A luminance signal Y and two color difference signals (R-Y), (B-Y) are separated from a color video signal. A color difference time division multiplex (TDM) signal is produced from the two color difference signals by a time base compression and time base multiplexing. A burst signal is added on the luminance...http://www.google.de/patents/US4779143?utm_source=gb-gplus-sharePatent US4779143 - Video disc recording and/or reproducing apparatus for color video signal
