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Extended Display Identification Data (EDID) and Enhanced EDID (E-EDID) are metadata formats for display devices to describe their capabilities to a video source (e.g., graphics card or set-top box). The data format is defined by a standard published by the Video Electronics Standards Association (VESA).

The EDID data structure includes manufacturer name and serial number, product type, phosphor or filter type (as chromaticity data), timings supported by the display, display size, luminance data and (for digital displays only) pixel mapping data.

DisplayID is a VESA standard targeted to replace EDID and E-EDID extensions with a uniform format suited for both PC monitor and consumer electronics devices.

• Background

• EDID Extensions assigned by VESA

• Revision history

• Limitations

• EDID 1.4 data format

• Structure, version 1.4

• Detailed Timing Descriptor

• Monitor Descriptors

• Display Range Limits

• Additional white point descriptor

• Color management data descriptor

• CVT 3-byte timing codes descriptor

• Additional standard timings

• CTA EDID Timing Extension Block

• CTA-861 Standard

• CTA Extension Block

• CTA Extension data format

• CTA Data Blocks

• References

• External links

EDID structure (base block) versions range from v1.0 to v1.4; all these define upwards-compatible 128-byte structures. Version 2.0 defined a new 256-byte structure but it has been deprecated and replaced by E-EDID which supports multiple extension blocks. HDMI versions 1.0–1.3c use E-EDID v1.3.cite-ref-1[1]

Before Display Data Channel (DDC) and EDID were defined, there was no standard way for a graphics card to know what kind of display device it was connected to. Some VGA connectors in personal computers provided a basic form of identification by connecting one, two or three pins to ground, but this coding was not standardized.

This problem is solved by EDID and DDC, as it enables the display to send information to the graphics card it is connected to. The transmission of EDID information usually uses the Display Data Channel protocol, specifically DDC2B, which is based on I²C-bus (DDC1 used a different serial format which never gained popularity). The data is transmitted via the cable connecting the display and the graphics card; VGA, DVI, DisplayPort and HDMI are supported.

The EDID is often stored in the monitor in the firmware chip called serial EEPROM (electrically erasable programmable read-only memory) and is accessible via the I²C-bus at address 0x50. The EDID PROM can often be read by the host PC even if the display itself is turned off.

Many software packages can read and display the EDID information, such as read-edidcite-ref-2[2] for Linux and DOS, PowerStripcite-ref-3[3] for Microsoft Windows and the X.Org Server for Linux and BSD unix. Mac OS X natively reads EDID information and programs such as SwitchResXcite-ref-4[4] or DisplayConfigXcite-ref-5[5] can display the information as well as use it to define custom resolutions.

E-EDID was introduced at the same time as E-DDC, which supports multiple extensions blocks and deprecated EDID version 2.0 structure (it can be incorporated in E-EDID as an optional extension block). Data fields for preferred timing, range limits, and monitor name are required in E-EDID. E-EDID also adds support for the Dual GTF curve concept and partially changed the encoding of aspect ratio within the standard timings.

With the use of extensions, E-EDID structure can be extended up to 32 KiB, because the E-DDC added the capability to address multiple (up to 128) 256 byte segments.

• Timing Extension (00)

• Additional Timing Data Block (CTA EDID Timing Extension) (02)

• Video Timing Block Extension (VTB-EXT) (10)

• EDID 2.0 Extension (20)

• Display Information Extension (DI-EXT) (40)

• Localized String Extension (LS-EXT) (50)

• Microdisplay Interface Extension (MI-EXT) (60)

• Display ID Extension (70)

• Display Transfer Characteristics Data Block (DTCDB) (A7, AF, BF)

• Block Map (F0)

• Display Device Data Block (DDDB) (FF): contains information such as subpixel layoutcite-ref-6[6]

• Extension defined by monitor manufacturer (FF): According to LS-EXT, actual contents varies from manufacturer. However, the value is later used by DDDB.

• August 1994, DDC standard version 1 – introduce EDID v1.0.

• April 1996, EDID standard version 2 – introduce EDID v1.1.

• November 1997, EDID standard version 3 – introduce EDID v1.2 and EDID v2.0.

• September 1999, E-EDID Standard Release A – introduce EDID v1.3 and E-EDID v1.0, which supports multiple extensions blocks.

• February 2000, E-EDID Standard Release A - introduce E-EDID v1.3 (used in HDMI), based on EDID v1.3. EDID v2.0 deprecated.

• September 2006, E-EDID Standard Release A – introduce E-EDID v1.4, based on EDID v1.4.

Some graphics card drivers have historically coped poorly with the EDID, using only its standard timing descriptors rather than its Detailed Timing Descriptors (DTDs). Even in cases where the DTDs were read, the drivers are/were still often limited by the standard timing descriptor limitation that the horizontal/vertical resolutions must be evenly divisible by 8. This means that many graphics cards cannot express the native resolutions of the most common widescreen flat-panel displays and liquid-crystal display TVs. The number of vertical pixels is calculated from the horizontal resolution and the selected aspect ratio. To be fully expressible, the size of widescreen display must thus be a multiple of 16×9 pixels. For 1366×768 pixel Wide XGA panels the nearest resolution expressible in the EDID standard timing descriptor syntax is 1360×765 pixels, typically leading to 3-pixel-thin black bars. Specifying 1368 pixels as the screen width would yield an unnatural screen height of 769.5 pixels.

Many Wide XGA panels do not advertise their native resolution in the standard timing descriptors, 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 or the driver must correctly interpret the DTD and be able to resolve resolutions whose size is not divisible by 8. Special programs are available to override the standard timing descriptors from EDID data. Even this is not always possible, as some vendors' graphics drivers (notably those of Intel) require specific registry hacks to implement custom resolutions, which can make it very difficult to use the screen's native resolution.cite-ref-7[7]

