If this is correct…
The range 16 - 235 is used when in BT.656 mode with embedded syncs. Embedded syncs use symbol markers > 235..
The range 1-254 can be used when in BT.601 which has separate syncs and no embedded syncs.
Here is what I was trying to do. I was trying to setup some SPORTS to do an external loop-back and thought I had an issue so I created a function to do the SRU initialization which would tie all unused inputs to LOW as suggested by the documentation…
Specifically, I'm curious where the 16/1792 factors come from when the gain is calculated - as described in the register spec for the AGC registers.
0-255 RGB range gets a gain of (255-0+1) * 16/1792
16-235 range gets a gain of (235-16+1) * 16…
Is the HDL project ad9680_eval/zc706 still being supported? I tried both the hdl_2014_r1 branch and the master branch and neither worked. From the log file, it looks like the port names on axi_9680_core changed at some point:
WARNING: [BD 5-235…
Visually when the OP-656_RANGE was set to 0, The light colors got brighter and the dark colors got darker as would be expected if the output range when from 16-235 to 0-255.
When your input is RGB then the output color space should be 0-255. If you…