HDMI (High-Definition Multimedia Interface) is a compact audio/video interface for transmitting uncompressed digital data. It represents a digital alternative to consumer analog standards, such as (RF) , , , , , , and . HDMI connects digital audio/video sourcessuch as , players, (PCs), (such as the and some models of ), and to compatible devices, , and .

HDMI supports, on a single cable, any or video format, including standard, enhanced, and ; up to 8 channels of digital audio; and a (CEC) connection. The CEC allows HDMI devices to control each other when necessary and allows the user to operate multiple devices with one handset. Because HDMI is electrically compatible with the signals used by (DVI), no signal conversion is necessary, nor is there a loss of video quality when a DVI-to-HDMI adapter is used. As an uncompressed connection, HDMI is independent of the various standards used by individual devices, such as and , as these are encapsulations of video streams (which can be decoded and output as an uncompressed video stream on HDMI).

HDMI products started shipping in the autumn of 2003. Over 850 and PC companies have adopted the HDMI specification (HDMI Adopters). In Europe, either DVI-HDCP or HDMI is included in the in-store labelling specification for TV sets for HDTV, formulated by with in 2005. HDMI began to appear on and in 2006. Shipments of HDMI were expected to exceed that of DVI in 2008, driven primarily by the consumer electronics market.