JP2016015624A - Video monitoring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a video monitoring system which allows a user to perform more smooth switching operation of a monitoring video display screen from the operation screen of an operation terminal.SOLUTION: An operation terminal performs control for displaying, on a display, a line change screen having a main line selection button for connecting with a main line, and a reserved line selection button for connecting with a reserved line, a main line monitoring screen for displaying the video from a monitoring camera transmitted via the main line, by selection operation of the main line selection button on the line change screen, a reserved line monitoring screen for displaying the video from a monitoring camera transmitted via the reserved line, by selection operation of the reserved line selection button on the line change screen. When failure of the main line is detected from line state monitoring means, while displaying the main line monitoring screen on the display, automatic transition is made from the main line monitoring screen to the line change screen, thus notifying the failure of the main line on the display.

Description

  The present invention relates to a video surveillance system that photographs a predetermined area with a surveillance camera and monitors the captured video, and particularly when a surveillance video is transmitted using two different lines. The present invention relates to a video surveillance system that can easily switch between lines.

  Conventionally, video surveillance systems are installed in facilities visited by an unspecified number of people such as hotels, buildings, convenience stores, financial institutions, dams and roads for the purpose of crime prevention and accident prevention. This is because a person to be monitored is photographed by an imaging device such as a camera, and the video is transmitted to a monitoring terminal such as a management office or a security room, where the resident supervisor monitors it, and the purpose and necessity Be careful depending on it or record video.

  In a video surveillance system using an IP (Internet Protocol) network for video transmission, data communication is usually performed using any one of a line such as a ground line or a satellite line. However, for example, when data communication is performed using only a ground line such as a network line, if the network line between network line devices is interrupted due to a failure or the like, the line becomes unusable and data communication cannot be performed. Cannot monitor video on the terminal. In such a case, since it takes time to restore the line, there arises a problem that video monitoring cannot be performed until the restoration.

As described above, when a line failure occurs and data communication becomes impossible, it is undecided depending on the situation how long it takes to resume video monitoring.
Therefore, in order to minimize the time during which video monitoring cannot be performed, a video monitoring system has been proposed in which a line that is normally used and a line that is used in the event of a failure are used together and can be switched to each other.
Specifically, by providing a spare satellite line for the terrestrial line, even if the terrestrial line becomes faulty and becomes unusable, switching to the satellite line minimizes the time during which video monitoring cannot be performed. The video monitoring can be continued without waiting for the ground line to be restored.

  Patent Document 1 discloses a satellite line backup system that can automatically and quickly switch back after restoration of a satellite line. Patent Document 1 discloses a switching device that switches data transmission / reception to either a satellite channel or a terrestrial channel, and a line status detection control device that detects the status of the satellite channel and controls the switching device based on this status. It is described that when the satellite line is abnormal, the operation is switched to the ground line, and when the satellite line is normal for a predetermined time in the state of switching to the ground line, the operation is switched back to the satellite line.

JP-A-9-172400

  However, when two lines are used together as described above, it is important to minimize the time during which video monitoring cannot be performed. Therefore, anyone can change the monitoring video display screen using different lines. It is necessary to have a mechanism that can be easily and quickly performed without any erroneous operation.

  The present invention has been made in view of such a conventional situation, and when an operator performs an operation while watching a video transmitted using any one of two different lines, the operation is performed by the operator. An object of the present invention is to provide a video monitoring system capable of more smoothly switching a monitoring video display screen from a terminal operation screen.

  In order to achieve the above object, a video monitoring system according to the present invention includes a monitoring camera that captures a predetermined area, a video captured by the monitoring camera, received via a main line or a backup line, and the video displayed on the display unit. And an operation terminal that is connected to the operation terminal, and a line status monitoring unit that detects a failure of the main line and notifies the status of the main line to the operation terminal. In the system, the operation terminal includes a line switching screen having a main line selection button for connecting to the main line and a protection line selection button for connecting to the protection line, and the main line of the line switching screen. A main line monitoring screen for displaying an image from the monitoring camera transmitted through the main line by a selection operation for the main line, and the backup line selection button on the line switching screen. In the selection operation, control for displaying on the display unit the monitoring screen for the protection line that displays the video from the monitoring camera transmitted through the protection line is performed, and the monitoring for the main line is performed on the display unit. When a failure of the main line is detected from the line state monitoring means while the screen is displayed, an automatic transition from the main line monitoring screen to the line switching screen is performed, and the failure of the main line is displayed. It is characterized by notifying the department.

