- May 04, 2017 -
Although HDMI and DisplayPort seem to have the same functionality, as well as high-speed digital serial links, they are completely different structurally. Physical properties HDMI and DisplayPort are running on the same basis and differential coaxial twisted pair, using high speed and low voltage difference signal to transmit data, but the same point is only. Although the two scales are very similar in appearance, there is a huge difference in structure. These different resolutions have the performance of the link and its cost, compatibility, robustness, and ease of execution. The HDMI scale now defines four kinds of connectors, a to D. In addition to type B, the remainder is 19 stitches. Type C and D are for portable applications and small volume devices. The cables used in two scales are slightly different. HDMI1.0 to 1.3 uses 4 shielded coaxial differential pairs, 4 single-ended control signals, power supply (+ 5v) and ground wires. HDMI1.4 adds audio return channel and Ethernet channel, so the signal structure is different. The HDMI1.4 utilizes 4 coaxial pairs, 1 non-screened differential pairs, 3 single-ended signals, power supply (+ 5v), and ground wires. This means that HDMI1.4 and HDMI1.3 use a different cable. If a non-HDMI1.4 cable is used in the HDMI1.4 system, the audio return and Ethernet functions will be lost. However, all features of HDMI1.3 and other new features of HDMI1.4, such as 3d, can be retained.
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