our input video is bt656(progressive).
The video output is a little left shift.
I dont know how to deal with the problem.
And I want a 480p video compliance with 861D.
Please help me.
Thanks a lot !
The inputs to the 7511 transmitter module are Hsync, Vsync, DE, clock and video data. The control signals Hsync, Vsync and DE must be regenerated from the AV codes. Since AV codes only contain H & V syncs infomration, DE is derived from H & V sync. Look at Figure 6 in the programming guide.
0x30/31 are used to generate Hsync and 0x35 is part of the DE generator.
Can the 7511 change the control signals so the output doesn't meet pure CEA861 standards? Yes. I have not 100% validated the script I sent you generates pure CEA861 timing but I have never run into a problem with sinks handling it. Sinks usually are somewhat tolerant slight variations from the pure 861 standard.
Basically if the you were sure the input was 100% CEA861 compliant you could connect the 7511 output to an analyzer and see if the measured timing absolutely meets the CEA861 specifications.
Please check that your input has the right timing and placement of the H and V sync pulses that the AV code indicate.
The script ":480p60 8-bit bus embedded syncs" in the attached file shows you how to configure the 7511 for 480p sources.
Thanks for your reply!
When I try to modify the Hsync Placement(0x30/31) or the Hsync Delay(0x35/36) register,I can get a right graphics.
But i dont if these registers would have a influence on a 861d video output?
And is there any difference between the Hsync Placement and the Hsync Delay?
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