  In addition, the video monitoring system according to the present invention for achieving the above object is the video monitoring system described above, wherein the line status monitoring means detects the recovery of the main line and sends the status of the main line to the operation terminal. And when the operation terminal receives the state of the main line indicating the recovery of the main line from the line state monitoring means while displaying the standby line monitoring screen on the display unit, The restoration of the main line is notified on the display unit.

  Further, the video monitoring system according to the present invention for achieving the above object is the video monitoring system described above, wherein the operation terminal determines whether the line selected on the line switching screen matches the actual line information. By comparing and updating the current number of logins and the login limit, when the line status matches and is less than the login limit number, the login is executed and the screen is changed to each monitoring screen.

  According to the present invention, when performing a monitoring job while watching a video transmitted using one of two different lines, the operator can display the monitoring video more smoothly from the operation screen of the operation terminal. It is possible to provide a video monitoring system capable of performing a screen switching operation.

It is a block diagram which shows an example of the whole structure of the video surveillance system which concerns on Embodiment 1 of this invention. It is a figure which shows an example of the hardware constitutions of the operating terminal 70 used for the video surveillance system which concerns on Embodiment 1 of this invention. It is a figure which shows an example of the login operation screen at the time of logging in to a video surveillance system. It is a figure which shows an example of the monitoring screen for ground lines which displays the image | video of the monitoring area transmitted via the ground line. It is a figure which shows an example of the pop-up display screen at the time of terrestrial line failure occurrence. It is a figure which shows an example of the monitoring screen for satellite channels which displays the image | video of the monitoring area transmitted via the satellite channel. It is a figure which shows an example of the pop-up display screen at the time of ground line fault recovery. In the video surveillance system concerning Embodiment 1 of the present invention, it is a figure showing a processing sequence performed among receiving station 50, ITV control device 80, and operation terminal 70 at the time of line trouble occurrence. It is a figure which shows the processing sequence performed among the receiving station 50, the ITV control apparatus 80, and the operation terminal 70 at the time of line | wire failure recovery in the video surveillance system which concerns on Embodiment 1 of this invention. 6 is a flowchart illustrating an example of an operation of the operation terminal when a line failure occurs and is recovered in the video monitoring system according to the first embodiment of the present invention.

<Embodiment 1>
Hereinafter, a video surveillance system according to Embodiment 1 of the present invention will be described with reference to the drawings. In the description of each figure, the same reference numerals are assigned to components having a common function, and the description is omitted to avoid duplication as much as possible.

[Control configuration of video surveillance system]
A control configuration of the video surveillance system according to the first embodiment of the present invention will be described with reference to FIG.
FIG. 1 is a block diagram showing an example of the overall configuration of a video surveillance system according to Embodiment 1 of the present invention.
In FIG. 1, 10 is a monitoring camera that images a monitoring target area and outputs a video signal, 20 is a WEB encoder that digitizes and encodes a video signal input from the monitoring camera 10 and outputs it as video data, and 30 is a WEB. A transmitting station that sends video data input from the encoder to the terrestrial network line 40 or the satellite line 100, 40 is a network cable, wireless LAN (Local Area Network), or public line that transmits the video data output from the transmitting station 30 A network line that is a ground line such as 90, a communication satellite that mediates transmission of video data output from the transmitting station 30 to the receiving station 50 via the satellite line 100, and 50 a network line from the transmitting station 30 40 or a receiving station that receives video data via the satellite line 100, 60 is an ITV Industrial Television) ITV network line for system, 70 is an operation terminal for receiving video data transmitted via the network line 40 or satellite line 100, decoding it into a format capable of image display, and displaying it on the display unit, 80 Is an ITV control device that controls devices in the ITV system via the ITV network line 60.

  Here, in the first embodiment, the monitoring camera 10 and the WEB encoder 20 are described as being separated from each other. However, even if a WEB camera in which the monitoring camera 10 and the WEB encoder 20 are integrated is used, the same effect can be obtained. . The network line 40 includes network devices such as routers and hubs, and the devices connected to the network line 40 can communicate with each other via the network line 40.

