HDMI

HDMI (High-Definition Multimedia Interface) is a proprietary audio/video interface for transmitting uncompressed video data and compressed or uncompressed digital audio data from an HDMI-compliant source device, such as a display controller, to a compatible computer monitorvideo projectordigital television, or digital audio device.[4] HDMI is a digital replacement for analog video standards.

HDMI implements the EIA/CEA-861 standards, which define video formats and waveforms, transport of compressed and uncompressed LPCM audio, auxiliary data, and implementations of the VESA EDID.[5][6](p. III)CEA-861 signals carried by HDMI are electrically compatible with the CEA-861 signals used by the digital visual interface (DVI). No signal conversion is necessary, nor is there a loss of video quality when a DVI-to-HDMI adapter is used.[6](§C) The CEC (Consumer Electronics Control) capability allows HDMI devices to control each other when necessary and allows the user to operate multiple devices with one handheld remote control device.[6](§6.3)

Several versions of HDMI have been developed and deployed since the initial release of the technology, but all use the same cable and connector. Other than improved audio and video capacity, performance, resolution and colour spaces, newer versions have optional advanced features such as 3DEthernet data connection, and CEC (Consumer Electronics Control) extensions.

Production of consumer HDMI products started in late 2003.[7] In Europe, either DVI-HDCP or HDMI is included in the HD ready in-store labelling specification for TV sets for HDTV, formulated by EICTA with SES Astra in 2005. HDMI began to appear on consumer HDTVs in 2004 and camcorders and digital still cameras in 2006.[8][9] As of January 6, 2015 (twelve years after the release of the first HDMI specification), over 4 billion

Specifications

HDMI (High-Definition Multimedia Interface)
 The HDMI logo with the acronym
Type Digital audio/video/data connector
Designer
Designed December 2002; 15 years ago
Manufacturer HDMI Adopters (over 1,700 companies)
Superseded DVIVGASCARTRGB Component
Width 13.9 mm (type A), 10.42 mm (type C), 6.4 mm (type D)
Height 4.45 mm (type A), 2.42 mm (type C), 2.8 mm (type D)
Hot-pluggable Yes
External Yes
Audio signal LPCMDolby DigitalDTSDVD-AudioDolby Digital PlusDolby TrueHDDTS-HD High Resolution AudioDTS-HD Master Audio, MPCM, DSDDSTDolby AtmosDTS:X
Video signal Maximum resolution limited by available bandwidth
Pins Types A, C, & D (19), Type B (29)
Data signal Yes
Bitrate Up to 48 Gbit/s in HDMI 2.1
Protocol TMDS
A diagram of a type A HDMI receptacle, showing 10 pins on the top row and 9 pins on the bottom row (total 19 pins).
HDMI type A receptacle (female)
Pin 1 TMDS Data2+
Pin 2 TMDS Data2 Shield
Pin 3 TMDS Data2−
Pin 4 TMDS Data1+
Pin 5 TMDS Data1 Shield
Pin 6 TMDS Data1−
Pin 7 TMDS Data0+
Pin 8 TMDS Data0 Shield
Pin 9 TMDS Data0−
Pin 10 TMDS Clock+
Pin 11 TMDS Clock Shield
Pin 12 TMDS Clock−
Pin 13 CEC
Pin 14
Pin 15 SCL (I²C serial clock for DDC)
Pin 16 SDA (I²C serial data for DDC)
Pin 17 Ground (for DDC, CEC, ARC, and HEC)
Pin 18 +5 V (min. 0.055 A)[3]
Pin 19
  • Hot Plug Detect (all versions)
  • HEAC− (HDMI 1.4+, optional, HDMI Ethernet Channel and Audio Return Channel)

HDMI (High-Definition Multimedia Interface) is a proprietary audio/video interface for transmitting uncompressed video data and compressed or uncompressed digital audio data from an HDMI-compliant source device, such as a display controller, to a compatible computer monitorvideo projectordigital television, or digital audio device.[4] HDMI is a digital replacement for analog video standards.

HDMI implements the EIA/CEA-861 standards, which define video formats and waveforms, transport of compressed and uncompressed LPCM audio, auxiliary data, and implementations of the VESA EDID.[5][6](p. III)CEA-861 signals carried by HDMI are electrically compatible with the CEA-861 signals used by the digital visual interface (DVI). No signal conversion is necessary, nor is there a loss of video quality when a DVI-to-HDMI adapter is used.[6](§C) The CEC (Consumer Electronics Control) capability allows HDMI devices to control each other when necessary and allows the user to operate multiple devices with one handheld remote control device.[6](§6.3)

Several versions of HDMI have been developed and deployed since the initial release of the technology, but all use the same cable and connector. Other than improved audio and video capacity, performance, resolution and colour spaces, newer versions have optional advanced features such as 3DEthernet data connection, and CEC (Consumer Electronics Control) extensions.

Production of consumer HDMI products started in late 2003.[7] In Europe, either DVI-HDCP or HDMI is included in the HD ready in-store labelling specification for TV sets for HDTV, formulated by EICTA with SES Astra in 2005. HDMI began to appear on consumer HDTVs in 2004 and camcorders and digital still cameras in 2006.[8][9] As of January 6, 2015 (twelve years after the release of the first HDMI specification), over 4 billion

Specifications

HDMI (High-Definition Multimedia Interface)
 The HDMI logo with the acronym
Type Digital audio/video/data connector
Designer
Designed December 2002; 15 years ago
Manufacturer HDMI Adopters (over 1,700 companies)
Superseded DVIVGASCARTRGB Component
Width 13.9 mm (type A), 10.42 mm (type C), 6.4 mm (type D)
Height 4.45 mm (type A), 2.42 mm (type C), 2.8 mm (type D)
Hot-pluggable Yes
External Yes
Audio signal LPCMDolby DigitalDTSDVD-AudioDolby Digital PlusDolby TrueHDDTS-HD High Resolution AudioDTS-HD Master Audio, MPCM, DSDDSTDolby AtmosDTS:X
Video signal Maximum resolution limited by available bandwidth
Pins Types A, C, & D (19), Type B (29)
Data signal Yes
Bitrate Up to 48 Gbit/s in HDMI 2.1
Protocol TMDS
A diagram of a type A HDMI receptacle, showing 10 pins on the top row and 9 pins on the bottom row (total 19 pins).
HDMI type A receptacle (female)
Pin 1 TMDS Data2+
Pin 2 TMDS Data2 Shield
Pin 3 TMDS Data2−
Pin 4 TMDS Data1+
Pin 5 TMDS Data1 Shield
Pin 6 TMDS Data1−
Pin 7 TMDS Data0+
Pin 8 TMDS Data0 Shield
Pin 9 TMDS Data0−
Pin 10 TMDS Clock+
Pin 11 TMDS Clock Shield
Pin 12 TMDS Clock−
Pin 13 CEC
Pin 14
Pin 15 SCL (I²C serial clock for DDC)
Pin 16 SDA (I²C serial data for DDC)
Pin 17 Ground (for DDC, CEC, ARC, and HEC)
Pin 18 +5 V (min. 0.055 A)[3]
Pin 19
  • Hot Plug Detect (all versions)
  • HEAC− (HDMI 1.4+, optional, HDMI Ethernet Channel and Audio Return Channel)