JPH04267697A - Remote control system - Google Patents

Abstract

PURPOSE:To control other equipment by sending a control signal inputted from one equipment through a transmission line in plural devices interconnected by the transmission lines for an audio signal or the like. CONSTITUTION:An input section 3 of an equipment A inputs a signal to control an equipment B. The signal is modulated to a required high frequency signal at a transmission section 4 and superimposed on an audio signal or the like from a buffer amplifier 1 and the result is sent to the equipment B via an audio signal transmission line 5. A reception section 6 receives the above high frequency signal from a high frequency signal transmission line and demodulates the signal onto a control signal. Then the based on the control signal, a section 7 to be controlled is controlled for the equipment B. Moreover, a low pass filter(LPF) 8 separates the audio signal or the like from the said audio signal transmission line 5 and the signal is outputted to the audio signal circuit or the like via the terminal 9.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote control system, and more particularly, to a remote control system for remotely controlling other equipment connected to this equipment via video, audio, or video/audio equipment.

0002

[Prior Art] For example, there are satellite broadcast receivers (device A) and television receivers (device B).
When controlling these devices remotely, if machine A and machine B are made by the same manufacturer, one remote control unit (hereinafter referred to as
There are some models that allow you to operate both machines with a remote control (abbreviated as "remote control"), but in cases where A and B are made by different manufacturers, you need to use the remote control for A and B to operate A and B. In most cases, each operation must be performed using a separate remote control. Therefore, for example, if you set up a system in which a satellite broadcast program received by Aircraft A is viewed through Aircraft B, which is made by a different manufacturer than Aircraft A, two remote controllers, one for Aircraft A and one for Aircraft B, will be used. It is necessary to perform operations such as switching the A device to the required reception state and switching the B device to input the signal from the A device, which can be quite troublesome for inexperienced users. It is.

0003

[Problems to be Solved by the Invention] The present invention has been made in view of the above points. For example, when a system is set up in which a signal received by device A is output via device B, the signal received by device A is output from device B. The input remote control signal is modulated into the required high-frequency signal, which is used to connect devices. For example, it is superimposed on an audio signal transmission line, etc., and transmitted to the other device. At the transmission destination, it is demodulated into a remote control signal, and this remote control signal is The present invention provides a remote control system that allows necessary control to be carried out at.

0004

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention includes an input section into which control signals for operating equipment are input, and a signal from the input section that is modulated into a required high frequency signal to generate an audio signal. a transmitter that transmits the audio signal by superimposing it on a transmission line, a low-pass filter that separates the audio signal from the audio signal transmission line and outputs it to a signal circuit, etc., and a high-frequency signal that is transmitted through the audio signal transmission line. The object of the present invention is to provide a remote control system comprising a receiving section that receives and demodulates a control signal into a control signal, and a controlled section that is controlled by the control signal from the receiving section.

[0005]

[Operation] As configured as above, in the remote control system according to the present invention, a remote control signal inputted from one device is modulated into a required high frequency signal, and is transmitted to, for example, an audio signal transmission line connected to this device. etc. and is sent to the other device. Then, in the other device, the high frequency signal is demodulated into a remote control signal, and this device is controlled based on the demodulated signal.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a remote control system according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram of essential parts of an embodiment of a remote control system according to the present invention. In the figure, A is, for example, a device such as a satellite broadcast receiver. In device A, reference numeral 1 denotes a buffer amplifier that amplifies the audio signal etc. from the terminal 2 to a required signal level and sends it out via the audio signal transmission line 5 etc. 3 is an input unit into which, for example, a control signal from a remote control device is input. Reference numeral 4 denotes a transmitting section, which modulates the signal into a required high frequency signal based on the control signal via the input section 3, superimposes it on the audio signal transmission line 5, and transmits it. Further, B is, for example, a device such as a television receiver. In device B, 6 is a receiving section that receives the high frequency signal from device A and demodulates the control signal. Reference numeral 7 denotes a controlled section, which controls required functions based on the control signal from the receiving section 6. 8 is a low pass filter (LPF) that separates audio signals from the audio signal transmission line 5 and outputs them to a required audio signal circuit or the like via a terminal 9.

