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<p> The above information introduces the product levels and functions of VGA, DVI, HDMI in detail, and explains the different characteristics of the product with specific technical parameters, allowing users to select the required products correctly. The data category is easy to understand, simple and practical, VGA It is the working principle of the monitor connected to the computer through the analog VGA interface. It is the display image information generated digitally in the computer. It is converted into R, G, and B primary color signals and line and field synchronization signals by the digital / analog converter in the graphics card. , The signal is transmitted to the display device through the cable. The corresponding A / D (analog / digital) converter needs to be configured in the display device to convert the analog signal into a digital signal. After D / A and A / D2 conversions, it inevitably caused some loss of image details. The DVI interface has various specifications, which are divided into DVI-A, DVI-D and DVI-I. It is based on Silicon Image ’s PanalLink interface technology and is based on TMDS (Transition Minimized Differential Signaling) electronic protocol. As a basic electrical connection. TMDS is a differential signal mechanism that can encode pixel data and pass it through a serial connection. The digital signal generated by the graphics card is encoded by the transmitter according to the TMDS protocol and sent to the receiver through the TMDS channel, and then sent to the digital display device after decoding. HDMI can not only meet the current highest resolution 1080P resolution, but also support the most advanced digital audio formats such as DVD Audio, support eight-channel 96kHz or stereo 192kHz digital audio transmission, and only use one HDMI cable to connect, eliminating digital audio wiring . At the same time, the extra space provided by the HDMI standard can be applied to future audio and video formats. Enough to deal with a 1080p video and an 8-channel audio signal. And because a 1080p video and an 8-channel audio signal require less than 4Gbps, HDMI still has a lot of headroom. It can be seen from the above that HDMI is the most perfect.