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Title: Καλώδιο RCA Post by: Megawatt on October 11, 2010, 14:29:03 pm The RCA connector is named for the Radio Corporation of America, which first used it in the 1940s to connect phonographs to amplifiers.
Generally it refers to a cable with three color-coded plugs, which connect to three correspondingly-colored jacks (these are also called 'phono plugs' and 'phono jacks,' short for phonograph). The colors are usually red and white for right and left audio channels and yellow for composite video. (Composite video is analog, or non-digital, and carries all the video data in one signal. Because analog video is made up of three separate signals to begin with, squeezing them into one signal reduces the quality somewhat.) (http://cache3.smarthome.com/images/8350v6.jpg) The cable can be used to connect a variety of audio and video devices, such as camcorders to TVs or stereos to speakers. Higher-end camcorders will have all three RCA jacks, and so the signal entering or leaving the camcorder can go through three separate channels (one video, two audio), resulting in a higher-quality transfer. Lower-end camcorders, however, usually only have one jack, called a stereo jack, which combines all three channels. This results in lower-quality transfers because the signal is compressed into one channel. In either case, RCA cables transmit analog, or non-digital, signals. Because of this, they cannot be plugged directly into a computer or other digital device. |