FIG. 2 is a block diagram of main parts of another embodiment of the remote control system according to the present invention. In the figure, equipment A
For example, device B is a satellite broadcast receiver, and device B is a television receiver. 11 of device A is a receiving section that receives a signal from a remote controller. Reference numeral 12 denotes a code memory, which stores the identification code of device B, etc. and the control code for controlling device B, etc., into a specific code set as a code to be sent and received between multiple devices such as device A and device B, for example. Remember it accordingly. Reference numeral 13 denotes a determining section that compares the signal from the receiving section 11 with the data read out from the code memory 12 and determines a matching specific code. 14 is a code generation section which generates a code signal based on the signal from the discrimination section 13. 15
is a modulation section that modulates a high frequency signal, for example, a 1 MHz (megahertz) signal, which does not affect the audio signal, from the oscillation section 16 based on the signal from the code generation section 14, and sends it to the audio signal transmission line 5. Superimpose. 17 is a control unit that controls each part of the device A;

[0008] Also, 18 of device B is a high-pass filter (
HPF) separates the superimposed high frequency signal transmitted from device A via the audio signal transmission line 5. A demodulation/code conversion section 19 receives the high frequency signal and demodulates it into a code signal. 20 is a code storage unit that stores the identification code, control code, etc. of device B in correspondence with the specific code. Reference numeral 21 denotes an identification section that compares the signal from the demodulation/code conversion section 19 with the data read out from the code storage section 20, and identifies a control code based on a match between the identification codes. 22 is an output unit that generates and outputs a control signal for controlling device B based on the signal from the identification unit 21. A receiving unit 23 receives a code signal from a remote control for device B, for example. This code signal is transferred to the code storage unit 20 by a required operation.
and is stored in correspondence with the specific code. Other symbols are the same as those in FIG. 1, so explanations will be omitted.

Next, the operation of the remote control system according to the present invention will be explained with reference to the case shown in FIG. First, the infrared remote control signal transmitted from the remote control device, for example, is transmitted by device A.
input to the input section 3. The input section 3 converts the binary data of "1" and "0" forming the code of the remote control signal into electrical signals of "high" and "low" and outputs them, and inputs them to the transmitting section 4. The transmitter 4 modulates a desired carrier signal, for example, a 1 MHz high frequency signal, using a frequency shifting (FS) method, a phase modulation (PM) method, or the like based on the input signal. That is, in the case of a frequency shifting method, for example, the "high" signal is set at 1100 Hz and the "low" signal is set at 1300 Hz.
The signal is shifted to two Hertz frequencies, modulated, and sent to the audio signal transmission line 5. The audio signal transmission line 5 is connected to the buffer amplifier 1
This is a signal line for transmitting audio signals, etc. distributed in the range of approximately several tens of hertz to approximately 20 kilohertz, which are outputted via the transmitted. This high frequency signal is input to the receiving section 6 of device B, demodulated into a "high" signal and a "low" signal by a demodulation circuit, and then converted into a binary code signal of "1" and "0" through a filter. converted. This signal is input to the controlled section 7 and is generated into a required control signal to control the operation of the device B. Also, the buffer amplifier 1 transmitted by the audio signal transmission line 5
The audio signals and the like are separated by the LPF 8 and outputted to the audio signal circuit etc. via the terminal 9.

