HDMI Specifications

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HDMI Specification History

HDMI 1.0

• Released on December 9, 2002.
• HDMI 1.0 specified a single cable digital audio/video connector interface with a maximum TMDS bandwidth of 4.9 Gbit/s.
• HDMI 1.0 supports up to 3.96 Gbit/s of video bandwidth (1080p/60 Hz or UXGA) and 8 channel LPCM/192 kHz/24-bit audio.

HDMI 1.1:

• Released on May 20, 2004.
• Added support for DVD Audio.

HDMI 1.2:

• Released on August 8, 2005.
• Adds features and capabilities that increase HDMI's appeal for use in both the CE and PC industries.
  • Support for One Bit Audio format, such as SuperAudio CD's DSD (Direct Stream Digital).
  • Better support for current and future PCs with HDMI outputs, including: availability of the widely-used HDMI Type A connector for PC sources and displays with full support for PC video formats,
  • Added ability for PC sources to use their native RGB color space while retaining the option to support the YCbCr CE color space.
  • Required HDMI 1.2 and later displays to support future low-voltage (i.e., AC-coupled) sources, such as those based on PCI Express I/O technology.

HDMI 1.2a:

• Released on December 14, 2005.
• CEC: Added Consumer Electronic Control (CEC) features and command sets and CEC compliance tests are now fully specified.
• Creation of version 1.2a of the HDMI Compliance Test Specification (CTS), which includes a CEC Supplement. HDMI CTS 1.2a has been updated for technical consistency with HDMI Specification 1.2a as well as to the recently released HDMI Specification 1.2.

HDMI 1.3:

• Released on June 22, 2006.
• Increased the single-link bandwidth to 340 MHz (10.2 Gbit/s) to support future High Definition display devices with higher resolutions, Deep Color and high frame rates.
• HDMI 1.3 specification built in the technical foundation that will let future versions of HDMI reach significantly higher speeds.
• Deep Color: HDMI 1.3 supports 10-bit, 12-bit and 16-bit (RGB or YCbCr) color depths, up from the 8-bit depths in previous versions of the HDMI specification. Deep color is capable of rendering of over one billion colors in unprecedented detail.
• Broader color space: HDMI 1.3 adds support for “x.v.Color™” (which is the consumer name describing the IEC 61966-2-4 xvYCC color standard), which removes current color space limitations and enables the display of any color viewable by the human eye.
• New mini connector: With small portable devices such as HD camcorders and still cameras demanding seamless connectivity to HDTVs, HDMI 1.3 offers a new, smaller form factor connector option. This connector is called "Type C."
• Lip Sync: HDMI 1.3 incorporates automatic audio syncing (audio video sync) capability.
• New HD lossless audio formats such as Dolby TrueHD and DTS-HD: In addition to HDMI’s current ability to support high-bandwidth uncompressed digital audio and all currently-available compressed formats (such as Dolby® Digital and DTS®), HDMI 1.3 adds additional support for new lossless compressed digital audio formats Dolby TrueHD and DTS-HD Master Audio™.

HDMI 1.3a

• Released on November, 10 2006.

HDMI 1.3b, HDMI 1.3b1, and 1.3c (no differences on HDMI features, functions, or performance)

HDMI 1.3b

• Released on March 26, 2007.
• Describe testing for products based on the HDMI 1.3a specification regarding HDMI compliance.

HDMI 1.3b1

• Release on November 9, 2007.
• Introduced Type C mini connector.

HDMI 1.3c

• Released on August 25, 2008.
• Described testing for active HDMI cables.

HDMI 1.4:

• Released May 28, 2009.
• HDMI Ethernet Channel - The HDMI 1.4 specification adds a data channel to the HDMI connection, enabling high-speed, bi-directional communication. Connected devices that include this feature can send and receive data via 100 Mb/sec Ethernet, making them instantly ready for any IP-based application. The HDMI Ethernet Channel allows internet-enabled HDMI devices to share an internet connection via the HDMI link, with no need for a separate Ethernet cable. It also provides the connection platform that will allow HDMI-enabled components to share content between devices.
• Audio Return Channel - The new specification adds an audio channel that will reduce the number of cables required to deliver audio “upstream” from a TV to an A/V receiver for processing and playback. In cases where a TV features an internal content source, such as a built-in tuner or DVD player, the Audio Return Channel allows the TV to send audio data upstream to the A/V receiver via the HDMI cable, eliminating the need for an extra cable.
• 3D Over HDMI - The 1.4 version of the specification defines common 3D formats and resolutions for HDMI-enabled devices, enabling 3D gaming and other 3D video applications. The specification standardizes the input/output portion of the home 3D system, facilitating 3D resolutions up to dual-stream 1080p.
• 4K x 2K Resolution Support - The new specification enables HDMI devices to support extremely high HD resolutions, effectively four times the resolution of a 1080p device. Support for 4K x 2K allows the HDMI interface to transmit digital content at the same resolution as the state-of-the-art Digital Cinema systems used in many movie theaters.
• Expanded Support for Color Spaces - HDMI now supports color spaces designed specifically for digital still cameras, enabling more accurate color rendering when viewing digital photos. By supporting sYCC601, Adobe®RGB, and Adobe®YCC601, HDMI display devices are capable of displaying more accurate, life-like colors when connected to a digital camera.
• HDMI Micro Connector (Type D) - The HDMI Micro Connector is a significantly smaller 19-pin HDMI connector supporting up to 1080p resolutions for portable devices such as cell phones, portable media players, and digital cameras. This new connector is approximately 50% smaller than the size of the existing HDMI Mini connector.
• Automotive Connection System (Type E) - The Automotive Connection System is a cabling specification designed to be used for in-vehicle HD content distribution. The HDMI 1.4 specification provides a solution designed to meet the rigors and environmental issues commonly found in automobiles, such as heat, vibration and noise. Using the Automotive Connection System, car manufacturers now have a viable solution for HD distribution within a vehicle.

