Noise resistant remote control system
First Claim
1. A method for providing control commands to electronic equipment from a remote control device, the method comprising:
- receiving a control command signal transmitted from a remote control transmitter at a remote location, the control command signal has a first carrier wave, wherein the first carrier wave includes a noise component from a first source;
removing the first carrier wave from the control command signal so as to also remove the noise component;
generating a second carrier wave having a frequency substantially equal to the first carrier wave; and
modulating the second carrier wave with the control command signal after the first carrier wave has been removed to produce an output command signal.
3 Assignments
0 Petitions
Accused Products
Abstract
A method for providing control commands to electronic equipment from a remote location comprises receiving a control command signal transmitted from a remote location The control command signal has a first carrier wave that includes a noise component. The method further comprises removing the first carrier wave from the control command signal, such that the noise component is also removed, thereby producing a TTL signal. The method further comprises generating a second carrier wave having a frequency substantially equal to the first carrier wave. The method further comprises applying the second carrier wave to the TTL signal to produce an output command signal.
13 Citations
31 Claims
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1. A method for providing control commands to electronic equipment from a remote control device, the method comprising:
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receiving a control command signal transmitted from a remote control transmitter at a remote location, the control command signal has a first carrier wave, wherein the first carrier wave includes a noise component from a first source;
removing the first carrier wave from the control command signal so as to also remove the noise component;
generating a second carrier wave having a frequency substantially equal to the first carrier wave; and
modulating the second carrier wave with the control command signal after the first carrier wave has been removed to produce an output command signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of filtering a remote control device signal, comprising:
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receiving at a detector an infrared command signal from a remote control transmitter, the command signal including a noisy carrier at a first frequency and remote control command data that modulates the carrier;
selectively filtering out the carrier at the first frequency;
using a second carrier to carry the remote control command data to a receiving device. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A remote control apparatus comprising:
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a photodetector configured to receive an infrared signal generated by a remote control, wherein the photodetector is exposed to a source of electromagnetic noise in the non-visible light spectrum;
an input circuit for generating a command signal from the infrared signal detected by the photodetector, the command signal including a logic portion, a carrier portion and a noise portion;
a filter circuit for removing the carrier portion and the noise portion of the command signal, thereby providing a logic signal corresponding to the command logic portion that is substantially free from effects of the electromagnetic noise;
a circuit that generates a replacement carrier signal and that modulates the replacement carrier signal with the logic signal; and
an output terminal configured to output the modulated replacement carrier signal. - View Dependent Claims (20, 21, 22, 23, 24)
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25. A system comprising:
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a remote control for generating a command signal; and
a relay system, including a receiver which can be exposed to a source of light noise, the relay system configured to receive the command signal in the form of an infrared signal from the remote control, remove from the command signal a noise component caused by the light noise, and output a filtered infrared command signal, wherein the relay system is positioned remotely from the remote control. - View Dependent Claims (26, 27, 28, 29, 30, 31)
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Specification