JP2003087158A - Information processing system, information processor, information processing method, recording medium and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a network in a house which is safe and can be conveniently constructed. SOLUTION: A high voltage outputting part 21 outputs an alternating current signal wherein the effective value to be supplied to an electric appliance in a house is higher than 100 V alternating current signal, for example, an alternating current signal whose effective value is 102 V. Similarly, a low voltage outputting part 22 outputs an alternating current signal, for example, the effective value of which is 98 V. A switch 23 switches and outputs the alternating current signals under control of a switch controlling part 24. Even though the switch controlling part 24 controls the switch 23 on the basis of data to be transmitted, when the data is 1, an output from the high voltage outputting part 21 is controlled so as to be outputted, and when the data is 0, an output from the low voltage outputting part 22 is controlled so as to be outputted respectively. A signal outputted from the switch 23 is superimposed on a signal of a power supply voltage to be supplied to the electric appliance and supplied to the electric appliance.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an information processing system,
The present invention relates to an information processing apparatus and method, a recording medium, and a program, and more particularly, to an information processing system, an information processing apparatus and method, a recording medium, and a program that are suitable for use when building a network.

[0002]

2. Description of the Related Art In recent years, it has been proposed that the facilities of the network are prepared and that the electrical appliances in the home are connected to build the network. By networking household electrical appliances, it is possible to perform centralized control and exchange data between electrical appliances, and if it is possible to connect to household networks from outside the household. A technology has been proposed that enables electric appliances installed inside the home to be controlled from outside the home.

In order to build a home network,
When electrical appliances are connected by wire, the wires have to be installed all over the home, which is troublesome and unsightly. Therefore, it has been proposed to use a power line to supply electric power to an electric appliance and supply data.

According to this method, a spread spectrum modulation signal or an OFDM (Orthogonal Frequency Division) is externally applied.
Ion Multiplex) Modulation signal is sent to the power line and commercial power line 1
It has been proposed to be transmitted within a range where 00 volts, 50 or 60 hertz is not affected.

[0005]

However, since the power line is designed to most efficiently transmit power with a signal having a frequency of 50 or 60 Hertz, a signal having a frequency other than 50 or 60 Hertz is Depending on the power factor capacitor and the power supply filter, there are problems that the impedance becomes extremely low (for example, 1 ohm or less), or LC resonance occurs with the inductance of the transformer.

Further, when the load is removed, the impedance becomes considerably high (for example, 100 ohms or more). In this way, it is possible to change from low impedance to high impedance depending on the situation. Therefore, in order to achieve communication stability, 90d
There was a problem that a dynamic range of B and a drive circuit that efficiently operates from a very low impedance to a high impedance are required, and a large power amplifier is required.

The present invention has been made in view of the above circumstances, and a home network can be constructed simply and safely by modulating a power supply voltage signal and transmitting data. The purpose is to do so.

[0008]

According to the information processing system of the present invention, the first information processing apparatus has a modulation means for modulating the voltage according to the data and the data modulated by the modulation means as the second information. The second information processing apparatus includes a supply unit that supplies the power supply voltage to the processing device, and an extraction unit that extracts data from the power supply voltage supplied by the supply unit, and a second information processing device based on the data extracted by the extraction unit. And an execution unit that executes a process.

The first information processing apparatus of the present invention comprises a modulation means for modulating the power supply voltage by switching the power supply voltage having different voltage values based on the data transmitted to another device.
And a supply unit that supplies the power supply voltage modulated by the modulation unit to another device.

The range between the maximum value and the minimum value of the power supply voltage is
It can be set within ± 5% of the voltage value when the power supply voltage is not modulated.

The modulation means may obtain power supply voltages having different voltage values from a device that generates the power supply voltage.

According to a first information processing method of the present invention, a power supply voltage having a different voltage value is switched based on data to be transmitted to another device to modulate the power supply voltage, and a modulation step is performed. And a supply control step of controlling supply of the power supply voltage to another device.

The program of the first recording medium of the present invention is
A modulation step that modulates the power supply voltage by switching power supply voltages of different voltage values based on data to be transmitted to another device, and a supply that controls the supply of the power supply voltage modulated by the processing of the modulation step to another device. And a control step.

A first program of the present invention is a modulation step of modulating a power supply voltage by switching power supply voltages of different voltage values based on data to be transmitted to another device, and a power supply modulated by the processing of the modulation step. And a supply control step for controlling supply of voltage to another device.

