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LS-EXT™ Standard
VESA
Video Electronics Stan=
dards
Association
860 Hillview
Court, Suite 150 &nb=
sp; =
&nb=
sp; =
&nb=
sp; Phon=
e:
(408) 957-9270
VESA ENHANCED EDID LOCALIZED STRING
EXTENSION STANDARD
Release A
July 10, 2003
Purpose
This
standard defines an extension to the Enhanced EDID (E-EDID) data format use=
d to
provide specific types of string information.
S=
ummary
This
document describes a 128-byte data structure, provided as an optional exten=
sion
to the base Enhanced EDID data structure. This structure provides data in t=
he
form of character strings used to describe the monitor. These strings are used to suppleme=
nt or
replace similar strings in the base EDID by providing more complete string
descriptions and/or string descriptions using different languages or
localizations.
Preface<=
/span>
Intellectual Property<=
/span>
Copyright © 1994 - 2003 Video Electronics Standards Associatio=
n. All rights reserved.
While
every precaution has been taken in the preparation of this standard, the Vi=
deo
Electronics Standards Association and its contributors assume no responsibi=
lity
for errors or omissions, and make no warranties, expressed or implied, of
functionality or suitability for any purpose.
Trademarks<=
span
style=3D'font-size:14.0pt;mso-bidi-font-size:10.0pt'>
All
trademarks used within this document are the property of their respective
owners. VESA, DDC, DPMS, EDID, EVC, P&D and VDIF are trademarks of the
Video Electronics Standard Association.
I2C
is a trademark owned by Philips.
Patents
VESA
proposals and standards are adopted by the Video Electronics Standards
Association without regard as to whether their adoption may involve any pat=
ents
or articles, materials, or processes. Such adoption does not assume any
liability to any patent owner, nor does it assume any obligation whatsoever=
to
parties adopting the proposals or standards documents.
Support for this Stand=
ard
Clarifications
and application notes to support this standard may be written. To obtain the
latest standard and any support documentation, contact VESA.
If
you have a product, which incorporates EDID, you should ask the company that
manufactured your product for assistance. If you are a manufacturer, VESA c=
an
assist you with any clarification you may require. All comments or reported
errors should be submitted in writing to VESA using one of the following
methods.
·
Fax &n=
bsp; : &=
nbsp; 408-957
9277, direct this note to Technical
Support at VESA
·
e-mail: &nbs=
p; support@vesa.org
·
Mail: =
Technical
Support
&=
nbsp; &nbs=
p; Video
Electronics Standards Association
&nbs=
p; &=
nbsp; 860
Hillview Court, Suite 150
&nbs=
p; &=
nbsp;
&nbs=
p; &=
nbsp;
Initial release of the standard.
Acknowledgments=
This document would not have b= een possible without the efforts of the VESA Display Committee. In particular, = the following individuals and their companies contributed significant time and knowledge to this edition, and/or previous editions of the EDID document.= p>
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Bryan Young |
Microsoft |
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Jack Hosek |
NEC-Mitsubishi Electronics Display |
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Alain d’Hautecourt |
ViewSonic |
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Syed Atha= r Hussain |
ATI Technologies Inc. |
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George Wiley |
Qualcomm |
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Table of Contents
1.1.1<=
span
style=3D'font:7.0pt "Times New Roman"'> Revision History...............=
...........................................................................=
........................................................... <=
!--[if supportFields]> =
PAGEREF
_Toc31096661 \h <=
![endif]-->3
1.1.2<=
span
style=3D'font:7.0pt "Times New Roman"'> 1...........................................=
...........................................................................=
....... OVERVIEW &n=
bsp;  =
; 5
1.1.3
1.1...........=
...........................................................................=
...................................... Summary &=
nbsp; 5
1.1.4
1.2...........=
...........................................................................=
................................ Background &=
nbsp; 5
1.1.5
1.3...........=
...........................................................................=
................. Standard Objectives &=
nbsp; 5
1.1.6
1.4...........=
...........................................................................=
............... Reference Documents &=
nbsp; 5
1.1.7<=
span
style=3D'font:7.0pt "Times New Roman"'> 2...........................................=
.......................................................................... =
DATA FORMATS&nbs=
p; &=
nbsp; 6
1.1.8
2.1.1...............................=
........................................................ Enhanced EDID High Level Layout =
6
1.1.9<=
span
style=3D'font:7.0pt "Times New Roman"'> 3...........................................=
................................................ Localized String Extension =
9
1.1.10
3.1...........=
...........................................................................=
................ Extension Overview &nb=
sp; Error! Bookmark not defined.