The operation in the case of FIG. 2 will be explained with reference to the flowchart of FIG. A signal such as infrared rays from a remote controller for operating device B is received by the receiving section 11 of device A,
It outputs binary data of "1" and "0" (step 1, hereinafter abbreviated as ST1). The remote control signal is, for example, an identification code set to identify device B and a control code for switching device B to signal input from device A. These signals are sent to the discriminating unit 1 via the control unit 17.
3 and compared with the data read out from the code memory 12 via the control unit 17 to determine a specific code corresponding to the identification code and a specific code corresponding to the control code (ST2). The signal from the discrimination section 13 is inputted to the code generation section 14 via the control section 17, and the "1" and "0" data constituting the specific code are converted into "high" and "low" signals, respectively. Output (ST3
). This signal is input to the modulation section 15, and a frequency shifting method is used in which the high frequency signal of, for example, 1 MHz from the oscillation section 16 is shifted to two frequencies: the "high" signal at 1100 Hz and the "low" signal at 1300 Hz. etc., and superimposes it on the audio signal etc. from the buffer amplifier 1, and sends it out to the audio signal transmission line 5 (ST4).

[0011] The high frequency signal input to device B passes through HPF18.
and input to the demodulation/code conversion section 19. And first, the "high" signal and "low" signal than the high frequency signal.
The signals are demodulated and then converted into binary codes of "1" and "0" (ST5). The converted data is input to the identification section 21 via the control section 24, and compared with the data read out from the code storage section 20 via the control section 24.
If the specific code corresponding to the identification code of the own machine is identified (ST6: Yes), then the specific code corresponding to the control code is identified (ST7). The signal from the identification section 21 is input to the output section 22, where it is generated into a required control signal to control device B (ST9).

[0012] In the above case, since device B is operated through device A, it may be difficult to confirm whether device B is in the desired operating state. Therefore, when executed in response to a command such as power on or signal input switching, device B outputs a signal (ST9), modulates it into a required high frequency signal, and transmits it to device A via an audio signal transmission line, etc. (ST10). Then, the A machine demodulates this high frequency signal (ST11), determines the execution signal (ST12),
If the determination is not made (ST13: No), if the determination is not made even after waiting the required time, for example, 3 seconds (ST14
:Yes), the process returns to ST3 and the subsequent operations are performed again.

[0013] As described above, for example, by pointing the remote control toward the satellite broadcasting receiver, the satellite broadcasting receiver is activated, and furthermore, the input of the television receiver is switched to the signal input of the satellite broadcasting receiver, The broadcast signal received by the satellite broadcast receiver will be displayed on the television receiver. In addition, for example, an audio device is connected as device C to this system, and this audio device is operated in the same manner as described above by the required operation, and signals such as stereo music performance from a satellite broadcasting receiver are transmitted via this audio device. You can also output it and listen to it in high quality.

[0014] In the above, the code of the signal from the remote control device is converted to a specific code consisting of a smaller number of bits than the 16 bits used for remote control signals. Although it is possible to prevent code discrimination errors by repeatedly transmitting the same data, the control signal from the remote control is input to the modulator 15 and modulated without being converted, and the control signal for device B is transmitted by device B. It may also be converted into code. Further, the code storage unit 20 can also store a control code for the own machine based on a signal inputted from a remote control for the own machine via the receiving unit 23. Note that although the above explanation has been given in which a remote control signal is input to device A to control device B, it is also possible to input a remote control signal from device B to control device A.

[0015]

[Effects of the Invention] As explained above, according to the remote control system of the present invention, by pointing a remote control device at one device and operating it, this device can be connected to another device via an audio signal transmission line or the like. Moreover, it is not necessary to arrange a control signal transmission line for the operation between these devices. In other words, for example, in the case of a system consisting of a satellite broadcast receiver, television receiver, audio equipment, etc., it is possible to operate the other equipment by simply pointing the remote control at one of the equipment. It is. Therefore, for example, when receiving satellite broadcasting using this system, select the receiving channel of the satellite broadcasting receiver, switch the television receiver to the input from the satellite broadcasting receiver, and then set the input of the audio device to receive the satellite broadcasting. It is possible to easily operate each device in a desired state without having to perform complicated operations such as switching to input from the machine, and it can eliminate the concerns of those who feel that they are not good at such operations. .

