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Old 09-12-2007, 06:19 PM   #1
treyw00 treyw00 is offline
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Aug 2007
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Default Can someone clarify an HDMI question

Just wondering if there's a way to tell which version HDMI cable I have. I have 3...one of which came with my cable box, but is there a way to look at the cable and tell which version it is?
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Old 09-12-2007, 06:25 PM   #2
Uxi Uxi is offline
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Cables are not version dependent, though you may see a "certification testing."

The only parts that should matter to you are:

Quote:
Originally Posted by hdmi.org
Q. How can I tell if a cable is an HDMI certified cable?

All HDMI products are required to be certified by the manufacturer as part of the HDMI Compliance Test Specification. However, there may be instances where cables bearing the HDMI logo are available but have not been properly tested. HDMI Licensing, LLC actively investigates these instances to ensure that the HDMI trademark is properly used in the market. We recommend that consumers buy their cables from a reputable source and a company that is trusted.

Q. What is the difference between a “Standard” HDMI cable and a “High-Speed” HDMI cable?

Recently, HDMI Licensing, LLC announced that cables would be tested as Standard or High-Speed cables.
Standard (or “category 1”) cables have been tested to perform at speeds of 75Mhz, which is the equivalent of a 1080i signal.
High-Speed (or “category 2”) cables have been tested to perform at speeds of 340Mhz, which is the highest bandwidth currently available over an HDMI cable and can successfully handle 1080p signals including those at increased color depths and/or increased refresh rates. High-Speed cables are also able to accommodate higher resolution displays, such as WQXGA cinema monitors (resolution of 2560 x 1600).

Q. Will my Standard cable work in high speed applications?

Although a Standard HDMI cable may not have been tested to support the higher bandwidth requirements of cables rated to support high speeds, existing cables, especially ones of shorter lengths (i.e., less than 2 meters), will generally perform adequately in higher speed situations. The quality of the HDMI receiver chip (in the TV, for example) has a large effect on the ability to cleanly recover and display the HDMI signal. A significant majority, perhaps all, of the HDMI TVs and projectors that support 1080p on the HDMI inputs are designed with quality receiver chips that may cleanly recover the 1080p HDMI signal using a Standard-rated HDMI cable. These receiver chips use technology called “cable equalization” in order to counter the signal reduction (attenuation) caused by a cable. We have seen successful demonstrations of 1080p signal runs on a >50 ft. cable, and a 720p signal run on a >75 ft. cable. However, the only way to guarantee that your cable will perform at higher speeds is to purchase a cable that has been tested at the higher speeds.
http://hdmi.org/learningcenter/faq.a...nectors_cables
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