Chrominance equaliser in transmission channel of standard chrominance carrier - assigns signal adder to transmission channel with incoming chrominance carrier applied directly to first input and via delay circuit to second input

摘要

The equaliser is for a standard chrominance carrier transmitting modulated chrominance signals of a TV image. In the transmission channel (1) a signal adder (4) is fitted to whose first input (7) the incoming chrominance carrier (2) is applied. The second signal adder input (8) receives the incoming chrominance carrier via a delay member (10) whose delay time period (TV) equals the half time period of the oscillation direction, or to an uneven multiple integer of that oscillation duration half-period (T(FT)) of the chrominance carrier oscillation. The supply takes place via a signal inverter (9). USE/ADVANTAGE - TV transmission for reproduction, with interference equalisation not interfering with reproduction quality.