mixed highs

mixed highs

[′mikst ′hīz]
(communications)
In color television, a method of reproducing very fine picture detail by transmitting high-frequency components as part of luminance signals for achromatic reproduction in color pictures.
References in periodicals archive ?
Nicky Richards' grey has mixed highs and lows this winter and the trainer reported the nine-year-old had broken a blood vessel after his Cheltenham flop.