According to another aspect of the present invention, there is provided an information processing apparatus, wherein the input means for inputting the first power supply voltage modulated based on the data and the first power supply voltage input by the input means are not modulated. The present invention is characterized by including extraction means for extracting data by subtracting the power supply voltage of 2 and execution means for executing processing based on the data extracted by the extraction means.

The executing means may execute a process of controlling another connected device.

The extraction means supplies the second power supply voltage to the first power supply voltage.
It can be generated by calculating the average of the power supply voltage.

A second information processing method of the present invention is an input control step for controlling input of a first power supply voltage modulated based on data, and a first power supply whose input is controlled by the processing of the input control step. The method further includes an extraction step of extracting the data by subtracting the unmodulated second power supply voltage from the voltage, and an execution step of executing a process based on the data extracted by the process of the extraction step. To do.

The program of the second recording medium of the present invention is
An input control step that controls the input of the first power supply voltage that is modulated based on the data, and a second power supply voltage that is not modulated is subtracted from the first power supply voltage whose input is controlled in the processing of the input control step. By doing so, it is characterized by including an extraction step of extracting data and an execution step of executing processing based on the data extracted by the processing of the extraction step.

A second program of the present invention comprises an input control step for controlling the input of a first power supply voltage modulated based on data, and a first power supply voltage whose input is controlled by the processing of the input control step. , Causing the computer to execute an extraction step of extracting data by subtracting the unmodulated second power supply voltage and an execution step of executing processing based on the data extracted by the processing of the extraction step.

In the information processing system of the present invention, the first information processing apparatus modulates the voltage according to the data and supplies the modulated data together with the power supply voltage to be supplied to the second information processing apparatus. The second information processing device extracts data from the supplied power supply voltage and executes processing based on the extracted data.

A first information processing apparatus and method of the present invention,
In addition, in the program, the power supply voltage having a different voltage value is switched based on the data to be transmitted to the other device, so that the power supply voltage is modulated and supplied to the other device.

A second information processing apparatus and method of the present invention,
In the program, the data is extracted by subtracting the unmodulated power supply voltage from the power supply voltage modulated based on the data, and the processing based on the data is executed.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing the configuration of an embodiment of an information processing system to which the present invention is applied. The electric power generated by the power plant is transmitted to the transformer 2 via the distribution line 1. The transformer 2 reduces the voltage supplied to each home, i.e. 100 or 200 volts.

The power supply voltage transformed by the transformer 2 is supplied to each home through the lead-in wire 3. The power supply voltage supplied to each home is first supplied to the distribution board 11.
Normally, it is supplied to the distribution board 11 via a meter or the like,
Here, for convenience of description, the meter and the like will be omitted.

The distribution board 11 is composed of an ampere breaker, an earth leakage breaker, a distribution breaker (all not shown), etc., and is input to an electric light or an outlet installed in each room of the home. The distributed power supply voltage is distributed and supplied. Here, it is assumed that the power supply voltage from the distribution board 11 is supplied to the outlets 12-1 to 12-N.
A modem 13-1 is connected to the outlet 12-1, and a modem 13-2 is connected to the outlet 12-2.

Further, the modem 13-1 includes a refrigerator 14
However, the modem 13-2 has a television receiver 15
Each is connected. Here, the modem 13-1 and the refrigerator 14, the modem 13-2 and the television receiver 15
Although it is assumed that they are provided as separate bodies, for example, the configuration may be such that the modem 13-1 is built in the refrigerator 14.

In the following description, the outlet 12-1
12 to N are simply referred to as outlets 12 when it is not necessary to distinguish them individually. In addition, other devices will be described in the same manner. Further, for convenience of explanation, the refrigerator 14 and the television receiver 15 will be described as an example of the electric appliances, but other electric appliances may be connected to the modem 13.

In the present embodiment, the electrical appliances connected via the modem 13 can be controlled by the data supplied together with the power supply voltage. FIG. 2 shows a configuration example of a transmitter that transmits the data. When the transmitter 20 shown in FIG. 2 is installed in the distribution board 11 provided in each home, the electric appliances installed in each home can be controlled in each home.

Further, the transmitter 20 shown in FIG.
If it is installed before the distribution board 11 installed in each household of the apartment house such as an apartment, that is, between the transformer 2 and the distribution board 11, it is installed in each household of the apartment house. It is possible to control all appliances at once. In this way, the range of electrical appliances to be controlled differs depending on the place where the transmitter 20 is installed, and the transmitter 20 may be installed at an appropriate place according to the purpose.

