RCA, commonly known as lotus socket, is ubiquitous in daily life. Almost all TV sets and DVD players have this interface. The number of RCA interfaces is usually three, and the operation is very simple, just need to connect the lotus head cable with the corresponding interface. Its application range is very wide, can be used in audio, and can be used in the ordinary video signal. So, what exactly is an rca interface? What are its advantages and disadvantages? What is the difference with AV interface? The following is a detailed introduction for you.
1.What is RCA interface?
RCA is by far the most common type of audio/video terminal. RCA is an acronym for Radio Corporation of American Radio. RCA is not specifically designed for any kind of interface. It can be used for both audio and regular video signals, and it is also a socket for the DVD component (YCrCb), though there are three of them.
The RCA plug was first invented by Radio Corporation of America to use red for the right channel (or the letter "R" for "right") and black or white for the left channel. Sometimes, the center and surround channel connections are color-coded to make them easier to distinguish, but all RCA connections throughout the system are electrically identical. Generally speaking, RCA stereo audio lines are left and right channels for a group, each channel appearance is a line. There are usually pairs of white audio ports and yellow video ports. It is usually connected using the RCA(commonly known as the Lotus head), and only needs to connect the standard AV cable with the lotus head to the corresponding interface.
2.Advantages and disadvantages of RCA interface
Interface advantages
The AV interface enables the separation of audio and video transmission, which avoids the degradation of image quality due to mixed audio/video interference. The most widely used interface on audio and video devices is provided on almost every audio and video device for audio and video input and output.
Interface defect
Since AV interface still transmits a mixed video signal of brightness/chrominance (Y/C), it still needs the display device to perform brightness/color separation and chrominance decoding before imaging. This process of mixing and then separation will inevitably lead to the loss of color signals, and chrominance signals and brightness signals will also have a great chance to interfere with each other, thus affecting the final output image quality. AV still has some life left in it, but the insuperable drawback of its Y/C mix makes it impossible to use it in situations where visual limits are being pushed.
3.Differences between RCA interfaces and AV interfaces
RCA terminal adopts the mode of coaxial signal transmission, the central axis is used to transmit signals, the outer ring of the contact layer is used to ground, can be used to transmit digital audio signals and analog video signals. RCA audio terminals are typically color-coded in pairs: red for the right channel (or the letter "R" for "right") and black or white for the left channel. Sometimes, the center and surround channel connections are color-coded to make them easier to distinguish, but all RCA connections throughout the system are electrically identical. Generally speaking, RCA stereo audio lines are left and right channels for a group, each channel appearance is a line. RCA interface connection mode: It is usually connected using RCA(commonly known as lotus head). When using, you only need to connect the standard AV cable with lotus head to the corresponding interface.
AV interface, also known as (RCARCA), refers to the current number of vehicle GPS devices, through their own sound and video terminals, connected to AV lines to output their own data, images and sounds to other display and audiovisual equipment, such as external displays or headphones, etc., mainly AV composite terminal, S-VIDEO terminal, headphone interface, etc. It can be regarded as an improved port of the TV, in terms of appearance is very different. There are three lines: audio interface (red and white lines, forming the left and right channels) and video interface (yellow). Since AV output is still a video signal that mixes luminance and chrominance, it still requires the display device to separate luminance and color and decode it in order to image. Such an approach will inevitably cause loss of picture quality, so the picture quality of AV interface is still not satisfactory. It is very simple to connect the AV cable of 3 colors to the interface of 3 colors on the TV side. In general, AV interface can realize the separation of audio and video transmission, in terms of imaging can avoid audio and video interference caused by the degradation of picture quality. AV interface is widely used in TV and DVD connection. It is one of the necessary interfaces for every TV.
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