HDMI 2.0

• • 4K@50/60, (2160p), which is 4 times the clarity of 1080p/60 video resolution.
  • Up to 32 audio channels for a multi-dimensional immersive audio experience.
  • Up to 1536kHz audio sample frequency for the highest audio fidelity.
  • Simultaneous delivery of dual video streams to multiple users on the same screen.
  • Simultaneous delivery of multi-stream audio to multiple users (up to 4).
  • Support for the wide angle theatrical 21:9 video aspect ratio.
  • Dynamic synchronization of video and audio streams.
  • CEC extensions provides expanded command and control of consumer electronics devices through a single control point.

HDMI 2.1a

• •  Higher video resolutions support a range of high resolutions and faster refresh rates including 8K60Hz and 4K120Hz for immersive viewing and smooth fast-action detail.
  • Resolutions up to 10K are also supported for commercial AV, and industrial and specialty usages.
  • Dynamic HDR support ensures every moment of a video is displayed at its ideal values for depth, detail, brightness, contrast and wider color gamuts.
  • Source-Based Tone Mapping (SBTM) is a new HDR feature that allows a portion of the HDR mapping to be performed by the Source device instead of the Display device.
  • The Ultra High Speed HDMI Cable supports the 48G bandwidth for uncompressed HDMI 2.1a feature support. The cable also features very low EMI emission and is backwards compatible with earlier versions of the HDMI Specification and can be used with existing HDMI devices.
  • eARC simplifies connectivity, provides greater ease of use, and supports the most advanced audio formats and highest audio quality.
  • Enhanced gaming features ensure an added level of smooth and seamless motion and transitions for gaming, movies and video.
  • Variable Refresh Rate (VRR) reduces or eliminates lag, stutter and frame tearing for more fluid and better detailed gameplay.
  • Auto Low Latency Mode (ALLM) allows the ideal latency setting to automatically be set allowing for smooth, lag-free and uninterrupted viewing and interactivity.
  • Quick Frame Transport (QFT) reduces latency for smoother no-lag gaming, and real-time interactive virtual reality.
  • Quick Media Switching (QMS) for movies and video eliminates the delay that often occurs when a device changes from one HDMI frame rate to another.
  • HDMI Cable Power enables active HDMI Cables to be powered directly from the HDMI Connector, without attaching a separate power cable.

Connectors

• There are four HDMI connector types. Type A and Type B are defined in the HDMI 1.0 specification, Type C is defined in the HDMI 1.3 specification, and Type D is defined in the HDMI 1.4 specification.
  • Type A - This is the most common type of HDMI connector found in consumer electronics. It has nineteen pins, with bandwidth to support all SDTV, EDTV, and HDTV modes. The plug's outside dimensions are 13.9 mm × 4.45 mm. Type A is electrically compatible with single-link DVI-D.
  • Type B - This connector (21.2 mm × 4.45 mm) has 29 pins and can carry double the video bandwidth of Type A, for use with very high-resolution future displays such as WQUXGA (3840×2400). Type B is electrically compatible with dual-link DVI-D, but has not yet been used in any products.
  • Type C - A miniconnector, it is intended for portable devices. It is smaller than the Type A connector (10.42 mm × 2.42 mm) but has the same 19-pin configuration. While the number of pins is the same, the signal assignment is different because of the different shielding requirements, due to the signals' being in a single row. The Type C miniconnector can be connected to a Type A connector using a Type A-to-Type C cable.
  • Type D - A miniconnector defined in the HDMI 1.4 specification, it keeps the standard 19 pins of Types A and C but shrinks the connector size to something resembling a micro-USB connector. The Type D connector is 2.8 mm × 6.4 mm, whereas the Type C connector is 3.2 mm × 11.2 mm; for comparison, a micro-USB connector is 2.94 mm × 7.8 mm.

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