| Bytes | Description | |

|---|---|---|

| 0–19 | Header information | |

| 0–7 | Fixed header pattern: 00 FF FF FF FF FF… | |

| 8–9 | Manufacturer ID. This is a legacy Plug… | |

| 8–9 | Bit 15 | 0 = reserved |

| 8–9 | Bits 14–10 | First letter of manufacturer ID (byte 8… |

| 8–9 | Bits 9–5 | Second letter of manufacturer ID (byte… |

| 8–9 | Bits 4–0 | Third letter of manufacturer ID (byte 9… |

| 10–11 | Manufacturer product code. 16-bit hex n… | |

| 12–15 | Serial number. 32 bits, little-endian. | |

| 16 | Week of manufacture; or FF model year f… | |

| 17 | Year of manufacture, or year of model,… | |

| 18 | EDID version, usually 01 (for 1.3 and 1… | |

| 19 | EDID revision, usually 03 (for 1.3) or… | |

| 20–24 | Basic display parameters | |

| 20 | Video input parameters bitmap | |

| 20 | Bit 7 = 1 | Digital input. If set, the following bi… |

| 20 | Bits 6–4 | Bit depth: 000 = undefined 001 = 6 010… |

| 20 | Bits 3–0 | Video interface: 0000 = undefined 0001… |

| 20 | Bit 7 = 0 | Analog input. If clear, the following b… |

| 20 | Bits 6–5 | Video white and sync levels, relative t… |

| 20 | Bit 4 | Blank-to-black setup (pedestal) expected |

| 20 | Bit 3 | Separate sync supported |

| 20 | Bit 2 | Composite sync (on HSync) supported |

| 20 | Bit 1 | Sync on green supported |

| 20 | Bit 0 | VSync pulse must be serrated when compo… |

| 21 | Horizontal screen size, in centimetres… | |

| 22 | Vertical screen size, in centimetres. I… | |

| 23 | Display gamma, factory default (range 1… | |

| 24 | Supported features bitmap | |

| 24 | Bit 7 | DPMS standby supported |

| 24 | Bit 6 | DPMS suspend supported |

| 24 | Bit 5 | DPMS active-off supported |

| 24 | Bits 4–3 | Display type (digital): 00 = RGB 4:4:4… |

| 24 | Bits 4–3 | Display type (analog): 00 = monochrome… |

| 24 | Bit 2 | Standard sRGB colour space. Bytes 25–34… |

| 24 | Bit 1 | Preferred timing mode specified in desc… |

| 24 | Bit 0 | Continuous timings with GTF or CVT |

| 25–34 | Chromaticity coordinates. 10-bit 2° CIE… | |

| 25 | Red and green least-significant bits (2… | |

| 25 | Bits 7–6 | Red x value least-significant 2 bits |

| 25 | Bits 5–4 | Red y value least-significant 2 bits |

| 25 | Bits 3–2 | Green x value least-significant 2 bits |

| 25 | Bits 1–0 | Green y value least-significant 2 bits |

| 26 | Blue and white least-significant 2 bits | |

| 27 | Red x value most significant 8 bits (2… | |

| 28 | Red y value most significant 8 bits | |

| 29–30 | Green x and y value most significant 8… | |

| 31–32 | Blue x and y value most significant 8 b… | |

| 33–34 | Default white point x and y value most… | |

| 35–37 | Established timing bitmap. Supported bi… | |

| 35 | Bit 7 | 720×400 @ 70 Hz ( VGA ) |

| 35 | Bit 6 | 720×400 @ 88 Hz ( XGA ) |

| 35 | Bit 5 | 640×480 @ 60 Hz ( VGA ) |

| 35 | Bit 4 | 640×480 @ 67 Hz (Apple Macintosh II ) |

| 35 | Bit 3 | 640×480 @ 72 Hz |

| 35 | Bit 2 | 640×480 @ 75 Hz |

| 35 | Bit 1 | 800×600 @ 56 Hz |

| 35 | Bit 0 | 800×600 @ 60 Hz |

| 36 | Bit 7 | 800×600 @ 72 Hz |

| 36 | Bit 6 | 800×600 @ 75 Hz |

| 36 | Bit 5 | 832×624 @ 75 Hz (Apple Macintosh II ) |

| 36 | Bit 4 | 1024×768 @ 87 Hz, interlaced (1024×768i) |

| 36 | Bit 3 | 1024×768 @ 60 Hz |

| 36 | Bit 2 | 1024×768 @ 70 Hz |

| 36 | Bit 1 | 1024×768 @ 75 Hz |

| 36 | Bit 0 | 1280×1024 @ 75 Hz |

| 37 | Bit 7 | 1152x870 @ 75 Hz (Apple Macintosh II ) |

| 37 | Bits 6–0 | Other manufacturer-specific display mod… |

| 38–53 | Standard timing information. Up to 8 2-… | |

| 38 | Standard timing 1: X resolution, 00 = r… | |

| 39 | Bits 7–6 | Standard timing 1: Image aspect ratio:… |

| 39 | Bits 5–0 | Vertical frequency, datavalue + 60 (60–… |

| 40-41 | Standard timing 2 | |

| 42-43 | Standard timing 3 | |

| 44-45 | Standard timing 4 | |

| 46-47 | Standard timing 5 | |

| 48-49 | Standard timing 6 | |

| 50-51 | Standard timing 7 | |

| 52-53 | Standard timing 8 | |

| 54–125 | Display timing descriptor followed by d… | |

| 54–71 | Preferred timing descriptor | 18 byte detailed timing descriptors or… |

| 72–89 | Descriptor 2 | 18 byte detailed timing descriptors or… |

| 90–107 | Descriptor 3 | 18 byte detailed timing descriptors or… |

| 108–125 | Descriptor 4 | 18 byte detailed timing descriptors or… |

| 126-127 | Extension flag and checksum | |

| 126 | Number of extensions to follow. 0 if no… | |

| 127 | Checksum. Sum of all 128 bytes should e… | |

| Bytes | Description | |

|---|---|---|

| 0–1 | Pixel clock. 00 = reserved; otherwise i… | |

| 2 | Horizontal active pixels 8 lsbits (0–25… | |

| 3 | Horizontal blanking pixels 8 lsbits (0–… | |

| 4 | Bits 7–4 | Horizontal active pixels 4 msbits (0–15) |

| 4 | Bits 3–0 | Horizontal blanking pixels 4 msbits (0–… |

| 5 | Vertical active lines 8 lsbits (0–255) | |

| 6 | Vertical blanking lines 8 lsbits (0–255) | |

| 7 | Bits 7–4 | Vertical active lines 4 msbits (0–15) |

| 7 | Bits 3–0 | Vertical blanking lines 4 msbits (0–15) |

| 8 | Horizontal front porch (sync offset) pi… | |

| 9 | Horizontal sync pulse width pixels 8 ls… | |

| 10 | Bits 7–4 | Vertical front porch (sync offset) line… |

| 10 | Bits 3–0 | Vertical sync pulse width lines 4 lsbit… |

| 11 | Bits 7–6 | Horizontal front porch (sync offset) pi… |

| 11 | Bits 5–4 | Horizontal sync pulse width pixels 2 ms… |

| 11 | Bits 3–2 | Vertical front porch (sync offset) line… |

| 11 | Bits 1–0 | Vertical sync pulse width lines 2 msbit… |

| 12 | Horizontal image size, mm, 8 lsbits (0–… | |

| 13 | Vertical image size, mm, 8 lsbits (0–25… | |

| 14 | Bits 7–4 | Horizontal image size, mm, 4 msbits (0–… |

| 14 | Bits 3–0 | Vertical image size, mm, 4 msbits (0–15) |

| 15 | Horizontal border pixels (one side; tot… | |

| 16 | Vertical border lines (one side; total… | |

| 17 | Features bitmap | |

| 17 | Bit 7 | Signal Interface Type: 0 = non-interlac… |

| 17 | Bits 6–5 | Stereo mode (combine bits 6–5 with bit… |

| 17 | Bit 4 = 0 | Analog sync. If set, the following bit… |

| 17 | Bit 3 | Sync type: 0 = analog composite; 1 = bi… |

| 17 | Bit 2 | Serration: 0 = without serrations; 1 =… |

| 17 | Bit 1 | Sync on red and blue lines additionally… |

| 17 | Bits 4–3 = 10 | Digital sync., composite (on HSync). If… |

| 17 | Bit 2 | Serration 0 = without serration; 1 = wi… |

| 17 | Bit 1 | Horizontal sync polarity: 0 = negative;… |

| 17 | Bits 4–3 = 11 | Digital sync., separate If set, the fol… |

| 17 | Bit 2 | Vertical sync polarity: 0 = negative; 1… |

| 17 | Bit 1 | Horizontal sync polarity: 0 = negative;… |

| 17 | Bit 0 | Stereo mode (combines with bits 6–5) |

When used for another descriptor, the pixel clock and some other bytes are set to 0:

| Bytes | Description |

|---|---|

| 0–1 | 0 = Monitor Descriptor (cf. Detailed Ti… |

| 2 | 0 = reserved |

| 3 | Descriptor type. FA – FF currently defi… |

| 4 | 0 = reserved, except for Display Range… |

| 5–17 | Defined by descriptor type. If text, co… |

Currently defined descriptor types are:

• FF: Monitor serial number (ASCII text)

• FE: Unspecified text (ASCII text)

• FD: Monitor range limits. 6- or 13-byte (with additional timing) binary descriptor.

• FC: Monitor name (ASCII text), for example "PHL 223V5".

• FB: Additional white point data. 2× 5-byte descriptors, padded with 0A 20 20.

• FA: Additional standard timing identifiers. 6× 2-byte descriptors, padded with 0A.

• F9: Display Color Management (DCM).

• F8: CVT 3-Byte Timing Codes.

• F7: Additional standard timing 3.

• 10: Dummy identifier.

• 00–0F: Manufacturer reserved descriptors.

