What is HDMI?

18/06/2021

HDMI: High Definition Multimedia Interface is a fully digital video and sound transmission interface that transmits uncompressed audio and video signals. HDMI cables can be connected to set-top boxes, DVD players, personal computers, video games, integrated amplifiers, digital audio and televisions.

HDMI Interface Definition:

 HDMI D Type (Micro HDMI).

  19pin, mainly used in small mobile devices such as cameras, drones, robots, etc. There are also special industrial phones with a standard HDMI plug on one end and a MicroHDMI (D type) on the other.

  HDMI C Type (mini-HDMI).

  19pin, a smaller version of HDMIA type, mainly used in portable devices such as DV, digital cameras, portable multimedia players, etc. The SONY HDR-DR5E DV is now available with this type of connector as a video output connector.

HDMI cable type

  Standard HDMI cable (supports up to 1080/60i)

  Standard Ethernet HDMI cable

  Standard Car HDMI Cable

  High-speed HDMI cable (supports 1080p, DeepColor, 3D)

  High-speed Ethernet HDMI cable

With the development of 5G technology, which uses the next generation of cellular technology, using microwave transmission, fast speed coverage, 5G download speed up to 10Gbps, the future application is to use the technology of light for the mainstream, optical transmission technology, the development of consumer electronics products to bring the best experience to consumers, with the fiber instead of copper this step of progress is becoming faster and more intensive, fiber optic connection cable in two to three years For example: if you only need a two or three meters long HDMI cable, then there is no need to choose fiber optic HDMI cable, traditional HDMI cable can be, if you need an HDMI cable more than 10 meters, then the fiber optic HDMI cable is your first choice, but this long distance of fiber optic HDMI cable needs to be protected when using, do not fold significantly Use, decoration pre-buried also need to be particularly careful, the bend needs to be a certain degree of curvature, not ninety degrees vertical fold, etc., but because the HDMI Association for the study of optical fiber cable is relatively small, so the current market of the AOC series HDMI cable is mixed.

How Optical HDMI works

  Optical HDMI requires two processes if it is to be output to the end of the display device: electrical-->optical, optical-->electrical

Electricity ---> light, light ---> electricity; one light to electricity, one electricity to light; the one on the right is a tricolour lamp, the one on the left is a white lamp for lighting; the one on the right has an additional black device, which should be the microprocessor, the brain of the whole line, photoelectric conversion plus microprocessor control, the whole package is particularly small.

Let's take a look at the internal structure of the fiber optic HDMI cable, a total of four layers, the innermost layer of four fiber optic cores, it is worth mentioning that when stripped of the fiber optic sheath, a little force will break the fiber optic core, however, in the four-layer structure of the fiber optic HDMI cable can well protect the fiber optic core to prevent the fiber optic core crushed, pulled off, etc.; which four optical fibers, very thin; the remaining tinned copper wire is the power and electrical control signals, the optical fiber is used to transmit data.