All About HDMI Cables - By: Chris Lees

What exactly are HDMI Cables? They are cables that work on the High Definition Multimedia Interface, its connector works on both audio and visual and its data is sent via digital streams that are uncompressed. This technology supports multiple varieties of television and PC based video all the way from standard to high definition. The NTSC and PAL formats are also compatible with this interface with capacities leading to 8 channels of 24-bit digital audio that comes in at around 192 kHz and is completely uncompressed. At this rate of data transfer this leads to huge possibilities for the interface and we have yet to see its full potential reached.

Amazingly, HDMI cables are able to support the transmission of digital a/v data while maintaining signal integrity via compression and decompression. Now, the next question is what are HDMI cables made of? Cables for the HDMI interface are comprised of twisted copper wires and the length of cables can reach a capacity of 15 meters (50 feet). HDMI technology doesn’t rely on using repeaters or amplifiers.

While there is no industry standard that specifically states a how long an HDMI cable should be, it is known that distances that are above the norm for length have a potential for weak signal transmission. If there are no preemptive measures to remedy this potential situation such as an error correction mechanism you are at risk of compromising your data transmission.

When attempting to send video and audio transmissions on the same channel, a process called Transition minimized differential signaling or TMDS is performed. Failsafes are initiated in this process to catch any data transmission errors. Other factors such as electromagnetic interference are also accounted for. This and other TMDS processes such as the monitoring of outside interference with signals make HDMI cables a true boon in a/v technology.

HDMI cables work in two different connections are single link (aka Type A or C) and dual link (Type B). These connections allow for a/v data transfers reaching a rate of 165 MHz. For single link connections you can expect a 25-340 MHz pixel rate while dual connections can reach up to 680 MHz.

The inception of HDMI dates back to 2003. Its recent upgrades and improvements have increased its status and dependability in the electronics marketplace. HDMI cables have proven to be very reliable and are for the most part an aggravation free setup. Its proficiency in a/v transmission that’s compression free are incentive enough for companies and consumers alike to support the technology. Many electronics and peripherals such as HD televisions, computers, video game systems, blue-ray players, camcorders and digital camera all rely on HDMI these days.

Now what does the future hold for the technology of HDMI cables? Well as know technology constantly changes and will always do so however HDMI is safe for now. HDMI has had a lot of support and backing that for the next few years it will more than likely continue to rule the technological roost.

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