Talk:Extended Display Identification Data

The following text appeared on EDID before I merged the two articles:

The first version of EDID, 1.0, was produced in August 1994. Since then, versions 1.1, 1.2, 1.3 and 2.0 have appeared. An enhanced version EEDID (Extended Display Identification Data) appeared in July, 2001.

This does not agree with the article, which claims 3.0 appeared in 1997. AxelBoldt 10:48, 7 Jul 2004 (UTC)

in milimetres, then multiply by 10 ?

In item 21 where it says "Maximum Horizontal Image Size (in millimetre). Multiply by 10 for actual value." wouldn't it sound a little less silly to say "Maximum Horizontal Image Size (in centimetre)" ? The same goes for item 22.

I was going to say the same thing. Change made. -Ahruman 09:06, 31 March 2006 (UTC)[reply]

Addition Extensions

Is there some way to include later extensions to the EDID Standard such as Reference for 1.2 and 1.3

Furthermore I'd suggest to give the hex form of the given example along with its translation for developers to check if there implementations do right.

matching format to example

Seems quite confusing to match the format to the example given. Is "10-11: Product ID Code (little endian)" the "Monitor ID EPID775"? And how do you jump from a 2-byte "08-09: Manufacturer ID" to "Monitor Manufacturer: Company Name Envision, Inc."?— Preceding unsigned comment added by 64.186.168.130 (talk)

As explained here, Timing Descriptor 3 gives you 13 characters for manufacturer name. Not sure where the extra '.' came from at the end, that may have been the software... -- RevRagnarok ^{Talk Contrib Reverts} 14:00, 9 June 2006 (UTC)[reply]

1280x768? Is this a supported aspect ratio?

The article states, "Many Wide XGA panels do not advertise their native resolution, instead offering only a resolution of 1280×768." 1280x768 is a 5:3 aspect ratio. It appears from the EDID Data Format that the only supported aspect ratios are: 16:10, 4:3, 5:4, and 16:9. How do they "offer" 1280x768? PRBryson 15:45, 14 June 2007 (UTC)[reply]

This isn't right...

in "Limitations: "A major limitation of EDID is that it cannot express the native resolutions of the most common wide screen flat panel displays and liquid crystal display televisions. The number of horizontal pixels must be a multiple of 8. "

Not accurate at all. EDIDs go down to single pixels in their DTD fields.

"The number of vertical pixels is calculated from the horizontal resolution and the selected aspect ratio. To be fully expressible, the size of wide screen display must thus be a multiple of 16×9 pixels. For 1366×768 pixel Wide XGA panels the nearest resolution expressible in the EDID syntax is 1360×765 pixels. Specifying 1368 pixels as the screen width would yield an unnatural screen height of 769.5 pixels."

This is only true in the simple timing descriptor fields.

"Many Wide XGA panels do not advertise their native resolution, instead offering only a resolution of 1280×768. Some panels advertise a resolution only slightly smaller than the native, such as 1360×765. For these panels to be able to show a pixel perfect image, the EDID data must be ignored by the display driver. Special programs are available to override the EDID data; PowerStrip for Microsoft Windows and DisplayConfigX for Mac OS X"

No, they are overriding the graphics card driver limitations. The EDID data is often present in the aforementioned DTD field.

Converting a full set of chromaticities (xy for RGB+W) to a full set of triplets (Yxy/XYZ)

In EDID, the set of RGB-primaries along with white point is encoded with chromaticities only, i. e. 4 xy-pairs for red, green, blue and white. How can this chromaticity set be converted to XYZ- or Yxy-set?

I started a discussion in CIEXYZ talks page, please don't reply here. —Preceding unsigned comment added by 213.234.235.82 (talk) 11:32, 17 October 2007 (UTC)[reply]

GTF Toggle Value

Byte 64 :: Encoded value should either be 0x000A or 0x200. When reading byte 64, the value returned is 0xA00 (rather than 0x000A) - Is reading of byte 64 just a straightforward extraction of 2 bytes? —Preceding unsigned comment added by Stormshadow 79 (talk • contribs) 15:36, 24 September 2008 (UTC)[reply]