JP2003324721A - Video supervisory system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a video supervisory system capable of managing the entire system without the need for provision of a communication controller to each supervisory room and surely attaining camera control by each supervisory room. <P>SOLUTION: A management CPU 23 sequentially polls supervisory rooms 30a, 30b, references a camera control management table when receiving a camera control request from the supervisory room 30a, informs the supervisory room 30a about a control frequency of a camera when the camera on request is not under the control at present and gives a control permission. The supervisory room 30a returns a reply to the management CPU 23 and transmits a camera control signal by matching a transmission frequency of a variable high frequency MODEM 43 with the notified frequency. The management CPU 23 rewrites control information of the camera described in the camera control management table into 'under camera control' upon the receipt of the supervisory room 30a, references the camera control management table when receiving a camera control request from the supervisory room 30b after that, and informs the supervisory room 30b about the control frequency of the camera and provide permission when the camera on request is not under the control at present. <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 video surveillance system using, for example, a broadband LAN system.

[0002]

2. Description of the Related Art Conventionally, for example, for the purpose of disaster prevention and crime prevention in a stadium or a building, a video monitoring system by a broadband LAN system to which CATV technology is applied has been used.

A video surveillance system based on a broadband LAN system to which the conventional CATV technology is applied has a plurality of surveillance cameras installed in a predetermined surveillance area, and the images taken by the surveillance cameras are each modulated by a modulator and then frequency-multiplexed. Then, it is sent to a plurality of monitoring rooms via a broadband LAN. In each monitoring room, an image sent from each monitoring camera via a broadband LAN is selected by a tuner, demodulated, and sequentially displayed on a monitor for monitoring. Further, each surveillance room has a function of controlling the surveillance direction of each surveillance camera.

When image data and control data are transmitted and received between a plurality of surveillance cameras and a surveillance room as described above, it is necessary to control these transmission and reception data as a whole. Therefore, conventionally, a communication control device and a control CP are provided in each monitoring room.
Each U is provided to control transmission / reception data between each surveillance camera and the surveillance room.

[0005]

As described above, in the conventional video surveillance system using the broadband LAN system,
In order to control transmission / reception data between each surveillance camera and the surveillance room, it is necessary to provide not only a control CPU but also a communication control device in each surveillance room, which causes a problem that the configuration becomes complicated and the cost becomes high. .

The present invention has been made in view of the above circumstances, and provides a video surveillance system capable of managing the entire system without providing a communication control device in each surveillance room and reliably performing camera control in each surveillance room. .

[0007]

A video surveillance system according to the present invention comprises a plurality of surveillance cameras for photographing a surveillance area and a modulator for modulating the video signals photographed by the respective surveillance cameras into frequencies of different channels. And a trunk line for frequency-multiplexing the signals modulated by the modulators and transmitting them to a plurality of monitoring rooms, and provided corresponding to each of the monitoring cameras, and sent from the monitoring room via the trunk line. A high-frequency receiving modem that receives a camera control signal of a predetermined channel and controls the operation of the corresponding surveillance camera; a management CPU that is connected to the trunk line and manages the operations of the plurality of monitoring rooms; and a management CPU Security camera I
A camera control management table in which the D number, the control frequency, and the current camera control status are associated with each other; a control CPU provided in each of the monitoring rooms and controlled by the management CPU;
It is provided in each of the monitoring rooms, and the control C
A variable demodulator comprising a transmission variable high-frequency modem for transmitting a camera control signal at a control frequency instructed via the PU and a tuner for receiving a video signal transmitted from the surveillance camera via the trunk line, and the tuner. A monitor TV for displaying a video signal from a selected surveillance camera, the management CPU sequentially polls the plurality of surveillance rooms, and receives a camera control request sent from a control CPU in the surveillance room. When the requested camera is not currently being controlled, the first control means notifies the control frequency of the camera to the control CPU to give control permission, and the control is performed. When the response from the permitting control CPU is received, the control information of the corresponding camera in the camera control management table is rewritten to "camera controlled". 2 means, and 3rd means for rewriting the control information of the corresponding camera in the camera control management table to "camera uncontrolled" by the camera control end notification from the control CPU that has given the control permission. Is characterized by.

In the above configuration, the management CPU polls a plurality of monitoring rooms in sequence, and when it receives a camera control request from the monitoring room, it refers to the camera control management table and the requested camera must be under control. For example, the control frequency of the camera is notified to the above monitoring room and the control permission is given. Upon receipt of the control permission, the monitoring room returns a response to the management CPU and sends a camera control signal in accordance with the notified frequency of the transmission frequency of the variable high frequency modem. The management CPU is
When the response from the monitoring room is received, the control information of the camera in the camera control management table is rewritten to "camera controlled", and then the other monitoring rooms are polled.

By setting the camera control management table in the management CPU as described above, the camera control permission can be given by referring to the camera control management table when a camera control request is received from the monitoring room. The entire system can be reliably managed without providing a communication control device in each room.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a system block diagram showing an example of the overall configuration of a video surveillance system by a broadband LAN system to which CATV technology is applied.

As shown in FIG. 1, a plurality of surveillance cameras 1a and 1a are provided in a surveillance area such as a stadium or a building.
b, ... Are installed. In this example, a dome type camera 1a, a camera platform 1b, and a fixed dome type camera 1c are installed as surveillance cameras. The dome type camera 1a is installed, for example, on the ceiling 2 or the like, and can control the monitoring direction in any direction such as up, down, left and right and has a zoom function. The camera b with a platform can control the monitoring direction by the platform 3 in any direction of up, down, left and right. The fixed dome type camera 1c is installed on the ceiling 2 or the like and has a fixed monitoring direction. For example, a total of about 76 cameras can be connected to one trunk line, but about 16 cameras can be simultaneously controlled from a plurality of monitoring rooms.

