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HDMI Q & A
Q. What is the difference between a “Standard” HDMI cable and a “High-Speed” HDMI
Recently, HDMI Licensing, LLC announced that cables would be tested as Standard or High-
˙Standard (or “category 1”) HDMI cables have been tested to perform at speeds of 75Mhz or
up to 2.25Gbps, which is the equivalent of a 720p/1080i signal.
˙High Speed (or “category 2”) HDMI cables have been tested to perform at speeds of 340Mhz
or up to 10.2Gbps, 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 from the Source. High-Speed cables are also able to accommodate
higher resolution displays, such as WQXGA cinema monitors (resolution of 2560 x 1600).
Q. How do I run HDMI cables longer than 10 meters?
There are many HDMI Adopters working on HDMI solutions that extend a cable’s effective
distance from the typical 10 meter range to much longer lengths. These companies
manufacture a variety of solutions that include active cables (active electronics built into
cables that boost and extend the cable’s signal), repeaters, amplifiers as well as CAT5/6 and
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.
For more detail information check http://www.hdmi.org/learningcenter/faq.aspx#49