| Bytes | Description | |

|---|---|---|

| 0–1 | 00 00 = Display Descriptor | |

| 2 | 00 = reserved | |

| 3 | FD = Display Range Limits Descriptor | |

| 4 | Offsets for display range limits | |

| 4 | Bits 7–4 | 00 = reserved |

| 4 | Bits 3–2 | Horizontal rate offsets: 00 = none; 10… |

| 4 | Bits 1–0 | Vertical rate offsets: 00 = none; 10 =… |

| 5 | Minimum | vertical field rate (1–255 Hz; 256–510… |

| 6 | Maximum | vertical field rate (1–255 Hz; 256–510… |

| 7 | Minimum | horizontal line rate (1–255 kHz; 256–51… |

| 8 | Maximum | horizontal line rate (1–255 kHz; 256–51… |

| 9 | Maximum pixel clock rate, rounded up to… | |

| 10 | Extended timing information type: 00 =… | |

| 11–17 | Video timing parameters (if byte 10 is… | |

| Bytes | Description |

|---|---|

| 10 | 02 |

| 11 | 00 = reserved |

| 12 | Start frequency for secondary curve, di… |

| 13 | GTF C value, multiplied by 2 (0–127.5) |

| 14–15 | GTF M value (0–65535, little-endian) |

| 16 | GTF K value (0–255) |

| 17 | GTF J value, multiplied by 2 (0–127.5) |

| Bytes | Description | |

|---|---|---|

| 10 | 04 | |

| 11 | Bits 7–4 | CVT major version (1–15) |

| 11 | Bits 3–0 | CVT minor version (0–15) |

| 12 | Bits 7–2 | Additional clock precision in 0.25 MHz… |

| 12 | Bits 1–0 | Maximum active pixels per line, 2-bit m… |

| 13 | Maximum active pixels per line, 8-bit l… | |

| 14 | Aspect ratio bitmap | |

| 14 | Bit 7 | 4∶3 |

| 14 | Bit 6 | 16∶9 |

| 14 | Bit 5 | 16∶10 |

| 14 | Bit 4 | 5∶4 |

| 14 | Bit 3 | 15∶9 |

| 14 | Bits 2–0 | 000 = reserved |

| 15 | Bits 7–5 | Aspect ratio preference: 000 = 4∶3 001… |

| 15 | Bit 4 | CVT-RB reduced blanking (preferred) |

| 15 | Bit 3 | CVT standard blanking |

| 15 | Bits 2–0 | 000 = reserved |

| 16 | Scaling support bitmap | |

| 16 | Bit 7 | Horizontal shrink |

| 16 | Bit 6 | Horizontal stretch |

| 16 | Bit 5 | Vertical shrink |

| 16 | Bit 4 | Vertical stretch |

| 16 | Bits 3–0 | 0000 = reserved |

| 17 | Preferred vertical refresh rate (1–255) | |

| Bytes | Description | |

|---|---|---|

| 0–4 | 00 00 00 FB 00 | |

| 5 | White point index number (1–255). Usual… | |

| 6 | White point CIE xy coordinates least-si… | |

| 6 | Bits 7–4 | 000 = reserved |

| 6 | Bits 3–2 | White point x value least-significant 2… |

| 6 | Bits 1–0 | White point y value least-significant 2… |

| 7 | White point x value most significant 8… | |

| 8 | White point y value most significant 8… | |

| 9 | datavalue = (gamma − 1)×100 (1.0–3.54,… | |

| 10–14 | Second descriptor. Index number starts… | |

| 15–17 | Unused, padded with 0A 20 20 . | |

| Bytes | Description |

|---|---|

| 0–4 | 00 00 00 F9 00 |

| 5 | Version: 03 |

| 6 | Red a 3 lsb |

| 7 | Red a 3 msb |

| 8 | Red a 2 lsb |

| 9 | Red a 2 msb |

| 10 | Green a 3 lsb |

| 11 | Green a 3 msb |

| 12 | Green a 2 lsb |

| 13 | Green a 2 msb |

| 14 | Blue a 3 lsb |

| 15 | Blue a 3 msb |

| 16 | Blue a 2 lsb |

| 17 | Blue a 2 msb |

| Bytes | Description | |

|---|---|---|

| 0–4 | 00 00 00 F8 00 | |

| 5 | Version: 01 | |

| 6-8 | CVT timing descriptor #1 | |

| 6 | Addressable lines per field 8-bit lsb | |

| 7 | Bits 7–4 | Addressable lines per field 4-bit msb |

| 7 | Bits 3–2 | Aspect ratio: 00 = 4∶3 01 = 16∶9 10 = 1… |

| 7 | Bits 1–0 | 00 = reserved |

| 8 | Bit 7 | 0 = reserved |

| 8 | Bits 6–5 | Preferred vertical rate: 00 : 50 Hz 01… |

| 8 | Vertical rate bitmap | |

| 8 | Bit 4 | 50 Hz CVT |

| 8 | Bit 3 | 60 Hz CVT |

| 8 | Bit 2 | 75 Hz CVT |

| 8 | Bit 1 | 85 Hz CVT |

| 8 | Bit 0 | 60 Hz CVT reduced blanking |

| 9–11 | CVT timing descriptor #2 | |

| 12–14 | CVT timing descriptor #3 | |

| 15–17 | CVT timing descriptor #4 | |

V e r t i c a l l i n e s = ( A d d r e s s a b l e l i n e s p e r f i e l d + 1 ) ∗ 2 {\displaystyle {\mathsf {Vertical\ lines}}=({\mathsf {Addressable\ lines\ per\ field}}+1)*2}

H o r i z o n t a l p i x e l s = ⌊ V e r t i c a l l i n e s ∗ A s p e c t r a t i o / 8 ⌋ ∗ 8 {\displaystyle {\mathsf {Horizontal\ pixels}}=\lfloor {\mathsf {Vertical\ lines}}*{\mathsf {Aspect\ ratio}}/8\rfloor *8}

| Bytes | Description | | |

|---|---|---|---|

| 0–4 | 00 00 00 F7 00 | | |

| 5 | Version: 10 | | |

| 6 | Bit 7 | 640×350 | @ 85 Hz |

| 6 | Bit 6 | 640×400 | @ 85 Hz |

| 6 | Bit 5 | 720×400 | @ 85 Hz |

| 6 | Bit 4 | 640×480 | @ 85 Hz |

| 6 | Bit 3 | 848×480 | @ 60 Hz |

| 6 | Bit 2 | 800×600 | @ 85 Hz |

| 6 | Bit 1 | 1024×768 | @ 85 Hz |

| 6 | Bit 0 | 1152×864 | @ 85 Hz |

| 7 | Bit 7 | 1280×768 | @ 60 Hz (CVT-RB) |

| 7 | Bit 6 | 1280×768 | @ 60 Hz |

| 7 | Bit 5 | 1280×768 | @ 75 Hz |

| 7 | Bit 4 | 1280×768 | @ 85 Hz |

| 7 | Bit 3 | 1280×960 | @ 60 Hz |

| 7 | Bit 2 | 1280×960 | @ 85 Hz |

| 7 | Bit 1 | 1280×1024 | @ 60 Hz |

| 7 | Bit 0 | 1280×1024 | @ 85 Hz |

| 8 | Bit 7 | 1360×768 | @ 60 Hz (CVT-RB) |

| 8 | Bit 6 | 1280×768 | @ 60 Hz |

| 8 | Bit 5 | 1440×900 | @ 60 Hz (CVT-RB) |

| 8 | Bit 4 | 1440×900 | @ 75 Hz |

| 8 | Bit 3 | 1440×900 | @ 85 Hz |

| 8 | Bit 2 | 1400×1050 | @ 60 Hz (CVT-RB) |

| 8 | Bit 1 | 1400×1050 | @ 60 Hz |

| 8 | Bit 0 | 1400×1050 | @ 75 Hz |

| 9 | Bit 7 | 1400×1050 | @ 85 Hz |

| 9 | Bit 6 | 1680×1050 | @ 60 Hz (CVT-RB) |

| 9 | Bit 5 | 1680×1050 | @ 60 Hz |

| 9 | Bit 4 | 1680×1050 | @ 75 Hz |

| 9 | Bit 3 | 1680×1050 | @ 85 Hz |

| 9 | Bit 2 | 1600×1200 | @ 60 Hz |

| 9 | Bit 1 | 1600×1200 | @ 65 Hz |

| 9 | Bit 0 | 1600×1200 | @ 70 Hz |

| 10 | Bit 7 | 1600×1200 | @ 75 Hz |

| 10 | Bit 6 | 1600×1200 | @ 85 Hz |

| 10 | Bit 5 | 1792×1344 | @ 60 Hz |

| 10 | Bit 4 | 1792×1344 | @ 75 Hz |

| 10 | Bit 3 | 1856×1392 | @ 60 Hz |

| 10 | Bit 2 | 1856×1392 | @ 75 Hz |

| 10 | Bit 1 | 1920×1200 | @ 60 Hz (CVT-RB) |

| 10 | Bit 0 | 1920×1200 | @ 60 Hz |

| 11 | Bit 7 | 1920×1200 | @ 75 Hz |

| 11 | Bit 6 | 1920×1200 | @ 85 Hz |

| 11 | Bit 5 | 1920×1440 | @ 60 Hz |

| 11 | Bit 4 | 1920×1440 | @ 75 Hz |

| 11 | Bits 3–0 | 0000 = reserved | |

| 12–17 | Unused, must be 0 . | | |

The CTA EDID Extension was first introduced in EIA/CEA-861.

The ANSI/CTA-861 industry standard, which according to CTA is now their "Most Popular Standard",cite-ref-10[10] has since been updated several times, most notably with the 861-B revision (published in May 2002, which added version 3 of the extension, adding Short Video Descriptors and advanced audio capability/configuration information), 861-D (published in July 2006 and containing updates to the audio segments), 861-E in March 2008,cite-ref-11[11] 861-F, which was published on June 4, 2013,cite-ref-12[12] 861-H in December 2020,cite-ref-13[13] and, most recently, 861-I, which was published in February 2023.cite-ref-14[14] Coinciding with the publication of CEA-861-F in 2013, Brian Markwalter, senior vice president, research and standards, stated: "The new edition includes a number of noteworthy enhancements, including support for several new Ultra HD and widescreen video formats and additional colorimetry schemes.”cite-ref-15[15]

Version CTA-861-G,cite-ref-16[16] originally published in November 2016, was made available for free in November 2017, along with updated versions -E and -F, after some necessary changes due to a trademark complaint. All CTA standards are free to everyone since May 2018.cite-ref-17[17]cite-ref-18[18]

The most recent full version is CTA-861-I,cite-ref-19[19] published in February 2023, available for free after registration. It combines the previous version, CTA-861-H,cite-ref-20[20] from January 2021 with an amendment, CTA-861.6,cite-ref-21[21] published in February 2022 and includes a new formula to calculate Video Timing Formats, OVT.cite-ref-22[22] Other changes include a new annex to elaborate on the audio speaker room configuration system that was introduced with the 861.2 amendment, and some general clarifications and formatting cleanup.

An amendment to CTA-861-I, CTA-861.7,cite-ref-23[23] was published in June 2024. It contains updates to CTA 3D Audio, and clarifications on Content Type Indication, and on 4:2:0 support for VTDBs and VFDBs. It also introduces a new Product ID Data Block, to replace the Manufacturer PNP ID in the first block of the EDID, since the UEFI is phasing out assigning new PNP IDs.

Version 1 of the extension block (as defined in CEA−861) allowed the specification of video timings only through the use of 18-byte Detailed Timing Descriptors (DTD) (as detailed in EDID 1.3 data format above). DTD timings are listed in order of preference in the CEA EDID Timing Extension.

Version 2 (as defined in 861-A) added the capability to designate a number of DTDs as "native" (i.e., matching the resolution of the display) and also included some "basic discovery" functionality for whether the display device contains support for "basic audio", YCBCR pixel formats, and underscan.

