JPH09214941A - Monitor information processing device and remote monitoring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a monitor information possessing device with which monitor information can be supplied only to a monitoring person without utilizing a call setting information. SOLUTION: At a monitor information possessing device 2, a network interface part 60 sets a communication line corresponding to a call setting request from a monitoring device 1. After the communication line is set, an access managing part 62 measures a fixed period and compares a password received from the monitoring device 1 with an internally set present password. When these passwords are coincident, a CPU 61 changes over a switch 66 and transmits image/voice information inputted by a monitor information input part 24 to the monitoring device 1. When the passwords are not coincident or when the passwords are not compared within that fixed period, the communication line is disconnected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a monitoring information acquisition device for transmitting input monitoring information to a remote monitoring device via an ISDN network (service integrated digital communication network), and the monitoring information acquisition device. It relates to a distance monitoring system.

[0002]

2. Description of the Related Art In a remote monitoring system in which a monitoring information acquisition device installed at a monitoring point and a monitoring device installed on the observer side are connected by an ISDN line, the monitoring device is sent from the monitoring information acquisition device. By receiving and reproducing the monitoring information representing images and sounds, the monitoring information is provided to the monitoring person. The monitoring information acquisition device has a function of preventing a person other than the monitoring person from extracting the monitoring information. For example, the device disclosed in Japanese Patent Laid-Open No. 2-155350 has a ISD
When the calling subscriber number and the calling subaddress included in the call setup message of the N network do not match those set in advance, the incoming call is rejected, so that the management information is transmitted only to a specific monitoring device. The calling subscriber number is determined by the subscriber line (terminating device) of the ISDN network to which the device that originates the call is connected.

[0003]

In the above prior art,
Since the monitoring information acquisition device protects the monitoring information based on the call setup information such as the calling subscriber number, the subscriber line to which the monitoring device can be connected is limited. That is, the monitoring device cannot be used for a plurality of subscriber lines, or the arrangement cannot be changed and used for another subscriber line.

Therefore, an object of the present invention is to provide a monitoring information acquisition device which supplies monitoring information only to a monitoring person without using call setting information.

Another object of the present invention is to provide a distance monitoring system using the monitoring device.

[0006]

In order to achieve the above object, the present invention is a monitoring information acquisition device connected to a monitoring device by an ISDN line, and input means for capturing monitoring information representing images and sounds, An encoding unit that encodes the captured monitoring information, a communication unit that receives the call setting information from the monitoring device side and starts transmitting and receiving information to and from the monitoring device, Detecting means for detecting the password from the information, determining means for determining whether or not the detected password matches a predetermined value determined in advance, and when it is determined that they match, the encoded monitoring information Is provided from the communication means to the monitoring device. The device according to the present invention detects a password received subsequent to the call setting information, and transmits the monitoring information only when the detected password matches a predetermined value known to the monitor. That is, the monitoring information can be supplied only to the monitoring person without using the received call setting information.

Further, the present invention is a remote monitoring system comprising the above-mentioned monitoring information acquisition device and a monitoring device connected to the monitoring information acquisition device by an ISDN line, wherein the monitoring device is the monitoring information. Communication means for transmitting and receiving information to and from the acquisition device, means for accepting a password from a monitor, means for transmitting the accepted password from the communication means, and decoding of the monitor information received by the communication means , And means for reproducing the image and the sound obtained by the decoding. In the system according to the present invention, since the monitoring information acquisition device determines whether or not the monitoring information can be transmitted by the password, the monitoring device can be connected to any subscriber line of the ISDN network.

[0008]

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 block diagram of a distance monitoring system according to an embodiment of the present invention. The remote monitoring system is a system in which a monitoring device 1 installed on the observer side and a monitoring information acquisition device 2 installed at a monitoring point are connected by an ISDN network 3. The monitoring information acquisition device 2 includes a video camera 21 and
The microphone 22 and the monitoring information transmitting device 23 are provided, and the monitoring information including the image data and the audio data of the monitoring target is transferred to the ISD.
It is transmitted to the monitoring device 1 through the N network 3. The monitoring device 1
The display 11, the speaker 12, and the monitoring information receiving device 13 are provided, and the monitoring information transmitted from the monitoring information acquisition device 2 is received and reproduced. As shown in the figure, in this remote monitoring system, the monitoring information acquisition device 2 can be connected to an arbitrary number of subscriber lines of the ISDN network. Similarly, the monitoring device 1 can be connected to a plurality of arbitrary subscriber lines, and can be transported and connected to another subscriber line.

FIG. 2 shows the configurations of the monitoring device 1 and the monitoring information acquisition device 2.

The monitoring information receiving device 13 in the monitoring device 1 is
A network interface / line control unit 50 that controls communication with the ISDN network 3, a CPU 51 that controls each unit of the monitoring information receiving device 13, a memory unit 52 that stores a control program and received data, and a separation of received frames. And a multimedia demultiplexing unit 53 for converting the transmission speed, a key input unit 54, a buffer 55, an image / audio codec 56 for decoding the received image data and audio data, and outputting the decoded data to management information. It has a signal conversion unit 57 for converting the signal of the unit 14. The management information output unit 14
Corresponds to the display 11 and the speaker 12 in FIG.