The transmitter 20 includes a high voltage output section 21, a low voltage output section 22, a switch 23, and a switch control section 24.
It consists of Normally, the power supply voltage supplied to the home is an AC signal having a practical value of 100 volts. In the description of the present embodiment, a specific numerical value of voltage represents an actual value unless otherwise specified, and a power supply voltage supplied to a home is 100 volts.

The high voltage output section 21 outputs an AC signal having a voltage of 102 V with respect to 100 V.
The low voltage output unit 22 outputs an AC signal having a voltage of 98 volts. Thus, here, the one that outputs a high-voltage AC signal with respect to 100 V is the high-voltage output section 21, and the one that outputs a low-voltage AC signal is the low-voltage output section 22. High voltage output section 21 and low voltage output section 22
Therefore, the AC signals of the respective output voltages are AC signals of 50 or 60 Hertz synchronized with the power supply voltage (that is, a signal of 100 V) supplied to the home.

The voltage value (execution value) of the AC signal output from the high voltage output section 21 and the low voltage output section 22 is
The voltage values are not limited to 102 V and 98 V, respectively, and other voltage values may be used. However, the voltage value of the output AC signal may be any voltage, and is not limited to 102 V and 98 V. The voltage value of the AC signal output from each of the high-voltage output unit 21 and the low-voltage output unit 22 is the power supply voltage supplied to the electric appliance (in this case,
100V) within the range that does not affect, for example ±
It may be set within the range of 5% (hence, 95 to 105 volts).

The AC signal output from the high voltage output section 21 is supplied to the terminal a of the switch 23. The AC signal output from the low-voltage output unit 22 is the terminal b of the switch 23.
Is supplied to. The switch 23 switches the connection between the terminal a and the terminal b under the control of the switch control unit 24. The switch control unit 24 is, for example, a CPU (not shown).
Control of the switch 23 so as to generate data to be transmitted to an electric appliance connected via the modem 13 and to transmit the data by switching the switch 23. I do.

Here, the data transmitted to the electrical equipment is
In the data expressed in the binary system, the 102-volt AC signal output from the high-voltage output unit 21 indicates 1, and the 98-volt AC signal output from the low-voltage output unit 22 indicates 0.

The AC signal having an effective value of 102 volts output from the high voltage output section 21 and the AC signal having an effective value of 98 volts output from the low voltage output section 22 are transmitted by, for example, the transmitter 20 to the transformer. 2 (FIG. 1) and the like, it is possible to provide a tap on the coil on the secondary side and take it out from the tap.

FIG. 3 shows a simplified structure in the case where an AC signal is taken out from the tap. Secondary coil 3
1 is provided with three taps 32-1 to 32-3. At the position where the number of turns of the secondary coil 31 is the smallest as compared with the other taps 32, at the position where the tap 32-1 from which the AC signal having the effective value of 98 V is taken out is at the position where the number of turns is next smaller. A tap 32-2 for extracting an AC signal having an actual value of 100 V and a tap 32-3 for extracting an AC signal having an effective value of 102 V are provided at the winding end position of the secondary coil 31, respectively. .

The AC signal output from the tap 32-1 is output to the terminal a side of the switch 23, and the AC signal output from the tap 32-3 is output to the terminal b side of the switch 23.
Each is supplied. The output from the switch 23 is supplied to the modem 13-1 and the refrigerator 14.

A demodulation section for demodulating the data transmitted from the transmitter 20 is incorporated in the modem 13-1. FIG. 4 is a diagram showing an internal configuration example of the demodulation unit. The demodulation unit 50 shown in FIG. 4 includes a voltage output unit 51, an addition unit 52, a multiplication unit 53, and a determination unit 54. The voltage output unit 51 outputs an AC signal having an execution value of 100 V, which is the same as the power supply voltage supplied to the electric appliance, to the addition unit 52. The AC signal may be supplied from the distribution board 11 or may be generated by the voltage output unit 51, separately from the modulation signal from the transmitter 20.

When an AC signal is generated, for example, a PLL (Phase-Lo
By performing phase synchronization with the cked loop) and taking the average value of the modulation signal (therefore, in this case, 100 volts because it is the average value of 98 volt and 102 volt), an AC signal whose actual value is 100 volt is generated. It may be done.

