HDMI cable appearance and other products, it looks flat, but the actual body of the cable has its own universe.
Currently we use HDMI cable, the standard is 19-pin interface, that is, the internal 20 cores, 19 +1 (ground), so as to ensure that our signal transmission is guaranteed.
While some jerry-built cables, but only 13-core or 15-core, it is easy to appear flickering, snow, black screen, color is not saturated, poor sound quality and other phenomena.
For HDMI cable, there are four common wire gauge 22AWG, 24AWG, 26AWG, 28AWG, the larger the number of HDMI cable core the finer, the shorter the transmission distance.
So in general the higher the purity of the wire core, the thicker the diameter of the wire can reduce signal loss, shielding thick, dense can reduce interference, thick wire skin, can improve the strength of the wire, improve stability.
The material of the wire core is mainly divided into oxygen-free copper, recycled copper, copper-clad steel and copper-clad iron. In the production process, the choice of copper wire is also divided into tinned copper, bare copper wire, copper-clad steel, copper-clad aluminum and other classifications, in order of good and bad.
Of course, in addition to its own core factors, want to have a good display screen experience, the shielding layer should also be good.
In my own use of the Greenlink HD135 HD video cable, the core of the wire itself uses tinned copper core, with 4 layers of shielding protection, respectively, aluminum foil, tinned copper ground, aluminum foil and tinned copper braid.
Guaranteed Interface for Better Transmission
As the interface connecting the two ends of the device, the quality of the connector can also determine the transmission quality.
Good interface is generally gold-plated process, has a good conductivity and high temperature resistance, which not only ensures a faster transmission can also be used for a long time in the scene have a longer life.
In its own shell, the market is generally plastic, high-end a little is aluminum alloy and zinc alloy, perhaps this does not affect the actual transmission effect, but whether it is in the aesthetic or long insertion and removal under the service life, the latter are better than the former.
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