Method and system for tint control for component video signals
View Patent ↗A method and system are provided for controlling tint of component video signals. The system includes a first input for receiving a first component video signal; a second input for receiving a second component video signal; circuitry including a first differential amplifier and a second differential amplifier for receiving the first and second component video signals from the first and second inputs, respectively; a first output connected to the circuitry for outputting a first tint control adjustment signal for the first component video signal; and a second output connected to the circuitry for outputting a second tint control adjustment signal for the second component video signal. The first outputted signal is represented as V+kU−2ckU and the second outputted signal is represented as U−kV+2ckV, where V represents the first component video signal, U represents the second component video signal, k is a constant, and c is a value greater than or equal to zero and less than or equal to one.
1. A tint control system for component video signals comprising:
a first input for receiving a first component video signal;
a second input for receiving a second component video signal;
circuitry including a first differential amplifier and a second differential amplifier for receiving the first and second component video signals from the first and second inputs, respectively, said first and second differencial amplifiers each including a pair of transistors;
a first output connected to the circuitry for outputting a first tint control adjustment signal for the first component video signal; and
a second output connected to the circuitry for outputting a second tint control adjustment signal for the second component video signal,
wherein a collector of one transistor of each pair of transistors of the first and second differential amplifiers is connected to an operating voltage.
2. The system according to claim 1 , wherein the first outputted signal is represented as V+kU−2ckU, where V represents the first component video signal, U represents the second component video signal, k is a constant, and c is a value greater than or equal to zero and less than or equal to one.
3. The system according to claim 1 , wherein the second outputted signal is represented as U−kV+2ckV, where V represents the first component video signal, U represents the second component video signal, k is a constant, and c is a value greater than or equal to zero and less than or equal to one.
4. The system according to claim 1 , wherein a base of a respective transistor of the pair of transistors of the first differential amplifier is directly connected to a base of a respective transistor of the pair of transistors of the second differential amplifier.
5. The system according to claim 1 , wherein the emitters of each pair of transistors are connected to ground via a transistor connected in series with a resistor.
6. A tint control system for component video signals comprising:
a first input for receiving a first component video signal;
a second input for receiving a second component video signal;
circuitry including a first differential amplifier and a second differential amplifier for receiving the first and second component video signals from the first and second inputs, respectively, said first and second differential amplifiers each including a pair of transistors;
a first output connected to the circuitry for outputting a first tint control adjustment signal for the first component video signal; and
a second output connected to the circuitry for outputting a second tint control adjustment signal for the second component video signal,
wherein a collector of one transistor of the pair of transistors of the first differential amplifier is connected to the first input via a resistor and to the first output.
7. A tint control system for component video signals comprising:
a first input for receiving a first component video signal;
a second input for receiving a second component video signal;
circuitry including a first differential amplifier and a second differential amplifier for receiving the first and second component video signals from the first and second inputs, respectively, said first and second differential amplifiers each including a pair of transistors;
a first output connected to the circuitry for outputting a first tint control adjustment signal for the first component video signal; and
a second output connected to the circuitry for outputting a second tint control adjustment signal for the second component video signal,
wherein a collector of one transistor of the pair of transistors of the second differential amplifier is connected to the second input via a resistor and to the second output.
8. A tint control system for component video signals comprising:
a first input for receiving a first component video signal;
a second input for receiving a second component video signal;
circuitry including a first differential amplifier and a second differential amplifier for receiving the first and second component video signals from the first and second inputs, respectively, said first and second differential amplifiers each including a pair of transistors;
a first output connected to the circuitry for outputting a first tint control adjustment signal for the first component video signal; and
a second output connected to the circuitry for outputting a second tint control adjustment signal for the second component video signal,
wherein a base of one transistor of the pair of transistors of the first differential amplifier is connected to a third input via a resistor for receiving a control signal for the first component video signal.
