What is HDMI?
HDMI stands for High Definition Multimedia Interface.
It is a compact 19-pin plug and cable for connecting High-Definition video and multi-channel
audio-capable as well as helping to speed the convergence of computer and consumer
AV products. High Definition technology or HD has seen a rapid increase in consumer
use especially with HDTVs, HD-DVD and Blu-ray players, HD camcorders and other HD
components. HDMI was developed by Hitachi, Panasonic, Sony, Toshiba, Philips, Thomson
and Silicon Image who came together in a conglomerate effort to simplify the task
of connecting and synchronizing available HD components for the user's benefit.
HDMI is an uncompressed, all-digital signal audio/video
interface with 5 Gbps of available bandwidth. It contains 19 wires wrapped in a
single cable that resembles a USB wire. The primary use of the HDMI wire is to transmit
digital signals from a compatible digital audio/video source such as a cable set
top box, DVD player, A/V receiver or satellite receiver to a compatible digital
audio and high definition television. HDTV uses less
than 1/2 of HDMI's available 5 Gbps bandwidth and thus HDMI has a lot of capacity
to spare. In addition to carrying uncompressed video, HDMI carry 8-channels, of
192kHz, 24-bit uncompressed audio. HDMI can also carry compressed audio formats
such as Dolby or DTS.
Benefits of HDMI over traditional analog
connections
>> HDMI transfers uncompressed
all-digital audio and video and eliminates losses associated with analog quality
meaning that the image quality will be of the highest degree. This is in fact its
primary benefit since it is able to transmit both audio and video in one cable.
It also prevents the losses caused by digital to analog conversions.
>> The low cost of the HDMI
is one of its biggest benefits. A HDMI connection replaces 3 video connections
for
HD video and 6 audio connections for high-resolution audio.
>> The spare capacity of the
HDMI can be used to incorporate new technology advancements.
>> HDMI supports uncompressed
video format and still provides the quality and functionality of an all-digital
interface while keeping costs low.
>> HDMI has the capacity to
support existing high-definition video formats (720p, 1080i, and even 1080p). It
also supports multiple audio formats such as stereo and multi channel surround sound.
It also has the flexibility to support enhanced definition formats such as 480p,
as well as standard definition formats such as NTSC or PAL.
>> HDMI provides increased capacity,
versatility it comes with an "Auto lip-sync" ability that enables an HDTV
that is HDMI 1.3-capable to automatically correct any out-of-sync video and audio
latency that may occur in some HDTV sets due to complex video processing.
>> HDMI eliminates the complexity
of using several multiple cables since it combines audio and video onto a single
cable.