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High-definition Multimedia Interface (English: High Definition Multimedia Interface, HDMI) is a kind of digital video/audio Interface technology, is a special digital Interface is suitable for video transmission, it can transmit audio and video signals at the same time, the highest of 2.25 GB/s data transmission speed.

HDMI can not only meet the resolution of 1080 p, also can support DVD Audio, and other digital Audio formats, supports 8-channel 96 KHZ or stereo digital Audio transmission 192 KHZ, can transmit compressed Audio signal and video signal. HDMI can be used in set-top boxes, DVD players, personal computers, TV game instruments, integrated extenders, digital audio and TV sets. HDMI can transmit audio and video signals simultaneously. HDMI EDID, DDC2B support, so it is of HDMI device has the characteristics of "plug and play", between signal and display device will automatically "consultation", automatically select the most appropriate video/audio formats. Compared with DVI, the HDMI interface is smaller and the cable length of HDMI/DVI is not more than 8 meters. With an HDMI cable, you can replace up to 13 analog transmission lines, which can effectively solve the problem of tangled connections between home entertainment systems.