JPH06165261A - Remote controller - Google Patents

Abstract

PURPOSE:To control an operation object for which the necessity of ensuring safety is low and the operation object for which the necessity of ensuring the safety is high with one controller by applying error correction codes for which error correction ability is mutually different for respective codes. CONSTITUTION:The output terminal of a first code generator 22 is connected through the first code generator 24, the output terminal of a second code generator 23 is connected through the second code generator 25 and the output terminal of a third code generator 26 is connected through the third code generator 27 to the input terminal of a code synthesizer 28. Then, operation object identification codes, controller identification codes and codes for indicating the instructions of control, the error correction codes whose error correction ability is mutually different or error inspection codes whose error inspection ability is different are applied. Thus, the transmission success rate of the codes to be transmitted can be improved and also, since the codes whose error correction ability or error inspection ability is high are added to the codes for discriminating the operation object, the selection error of the operation object due to noise or the like can be prevented with a high probability.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for remotely controlling a plurality of operation targets with a single controller via a communication medium.

[0002]

2. Description of the Related Art Conventionally, a device for remotely controlling a plurality of AV devices such as a television and an audio device with a single controller via a communication medium such as radio waves or infrared rays has an information code required for the control from each controller. It controls by transmitting to the receiver installed in the equipment. However, at that time, since the information transmitted due to the influence of noise, interference, etc. causes a code error and the control of the AV equipment is erroneously high, the reliability of the information code transmission is increased to enable smooth control. An error correction code or an error check code may be applied to the information.

Conventionally, in such a remote control device, the controller has a plurality of A's to be remotely controlled as shown in FIG.
Designation key 1 for designating any of V devices and its AV
A key pad 3 having a selection key 2 for selecting a control instruction for the device is provided, and a designation key 1 and a selection key 2 are provided.
Are connected to the input terminals of the first code generator 4 and the second code generator 5, respectively. In addition, the first code generator 4 and the second code generator 5
And the output end of each third code generator 6 is connected to the input end of the code synthesizer 7, and the output end of the code synthesizer 7 is connected to the antenna 10 via the check code generator 8 and the modulator 9. The output terminal of the local oscillator 11 is connected to the input terminal of the modulator 9 so that the modulated wave of the information code necessary for remotely operating each AV device is transmitted from the antenna 10.

On the other hand, a plurality of AV devices 12, 12, 12,
As shown in FIG. 4, receivers 13 are respectively connected to the ... And each receiver 13 connects the output end of the antenna 14 to the input end of the extractor 17 via the demodulator 15 and the decoder 16, and The three output terminals of the extractor 17 are respectively connected to the input terminals of the controller 18, and the operation target AV equipment 12 is controlled by the output signal of the controller 18 according to the code sequence of the information code. It was

[0005] In such a remote control device, for example, when powering on a television of a plurality of AV devices, a code for selecting the television to be operated by operating the designation key 1 of the controller is set as a unique word. A code output from the first code generator 4 or a code indicating that the power of the television is turned on by operating the selection key 2 is output from the second code generator 5 as a control code, and the controller is distinguished from other controllers. The third code generator 6 outputs an ID code for doing so, and the code synthesizer 7 outputs a sequence code in which the ID code, the unique word, and the control code are arranged in this order as an information code. Further, the information code to which the single parity check code is added is output from the check code generator 8 and a modulated wave in which the information code is superimposed on a predetermined carrier is sent from the modulator 9 via the antenna 10. It should be noted that the ID code is for limiting the controller that permits the control of each operation target.

On the other hand, the receiving device 13 attached to the television 12 to be operated demodulates the information code including the single parity check code from the modulated wave by the demodulator 15, and also includes the information including the unique word and the single parity check code. When the decoder 16 determines from the state value of the code that the information code has no code error, the extractor 17 extracts the ID code and the control code from the information code excluding the unique word and the single parity check code. Separated, the two codes and the unique word are individually output. Also, the ID code is the TV 12
Control signal that is predetermined for the control code only when the controller 18 determines that the unique word matches the ID code assigned to the controllable controller and the unique word matches the unique word assigned to the television 12. Is output to control the power of the television 12 to be turned on to prevent a control error with respect to the AV device due to noise or the like.

