Color television receiver

Claim 2

A color television decoding system for a receiver adapted to receive a composite color television signal comprising color synchronizing burst signals, luminance signal components, and first and second chrominance signal components amplitude modulated on a common sub-carrier and having quadrature phase modulation axes, the color phase sequence of the first and second chrominance signal components being periodically reversed by periodic reversal of the phase of the modulation axis for one of the chrominance signal components, said decoding system comprising: A. Delay means for delaying said chrominance components a predetermined length of time; B. First switching means for transmitting segments of said chrominance components for selected intervals of time, each equal to said predetermined length of time, whereby said delay means and said switching means cooperate to produce a continuous selected chrominance signal; C. First and second demodulator means to demodulate said continuous selected chrominance signal; D. First and second generator means to generate first and second reference sub-carrier signals, respectively; E. Control means connected to said generator means; and F. Second switching means for selectively connecting said burst signals to said control means to control the phase of said subcarrier signals.

Claim 3

an input terminal connected to said output terminal of said first switching means, and

Claim 4

an input terminal connected to said output terminal of said first switching means, and

Claim 5

a second continuous wave generator, and

Claim 6

a second continuous wave generator, and

Claim 7

A color television decoding system for a receiver adapted to receive a composite color television signal comprising color synchronizing burst signals, luminance signal components, and first and second chrominance signal components amplitude modulated on a common sub-carrier and having quadrature phase modulation axes, the color phase sequence of the first and second chrominance signal components being periodically reversed by periodic reversal of the phase of the modulation axis for one of the chrominance signal components, said decoding system comprising: A. Delay means for delaying said chrominance components a predetermined length of time; B. First switching means for transmitting segments of said chrominance components for selected intervals of time, each equal to said predetermined length of time, whereby said delay means and said switching means cooperate to produce a continuous selected chrominance signal; C. First and second demodulator means to demodulate said continuous selected chrominance signal; D. First and second generator means to generate first and second reference sub-carrier signals, respectively; E. Control means connected to said generator means; and F. Second switching means for selectively connecting said burst signals to said control means to control the phase of said sub-carrier signals.

Claim 8

A color television decoding system for a receiver adapted to receive a composite color television signal comprising color synchronizing burst signals, luminance signal components, and first and second chrominance signal components amplitude modulated on a common sub-carrier and having quadrature phase modulation axes, the color phase sequence of the first and second chrominance signal components being periodically reversed by periodic reversal of the phase of the modulation axis for one of the chrominance signal components, said decoding system comprising: A. Delay means for delaying said chrominance components a predetermined length of time; B. First switching means for transmitting segments of said chrominance components for selected intervals of time, each equal to said predetermined length of time, whereby said delay means and said switching means cooperate to produce a continuous selected chrominance signal; C. First and second demodulator means to demodulate said continuous selected chrominance signal; D. First and second generator means to generate first and second reference sub-carrier signals, respectively; E. Control means connected to said generator means; and F. Second switching means for selectively connecting said burst signals to said control means to control the phase of said sub-carrier signals.

Claim 9

first and second input terminals, and

Claim 10

first and second input terminals, and

Claim 11

an input terminal to be connected to a source of said chrominance signal components, and

Claim 12

an input terminal to be connected to a source of said chrominance signal components, and

Claim 13

a first input terminal connected to said inverter to receive inverted burst signals,

Claim 14

a first input terminal connected to said inverter to receive inverted burst signals,

Claim 15

a first continuous wave generator,

Claim 16

a first continuous wave generator,

Claim 17

an input terminal to be connected to a source of said chrominance signal components, and

Claim 18

an input terminal to be connected to a source of said chrominance signal components, and

Claim 19

an output terminal connected to both of said demodulators to supply said segments of said chrominance components thereto; and B. Said delay means comprises:

Claim 20

an output terminal connected to both of said demodulators to supply said segments of said chrominance components thereto; and B. Said delay means comprises:

Claim 21

a second oscillator connected to said second continuous wave generator to be controlled thereby and connected to said second demodulator means to provide reference sub-carrier signals therefor.

Claim 22

a second oscillator connected to said second continuous wave generator to be controlled thereby and connected to said second demodulator means to provide reference sub-carrier signals therefor.

Claim 23

a second input terminal to receive non-inverted burst signals, and

Claim 24

a second input terminal to receive non-inverted burst signals, and

Claim 25

a first oscillator connected to said continuous wave generator to be controlled thereby and connected to said first demodulator means to provide reference sub-carrier signals therefor; and B. Said second generator means comprises:

Claim 26

a first oscillator connected to said continuous wave generator to be controlled thereby and connected to said first demodulator means to provide reference sub-carrier signals therefor; and B. Said second generator means comprises:

Claim 27

an output terminal, said first input terminal being connected to the source of said chrominance signal components, said second input terminal being connected to said output terminal of said delay means, and said output terminal of said switching means being connected to said first demodulator means to supply chrominance signal components thereto.

