RCA is the abbreviation of Radio Corporation of American because the RCA connector was invented by this company. RCA is commonly known as the lotus socket, also known as the AV terminal, also known as the AV interface. Almost all TV and DVD products have this interface. It is not specifically designed for which interface, it can be used for both audio and ordinary video signals, and it is also a DVD component (YCrCb) socket, but the number is three. RCA is usually a pair of white audio interface and yellow video interface. It is usually connected by RCA (commonly known as lotus head). When using it, you only need to connect the standard AV cable with a lotus head to the corresponding interface.