The cameras 1a, 1b, ...
The SC system video signal is output as a monitor image. The monitoring image captured by the dome type camera 1a is modulated by the modulator 4a, and then the coaxial cable 5a and the mixer 6a.
Via the broadband LAN to the main line 20a. The monitoring image modulated by the modulator 4a is frequency-multiplexed with the transmission signal of the main line 20a by the mixer 6a, amplified by the bidirectional amplifier 21, and then monitored (A) 30a and monitoring room (details will be described later). B) 30b, ...

The control signal for the dome type camera 1a sent from the monitoring room (A) 30a, the monitoring room (B) 30b, ... By the main line 20a is controlled by the mixer 6a via the coaxial cable 5a. It is input to the section 7. The camera control unit 7 is composed of a variable frequency reception high frequency modem 8. The high-frequency modem 8 is, for example, a semi-fixed type capable of setting 16 channels in a frequency range of 25 to 49 MHz, demodulates a camera control signal sent from the monitoring room, and determines the direction and zoom magnification of the dome type camera 1a. Etc. By setting a camera ID number for each camera, it is possible to connect and control a plurality of cameras to one high-frequency modem 8.

The surveillance image photographed by the camera 1b with the platform is modulated by the modulator 4b and then the coaxial cable 5 is inserted.
It is sent to the main line 20a via b and the mixer 6b. The monitoring image modulated by the modulator 4b is frequency-multiplexed with the transmission signal of the main line 20a by the mixer 6b and amplified by the bidirectional amplifier 21, and then the monitoring room (A) 30a, the monitoring room (B) 30b, Sent to ...

The control signal for the camera with head 1b sent from the monitoring room via the main line 20a is input from the mixer 6b to the camera platform controller 10 via the coaxial cable 5b. The pan / tilt head control unit 10 includes, for example, a variable frequency reception high-frequency modem 11, an MPU 12, and a relay 1.
It is composed of 3. The high frequency modem 11 is a semi-fixed type capable of setting, for example, 16 channels in a frequency range of 25 to 49 MHz, demodulates a camera control signal sent from the monitoring room, and inputs it to the MPU 12. The MPU 12 controls the relay 13 in accordance with the control signal demodulated by the high frequency modem 11 so that the direction of the camera platform 3
That is, the monitoring direction of the camera 1b with a platform is controlled.

The monitoring image taken by the fixed dome type camera 1c is modulated by the modulator 4c and then sent to the main line 20a via the coaxial cable 5c and the mixer 6c. The monitor image modulated by the modulator 4c is the mixer 6
After being frequency-multiplexed with the transmission signal of the main line 20a by b, amplified by the bidirectional amplifier 21, it is sent to the monitoring room (A) 30a, the monitoring room (B) 30b, ....

A management CPU 23 is connected to the main line 20a via a branching device 22, and a monitoring room (A) 30 is provided.
a, the monitoring room (B) 30b, ... Are connected. The monitoring room (A) 30a, the monitoring room (B) 30b, ...
There are about several places.

The management CPU 23 controls the monitoring room (A) 3
0a, the monitoring room (B) 30b, ..., The overall management is performed for the monitoring room (A) 30a and the monitoring room (B) 30.
Data is exchanged by polling with b, .... The management CPU 23 is provided with a camera control management table 24 shown in FIG. 2 and a priority order management table 25 shown in FIG. 3, and table contents are set by an input from a data input device (not shown).

In the camera control management table 24, the camera ID numbers (camera numbers) of the cameras 1a, 1b, ..., The control frequency, and the current control status (controlled or not controlled) are set in association with each other. The above control status is in the monitoring room (A)
Cameras 1a, 1 by 30a, monitoring room (B) 30b, ...
It indicates whether or not control for b, ... Is currently being performed, and is rewritten by the management CPU 23. Further, in the priority management table 25, each monitoring room (A) 3
0a, monitoring room (B) 30b, ... Priority is registered.

The management CPU 23 includes a monitoring room (A) 30a,
When an operation request for the cameras 1a, 1b, ... Is issued from the monitoring room (B) 30b, ..., By referring to the camera control management table 24 and the priority order management table 25, the monitoring room (A) 30a, the monitoring room ( B) Manage camera control operations by 30b, ....

Monitoring room (A) 30a, monitoring room (B) 3
Since 0b, ... Have the same configuration, hereinafter, the monitoring room (A)
The configuration of 30a will be described. A control CPU 31 is provided in the monitoring room (A) 30a. This control CPU
Reference numeral 31 denotes a touch panel 3 which also serves as an input device and a display device.
2 is connected, and a disaster prevention signal from a disaster prevention sensor (not shown) such as a fire detection sensor provided at various places in the monitoring area is input via the S / P (serial / parallel) converter 33. To be done. The touch panel 32
Can perform various setting operations and camera control operations for the control CPU 31 and the like. C for control
As the input device / display device for the PU 31, a control PC (personal computer) or the like can be used in addition to the touch panel 32, and the input device and the display device may be provided separately.

A high frequency modem (RF modem) 34 is connected to the control CPU 31, and the high frequency modem 34 is connected to the main line 20a via a branching device 35a. The control CPU 31 exchanges data with the management CPU 23 via the high frequency modem 34. In this case, the management CPU 23 polls the control CPU 31 using, for example, the frequency of 70.08 MHz, and the control CPU 31 responds using the frequency of 44.48 MHz.

The control CPU 31 further includes a demodulator, for example, a four-wave demodulator 37, via a communication driver / receiver 36.
a, 37b, ... This four-wave demodulator 37a,
Since 37b, ... Have the same configuration, the four-wave demodulator 37a
The configuration will be described.