Version 3 (from the 861-B spec onward) allows two different ways to specify digital video timing formats: As in Version 1 & 2 by the use of 18-byte DTDs, or by the use of the Short Video Descriptor (SVD) (see below). HDMI 1.0–1.3c uses this version.

Version 3 also defines a format for a collection of data blocks, which in turn can contain a number of individual descriptors. This Data Block Collection (DBC) initially had four types of Data Blocks (DBs): Video Data Blocks containing the aforementioned Short Video Descriptor (SVD), Audio Data Blocks containing Short Audio Descriptors (SAD), Speaker Allocation Data Blocks containing information about the speaker configuration of the display device, and Vendor Specific Data Blocks which can contain information specific to a given vendor's use. Subsequent versions of CTA-861 defined additional data blocks.

| Byte | Description | |

|---|---|---|

| 0 | Extension tag (which kind of extension… | |

| 1 | Revision number (version number); 03 fo… | |

| 2 | Byte number (decimal) within this block… | |

| 3 | With version 2 and up: number of Native… | |

| 3 | Bit 7 | 1 if display supports underscan, 0 if n… |

| 3 | Bit 6 | 1 if display supports basic audio, 0 if… |

| 3 | Bit 5 | 1 if display supports YC B C R 4∶4∶4, 0… |

| 3 | Bit 4 | 1 if display supports YC B C R 4∶2∶2, 0… |

| 3 | Bit 3–0 | Total number of native formats in the D… |

| 4–126 | With version 3 and up: Data Block Colle… | |

| 4–126 | 18-byte descriptors, starting at the by… | |

| 4–126 | Padding, from the absence of an 18-byte… | |

| 127 | Checksum. Value such that the one-byte… | |

The Data Block Collection contains one or more data blocks detailing video, audio, and speaker placement information about the display. The blocks can be placed in any order, and the initial byte of each block defines both its type and its length:

| Byte | Description | |

|---|---|---|

| 0 | Bit 7–5 | Block Type Tag 001 1: Audio (ADB, conta… |

| 0 | Bit 4–0 | Total number of bytes in this block fol… |

If the Tag code is 7, an Extended Tag Code is present in the first payload byte of the data block, and the second payload byte represents the first payload byte of the extended data block.

| Byte | Description | |

|---|---|---|

| 1 | Bit 7–0 | Extended Block Type Tag 00000000 0: Vid… |

Once one data block has ended, the next byte is assumed to be the beginning of the next data block. This is the case until the byte (designated in byte 2, above) where the DTDs are known to begin.

As noted, several data blocks are defined by the extension.

The Video Data Blocks will contain one or more 1-byte Short Video Descriptors (SVDs).

