[Source: Wiki,
webopedia, HDMI.org]
HDMI
(High-Definition Multimedia Interface) is a proprietary audio/video interface
for transferring uncompressed video data and compressed or uncompressed digital
audio data from an HDMI-compliant source device, such as a display controller,
to a compatible computer monitor, video projector, digital television, or
digital audio device. HDMI is a digital replacement for existing analog video
standards.
HDMI supports
standard, enhanced, or high-definition video, plus multi-channel digital audio
on a single cable. It transmits all ATSC HDTV standards and supports 8-channel
digital audio with bandwidth to spare to accommodate future enhancements and
requirements.
HDMI was
defined to carry 8 channels, of 192 kHz, 24-bit uncompressed audio, which
exceeds all current consumer media formats. In addition, HDMI can carry any
flavor of compressed audio format such as Dolby or DTS. HDMI has the capacity
to support existing high-definition video formats such as 720p, 1080i, and
1080p, along with support of enhanced definition formats like 480p, as well as
standard definition formats such as NTSC or PAL.
Here are the
major enhancements introduced in the HDMI 1.4 specification:
HDMI Ethernet Channel
Adds
high-speed networking to an HDMI link, allowing users to take full advantage of
their IP-enabled devices without a separate Ethernet cable.
Audio Return Channel
Allows an
HDMI-connected TV with a built-in tuner to send audio data "upstream"
to a surround audio system, eliminating the need for a separate audio cable.
3D
Defines
input/output protocols for major 3D video formats, paving the way for true 3D
gaming and 3D home theater applications.
4K Support
Enables video
resolutions far beyond 1080p, supporting next-generation displays that will
rival the Digital Cinema systems used in many commercial movie theatres.
Content Type
Real-time
signaling of content types between display and source devices, enabling a TV to
optimize picture settings based on content type.
Additional Color Spaces
Adds support
for additional color models used in digital photography and computer graphics.
HDMI Micro Connector
A new, smaller
connector for phones and other portable devices, supporting video resolutions
up to 1080p.
Automotive Connection System
New cables and
connectors for automotive video systems, designed to meet the unique demands of
the motoring environment while delivering true HD quality.
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