Method and apparatus for modifying electrical signals

Claim 2

Color control apparatus for a television signal comprising means for providing three color signals, a color signal corresponding to each of three primary colors which are used to represent a composite color represEntation, means for representing one of said three color signals along a first axis and another of said three color signals along a second axis, means for selecting a first signal along said first axis and processing said signal to obtain a first component signal, means for selecting a second signal along said second axis and processing the second axis signal to obtain a second component signal, means for modifying one of said signals corresponding to said primary colors with one combination of said first and second component signals and for modifying another of said signals corresponding to said primary colors with a second combination of said first and second component signals different than said one combination to modify the composite color representation in a predetermined manner.

Claim 3

Color control apparatus for a television receiver for receiving a television signal comprising means for providing three color signals, R-Y, G-Y, and B-Y, said color signals corresponding respectively to three primary colors which are used to represent a composite color representation, means for representing one of said three color signals along a first axis and another of said three color signals along and substantially orthogonally related to a second axis, means for clipping a predetermined portion of first signal along said first axis and weighting said signal to obtain at least one first color correction signal, means for selecting a second signal along said second axis and weighting the second axis signal to obtain at least one second color correction signal, means for modifying one of the color signals corresponding to said primary colors with one and not the other of said first and second correction signals and modifying another of said color signals with at least the other and not the one of said first and second co-rection signals, to modify the composite color representation in a predetermined manner.

Claim 4

Color control apparatus for a television receiver for receiving a television signal comprising means for providing three color signals, R-Y, G-Y, and B-Y, said color signals corresponding respectively to three primary colors which are used to represent a composite color representation, means for representing one of said three color signals along a first axis and another of said three color signals along and substantially orthogonally related to a second axis, means for clipping a predetermined portion of first signal along said first axis and weighting said signal to obtain at least one first color correction signal, means for selecting a second signal along said second axis and weighting the second axis signal to obtain at least one second color correction signal, means for modifying one of the color signals corresponding to said primary colors with one and not the other of said first and second correction signals and modifying another of said color signals with at least the other and not the one of said first and second co-rection signals, to modify the composite color representation in a predetermined manner.

Claim 5

Television receiver for receiving a television signal having chroma and luminance signals therein comprising means for receiving and demodulating the chroma portion of said television signal to obtain R-Y and B-Y signals means to clip the demodulated R-Y and B-Y signals to obtain a plus R-Y signal and a minus B-Y signal, means to proportion said plus R-Y signal and said minus B-Y signal, means to obtain a G-Y signal from said B-Y and R-Y signals, means to add said proportioned positive R-Y signal to the positive G-Y signal and to the negative of said B-Y signal to form a modified G-Y signal and a modified B-Y signal, means to add the proportioned minus B-Y signal to the negative of said G-Y signal and to the positive of said R-Y signal to form modified G-Y and modified R-Y signals, means to display said corrected G-Y, corrected B-Y, and corrected R-Y signals in said television receiver.

Claim 6

Television receiver for receiving a television signal having chroma and luminance signals therein comprising means for receiving and demodulating the chroma portion of said television signal to obtain R-Y and B-Y signals means to clip the demodulated R-Y and B-Y signals to obtain a plus R-Y signal and a minus B-Y signal, means to proportion said plus R-Y signal and said minus B-Y signal, means to obtain a G-Y signal from said B-Y and R-Y signals, means to add said proportioned positive R-Y signal to the positive G-Y signal and to the negative of said B-Y signal to form a modified G-Y signal and a modified B-Y signal, means to add the proportioned minus B-Y signal to the negative of said G-Y signal and to the positive of said R-Y signal to form modified G-Y and modified R-Y signals, means to display said corrected G-Y, corrected B-Y, and corrected R-Y signals in said television receiver.

Claim 7

Color control apparatus for television receiver for receiving a television signal comprising an R-Y demodulator for providing an R-Y signal from the received television signal, a B-Y demodulator for providing a B-Y signal from the received television signal, a first diode poled to clip the positive portion of said R-Y signal, a second diode poled to clip the negative portion of said B-Y signal, a B-Y output, an R-Y output, a G-Y output, coupled to said R-Y demodulator and said B-Y demodulator, weighting impedances and gain means being between said diodes and said outputs.

Claim 8

Color control apparatus for television receiver for receiving a television signal comprising an R-Y demodulator for providing an R-Y signal from the received television signal, a B-Y demodulator for providing a B-Y signal from the received television signal, a first diode poled to clip the positive portion of said R-Y signal, a second diode poled to clip the negative portion of said B-Y signal, a B-Y output, an R-Y output, a G-Y output, coupled to said R-Y demodulator and said B-Y demodulator, weighting impedances and gain means being between said diodes and said outputs.

Claim 9

The apparatus of claim 4 with a first weighting impedance being between said first diode and the B-Y output, a second weighting impedance being between said second diode and the R-Y output, a third weighting impedance being between said second diode and the G-Y output.

Claim 10

The apParatus of claim 5 with switch means being between said first diode and said first weighting impedance, said switch means being between said second diode and second and third weighting impedance.

Claim 11

The apparatus of claim 6 with said switch means having an off, intermediate, and full position, fourth impedance means, fifth impedance means, said switch in said off position disconnecting the circuit between said diodes and said outputs, said switch means in said intermediate position connecting said first diode to said first weighting means through said fourth impedance and connecting said second diode to said second and third weighting means through said fifth impedance means, said switch means in said full position connecting said first diode to said first weighting means, and connecting said second diode to said second and third weighting means.