However, in such a remote control device for operating a plurality of AV devices, for example, when a garage opening / closing device is included in the operation target, an operator is remotely controlling the AV devices by a controller. Even if the garage opening / closing device is accidentally operated due to noise or the like and a third party is drawn into the garage by mistake, the operator often does not pay attention to operations other than the current operation target, which causes personal injury and is a problem in ensuring safety. There is. On the other hand, when an error check code having a high error check capability is added to the information code in order to prevent such an accident, the code length of the error check code becomes long, and the code length of the information code sent from the controller is very large. Since the information code becomes long, the information code is easily affected by noises and other signals sent from the controller, the success rate of transmitting the information code to the operation target is lowered, and the battery driving the controller is quickly consumed. There is. For this reason, it has been difficult to realize a device that remotely controls AV equipment, which has a low need to secure the operation target, and a garage opening / closing device, which has a high need to secure the safety, with a single controller.

[0008]

SUMMARY OF THE INVENTION The present invention solves the problems of the conventional remote control device as described above by selecting the error correction or detection capability according to the importance of each code to be transmitted.
This was done in order to configure a practical control system by suppressing the code length of such information, and it is necessary to ensure safety without reducing the success rate of transmission of the information code to be sent from the controller to the operation target. An object of the present invention is to provide a remote control device capable of controlling an operation target having low property and an operation target having a high necessity of ensuring safety with one controller.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, a remote control device of the present invention uses at least one controller to provide a plurality of operation targets with an operation target identification code, a controller identification code, and a code representing a control content via a communication medium. In the means for transmitting and remote controlling, the operation target identification code, the controller identification code, and the code representing the control instruction are applied with error correction codes having different error correction capabilities or error check codes having different error checking capabilities. Means to do.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on the embodiments shown in the drawings. FIG. 1 is a block diagram showing an embodiment of a controller in a remote control device of the present invention. In the figure, reference numeral 19 denotes a keypad, which is a designation key 20 for designating any of a plurality of operation target devices to be remotely controlled.
And a selection key 21 for selecting a control instruction for the operation target device, and a designation key 20 and a selection key 21.
Are respectively connected to the first code generator 22 and the second code generator 23. Further, the first code generator 24 is connected to the output terminal of the first code generator 22, the second code generator 25 is connected to the output terminal of the second code generator 23, and the output terminal of the third code generator 26 is connected to the output terminal of the third code generator 26. Is connected to the input terminal of the code synthesizer 28 via the third code generator 27, respectively. Further, the antenna 30 is connected to the output end of the code synthesizer 28 via the modulator 29, and the output end of the local oscillator 31 is connected to the input end of the modulator 29 so that the antenna 3
The modulated wave of the information code necessary for remotely operating each operation target device is transmitted from 0.

On the other hand, a plurality of operation target devices 32, 32, 3
2, receiving devices 33 are respectively connected as shown in FIG. 2, and each receiving device 33 connects an antenna 34 to an input end of an extractor 36 via a demodulator 35 and extracts the extractor 3
The three output terminals 6 are connected to the input terminals of the controller 40 via the first decoder 37, the second decoder 38, and the third decoder 39, respectively, and the operation target device is output by the output signals of the controller 40. 32 is configured to be controlled according to the code sequence of the information code.

