HDMI, high definition multimedia interface (High Definition Multimedia Interface) is a fully digitized image and voice transmission interface, which can transmit uncompressed audio and video signals. HDMI can be used in set-top boxes, DVD players, personal computers, TV amusement devices, integrated expansion machines, digital audio and TV sets. HDMI can transmit audio and audio signals at the same time. The same cable is used for audio and video signals, which greatly simplifies the installation of the system.