Hi Dave ,
We are using ADV7441A in our design for VGA Input reception. The output display is not exact as source.Displayed text edges and all not smooth.Any registers setting i need to do to improve this text sharpness?
Thanks & Regards
Without knowing more information on you system it's hard to resolve. The first thing I'd look for is how are the component processor filters configured? are you using a color space converter? Do you have anti-aliasing filters turned on for the inputs, Do you see the same problem with HDMI inputs?
Edges are high frequency components in the video. Some filters can effect the edge rates
What's the schematic look like?
How are you initializing the part?
I have done the configuration of ADV7441a chip as per the script file available in your website. I have referred
##GR SXGA 1280x1024##
:RGB 1280x1024 @ 60 108.000MHz Out through DAC: configuration in script file ADV7441AADV7441A@_ADV7441AVDP_ADV7441AHDMI_ADV7341-VER.MB3.0.TXT. I have attached the script file with this mail. Please check and lety me know other than that i need to do any setting or not.
I have attached the ADV7441 chip connection and VGA Input connection part of schematic snapshot attached with this mail.
We are initialising Chip from FPGA through I2C interface. I have attached the complete system block diagram.
Please let me know for any clarification.
Sent: Wednesday, May 14, 2014 1:47 AM
To: Preeti Naik
Subject: New message: "ADV7441A register setting for Text Edge sharpness"
Re: ADV7441A register setting for Text Edge sharpness
created by GuenterL in Video - View the full discussion
The first thing I would try is remove the Pie filters from the analog signals on the VGA connector page.
We removed and checked the Pie filter at VGA Connector..still we are seeing the Blur display as before.So what next step we can try.
Sent: Wednesday, May 14, 2014 9:25 PM
As long as you are not doing any color space conversion, there are no mores filter in the RGB path.
1) How do you see the edge blurring if the data goes into an FPGA?
2) Can you reproduce the problem on our reference boards?
3) Can you capture a picture of the blurring and attach it here?
Actually we are capturing VGA Input data in FPGA and sending out at VGA output. We are generating image internally in FPGA and sent out through VGA out. That time display was proper. We could not see the blurness. When we pass VGA Input , we are seeing blurness at VGA out display. Thats how we concluded that problem with VGA Input.
We does not have reference board.
I have attached the captured pic, where down placed monitor is source and upper one is Display coming from board. Since we are seeing minor difference between those, its difficult to make out in captured image.
Sent: Thursday, May 15, 2014 6:56 PM
Hi GuenterL ,
Any update on this issue?
We've just re-pinged the ADV7441 expert a couple of days ago on this on this question.
Retrieving data ...