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Pinout of high definition multimedia interface hdmi type a type b connector and layout of 19 pin hdmi type a connectorthe high definition multi media is an industry supported digital audio video interface hdmi provides an interface between any compatible digital audio video source and a compatible digital audio and or video monitor. The main hdmi connector types include the type a which is used for most tvs type c which is a mini format a type d which is a micro format and the type e which is used for automotive applications and has a retainer and dirt protection hdmi type a connector pinout the type a hdmi connector is the most widely used. Inside an hdmi cable there are nineteen pins in an hdmi connector as seen in the following illustration pins 1 through 9 carry the three tmds data channels transition minimized differential signaling the technology that allows dvi and hdmi to send high speed digital data three pins per channel. Hdmi supports standard enhanced or high definition video as well as multichannel digital audio all carried over a single cable it is independent of the various digital tv standards such as atsc dvb t s c etc which are decoded and output as uncompressed video data which may or may not be high definition. Displayport is a digital display interface developed by the video electronics standards association vesa the interface is primarily used to connect a video source to a display device such as a computer monitor though it can also be used to transmit audio usb and other forms of data