HDMI (High-Definition Multimedia Interface) is a multi-pin connector for digital video and audio devices. It replaces the analog SCART connector.
HDMI is not format-dependant and can work with all common digital formats.
HDMI 1.3 can transmit uncompressed video at 340Mpixels/second and 8-channel uncompressed digital audio at 192kHz sample rate with 24 bits/sample.
The standard HDMI connector is defined as "Type A" and contains 19 pins (shown in the diagram below). The "Type B" HDMI connector is not yet in production — it is reserved for future higher-resolution devices.
Type A HDMI Connector
|Pin||Signal Assignment||Pin||Signal Assignment|
|1||TMDS Data2+||2||TMDS Data2 Shield|
|3||TMDS Data2–||4||TMDS Data1+|
|5||TMDS Data1 Shield||6||TMDS Data1–|
|7||TMDS Data0+||8||TMDS Data0 Shield|
|9||TMDS Data0–||10||TMDS Clock+|
|11||TMDS Clock Shield||12||TMDS Clock–|
|13||CEC||14||Reserved (N.C. on device)|
|17||DDC/CEC Ground||18||+5 V Power|
|19||Hot Plug Detect|
HDMI was developed Hitachi, Matsushita (Panasonic), Philips, Silicon Image, Sony and Toshiba. It was officially released in 2002.