HDMI is a fully digital interface used in the consumer electronics field and the PC field at the same time. It can transmit uncompressed audio and video signals. Because audio and video signals are transmitted by the same cable, the number of interface cables is greatly simplified, and it has been popularized in household appliances and PCs.
Since the emergence of the HDMI interface, there have been multiple versions of the evolution, from HDMI 1.1 to HDMI 1.4, although the appearance of the interface has not changed, but the function and bandwidth have been qualitatively improved.
The mainstream HDMI interface version is HDMI 1.3 (a, b, c), but with the popularity of 3D video, a large number of HDMI 1.4 version devices are also on the market, becoming the key promotion products of various companies. HDMI 1.4 brings several major innovations, including HDMI Ethernet channel, audio return channel, HDMI 3D video playback function and 4k×2k ultra-high resolution support.
