JP2003333673A - Mobile communication terminal, remote control method and remote control system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile communication terminal, a remote control method and a remote control system in which remote control is made possible without malfunction or erroneous operation. <P>SOLUTION: In a mobile telephone equipment 10, a tone signal corresponding to a remote control code is detected from a remote control signal received from a remote control apparatus 40 via a public telephone switched network 20 by a tone detecting part 15 and in response to the tone signal, a control part 13 transmits an infrared remote control signal corresponding to the remote control code from an infrared transmitting part 12 to a device 30 to be controlled. The device 30 to be controlled receives infrared rays in an infrared receiving part 31, operates in accordance with the remote control code and displays its detailed operating status on a display part 32. An image on the display part 32 is photographed by a photographing part 11 and a resultant video signal is transmitted to the remote control apparatus 40 via a radio part 14 and the public telephone switched network 20. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication terminal, a remote control method and a remote control system, and more particularly to a mobile communication terminal having a function of performing remote control using infrared rays, and a remote control using the mobile communication terminal. A method and a remote control system.

[0002]

2. Description of the Related Art Conventionally, a portable telephone device having a remote control function (hereinafter, also referred to as an "infrared remote controller") using infrared rays has been known. Such a portable telephone device with an infrared remote controller function is a simple infrared device. Used as a remote control device (for example, Japanese Patent Laid-Open No. 2001-309288,
JP-A-11-341171).

However, in the above-mentioned portable telephone device with an infrared remote control function, the distance between the controlled device to be remotely controlled and the portable telephone device is limited to a relatively short distance at which infrared rays can reach at a predetermined level or higher. It cannot be remotely controlled from a place away from the controlled device (for example, whereabouts). Therefore, in recent years, a remote control system has been proposed that can be remotely controlled even from a place remote from the controlled device (for example, Japanese Patent Laid-Open No. 2001-275172).

In this remote control system, the near infrared remote controller receives a command input from another communication terminal capable of communicating with a communication terminal connected to the near infrared remote controller,
It is configured to have a control circuit that generates a remote control signal for an electric device and a light emitting unit that emits a pulse light by converting the remote control signal into near infrared rays. According to this remote control system, the user can connect the near-infrared remote controller with the communication terminal in a state in which the light emitting unit is located within the line-of-sight distance from the electric device to be controlled, and the line-of-sight of the electric device Even from a remote place that is far from the distance, the communication terminal can remotely control the electric device.

Also, a remote control system has been known in the prior art in which remote control of a video deck can be performed remotely from a remote location, such as a place where the user is away from, in accordance with a change in program time. Gazette). This remote control system includes a wireless telephone that adds a video control signal transmission unit that emits infrared rays to remotely control a VCR, and a mobile telephone that is connected to this wireless telephone via a wireless telephone line. The configuration is such that a communication protocol for operating the video control signal transmission unit is provided between the wireless telephone and the mobile telephone in response to an input signal from the mobile telephone.

On the other hand, if the mobile phone device generates a remote control signal in response to an input from the operation key of the mobile phone device, it is difficult to use the mobile phone device as a remote controller for devices that are complicated to operate. Since there is a problem, a mobile phone device configured to solve this problem has been conventionally known (Japanese Patent Laid-Open No. 2001-36652). This conventional mobile phone device stores a control unit that stores external control information regarding control of a controlled device, and an external control signal generated based on the external control information stored in the storage unit to the controlled device. The external control signal transmitting means for transmitting is provided.

[0007]

However, in the above-mentioned conventional portable communication terminals such as the portable telephone device and the remote control system, the controlled device is only unilaterally remotely controlled from the portable telephone device. It is possible to confirm whether the controlled device that is remotely controlled via the mobile phone device is operated by the remote control device that is connected to the mobile phone device via the line, and is operated in the state intended by the operator of the operation device. Can not.

Further, even if the portable telephone device malfunctions, the operator of the operating device cannot confirm it. Especially when complicated operations such as changing the absence reservation of the VCR are required, it is necessary to rely on memory to perform operations.
As a result, there is a problem that the operation procedure cannot be understood in the middle of the operation or an erroneous operation is likely to occur.