The monitoring camera 10 shoots the monitoring target area, generates a video signal, and outputs it to the WEB encoder 20.
The WEB encoder 20 digitizes the video signal input from the surveillance camera 10, and compresses and encodes the image using a standard such as MPEG-4 (Moving Picture Experts Group phase 4) or MJPEG (Motion Joint Photographic Experts Group). And output to the transmitting station 30.

As shown in FIG. 1, the transmission station 30 includes a network line device 32, a satellite line device 33, a transmission antenna 34, and a control unit 31. The control unit 31 sends the video data input from the WEB encoder 20 to the network line device 32 during normal times and to the satellite line device 33 when a line failure occurs. The network line device 32 sends the input video data to the network line 40 as it is. The satellite line device 33 converts the frequency of the input video data into video data suitable for the satellite line 100 and sends it out from the transmitting antenna 34.
As illustrated in FIG. 1, the receiving station 50 includes a network line device 52, a satellite line device 53, a receiving antenna 54, and a control unit 51. The network line device 52 receives the video data input from the transmitting station 30 via the network line 40 and outputs it to the control unit 51. Further, the satellite line device 53 receives the video data transmitted through the satellite line 100 via the reception antenna 54, performs frequency conversion, and then outputs it to the control unit 51.
The control unit 51 includes a line failure detection unit 51a and a line switching unit 51b. The control unit 51 normally transmits the video data received via the network line device 52 to the operation terminal 70 via the ITV network line 60, but the line failure detection means 51a detects the failure of the network line 40. When detected, the line switching means 51 b switches the line and transmits the video data input from the satellite line device 53 to the operation terminal 70 via the ITV network line 60.

The ITV control device 80 controls the devices in the ITV system via the ITV network line 60. When the ITV control device 80 receives a line switching signal from the receiving station 50 to the satellite line 100, the ITV control unit 80 notifies the operation terminal 70 for the satellite line. When a request for switching to the monitoring screen is made and a line switching signal from the receiving station 50 to the network line 40 is received, a request for switching to the monitoring screen for the terrestrial line is made to the operation terminal 70.
The operation terminal 70 receives video data transmitted via the network line 40 or the satellite line 100, decodes the video data into a format capable of video display, and displays the video data on the display device 270. In addition, operations such as a video data switching request and a line switching request are performed on the GUI using an operation I / F such as a mouse or a keyboard.

FIG. 2 illustrates a hardware configuration of the operation terminal 70 used in the video monitoring system according to the first embodiment of the present invention.
As shown in FIG. 2, the hardware configuration of the operation terminal 70 includes a CPU 261, a main storage unit 262, an auxiliary storage unit 263, a display I / F 264, an input / output I / F 265, and a network I / F 266 that are connected by a bus 260. It is a form. The display I / F 264 is connected to the display device 270, and the input / output I / F 265 is connected to input / output devices such as a keyboard 280 and a mouse 282.

The CPU 261 performs control of each unit of the operation terminal 70 and execution of a program for realizing the function. The main storage unit 262 is realized by a semiconductor device such as a DRAM, and is an intermediate memory for loading and storing video data for display and a program executed by the CPU 261. The auxiliary storage unit 263 is realized by an HDD, a flash memory, or the like, and has a larger capacity than the main storage unit 262, and stores video data and programs. The display I / F 264 is an interface for connecting to the display device 270. The input / output I / F 265 is an interface for connecting to input / output devices such as a keyboard 280 and a mouse 282. The network I / F 266 is an interface for receiving an operation screen switching request from the ITV control device 80 and transmitting a line switching request to the ITV control device 80 via the ITV network line 60.
The display device 270 is a device such as an LCD (Liquid Crystal Display), for example, and is a device that displays video and images on its display unit. The operator operates the input / output device such as the keyboard 280 and the mouse 282 on the operation screen displayed on the display unit of the display device 270, for example, by operating a GUI (Graphical User Interface), thereby the ITV control device 80. A line switching request is transmitted to the terminal, and the ITV system such as the operation terminal 70 and the receiving station 50 is operated.

Here, an operation screen of the display device 270 operated by an operator who performs video monitoring using the operation terminal 70 will be described with reference to FIGS.
FIG. 3 is a diagram illustrating an example of a login operation screen when logging in to the video monitoring system. FIG. 4 is a diagram illustrating an example of a terrestrial line monitoring screen that displays a video of the monitoring area transmitted via the terrestrial line. FIG. 5 is a diagram showing an example of a pop-up display screen when a terrestrial line failure occurs. FIG. 6 is a diagram illustrating an example of a satellite channel monitoring screen that displays an image of the monitoring area transmitted via the satellite channel. FIG. 7 is a diagram showing an example of a pop-up display screen at the time of terrestrial line failure recovery.