1.1.11
3.2...........=
...........................................................................=
.............................. Extension ID &=
nbsp; 9
1.1.12
3.3...........=
...........................................................................=
..... Extension Version/Revis=
on &=
nbsp; 9
1.1.13
3.4...........=
Unicode Version
informationEDID Structure Version / Revision: 2 bytes =
9
1.1.14
3.5...........=
...........................................................................=
.......................... String Table(s) &=
nbsp; 10
1.1.15
3.5.1...............................=
...........................................................................=
... String Table Size &n=
bsp; 10
1.1.16
3.5.2...............................=
.......................................................................... =
String Table Header =
10
1.1.17
3.5.3...............................=
...................................................................... Language ID Structure &nbs=
p; 11
1.1.18
3.5.4...............................=
................................................................... =
Manufacturer Name Data &nb=
sp; 12
1.1.19
3.5.5...............................=
...........................................................................=
.. Model Name Data&=
nbsp; &nbs=
p; 12
1.1.20
3.5.6...............................=
.......................................................................... =
Serial Number Data &=
nbsp; 12
1.1.21
3.6...........=
...........................................................................=
....... Additional string table=
s &=
nbsp; 13
1.1.22
3.7...........=
...........................................................................=
............................. Unused bytes &=
nbsp; 14
1.1.23
3.8...........=
...........................................................................=
.................................. Checksum &=
nbsp; 15
1.1.24=
4...........................................=
..................................................................... String Priority&=
nbsp; &nbs=
p; 16
1.1.25=
5.......................................... =
APPENDIX A - Sample Localized string extension d=
ata &=
nbsp; 17
1.1.26=
6...........................................=
.. APPENDIX B
- Answers To Commonly Asked Questions &n=
bsp; 20
1.1.27=
7...........................................=
........................ APPENDIX C – Spec Compliance Checklist &=
nbsp; 21
1.1.28
7.1...........=
....................................................... All reserved bits in all
fields are zero. &nb=
sp; 21
1.1.29
7.2..... ISO 639-2 ASCII-3 code
fields, if not used, contain the value 000000000000000b. =
21
1.1.30
7.3...........=
....... If a country code is not
used, the country code field must be zero.&=
nbsp; &nbs=
p; 21
1.1.31
7.4...........=
.................... There are no SPACE char=
acters
used in an ASCII-3 code field. &=
nbsp; &nbs=
p; 21
1.1.32
7.5...........=
......................... EDID contains codes fro=
m the
latest released standard. =
=
span>21
1.1.33
7.6...........=
............................................ At least one string tab=
le
contains one string.  =
; =
21
1.1.34
7.7...........=
............................................. One UTF encoding is sel=
ected
per string table. &n=
bsp; 21
1.1.35
7.8 String tables are laid =
out in
correct order by numerical segment index precedence, then order encountered=
in
the block...........................=
...........................................................................=
...................... 21
1.1.36
7.9...... The neutral string tabl=
e, if
present, is the first table in the first block.  =
; 21
1.1.37
7.10 If multiple string tabl=
es are
present in an extension block, then there are no unused bytes between string
tables..............................=
...........................................................................=
........................................... 21
1.1.38
7.11...........=
......... Unused bytes in an exte=
nsion
block should be filled with zero’s.&n=
bsp;  =
; 21
1.1.39
7.12 There can only be one s=
tring
table for every given given combination of language IDs and country IDs.
1.1.40=
8...........................................=
.......................................................... APPENDIX D – Glossary =
21
1.1.41
8.1...........=
...........................................................................=
.............. Neutral Stri=
ng
Table<=
span
style=3D'mso-tab-count:1'> &=
nbsp; 21
The E-EDID extension defined in this document defines strings fields that can be used to replace those in the Base EDID structure. The definitions in= this case allow the use of different string representations. The string length limit is also in= creased.
The
Extended Display Identification Data (EDID) standard already contains
definitions for character string fields.&n=
bsp;
However these definitions are limited to supporting ASCII
representations only. T=
he
length of the string is also limited in the current definitions. This limits their use in
internationally.
The
EDID Standard was developed by VESA to meet, exceed and/or complement certa=
in
criteria. These criteria are set forth as Standard Objectives as follows:
Note: Versions identified h=
ere
are current, but users of this standard are advised to ensure they have the
latest versions of referenced standards and documents.
·
VESA Enhanced Extended Display Identification Data Standard - E-EDI=
D
·
Information about Unicode can be found at http://www.unicode.org
·
ISO 639-2:ASCII-3:
http://www.loc.gov/standards/iso639-2/englangn.html
·
ISO 3166-1:Numeric 3 (UN=
):
http://www.unicode.org/unicode/onlinedat/countries.html
·
EISA/ISA PNPID: http://www.microsoft.com/=
hwdev/pnpid.asp
·
SCSU Unicode Compression:
http://www.unicode.org/unicode/reports/tr6/
·
BOCU Unicode Compression:
http://oss.software.ibm.com/icu/docs/papers/binary_ordered_compression_for_=
unicode.html
<= o:p>