Conventionally, a remote control system capable of performing remote control while watching a monitor image of a controlled device is also known (Japanese Patent Laid-Open Nos. Hei 7-162843 and 2001-2382).
73, JP-A-10-215388). For example, in Japanese Unexamined Patent Publication No. 2001-238273, a home device control device that outputs a remote control signal that controls a home device that is a controlled device includes a camera, and a video signal obtained by photographing the operating state of the home device with the camera is disclosed. There is disclosed a remote control system configured to output and send to an operation terminal via a public line, and the operation terminal controls a home device control device via the public line. However, in these conventional remote control systems, since the operation of the home device is confirmed based on the video signal captured by the camera, the general state of the home device at the present moment can be known, but details of the operation such as absence reservation can be obtained. Since it is not possible to understand the abnormal state, it is insufficient to prevent malfunctions and malfunctions.

The present invention has been made in view of the above points,
A mobile communication terminal capable of remote control without malfunction or malfunction
An object is to provide a remote control method and a remote control system.

[0011]

In order to achieve the above object, a portable communication terminal of the present invention comprises a wireless unit for communicating with a remote control device via a network and a remote control device received by the wireless unit. A tone detection unit that detects a tone signal corresponding to the remote control code from the transmitted remote control signal, a transmission unit that transmits a remote control signal to the controlled device and remotely controls the controlled device, and an operating state of the controlled device. Based on the tone signal detected by the tone detection unit and the image capturing unit that captures a video signal from the display unit of the controlled device, the transmission unit generates a remote control signal corresponding to the remote control code indicated by the remote operation signal. , And a control unit for converting a video signal photographed by the photographing unit into image data and transmitting the image data to the remote control device via the wireless unit.

According to the present invention, the controlled device can be remotely controlled based on the remote control code based on the remote control signal from the remote control device, and the operating state image of the controlled device displayed on the display section of the controlled device is displayed. Can be photographed by the photographing unit and transmitted to the remote control device.

Further, in order to achieve the above object, the portable communication terminal of the present invention further comprises sound collecting means for collecting the sound output from the sound output means indicating the operating state of the controlled device, The control unit is characterized by converting a voice signal obtained by collecting sound by the sound collecting unit into voice data and transmitting the voice data to the remote control device via the wireless unit.

According to the present invention, the controlled device can be remotely controlled based on the remote control code based on the remote control signal from the remote control device, and the operating state image of the controlled device displayed on the display unit of the controlled device is displayed. And the voice of the operating state of the controlled device output from the voice output means can be transmitted to the remote control device.

Further, in order to achieve the above object, in the remote control method of the present invention, a mobile communication terminal that communicates with a remote control device via a line network is based on a remote control signal transmitted from the remote control device. A remote control method for remotely controlling the controlled device, wherein the mobile communication terminal automatically responds to a call from the remote operation device and connects the line between the remote operation device and the mobile communication terminal, The second step of detecting a tone signal corresponding to the remote control code from the remote control signal from the remote control device, and based on the tone signal,
A third step of remotely controlling the controlled device by generating a remote control signal corresponding to the remote control code indicated by the remote control signal and transmitting the remote control signal to the controlled device, and the controlled device indicating the operating state of the controlled device. A fourth step of photographing the display unit to obtain a video signal and transmitting the video signal to the remote control device via the network.

According to the present invention, the controlled device can be remotely controlled based on the remote control code based on the remote control signal from the remote control device, and the operating state image of the controlled device displayed on the display section of the controlled device is displayed. The video signal obtained by photographing can be transmitted to the remote control device.

Further, in order to achieve the above object, in the remote control method of the present invention, a portable communication terminal that communicates with a remote control device via a line network is based on a remote control signal transmitted from the remote control device. A remote control method for remotely controlling a controlled device that displays an operating state on a display unit and outputs a voice from a voice output means, wherein the mobile communication terminal automatically responds to a call from the remote control device. The first step of connecting the line between the mobile communication terminal and the mobile communication terminal, the second step of detecting a tone signal from the remote operation signal from the remote operation device, and the remote control code indicated by the remote operation signal based on the tone signal A remote control signal is generated and transmitted to the controlled device to remotely control the controlled device.
And a video signal is obtained by photographing the display section of the controlled device indicating the operating state of the controlled device, and the audio output of the audio output unit indicating the operating state of the controlled device is collected to output the audio signal. And a fourth step of transmitting the video signal and the audio signal to the remote control device via the network.

According to the present invention, the controlled device can be remotely controlled based on the remote control code based on the remote control signal from the remote control device, and the controlled device collects the voice output from the voice output means indicating the operating state. The audio signal obtained by sounding and the video signal obtained by photographing the display unit of the controlled device, which shows the operating state of the controlled device, can be transmitted to the remote control device.

