VESA Enhanced EDID Standard Release A, Rev.2
Copyright 1994 - 2006 Video Electronics Standards Association Page 14 of 93
2.1.1 EDID 1.0
EDID structure 1.0 (Version 1, Revision 0) was the original 128-byte file format introduced in the
DDC Standard Version 1.0 Revision 0 issued in August 1994. EDID 1.0 shall not be used in new
display products.
2.1.2 EDID 1.1
EDID structure 1.1 added definitions for monitor descriptors as an alternate use of the space originally
reserved for detailed timings, as well as definitions for previously unused fields. Structure 1.1 was
introduced in the EDID Standard Version 2 issued in April 1996. EDID 1.1 shall not be used in new
display products.
2.1.3 EDID 1.2
EDID structure 1.2 added definitions to existing data fields. Structure 1.2 was introduced in EDID
Standard Version 3. EDID 1.2 shall not be used in new display products.
2.1.4 EDID 1.3
EDID structure 1.3 added definitions for secondary Generalized Timing Formula (GTF) curve
coefficients. Structure 1.3 was introduced in E-EDID Standard Release A issued in September 1999.
EDID 1.3 was based on the same core as all other EDID 1.x structures.
Structure 1.3 is a superset of structure 1.2. The main difference between the two is that 1.3 allows
the Monitor Range Limits descriptor to define coefficients for a secondary GTF curve, and mandates
a certain set of monitor descriptors. EDID 1.3 is strongly discouraged for use in new display
product designs.
2.1.5 EDID 1.4
EDID structure 1.4 is introduced in this document. EDID structure 1.4 adds support for Consumer
Electronic Products (Model Year and Aspect Ratio) and PC Products (CVT, Established Timings III,
Additional Video Interfaces, Expanded Display Range Limits, optional Product Features and Timing
Mode Priorities). Certain Display Descriptors (formally known as Monitor Descriptors) that were
mandatory in EDID 1.3 are now optional.
EDID 1.4 is based on the same core as all other EDID 1.x structures. EDID 1.4 is the new baseline
for EDID data structures and is strongly recommended for all new designs. However, there are a few
incompatible data fields in EDID 1.4 that were changed to support emerging industry requirements.
Structure 1.4 is a superset of structure 1.3. The main difference between the two is that 1.4 allows the
Display Range Limits descriptor to define support for CVT, and certain display descriptors mandated in
EDID 1.3 are now optional. Some additional changes have been included to provide support for DTV
products.
2.1.6 EDID Structures --- Comparison Table
Table 2.2 contains a comparison of EDID Data Structures (1.0 through 1.4). The table contains a listing
of required, optional and optional (but recommended)
ELEMENTS. Refer to the Key in Table 2.3 for the
definitions of the symbols used in the Table 2.2.