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Home > How To > What is the AV input?
What is the AV input?

What is the AV input?

By  Karrie Madore 2020-01-04 2547 83

AV input uses AV interface for signal input. AV interface is an early interface, which is composed of red, white and yellow lines, in which the yellow line is the video transmission line, and red and white are responsible for the sound transmission between the left and right channels.

The earliest audio and video separation and transmission interface-AV interface

AV interface is a relatively early interface, it is composed of red, white and yellow lines, of which the yellow line is the video transmission line, and red and white are responsible for the sound transmission between the left and right channels. The emergence of

AV interface

AV interface separates video and audio transmission for the first time, but there is only one line responsible for video transmission, so this transmission mode first mixes luminance and chromaticity, and then decodes and displays it on the display device, so there is still some loss in video transmission quality. AV interface has been widely used in the connection between early VCD and DVD players and televisions. The

AV line  

AV line, also known as (RCA), refers to some vehicle-mounted GPS devices at present. Through its own audio and video terminals and connecting AV lines, its own data, image and sound are output to other display and audio-visual devices, such as external displays or headphones. The interfaces mainly include AV composite terminals, S-VIDEO terminals, headphone interfaces and so on. It can be regarded as an improved interface for TV, and the appearance is very different. It is divided into three lines, namely: audio interface (red and white lines, which make up the left and right sound channels) and video interface.

Since the AV output is still a video signal that mixes luminance and chromaticity, the display device still needs to separate luminance and color and decode it before imaging. This will inevitably cause loss to the picture quality, so the image quality of the AV interface is still not satisfactory. The connection is very simple, you only need to connect the AV lines of three colors to the interfaces of the three colors of the TV end.

Generally speaking, the AV interface separates the transmission of video and audio, thus avoiding the mutual interference between audio and video. However, because the luminance and chrominance still need to be decoded and displayed in video transmission, there is still a loss in video transmission, so the current high-definition video playback basically gives up the AV interface. /p>

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