On the other hand, the monitoring information transmitting device 23 in the monitoring information acquisition device 2 includes a network interface / line control unit 60,
A CPU 61 that controls each unit of the monitoring information acquisition device 2, an access management unit 62 that protects the monitoring information, an image / audio codec unit 63 that encodes the image signal and the audio signal input from the management information input unit 14, Memory unit 64
And an initial information generation unit 65 which is transmitted when a line is connected and generates data which becomes a noise image or sound at the time of reproduction,
It has a switch 66 and a multimedia demultiplexing unit 67 for generating a transmission frame and converting a transmission rate. The management information input unit 14 corresponds to the video camera 21 and the microphone 22 in FIG.

FIG. 3 shows a more specific structure of the monitoring information acquisition device 2. The network interface / line control unit control unit 60 of FIG. 2 includes an interface unit 601 for matching with the ISDN network 3 and a line control unit 6 for controlling line connection.
02. Multimedia demultiplexing unit 67
Is composed of a demultiplexing unit 671 that demultiplexes a received frame, a demultiplexing unit 672 that demultiplexes a transmission frame, and a control unit 673 that controls the demultiplexing unit 671 and demultiplexing unit 672. The image / sound codec unit 63 includes a code decoding unit 631 and a digital / analog conversion unit 632. Further, the memory unit 64 includes a program memory 641 for storing control programs for the CPU 61 and the line control unit 602,
It is composed of a transmission memory 642 that temporarily holds image data and the like processed by the image and sound codec 63. The access management unit 62 includes an interface unit 621, a timer 622 for measuring a certain period, an own password memory 623 for storing a preset own password, and a password comparator 624 for comparing the own password and the received password. Composed.

FIG. 4 shows a monitoring device 1 and a monitoring information acquisition device 2.
It is a sequence diagram of communication performed between. In the figure, the small arrow indicates the D channel signal of the ISDN user-network interface, and the large arrow indicates the B channel signal.

First, in the originating monitoring device 1, the administrator inputs the subscriber number assigned to the monitoring information acquisition device 2 by using the key input unit 54. The entered subscriber number is passed through the buffer 55, the demultiplexing unit 53, the network interface / line control unit 50 under the control of the CPU 51, and the IS number.
It is sent to the DN network 3. As a result, the call setting information is transmitted to the monitoring information acquisition device 2 as a D channel signal. Receiving this, the network interface / line control unit 60 of the monitoring information acquisition device 2 on the called side outputs a ringing tone as necessary, transmits a response signal to the ISDN network 3, and transmits the image data on the first B channel. Connect with. Communication similar to the above is performed again, and the second B channel for voice data transfer is set between the devices 1 and 2. Then, the monitoring device 1 transmits a request for setting a logical data communication port for password transmission to a part of the two B channels. Upon receiving this request, the monitoring information acquisition device 2 sets the data communication port and sends a response signal.

Next, the monitoring device 1 transmits the password input to the key input section 54 by the monitor using the set data communication port. The access management unit 62 of the monitoring information acquisition device 2 compares the password received from the monitoring device 1 with a preset own password, and if they match, uses the two B channels to encode the encoded image data. And voice data (monitoring information) is transmitted. The transmission data is received by the monitoring device 1, passes through the memory unit 52 and the multimedia demultiplexing unit 53, is decoded by the video / audio codec, and is reproduced by the monitoring information output unit 14. If the passwords do not match, the monitoring information acquisition device 2
Disconnects and releases the line using the D channel,
End the communication.

FIG. 5 shows the monitoring information acquisition device 2 after line setting.
The detailed operation sequence of is shown.

After setting the B channel and the data communication port, the CPU 61 of the monitoring information acquisition device 2 responds to an incoming call signal (reception at the data communication port) from the multimedia demultiplexing unit 67 of the access management unit 62. Timer 622
Start Then, the output of the own password is requested to the own password memory 623, and the switch 66 is caused to select the output of the initial information generation unit 65. As a result, the data generated by the initial information generation unit 65 is transmitted to the monitoring device 1 through the set B channel via the switch 66, the multimedia demultiplexing unit 67, and the network interface / line control unit 60.

During this period, the password comparator 624 sequentially compares the received data of the multimedia demultiplexing unit 67 with the own password output from the own password memory 623 bit by bit, and outputs the comparison result to the CPU 61. If the comparison result is a match, the CPU 61 causes the switch 6
6 to select the output of the image / sound memory 642. As a result, the encoded image data and audio data are transmitted to the receiving side device through the set B channel. CPU6
1 indicates to the network interface / line control unit 60 to disconnect the line when the comparison result does not match, or when the measurement completion notification is received from the timer 622 before the comparison result is input.