The login operation screen 500 is displayed first after the operation terminal 70 of the video monitoring system is activated.
As shown in FIG. 3, the login operation screen 500 is divided into a terrestrial line column 501 at the top of the screen and a satellite line column 502 at the bottom of the screen. When using 520 (see FIG. 4), the operator of the operation terminal 70 logs in by pressing an arbitrary area selection button 503 in the column by clicking the mouse 282 or the like. The satellite line column 502 at the bottom of the screen is an arbitrary area in the column when the operator of the operation terminal 70 clicks the mouse 282 or the like when using the satellite line monitoring screen 530 (see FIG. 6) described later. The user presses the selection button 504 to log in.
Immediately after the operation terminal 70 of the video monitoring system is activated, the network line 40 that is a terrestrial line is used without fail, and the area selection button 503 of the monitoring area to be monitored is pressed from the terrestrial line column 501 to log in.
As shown in FIG. 4, the monitoring screen 520 for the ground line that displays the video of the predetermined monitoring area transmitted through the network line 40 that is the ground line is a monitoring camera installed in the monitoring area selected by the operator. 10, a video display unit 521 for displaying the monitoring video transmitted from 10, a video operation unit 522 for operating the monitoring video displayed on the video display unit 521, a list of monitoring areas in the video monitoring system and the selected monitoring area And an area list 523 indicating (for example, “area 3”).

As shown in FIG. 5, the pop-up display screen 510 is displayed when a failure occurs in the network line 40 that is a ground line. Switch the ITV system line to a satellite line. Is displayed on the operation screen of the display device 270 in a pop-up window.
As shown in FIG. 6, a satellite screen monitoring screen 530 that displays an image of a predetermined monitoring area transmitted via the satellite link 100 is transmitted from the monitoring camera 10 installed in the monitoring area selected by the operator. A video display unit 531 for displaying the monitored video, a video operation unit 532 for operating the monitoring video displayed on the video display unit 531, a list of monitoring areas in the video monitoring system and a selected monitoring area (for example, “ An area list 533 indicating "area 3").
As shown in FIG. 7, the pop-up display screen 540 is displayed when the failure of the network line 40, which is a ground line, is restored. Switch the ITV system line to the ground line. Is displayed on the operation screen of the display device 270 in a pop-up window.

[Processing sequence when a line failure occurs in a video surveillance system]
Next, processing performed between the receiving station 50, the ITV control device 80, and the operation terminal 70 in the video monitoring system according to the first embodiment of the present invention will be described with reference to FIG. . FIG. 8 is a diagram illustrating a processing sequence performed among the receiving station 50, the ITV control device 80, and the operation terminal 70 when a line failure occurs in the video monitoring system according to the first embodiment of the present invention.
Normally, the operation terminal 70 displays a terrestrial line monitoring screen 520 (see FIG. 4) on the operation screen of the display device 270, and the operator performs monitoring work while watching the video (step S101).
The control unit 51 of the receiving station 50 always monitors the state of the network line 40 with the line failure detection means 51a. When a failure of the network line 40 is detected (step S102), the line switching means 51b sends the satellite line 100 to the satellite line 100. Is switched (step S103), and a line switching signal to the satellite line 100 is transmitted to the ITV controller 80 (step S104).
When receiving a line switching signal from the receiving station 50 to the satellite line 100, the ITV control device 80 transmits a request for switching to the login operation screen 500 (see FIG. 3) by automatic transition to the operation terminal 70 (step 3). S105).

When receiving a request for switching to the login operation screen 500 from the ITV control device 80, the operation terminal 70 transmits a response signal to the ITV control device 80 (step S106).
In the operation terminal 70, automatic transition from the ground line monitoring screen 520 to the login operation screen 500 is performed (step S107), and a pop-up display screen 510 for prompting switching from the network line 40 to the satellite line 100 (FIG. 5) is displayed so as to overlap the login operation screen 500 (step S108). The content of the message displayed on the pop-up display screen 510 prompts the operator that an abnormality has occurred in the network line 40 and the switching operation to the satellite line monitoring screen 530 by the login operation screen 500. . At this time, in order to make sure that the operator understands the content of the message, while the pop-up display screen 510 is being displayed, the login operation screen 500 displayed earlier is not activated so that the login operation screen 500 cannot be operated. It may be in a state of being masked in gray so that no operation can be performed.