| Byte | Description | |

|---|---|---|

| 0 | Data block header | |

| 1 | Bit 7 | 1 to designate that this should be cons… |

| 1 | Bit 6–0 | VIC : Index value to a table of standar… |

| VIC | Short name | Aspect ratio | |

|---|---|---|---|

| VIC | Short name | DAR | PAR |

| 1 | DMT0659 | 4∶3 | 1∶1 |

| 2 | 480p | 4∶3 | 8∶9 |

| 3 | 480pH | 16∶9 | 32∶27 |

| 4 | 720p | 16∶9 | 1∶1 |

| 5 | 1080i | 16∶9 | 1∶1 |

| 6 | 480i | 4∶3 | 8∶9 |

| 7 | 480iH | 16∶9 | 32∶27 |

| 8 | 240p | 4∶3 | 4∶9 |

| 9 | 240pH | 16∶9 | 16∶27 |

| 10 | 480i4x | 4∶3 | 2:9-20:9 |

| 11 | 480i4xH | 16∶9 | 8:27-80:27 |

| 12 | 240p4x | 4∶3 | 1:9-10:9 |

| 13 | 240p4xH | 16∶9 | 4:27-40:27 |

| 14 | 480p2x | 4∶3 | 4:9, 8∶9 |

| 15 | 480p2xH | 16∶9 | 16:27, 32∶27 |

| 16 | 1080p | 16∶9 | 1∶1 |

| 17 | 576p | 4∶3 | 16∶15 |

| 18 | 576pH | 16∶9 | 64∶45 |

| 19 | 720p50 | 16∶9 | 1∶1 |

| 20 | 1080i25 | 16∶9 | 1∶1 |

| 21 | 576i | 4∶3 | 16∶15 |

| 22 | 576iH | 16∶9 | 64∶45 |

| 23 | 288p | 4∶3 | 8∶15 |

| 24 | 288pH | 16∶9 | 32∶45 |

| 25 | 576i4x | 4∶3 | 2:15-20:15 |

| 26 | 576i4xH | 16∶9 | 16:45-160:45 |

| 27 | 288p4x | 4∶3 | 1:15-10:15 |

| 28 | 288p4xH | 16∶9 | 8:45-80:45 |

| 29 | 576p2x | 4∶3 | 8:15, 16∶15 |

| 30 | 576p2xH | 16∶9 | 32:45, 64∶45 |

| 31 | 1080p50 | 16∶9 | 1∶1 |

| 32 | 1080p24 | 16∶9 | 1∶1 |

| 33 | 1080p25 | 16∶9 | 1∶1 |

| 34 | 1080p30 | 16∶9 | 1∶1 |

| 35 | 480p4x | 4∶3 | 2:9, 4:9, 8∶9 |

| 36 | 480p4xH | 16∶9 | 8:27, 16:27, 32∶27 |

| 37 | 576p4x | 4∶3 | 4:15, 8:15, 16∶15 |

| 38 | 576p4xH | 16∶9 | 16:45, 32:45, 64∶45 |

| 39 | 1080i25 | 16∶9 | 1∶1 |

| 40 | 1080i50 | 16∶9 | 1∶1 |

| 41 | 720p100 | 16∶9 | 1∶1 |

| 42 | 576p100 | 4∶3 | 16∶15 |

| 43 | 576p100H | 16∶9 | 64∶45 |

| 44 | 576i50 | 4∶3 | 16∶15 |

| 45 | 576i50H | 16∶9 | 64∶45 |

| 46 | 1080i60 | 16∶9 | 1∶1 |

| 47 | 720p120 | 16∶9 | 1∶1 |

| 48 | 480p119 | 4∶3 | 8∶9 |

| 49 | 480p119H | 16∶9 | 32∶27 |

| 50 | 480i59 | 4∶3 | 16∶15 |

| 51 | 480i59H | 16∶9 | 64∶45 |

| 52 | 576p200 | 4∶3 | 16∶15 |

| 53 | 576p200H | 16∶9 | 64∶45 |

| 54 | 576i100 | 4∶3 | 16∶15 |

| 55 | 576i100H | 16∶9 | 64∶45 |

| 56 | 480p239 | 4∶3 | 8∶9 |

| 57 | 480p239H | 16∶9 | 32∶27 |

| 58 | 480i119 | 4∶3 | 8∶9 |

| 59 | 480i119H | 16∶9 | 32∶27 |

| 60 | 720p24 | 16∶9 | 1∶1 |

| 61 | 720p25 | 16∶9 | 1∶1 |

| 62 | 720p30 | 16∶9 | 1∶1 |

| 63 | 1080p120 | 16∶9 | 1∶1 |

| 64 | 1080p100 | 16∶9 | 1∶1 |

| 65 | 720p24 | 64∶27 | 4∶3 |

| 66 | 720p25 | 64∶27 | 4∶3 |

| 67 | 720p30 | 64∶27 | 4∶3 |

| 68 | 720p50 | 64∶27 | 4∶3 |

| 69 | 720p | 64∶27 | 4∶3 |

| 70 | 720p100 | 64∶27 | 4∶3 |

| 71 | 720p120 | 64∶27 | 4∶3 |

| 72 | 1080p24 | 64∶27 | 4∶3 |

| 73 | 1080p25 | 64∶27 | 4∶3 |

| 74 | 1080p30 | 64∶27 | 4∶3 |

| 75 | 1080p50 | 64∶27 | 4∶3 |

| 76 | 1080p | 64∶27 | 4∶3 |

| 77 | 1080p100 | 64∶27 | 4∶3 |

| 78 | 1080p120 | 64∶27 | 4∶3 |

| 79 | 720p2x24 | 64∶27 | 64∶63 |

| 80 | 720p2x25 | 64∶27 | 64∶63 |

| 81 | 720p2x30 | 64∶27 | 64∶63 |

| 82 | 720p2x50 | 64∶27 | 64∶63 |

| 83 | 720p2x | 64∶27 | 64∶63 |

| 84 | 720p2x100 | 64∶27 | 64∶63 |

| 85 | 720p2x120 | 64∶27 | 64∶63 |

| 86 | 1080p2x24 | 64∶27 | 1∶1 |

| 87 | 1080p2x25 | 64∶27 | 1∶1 |

| 88 | 1080p2x30 | 64∶27 | 1∶1 |

| 89 | 1080p2x50 | 64∶27 | 1∶1 |

| 90 | 1080p2x | 64∶27 | 1∶1 |

| 91 | 1080p2x100 | 64∶27 | 1∶1 |

| 92 | 1080p2x120 | 64∶27 | 1∶1 |

| 93 | 2160p24 | 16∶9 | 1∶1 |

| 94 | 2160p25 | 16∶9 | 1∶1 |

| 95 | 2160p30 | 16∶9 | 1∶1 |

| 96 | 2160p50 | 16∶9 | 1∶1 |

| 97 | 2160p60 | 16∶9 | 1∶1 |

| 98 | 2160p24 | 256∶135 | 1∶1 |

| 99 | 2160p25 | 256∶135 | 1∶1 |

| 100 | 2160p30 | 256∶135 | 1∶1 |

| 101 | 2160p50 | 256∶135 | 1∶1 |

| 102 | 2160p | 256∶135 | 1∶1 |

| 103 | 2160p24 | 64∶27 | 4∶3 |

| 104 | 2160p25 | 64∶27 | 4∶3 |

| 105 | 2160p30 | 64∶27 | 4∶3 |

| 106 | 2160p50 | 64∶27 | 4∶3 |

| 107 | 2160p | 64∶27 | 4∶3 |

| 108 | 720p48 | 16∶9 | 1∶1 |

| 109 | 720p48 | 64∶27 | 4∶3 |

| 110 | 720p2x48 | 64∶27 | 64∶63 |

| 111 | 1080p48 | 16∶9 | 1∶1 |

| 112 | 1080p48 | 64∶27 | 4∶3 |

| 113 | 1080p2x48 | 64∶27 | 1∶1 |

| 114 | 2160p48 | 16∶9 | 1∶1 |

| 115 | 2160p48 | 256∶135 | 1∶1 |

| 116 | 2160p48 | 64∶27 | 4∶3 |

| 117 | 2160p100 | 16∶9 | 1∶1 |

| 118 | 2160p120 | 16∶9 | 1∶1 |

| 119 | 2160p100 | 64∶27 | 4∶3 |

| 120 | 2160p120 | 64∶27 | 4∶3 |

| 121 | 2160p2x24 | 64∶27 | 1∶1 |

| 122 | 2160p2x25 | 64∶27 | 1∶1 |

| 123 | 2160p2x30 | 64∶27 | 1∶1 |

| 124 | 2160p2x48 | 64∶27 | 1∶1 |

| 125 | 2160p2x50 | 64∶27 | 1∶1 |

| 126 | 2160p2x | 64∶27 | 1∶1 |

| 127 | 2160p2x100 | 64∶27 | 1∶1 |

| 129—192 | reserved, value range is used in SVD to… | | |

| 193 | 2160p2x120 | 64∶27 | 1∶1 |

| 194 | 4320p24 | 16∶9 | 1∶1 |

| 195 | 4320p25 | 16∶9 | 1∶1 |

| 196 | 4320p30 | 16∶9 | 1∶1 |

| 197 | 4320p48 | 16∶9 | 1∶1 |

| 198 | 4320p50 | 16∶9 | 1∶1 |

| 199 | 4320p | 16∶9 | 1∶1 |

| 200 | 4320p100 | 16∶9 | 1∶1 |

| 201 | 4320p120 | 16∶9 | 1∶1 |

| 202 | 4320p24 | 64∶27 | 4∶3 |

| 203 | 4320p25 | 64∶27 | 4∶3 |

| 204 | 4320p30 | 64∶27 | 4∶3 |

| 205 | 4320p48 | 64∶27 | 4∶3 |

| 206 | 4320p50 | 64∶27 | 4∶3 |

| 207 | 4320p | 64∶27 | 4∶3 |

| 208 | 4320p100 | 64∶27 | 4∶3 |

| 209 | 4320p120 | 64∶27 | 4∶3 |

| 210 | 4320p2x24 | 64∶27 | 1∶1 |

| 211 | 4320p2x25 | 64∶27 | 1∶1 |

| 212 | 4320p2x30 | 64∶27 | 1∶1 |

| 213 | 4320p2x48 | 64∶27 | 1∶1 |

| 214 | 4320p2x50 | 64∶27 | 1∶1 |

| 215 | 4320p2x | 64∶27 | 1∶1 |

| 216 | 4320p2x100 | 64∶27 | 1∶1 |

| 217 | 4320p2x120 | 64∶27 | 1∶1 |

| 218 | 2160p100 | 256∶135 | 1∶1 |

| 219 | 2160p120 | 256∶135 | 1∶1 |

| VIC | Clock | | | Active | | Total | | Field rate (Hz) |

|---|---|---|---|---|---|---|---|---|

| VIC | Pixel (MHz) | V (Hz) | H (kHz) | H | V | H | V | Field rate (Hz) |

| 1 | 25.175 | 59.94 | 31.469 | 640 | 480 | 800 | 525 | 60 |

| 2 | 27 | 59.94 | 31.469 | 720 | 480 | 858 | 525 | 60 |

| 3 | 27 | 59.94 | 31.469 | 720 | 480 | 858 | 525 | 60 |

| 4 | 74.25 | 60 | 45.0 | 1280 | 720 | 1650 | 750 | 60 |

| 5 | 74.25 | 60 | 33.75 | 1920 | 540 | 2200 | 562.5 | 60 |

| 6 | 27 | 59.94 | 15.734 | 1440 | 240 | 1716 | 262.5 | 60 |

| 7 | 27 | 59.94 | 15.734 | 1440 | 240 | 1716 | 262.5 | 60 |

| 8 | 27 | 59.826 | 15.734 | 1440 | 240 | 1716 | 262.5 | 60 |

| 9 | 27 | 59.826 | 15.734 | 1440 | 240 | 1716 | 262.5 | 60 |

| 10 | 54 | 59.94 | 15.734 | 2880 | 240 | 3432 | 262.5 | 60 |

| 11 | 54 | 59.94 | 15.734 | 2880 | 240 | 3432 | 262.5 | 60 |

| 12 | 54 | 60 | 15.734 | 2880 | 240 | 3432 | 262.5 | 60 |

| 13 | 54 | 60 | 15.734 | 2880 | 240 | 3432 | 262.5 | 60 |

| 14 | 54 | 59.94 | 31.469 | 1440 | 480 | 1716 | 525 | 60 |

| 15 | 54 | 59.94 | 31.469 | 1440 | 480 | 1716 | 525 | 60 |

| 16 | 148.5 | 60 | 67.5 | 1920 | 1080 | 2200 | 1125 | 60 |

| 17 | 27 | 50 | 31.25 | 720 | 576 | 864 | 625 | 50 |

| 18 | 27 | 50 | 31.25 | 720 | 576 | 864 | 625 | 50 |

| 19 | 74.25 | 50 | 37.5 | 1280 | 720 | 1980 | 750 | 50 |

| 20 | 74.25 | 50 | 28.125 | 1920 | 540 | 2640 | 562.5 | 50 |

| 21 | 27 | 50 | 15.625 | 1440 | 288 | 1728 | 312.5 | 50 |

