| HDMI | ||||||||||
| HDMI supports standard, enhanced, or high-definition video, plus multi-channel digital audio on a single cable. It is independent of the various DTV standards such as ATSC, DVB(-T,-S,-C), as these are encapsulations of the MPEG data streams, which are passed off to a decoder, and output as uncompressed video data, which can be high-definition. This video data is then encoded into TMDS for transmission digitally over HDMI. HDMI also includes support for 8-channel uncompressed digital audio. Beginning with version 1.2, HDMI now supports up to 8 channels of one-bit audio. One-bit audio is what is used on Super Audio CDs. | ||||||||||
| The standard Type A HDMI connector has 19 pins, and a higher resolution version called Type B, has been defined, although it is not yet in common use. Type B has 29 pins, allowing it to carry an expanded video channel for use with high-resolution displays. Type-B is designed to support resolutions higher than 1080p. | ||||||||||
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| TYPE A | ||||||||||
| Pin | Signal | Description | ||||||||
| 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 | control | ||||||||
| 14 | Reserved | N.C. on device | ||||||||
| 15 | SCL | DDC clock | ||||||||
| 16 | SDA | DDC data | ||||||||
| 17 | DDC/CEC Ground | |||||||||
| 18 | +5 V Power | power EDID/DDC | ||||||||
| 19 | Hot Plug Detect | |||||||||
| TYPE B | ||||||||||
| Pin | Signal | Description | ||||||||
| 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 | TMDS Data5+ | |||||||||
| 14 | TMDS Data5 Shield | |||||||||
| 15 | TMDS Data5- | |||||||||
| 16 | TMDS Data4+ | |||||||||
| 17 | TMDS Data4 Shield | |||||||||
| 18 | TMDS Data4- | |||||||||
| 19 | TMDS Data3+ | |||||||||
| 20 | TMDS Data3 Shield | |||||||||
| 21 | TMDS Data3- | |||||||||
| 22 | CEC | control | ||||||||
| 23 | Reserved | (N.C. on device) | ||||||||
| 24 | Reserved | (N.C. on device) | ||||||||
| 25 | SCL | DDC clock | ||||||||
| 26 | SDA | DDC data | ||||||||
| 27 | DDC/CEC Ground | |||||||||
| 28 | +5V | power EDID/DDC | ||||||||
| 29 | Hot Plug Detect | |||||||||