In the operation terminal 70, when the operator presses the “OK” button 511 on the pop-up display screen 510 displayed in step S108 (step S109), the pop-up display screen 510 is closed, the mask state is released, and the login operation is performed. The screen 500 can be operated (step S110). Here, in order to prevent erroneous operation, all the area selection buttons 503 in the terrestrial line column 501 that are not required to be used may be in an inactive state (a state that is masked in gray so that no operation can be performed).
In the operation terminal 70, when the operator selects an area selection button 504 for a desired monitoring area in the satellite line column 502 by operating the mouse 282 or the like on the login operation screen 500 (step S111), Login is performed, and a line switching request to the satellite line 100 is transmitted to the ITV control device 80 (step S112).

When receiving the line switching request from the operation terminal 70 to the satellite line 100, the ITV control device 80 transmits a response signal to the operation terminal 70 (step S113).
When receiving the response signal from the ITV control device 80, the operation terminal 70 displays the satellite line monitoring screen 530 on the operation screen of the display device 270 (step S114), and the operator displays the monitoring video of the satellite line monitoring screen 530. Watch while watching.

[Processing sequence for line failure recovery in video surveillance system]
Next, processing performed among the receiving station 50, the ITV control device 80, and the operation terminal 70 in the video surveillance system according to the first embodiment of the present invention will be described with reference to FIG. . FIG. 9 is a diagram illustrating a processing sequence performed among the receiving station 50, the ITV control device 80, and the operation terminal 70 when the line failure is recovered in the video monitoring system according to the first embodiment of the present invention.
After a line failure occurs in the network line 40, which is a ground line, the operation terminal 70 displays a satellite line monitoring screen 530 (see FIG. 6) on the operation screen of the display device 270, and the operator watches the monitoring video. Monitoring is performed (step S201).
When the line fault detecting means 51a detects the restoration of the failure of the network line 40 (step S202), the control unit 51 of the receiving station 50 performs line switching to the network line 40 by the line switching means 51b (step S203), and ITV control. A line switching signal to the network line 40 is transmitted to the device 80 (step S204).
When receiving the line switching signal from the receiving station 50 to the network line 40, the ITV control device 80 requests the operation terminal 70 to transition from the satellite line monitoring screen 530 to the login operation screen 500 (see FIG. 3). Is performed (step S205).

When receiving a request for switching from the ITV control device 80 to the login operation screen 500, the operation terminal 70 transmits a response signal to the ITV control device 80 (step S206).
The operation terminal 70 does not automatically transition from the satellite line monitoring screen 530 to the login operation screen 500, but is superimposed on the satellite line monitoring screen 530 to display a pop-up display for prompting switching from the satellite line 100 to the network line 40. A screen 540 (see FIG. 7) is displayed (step S207). The content of the message displayed on the pop-up display screen 540 prompts the operator that the failure of the network line 40 has been restored and the switching operation from the satellite line monitoring screen 530 to the ground line monitoring screen 520. ing. At this time, in order to ensure that the operator understands the content of the message, while the pop-up display screen 540 is being displayed, it is in an inactive state (grayed out so that no operation can be performed) so that the satellite line monitoring screen 530 cannot be operated. It may be in a masked state).

In the operation terminal 70, when the operator presses the “OK” button 541 on the pop-up display screen 540 displayed in step S207 (step S208), the pop-up display screen 540 is closed (step S209), and the mask state is released. Thus, the satellite screen monitoring screen 530 can be operated.
In the operation terminal 70, the operator manually shifts to the login operation screen 500 at an arbitrary timing (step S210). At this time, the automatic transition from the satellite line screen 530 to the login operation screen 500 is not performed as in the case where a failure occurs in the network line 40. This is because the restoration of the network line 40 is not urgent, and other system operations performed at the time of restoration of the network line 40 can be arbitrarily continued. Note that, at the time of recovery, whether the transition to the login operation screen 500 is performed manually or automatically may be arbitrarily set on the system.
In the operation terminal 70, when the operator selects an area selection button 503 of a desired monitoring area in the ground line column 501 by operating the mouse 282 or the like on the login operation screen 500 (step S211), Login is performed, and a line switching request to the network line 40 is transmitted to the ITV controller 80 (step S212).

