source:Industry Trends release time:2023-03-17 Hits: Popular:led screen wholesaler
1. AV input interface
The AV interface (also known as the RCA standard video input interface) is an interface that appears earlier. It consists of three colors of red, white, and yellow. Among them, the yellow line is the video transmission line, and the red and white sound transmission is responsible for the left and right channels. RAC lotus head is generally connected. The AV interface realizes the transmission of video and audio, which avoids the decline in image quality caused by two types of signal hybrid interference. However, because this type of interface transmission is a video signal of brightness/chroma (Y/C) mixed, it is necessary to further bright color separation and color decoding in order to imagine, which will inevitably cause losses of color signals, which ultimately affects the image quality of the output.
In short, the AV interface separates audio and video separation to avoid interference with each other. However, there are still transmission losses, so the current high -definition video playback basically abandon the AV interface.
2. VGA input interface
The VGA interface adopts a 15PIN connection method of asymmetric distribution. The working principle is to simulate the image signal stored in digital formats in a digital format in the Ramdac (digital model converter) into analog high -frequency signal, and then output to the LED screen imaging. Because VGA breaks down the video signal into R, G, B three primary colors and HV site signals, the loss in transmission is quite small. The VGA interface has the advantages of string disturbance and no circuit synthesis separation loss.
3. DVI input interface
The DVI interface is mainly used to connect to a computer with an independent graphics card to display the computer's RGB signal. The DVI digital interface uses the entire content to transmit all the content. There is no interference signal in the transmission process. It ensures the transmission quality of the host to the LED screen and can obtain a clearer image.
4. HDMI input interface
HDMI (High Definition Multimedia Interface) is based on DVI technology. It is a full digital image and sound transmission interface that can transmit audio and video signals without compressed. HDMI can provide 10Gbit/s data transmission bandwidth to meet the requirements of high -definition image quality. At the same time, the HDMI interface does not require digital -simulation -digital conversion, which can ensure high -quality audio -visual signal transmission. HDMI cables can transmit audio signals and can be used to avoid digital audio wiring.
In addition, in the input interface of the LED display, there are S-Video, video color difference input interface, BNC interface, RS-232C serial port, etc., because they are replaced by the high-definition interface, they are not introduced in length.
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