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High Definition Multimedia Interface or HDMI Comprised of Hitachi, Panasonic Corporation, Royal Philips Electronics, Silicon Image, Sony Corporation, Thomson and Toshiba Corporation, the High-Definition Multimedia Interface (HDMI) Founders have joined together to define a next-generation digital interface specification for consumer electronics products. HDMI is also supported by major motion picture producers, as well as satellite and cable companies.
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Common Versions
HDMI 1.3, 1.3a, 1.3b - There are no difference between these HDMI versions for consumers. These minor revisions to the specification typically relate to manufacturing or testing issues and do not impact features or functionality. In addition, all HDMI versions are fully backward compatible with all previous versions.
HDMI 1.4 - This is the newest HDMI standard and it's more powerful, with plenty of new capabilities pushing the boundaries of high definition experience.
Some HDMI cables do have specifications such as 24AWG and 28AWG. AWG is an acronym for American Wire Gauge and the number before it, is the thickness of the wires used. The higher the number the thinner the wire gets.
Please visit official site for more information.