HDMI cables transmit the audio and video signals digitally. HDMI cables connect audio video machines that have an HDMI cable output to devices that have image display abilities with an HDMI input such as plasma TVs, LCD TVs.
You can use most HDMI cables as long as the cable you’re using has the capacity to properly transmit the signal. If it can’t, the picture will be corrupted.
Most HDMI cables are categorised by the specification they have been tested to, and the categories tend to fall under categories 1 and 2. HDMI 1.3 Cat 2 cables can support higher resolutions above 1080p, eg 1440p and 2160p. However, in the main, most customers do not need HDMI cables beyond 1.1 cable.
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HDMI 1.4 provides resolution to 4K × 2K (3840×2160p at 24 Hz/25 Hz/30 Hz and 4096×2160p at 24 Hz, which is means it is viable for use for digital theatres). 1.4 has an an HDMI Ethernet Channel (HEC), which means you can forge a 100 Mb/s Ethernet connection between two HDMI connected devices.
1.4 provides an Audio Return Channel, 3D Over HDMI, a Micro HDMI Connector, increased colour support, and an Automotive Connection System.
HDMI 1.4 supports a number of stereoscopic 3D formats including field alternative (interlaced), frame packing (a full resolution top-bottom format), line alternative full, side-by-side half, side-by-side full, 2D + depth, and 2D + depth + graphics + graphics depth (WOWvx), with additional top/bottom formats added in version 1.4a .
HDMI 1.4 needs 3D displays to support the frame packing 3D format at 720p50 and 1080p24 or 720p60 and 1080p24.
HDMI 1.4a furthers its predecessor cable with the ability to support two 3D formats for broadcast content.
HDMI 1.4a includes obligatory 3D formats for broadcast, game, and movie content.
HDMI 1.3 increased the single-link bandwidth to 340 MHz (10.2 Gbit/s).It has the ability to support Deep Color, with 30-bit, 36-bit, and 48-bit xvYCC, sRGB, or YCbCr, as opposed to 24-bit sRGB or YCbCr in earlier HDMI cables.
It has the ability to support Dolby TrueHD output as well as and DTS-HD Master Audio streams for external decoding by AV receivers.
Audio syncing capability is also possible. It can also support Type C Mini connectors for portable machines.
HDMI 1.3a was modified for Cable and Sink purposes, undershoot and maximum rise/fall time limits were removed. CEC capacitance limits were modified, along with clarified sRGB video quantization range, and CEC commands for timer control were reintroduced albeit slightly differently in that audio control commands were added. The ability to optionally support streaming SACD in its bitstream DST format rather than uncompressed raw DSD was also included.
HDMI 1.3b, 1.3b1 and 1.3c do not offer different HDMI abilities but refer to testing for compliance.
HDMI 1.0 is a single-cable digital audio/video connector interface with a maximum TMDS bandwidth of 4.9 Gbit/s. It supports up to 3.96 Gbit/s of video bandwidth (1080p/60 Hz or UXGA) and 8 channel LPCM/192 kHz/24-bit audio.
HDMI 1.1 provides further support for DVD-Audio.
HDMI 1.2 provides further support for One Bit Audio, used on Super Audio CDs, at up to 8 channels. It can support HDMI Type A connectors for PC sources.
HDMI 1.2a supports Consumer Electronic Control (CEC) features, command sets, and CEC compliance tests.
HDMI cables are built in particular way which means that they are only made up to certain lengths so that they work optimally. Category 1 cables (standard) provide resolutions like 720p60 and 1080i60. Category 2 (high speed) cables provide resolutions including1080p60 and 2160p3.
5 metre HDMI cables can be made for Category 1 specifications. Using higher quality materials, an HDMI cable can be as long as 15 metres.
The following categories group HDMI cables for different purposes:
* Standard HDMI Cable – up to 1080i and 720p
* Standard HDMI Cable with Ethernet
* High Speed HDMI Cable – 1080p, 4K, 3D and Deep Color
* High Speed HDMI Cable with Ethernet
HDMI devices are made to work with relevant specifications and are categorised using numbers – for example, 1.0, 1.2, or 1.3a.
Each progressive category needs more bandwidth and therefore requires a more sophisticated cable to be able to properly transmit.
