What is HDMI? @ eCoustics.com
 

There have been four versions (plus several a and b variants) of HDMI-- but each one
uses the same 19-pin cable and plug! The latest HDMI standard is 1.3; the first was
HDMI 1.0. As the original standard evolved from HDMI 1.0 through 1.1, 1.2, and now
1.3, the cable and plug remained identical. The only things that changed were
increased capacity and versatility in some areas.

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