We want to make in interface for our PAL ( 625 lines/50Hz/ interleave) cameras to connect HDMI monitors, which we use for our digital cameras.
In the first stage we use an ADV7184 for digitizing the PAL signal. The 4:2:2: output with embedded sync is forwarded to
the ADV7513 by a 16bit bus. when a monitor is connected to the output of the 7513 we get the videopicture.
But if a HDMI splitter or our HDMI-OSD box is connected, we have no output ( No Signal on screen).
The DDC channel is not connected!
Controlling the status registers thes have the following data:
0x3d 0x6c --> x2 rep. / VIC#44:576i-100,4:3
0x3e 0x00 -> VIC unavailable
0x3f 0xc0 -> 576i active
It seems there is no entry which maches the video signal.
Anybody have any suggestions what could be the reason?