As described above, in the remote monitoring system of this embodiment, the safety of the monitoring information is maintained, and
The monitoring device 1 can be connected to any subscriber line of the ISDN network 3. Further, the data generated by the initial information generation unit 65 which becomes noise during reproduction prompts a person who mistakenly connects to the monitoring information acquisition device 2 to disconnect the line early. Further, by limiting the password acceptance period by the timer 622, it is possible to prevent the misconnection state from being prolonged.

Although the configuration and operation relating to communication of monitoring information have been described above, the present monitoring system transmits image data and audio data from the monitoring device 1 and reproduces them by the monitoring information acquisition device 2. You can also Using this function, the administrator can issue various instructions to the operator on the monitoring information acquisition device 2 side. Further, by using a small display device such as a liquid crystal panel as the display 11, the monitoring device 1 can be realized as a portable device. Further, the data generated by the initial information generation unit 65 may instruct input of a password at the time of reproduction.

[0022]

As described above, according to the present invention, it is possible to provide a monitoring information acquisition device which supplies monitoring information only to a supervisor without using call setting information.

Further, it is possible to provide a distance monitoring system using the monitoring device.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a distance monitoring system according to an embodiment of the present invention.

FIG. 2 is a block diagram showing the configurations of a monitoring device and a monitoring information acquisition device.

FIG. 3 is a block diagram showing a detailed configuration of a monitoring information acquisition device.

FIG. 4 is a sequence diagram showing a procedure of communication between the monitoring device and the monitoring information acquisition device.

FIG. 5 is a sequence diagram showing an operation of the monitoring information acquisition device after line setting.

[Explanation of symbols]

1 ... Monitoring device, 11 ... Display, 12 ... Speaker, 13 ... Monitoring information receiving device, 14 ... Monitoring information output part, 2 ... Monitoring information acquisition device, 21 ... Video camera, 2
2 ... Microphone, 23 ... Monitoring information transmitting device, 24 ... Monitoring information input unit, 3 ... ISDN line, 50, 60 ... Network interface / line control unit, 51, 61 ... CPU, 5
2, 64 ... Memory unit, 53, 67 ... Multimedia demultiplexing unit, 56, 63 ... Image / audio codec, 54 ...
Key input unit, 55 ... Buffer, 57 ... Signal conversion unit, 6
2 ... access management unit, 65 ... initial information generation unit, 66 ...
Switch, 601 ... interface unit, 602 ... line control unit, 621 ... interface unit, 622 ... timer, 623 ... own password memory, 624 ... password comparator, 631 ... Code / decoder, 632 ... digital-analog converter, 671 ... separation section, 672 ... multiplexing section, 673 ... control section, 641 ... program memory, 6
42 ... Transmission memory.

Claims (6)

[Claims] 1. A monitoring information acquisition device connected to a monitoring device by a communication line, wherein information is input between an input means for fetching monitoring information and the monitoring device in response to a call from the monitoring device side. A communication means for starting transmission and reception, a detection means for detecting a password from the received information, a determination means for determining whether or not the detected password matches a predetermined value determined in advance, If it is determined that the monitoring information acquisition device is provided, the monitoring information acquisition device further includes control means for transmitting the acquired monitoring information from the communication means to the monitoring device. 2. A monitoring information acquisition device connected to a monitoring device by an ISDN line, comprising: input means for receiving monitoring information representing images and audio; and encoding means for encoding the acquired monitoring information. The communication means that receives the call setting information from the monitoring device side and starts transmitting and receiving information with the monitoring device, the detecting means that detects the password from the received information, and the detected password are A determining means for determining whether or not the value matches a predetermined value determined in advance, and a control means for transmitting the encoded monitoring information from the communication means to the monitoring device when it is determined to match. A monitoring information acquisition device, comprising: 3. The monitoring information acquisition apparatus according to claim 2, further comprising means for generating initial information that becomes an abnormal image or sound at the time of reproduction, and the control means after receiving the call setting information. The monitoring information acquisition device, characterized in that the generated initial information is transmitted from the communication means until the determination means determines that they match or does not match. 4. The monitoring information acquisition apparatus according to claim 3, further comprising timer means for measuring a period of a predetermined length from the time when the communication means starts communication, and the measurement of the timer means ends. Before, when the determination of the match in the determination means is not made, the control means,
A monitoring information acquisition device characterized by causing the communication means to disconnect the line. 5. The monitoring information acquisition device according to claim 2, and a monitoring device connected to the monitoring information acquisition device by an ISDN line, wherein the monitoring device transmits information to and from the monitoring information acquisition device. Communication means for transmitting and receiving, means for accepting a password from an observer, means for transmitting the accepted password from the communication means, decoding monitoring information received by the communication means, and an image obtained by the decryption A remote monitoring system comprising means for reproducing sound. 6. The distance monitoring system according to claim 5, wherein the monitoring device is a portable terminal.