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(High-Definition Multimedia Interface) A digital interface for audio and video that provides a single-cable solution for home theater and consumer electronics equipment such as TVs, Blu-ray/DVD players and set-top boxes. Introduced in 2002, one HDMI cable took the place of nine different analog audio and video cables.

HDMI supports eight channels of 24-bit uncompressed audio at 192kHz and 4K video resolution up to 4096x2160 (as of HDMI 1.4). It also provides copy protection, A/V equipment control, 5 volts of power and compatibility with DVI and DisplayPort interfaces. For more HDMI details, look up the following:

Version summary, see HDMI versions.
Cable versions, see HDMI cable types.
A/V control, see HDMI CEC.
Compatibility, see HDMI-DVI compatibility and DisplayPort.
Audio return channel, see HDMI ARC.
Copy protection, see HDCP.

Common 19-Pin Connectors
Type A is for TVs and home theater equipment, while camcorders and cellphones use Type C and D. A more secure Type E is used in vehicles, and a 29-pin Type B supports dual-link DVI resolution (see DVI).

HDMI vs. All the Others
This earlier Roku streaming hub was on the market during the transition stage from analog to digital TV. See A/V ports.

An HDMI Switch
HDMI switches let several HDMI sources plug into a TV with only one HDMI input. This Oppo unit switches three inputs. See HDMI switch. (Image courtesy of Oppo Digital, Inc., www.oppodigital.com)
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References in periodicals archive ?
The HDMI cables include the HD-AC 01 (HDMI 2.0 A to A Cables), HD-AC 02 (HDMI 2.0 A to C Cables), HD-AC 03 (HDMI 1.4 A to A Cables), and HD-AC 04 (HDMI 1.4 A to D Cables).
In addition to the new waterproof HDMI cables, L-com has also released a new IP67-rated HDMI panel-mount coupler that can be used with the cable assemblies.
Prem Rodrigues, director of sales and marketing, Middle East, India and SAARC at Siemon, said: "With the development of our new adapter extender cable we have successfully managed to address common problems associated with the use of thicker HDMI cables and are now offering an improved, easier to handle pass-through connection for HD video displays."
has introduced a line of HDMI cable assemblies with connectors molded at 45[degrees] angles to allow for angled connectivity in tight spaces without damaging the cable or port.
High speed HDMI cables with ethernet have been tested to perform at speeds up to 10.2Gbps, the highest bandwith currently available, and can handle 1080p signals at increased color depths and refresh rates.
"Whether or not you have a control system installed, HD-EXT gives you a true uncompressed HD audio/video signal over a single wire, and spanning distances longer than a football field in length, whereas standard HDMI cables lose signal quality after just 30 feet.
Under the agreement the two companies will jointly develop, manufacture and market a range of ultra thin, high performance active HDMI cables to the portable gaming market under the Cheetah Cables brand.
"So we talk about the energy costs in the U.S., and we talk about the food costs in the U.S., but yet, flat screen LCD TVs are increasing dramatically in sales, and people are buying the HDMI cables at the same time they buy those televisions.
However with the current HDMI cables, 7 to 9cm of space may be needed behind the panel, between the wall, to connect the HDMI cable, causing limitations for easy installation," he says.
Consequently, HDMI cables require careful design and analysis techniques to ensure that they pass required compliance tests.