The half pin is placed at the 19 pin of the female head of hd cable (HDMI cable). When the hd cable (hdMI cable) is unplugged, the hot plug pin is disconnected first, and then after the circuit of the HD cable (HDMI cable) detects the disconnection, it notifies the input and output devices to stop working, which plays the role of hot plug.
You need an HDMI cable to transmit audio and video signals at the same time, and you don't need multiple wires to connect. At the same time, because there is no need for digital-to-analog or analog-to-digital conversion, higher audio and video transmission quality can be realized. For consumers, HDMI technology can not only provide clear picture quality, but also greatly simplify the installation of home theater system, because audio/video use the same cable. There are three kinds of hd line (HDMI cable) interfaces: A (standard), C (mini) and D (mini).
Type A (standard): width 14mm, suitable for HDTV, TV, set-top box, Blu-ray DVD and other devices. Type C (mini): width 10.5mm, suitable for MP4. Digital products such as cameras and tablet computers. D-type (miniature): 6mm wide, suitable for smartphones and tablets.
Hd line (HDMI cable) interface versions are 1.0, 1. 1 .2 (1.2a),1.3a,.