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HDMI vertion history
Aug 07, 2017

A product listed as having an HDMI version does not necessarily mean that it will have all of the features that are listed for that version,[87] since some HDMI features are optional, such as deep color and xvYCC (which is branded by Sony as "x.v.Color").[88][89] Note that with the release of the version 1.4 cable, the HDMI Licensing LLC group (which oversees the HDMI standard) will require that any reference to version numbers be removed from all packaging and advertising for the cable.[90] Non-cable HDMI products starting on January 1, 2012 will no longer be allowed to reference the HDMI number and will be required to state which features of the HDMI specification the product implements.[91]

Version 1.0Edit

HDMI 1.0 was released December 9, 2002 and is a single-cable digital audio/video connector interface with a maximum TMDS bandwidth of 4.95 Gbit/s. It defines up to 3.96 Gbit/s of video bandwidth (1080p/60 Hz or UXGA) and 8 channel LPCM/192 kHz/24-bit audio.[6](p. III)

Version 1.1Edit

HDMI 1.1 was released on May 20, 2004 and added DVD-Audio.[6](p. III)

Version 1.2Edit

HDMI 1.2 was released August 8, 2005 and added the option of One Bit Audio, used on Super Audio CDs, at up to 8 channels. It also added the availability of HDMI type A connectors for PC sources, the ability for PC sources to implement only the sRGB color space while retaining the option to implement the YCbCr color space, and required HDMI 1.2 and later displays to allow low-voltage sources.[6](p. III, §6.2.3)

HDMI 1.2a was released on December 14, 2005 and fully specifies Consumer Electronic Control (CEC) features, command sets and CEC compliance tests.[6](p. III)

Version 1.3Edit

HDMI 1.3 was released June 22, 2006 and increased the single-link bandwidth to 340 MHz (10.2 Gbit/s).[6](p. III)[38][92] It optionally allows deep color, with 30-bit, 36-bit and 48-bit xvYCCsRGB, or YCbCr, compared to 24-bit sRGB or YCbCr in previous HDMI versions. It also optionally allows output of Dolby TrueHD and DTS-HD Master Audio streams for external decoding by AV receivers.[93] It incorporates automatic audio syncing (audio video sync) capability.[38] It defined cable Categories 1 and 2, with Category 1 cable being tested up to 74.25 MHz and Category 2 being tested up to 340 MHz.[6](§4.2.6)It also added the new type C Mini connector for portable devices.[6](§4.1.1)[94]

HDMI 1.3a was released on November 10, 2006 and had Cable and Sink modifications for type C, source termination recommendations, and removed undershoot and maximum rise/fall time limits. It also changed CEC capacitance limits, clarified sRGB video quantization range, and CEC commands for timer control were brought back in an altered form, with audio control commands added. It also added the optional ability to stream SACD in its bitstream DST format rather than uncompressed raw DSD like from HDMI 1.2 onwards.[6](p. III)

HDMI 1.3b1.3b1 and 1.3c were released on March 26, 2007, November 9, 2007, and August 25, 2008 respectively. They do not introduce differences on HDMI features, functions, or performance,[95] but only describe testing for products based on the HDMI 1.3a specification regarding HDMI compliance (1.3b[57][96][97]), the HDMI type C Mini connector (1.3b1[57][96][97]) and active HDMI cables (1.3c[81][98]).[95]

Version 1.4Edit

HDMI 1.4 with audio return channel

HDMI 1.4 was released on May 28, 2009, and the first HDMI 1.4 products were available in the second half of 2009.[62][99] HDMI 1.4 increases the maximum resolution to 4K × 2K, i.e. 4096×2160 at 24 Hz (which is a resolution used with digital theaters) or 3840×2160 (Ultra HD) at 24 Hz/25 Hz/30 Hz; adds an HDMI Ethernet Channel (HEC), which allows for a 100 Mbit/s Ethernet connection between the two HDMI connected devices so they can share an Internet connection;[43] and introduces an audio return channel (ARC),[41] 3D Over HDMI, a new Micro HDMI Connector, expanded set of color spaces, with the addition of sYCC601, Adobe RGB and Adobe YCC601; and an Automotive Connection System.[62][100][101][102][103] HDMI 1.4 defines several stereoscopic 3D formats including field alternative (interlaced), frame packing (a full resolution top-bottom format), line alternative full, side-by-side half, side-by-side full, 2D + depth, and 2D + depth + graphics + graphics depth (WOWvx),[61][104][105] with additional top/bottom formats added in version 1.4a. HDMI 1.4 requires that 3D displays implement the frame packing 3D format at either 720p50 and 1080p24 or 720p60 and 1080p24.[105]High Speed HDMI 1.3 cables work with all HDMI 1.4 features except for the HDMI Ethernet Channel.[61][104][105]