The four-wave demodulator 37a comprises an MPU 41, a communication driver / receiver 42, a variable high frequency modem (variable RF modem) 43 for transmitting a camera control signal, and tuners 44a to 44d. 4-wave demodulator 37a
Includes a light receiving unit 40 that receives infrared rays sent from an infrared remote controller (remote controller) 38 and converts the infrared rays into an electric signal, and inputs the electric signal converted by the light receiving unit 40 to the MPU 41. The MPU 41 operates according to a control instruction given from the infrared remote controller 38. The remote controller 38 can give, for example, a camera selection instruction, a camera direction instruction, a screen selection instruction, etc., as will be described in detail later.

When the operation signal is input from the remote controller 38, the MPU 41 exchanges data with the control CPU 31 via the communication drivers / receivers 42 and 36, and the MPU 41 operates in accordance with the instruction from the control CPU 31. The operation control in the wave demodulator 37a is performed.

When the number of the camera to be controlled is designated by the remote controller 38, the MPU 41 controls the control CP.
After receiving permission from the management CPU 23 via U31, the frequency (channel) of the variable high frequency modem 43 is set according to the instruction of the management CPU 23, and then a camera control signal according to remote control operation is output via the variable high frequency modem 43. To do. The variable high-frequency modem 43 operates in the frequency range of 25 to 49 MHz by a control command given from the management CPU 23 via the control CPU 31 and the MPU 41.
6 channels can be set variably, MP
The camera control signal from U41 is modulated and output to the trunk line 20a via the branching device 35b. The camera control signal output to the trunk line 20a is frequency-multiplexed to obtain the camera 1a,
1b, ... Is sent to the side.

When the number of the camera to be controlled is designated by the remote controller 38, the MPU 41 receives the permission of the management CPU 23 directly via the variable high frequency modem 43 without passing through the control CPU 31, and the management CPU 23 receives the permission. The frequency (channel) of the variable high frequency modem 43 may be set according to the instruction.

The four-wave demodulator 37a has a high-frequency switch (RF-) on the input side of the tuners 44a to 44d.
SW) 51a-51d are connected, tuners 44a-4
A 4-screen synthesizer 53 is connected to the output side of 4d. This 4
A monitor TV 54 is connected to the screen synthesizer 53.

The high frequency switches 51a to 51d include
The monitoring image sent by the main line 20a is the diverter 35c.
And the 4-distributor 52a, and the monitoring image sent by the other main line 20b is input through the splitter 35d and the 4-distributor 52b.

In accordance with the operation of the remote controller 38, the high-frequency switches 51a to 51d, the tuners 44a to 44d, and the 4-screen synthesizer 53 are controlled to display the 4-screen synthesized image or the selected specific image on the monitor TV 54.

FIG. 4 shows an example of the configuration of the remote controller 38. The remote control 38 has a power button 61,
Scan button 62, switching time button 63, ten-key button 64, screen display button 65, video selection button 66,
Channel up button (CH UP) 67, Channel down button (CH DOWN) 68, Cancel button 6
9, enter button (ENTER) 70, 4 split button 7
1, screen 1 button 72a, screen 2 button 72b, screen 3
A button 72c, a screen 4 button 72d, a camera control button 73, up / down / left / right camera direction instruction buttons 74, a focus button 75, a wiper button 76, an illumination button 77, and the like are provided.

The power button 61 is a four-wave demodulator 37a, 3
7b, ... A button for turning on / off the power source, and a ten key button 64 is used for demodulator number (monitor number) (1 to 9)
Is specified. In this case, pressing 0 on the ten-key button 64 designates all demodulators.

The scan button 62 is a button for turning on / off the automatic switching of the image, and the four-wave demodulator 37 can be operated by a combination operation of the scan button 62 and the ten-key button 64.
It is possible to set automatic switching of video by designating a, 37b, ....

The switching time button 63 is a button for changing the scan switching time, and the four-wave demodulators 37a, 37 can be operated by a combination operation of the switching time button 63 and the numeric keypad 64.
When b, ... Are designated and then the switching time (01 to 60 seconds) is input with the ten-key button 64 and the confirm button 70 is pressed, the input scan switching time is registered.

The screen display button 65 is a button for turning on / off the screen display of the monitor TV 54, and by operating the screen display button 65 and the ten-key button 64 in combination, the specified four-wave demodulators 37a, 37b ,. Monitor screen tv
54 can be displayed.

The video selection button 66 is a 4-wave demodulator 37.
buttons for selecting a, 37b, ... And cameras 1a, 1b, .. The four-wave demodulators 37a, 37 are first operated by a combination operation of the image selection button 66 and the numeric keypad 64.
Select b, ... Next, using the ten-key button 64, a camera number for designating the cameras 1a, 1b, ... Is input. Then, when the screen 1 button 72a is pressed, the selected image is displayed on the upper left screen of the monitor TV 54 as shown in FIG.
Press the screen 2 button 72b to display the selected image on the upper right screen, press the screen 3 button 72c to display the selected image on the lower left screen, and press the screen 4 button 72d to display the selected image on the lower right screen. To be done. It should be noted that if the above image selection is performed during the execution of scanning, the scan of the monitor that has selected the image is stopped.

The 4-split button 71 is a button for enlarging and displaying the split screen. First, the 4-division button 71 is pressed and the demodulator number (monitor number) is input with the ten-key button 64. In this state, when the screen 1 button 72a is pressed, the upper left screen of the selected monitor TV 54 is enlarged and displayed, and when the screen 2 button 72b is pressed, the upper right screen of the monitor TV 54 is enlarged and displayed. When the screen 1 button 72c is pressed, the lower left screen of the monitor TV 54 is enlarged and displayed, and when the screen 2 button 72d is pressed, the lower right screen of the monitor TV 54 is enlarged and displayed. Also, from the enlarged screen, the 4-split button
By pressing and inputting the demodulator number (monitor number) using the ten-key button 64, and then pressing the enter button 70, it is possible to return to the 4-split screen.

The channel up button 67 is a button for increasing the channel selected by the tuners 44a to 44d, and the channel down button 68 is a button for decreasing the selected channel.