When receiving a line switching request from the operation terminal 70 to the network line 40, the ITV control device 80 transmits a response signal to the operation terminal 70 (step S213).
When the operation terminal 70 receives the response signal from the ITV control device 80, the operation terminal 70 displays the terrestrial line monitoring screen 520 on the operation screen of the display device 270 (step S214), and the operator displays the monitoring video of the terrestrial line monitoring screen 520. Watch while watching.

[Operation of operation terminal in video surveillance system]
Next, in the video monitoring system according to the first embodiment of the present invention, the operation of the operation terminal 70 when a line failure occurs and is restored will be described with reference to FIG.
FIG. 10 is a flowchart illustrating an example of the operation of the operation terminal 70 when a line failure occurs and is recovered in the video monitoring system according to the first embodiment of the present invention.

When the operator activates the operation terminal 70 (step S301), a login operation screen 500 shown in FIG. 3 is displayed on the operation screen of the display device 270 of the operation terminal 70 (step S302). Immediately after the operation terminal 70 is activated, the network line 40 that is a terrestrial line is always used, so that the area selection button 503 of the monitoring area to be monitored is pressed from the terrestrial line column 501 to log in. Therefore, in order to prevent an erroneous operation, all area selection buttons 504 in the satellite line column 502 of the login operation screen 500 may be in an inactive state (a state masked in gray so that the button cannot be pressed).
On the displayed login operation screen 500, when the operator operates the mouse 282 or the like to select “area 3” from the area selection button 503 in the ground line column 501, for example, a network line that is a ground line The login (connection) to the surveillance camera 10 installed in “Area 3” is made via 40 (step S303).
The ground line monitoring screen 520 shown in FIG. 4 is displayed on the display device 270 of the operation terminal 70 (step S304), and the monitoring video of “Area 3” is displayed on the video display unit 521.

Here, in step S305, it is determined whether or not a failure has occurred in the network line 40, which is a ground line. If no failure has occurred (NO), the process returns to step S304, and the failure is detected. If it has occurred (YES), the process proceeds to step S306.
On the display device 270 of the operation terminal 70, an automatic transition from the ground line monitoring screen 520 to the login operation screen 500 is performed (step S306), and a pop-up display for prompting the switching from the network line 40 to the satellite line 100 is performed. A screen 510 (see FIG. 5) is displayed so as to overlap the login operation screen 500 (step S307). The content of the message displayed on the pop-up display screen 510 prompts the operator that an abnormality has occurred in the network line 40 and the switching operation to the satellite line monitoring screen 530 by the login operation screen 500. . At this time, in order to make sure that the operator knows the content of the message, while the pop-up display screen 510 is being displayed, the login operation screen 500 displayed previously is all inactive (the login operation screen 500). In a state where it is masked in gray so that no operations can be performed.

When the operator presses the “OK” button 511 on the pop-up display screen 510 displayed in step S307, the pop-up display screen 510 is closed, the mask state is released, and the login operation screen 500 can be operated ( Step S308). Here, in order to prevent erroneous operation, all the area selection buttons 503 in the terrestrial line column 501 that do not need to be used may all be inactive (a state that is masked in gray so that no operation can be performed). .
In the operation terminal 70, the login to the satellite line 100 is performed when the operator selects an area selection button 504 of a desired monitoring area in the satellite line column 502 by operating the mouse 282 or the like on the login operation screen 500. (Step S310).
A satellite line monitoring screen 530 shown in FIG. 6 is displayed on the display device 270 of the operation terminal 70 (step S311), and a monitoring video of the selected monitoring area is displayed on the video display unit 521.

  Here, in step S312, it is determined whether or not the network line 40, which is a terrestrial line, has recovered from the failure. If the network line 40 has not recovered from the failure (NO), the process returns to step S311 to recover from the failure. If so (YES), the process proceeds to step S313.