The adder 52 also receives the modulated signal on which the data from the transmitter 20 is added. The adder 52 subtracts the AC signal from the voltage output unit 51 whose execution value is 100 V from the modulated signal from the transmitter 20. Adder 52
The output from is input to the multiplication unit 53. The output from the voltage output unit 51 is also input to the multiplication unit 53. Multiplier 5
3 is provided in order to synchronize the phase of the modulated signal output from the adder 52 with the reproduction carrier.

The output from the multiplication unit 53 is input to the determination unit 54. The determination unit 54 determines the sign of the output (modulated signal) from the input multiplication unit 53. That is, when it is positive, it is determined that the transmitted data is 1, and when it is negative, it is determined that the transmitted data is 0. By making such a determination, the binary data transmitted from the transmitter 20 can be demodulated.

Based on the data demodulated by the demodulation unit 50, the corresponding processing is executed in the electric appliance connected to the modem 13 including the demodulation unit 50. For example, in an emergency, processing such as displaying the emergency information on the television receiver 15 is executed.

As described above, the data is transmitted on the power supply voltage supplied to the electric appliance to be controlled and demodulated, in other words, two terminals having different voltages are provided, and one of them is provided. By making the data of 1 and the other 0 correspond to the data of the power line, and modulating at high frequency by switching the connection between the two terminals, and processing the modulated signal at the receiving side. For example, as compared with the method of injecting electric power using an active element, it is possible to suppress damage to electric appliances and provide a safe network.

Next, the signals that are actually transmitted and received when data is transmitted and demodulated in this way will be described. However, the waveforms of the signals shown below are examples, and the waveforms are not limited to the waveforms. FIG. 5 shows a signal output from the transmitter 20 shown in FIG.
When observed using a device that can observe waveforms such as an oscilloscope, the display 61 of the device is displayed.
It is a figure which shows the observation result displayed above. The observation result shown in FIG. 5 is a signal output from the switch 23.

The peaks and valleys are not smooth and are uneven, which means that the data is on this part. On the contrary, it shows that the smooth part has no data. As will be further described with reference to FIG. 6, in the present embodiment, an execution value output by the high-voltage output unit 21 in addition to an AC signal whose execution value is normally supplied to an electric appliance as a power supply voltage is 100 volts. There is an AC signal of 102 V and an AC signal of which the effective value output by the low voltage output unit 22 is 98 V.

The 102 volt AC signal and the 98 volt AC signal are output when the switch 23 is switched according to the data supplied to the electric appliance. When the switch 23 is switched, the AC signal is output. The signal is
As a result, instead of an AC signal of 100 V, an uneven signal is output, as shown by the bold line in the figure and like the peaks or valleys in FIG.

The observation result shown in FIG. 5 shows the case where the data is recorded only in the peaks or valleys.
It is of course possible to put data on the entire signal as shown in FIG.

When the demodulation unit 50 (FIG. 4) of the modem 11 which has received the AC signal on which the data is added performs the above-described processing, a signal as shown in FIG. 8 is output from the multiplication unit 53. To be done. The signal output from the multiplication unit 53 may be a signal that allows the determination unit 54 to determine the code, in other words, a signal that can determine whether the transmitted data is 0 or 1. The signal shown in FIG. 8 has an amplitude of −400.
The signal is mV to 400 mV.

This amplitude changes depending on the processing method of the multiplication unit 53, and is not limited to the signal of -400 mV to 400 mV.
It suffices to set the amplitude according to 4 so that the determination is easy. In the case of the signals shown in FIG. 8, the determination unit 54 may determine that the signal from 0 to 400 mV is 1, and the signal from −400 to 0 mV is 0.

FIG. 9 shows a configuration in which the transmitter 20 and the error detector 71 to which the signal output from the demodulation unit 50 is input are connected in order to compare the transmitted data with the demodulated data. FIG. First, a signal for comparing transmitted data and demodulated data with the configuration as shown in FIG. 9 will be described.

FIG. 10 is a diagram showing a signal of data transmitted from the transmitter 20. That is, the switch control unit 2
4 is a signal supplied to the No. 4. The signal shown in FIG. 10 is 1
And -1 are signals that can be switched. For example, when the signal is 1, the connection is switched to the terminal a side of the switch 23,
When it is 1, the switch control unit 24 controls the switch 23 so that the connection is switched to the terminal b side of the switch 23.