By pressing the cancel button 69 before operating the confirm button 70, the operation up to that point can be canceled.

The camera control button 73 is used for the cameras 1a, 1
When the camera control button 73 is pressed and then the camera direction instruction button 74 is pressed with a button operated when controlling b, the direction of the designated cameras 1a and 1b can be adjusted to any direction of up, down, left and right. . Further, by pressing the camera control button 73 and then operating the focus button 75, the focus of the cameras 1a and 1b is changed to "autofocus", "far", "near", "telephoto", "wide-angle".
Can be set to.

The wiper button 76 is a button for operating the wipers of the cameras 1a and 1b.

The illumination button 77 is a button for turning on / off the illumination of the cameras 1a and 1b.

Next, the operation of the video surveillance system shown in FIG. 1 will be described. First, the modulator 4 of the cameras 1a, 1b, ...
The frequencies of a, 4b, and 4c are respectively set to predetermined values, and the carrier frequency (channel) of the high-frequency modem 8 for the dome-shaped camera 1a and the carrier frequency of the high-frequency modem 11 in the camera platform controller 10 for the camera platform 1b. Set the frequency (channel) etc.

Further, in the management CPU 23, the camera control management table 24 shown in FIG. 2 and the priority order management table 25 shown in FIG. 3 are set as described above. That is, various setting data regarding the cameras 1a, 1b, ... Are registered in the management CPU 23.

The monitoring room (A) 30a and the monitoring room (B)
Also in 30b, ..., Various settings are made from the touch panel 32 and registered in the control CPU 31. For example, the relationship between the set frequencies of the modulators 4a, 4b, ... On the side of the cameras 1a, 1b, ... Is registered in the control CPU 31.

Then, the images taken by the cameras 1a, 1b, ... Are monitored room (A) 30a and monitoring room (B) 30.
When monitoring with b, ..., MPU 41 controls CPU 3
The high-frequency switches 51a to 51d and the tuners 44a to 44 operate in accordance with the operation of the remote controller 38.
By controlling the d and 4-screen combiner 53, the monitor image of the selected channel is 4-screen combined, or the designated screen is enlarged and displayed on the monitor TV 54.

Further, the cameras 1a, 1
If an adjustment operation such as the monitoring direction is performed on b, M
The PU 41 sends the operation information to the control CPU 31 via the communication drivers / receivers 42 and 36. When receiving the polling service from the management CPU 23, the control CPU 31 sends a camera operation request from the MPU 41 or the touch panel 32 or a disaster prevention signal input via the S / P converter 33 to the management CPU 23.

The management CPU 23 uses the monitoring room (A) 30a,
The monitoring room (B) 30b, ... Is constantly polled, and the monitoring room (A) 30a, the monitoring room (B) 30b ,.
When the operation request and the disaster prevention signal are received from the monitoring room (A) 30
a, a monitoring room (B) 30b, ... Is displayed on the touch panel 32 and an alarm is generated.

The management CPU 23 is, for example, the monitoring room (A) 3
When there is an operation request from 0a, the operation state of the other monitoring room (B) 30b, ... Is checked, and if the operation does not overlap, the operation request is immediately permitted. Wait until it is resolved, and then monitor room (A) after it is resolved.
The operation request is permitted to the control CPU 31 of 30a. When the management CPU 23 receives the operation request, the control CPU 31 sends a control command to the MPU 41 in accordance with the instruction sent from the management CPU 23, sets the carrier frequency of the variable high-frequency modem 43, and sends the camera control command to the main line 20a. It is sent to the camera 1a, 1b side via the.

On the side of the cameras 1a and 1b, the high frequency modem 8 or the high frequency modem 11 corresponding to the set channel of the variable high frequency modem 43 receives the camera control command from the variable high frequency modem 43. When the high frequency modem 8 receives the camera control command, the control command is demodulated to adjust the monitoring direction, focus and the like of the dome type camera 1a.
When the high-frequency modem 11 of the platform control unit 10 receives the camera control command, the control command is demodulated and MP is transmitted.
Output to U12. The MPU 12 drives the relay 13 according to the camera control command, rotates the platform 3, and adjusts the monitoring direction.

Next, the monitoring room (A) 30a and the monitoring room (B)
The processing operation of the monitoring room (A) 30a, the monitoring room (B) 30b, and the management CPU 23 in the case of controlling the directions, the focus, etc. of the cameras 1a, 1b by operating the touch panel 32 provided in 30b, the timing of FIG. This will be described with reference to the chart.

The management CPU 23 refers to the camera control management table 24 shown in FIG. 2 and executes a control CP for the monitoring room (A) 30a with a command to which the current camera control status is added.
A polling command is transmitted to U31 (hereinafter, abbreviated as CPU in monitoring room (A)) (step A1). The monitoring room (A) CPU that has received the polling command displays the current camera control status on the screen 81A of the touch panel 32 as shown in FIG. Also, the monitoring room (B)
30b control CPU 31 (hereinafter, monitoring room (B) CPU
7), the current camera control status is displayed on the screen 8 of the touch panel 32 by receiving the polling command from the management CPU 23, as shown in FIG. 7B.
Display on 1B.

Now, the monitoring room (A) 30a and the monitoring room (B)
Assuming that the camera control is not performed on 30b,
Screen 8 of touch panel 32 in monitoring room (A) 30a
1A and a screen 81B of the touch panel 32 in the monitoring room (B) 30b, as shown in FIGS. 7A and 7B, a numeric keypad 82 for touch-inputting data, a clear key CLR, a backspace key. The BS, enter button 83, and end button 84 are displayed, and "Please enter the camera number." Is displayed in the operation guide display area 85.
Also, a message "no camera being controlled" is displayed, and "0" is displayed in the camera number display area 86.