In order to achieve the above object, the remote control system of the present invention has a controlled device for displaying an operating state on the first display section and a remote controller for causing the controlled device to perform a desired operation. A remote control device that transmits a tone signal indicating a code as a remote control signal and displays an image based on the received video signal on the second display unit, and a remote control signal transmitted from the remote control device through a network. Then, a tone signal is detected from the remote control signal, a remote control signal corresponding to the remote control code is generated and transmitted to the controlled device to remotely control the controlled device, and the first display section of the controlled device is displayed. The mobile communication terminal is configured to transmit a video signal captured by the capturing unit to the remote control device via the network.

According to the present invention, the controlled device can be remotely controlled based on the remote control code based on the remote control signal from the remote control device and the operation of the controlled device displayed on the first display section of the controlled device. A video signal obtained by photographing the image of the state by the photographing unit can be transmitted to the remote control device.

In order to achieve the above-mentioned object, the remote control system of the present invention displays the operating state on the first display section and outputs the voice by the first voice output means, and the controlled device. A tone signal indicating a remote control code for causing the device to perform a desired operation is transmitted as a remote control signal, an image based on the received video signal is displayed on the second display unit, and a voice based on the received audio signal is transmitted to the second display unit. The remote control device for outputting by the voice output means and the remote control signal transmitted from the remote control device are received through the line network, the tone signal is detected from the remote control signal, and the remote control signal corresponding to the remote control code is received. A video signal generated and transmitted to the controlled device to remotely control the controlled device, and a video signal obtained by photographing the first display unit of the controlled device by the photographing unit,
It is configured to have a mobile communication terminal that transmits a voice signal obtained by collecting the voice output from the first voice output means of the controlled device to the remote control device via the line network. .

According to the present invention, the controlled device can be remotely controlled based on the remote control code based on the remote control signal from the remote control device, and the operating state image of the controlled device displayed on the display unit of the controlled device is displayed. And the voice of the operating state of the controlled device output from the voice output means can be transmitted from the mobile communication terminal to the remote control device via the line network.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a block diagram of an embodiment of a mobile communication terminal according to the present invention. In the figure,
A mobile phone device 10 with an infrared remote control function, which is an embodiment of a mobile communication terminal, includes a photographing unit 11 for photographing a remote controlled device and an infrared transmission unit for outputting a remote control signal (remote control signal) for transmitting infrared rays. 12, a control unit 13 that controls each unit in the mobile phone device 10, a wireless unit 14 that wirelessly communicates with a base station (not shown), and a wireless unit 14
The tone detection unit 15 detects a signal (tone) from the device and converts it into remote control data.

In this portable telephone device 10, a signal (tone) from the radio section 14 is detected by the tone detection section 15, converted into remote control data, and then processed by the control section 13.
Converted to infrared remote control signal. The infrared remote controller control signal obtained by the control unit 13 is the infrared transmission unit 1
2 is supplied to a controlled device (not shown) as an infrared remote control signal, which is controlled by the received tone signal.

On the other hand, in parallel with this, the photographing section 11 photographs the controlled device, and the video signal obtained thereby is taken by the control section 1.
Supply to 3. The control unit 13 converts the input video signal into image data, and transmits the obtained image data to the terminal of the operator of the remote control via the wireless unit 14 via the public telephone line network 20. The public telephone line network 20 itself is well known to those skilled in the art, and since it is not directly related to the gist of the present invention, detailed description thereof will be omitted.

Of course, the mobile phone device 10 having such a configuration can perform the original telephone communication with the other terminal via the public telephone line network 20, the mobile phone network (not shown), or the like.
It is possible to control the operation of the controlled device by infrared rays according to an instruction from a remote terminal located at a remote place via the public telephone line network 20.

FIG. 2 shows a system configuration diagram of an embodiment of a remote control system according to the present invention. In the figure, the same components as those in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted. In FIG. 2, a mobile phone device 10 with an infrared remote control function
The controlled device 30 whose operation is controlled by an infrared remote control signal from the device is within a range where the infrared light from the mobile phone device 10 with an infrared remote control function can reach, and the display unit 32 of the controlled device 30 by the imaging unit 11. It is installed at a position where you can shoot.

The controlled device 30 has at least an infrared receiving section 31 and a display section 32, and the infrared receiving section 31.
It has a control unit and an operation unit for performing a predetermined operation according to the remote control code based on the remote control signal received by. Further, the controlled device 3 is displayed on the display unit 32.
The operation state of 0 itself is displayed in detail.

