TH21078A - Television receivers with input couplings for Y-C format signals are isolated. - Google Patents

Abstract

A color TV receiver, including a comb filter circuit with luminance and chrominance outputs, is connected to the corresponding inputs of the display processor. The signal source prepares mixed and unmixed color image signals for display. The circuit acts as an on/off switch. A first practical method involves connecting the mixed image signal to the comb filter input for display by the display processor. A second practical method involves connecting the luminance component of the unmixed image signal to the comb filter input, and for the combined connection of the chrominance component of the unmixed image signal to the chrominance output of the comb filter, facilitating the display of the unmixed image signal by the display processor.

Claims (4)

1. Color TV receiver Which consists of A comb-type filter (10) with a luminance (Y) and chrominance (C) output connected to the corresponding inputs of the display processor (12). Signal source (22,30) for preparing mixed image input signal with combined luminance and chrominance components and for preparing image input signal. Non-mixed Containing luminance and chrominance are separated, which are characterized by Circuit paths (40,50,60) that provide the first practical method for connecting such composite video signals to such inputs. Of the comb filter circuit To show results by processing the said results And there is a second, practical method for connecting the aforementioned luminance components of a non-mixed video signal to the aforementioned inputs of the comb filter. And for the mutual connection of the aforementioned chrominant components of the non-mixed video signal to the lower chrominant output of the comb filter circuit. To display the results of a non-mixed video signal by the said processor. 2. The color TV receiver, as mentioned in claim 1, has a unique feature that the circuit trajectory consists of a switch (40) with the first input for receiving the composite input signal. Such It has a second input to receive the aforementioned luminance component of the input signal of the non-mixed image. And there is an output that is connected via an amplifier (50) to the said input terminal. (11) of the comb filter circuit (10) as above 3. The color TV receiver referred to in claim 1, which has a unique characteristic that such circuit paths consist of the first switch (40) and the second (60) switch. Such first (40) is for a selective connection of such mixed video signals. And the aforementioned luminance component of the non-mixed video signal to the aforementioned input of the aforementioned comb filter The second (60) of such a switch is for the selective welding of the aforementioned chrominant components of the non-mixed video signal to the said chrominant output. Such a comb filter circuit 4.Color TV receivers as discussed in claim 3, which have a unique feature at each switch, including their respective output amplifiers (50,60).