The document discusses HDMI (High-Definition Multimedia Interface), which allows for the transmission of digital audiovisual content over a single cable. Key points: - HDMI is based on the DVI specification and is backwards compatible with DVI. It transfers video, audio, and auxiliary data across multiple channels. - HDMI uses TMDS (Transition Minimized Differential Signaling) encoding to transmit data across its channels at high speeds up to 3.4Gbps. A TMDS clock channel synchronizes the data channels. - HDMI supports configuration and status exchange between devices using DDC (Display Data Channel) and optional CEC (Consumer Electronics Control) for device control.