Claim 28

an output terminal, said first input terminal being connected to the source of said chrominance signal components, said second input terminal being connected to said output terminal of said delay means, and said output terminal of said switching means being connected to said first demodulator means to supply chrominance signal components thereto.

Claim 29

an output terminal; and B. Said first switching means comprises:

Claim 30

an output terminal; and B. Said first switching means comprises:

Claim 31

The decoding system of claim 1, comprising, in addition, a phase shift control circuit connected between said first generator means and said first demodulator to control the phase of said first reference sub-carrier signal.

Claim 32

an output terminal connected to said demodulator means to supply delayed repetitions of said segments of said chrominance components thereto.

Claim 33

an output terminal connected to said demodulator means to supply delayed repetitions of said segments of said chrominance components thereto.

Claim 34

The decoding system of claim 2, comprising, in addition, a second phase shift control circuit connected between said second generator means and said second demodulator and ganged with said first-named phase shift control circuit to control the phase of both of said reference sub-carrier signals simultaneously.

Claim 35

an output terminal connectable in a first condition to said first input terminal thereof and in a second condition to said second input terminal thereof; and B. Said first control circuit is connected to the output terminal of said second switching means to receive, alternately, non-inverted burst signals and inverted burst signals.

Claim 36

an output terminal connectable in a first condition to said first input terminal thereof and in a second condition to said second input terminal thereof; and B. Said first control circuit is connected to the output terminal of said second switching means to receive, alternately, non-inverted burst signals and inverted burst signals.

Claim 37

The decoding system of claim 1, in which both of said switching means operate synchronously at the line repetition rate of said television signal.

Claim 38

The decoding system of claim 4, in which said switching means are connected to operate in ganged relationship.

Claim 39

The decoding system of claim 1, in which: A. Said delay means comprises:

Claim 40

The decoding system of claim 6, in which said output terminal is connected to both of said demodulator means to supply said continuous selected chrominance signal thereto.

Claim 41

The decoding system of claim 6, in which said first switching means comprises a second output terminal connected to said second demodulator means to supply chrominance signal components thereto.

Claim 42

The decoding system of claim 1, in which: A. Said first switching means comprises:

Claim 43

The decoding system of claim 1, comprising, in addition, an inverter connected in series with said second switching means to invert selected burst signals.

Claim 44

The decoding system of claim 10, in which said control means comprises: A. A first control circuit connected to said first generator means; and B. A second control circuit connected to said second generator means.

Claim 45

The decoding system of claim 11, in which: A. Said second switching means comprises:

Claim 46

The decoding system of claim 12 in which said second input terminal of said second switching means is connected to input terminals of said inverter and said delay means.

Claim 47

The decoding system of claim 12 in which said first control circuit comprises: A. A burst gate circuit connected to said output terminAl of said second switching means to receive therefrom each burst signal in succession, alternate ones of said burst signals being inverted, said burst gate being connected to said first generating means to supply inverted and non-inverted burst signals alternately thereto; and B. A gate generator connected to said burst gate circuit to cause said burst gate to transmit only said burst signals.

Claim 48

The decoding system of claim 14 in which said second control circuit comprises a second burst gate circuit connected to receive each of said burst signals in sequence, the output of said second burst gate circuit being connected to said second generating means and said gate generator being connected to said burst gate circuit to control the operation thereof to transmit each of said burst signals in sequence to said second generating means.

Claim 49

The decoding system of claim 11 in which: A. Said first generator means comprises:

Claim 50

The decoding system of claim 12 in which said second input terminal of said second switching means is connected to said output terminal of said first switching means and said first and second switching means are ganged together.

Claim 51

The decoding system of claim 12 in which said first switching means comprises: A. A first input terminal connected to said delay means to receive delayed chrominance components; B. A second input terminal to receive non-delayed chrominance components; C. A first output terminal; and D. A second output terminal, each of said output terminals being connectable alternately to either of said input terminals, said first input terminal of said second switching means being connected to said first output terminal of said first switching means to receive non-inverted burst signals therefrom, said inverter being connected to said second input terminal of said second switching means to supply inverted burst signals thereto, and said output terminal of said second switching means being switched alternately at the end of each line interval from said first input terminal thereof to said second input terminal thereof to transmit, alternately, inverted and non-inverted burst signals to said first control circuit.

Claim 52

The decoding system of claim 18 comprising, in addition, a third switching means comprising: A. A first input terminal connected to said first output terminal of said first switching means to receive burst signals therewith; B. A second input terminal connected to said second output terminal of said first switching means to receive burst signals therefrom; and C. An output terminal connectable alternately to said first and second input terminals thereof to transmit said burst signals in succession through said third switching means.

Claim 53

The decoding system of claim 12 in which said first switching means comprises: A. A first output terminal connected directly to said first demodulator means; and B. A second output terminal connected directly to said second demodulator means.

Claim 54

The decoding system of claim 20 in which said first output terminal of said first switching means is connected to said first input terminal of said second switching means, and said inverter connects said second output terminal of said first switching means to said second input terminal of said second switching means.