Definition: | simultaneous line sequential colour television system using, in baseband, a composite colour signal comprising a luminance signal and two chrominance components each of which is transmitted sequentially, as frequency modulation of a separate subcarrier. The receiver is provided with a line period delay line to permit the simultaneous display of the three colour components
NOTE 1 – In most applications of SECAM, the scanning system uses 625 lines and 50 fields/second. The colour signal is transmitted using vestigial sideband amplitude modulation, and the sound is transmitted as amplitude or frequency modulation of a separate radio-frequency carrier.
NOTE 2 – SECAМ is derived from "Sequential Couleur à Мémоire".
NOTE 3 – There are different versions of SECAM defined in CCIR Report 624.
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