The operation terminal 70 does not automatically transition from the satellite line monitoring screen 530 to the login operation screen 500, but is superimposed on the satellite line monitoring screen 530 to display a pop-up display for prompting switching from the satellite line 100 to the network line 40. A screen 540 (see FIG. 7) is displayed (step S313). The content of the message displayed on the pop-up display screen 540 prompts the operator that the failure of the network line 40 has been restored and the switching operation from the satellite line monitoring screen 530 to the ground line monitoring screen 520. ing. At this time, in order to ensure that the operator understands the content of the message, while the pop-up display screen 540 is being displayed, it is in an inactive state (grayed out so that no operation can be performed) so that the satellite line monitoring screen 530 cannot be operated. It may be in a masked state).
When the operator presses the “OK” button 541 on the pop-up display screen 540 displayed in step S313 (step S314), the pop-up display screen 540 is closed, the mask state is released, and the satellite line monitoring screen 530 is displayed. Operation becomes possible (step S315).

  Here, the operator manually shifts to the login operation screen 500 at an arbitrary timing (step S316). At this time, the automatic transition from the satellite line screen 530 to the login operation screen 500 is not performed as in the case where a failure occurs in the network line 40. This is because the restoration of the network line 40 is not urgent, and other system operations performed at the time of restoration of the network line 40 can be arbitrarily continued. Note that, at the time of recovery, whether the transition to the login operation screen 500 is performed manually or automatically may be arbitrarily set on the system. If it is set to automatically transition to the login operation screen 500, S315 is skipped.

In the operation terminal 70, when the operator selects an area selection button 503 for a desired monitoring area in the ground line column 501 by operating the mouse 282 or the like on the login operation screen 500, login to the network line 40 is performed. (Step S303). Here, in order to prevent an erroneous operation, all the area selection buttons 504 in the satellite line column 504 that do not need to be used may be all inactive (masked in gray so that no operation can be performed). .
In step S303, the operator selects the area selection button 503 of the desired monitoring area from the ground line column 503 and logs in, so that the ground line monitoring screen 520 of the area is displayed on the operation screen of the display device 270. Thus, the operator can perform video monitoring using the network line 40 (step S304).

  Note that the switching operation from the terrestrial line monitoring screen 520 to the satellite line monitoring screen 530 at the time of failure of the network line 40 that is a terrestrial line needs to be performed by an appropriate operator at an appropriate timing. If there is a login authority so that only the operator can access the login operation screen 500, or there are a plurality of monitoring areas each having independent lines as in the embodiment taken up in the above procedure, when a line failure occurs Processing for preventing an erroneous operation, such as guiding the operation by blinking the login button (area selection button) of the monitoring area where the screen needs to be switched, may be further added.

  As described above, according to the video monitoring system according to the first embodiment of the present invention, when performing a monitoring job while watching a video transmitted using any one of two different lines, an operation is performed. It is possible to provide a video monitoring system that allows a user to more smoothly switch the monitoring video display screen from the operation screen of the operation terminal.

<Other embodiments>
Hereinafter, a video surveillance system according to another embodiment of the present invention will be described in detail.
The video surveillance system according to another embodiment of the present invention has, for example, the following characteristics with respect to the video surveillance system according to Embodiment 1 of the present invention.
(1) In the video monitoring system, the line status is regularly monitored. When the line status changes, the login operation screen 500 of the operation terminal 70 is displayed, and when the login selection button is pressed, the line selected by the operator is displayed. By comparing and updating whether or not the actual line information matches the current number of logins and the login limit, if the line status matches and is less than the login limit number, login is executed and transition to each operation screen It is set as the structure which can do. That is, the video monitoring system is characterized by providing a line switching function and a login number limiting function. Information about the current number of logins and the number of login restrictions may be held by the ITV control device 80, or may be held in an external database or the like. Further, the login limit number may be changed according to the line state. For example, when a failure occurs in the network line 40 and the satellite line 100 is switched to the satellite line 100, the satellite line 100 is narrower than the network line 40. Therefore, it is preferable to control the number of logins to be reduced.
(2) The line state of the network line 40 is held, and when the line switching signal is received from the receiving station 50, the ITV control unit 80 that updates the line state of the network line 40 and the ITV control unit 80 to the network line 40 When the operation terminal 70 confirms that the line state of the network line 40 has been updated on the ITV control device 80 in the video monitoring system including the operation terminal 70 that periodically monitors the line state, the login operation screen 500 is displayed. It is characterized in that it is automatically or manually transitioned to. The line state of the network line 40 may be held in an external database or the like instead of the ITV control device 80.

