In recent years, we have seen how developments on the means of
transmitting video and audio data from a player module, such as a DVD
player, to a viewing equipment which is your TV, improved our home
theater systems. From the old RF cables, to RCA, to S-Video cable, to
Component Video, and finally to the present HDMI cables, we have found
every upgrade beneficial to our viewing experience.
The new HDMI or High Definition Multimedia Interface format is able
to transmit large amounts of digital and audio data over one cable. The
technology was developed by Sony, Hitachi, Thomson (RCA), Philips,
Matsushita (Panasonic), Toshiba and Silicon Image. HDMI now is
considered as the standard for high definition TV and the consumer
electronics market in general.
If before, during the RF cable days, transmitting both audio and
video through one cable results to poor quality image and sound, recent
technological developments both in the field of hardware and file
compression have made HDMI capable of transmitting high-definition
video, multi-channel audio, and command data over a single cable.
Moreover, HDMI technology can transmit uncompressed digital video and
audio content. Its success in the digital world, in fact, has made
Hollywood studios and cable and satellite operators support HDMI.
The first HDMI was version 1.0 and came out in December 2002. This
version practically laid down the new foundation of one-wire
transmission of audio and video. Two years later on May 2004, HDMI
version 1.1 was released. It contained minor updates particularly
allowing content protection for DVD audio.
A year later, HDMI version 1.2 was released. This new version
released in August 2005 gives better versatility by allowing for One Bit
Audio support. One Bit Audio support is used for Super Audio CDs (SACD)
with allowance for up to eight channels of digital audio. An update,
HDMI 1.2a was released later on, which allowed HDMI devices to
communicate with each other.
The latest version is HDMI 1.3 which got approved in June 2006 had
already received an update, the 1.3a, November of last year even before
its full release. Another update, the HDMI 1.3b is said to be underway.
Regardless, the new HDMI 1.3 is now the standard in HDTV and other
products that utilize high definition formats.
What HDMI manufacturers did was increase the data-carrying bandwidth
and made 1.3 capable of handling from 165MHz to 340MHz. Because of the
increased in bandwidth, picture and sound quality is improved
dramatically. The device also improved the allowance for lossless audio
decoding by capable A/V receivers of Dolby TrueHD and DTS-HD codec data
streams.
However, some argues that HDMI 1.3 offers features that are not yet
available from source players like HD DVDs or Blu-rays. For example, 1.3
can transmit extended color ranges but present HD DVDs and Blu-rays are
not yet capable of producing such quality images. Critiques argue that
older versions of HDMI are more than enough to get the best of what
present Blu-ray or HD DVD has to offer and thus, there is no need to
worry about updating to 1.3, at the moment.
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