Remote control system
First Claim
1. A remote control system including a transmitter and a receiver,said transmitter comprising a means for transmitting controlling signals corresponding to selected control functions, each of said controlling signals containing first frequency portions disposed in time sequences in accordance with a pulse code modulation, second frequency portions disposed to fill time spaces between parts of said first frequency, a last second frequency part disposed immediately to follow the coded first frequency part and a control retention signal part of the first frequency disposed after said last second frequency part, length of time of said retention signal part being controlled by means of a switch for controlling analog means;
- andsaid receiver comprising a means to decode said controlling signal to produce output signals corresponding to said selected items and a means to control said output signal in a manner to continue for the retention signal part.
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Accused Products
Abstract
In a remote control system, a transmitted signal comprising several bursts of f1 Hz arranged by coding input signal and other several bursts of f2 Hz inserted in spaces between said f1 Hz bursts is sent from a transmitter to a receiver which decodes the transmitted signal to produce a control signal without error even in the presence of noise.
23 Citations
7 Claims
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1. A remote control system including a transmitter and a receiver,
said transmitter comprising a means for transmitting controlling signals corresponding to selected control functions, each of said controlling signals containing first frequency portions disposed in time sequences in accordance with a pulse code modulation, second frequency portions disposed to fill time spaces between parts of said first frequency, a last second frequency part disposed immediately to follow the coded first frequency part and a control retention signal part of the first frequency disposed after said last second frequency part, length of time of said retention signal part being controlled by means of a switch for controlling analog means; - and
said receiver comprising a means to decode said controlling signal to produce output signals corresponding to said selected items and a means to control said output signal in a manner to continue for the retention signal part. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A remote control system including a transmitter and a receiver for controlling a plurality of functional systems,
said transmitter comprising encoding means for generating a signal indicative of a code; -
oscillator means, responsive to said signal indicative of a code, for transmitting to said receiver a control signal with said code, said control signal comprising a first sequence of alternating bursts of said first frequency and said second frequency in accordance with said code, and a subsequent retention pulse of said first frequency immediately following the last burst of said second frequency; and means, cooperating with said encoding means and said oscillator means, for controlling the duration of said retention pulse; and said receiver comprises; decoder means, responsive to said transmitted control signal, for generating a first output signal indicative of said code and a second output signal in accordance with the duration of said retention signal; said decoder means second output signal being applied to a selected one of said functional systems in accordance with said decoder means first output signal.
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Specification