In our work and life, we cannot do without the video cable. We need to connect the set-top box and the TV when watching TV, connect the host and the display when we work, and connect the laptop and the projector when casting the screen in a meeting. So choosing a good video cable is very important.

There are currently four common video interface types: VGA, HDMI, DVI, DP, so what is the difference between these four video cables? How should I choose?

1. DP
DP connector
DisplayPort is a high-definition digital display interface standard, which can be connected to computers and monitors, as well as computers and home theaters. As the successor to DVI, DisplayPort will add support for high-definition audio signal transmission while transmitting video signals, while supporting higher resolution and refresh rates. For data transmission, DisplayPort uses the "micro-packetised" format. At the same time, DisplayPort has a high degree of scalability, and more new content can be added in the future.
The DP interface can be understood as an enhanced version of HDMI, which is more powerful in audio and video transmission.
2. HDMI
HDMI
HDMI cable is the abbreviation of high-definition multimedia interface cable, which can transmit high-definition video and multi-channel audio data with high quality to ensure high-quality video and audio signal transmission.
Compared with the thicker VGA and DVI cables, the HDMI cable is convenient and high-definition. This allows it to be connected to the DVD player, receiver and PRR with one cable. In addition, HDMI devices have the "plug and play" feature, and the signal source and the display device will automatically "negotiate" to automatically select the most suitable video/audio format.
3. DVI
DVI connector
DVI interface is a technology for high-speed transmission of digital signals invented by the Digital Display Working Group (DDWG) established on the Intel Developer Forum in September 1998, including DVI-A and DVI-D And DVI-I three different types of interface forms. DVI-D has only digital interfaces, DVI-I has digital and analog interfaces, and the current application is mainly DVI-D (24+1).
DVI is a high-definition interface, but without audio, that is to say, the DVI video cable only transmits picture graphics signals, but not audio signals.
4. VGA
VGA connector
VGA (Video Graphics Array) is a video transmission standard introduced by IBM with PS/2 in 1987. It has the advantages of high resolution, fast display rate, and rich colors, and has been widely used in the field of color displays. Supports hot plugging and does not support audio transmission.

The performance ranking of these four monitor data lines: DP>HDMI>DVI>VGA. The most popular interface is VGA, but because VGA is an analog signal, it has been eliminated by the mainstream and gradually replaced by other interfaces. DVI, HDMI, and DP are all digital signals and are the current mainstream.




评论

发表评论

此博客中的热门博文

What is the coaxial connector?

图片
Coaxial connectors are used to transmit RF signals. They have a wide transmission frequency of up to 18 GHz or higher and are mainly used for radar, communication, data transmission and aerospace equipment. The basic structure of the coaxial connector includes: a center conductor (a positive or negative center contact); a dielectric material outside the inner conductor, or an insulator, and the outermost is an outer contact, which serves as a shield outside the coaxial cable. The same function of the layer, that is, the signal transmission, the grounding element as a shield or circuit. The coaxial connectors are mainly divided into: SMA, SMB, BNC, TNC, SMC, N-type, BMA, and the like. Male: Male (plug), thread inside, inside is the needle. Such as TNC (M). Female: Female (socket), threaded outside, inside is a hole. Such as SMA (F). RP: Reverse Polarity means that the head and the inside of the needle are opposite. Bulkhead: It is the joint of the lockable screw on the board and
阅读全文

Talking about the function, classification and working principle of OTG data line

图片
  What is the OTG line? OTG is mainly applied to the connection between various devices or mobile devices for data exchange. The development of USB technology enables computers and peripheral mobile devices to transmit various data through simple USB connections. This will lead to a situation, once the mobile phone or tablet does not have a computer, we cannot manage the data of mobile devices such as mobile phones, which brings inconvenience to users. As mobile devices such as mobile phones become more and more like computers, can we imagine that we can use mobile phones as computers? Can a U disk, USB network card, etc. be connected to the phone? The answer is yes, the OTG function is to realize that the mobile phone can be connected with USB devices such as U disk, but the mobile phone has a tiny   USB   interface, which cannot meet the needs of USB ports such as U disk. So far, the OTG data cable came into being. The role of OTG is to realize data transfer between mobile devices wi
阅读全文

The optical fiber connector

图片
A fiber optic connector is a detachable (active) connection between an optical fiber and an optical fiber. The two end faces of the optical fiber are precisely butted together so that the optical energy output from the transmitting optical fiber can be coupled to the receiving optical fiber to the maximum extent. It also minimizes the impact on the system due to its involvement in the optical link, which is a basic requirement for fiber optic connectors. To some extent, fiber optic connectors affect the reliability and performance of optical transmission systems. Basic introduction A connecting device for re-plugging between optical fibers, also called a fiber optic movable joint. The main performance parameters (and typical values) are: insertion loss (<0.5dB), plug-and-repeat repeatability and interchangeability between connectors (500 changes). When used in a large-capacity high-speed transmission system, reflection is also required to be small. Introduction Optical fiber con
阅读全文