Claim 12

The apparatus of claim 4 with gain means comprising, first amplifier means connected to amplify said R-Y signal prior to said clipping by said first diode, second amplifier means connected to amplify said B-Y signal prior to said clipping by said second diode, third amplifier means connected between the first diode and said first weighting means to amplify the signal from said first diode to a predetermined level, fourth amplifier means connected between the second diode and said second and third weighting means to amplify the signal from said second diode to a predetermined level.

Claim 13

Color control apparatus for a television signal comprising means for representing a color signal in a color television system, means for demodulating said signal along the R-Y axis and the B-Y axis, means for clipping a portion of each of said demodulated signals, means for weighting said clipped portions of said signals in a predetermined manner, means for combining said weighted clipped portions of said signals to the color signal to swing the color wheel vectors on either side of a given color wheel vector towards said given vector to thereby correct for variations of the given vector.

Claim 14

Color control apparatus for a television signal comprising means for representing a color signal in a color television system, means for demodulating said signal along the R-Y axis and the B-Y axis, means for clipping a portion of each of said demodulated signals, means for weighting said clipped portions of said signals in a predetermined manner, means for combining said weighted clipped portions of said signals to the color signal to swing the color wheel vectors on either side of a given color wheel vector towards said given vector to thereby correct for variations of the given vector.

Claim 15

Color control apparatus for a television signal comprising means for demodulating a color signal in a color television system along a plurality of axes to provide a plurality of demodulated signals, means for altering one of said demodulated signals according to the variations in the other demodulated signal, means for altering the other demodulated signal according to the variations in said one demodulated signal whereby color wheel vectors on either side of a given color wheel vector are moved towards the given vector to thereby correct for variations of the given vector.

Claim 16

Color control apparatus for a television signal comprising means for demodulating a color signal in a color television system along a plurality of axes to provide a plurality of demodulated signals, means for altering one of said demodulated signals according to the variations in the other demodulated signal, means for altering the other demodulated signal according to the variations in said one demodulated signal whereby color wheel vectors on either side of a given color wheel vector are moved towards the given vector to thereby correct for variations of the given vector.

Claim 17

Color control apparatus for a television signal comprising means for demodulating a color signal in a color television system to obtain R-Y and B-Y signals, means for clipping a portion of said R-Y and B-Y color signals to obtain a clipped signal having clipped portions of only said R-Y signal, and a clipped signal having clipped portions of only said B-Y signal, means for weighting these clipped portions in a predetermined manner, means for adding these clipped portions to predetermined color signals to correct color signals in a predetermined manner.

Claim 18

Color control apparatus for a television signal comprising means for demodulating a color signal in a color television system to obtain R-Y and B-Y signals, means for clipping a portion of said R-Y and B-Y color signals to obtain a clipped signal having clipped portions of only said R-Y signal, and a clipped signal having clipped portions of only said B-Y signal, means for weighting these clipped portions in a predetermined manner, means for adding these clipped portions to predetermined color signals to correct color signals in a predetermined manner.

Claim 19

Television receiver for receiving a television signal having chroma and luminance signals therein comprising means for receiving and demodulating the chroma signal portion in said television signal to obtain R-Y and B-Y signals, means to clip the demodulated R-Y and B-Y signals to obtain a plus R-Y signal and a minus B-Y signal, means to proportion said plus R-Y signal and said minus B-Y signal, means to obtain a G-Y signal from said R-Y and said B-Y signals, means to add the proportioned plus R-Y signal to the minus B-Y signal to obtain a modified B-Y signaL, means to add the proportioned minus B-Y signal to the negative of said G-Y signal and to said positive R-Y signal to form modified G-Y and modified R-Y signals, means to display said modified G-Y, B-Y, and modified R-Y signals on said television receiver.

Claim 20

Television receiver for receiving a television signal having chroma and luminance signals therein comprising means for receiving and demodulating the chroma signal portion in said television signal to obtain R-Y and B-Y signals, means to clip the demodulated R-Y and B-Y signals to obtain a plus R-Y signal and a minus B-Y signal, means to proportion said plus R-Y signal and said minus B-Y signal, means to obtain a G-Y signal from said R-Y and said B-Y signals, means to add the proportioned plus R-Y signal to the minus B-Y signal to obtain a modified B-Y signaL, means to add the proportioned minus B-Y signal to the negative of said G-Y signal and to said positive R-Y signal to form modified G-Y and modified R-Y signals, means to display said modified G-Y, B-Y, and modified R-Y signals on said television receiver.

Claim 21

Color control apparatus for a television signal comprising means for providing three color signals, a color signal corresponding to each of three primary colors which are used to represent a composite color representation, means for representing one of said three color signals as a first electrical quantity and another of said three color signals as a second electrical quantity, means for selecting a first portion of said first electrical quantity and processing said first portion to obtain a first component signal, means for selecting a second portion of said second electrical quantity and processing the second portion to obtain a second component signal, a means for modifying at least two of the color signals corresponding to said primary colors with at least one of said first and second portions with one of said color signals being modified by one and not the other of said component signals and another of said color signals being modified by the other and not the one component signal to modify the composite color representation in a predetermined manner.

Claim 22

Color control apparatus for a television signal comprising means for providing three color signals, a color signal corresponding to each of three primary colors which are used to represent a composite color representation, means for representing one of said three color signals as a first electrical quantity and another of said three color signals as a second electrical quantity, means for selecting a first portion of said first electrical quantity and processing said first portion to obtain a first component signal, means for selecting a second portion of said second electrical quantity and processing the second portion to obtain a second component signal, a means for modifying at least two of the color signals corresponding to said primary colors with at least one of said first and second portions with one of said color signals being modified by one and not the other of said component signals and another of said color signals being modified by the other and not the one component signal to modify the composite color representation in a predetermined manner.