HDMI 1.4a was released on March 4, 2010 and adds two additional mandatory 3D formats for broadcast content, which was deferred with HDMI 1.4 in order to see the direction of the 3D broadcast market.[106][107] HDMI 1.4a has defined mandatory 3D formats for broadcast, game, and movie content.[106] HDMI 1.4a requires that 3D displays implement the frame packing 3D format at either 720p50 and 1080p24 or 720p60 and 1080p24, side-by-side horizontal at either 1080i50 or 1080i60, and top-and-bottom at either 720p50 and 1080p24 or 720p60 and 1080p24.[107]

HDMI 1.4b was released on October 11, 2011.[108] One of the new features is that it adds the ability to carry 3D 1080p video at 120 Hz – allowing frame packing 3D format at 1080p60 per eye (120 Hz total).[109] All future versions of the HDMI specification will be made by the HDMI Forum that was created on October 25, 2011.[35][110]

Version 2.0Edit

HDMI 2.0, referred to by some manufacturers as HDMI UHD, was released on September 4, 2013.[111]

HDMI 2.0 increases the maximum TMDS per channel throughput from 3.4 Gbit/s to 6 Gbit/s which allows for a maximum total TMDS throughput of 18 Gbit/s.[111] This enables HDMI 2.0 to carry 4K video at 60 fps.[111][112][113] Other features of HDMI 2.0 include support of the Rec. 2020 color space, up to 32 audio channels, up to 1536 kHz audio sample frequency, dual video streams to multiple users on the same screen, up to four audio streams, 4:2:0 chroma subsampling, 25 fps 3D formats, 21:9 aspect ratio, dynamic synchronization of video and audio streams, the HE-AAC and DRA audio standards, improved 3D capability, and additional CEC functions.[111][114]

HDMI 2.0a was released on April 8, 2015 and added support for High Dynamic Range (HDR) video with static metadata.[115]

HDMI 2.0b was released March, 2016.[116] HDMI 2.0b initially supported the same HDR10 standard as HDMI 2.0a as specified in the CTA-861.3 specification.[114] In December 2016 additional support for HDR Video transport was added to HDMI 2.0b in the recently released CTA-861-G specification which extends the static metadata signaling to include Hybrid Log-Gamma (HLG).[114][117][118]

Version 2.1Edit

HDMI 2.1 was officially announced by HDMI Forum on January 4, 2017[79][119]. HDMI 2.1 added support for Dynamic HDR which is dynamic metadata that allows for changes on a scene-by-scene or frame-by-frame basis.[120] It will also support higher resolutions and higher refresh rates which includes 4K/120 Hz and 8K/120 Hz. HDMI 2.1 specified a new 48G cable which supports a bandwidth of 48 Gbit/s and it uses HDMI type A, C and D connectors.

Additional details for HDMI 2.1:[121]

  • Maximum resolution is 10K at 120 Hz

  • Dynamic HDR for specifying HDR metadata on a scene-by-scene or even a frame-by-frame basis

  • Display Stream Compression (DSC) 1.2 for video that is higher than 8K with 4:2:0 chroma sub-sampling

  • High Frame Rate (HFR) for 4K, 8K, and 10K which allows for refresh rates of up to 120 Hz

  • Game Mode VRR which allows for variable refresh rates (VRR) for more fluid motion in games

  • Enhanced Audio Return Channel (eARC) for object-based audio formats such as Dolby Atmos and DTS:X

For video resolutions and refresh rates up to and including 4K/60 Hz, the Dynamic HDR, Game Mode VRR and eARC features are supported with the existing HDMI cables. Higher resolutions and refresh rates than 4K/60 Hz, such as 4K/120 Hz and 8K/60 Hz, require new 48G cables.[119]