In the above state, for example, the monitoring room (A)
When the camera is controlled by 30a, the ID number "101" of the camera to be controlled, for example, the camera 1a is input from the ten key 82 on the screen 81A of the touch panel 32, and the enter button 83 is touched. By this operation, a camera control request is sent from the monitoring room (A) CPU to the management CPU 23 at the time of polling response (step A).
2).

Upon receipt of the camera control request, the management CPU 23 refers to the camera control management table 24, and if the camera 1a (101) for which the control request is made is not currently under control, the monitoring room (A ) The CPU is notified of the control frequency of the camera 1a (101), and control permission is given (step A3).

The monitoring room (A) CPU that has received the control permission is
The management CPU 23 returns a response to the management CPU 23 (step A4), and the management CPU 23 having received this response rewrites the control information of the camera in the camera control management table 24 to "camera controlled" (step A5). As a result, the camera 1a is under control of the monitoring room (A) 30a.

The monitoring room (A) CPU executes step A4
After returning a response to the management CPU 23 with, the camera 1a (10
The control operation for 1) is executed (step A6). That is, the monitoring room (A) CPU adjusts the transmission frequency of the variable high-frequency modem 43 in a predetermined specific four-wave demodulator, for example, the four-wave demodulator 37a to the frequency notified from the management CPU 23, and the touch panel 32 Figure 8
The camera operation screen 81A shown in (a) is displayed. On this screen 81A, the "camera number 101" being controlled is displayed, and the up / down / left / right camera direction instruction buttons 91,
"Far", "near", "telephoto", "wide-angle" focus button 92, autofocus button 93, end button 84
Is displayed.

The surveillance staff in the surveillance room (A) 30a touch-operates the button on the screen 81A of the touch panel 32,
The monitoring direction, focus, etc. of the camera 1a (101) are controlled. When ending the control of the camera 1a (101), the end button 84 on the screen 81A is touch-operated.

On the other hand, the management CPU 23 controls the camera 1a.
During the control of (101), the camera control management table 24 is referred to and a polling command is transmitted to the monitoring room (B) CPU with a command to which the current camera control status is added (step A7). The monitoring room (B) CPU that received the polling command indicates the current camera control status as shown in FIG.
It is displayed on the screen 81B of the touch panel 32 as shown in (b). On this screen 81B, a camera number input screen is displayed, and it is displayed in the operation guide display area 85 that the camera 1a with the number "101" is being controlled.

As described above, by displaying the controlled camera number in the operation guide display area 85 on the camera number input screen, the surveillance staff can enter the currently controlled camera number before inputting the camera number to be controlled. I can know.

When the camera ID number to be controlled in the monitoring room (B) 30b is input and the enter button 83 is operated on the screen of FIG. 8 (b), the monitoring room (B) CPU controls the polling response at the time of response. The camera you want, eg camera 1b
The camera control request with the ID number of is transmitted to the management CPU 23 (step A8).

Upon receipt of the camera control request, the management CPU 23 refers to the camera control management table 24 and confirms that the camera for which the control request has been made is not currently under control.
The control frequency of the camera is notified to the CPU in the monitoring room (B) that has issued the request, and control permission is given (step A9).

The monitoring room (B) CPU that has received the control permission is
The management CPU 23 returns a response to the management CPU 23 (step A10), and the management CPU 23 receiving this response rewrites the control information of the camera in the camera control management table 24 to "camera controlled" (step A11).

The monitoring room (B) CPU executes the step A1.
After returning a response to the management CPU 23 at 0, the control operation for the camera 1b is executed (step A12).

Next, the management CPU 23 causes the camera 1a,
While controlling 1b, refer to the camera control management table 24,
A polling command is transmitted to the monitoring room (A) CPU with a command to which the current camera control status is added (step A13). At this time, the monitoring room (A) CPU
If the control operation of the camera 1a is continued, a response is simply returned to the management CPU 23 (step A14).

The management CPU 23 having received the response from the monitoring room (A) CPU then sends a polling command to the monitoring room (B) CPU (step A15). At this time, if the control operation of the camera 1b by the monitoring room (B) 30b is completed, the monitoring room (B) CPU notifies the management CPU 23 of the end of control of the camera 1b (step A16).

When the control CPU 23 receives the camera control end notification from the monitoring room (B) CPU, the control information of the corresponding camera in the camera control management table 24 is "camera uncontrolled".
(Step A17).

After that, the management CPU 23 makes the monitoring room (A)
A polling command is transmitted to the CPU (step A18). At this time, if the control operation of the camera 1a by the monitoring room (A) 30a has been completed, the monitoring room (A) CPU
Notifies the control CPU 23 of the end of control of the camera 1a (101) (step A19).

When the management CPU 23 receives the camera control end notification from the monitoring room (A) CPU, the control information of the corresponding camera in the camera control management table 24 is "camera uncontrolled".
(Step A20).

In the same manner, the management CPU 23 refers to the camera control management table 24 in the same manner, and monitors the monitoring room (A) CP.
U, polling the monitoring room (B) CPU,
According to the response, the monitoring room (A) CPU, the monitoring room (B) C
Manages PU operation.

Next, the monitoring room (A) 3 described with reference to FIG.
0a, the monitoring room (B) 30b and the management CPU 23, the processing operation when the priority of the monitoring room (A) 30a is higher than that of the monitoring room (B) 30b will be described with reference to the timing chart of FIG. .

Camera 1a (1 from the monitoring room (B) CPU
01), the management CPU 23 permits the control request and the monitoring room (B) 30b controls the camera 1a (101) (step B1). As shown in FIG. 10A, a screen 81B under camera control, that is, a "camera number 101" under control is displayed, and up / down / left / right camera direction instruction buttons 91, "far", "near", " A "telephoto" and "wide-angle" focus button 92, an autofocus button 93, and an end button 84 are displayed.