The founders of HDMI are as follows:
Hitachi, Matsushita Electric Industrial, Philips, Silicon Image, Sony, Thomson, and Toshiba.
HDMI is supported by motion picture producers Fox, Universal, Warner Bros., and Disney.
HDMI began its task on April 16, 2002, to create an AV connector that was partly compatible with DVI. HDMI 1.0 was created to enhance existing DVI-HDTV technology by utilising a smaller connector by also being able to support audio, as well as further, namely, consumer electronics control functions.
The first Authorized Testing Center (ATC), which tests HDMI products, was Silicon Image created HDMI’s first testing centre on June 23, 2003 and was followed by Panasonic opening another centre on May 1, 2004. Europe followed behindon May 25, 2005.
In 2004, 5 million HDMI devices were sold followed by 17.4 million in 2005 and rising to 63 million in 2006. A whopping 143 million were sold in 2007 and HDMI is essentially the standard for HDTVs today.
PC Magazine awarded a Technical Excellence Award for the CEC part of HDMI in 2008 and it was heralded as the “innovation that has changed the world”. And ten companies were awarded Technology and Engineering Emmy by the National Academy of Television Arts and Sciences in 2009 for creating HDMI.
Digital Visual Interface (DVI) is a video interface standard. DVI supplies high visual quality to digital display devices. It’s inception is interesting in that it was developed by an industry consortium (the Digital Display Working Group (DDWG)). It’s arrival replaced the VGA connector standard.
It communicates a significant jump from analogue to digital and transmits uncompressed digital video data to digital display devices. It is partly compatible with the High-Definition Multimedia Interface (HDMI) standard, and VGA in analogue mode.
The DVI interface communicates the representation of pixels as binary data. At the time of reading, the digital display device will read the data and apply the different necessary brightness to each pixel. It’s superior to the analogue method in that each pixel is read and represented precisely, whereas via analogue the representation of each pixel can sometimes be affected by neighbouring pixels and electrical noise.
Digital Visual Interface (DVI) is a technology that supplies high visual quality across all digital devices including computer, HDTV, LCD and any unit that has a display screen.
The most usual DVI purpose is inter-connecting two monitors so you can use both as one computer.
If your laptop has an HDMI cable out-port can also connect the DVI cable a HDMI cable if your laptop has only a HDMI cable out port. You can also inter-connect your television set to your computer.
HDMI stands for High-Definition Multimedia Interface. This shares some qualities with DVI technology because it also transfers audio and video data between electronic units. HDMIs cables also connects such units to computers.
DVI is an acronym for Digital Visual Interface and supplies high quality visual data to digital devices like computers and LCDs – any unit with the ability to display images. The most common usage for DVIs is inter-connecting two computer monitors to use both simultaneously as one computer. If your laptop has just an HDMI out-port, you connect the DVI cable to an HDMI cable. You can also inter-connect your television set to your computer.
HDMI means High-Definition Multimedia Interface, a similar technology to DVI which also inter-connects electronic devices for the purpose of transferring audio and video data. This HDMI cable can also be used to connect any device with your laptop or computer.
So, what’s the difference?
Ultimately, an HDMI is superior because the technology used is more sophisticated, and it carries a few subtle features, such as Consumer Electronics Control. You can operate one-touch command, including one-toucghrecord and play, through numerous inter-linked audio and video devices.
It’s recommended that you keep HDMIs and DVIs away from power cords, at least 6 inches – to prevent signal strength becoming affected. Avoid letting them become tangled to protect the sensitive inner construction of the leads.
An HDMI cable (High-Definition Multimedia Interface cable) is a condensed audio/video interface which sends uncompressed digital data.
It is a digital alternative to analogue, for example radio frequency coaxial cable, composite video, S-Video, SCART, component video, D-Terminal, or VGA.
An HDMI cable connects digital audio/video source, including HD DVD players, Blu-ray Disc players, etc to relevant digital audio machines and computer monitors, projectors, etc.
On just one cable, HDMI is able to send up to 8 channels of compressed or uncompressed digital audio. HDMI is electrically relevant to Digital Visual Interface (DVI), conversion is unnecessary and there is no loss quality when a DVI-to-HDMI adapter is used.
HDMI products became popular in 2003 and over 850 consumer electronics and PC companies have taken up HDMI spec.