What is the HDMI interface?

Friends who are doing weak currents or are usually in contact with more electrical appliances will often encounter difficult problems of various types of interfaces such as HDMI. They ca n’t understand and cannot understand. Today I will take a look at the relevant knowledge of the HDMI interface.

HDMI is a digital video / audio interface technology. It is a dedicated digital interface suitable for image transmission. It can transmit audio and video signals at the same time. The maximum data transmission speed is 18Gbps, and there is no need to perform digital / analog or analog / digital before signal transmission. Number conversion.

In popular terms, HDMI is a high-definition video interface, which is more common in mainstream notebooks, LCD TVs, graphics cards, and motherboards.

HDMI is a digital video / audio interface technology. It is a special digital interface suitable for image transmission. It can simultaneously transmit audio and video signals. The maximum data transmission speed is 5Gbps. It can support 1080P and 720P full HD format video output. The current popular high-definition interface is unmatched by ordinary VGA display interfaces. Just like the broadband and optical fiber of telephone lines in broadband, the data transmission capabilities are very different.

HDMI mainly meets the requirements for HD video above 1080P. For example, the motherboard or graphics card is equipped with an HDMI interface, indicating that the computer equipped with the motherboard or graphics card supports 1080P video output. We can connect a monitor or LCD TV that supports 1080P resolution to a computer to play 1080P Full HD video.

How to choose an HDMI cable The HDMI cables currently on the market range from a dozen yuan to a few thousand yuan. Below I will teach you in detail how to choose a suitable HDMI cable.

1. First of all, the thickness of the wire, it is recommended to buy a medium thickness, too thin wire basically do not need to consider. Because the wire is too thin, the shielding layer of the package and the core used in it must be "shrinked". During the transmission of video and audio signals, the interference is great, and the final picture quality is affected.

2. Simple and rough "coarse" and "fine" are not the only criteria for purchasing. The key to the product grade is actually not paying attention to the materials. The interface selects the gold-plated HDMI cable, and everyone can judge by the interface color. At present, the high-quality data cable interfaces on the market all adopt gold-plated processing, and the HDMI cable is no exception. The gold-plated interface can effectively reduce the phenomenon of signal interference and signal loss affecting the quality of the picture, and at the same time solve the problem of multiple insertion and removal and poor contact.

The material used to select all copper core HDMI cable can be judged by the softness of the wire. If the wire is hard and difficult to bend, it is basically not a full copper core. The all-copper wire core can support long-distance signal transmission without any problems such as signal attenuation. Of course, if you have high requirements for the wire and are willing to spend money, you can choose a fully silver-plated core.