On the touch panel 32 of the monitoring room (A) 30a, as shown in FIG. 10 (d), an initial screen 81A for inputting a camera number, that is, a ten key 82,
The clear key CLR, the backspace key BS, the enter button 83, and the end button 84 are displayed, and the message “Enter the camera number.” And “Controlling camera 101” are displayed in the operation guide display area 85. It At this time, that is, when the camera number is not input, “0” is displayed in the camera number display area 86.

When the ten key 82 is operated to input the camera number 101 currently being controlled on the screen 81A of the touch panel 32 in the monitoring room (A) 30a, the camera number 101 is displayed in the camera number display area 86. Next, when the enter button 83 is operated, the monitoring room (A) CPU
When the management CPU 23 polls (step B2), the camera 1a to be controlled at the time of the response
The camera control request with the ID number is transmitted (step B3).

The management CPU 23 refers to the camera control management table 24 and refers to the camera 1a (10
1) Check if the camera is currently under control,
If a (101) is under control, the priority of the monitoring room (A) 30a that issued the request is further referred to by referring to the priority management table 25 shown in FIG.
If it is higher than the above, a control stop command is sent to the monitoring room (B) 30b being controlled (step B4).

Monitoring room (B) CPU that received a control stop command
Displays a message to the effect that the camera control is stopped, for example, "End camera control" on the screen 81B of the touch panel 32 as shown in FIG. 10B (step B5), and the variable high frequency modem 43 The carrier is turned off, that is, transmission is stopped (step B6), and management C is performed.
It responds to the PU 23 (step B7). In the monitoring room (B) 30b, the screen 81B of the touch panel 32 is displayed.
When the message "End camera control." Is displayed, the end button 84 is operated.

The management CPU 23, which has received the response from the monitoring room (B) CPU, clears "camera control in progress" which is the control information of the corresponding camera 1a (101) of the camera control management table 24 (step B8) and makes a request. The control frequency of the camera 1a is notified to the CPU of the monitoring room (A) which issued the control signal (step B9).

The monitoring room (A) CPU that has received the control permission is
Returns a response to the management CPU 23 (step B1
0), the management CPU 23 having received this response rewrites the control information of the corresponding camera in the camera control management table 24 to "camera controlled" (step B11). As a result, the camera 1a is under control of the monitoring room (A) 30a.

The monitoring room (A) CPU executes the step B1.
After returning a response to the management CPU 23 at 0, the camera 1a (1
01) is executed (step B1)
2). That is, the monitoring room (A) CPU is a 4-wave demodulator 3
The transmission frequency of the variable high frequency modem 43 in 7a is adjusted to the notified frequency, and the camera operation screen 81A shown in FIG. 10 (e) is displayed on the touch panel 32. On this screen 81A, the "camera number 101" being controlled is displayed, and the up / down / left / right camera direction instruction buttons 91,
"Far", "near", "telephoto", "wide-angle" focus button 92, autofocus button 93, end button 84
Is displayed.

The surveillance staff in the surveillance room (A) 30a touches and operates the buttons on the screen 81A of the touch panel 32,
The monitoring direction, focus, etc. of the camera 1a (101) are controlled. When ending the control of the camera 1a (101), the end button 84 on the screen 81A is touch-operated.

Next, the management CPU 23 controls the camera 1a.
During the control of (101), the camera control management table 24 is referred to and a polling command is transmitted to the monitoring room (B) CPU by a command to which the current camera control status is added (step B13). The monitoring room (B) CPU that has received the polling command from the management CPU 23 is the management CPU
23 (step B14) and a response to FIG.
As shown in (c), the touch panel 32 has a camera number input screen 81B, that is, a ten key 82 and a clear key CL.
R, backspace key BS, enter button 83, end button 84 are displayed, and operation guide display area 85 is displayed.
The message "Please enter the camera number." And "Controlling camera 101" are displayed. At this time, "0" is displayed in the camera number display area 86. Then control C
The PU 23 sends a polling command to the monitoring room (A) CPU (step B15). At this time, the monitoring room (A) CPU simply returns a response to the management CPU 23 if the control operation of the camera 1a (100) is continued (step B16).

The management CPU 23 sequentially polls the monitoring room (B) CPU and the monitoring room (A) CPU in the same manner.

The camera 1 is now in the monitoring room (A) 30a.
Assuming that a (101) is being controlled, the touch panel 32 displays a camera operation screen 81A as shown in FIG. 11 (a).

If the monitoring room (A) 30a controls the camera 1a (101) as described above, and the monitoring room (B) 30b having a lower priority selects the camera 1a (101), That is, if the camera number “101” is input on the camera number input screen 81B shown in FIG. 11B, the monitoring room (B) CPU controls the camera 1a (101) when polled by the management CPU 23. The request is output (step B17).

When the management CPU 23 receives a control request for the camera 1a (101) from the monitoring room (B) CPU, the management CPU 23 refers to the camera control management table 24 and the camera 1a (101) having the control request is currently under control. It is checked whether or not there is, and if the control is in progress, the priority management table 25 is further added.
Refer to to determine the priority. In this case, the priority of the monitoring room (B) 30b that issued the control request is the monitoring room (A) 3
Since it is lower than 0a, the management CPU 23 sends a camera control disable notification to the monitoring room (B) CPU that issued the request (step B18).

The monitoring room (B) CPU, which has received the camera control disable notification from the management CPU 23, displays "camera number 10" on the screen 81B of the touch panel 32 as shown in FIG. 11 (c).
The message "1" and "currently uncontrollable" are displayed (step B19), and a response signal is output to the management CPU 23 (step B20).

The touch panel 32 shown in FIG. 11 (c).
When the end button 84 is operated on the screen 81B of FIG. 1, the monitoring room (B) CPU displays the screen 81B of the touch panel 32 in FIG.
Return to the same camera number input screen as in 1 (b). At this time, on the screen 81B of the touch panel 32, the message "Enter the camera number." Is displayed together with the message "Enter the camera number." In the operation guide display area 85, and the camera number display area 86 displays "0". Is displayed.