The remote control device configured as described above operates as follows. That is, among the plurality of operation objects, when the power of the TV is controlled, for example, the operation of the operation object whose safety is not required as described above is controlled, the TV is selected by operating the designation key 20 of the controller. Is output as a unique word from the first code generator 22, and a code indicating that the selection key 21 is operated to turn on the power of the television is output from the second code generator 23 as a control code. The ID code for identifying the controller from other controllers is the third code generator 2
Output from 7. Also, a unique word to which a triple error correction code (a method in which each code has a Hamming distance of 6 bits or more) is applied from each of the first code generator 24, the second code generator 25, and the third code generator 27, A control code to which a single parity check code is applied and an ID code to which a single error correction code (a method in which a Hamming distance of 2 bits or more is provided between each code) are applied respectively, and these error check codes or errors The ID code to which the correction code is applied, the unique word, and the sequence code arranged in this order are output from the code combiner 28 as information codes. Further, a modulated wave in which the information code is superimposed on a predetermined carrier wave is transmitted from the modulator 29 via the antenna 30. Here, since the extractor 36 only needs to be able to detect the start of the information code as described above, the allowable error bit number may be the same as or smaller than the allowable error bit number of the first combiner 37. .

On the other hand, the receiving device 33 attached to the television 32 to be operated demodulates the information code including the error correction code and the error check code from the modulated wave by the demodulator 35, and triples the unique word included in the information code. While allowing an error, the start of the information code is detected by the extractor 36 to cause the unique word to function as a synchronization signal, and based on the detection, the remaining error correction code or error check code I
The D code and the control code are separated, and each code is separated by the first decoder 3
7, to the second decoder 38 and to the third decoder 39, respectively. In addition, the first unique word including the triple error correction code
The decoder 37 decodes the original unique word, and when it is determined from the state value of the decoding code that the decoding is normally performed, the decoded unique word is controlled by the controller 40.
Output to and perform the following operations.

That is, when the ID code including the single error correction code is decoded by the second encoder into the original ID code, and it is judged from the state value of the decoded code that the decoding can be normally performed. The decoded ID code is output to the controller 40.
When such a determination is made, when the third decoder 39 determines from the state value of the control code including the single parity check code that the code has no code error, the single parity check is performed. The control code excluding the code is output to the controller 40.

After that, when the controller 18 determines that the extractor 17 outputs the unique word, the ID code and the control code, the controller 18 determines that the ID code is the TV 32.
When it is determined that the unique code matches the ID code assigned to the controller that permits the control of the TV and the unique word matches the unique word assigned to the TV 32, the TV outputs the predetermined control signal to the control code. The control is performed so that the power of 32 is turned on, and a control error to the operation target device due to noise or the like is prevented. Further, at this time, the remote control device adds the error correction code or the error check code to each of the information code transmitted from the controller to the receiving device as described above and adds the error correction code or the error check code. Since the code length is reduced and the decoding process is performed for each code, the success rate of transmission of the information code can be improved.

Further, the remote control device operates the designation key 20 and the selection key 21 of the controller as described above even when the control of the operation target for which safety is highly required is controlled, for example, the control of the garage opening / closing device. As a result, a modulated wave in which an information code is superimposed on a predetermined carrier wave is transmitted from the antenna 30, and a code having a high error correction capability is added to the unique word for identifying the operation target device. It is possible to prevent an erroneous selection of a target with a high probability, and it is possible to ensure the safety of remote control for the garage opening / closing device.

In the above embodiment, the ID code to which the error check code or the error correction code is applied, the sequence code in which the unique word and the control code are arranged in this order is sent from the controller as the information code. Not limited to this, the ID code and the control code to which the error check code or the error correction code is applied are interchanged (interleaved) or randomized (scrambled), and the two codes are time-series according to a predetermined rule. The combined code and the unique word to which the error check code or the error correction code is applied may be transmitted from the controller as an information code, and the decoding function of the receiving device may be changed according to the code combination of the information code. Here, if the codes are replaced, the ID code and the control code are not concentrated in the information code,
It would be convenient to reduce control errors due to burst errors caused by noise, interference, interference, etc. mixed in the communication medium. Further, the randomization means that the ID code and the control code to which the error correction or detection code is applied are exclusive ORed with a specific code sequence to equalize the number of positive and negative bits of both codes. By doing so, it is possible to reduce the fluctuation of the average value of the output signal level of the controller, and it is convenient for performing code transmission with a small bit error rate even with a simple modulation method such as pulse amplitude modulation. Ah Furthermore, a non-modulation (single carrier) section for guaranteeing the AGC delay of the receiving device, and a preamble for establishing synchronization of the demodulator may be added before the information code, if necessary. That would be obvious.

