System and method for automatic compensation of video signals
AssigneeXantech Corporation
InventorCharles R. Smiley
Life of this patent
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Abstract
A system for delivering signal, such as video signal, over signal carrier, such as twisted-pair cable. The system includes a video source connected to a terminal of the signal carrier and providing video signals thereto. An amplifier is coupled to a second terminal of the signal carrier at the receiving end. A source reference signal generator is connected to a first terminal of a second signal carrier. A second amplifier is connected to a second terminal of the second signal carrier at the receiving end. A comparator is connected to an output of the second amplifier and a receiver reference signal. An output of the comparator is provided to a gain control of the variable gain amplifier.
Claims42
A system for delivering a signal over a signal carrier having a first terminal and a second terminal, the system comprising:
- a signal source coupled to a first terminal of the signal carrier;
- a first amplifier coupled to a second terminal of the signal carrier;
- a source reference signal generator coupled to a first terminal of a second signal carrier;
- a second amplifier coupled to a second terminal of the second signal carrier;
- and
- a comparator coupled to an output of the second amplifier and a receiver reference signal generator;
- wherein an output of the comparator is an input to the first amplifier and the second amplifier, and the first and second amplifiers provide compensation control in response to the input.
A system for delivering a signal over a signal carrier having first and second terminals, the system comprising:
- a signal source coupled to a first terminal of the signal carrier;
- a first amplifier coupled to the second terminal of the signal carrier;
- a first source reference signal generator coupled to a first terminal of a second signal carrier;
- a second source reference signal generator also coupled to the first terminal of the second signal carrier;
- a second amplifier coupled to a second terminal of the second signal carrier;
- a first comparator coupled to an output of the second amplifier and a receiver reference signal;
- and
- a second comparator coupled to the output of the second amplifier and a second receiver reference signal;
- wherein an output of the first comparator is an input to the first amplifier and the second amplifier, and the first and second amplifiers provide compensation control in response to the input, and wherein an output of the second comparator is coupled to a gain control of the first amplifier.
A method for delivering a signal over a signal carrier comprising the steps of:
- (a) providing the signal to a first terminal of the signal carrier;
- (b) receiving and amplifying a high frequency signal at a second terminal of the signal carrier;
- (c) providing a source reference signal to a first terminal of a second signal carrier;
- (d) receiving and amplifying the source reference signal at a second terminal of the second signal carrier;
- (e) providing a receiver reference signal;
- (f) comparing the amplified source reference signal and the receiver reference signal and generating a correction signal;
- and
- (g) adjusting the compensation of the received high frequency signal in accordance with the correction signal.
A method for delivering a signal over a signal carrier comprising the steps of:
- (a) providing a high frequency signal to a first terminal of the signal carrier;
- (b) receiving and amplifying the high frequency signal at a second terminal of the signal carrier;
- (c) providing a first source reference signal to a first terminal of a second signal carrier;
- (d) receiving and amplifying the first source reference signal at a second terminal of the second signal carrier;
- (e) providing a second source reference signal at a first terminal of a second signal carrier;
- (f) receiving and amplifying the second source reference signal at the second terminal of the second signal carrier;
- (g) providing first and second receiver reference signals;
- (h) comparing the amplified first source reference signal and the first receiver reference signal and generating a first correction signal;
- (i) comparing the amplified second source reference signal and the second receiver reference signal and generating a second correction signal;
- (j) adjusting a first compensation of the received high frequency signal in accordance with the first correction signal;
- and
- (k) adjusting a second compensation of the received high frequency signal in accordance with the second correction signal.
A system for delivering a signal over a signal carrier having a transmitting terminal and a receiving terminal, comprising:
- a signal source coupled to the transmitting terminal of the signal carrier;
- an amplifier coupled to the receiving terminal of the signal carrier;
- a source reference signal generator also coupled to the transmitting terminal of the signal carrier;
- and
- a comparator coupled to an output of the amplifier and a receiver reference signal generator;
- wherein an output of the comparator is coupled to a compensation control of the amplifier.
Dependencies are inferred from the claim text.