| 22 | 27 | 50 | 15.625 | 1440 | 288 | 1728 | 312.5 | 50 |

| 23 | 27 | 50 | 15.625 | 1440 | 288 | 1728 | 313 | 50 |

| 24 | 27 | 50 | 15.625 | 1440 | 288 | 1728 | 313 | 50 |

| 25 | 54 | 50 | 15.625 | 2880 | 288 | 3456 | 312.5 | 50 |

| 26 | 54 | 50 | 15.625 | 2880 | 288 | 3456 | 312.5 | 50 |

| 27 | 54 | 50 | 15.625 | 2880 | 288 | 3456 | 313 | 50 |

| 28 | 54 | 50 | 15.625 | 2880 | 288 | 3456 | 313 | 50 |

| 29 | 54 | 50 | 31.25 | 1440 | 576 | 1728 | 625 | 50 |

| 30 | 54 | 50 | 31.25 | 1440 | 576 | 1728 | 625 | 50 |

| 31 | 148.5 | 50 | 56.25 | 1920 | 1080 | 2640 | 1125 | 50 |

| 32 | 74.25 | 23.98/24 | 27 | 1920 | 1080 | 2750 | 1125 | Low |

| 33 | 74.25 | 25 | 28.125 | 1920 | 1080 | 2640 | 1125 | Low |

| 34 | 74.25 | 29.97/30 | 33.75 | 1920 | 1080 | 2200 | 1125 | Low |

| 35 | 108 | 59.94 | 31.469 | 2880 | 240 | 3432 | 262.5 | 60 |

| 36 | 108 | 59.94 | 31.469 | 2880 | 240 | 3432 | 262.5 | 60 |

| 37 | 108 | 50 | 31.25 | 2880 | 576 | 3456 | 625 | 50 |

| 38 | 108 | 50 | 31.25 | 2880 | 576 | 3456 | 625 | 50 |

| 39 | 72 | 50 | 31.25 | 1920 | 540 | 2304 | 625 | 50 |

| 40 | 148.5 | 100 | 56.25 | 1920 | 540 | 2640 | 562.5 | 100 |

| 41 | 148.5 | 100 | 45.0 | 1280 | 720 | 1980 | 750 | 100 |

| 42 | 54 | 100 | 62.5 | 720 | 576 | 864 | 625 | 100 |

| 43 | 54 | 100 | 62.5 | 720 | 576 | 864 | 625 | 100 |

| 44 | 54 | 100 | 31.25 | 1440 | 576 | 1728 | 625 | 100 |

| 45 | 54 | 100 | 31.25 | 1440 | 576 | 1728 | 625 | 100 |

| 46 | 148.5 | 119.88/120 | 67.5 | 1920 | 540 | 2200 | 562.5 | 120 |

| 47 | 148.5 | 119.88/120 | 90.0 | 1280 | 720 | 1650 | 750 | 120 |

| 48 | 54 | 119.88/120 | 62.937 | 720 | 480 | 858 | 525 | 120 |

| 49 | 54 | 119.88/120 | 62.937 | 720 | 480 | 858 | 525 | 120 |

| 50 | 54 | 119.88/120 | 31.469 | 1440 | 480 | 1716 | 525 | 120 |

| 51 | 54 | 119.88/120 | 31.469 | 1440 | 480 | 1716 | 525 | 120 |

| 52 | 108 | 200 | 125.0 | 720 | 576 | 864 | 625 | 200 |

| 53 | 108 | 200 | 125.0 | 720 | 576 | 864 | 625 | 200 |

| 54 | 108 | 200 | 62.5 | 1440 | 288 | 1728 | 312.5 | 200 |

| 55 | 108 | 200 | 62.5 | 1440 | 288 | 1728 | 312.5 | 200 |

| 56 | 108 | 239.76 | 125.874 | 720 | 480 | 858 | 525 | 240 |

| 57 | 108 | 239.76 | 125.874 | 720 | 480 | 858 | 525 | 240 |

| 58 | 108 | 239.76 | 62.937 | 1440 | 240 | 1716 | 262.5 | 240 |

| 59 | 108 | 239.76 | 62.937 | 1440 | 240 | 1716 | 262.5 | 240 |

| 60 | 59.4 | 23.98/24 | 18.0 | 1280 | 720 | 3300 | 750 | Low |

| 61 | 74.25 | 25 | 18.75 | 1280 | 720 | 3960 | 750 | Low |

| 62 | 74.25 | 29.97/30 | 22.5 | 1280 | 720 | 3300 | 750 | Low |

| 63 | 297 | 119.88/120 | 135.0 | 1920 | 1080 | 2200 | 1125 | 120 |

| 64 | 297 | 100 | 112.5 | 1920 | 1080 | 2640 | 1125 | 100 |

| 65 | 59.4 | 23.98/24 | 18.0 | 1280 | 720 | 3300 | 750 | Low |

| 66 | 74.25 | 25 | 18.75 | 1280 | 720 | 3960 | 750 | Low |

| 67 | 74.25 | 29.97/30 | 22.5 | 1280 | 720 | 3300 | 750 | Low |

| 68 | 74.25 | 50 | 37.5 | 1280 | 720 | 1980 | 750 | 50 |

| 69 | 74.25 | 60 | 45.0 | 1280 | 720 | 1650 | 750 | 60 |

| 70 | 148.5 | 100 | 75.0 | 1280 | 720 | 1980 | 750 | 100 |

| 71 | 148.5 | 119.88/120 | 90.0 | 1280 | 720 | 1650 | 750 | 120 |

| 72 | 74.25 | 23.98/24 | 27 | 1920 | 1080 | 2750 | 1125 | Low |

| 73 | 74.25 | 25 | 28.125 | 1920 | 1080 | 2640 | 1125 | Low |

| 74 | 74.25 | 29.97/30 | 33.75 | 1920 | 1080 | 2200 | 1125 | Low |

| 75 | 148.5 | 50 | 56.25 | 1920 | 1080 | 2640 | 1125 | 50 |

| 76 | 148.5 | 60 | 67.5 | 1920 | 1080 | 2200 | 1125 | 60 |

| 77 | 297.0 | 100 | 112.5 | 1920 | 1080 | 2640 | 1125 | 100 |

| 78 | 297.0 | 119.88/120 | 135.0 | 1920 | 1080 | 2200 | 1125 | 120 |

| 79 | 59.4 | 23.98/24 | 18.0 | 1680 | 720 | 3300 | 750 | Low |

| 80 | 59.4 | 25 | 18.75 | 1680 | 720 | 3168 | 750 | Low |

| 81 | 59.4 | 29.97/30 | 22.5 | 1680 | 720 | 2640 | 750 | Low |

| 82 | 82.5 | 50 | 37.5 | 1680 | 720 | 2200 | 750 | 50 |

| 83 | 99 | 60 | 45.0 | 1680 | 720 | 2200 | 750 | 60 |

| 84 | 165 | 100 | 82.5 | 1680 | 720 | 2000 | 825 | 100 |

| 85 | 198 | 119.88/120 | 99.0 | 1680 | 720 | 2000 | 825 | 120 |

| 86 | 99 | 23.98/24 | 26.4 | 2560 | 1080 | 3750 | 1100 | Low |

| 87 | 90 | 25 | 28.125 | 2560 | 1080 | 3200 | 1125 | Low |

| 88 | 118.8 | 29.97/30 | 33.75 | 2560 | 1080 | 3520 | 1125 | Low |

| 89 | 185.625 | 50 | 56.25 | 2560 | 1080 | 3000 | 1125 | 50 |

| 90 | 198 | 60 | 66.0 | 2560 | 1080 | 3000 | 1100 | 60 |

| 91 | 371.25 | 100 | 125.0 | 2560 | 1080 | 2970 | 1250 | 100 |

| 92 | 495 | 119.88/120 | 150.0 | 2560 | 1080 | 3300 | 1250 | 120 |

| 93 | 297 | 23.98/24 | 54 | 3840 | 2160 | 5500 | 2250 | Low |

| 94 | 297 | 25 | 56.25 | 3840 | 2160 | 5280 | 2250 | Low |

| 95 | 297 | 29.97/30 | 67.5 | 3840 | 2160 | 4400 | 2250 | Low |

| 96 | 594 | 50 | 112.5 | 3840 | 2160 | 5280 | 2250 | 50 |

| 97 | 594 | 60 | 135.0 | 3840 | 2160 | 4400 | 2250 | 60 |

| 98 | 297 | 23.98/24 | 67.5 | 4096 | 2160 | 5500 | 2250 | Low |

| 99 | 297 | 25 | 112.5 | 4096 | 2160 | 5280 | 2250 | Low |

| 100 | 297 | 29.97/30 | 135.0 | 4096 | 2160 | 4400 | 2250 | Low |

| 101 | 594 | 50 | 112.5 | 4096 | 2160 | 5280 | 2250 | 50 |

| 102 | 594 | 60 | 135.0 | 4096 | 2160 | 4400 | 2250 | 60 |

| 103 | 297 | 23.98/24 | 67.5 | 3840 | 2160 | 5500 | 2250 | Low |

| 104 | 297 | 25 | 112.5 | 3840 | 2160 | 5280 | 2250 | Low |

| 105 | 297 | 29.97/30 | 135.0 | 3840 | 2160 | 4400 | 2250 | Low |

| 106 | 594 | 50 | 112.5 | 3840 | 2160 | 5280 | 2250 | 50 |

| 107 | 594 | 60 | 135.0 | 3840 | 2160 | 4400 | 2250 | 60 |

| 108 | 90 | 47.96/48 | 36.0 | 1280 | 720 | 2500 | 750 | Low |

| 109 | 90 | 47.96/48 | 36.0 | 1280 | 720 | 2500 | 750 | Low |

| 110 | 99 | 47.96/48 | 36.0 | 1680 | 720 | 2750 | 825 | Low |

| 111 | 148.5 | 47.96/48 | 54 | 1920 | 1080 | 2750 | 1125 | Low |

| 112 | 148.5 | 47.96/48 | 54 | 1920 | 1080 | 2750 | 1125 | Low |

| 113 | 198 | 47.96/48 | 52.8 | 2560 | 1080 | 3750 | 1100 | Low |

| 114 | 594 | 47.96/48 | 108 | 3840 | 2160 | 5500 | 2250 | Low |

| 115 | 594 | 47.96/48 | 108 | 4096 | 2160 | 5500 | 2250 | Low |

| 116 | 594 | 47.96/48 | 108 | 3840 | 2160 | 5500 | 2250 | Low |

| 117 | 1188 | 100 | 225.0 | 3840 | 2160 | 5280 | 2250 | 100 |

| 118 | 1188 | 119.88/120 | 270.0 | 3840 | 2160 | 4400 | 2250 | 120 |

| 119 | 1188 | 100 | 225.0 | 3840 | 2160 | 5280 | 2250 | 100 |

| 120 | 1188 | 119.88/120 | 270.0 | 3840 | 2160 | 4400 | 2250 | 120 |

| 121 | 396 | 23.98/24 | 52.8 | 5120 | 2160 | 7500 | 2200 | Low |

| 122 | 396 | 25 | 55.0 | 5120 | 2160 | 7200 | 2200 | Low |

| 123 | 396 | 29.97/30 | 66.0 | 5120 | 2160 | 6000 | 2200 | Low |

| 124 | 742.5 | 47.96/48 | 118.8 | 5120 | 2160 | 6250 | 2450 | Low |

| 125 | 742.5 | 50 | 112.5 | 5120 | 2160 | 6600 | 2250 | 50 |

| 126 | 742.5 | 60 | 135.0 | 5120 | 2160 | 5500 | 2250 | 60 |

| 127 | 1485 | 100 | 225.0 | 5120 | 2160 | 6600 | 2250 | 100 |

| 193 | 1485.0 | 119.88/120 | 270 | 5120 | 2160 | 5500 | 2250 | 120 |

| 194 | 1188.0 | 23.98/24 | 108 | 7680 | 4320 | 11000 | 4500 | Low |

| 195 | 1188.0 | 25 | 110 | 7680 | 4320 | 10800 | 4400 | Low |