On the other hand, a remote control device 40 is provided at a remote place away from the portable telephone device 10 having the infrared remote control function. The remote control device 40 is the public telephone line network 20.
It has a wireless unit 41 connectable with, a display unit 42, a control unit 43 for controlling the apparatus, and an operation unit 44 operated by an operator.

Next, regarding the operation of the embodiment shown in FIG.
Description will be made with reference to the sequence diagram of FIG. Now, it is assumed that the mobile phone device 10 with an infrared remote control function is in a standby state. When the operator operates the operation unit 44 of the remote control device 40 to call the mobile phone device 10 with the infrared remote control function (step 10 in FIG. 3).
1), the control unit 43 converts into a tone signal having contents corresponding to the calling operation, and transmits the tone signal to the infrared remote control portable telephone device 10 via the wireless unit 41 and the public telephone network 20. Call (step 1 in FIG. 3)
02).

Mobile phone unit 10 with infrared remote control function
Transmits a call signal from the remote control device 40 to the wireless unit 14.
When the control unit 13 detects that the received signal is a call through the tone detection unit 15, the control unit 1
3 automatically responds via the wireless unit 14 and the public telephone line network 20 to establish a line connection with the remote control device 40 according to a predetermined protocol to start communication (step 10 in FIG. 3).
3).

In this communication enabled state, the operator inputs an operation signal for causing the controlled device 30 to perform a desired operation through the operation unit 44 of the remote operation device 40 (step 104 in FIG. 3), and the operation is performed. The signal is converted into a tone signal of a remote control code corresponding to the operation content by the control unit 43, and then transmitted from the wireless unit 41 to the mobile telephone device 10 via the public telephone network 20 (step 105 in FIG. 3). .

When the control section 13 of the portable telephone device 10 identifies that the tone signal received by the radio section 14 and detected by the tone detection section 15 and input is the tone signal of the remote control code, the remote control code is changed to the remote control code. It is converted into a corresponding infrared control signal and supplied to the infrared transmission section 12, from which a remote control signal (remote control signal) corresponding to the received remote control code is transmitted to the controlled device 30 by infrared rays (step 106 in FIG. 3).

The controlled device 30 receives the infrared rays by the infrared receiving section 31 and demodulates the remote control code. Based on the remote control code, a predetermined operation section operates to perform an operation corresponding to the remote control code. The operating state is displayed on the display unit 32. The image of the operating state displayed on the display unit 32 is photographed by the photographing unit 11 of the mobile phone device 10 (step 107 in FIG. 3), and the video signal obtained thereby is converted into image data by the control unit 13. After that, the data is transmitted to the remote control device 40 via the wireless unit 14 and the public telephone line network 20 (step 108 in FIG. 3).

After this image data is received by the wireless unit 41 of the remote control device 40, it is displayed on the display unit 42 via the control unit 43 to allow the operator to confirm the operating state of the controlled device 30. Can be performed (step 10 in FIG. 3)
9). As described above, in the present embodiment, the controlled device 3 is controlled while the imaging unit 11 is remotely controlling the controlled device 30.
Since the image of the display unit 32 of 0 is photographed, the video signal thus obtained is transmitted to the operator of the remote control via the public telephone line network 20, and is displayed on the display unit 42 of the remote control device 40. The remote control can be performed while confirming the current state of the controlled device 30 with the image.

In the prior art, since the appearance of the controlled device 30 is simply photographed, it is possible to confirm the on / off state of the device power of the controlled device 30 with a power lamp, and to turn on / off the lighting. Although a simple operation state can be confirmed, a detailed operation state of the controlled device 30, for example, when the controlled device 30 is a VTR, a detailed setting state of how the answering machine is recorded and a current detailed operation state. Can't confirm until. On the other hand, in the present embodiment, the controlled device 3
Since the image capturing unit 11 captures an image of the display unit 32 that displays the operating state of 0 in detail, the operating state of the controlled device 30 can be confirmed in detail, and complicated operations such as changing an absence reservation can be performed accurately. Therefore, it is possible to prevent malfunctions and malfunctions of the device.

Next, another embodiment of the present invention will be described. FIG. 4 shows a system configuration diagram of another embodiment of the remote control system according to the present invention. 2, those parts which are the same as those corresponding parts in FIG. 2 are designated by the same reference numerals, and a description thereof will be omitted. In the present embodiment, the mobile phone device 16 with the infrared remote control function is the mobile phone device 10 with the infrared remote control function of FIG.
A microphone 17 is added to the controlled device 33.
2 has a configuration in which a speaker 34 is added to the controlled device 30 in FIG. 2, and the remote operation device 45 has a configuration in which a speaker 46 is added to the remote operation device 40 in FIG.