FIG. 11 shows a signal output from the demodulation section 50. In this case, the output from the determination unit 54 of the demodulation unit 50 is a signal in which 1 and -1 are switched. This is a signal for outputting 1 and -1 in order to match the signal of the data supplied to the switch controller 24, that is, the signal as shown in FIG. As described above, the signal output from the determination unit 54 may be a signal in which 1 and 0 are switched and is a matter that can be changed depending on the design.

To the error detector 71 (FIG. 9), the signal of the transmitted data as shown in FIG. 10 and the signal of the demodulated data as shown in FIG. 11 are input. By subtracting the other from the one, it is possible to detect the erroneous part. FIG. 12 is a diagram showing a signal indicating a subtraction result. The signal shown in FIG. 12 has an amplitude of 0, indicating that no error portion was detected, that is, the transmitted data was correctly demodulated.

As described above, even if data is transmitted by modulating the signal of the power supply voltage supplied to the electric appliance, as described above mainly with reference to FIGS.
It is possible to demodulate on the receiving side, and it can be confirmed that the operation of the electric appliance is not affected by the supply of the modulated power supply voltage.

As described above, if data is transmitted by modulating the signal of the power supply voltage supplied to the electric appliance, it is necessary to newly construct a network by wire to transmit the data. Without, it becomes possible to easily construct a home network.

The series of processes described above (for example, the modulation process) can be executed by hardware, but can also be executed by software. When a series of processes is executed by software, it is possible to execute various functions by installing a computer in which the programs that make up the software are built into dedicated hardware, or by installing various programs. The recording medium is installed in a general-purpose personal computer, for example.

FIG. 13 is a diagram showing an internal configuration example of a general-purpose personal computer. The CPU (Central Processing Unit) 101 of the personal computer is an RO
Various processes are executed according to a program stored in M (Read Only Memory) 102. RAM (Random A
In the ccess Memory) 103, data and programs necessary for the CPU 101 to execute various processes are appropriately stored. The input / output interface 105 is connected to an input unit 106 including a keyboard and a mouse, and outputs a signal input to the input unit 106 to the CPU 101. Further, the input / output interface 105 is also connected to an output unit 107 including a display and a speaker.

Further, the input / output interface 105 includes a storage section 108 including a hard disk,
Also, a communication unit 109 for exchanging data with other devices via a network such as the Internet is also connected. The drive 110 includes a magnetic disk 121, an optical disk 122, a magneto-optical disk 123, a semiconductor memory 12
It is used when reading or writing data from a recording medium such as No. 4 or the like.

As shown in FIG. 13, the recording medium is a magnetic disk 121 (including a flexible disk) and an optical disk 122 on which the program is recorded, which is distributed in order to provide the program to the user, separately from the personal computer. (CD-ROM (Compact Disc-Read Only Mem
ory), DVD (including Digital Versatile Disc)), magneto-optical disk 123 (including MD (Mini-Disc) (registered trademark)), or a package medium including a semiconductor memory 124, as well as a computer It is configured by a hard disk including a ROM 102 and a storage unit 108 in which a program is stored, which is provided to a user in a pre-installed state.

In the present specification, the steps for writing the program provided by the medium are not limited to the processing performed in time series according to the order described, but may be performed in parallel even if the processing is not necessarily performed in time series. Alternatively, it also includes processes that are individually executed.

In the present specification, the system means
It represents the entire apparatus composed of a plurality of devices.

[0063]

As described above, according to the information processing system of the present invention, the first information processing apparatus modulates the voltage according to the data and supplies the modulated data to the second information processing apparatus. The second information processing apparatus extracts data from the supplied power supply voltage and executes processing based on the extracted data, so that the network can be easily and safely connected. It is possible to build.

Further, according to the first information processing apparatus and method and the program of the present invention, the power supply voltage is modulated by switching the power supply voltage of different voltage value based on the data to be transmitted to another device. Since it is supplied to the device, it becomes possible to easily and safely transmit the data to the constructed network.

Further, according to the second information processing apparatus and method and the program of the present invention, the data is extracted by subtracting the unmodulated power supply voltage from the power supply voltage modulated based on the data, and the data is extracted. Since the processing based on the data is executed, it is easy and safe.
It becomes possible to execute processing based on the data from the constructed network.

[Brief description of drawings]

FIG. 1 is a diagram showing the configuration of an embodiment of an information processing system to which the present invention has been applied.

FIG. 2 is a diagram showing a configuration example of a transmitter 20.