| 196 | 1188.0 | 29.97/30 | 132 | 7680 | 4320 | 9000 | 4400 | Low |

| 197 | 2376.0 | 47.96/48 | 216 | 7680 | 4320 | 11000 | 4500 | Low |

| 198 | 2376.0 | 50 | 220 | 7680 | 4320 | 10800 | 4400 | 50 |

| 199 | 2376.0 | 60 | 264 | 7680 | 4320 | 9000 | 4400 | 60 |

| 200 | 4752.0 | 100 | 450 | 7680 | 4320 | 10560 | 4500 | 100 |

| 201 | 4752.0 | 119.88/120 | 540 | 7680 | 4320 | 8800 | 4500 | 120 |

| 202 | 1188.0 | 23.98/24 | 108 | 7680 | 4320 | 11000 | 4500 | Low |

| 203 | 1188.0 | 25 | 110 | 7680 | 4320 | 10800 | 4400 | Low |

| 204 | 1188.0 | 29.97/30 | 132 | 7680 | 4320 | 9000 | 4400 | Low |

| 205 | 2376.0 | 47.96/48 | 216 | 7680 | 4320 | 11000 | 4500 | Low |

| 206 | 2376.0 | 50 | 220 | 7680 | 4320 | 10800 | 4400 | 50 |

| 207 | 2376.0 | 60 | 264 | 7680 | 4320 | 9000 | 4400 | 60 |

| 208 | 4752.0 | 100 | 450 | 7680 | 4320 | 10560 | 4500 | 100 |

| 209 | 4752.0 | 119.88/120 | 540 | 7680 | 4320 | 8800 | 4500 | 120 |

| 210 | 1485.0 | 23.98/24 | 118.8 | 10240 | 4320 | 12500 | 4950 | Low |

| 211 | 1485.0 | 25 | 110 | 10240 | 4320 | 13500 | 4400 | Low |

| 212 | 1485.0 | 29.97/30 | 135 | 10240 | 4320 | 11000 | 4500 | Low |

| 213 | 2970.0 | 47.96/48 | 237.6 | 10240 | 4320 | 12500 | 4950 | Low |

| 214 | 2970.0 | 50 | 220 | 10240 | 4320 | 13500 | 4400 | 50 |

| 215 | 2970.0 | 60 | 270 | 10240 | 4320 | 11000 | 4400 | 60 |

| 216 | 5940.0 | 100 | 450 | 10240 | 4320 | 13200 | 4500 | 100 |

| 217 | 5940.0 | 119.88/120 | 540 | 10240 | 4320 | 11000 | 4500 | 120 |

| 218 | 1188.0 | 100 | 225 | 4096 | 2160 | 5280 | 2250 | 100 |

| 219 | 1188.0 | 119.88/120 | 270 | 4096 | 2160 | 4400 | 2250 | 120 |

Notes: Parentheses indicate instances where pixels are repeated to meet the minimum speed requirements of the interface. For example, in the 720x240p case, the pixels on each line are double-clocked. In the (2880)x480i case, the number of pixels on each line, and thus the number of times that they are repeated, is variable, and is sent to the DTV monitor by the source device.

Increased Hactive expressions include “2x” and “4x” indicate two and four times the reference resolution, respectively.

Video modes with vertical refresh frequency being a multiple of 6 Hz (i.e. 24, 30, 60, 120, and 240 Hz) are considered to be the same timing as equivalent NTSC modes where vertical refresh is adjusted by a factor of 1000/1001. As VESA DMT specifies 0.5% pixel clock tolerance, which 5 times more than the required change, pixel clocks can be adjusted to maintain NTSC compatibility; typically, 240p, 480p, and 480i modes are adjusted, while 576p, 576i and HDTV formats are not.

• The EIA/CEA-861 and 861-A standards included only numbers 1–7 and numbers 17–22 (only in -A) above (but not as short video descriptors which were introduced in EIA/CEA-861-B) and are considered primary video format timings.

• The EIA/CEA-861-B standard has the first 34 short video descriptors above. It is used by HDMI 1.0–1.2a.

• The EIA/CEA-861-C and -D standards have the first 59 short video descriptors above. EIA/CEA-861-D is used by HDMI 1.3–1.3c.

• The EIA/CEA-861-E standard has the first 64 short video descriptors above. It is used by HDMI 1.4–1.4b.

• The CTA-861-F standard has the first 107 short video descriptors above. It is used by HDMI 2.0–2.0b.

• The CTA-861-G standard has the full list of 154 (1–127, 193–219) short video descriptors above. It is used by HDMI 2.1.

The Audio Data Blocks contain one or more 3-byte Short Audio Descriptors (SADs). Each SAD details audio format, channel number, and bitrate/resolution capabilities of the display as follows:

| Byte | Description | |

|---|---|---|

| 0 | Data block header | |

| 1 | Format and number of channels: | |

| 1 | Bit 7 | Reserved, 0 |

| 1 | Bit 6–3 | Audio format code 0000 0: reserved 0001… |

| 1 | Bit 2–0 | Number of channels minus 1 000 1 channe… |

| 2 | Sampling frequencies (kHz) supported: | |

| 2 | Bit 7 | Reserved, 0 |

| 2 | Bit 6 | 192 |

| 2 | Bit 5 | 176 |

| 2 | Bit 4 | 96 |

| 2 | Bit 3 | 88 |

| 2 | Bit 2 | 48 |

| 2 | Bit 1 | 44.1 |

| 2 | Bit 0 | 32 |

| 3 | Bitrate / format dependent: | |

| 3 | For codec 1, LPCM: | |

| 3 | Bits 7–3 | Reserved |

| 3 | Bit 2 | 24-bit depth |

| 3 | Bit 1 | 20-bit depth |

| 3 | Bit 0 | 16-bit depth |

| 3 | For audio format codecs 2–8, the maximu… | |

| 3 | For audio format codecs 9–14, format de… | |

| 3 | For audio format codec 15 (Extension): | |

| 3 | Bit 7–3 | Audio format extended code 00000 0: res… |

| 3 | Bits 2–0 | format dependent value |

A Vendor Specific Data Block (if any) contains as its first three bytes the vendor's IEEE 24-bit registration number,cite-ref-24[24] least significant byte first. The remainder of the Vendor Specific Data Block is the "data payload", which can be anything the vendor considers worthy of inclusion in this EDID extension block. For example, IEEE registration number 00 0C 03 means this is a "HDMI Licensing, LLC" specific data block (contains HDMI 1.4 info), C4 5D D8 means this is a "HDMI Forum" specific data block (contains HDMI 2.0 info), 00 D0 46 means this is "DOLBY LABORATORIES, INC." (contains Dolby Vision info) and 90 84 8b is "HDR10+ Technologies, LLC" (contains HDR10+ info as part of HDMI 2.1 Amendment A1 standardcite-ref-25[25]). It starts with a two byte source physical address, least significant byte first. The source physical address provides the CEC physical address for upstream CEC devices. HDMI 1.3a specifies some requirements for the data payload.

| Byte | Description | |

|---|---|---|

| 0 | Data block header | |

| 1–3 | IEEE Registration Identifier (little en… | |

| 4–5 | Components of Source Physical Address | |

| 6 | (optional) 1 , supported; 0 , unsupport… | |

| 6 | Bit 7 | A function that needs info from ACP or… |

| 6 | Bit 6 | 16-bit-per-channel deep color (48-bit) |

| 6 | Bit 5 | 12-bit-per-channel deep color (36-bit) |

| 6 | Bit 4 | 10-bit-per-channel deep color (30-bit) |

| 6 | Bit 3 | 4∶4∶4 in deep color modes |

| 6 | Bit 2 | Reserved, 0 |

| 6 | Bit 1 | Reserved, 0 |

| 6 | Bit 0 | DVI Dual Link Operation |

| 7 | (optional) Maximum TMDS frequency. 0 ,… | |

| 8 | (optional) Latency fields indicators 1… | |

| 8 | Bit 7 | Latency fields |

| 8 | Bit 6 | Interlaced latency fields. Absent if la… |

| 8 | Bits 5–0 | Reserved, 0 |

| 9 | Video latency | optional; if indicated, value = 1 + ms/… |

| 10 | Audio latency (video delay for progress… | optional; if indicated, value = 1 + ms/… |

| 11 | Interlaced video latency | optional; if indicated, value = 1 + ms/… |

| 12 | Interlaced audio latency (video delay f… | optional; if indicated, value = 1 + ms/… |

| 13+ | Additional bytes may be present, but th… | |

If a Speaker Allocation Data Block is present, it will consist of three bytes. The first and second bytes contain information about which speakers (or speaker pairs) are present in the display device:

| Byte | Description | |

|---|---|---|

| 0 | Data block header | |

| 1 | 1 , present; 0 , absent: | |

| 1 | Bit 7 | Front left/right wide (FLw/FRw) |

| 1 | Bit 6 | Deprecated, was Rear left/right center… |

| 1 | Bit 5 | Front left/right center (FLc/FRc) |

| 1 | Bit 4 | Back center (BC) |

| 1 | Bit 3 | Back left/right (BL/BR) |

| 1 | Bit 2 | Front center (FC) |

| 1 | Bit 1 | Low-frequency effects (LFE) |

| 1 | Bit 0 | Front left/right (FL/FR) |

| 2 | | |

| 2 | Bit 7 | Deprecated, was Top side left/right (Tp… |

| 2 | Bit 6 | Deprecated, was Side left/right (SiL/Si… |

| 2 | Bit 5 | Deprecated, was Top back center (TpBC) |

| 2 | Bit 4 | Deprecated, was Low-frequency effects 2… |

| 2 | Bit 3 | Left surround/right surround (LS/RS) |

| 2 | Bit 2 | Top front center (TpFC) |

| 2 | Bit 1 | Top center (TpC) |

| 2 | Bit 0 | Top front left/right (TpFL/TpFR) |

| 3 | Bits 7-3 | Reserved, 0 |

| 3 | Bit 2 | Deprecated, was Bottom front left/right… |

| 3 | Bit 1 | Deprecated, was Bottom front center (Bt… |

| 3 | Bit 0 | Deprecated, was Top back left/right (Tp… |

Some speaker flags have been deprecated in the SADB, but are still available in the RCDB's SPM. These speakers could not be indicated with a CA value in the Audio InfoFrame, and can only be used with Delivery According to the Speaker Mask, which corresponds to the RCDB only.

The Room Configuration Data Block and Speaker Location Data Blocks describe the speaker setup using room coordinates.

| Byte | Description | |

|---|---|---|

| 0 | Data block header | |

| 0 | Bits 7-5 | 111 =7, block type tag |

| 0 | Bits 4-0 | Length of payload data that follows thi… |

| 1 | 13 = extended tag code | |

| 3 | Configuration | |

| 3 | Bit 7 | Display data is valid |

| 3 | Bit 6 | Speaker count is valid |

| 3 | Bit 5 | Speaker location descriptors (SLD) are… |

| 3 | Bits 4-0 | Speaker count (1-32) |

| 4 | Speaker presence mask 1 (SPM1): 1 , pre… | |

| 4 | Bit 7 | Front left/right wide (FLw/FRw) |

| 4 | Bit 6 | Deprecated, was Rear left/right center… |

| 4 | Bit 5 | Front left/right center (FLc/FRc) |

| 4 | Bit 4 | Back center (BC) |

| 4 | Bit 3 | Back left/right (BL/BR) |

| 4 | Bit 2 | Front center (FC) |

| 4 | Bit 1 | Low-frequency effects 1 (LFE1) |

| 4 | Bit 0 | Front left/right (FL/FR) |

| 5 | Speaker presence mask 2 (SPM2): 1 , pre… | |

| 5 | Bit 7 | Top side left/right (TpSiL/TpSiR) |

| 5 | Bit 6 | Side left/right (SiL/SiR) |

| 5 | Bit 5 | Top back center (TpBC) |

| 5 | Bit 4 | Low-frequency effects 2 (LFE2) |

| 5 | Bit 3 | Left/right surround (LS/RS) |

| 5 | Bit 2 | Top front center (TpFC) |

| 5 | Bit 1 | Top center (TpC) |

| 5 | Bit 0 | Top front left/right (TpFL/TpFR) |

| 6 | Speaker presence mask 3 (SPM3): 1 , pre… | |

| 6 | Bits 7-4 | Reserved, 0 |

| 6 | Bit 3 | Deprecated, was Top left/right surround… |

| 6 | Bit 2 | Bottom front left/right (BtFL/BtFR) |

| 6 | Bit 1 | Bottom front center (BtFC) |

| 6 | Bit 0 | Top back left/right (TpBL/TpBR) |

| 7-9 | Maximum distance from the primary liste… | |

| 10-13 | Distance from the primary listening pos… | |

cite-note-11. ↑ "High-Definition Multimedia Interface Specification Version 1.3a" (PDF). 10 November 2006. Archived from the original (PDF) on 5 March 2016. Retrieved 2017-04-01.

cite-note-22. ↑ "read-edid". Polypux.org. Archived from the original on 2010-12-11. Retrieved 2017-04-01.

cite-note-33. ↑ "Utilities | PowerStrip". EnTech Taiwan. 2012-03-25. Archived from the original on 2011-03-08. Retrieved 2017-04-01.

cite-note-44. ↑ "SwitchResX - The Most Versatile Tool For Controlling Screen Resolutions On Your Mac". Madrau.com. Archived from the original on 2009-02-08. Retrieved 2017-04-01.

cite-note-55. ↑ citerefharald-schweder2003Harald Schweder (2003-02-11). "DisplayConfigX". 3dexpress.de. Archived from the original on 2011-07-18. Retrieved 2017-04-01.

cite-note-66. ↑ "VESA Display Device Data Block (DDDB) Standard" (PDF). github.io. 25 September 2006. Archived (PDF) from the original on 2021-04-17.

cite-note-77. ↑ citerefbrezenski2009Brezenski (2009-08-07). "Custom Resolutions on Intel Graphics". Software.intel.com. Archived from the original on 2011-03-15. Retrieved 2009-11-04.

cite-note-e-edid-81. VESA E-EDID Standard, Release A, Revision 2. September 25, 2006 Archived November 11, 2020, at the Wayback Machine;

cite-note-e-edid13-92. VESA Enhanced EDID Standard (PDF), Video Electronics Standards Association, 2000-02-09, p. 32, archived (PDF) from the original on 2012-04-25, retrieved 2011-11-19

cite-note-1010. ↑ "CTA-861 – CTA's Most Popular Standard". Consumer Technology Association®. CTA. Archived from the original on 11 October 2022.

cite-note-1111. ↑ "A DTV Profile for Uncompressed High Speed Digital Interfaces (CTA-861-E)". Consumer Technology Association®. CTA. Retrieved 4 August 2023.

cite-note-1212. ↑ "A DTV Profile for Uncompressed High Speed Digital Interfaces (CTA-861-F)". Consumer Technology Association®. CTA. Retrieved 4 August 2023.

cite-note-1313. ↑ "A DTV Profile for Uncompressed High Speed Digital Interfaces (ANSI/CTA-861-H)". Consumer Technology Association®. CTA. Retrieved 4 August 2023.

cite-note-1414. ↑ "A DTV Profile for Uncompressed High Speed Digital Interfaces (ANSI/CTA-861-I)". Consumer Technology Association®. CTA. Retrieved 4 August 2023.

cite-note-1515. ↑ citerefpaul-ploumis2013Paul Ploumis (2013-07-16). "CEA publishes new high-speed CEA-861-F DTV Interface Standard". Scrapmonster.com. Archived from the original on 2017-04-15. Retrieved 2017-04-01.

cite-note-1616. ↑ "A DTV Profile for Uncompressed High Speed Digital Interfaces" (PDF). 29 November 2017. CTA-861-G. Archived from the original (PDF) on 2017-11-30. Retrieved 2017-11-30.

cite-note-1717. ↑ "CTA's Entire Library of Industry Standards Now Free to Everyone". www.cta.tech. Archived from the original on 29 July 2019. Retrieved 2 April 2020.

cite-note-1818. ↑ "News - "Confidential" HDMI Specifications Docs Hit With DMCA Takedown". TV ADDONS. Archived from the original on 18 September 2020. Retrieved 2 April 2020.

cite-note-1919. ↑ "A DTV Profile for Uncompressed High Speed Digital Interfaces (ANSI/CTA-861-I)". Consumer Technology Association®. Archived from the original on 29 March 2023. Retrieved 29 March 2023.

cite-note-2020. ↑ "A DTV Profile for Uncompressed High Speed Digital Interfaces (ANSI/CTA-861-H)". 27 May 2021. CTA-861-H. Archived from the original on 2021-06-21. Retrieved 2021-05-27.

cite-note-2121. ↑ "Improvements on Audio and Video Signaling (CTA-861.6)". 2022-03-14. CTA-861.6. Archived from the original on 2022-05-17. Retrieved 2022-06-24.

cite-note-2222. ↑ "OVT - Optimized Video Timing Generator - CTA". www.cta.tech. CTA. Retrieved 4 August 2023.

cite-note-2323. ↑ "Improvements to CTA-861-I (CTA-861.7)". Consumer Technology Association®. Retrieved 27 June 2024.

cite-note-2424. ↑ "Welcome to The Public Listing For IEEE Standards Registration Authority". IEEE. Archived from the original on 13 May 2020. Retrieved 1 April 2020.

cite-note-2525. ↑ "edid-decode.git - edid-decode main repository". git.linuxtv.org. Archived from the original on 1 August 2020. Retrieved 2 April 2020.

cite-note-263. see section 8.7 of HDMI 1.3a

• edid-decode utility

• edidreader.com – Web Based EDID Parser

• Edid Repository – EDID files repository

• Display Industry Standards Archive

• UEFI Forum PNP IDs