In FIG. 4, the controlled device 33 receives the infrared rays sent from the infrared sending section 12 of the portable telephone apparatus 16 and modulated by the remote control code in the infrared receiving section 31, demodulates the remote control code, and controls the remote control. Based on the code, a predetermined operation unit operates to perform an operation corresponding to the remote control code, the operation state is displayed on the display unit 32, and the operation state is output from the speaker 34 by voice.

The operation state displayed on the display unit 32 is photographed by the photographing unit 11 of the portable telephone device 16, and the video signal obtained thereby is converted into image data by the control unit 18, while the speaker 34 outputs the image data. The voice is picked up by the microphone 17 of the mobile phone device 16, acoustic-electrically converted into a voice signal, supplied to the control unit 18, and converted into voice data. Subsequently, the control unit 18 multiplexes the above-mentioned image data and audio data, and then transmits them to the remote control device 45 via the wireless unit 14 and the public telephone line network 20.

Of the image data and voice data received by the wireless unit 41 of the remote control device 45, the image data is displayed on the display unit 42 via the control unit 47, and the operating state of the controlled device 30 is displayed to the operator. Is confirmed by the image display,
On the other hand, the audio data is converted into an analog audio signal by the control unit 47 and is electro-acoustic converted by the speaker 46,
It is pronounced as a voice.

As described above, according to the present embodiment, the controlled device 33 is controlled while the controlled device 33 is being remotely controlled.
While capturing the image of the display unit 32, the voice indicating the operation state produced from the speaker 34 is picked up, and the video signal and the voice signal thus obtained are sent to the remote control operator via the public telephone line network 20. Then, it is displayed on the display section 42 of the remote control device 45 and at the same time sounded from the speaker 46. Therefore, in addition to confirmation by the image of the current state of the controlled device 33, the current state of the controlled device 33 It is possible to remotely control while confirming by voice.

As a result, according to the present embodiment, even a visually handicapped person can easily operate, and a warning sound or the like can be immediately notified of an undisplayable state or an emergency state. is there.

The present invention is not limited to the above-described embodiment, and for example, a radio telephone device is assumed as the remote control devices 40 and 45, but the present invention is not limited to this, and a function for transmitting a tone. Also, a wired telephone device having a function of displaying an image or a sound that has been sent may be used. Further, in the above embodiment, the remote control signal is transmitted by infrared rays, but it may be converted into ultrasonic waves and transmitted (a configuration using ultrasonic remote control signals may be used).

[0044]

As described above, according to the present invention,
A video signal obtained by photographing the image of the operating state of the controlled device by the photographing unit, which is displayed on the display unit of the controlled device that is remotely controlled based on the remote control code based on the remote control signal from the remote control device, Since it is sent to the remote control device, you can check the operating status of the controlled device in detail based on the image of the display that shows the operating status of the controlled device in detail, and you can perform complicated operations such as changing your absence. Can also be done accurately.

Further, according to the present invention, the operation of the controlled device displayed on the display section of the controlled device for remotely controlling the controlled device based on the remote control code based on the remote control signal from the remote control device. Since the mobile communication terminal transmits the image of the state and the voice of the operating state of the controlled device output from the voice output means of the controlled device to the remote operating device, the remote operating device side controls the controlled device. The operation status of the controlled device can be grasped in detail by the image, and the operation status of the controlled device can also be grasped by voice, which makes it easy for a visually handicapped person to operate remotely, and the warning sound cannot be displayed on the image. You can also check the status, and you can also immediately check the state that can be dealt with urgently.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of a mobile communication terminal of the present invention.

FIG. 2 is a system configuration diagram of an embodiment of a remote control system of the present invention.

FIG. 3 is a sequence diagram for explaining the operation of FIG.

FIG. 4 is a system configuration diagram of another embodiment of the remote control system of the present invention.

