A) Standard developed by the International Radio Consultative Committee for the digitization of colour video signals. ITU-R BT.601 deals with the conversion from component RGB to YCbCr, the digital philtres used for limiting the bandwidth, the sample rate (defined as 13.5 MHz), and the horizontal resolution (720 active samples).

b) International standard for component digital television from which was derived SMPTE 125M (was RP-125) and EBU 3246E standards. CCIR defines the sampling systems, matrix values, and philtre characteristics for both Y, B-Y, R-Y and RGB component digital television.