Similarly, the management CPU 23 refers to the camera control management table 24 when receiving the camera control request, and further refers to the priority order management table 25 when the camera for which the control request is issued is currently being controlled. , The operation of the monitoring room (A) 30a, the monitoring room (B) 30b, ... Is controlled according to the priority order.

As described above, the management CPU 23 for managing the entire system is provided to set the camera control management table 24, and the monitoring room (A) 30a, the monitoring room (B) 30b,
By providing a variable high frequency modem 43 for transmission in the four-wave demodulators 37a, 37b, ...
3 can manage the monitoring rooms (A) 30a, the monitoring rooms (B) 30b, ... By referring to the camera control management table 24. As a result, the entire system can be managed without providing a communication control device in each monitoring room, and a plurality of cameras 1a, 1b, ... Can be provided by the plurality of monitoring rooms (A) 30a, the monitoring room (B) 30b ,. It becomes possible to control at the same time.

Further, the monitoring room (A) 30a and the monitoring room (B)
By displaying the operation guide of the camera and the currently controlled camera number on the touch panel 32 of 30b, ..., the surveillance staff can know the currently controlled camera number before inputting the camera number to be controlled, The control operation of the camera can be efficiently performed.

In the above embodiment, the monitoring room (A) 30a,
Touch panel 32 provided in monitoring room (B) 30b, ...
Although the case where the camera operation such as the selection of the camera number, the direction of the camera, and the focus is performed is described above, the camera operation can be performed by the remote controller 38 in the same manner as the touch panel 32. When the camera is operated by the remote controller 38, the MP of the four-wave demodulators 37a, 37b, ...
Since the camera control request is sent from U41 to the control CPU 31, the four-wave demodulator 37 that issued the camera control request
The transmission frequency is set to the variable high frequency modem 43 of a, 37b, ....

In the above embodiment, the monitoring room (A) 3
0a and the other monitoring room (B) 30b, ... Have the same configuration, the other monitoring room (B) 30b, ... Has a simple configuration in which the control CPU 31 and the touch panel 32 are omitted, and the remote controller 38 is used. The camera may be operated only by itself. In this case, when the number of the camera to be controlled is specified by the remote controller 38, the MPU 41 directly manages the CPU 23 via the variable high frequency modem 43.
In response to the instruction from the management CPU 23, the frequency (channel) of the variable high frequency modem 43 is set, and then a camera control signal according to the remote control operation is output via the variable high frequency modem 43.

[0093]

As described above in detail, according to the present invention, a camera control management table and a priority management table are set in a management CPU that manages the entire system, and a transmission control is provided in a demodulator in a monitoring room. A variable high-frequency modem is provided, and each monitoring room sets the frequency of the variable high-frequency modem according to an instruction from the management CPU and sends a camera control signal to each monitoring camera, so that camera control by multiple monitoring rooms is ensured. Can be done. Further, by displaying the control status of the surveillance camera on the display device provided in each surveillance room, the camera number currently under control can be known in advance,
The control operation of the camera can be efficiently performed.

[Brief description of drawings]

FIG. 1 is an overall system configuration diagram showing a video surveillance system according to an embodiment of the present invention.

FIG. 2 is a diagram showing a setting example of a camera control management table provided in a management CPU in the embodiment.

FIG. 3 is a diagram showing a setting example of a priority order management table provided in the management CPU in the embodiment.

FIG. 4 is a configuration diagram of a camera control remote controller according to the first embodiment.

FIG. 5 is a diagram for explaining a split display operation of the monitor TV screen in the embodiment.

FIG. 6 is a timing chart showing processing operations of the monitoring rooms (A) and (B) and the management CPU in the same embodiment.

FIG. 7 is a diagram showing a display state of a touch panel when camera control is not performed in the monitoring rooms (A) and (B) in the embodiment.

FIG. 8 is a diagram showing a display state of the touch panel when camera control is performed in the monitoring room (A) in the embodiment.

FIG. 9 is a timing chart showing the processing operations of the monitoring room and the management CPU when the monitoring rooms (A) and (B) are prioritized in the embodiment.

FIG. 10 is a touch panel when a camera controlled in the monitoring room (B) is selected in the monitoring room (A) when the priority of the monitoring room (A) is higher than that of the monitoring room (B) in the embodiment. The figure which shows the display state.

FIG. 11 is a touch panel when a camera controlled in the monitoring room (A) is selected in the monitoring room (B) when the priority of the monitoring room (A) is higher than that of the monitoring room (B) in the embodiment. The figure which shows the display state.

[Explanation of symbols]

1a ... dome type camera 1b ... Camera with pan head 1c ... Fixed dome type camera 2 ... Ceiling 3 ... 4a, 4b, ..., Modulator 5a, 5b, ..., Coaxial cable 6a, 6b, ..., Mixer 7 ... Camera control unit 8, 11 ... High-frequency modem for reception (RF modem) 10 ... Platform control unit 12 ... MPU 13 ... Relay 20a, 20b ... Main line 21 ... Bidirectional amplifier 22 ... turnout 23 ... Management CPU 24 ... Camera control management table 25 ... Priority management table 30a ... Monitoring room (A) 30b ... Monitoring room (B) 31 ... Control CPU 32 ... Touch panel 33 ... S / P converter 34 ... High-frequency modem 35a, 35b, ..., Branch device 36 ... Communication driver / receiver 37a, 37b, ..., 4-wave demodulator 38 ... Infrared remote controller (remote controller) 40 ... Light receiving part 41 ... MPU 42 ... Communication driver / receiver 43 ... Variable high frequency modem (variable RF modem) 44a-44d ... Tuner 51a to 51d ... High-frequency switch 52a, 52b ... 4 distributors 53 ... 4-screen synthesizer 54 ... Monitor TV