[Brief explanation of the drawing]

FIG. 1 is a block diagram of essential parts of an embodiment of a remote control system according to the present invention.

FIG. 2 is a block diagram of main parts of another embodiment of the remote control system according to the present invention.

FIG. 3 is a flowchart for explaining the operation of the remote control system according to the present invention.

[Explanation of symbols]

1 Buffer amplifier 3 Input section 4 Transmission section 5 Audio signal transmission line 6 Receiving section 7 Controlled part 8 Low pass filter 11 Receiving section 12 Code memory 13 Discrimination section 14 Code generation section 15 Modulation section 18 High pass filter 19 Demodulation/code conversion section 20 Code storage section 21 Identification part 23 Receiving section

Claims (4)

[Claims] 1. An input section for inputting a control signal for operating the device; a transmitting section for modulating the signal from the input section into a required high-frequency signal, superimposing it on an audio signal transmission line, etc., and transmitting the same,
It consists of a low-pass filter for separating the audio signal etc. from the audio signal transmission line and outputting it to a signal circuit, etc., and a receiving section that receives the high frequency signal via the audio signal transmission line and demodulates it into a control signal. , and a controlled section controlled by a control signal from a receiving section. 2. A first receiving section that receives a code signal from a remote control signal transmitter for operating equipment, and a voice signal transmission line, etc. that modulates the signal into a required high frequency signal based on the signal from the first receiving section. a modulation unit that superimposes the signal on the audio signal and sends it out; a low-pass filter that separates the audio signal etc. from the audio signal transmission line and outputs it to a signal circuit, etc.; and a low-pass filter that receives the high frequency signal via the audio signal transmission line. a demodulation/code conversion section that demodulates and converts it into a code signal; a first code storage section that stores the identification code and control code of the own aircraft; and a signal from the demodulation/code conversion section that is read out from the first code storage section. It consists of an identification section that compares the control code with the data and identifies the control code based on a match between the identification codes, and a first control section that controls the demodulation/code conversion section, the first code storage section, and the identification section. 1. A remote control system comprising: an output section that outputs a control signal for controlling equipment based on the signal. 3. A first receiving section that receives a code signal from a remote control signal transmitter for operating the device; and a first receiving section that receives a code signal from a remote control signal transmitter for operating the device; a code memory that stores the respective signals in a corresponding manner; a determining unit that compares the signal from the first receiving unit with data read from the code memory to determine a specific code; and generating a code signal based on the signal from the determining unit. It consists of a code generation section, and a second control section that controls the first reception section, code memory, discrimination section, and code generation section, and modulates the signal from the code generation section into a required high-frequency signal and transmits the audio signal. a modulation unit that superimposes the audio signal on the audio signal transmission line and sends it out; a low-pass filter that separates the audio signal, etc. from the audio signal transmission line and outputs it to a signal circuit, etc.; and a high-frequency signal that passes through the audio signal transmission line. a demodulation/code conversion section that receives, demodulates, and converts it into a code signal; a second code storage section that stores the identification code and control code of its own aircraft in correspondence with the specific code;
an identification section that compares the signal from the code conversion section with the data read out from the second code storage section and identifies a control code based on a match between the identification codes, the demodulation/code conversion section, the second code storage section, and the identification section; and a third control section to control,
A remote control system comprising: an output section that outputs a control signal for controlling a device based on a signal from the identification section. 4. A second receiving section controlled by the first control section or the third control section that receives a code signal from a remote control signal transmitter for operating other equipment is provided, and the second receiving section is controlled by the first control section or the third control section, and the second receiving section receives a code signal from a remote control signal transmitter for operating another device, and , wherein the signal from the second receiving section is configured to correspond to the specific code and stored in the first code storage section or the second code storage section. remote control system.