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What is the HDMI interface? How to choose HDMI cable?

2021-03-03

What is the HDMI interface? How to choose HDMI cable?

 

Friends who are working with weak current or who have a lot of contact with electricity will often encounter difficult problems with various interfaces such as HDMI. They don't understand and cannot understand. Today, I will take you to take a look at HDMI interface related knowledge and tell you how to choose HDMI cable.

 

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

 

In layman's terms, HDMI is a high-definition video interface, which is more common in current 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 transmit audio and video signals at the same time. The maximum data transmission speed is 5Gbps. It can support 1080P, 720P full HD format video output. At present, the most popular high-definition interface, which is unmatched by ordinary VGA display interface, is like broadband telephone line broadband and optical fiber, and the data transmission capacity is very different.

 

HDMI mainly meets the needs of high-definition 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 the computer and play 1080P full HD. video.

 

[How to choose HDMI cable

At present, the HDMI cable on the market ranges from ten yuan to several thousand yuan. Below I will teach you how to choose a suitable HDMI cable in detail.

 

1. First of all, the thickness of the wire, it is recommended to buy a moderately thick wire. It is basically unnecessary to consider the wire that is too thin. Because the wire is too thin, the shielding layer of the package and the core used inside must be "shrinked". The video and audio signals are greatly interfered during the transmission process, and the final picture quality is affected.

 

2. Simple and crude "coarse" and "fine" are not the only criteria for purchasing. The key to product quality is actually the lack of attention to materials. The interface chooses the HDMI cable with gold-plated interface, everyone can judge by the color of the interface. At present, high-quality data line interfaces on the market are all processed with gold plating, and HDMI lines are no exception. The gold-plated interface can effectively reduce the phenomenon of signal interference and signal loss that affect the image quality, and solve the problem of multiple plugging and poor contact.

 

Choose the full copper core HDMI cable as the material, which 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 wire core. The all-copper core can support long-distance signal transmission without problems such as signal attenuation. Of course, if you have high requirements for wire and are willing to spend money, you can choose a fully silver-plated wire core.