[Explanation of symbols] Mobile phone device with infrared remote control function 11 Imaging Department 12 Infrared transmitter 13, 18, 47 Control unit 14, 41 Radio section 15 Tone detector 17 Mike 20 public telephone line network 30, 33 Controlled device 31 Infrared receiver 32, 42 display 34, 46 speakers 40, 45 Remote control device 44 Operation part

Continued front page    F-term (reference) 5C054 AA01 AA05 CA04 CC02 EA01                       EA03 EA05 HA17                 5C056 AA05 AA07 BA08 CA02 CA06                       CA13 CA19 DA08 DA11                 5K048 AA04 AA09 BA02 DB04 DC01                       EB02 EB14 EB15 FB02 FB05                       FB11 HA01 HA02                 5K067 AA34 BB04 BB28 DD02 DD11                       DD52 EE02 EE37 FF02 FF23                 5K101 KK11 LL11 NN02 NN12 NN18                       NN36 UU03

Claims (6)

[Claims] 1. A radio unit for communicating with a remote control device via a network, and a tone for detecting a tone signal corresponding to a remote control code from a remote control signal received by the radio unit and transmitted by the remote control device. A detection unit, a sending unit that transmits a remote control signal to the controlled device to remotely control the controlled device, and a display unit of the controlled device that indicates an operating state of the controlled device, and captures a video signal. An image captured by the image capturing unit and an image captured by the image capturing unit, in which the remote control signal corresponding to the remote control code indicated by the remote operation signal is generated by the transmitting unit based on the tone signal detected by the tone detecting unit. A mobile communication terminal, comprising: a control unit that converts a signal into image data and transmits the image data to the remote operation device via the wireless unit. 2. The controlled device further comprises sound collecting means for collecting the sound output from the sound output means indicating the operating state, and the control section obtains sound by the sound collecting means. The mobile communication terminal according to claim 1, wherein a voice signal is converted into voice data and is transmitted to the remote operation device via the wireless unit. 3. A remote control method, wherein a mobile communication terminal, which communicates with a remote control device via a network, remotely controls a controlled device based on a remote control signal transmitted from the remote control device, From the remote operation signal from the remote operation device, a first step in which the mobile communication terminal automatically responds to a call from the remote operation device to connect a line between the remote operation device and the mobile communication terminal; A second step of detecting a tone signal corresponding to the remote control code, and generating a remote control signal corresponding to the remote control code indicated by the remote operation signal based on the tone signal and transmitting the remote control signal to the controlled device, A third step of remotely controlling the controlled device; photographing a display unit of the controlled device showing an operating state of the controlled device to obtain a video signal; Remote control method, which comprises a fourth step of transmitting to the 隔操 operation device. 4. A mobile communication terminal, which communicates with a remote control device via a network, displays an operating state on a display unit based on a remote control signal transmitted from the remote control device and outputs a voice from a voice output means. A remote control method for remotely controlling a controlled device for outputting, comprising: connecting a line between the remote operation device and the mobile communication terminal by the mobile communication terminal automatically responding to a call from the remote operation device. 1), a second step of detecting a tone signal corresponding to the remote control code from the remote control signal from the remote control device, and a remote control corresponding to the remote control code indicated by the remote control signal based on the tone signal. A third step of generating a control signal and transmitting the control signal to the controlled device to remotely control the controlled device; and the controlled device indicating an operating state of the controlled device. A video signal is obtained by photographing the display section of the device, the voice output of the voice output means indicating the operating state of the controlled device is picked up to obtain a voice signal, and the video signal and the voice signal are transmitted through the line. And a fourth step of transmitting to the remote control device via a network. 5. A controlled device for displaying an operating state on a first display unit, and a tone signal indicating a remote control code for causing the controlled device to perform a desired operation, as a remote control signal,
A remote control device for displaying an image based on the received video signal on the second display unit, and receiving the remote control signal transmitted from the remote control device via a network, and outputting the tone signal from the remote control signal. A remote control signal corresponding to the detected remote control code is generated and transmitted to the controlled device to remotely control the controlled device, and the first display unit of the controlled device is photographed by a photographing unit. A remote control system comprising: a mobile communication terminal that transmits the video signal obtained in this way to the remote control device via the line network. 6. A controlled device that displays an operating state on a first display unit and outputs a sound by a first audio output means, and a tone indicating a remote control code for causing the controlled device to perform a desired operation. Send the signal as a remote control signal,
A remote operation device that displays an image based on the received video signal on the second display unit and outputs a sound based on the received audio signal by the second audio output means, and the remote operation signal transmitted from the remote operation device. Is received via a network, the tone signal is detected from the remote control signal, a remote control signal corresponding to the remote control code is generated and transmitted to the controlled device, and the controlled device is remotely controlled. At the same time, the video signal obtained by photographing the first display portion of the controlled device by the photographing portion and the sound output from the first sound output means of the controlled device are collected and obtained. A remote control system, comprising: a mobile communication terminal that transmits a voice signal to the remote control device via the network.