Continued front page    F-term (reference) 5C054 CG02 CH02 DA07 DA08 FE02                       FE17 FE18 FE23 HA18                 5C084 AA02 AA07 BB24 BB40 CC17                       DD12 EE01 FF03 FF27 GG17                       GG43 GG52 GG78 GG80                 5C087 AA02 AA03 AA09 AA24 AA25                       BB03 BB39 BB74 DD05 DD20                       EE05 EE16 FF01 FF04 FF19                       FF20 GG02 GG07 GG11 GG18                       GG52

Claims (6)

[Claims] 1. A plurality of surveillance cameras for photographing a surveillance area, a modulator for modulating video signals photographed by the respective surveillance cameras into frequencies of different channels, and a frequency of the signals modulated by the respective modulators. A main line that is multiplexed and transmitted to a plurality of monitoring rooms and a camera control signal of a predetermined channel that is provided corresponding to each of the monitoring cameras and that is sent from the monitoring room via the main line and receives the corresponding monitoring A high-frequency receiving modem for controlling the operation of the camera, a management CPU connected to the trunk line for managing the operation of the plurality of monitoring rooms, and provided in the management CPU, the ID number and control frequency of the monitoring camera and the current A camera control management table in which camera control statuses are associated with each other, a control CPU provided in each monitoring room and controlled by the management CPU, and each monitoring room A variable high frequency modem for transmission, which is provided and sends a camera control signal at a control frequency instructed from the management CPU via the control CPU, and a tuner for receiving a video signal sent from the surveillance camera via the trunk line. And a monitor TV for displaying a video signal from the surveillance camera selected by the tuner, the management CPU sequentially polling the plurality of surveillance rooms, and a control CPU in the surveillance room. When a camera control request transmitted from the camera is received, the camera control management table is referred to, and if the requested camera is not currently controlled, the control frequency of the camera is notified to the control CPU to give control permission. When a response is received from the first means and the control CPU that has given the control permission, the corresponding camera of the camera control management table The control information of the corresponding camera in the camera control management table is set to "camera uncontrolled" by the second means for rewriting the control information to "camera controlled" and the camera control end notification from the control CPU that has given the control permission. And a third means for rewriting the video surveillance system. 2. A plurality of surveillance cameras for photographing a surveillance area, a modulator for modulating video signals photographed by the respective surveillance cameras into frequencies of different channels, and a frequency of the signals modulated by the respective modulators. A main line that is multiplexed and transmitted to a plurality of monitoring rooms and a camera control signal of a predetermined channel that is provided corresponding to each of the monitoring cameras and that is sent from the monitoring room via the main line and receives the corresponding monitoring A high-frequency receiving modem for controlling the operation of the camera, a management CPU connected to the trunk line for managing the operation of the plurality of monitoring rooms, and provided in the management CPU, the ID number and control frequency of the monitoring camera and the current A camera control management table in which camera control statuses are associated with each other, a control CPU provided in each monitoring room and controlled by the management CPU, and each monitoring room A variable high frequency modem for transmission, which is provided and sends a camera control signal at a control frequency instructed from the management CPU via the control CPU, and a tuner for receiving a video signal sent from the surveillance camera via the trunk line. And a monitor TV that displays a video signal from the surveillance camera selected by the tuner. The management CPU, together with the camera control management table, is a priority registering priority of each surveillance room. A ranking management table is provided, and when a plurality of monitoring rooms are sequentially polled and a camera control request sent from the control CPU in the monitoring room is received, the requested camera is currently controlled by referring to the camera control management table. If not, first means for notifying the control frequency of the camera to the control CPU to give control permission, and If the requested camera is currently under control as a result of referring to the control control table, second reference means for further determining the control permission according to the priority order is given, and the control permission is given. When a response is received from the control CPU, the third means for rewriting the control information of the corresponding camera in the camera control management table to "camera controlled", and the camera control end from the control CPU that has given the control permission. And a fourth means for rewriting the control information of the corresponding camera in the camera control management table to "camera uncontrolled" in response to the notification. 3. A plurality of surveillance cameras for photographing a surveillance area, a modulator for modulating video signals photographed by the respective surveillance cameras into frequencies of different channels, and a frequency of the signals modulated by the respective modulators. A main line that is multiplexed and transmitted to a plurality of monitoring rooms and a camera control signal of a predetermined channel that is provided corresponding to each of the monitoring cameras and that is sent from the monitoring room via the main line and receives the corresponding monitoring A high-frequency receiving modem for controlling the operation of the camera, and an operation of the plurality of monitoring rooms based on a camera control management table which is connected to the trunk line and which associates the ID number of the monitoring camera with the control frequency and the current camera control status. Management CPU that manages the control CPU, a control CPU provided in each of the monitoring rooms and controlled by the management CPU, and an input connected to the control CPU And a display device, a variable high-frequency modem for transmission which is provided in each of the monitoring rooms, and which transmits a camera control signal at a control frequency instructed from the management CPU via the control CPU, and the main line from the monitoring camera. And a monitor TV for displaying a video signal from the surveillance camera selected by the tuner, and the control CPU sends the video signal from the management CPU. The ID number of the surveillance camera currently being controlled is displayed on the display device based on the received control information, and according to the camera ID number and the operation signal input from the input device, the control CPU is controlled under the control of the management CPU. A video monitoring system for outputting a camera control signal of a predetermined channel to the trunk line via a variable high frequency modem for transmission. 4. The management CPU is based on a camera control management table in which an ID number of a monitoring camera, a control frequency, and a current camera control status are associated with each other, and a priority management table in which priority levels of respective monitoring rooms are registered. The video surveillance system according to claim 3, wherein operations of a plurality of surveillance rooms are managed. 5. The video monitoring system according to claim 3, wherein the input device and the display device connected to the control CPU are configured by using a touch panel. 6. The demodulator comprises a control unit for controlling a tuner and a variable high frequency modem for transmission in accordance with an operation signal of a remote controller and a control command from the control CPU. Or the described video surveillance system.