How to interpret HorizontalActivePixel in EDID Standard Timings

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M Taha Masood

Hello,
I had a question regarding VESA's EDID structure .

How to interpret HorizontalActivePixel and aspect ratio?

In other words if a standard timing is used and i have the Aspect
Ratio and HorizontalActivePixel , how can i calculate the maximum
resolution supported from these two infos?

thanks and regards
Taha
 
M Taha Masood said:
Hello,
I had a question regarding VESA's EDID structure .

How to interpret HorizontalActivePixel and aspect ratio?

In other words if a standard timing is used and i have the Aspect
Ratio and HorizontalActivePixel , how can i calculate the maximum
resolution supported from these two infos?

thanks and regards
Taha
Click to expand...

You can't - you need more information. Specifically you should buy a
copy of the VESA standard if you don't have one, and need to get to
that level of detail.
 
i already have a copy of EDID spec from VESA , when i use Phoenix's
EDID designer and EDID reader , for a 128 byte EDID 1.3 data set , it
interprets the standard timing and shows reoslution and refresh rate .
while for the same data , i can get the refresh data easily as it is
there , but am at a loss to understand how to come up with the
resolution from standard timing readings
what extra info , if any , is needed for that

thanks
Taha
 
M Taha Masood said:
i already have a copy of EDID spec from VESA , when i use Phoenix's
EDID designer and EDID reader , for a 128 byte EDID 1.3 data set , it
interprets the standard timing and shows reoslution and refresh rate .
while for the same data , i can get the refresh data easily as it is
there , but am at a loss to understand how to come up with the
resolution from standard timing readings
what extra info , if any , is needed for that

thanks
Taha
Click to expand...
OK - For the standard timings, you need to refer to the VESA Discrete
Monitor Timings
standard - standard and extended timings are "abbreviated" in the EDID and
are supposed
to be timings taken from the DMT standard (this is off the top of my
head...).
I seem to recall that the EDID standard does describe how to encode the
standard and
extended timings into those locations.
 
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