HDMIPort

HDMI port, short for High-Definition Multimedia Interface port, is a 19-pin digital connector used to carry audio and video between consumer electronics such as televisions, computer displays, game consoles, and Blu-ray players. It is designed to transmit uncompressed video and audio over a single cable and supports additional features through optional data channels.

A key aspect of the HDMI system is its signaling standard, which uses TMDS (transition-minimized differential signaling) for video and audio data. HDMI also includes support for copy protection (HDCP), consumer electronics control (CEC), and, in newer versions, features such as audio return channel (ARC) and enhanced ARC (eARC), which simplify audio routing in home theater setups. The port enables various video resolutions and color formats, with capabilities expanding across versions to support higher bandwidth, HDR, wider color gamuts, and advanced gaming features.

There are several physical connector types. Type A is the standard full-size HDMI connector used on most TVs and receivers; Type C is the smaller Mini HDMI connector; Type D is the even smaller Micro HDMI connector. A Type E connector exists for automotive applications and includes a locking mechanism to withstand vehicle vibrations.

HDMI versions have evolved from modest bandwidth to high-capacity links. Earlier versions enabled 1080p video and stereo or multichannel audio, while HDMI 2.0 and 2.1 support higher resolutions and frame rates (including 4K and 8K), increased color depth, and features like VRR and dynamic HDR. Cable quality and device compatibility determine observed performance, with Ultra High Speed cables required for the highest bandwidth in newer specifications.