Extron Glossary of Terms
Digital AV

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ITU-R BT.601 - Formerly known as CCIR 601. A serial digital form of component video developed by the International Telecommunication Union for the digitization of color video signals. ITU-R BT.601 is the digital equivalent to Y, R-Y, B-Y, component analog video, and is transmitted on one coax cable instead of three. It is also called 4:2:2, which refers to the number of samples taken from each of the video channels: for every four samples of the Y (luminance) channel, the two color difference channels, R-Y and B-Y, are sampled twice.