The High Definition Multimedia Interface (HDMI) is an audio / video interface for digital transmission of uncompressed flow figures. HDMI lets you connect an audio / video DRM – such as a Blu-ray or HD DVD, a computer or game console – with a compatible receiver – such as a HDTV.
HDMI supports any video format, including standard definition, enhanced and high definition sound and multi-channel, all on a single cable.
It is independent of the different standards of transmission of digital TV as the digital terrestrial TV or digital satellite TV.
HDMI video encapsulates by TMDS for data transmission. Initially, the maximum transmission rate was 165 Mpixel / s, sufficient to ensure the resolution of 1080p at 60 Hz or standard UXGA (1 600 × 1 200), but the HDMI 1.3 standard has increased the transmission up to 340 Mpixel / s.
HDMI enables the transmission of sound up to 8 channels uncompressed on a sample rate of 192 kHz with 24 bit / sample as well as support for compressed audio streams like DTS and Dolby Digital. These data are also encapsulated in the TMDS transmission standard. This has, moreover, the support of Super Audio CD (SACD) with rates of up to 4 times the rate of SACD. The HDMI 1.3 standard finally brings support for audio streams of high quality without loss of quality (lossless) – such as Dolby TrueHD and DTS-HD Master Audio.
The HDMI standard Type A has 19 pins, and a connector for a higher resolution called Type B connector has also been defined. The Type B connector has 29 pins him to withstand very high resolution screens to come. It is designed for resolutions above the WQSXGA (3 200 × 2 048).
Type A is backward compatible with the Single-link DVI (DVI-D, DVI-I but not DVI-A) which is widely used in computer monitors and graphics cards. This means that an issuer using the standard DVI-D can run a standard screen with an HDMI adapter-and vice versa, but the features in the transport of audio and remote control specific to HDMI will not be used. Moreover, without the support of HDCP transmitter and / or receiver, the user may not take advantage of content protected under optimal conditions. Type B is, similarly, backward compatible with the Dual-link DVI.
The founders of HDMI are composed of electronics manufacturers include Hitachi, Matsushita Electric Industrial (Panasonic / National / Quasar), Philips, Sony, Thomson (RCA), Toshiba, and Silicon Image. Digital Content Protection, LLC (a subsidiary of Intel) defines the specifications for HDMI HDCP. HDMI has the support of major production studios as Fox, Universal, Warner and Disney.
Brian O’Rourke (2008-01-28). “In-Stat Reports DVI on the Decline as HDMI and DisplayPort Grow”, reuters.
“HDMI FAQ”. HDMI.org.
“HDMI Adopters”, HDMI.org.