FIG. 3 is a diagram showing another configuration example of a transmitter 20.

FIG. 4 is a diagram showing a configuration example of a demodulation unit 50.

5 is a diagram showing an example of a signal transmitted from the transmitter 20. FIG.

FIG. 6 is a diagram illustrating a signal on which data is placed.

FIG. 7 is a diagram showing an example of another signal transmitted from the transmitter 20.

8 is a diagram showing an example of a signal output from the demodulation unit 50. FIG.

FIG. 9 is a diagram showing a configuration example in which an error detector 71 is added.

FIG. 10 is a diagram showing an example of a signal transmitted as data.

FIG. 11 is a diagram showing an example of a demodulated signal.

12 is a diagram showing an example of a signal output from the error detector 71. FIG.

FIG. 13 is a diagram illustrating a medium.

[Explanation of symbols]

1 distribution line, 2 transformers, 3 drop lines, 11
Distribution board, 12 outlets, 13 modems, 2
0 transmitter, 21 high voltage output section, 22 low voltage output section, 23 switch, 24 switch control section, 5
0 demodulation unit, 51 voltage output unit, 52 addition unit, 5
3 multiplication unit, 54 determination unit

Claims (13)

[Claims] 1. An information processing system comprising a first information processing device for transmitting data and a second information processing device for receiving and processing the data, wherein the first information processing device comprises: Modulation means for modulating a voltage according to data; and the data modulated by the modulation means,
Supply means for supplying the power supply voltage to the information processing apparatus, and the second information processing apparatus, the extracting means for extracting the data from the power supply voltage supplied by the supplying means, and the extracting means. An information processing system, comprising: an executing unit that executes a process based on the data extracted by. 2. Modulating means for modulating the power supply voltage by switching power supply voltages having different voltage values based on data to be transmitted to another device; and the power supply voltage modulated by the modulating means, to the other device. An information processing device, comprising: 3. The range of the maximum value and the minimum value of the power supply voltage is ± of the voltage value when the power supply voltage is not modulated.
The information processing apparatus according to claim 2, wherein the information processing apparatus is set within 5%. 4. The information processing apparatus according to claim 2, wherein the modulation unit acquires the power supply voltages having the different voltage values from a device that generates the power supply voltage. 5. A modulation step of modulating the power supply voltage by switching power supply voltages of different voltage values based on data to be transmitted to another device, and the other of the power supply voltage modulated by the processing of the modulation step. And a supply control step of controlling supply to the device. 6. A modulation step of modulating the power supply voltage by switching power supply voltages of different voltage values based on data to be transmitted to another device, and the other of the power supply voltage modulated by the processing of the modulation step. And a supply control step for controlling supply to the device. 7. A modulation step of modulating the power supply voltage by switching power supply voltages of different voltage values based on data to be transmitted to another device, and the other of the power supply voltage modulated by the processing of the modulation step. And a program for causing a computer to execute a supply control step for controlling the supply to the device. 8. Input means for inputting a first power supply voltage modulated based on data, and subtracting an unmodulated second power supply voltage from the first power supply voltage input by the input means. By
An information processing apparatus comprising: an extraction unit that extracts the data, and an execution unit that executes a process based on the data extracted by the extraction unit. 9. The execution unit executes a process of controlling another device connected thereto.
The information processing device according to 1. 10. The information processing apparatus according to claim 8, wherein the extraction unit generates the second power supply voltage by calculating an average of the first power supply voltage. 11. An input control step for controlling an input of a first power supply voltage modulated based on data, and the first power supply voltage whose input is controlled in the processing of the input control step, is not modulated. An information processing method comprising: an extraction step of extracting the data by subtracting a second power supply voltage; and an execution step of executing a process based on the data extracted by the process of the extraction step. . 12. An input control step for controlling an input of a first power supply voltage modulated based on data, and the first power supply voltage whose input is controlled in the processing of said input control step, is not modulated. Read by a computer comprising: an extraction step of extracting the data by subtracting a second power supply voltage; and an execution step of executing a process based on the data extracted by the process of the extraction step. A recording medium in which possible programs are recorded. 13. An input control step for controlling an input of a first power supply voltage modulated based on data, and the first power supply voltage whose input is controlled in the processing of the input control step is not modulated. A program that causes a computer to execute an extraction step of extracting the data by subtracting a second power supply voltage and an execution step of executing a process based on the data extracted by the process of the extraction step.