9. A tint control system for component video signals comprising:
a first input for receiving a first component video signal;
a second input for receiving a second component video signal;
circuitry including a first differential amplifier and a second differential amplifier for receiving the first and second component video signals from the first and second inputs, respectively, said first and second differential amplifiers each including a pair of transistors;
a first output connected to the circuitry for outputting a first tint control adjustment signal for the first component video signal; and
a second output connected to the circuitry for outputting a second tint control adjustment signal for the second component video signal, wherein a base of one transistor of the pair of transistors of the second differential amplifier is connected to a third input via a resistor for receiving a control signal for the first component video signal.
10. A method for controlling tint of component video signals, the method comprising the steps of:
receiving a first component video signal;
receiving a second component video signal;
providing circuitry including a first differential amplifier and a second differential amplifier for receiving the first and second component video signals, respectively, the first and second differential amplifiers each including a pair of transistors;
outputting a first tint control adjustment signal for the first component video signal; and
outputting a second tint control adjustment signal for the second component video signal,
wherein a collector of one transistor of each pair of transistors is connected to an operating voltage.
11. The method according to claim 10 , wherein the first outputted signal is represented as V+kU−2ckU, where V represents the first component video signal, U represents the second component video signal, k is a constant, and c is a value greater than or equal to zero and less than or equal to one.
12. The method according to claim 10 , wherein the second outputted signal is represented as U−kV+2ckV, where V represents the first component video signal, U represents the second component video signal, k is a constant, and c is a value greater than or equal to zero and less than or equal to one.
13. The method according to claim 10 , wherein a base of a respective transistor of the pair of transistors of the first differential amplifier is directly connected to a base of a respective transistor of the pair of transistors of the second differential amplifier.
14. The method according to claim 10 , wherein the emitters of each pair of transistors are connected to ground via a transistor connected in series with a resistor.
15. A method for controlling tint of component video signals, the method comprising the steps of:
receiving a first component video signal;
receiving a second component video signal;
providing circuitry including a first differential amplifier and a second differential amplifier for receiving the first and second component video signals, respectively, the first and second differential amplifiers each including a pair of transistors;
outputting a first tint control adjustment signal for the first component video signal; and
outputting a second tint control adjustment signal for the second component video signal,
wherein a collector of one transistor of the pair of transistors of the first differential amplifier is connected to an input via a resistor for receiving the first component video signal and to an output for outputting the first signal.
16. A method for controlling tint of component video signals, the method comprising the steps of:
receiving a first component video signal;
receiving a second component video signal;
providing circuitry including a first differential amplifier and a second differential amplifier for receiving the first and second component video signals, respectively, the first and second differential amplifiers each including a pair of transistors;
outputting a first tint control adjustment signal for the first component video signal; and
outputting a second tint control adjustment signal for the second component video signal,
wherein a collector of one transistor of the pair of transistors of the second differential amplifier is connected to an input via a resistor for receiving the second component video signal and to an output for outputting the second signal.
17. A method for controlling tint of component video signals, the method comprising the steps of:
receiving a first component video signal;
receiving a second component video signal;
providing circuitry including a first differential amplifier and a second differential amplifier for receiving the first and second component video signals, respectively, the first and second differential amplifiers each including a pair of transistors;
outputting a first tint control adjustment signal for the first component video signal; and
outputting a second tint control adjustment signal for the second component video signal,
wherein a base of one transistor of the pair of transistors of the first differential amplifier is connected to an input via a resistor for receiving a control signal for the first component video signal.
18. A method for controlling tint of component video signals, the method comprising the steps of:
receiving a first component video signal;
receiving a second component video signal;
providing circuitry including a first differential amplifier and a second differential amplifier for receiving the first and second component video signals, respectively, the first and second differential amplifiers each including a pair of transistors;
outputting a first tint control adjustment signal for the first component video signal; and
outputting a second tint control adjustment signal for the second component video signal, wherein a base of one transistor of the pair of transistors of the second differential amplifier is connected to an input via a resistor for receiving a control signal for the first component video signal.