In the above embodiment, the triple error correction code is applied to the unique word, the single error correction code is applied to the ID code, and the single parity check code is applied to the control code.
The present invention is not limited to this, and a code having a high error correction capability or a high error checking capability is provided in the order of a code for expressing the control content for the operation target, a code for identifying the controller, and a code for identifying the operation target. It should be obvious that it should be applied. Further, although the television and the garage opening / closing device have been described as the operation targets in the above-described embodiments, it is obvious that the present invention is not limited to this, and any object may be the operation target regardless of the degree of safety as described above. Let's do it. Further, although in the above-described embodiment, there is one controller capable of controlling each operation target, the present invention is, for example, in the controller of the receiving device, the ID of the controller permitting the control of the operation target to which the receiving device is attached. By registering a plurality of codes and comparing these codes with the ID code output from the extractor, in adding a game device or the like in which one operation target is remotely controlled by a plurality of controllers to the operation target. It will be convenient.

[0019]

As described above, according to the present invention, the code for expressing the control content for the operation target, the code for identifying the controller, and the code for identifying the operation target are in order of error correction capability or error checking capability. Since the error correction code or the error check code having a small code length is added to each code transmitted from the controller to the operation target by applying the code having a high transmission rate, it is possible to increase the transmission success rate of the code to be transmitted. In addition, since a code having a high error correction capability or an error check capability is added to the code for identifying the operation target, it is possible to prevent a mistake in selecting the operation target due to noise or the like with a high probability. Therefore, it is possible to control the total code length of the codes to be transmitted within a practical range by controlling the operation target with a low need to secure safety and the operation target with a high need to secure safety with one controller. This is effective in realizing the control device. Further, when transmitting the above three types of codes via a communication medium, the effects of burst errors can be reduced by appropriately combining the codes for identifying the controller and the codes for identifying the operation target in time series. If exclusive OR is performed with a specific code sequence so that the number of positive and negative bits can be made uniform, a simple modulation method such as pulse amplitude modulation can be adopted for the code to be transmitted. It is extremely effective in realizing a remote control device that is resistant to transmission errors.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a controller in a remote control device of the present invention.

FIG. 2 is a configuration diagram showing an embodiment of a receiving device in the remote control device of the present invention.

FIG. 3 is a configuration diagram showing a controller in a conventional remote control device.

FIG. 4 is a configuration diagram of a receiving device in a conventional remote control device.

[Explanation of Codes] 19 Keypad, 22 First Code Generator, 23
2nd code generator, 24 1st code generator, 25 2nd code generator, 26 3rd code generator, 27 3rd
Code generator, 28 code synthesizer, 32 operation target device, 33 receiving device, 36 extractor, 37 first
Decoder, 38 2nd decoder, 39 3rd decoder, 4
0 controller,

Claims (3)

[Claims] 1. A means for remotely controlling an operation target by transmitting an operation target identification code, a controller identification code, and a code indicating a control content to a plurality of operation targets by at least one controller via a communication medium. A remote control device, wherein an error correction code having a different error correction capability or an error check code having a different error check capability is applied to each of the code, the controller identification code, and the code indicating a control instruction. 2. The apparatus according to claim 1, wherein a controller identification code to which an error correction code or an error check code is applied and a code indicating a control instruction are combined in time series and transmitted through a communication medium. Remote control device characterized by. 3. The apparatus according to claim 1, wherein a controller identification code to which an error correction code or an error check code is applied and a code indicating a control instruction are exclusive ORed with a specific code sequence. A remote controller characterized by equalizing the number of positive and negative logic bits.