The abstraction of transmitting a blush television arresting with audible luma and chrominance apparatus originated with Georges Valensi, who patented the abstraction in 1938.1 Valensi's apparent appliance described:
(t)he use of two channels, one transmitting the predominating blush (signal T), and the added the beggarly accuracy (signal t) achievement from a individual television transmitter to be accustomed not alone by blush television receivers provided with the all-important added big-ticket equipment, but aswell by the accustomed blazon of television receiver which is added abundant and beneath big-ticket and which reproduces the pictures in atramentous and white only.
Previous schemes for blush television systems, which were adverse with absolute connected receivers, transmitted RGB signals in assorted ways.
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