The increase in maximum bandwidth is achieved by raising the lane speed from 6 Gbit/s to 12 Gbit/s and increasing the number of AV data lanes from 3 to 4 (i.e. using all 4 lanes to carry data). The data lanes runs in inverted clock mode and embeds the clock signal in itself. This allows the clock lane to be used for data (in addition to the existing three data lanes). The lane data structure has been changed to a packet-based format. The lane encoding is changed from 8b/10b to 16b/18b (reducing the overhead from 20% to 11%).[122][123]

The doubling of lane rate and increasing of data lanes from 3 to 4, raises the effective bandwidth to 48 Gbit/s (i.e. 18 Gbit/s * 2 * 4/3). On using DSC, it has got a maximum compression of 3:1 and this effectively increases the bandwidth to 144 Gbit/s (i.e. 18 Gbit/s * 2 * 4/3 * 3). This much bandwidth can be used for sending up to 10K/60 Hz video in 4:4:4 format with 24-bit color (i.e. 4K/60Hz * 4 * 16/9). Using a different chroma sub-sampling format (4:2:2 or 4:2:0) enables to use even higher refresh rates (e.g. 10K/120 Hz in 4:2:0 format) or higher color depths (e.g. 30/36/48-bit).[121]

Version comparison

HDMI version1.01.11.2
1.2a
1.3
1.3a
1.3b
1.3b1
1.3c
1.4
1.4a
1.4b
2.0
2.0a
2.0b
2.1
Color space
SD: Rec. 601 (YCbCr)[129]YesYesYesYesYesYesYes
HD: Rec. 709 (sRGB)YesYesYesYesYesYesYes
xvYCCNoNoNoYesYesYesYes
sYCC601, Adobe RGB, and Adobe YCC601[61]NoNoNoNoYesYesYes
Rec. 2020[130]NoNoNoNoNoYesYes
Color codings
RGB 4:4:4YesYesYesYesYesYesYes
YCbCr 4:4:4/4:2:2YesYesYesYesYesYesYes
YCbCr 4:2:0 (4K signals and higher only)[130]NoNoNoNoNoYesYes

8-channel LPCM, 192 kHz, 24-bit audio capabilityYesYesYesYesYesYesYes
Blu-ray Disc and HD DVD video and audio at full HD resolution[a]YesYesYesYesYesYesYes
Consumer Electronic Control (CEC)[b]YesYesYesYesYesYesYes
DVD-AudioNoYesYesYesYesYesYes
Super Audio CD (DSD)[c]NoNoYesYesYesYesYes
Deep colorNoNoNoYesYesYesYes
Auto lip-syncNoNoNoYesYesYesYes
Dolby TrueHD / DTS-HD Master Audio bitstream capableNoNoNoYesYesYesYes
Updated list of CEC commands[d]NoNoNoYesYesYesYes
3D video[101]NoNoNoNoYesYesYes
Ethernet channelNoNoNoNoYesYesYes
Audio return channel (ARC)NoNoNoNoYesYesYes
32 channel audio[114]NoNoNoNoNoYesYes
1536 kHz total audio[114]NoNoNoNoNoYesYes
4 audio streams[114]NoNoNoNoNoYesYes
2 video streams (Dual View)[114]NoNoNoNoNoYesYes
21:9 aspect ratio[114]NoNoNoNoNoYesYes
Hybrid Log-Gamma (HLG) HDR OETF[114][117][118]NoNoNoNoNoYesYes
Static HDR (HDR static metadata)NoNoNoNoNoYesYes
Dynamic HDR (HDR dynamic metadata)NoNoNoNoNoNoYes
Enhanced audio return channel (eARC)NoNoNoNoNoNoYes
Variable refresh rate (Game Mode VRR)NoNoNoNoNoNoYes
4K resolution at 30 Hz[102]NoNoNoNoYesYesYes
4K resolution at 60 Hz[114]NoNoNoNoNoYesYes
4K resolution at 120 Hz[119]NoNoNoNoNoNoYes
8K resolution at 120Hz[119]NoNoNoNoNoNoYes
10K resolution at 120Hz[119]NoNoNoNoNoNoYes


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