Many people buy laptops and find that there are a lot of interfaces next to them. There is a word on the top that says HDMI. Some people don't understand it very well. I don't know what it is for. In fact, it is an output port for high-definition video signals, connected to the display device through an HDMI high-definition cable. Compared to the VGA video signal output on our computer display, the picture is much better. In fact, the ordinary VGA signal is compressed, but the video and audio signals transmitted by the HDMI interface are uncompressed, and no digital-to-analog conversion is required, so the signal quality can be guaranteed.
Here is a brief introduction to the HDMI interface and high definition HDMI cable, to help everyone have a preliminary understanding
1. What is the HDMI interface
First, the number of pins from the interface can be divided into 19 pins and 29 pins. The current mainstream is 19 pins. From the version, the highest version is now 1.3, but the mainstream is 1.2. The HDMI interface on the display is connected to the graphics card. It can fully meet the mainstream 1080P HD resolution output of the current market.
In addition, it does not require a separate digital audio cable to transmit both video and audio signals. Therefore, with the development of the future, it will replace the signal interface of digital devices such as DVD players, TV sets, and set-top boxes.
In addition, compared to the current DVI digital interface, not only the resolution is improved, but also the volume is much smaller. It is also backward compatible with the DVI interface, of course you have to connect to the HDMI to DVI converter.
After reading the above description, I believe that many of you like to enjoy the high-definition cinema effect of the family, are you starting to be tempted
2, HDMI cable
HDMI HD cable is the bridge between the HDMI interface and the display device. Previously, the DVI interface also required separate connection of audio signals, so there are many complicated transmission lines to be connected, which is very different. Now just one HDMI cable can be completely fixed.
In terms of transmission distance, the HDMI interface can provide up to 5 Gbps of data transmission bandwidth. In addition, the DVI cable is about 8 meters, and the HDMI cable can transmit about 15 meters.
