HDMI Info and FAQ
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HDMI stands for H
nterface. It allows video, audio, and data to pass through a single physical cable, and is currently the most prolific standard for consumer audio/video and computer monitor connectivity.
First announced in 2002, HDMI was intended to serve the fledgling HDTV market by providing a robust and expandable method of connecting a device to a display. It is one of the only mainstram connector formats to feature combined audio/video/data signals (also see: Thunderbolt
||Combined HD video and audio in one cable.
||Added support for DVD Audio.
||Added more PC support.
||Deep color, Mini Connector.
||4K support, 3D support, HDMI+Ethernet.
||4K at 60Hz, HDR support.
||10K video, 8K at 60Hz, 4K at 120Hz.
HDMI is currently the most prolific standard for consumer audio/video connectivity. It is intended to transfer uncompressed video and audio from a source device to an HDMI-compatible television, monitor, projector, or other display device. HDMI is also capable of carrying data in the form of Ethernet. Its most recent revision supports up to 10K video at 30Hz.
Yes! HDMI's signal is digital, making it resistant (but not immune) to analog interference and signal degradation.
Yes. By spec, HDMI carries 5V 55mA. However this is intended to be used for EDID polling (screen identification), and generally provides too little power for accessories. Most HDMI sources are capable of providing 5V 100-150mA, which is enough to power repeaters, switches, and other accessories. Additionally, HDMI in its USB Type-C alt mode is capable of supplying power from the source device via the USB-PD standard
. And MHL connections can feed power from a compatible display back to the source device.
Since 2009's release of HDMI 1.4, HDMI has technically supported 4K UHD resolution, but only at 30Hz. It wasn't until 2013 with the release of HDMI 2.0 that support was added for 4K/UHD at 60Hz, making it more useful for both computer monitors and gaming.
Although frequently adapted to HDMI, MHL actually uses a very different type of signal, and typically depends on either an active converter or MHL support in the display itself.
VGA is an older, analog format that can only carry a video signal. As such, it doesn't really compete with HDMI. Converting from VGA to HDMI is possible, as is converting from HDMI to VGA, though they involve very different operations.
DVI is an older video cabling standard that was primarily digital, but did have an optional analog component. HDMI has built-in backwards compatibility with DVI, and the two can be used interchangeably with only a passive converter at resolutions up to 1080p. At 4K/UHD resolution and higher, HDMI cannot be converted to DVI and vice versa. For more information about DVI, see our information page here.
DisplayPort is a current connectivity standard that complements and sometimes competes with HDMI. The two are roughly equal in performance and capability, with HDMI edging out DisplayPort as the more popular format. A DisplayPort output can be connected to an HDMI display via this adapter
, but not the other way around. For more information about DisplayPort, see our information page here.
Thunderbolt is a connectivity standard that complements and sometimes competes with HDMI. Thunderbolt is currently the more powerful and versatile format, but its cabling is more expensive, and compatible devices are less common. Thunderbolt can be adapted to HDMI, but not the other way around. For more information about Thunderbold, see our information page here.