Hdmi Cables: The Future Of Multi-media Applications

High definition multimedia Interface or HDMI as it is known is an audio video interface

which transfers uncompressed digital streams over a single cable. The cables which are used to do this relay are HDMI cables. Available in two categories, category 1, tested at 74.5 MHz, known as standard and category 2 tested at 340 MHz and called high speed, these cables also fall in the two categories because of their specific lengths. Since both audio as well as video can be transferred over a single cable, it is also changing the face of the multi media and entertainment industry. A variant of this cable, the HDMI extension cable, supports standard HDMI video, enhanced HDMI video and high definition HDMI. Compatible with almost all digital display devices such as HDTVs, plasma displays, LCD TVs and projectors, these cables are referred to as the future of HDTV. Another variant is the DVI to HDMI cable.

If a user needs to convert video from a DVI source and present it on an HDMI monitor or display device and vice versa, they can make use of the DVI to HDMI cable. They perform the same action as the HDMI cable since they use the same encoding scheme. The only difference is that while HDMI uses a single connection to carry both digital video and audio, DVI can transfer only video. Equipped with either type of connectors, they are ideal for connecting DVD players, satellite set-top boxes and Blu-Ray players to Projectors, LCDs and Plasma HDTVs and HD displays. The cables used are known as the DVI to HDMI cables. These cables reduce EFI-EMI interference and provide crystal clear picture quality. Available in lengths ranging from 6 ft to 15 ft, they transmit HDTV at 2.2 Gbps. Supporting high resolutions of 24 bits/pixel; they are pin to pin compatible with DVI.

Since the DVI variants do not relay sound, they cannot be used for all multi- media applications. In such cases one can use the HDMI cable which delivers high frequency response and supports resolutions of 1080p using gold plated conductors. They also reduce cross talk and interference and isolate outside noise. Depending upon the distance between the source and display devices, HDMI cables with lengths ranging from 3ft to 75 ft can be used. Since more and more products supporting HDMI interface are being developed, these cables are gaining popularity.

by: Peter Pal Disuja

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