  As described above, according to the video monitoring system according to another embodiment of the present invention, when performing a monitoring job while watching a video transmitted using any one of two different lines, It is possible to provide a video monitoring system that allows an operator to more smoothly switch the monitoring video display screen from the operation screen of the operation terminal.

  Furthermore, a monitoring camera that captures a predetermined area, an image that is captured by the monitoring camera is received via a main line or a backup line, and an operation terminal that displays the image on the display unit is connected to the operation terminal. And a line status monitoring means for detecting a fault on the main line and notifying the status of the main line to the operation terminal. In the video monitoring system, the operation terminal selects the main line for connection to the main line. The video from the surveillance camera sent via the main line is displayed by selecting the line switching screen with the button and the protection line selection button for connecting to the protection line and the main line selection button on the line switching screen. The monitoring screen for the main line to be displayed and the monitoring screen for the standby line that displays the video from the monitoring camera transmitted via the protection line by the selection operation of the selection button for the protection line on the line switching screen are displayed. When a main line failure is detected from the line status monitoring means while the main line monitoring screen is displayed on the display unit, automatic transition from the main line monitoring screen to the line switching screen is performed. The operator can easily and quickly switch between the main line monitoring screen and the protection line monitoring screen through the line switching screen. Can do.

  The line state monitoring means detects the recovery of the main line, notifies the operation terminal of the state of the main line, and the operation terminal displays the standby line monitoring screen on the display unit. When the main line status indicating the recovery of the main line is received from the main line, the main line recovery is notified on the display unit. System operation can be continued arbitrarily without being interrupted.

  In addition, the operation terminal compares the current login number with the login limit and updates whether the line selected on the line switching screen matches the actual line information, and updates the login state. If it is less, the login is executed and the screen is shifted to each monitoring screen. Therefore, the congestion of the line can be suppressed by the number of login restrictions.

  Note that the configuration and operation of the above embodiment are examples, and it is needless to say that the configuration and operation can be appropriately changed and executed without departing from the gist of the present invention.

10: surveillance camera, 20: WEB encoder, 30: transmitting station, 31: control unit, 32: network line device, 33: satellite line device, 34: antenna for transmission, 40: network line, 50: receiving station, 51: Control unit, 51a: line failure detection means, 51b: line switching means, 52: network line apparatus, 53: satellite line apparatus, 54: receiving antenna, 60: ITV network line, 70: operation terminal, 80: ITV control apparatus , 90: communication satellite, 100: satellite line, 260: bus, 261: CPU, 262: main storage unit, 263: auxiliary storage unit, 264: display I / F, 265: input / output I / F, 266: network I / F, 270: display device, 280: keyboard, 282: mouse, 500: login operation screen, 501: ground line column, 502: satellite line 503: Area selection button, 504: Area selection button, 510: Pop-up display screen, 511: “OK” button, 520: Monitoring screen for ground line, 521: Video display unit, 522: Video operation unit, 523: Area list 530: Satellite line monitoring screen, 531: Video display unit, 532: Video operation unit, 533: Area list, 540: Pop-up display screen, 541: “OK” button.

Claims (3)

A monitoring camera that captures a predetermined area, an operation terminal that receives a video captured by the monitoring camera via a main line or a backup line, and displays the video on a display unit; and is connected to the operation terminal, In a video monitoring system configured to include a line state monitoring unit that detects a failure of the main line and notifies the state of the main line to the operation terminal,
The operation terminal is
A line switching screen having a selection button for a main line for connecting to the main line and a selection button for a protection line for connecting to the protection line;
In the selection operation of the selection button for the main line of the line switching screen, a monitoring screen for the main line that displays the video from the monitoring camera transmitted through the main line;
In the selection operation of the selection button for the protection line on the line switching screen, the monitoring screen for the protection line that displays the video from the monitoring camera transmitted through the protection line;
Is displayed on the display unit,
While the main line monitoring screen is displayed on the display unit, when a failure of the main line is detected from the line state monitoring means, an automatic transition from the main line monitoring screen to the line switching screen is performed. An image monitoring system for notifying a failure of the main line on the display unit. The video monitoring system according to claim 1,
The line state monitoring means detects recovery of the main line, notifies the operation terminal of the state of the main line,
When the operation terminal receives the state of the main line indicating the recovery of the main line from the line state monitoring means while displaying the standby line monitoring screen on the display unit, A video surveillance system for notifying restoration on the display unit. The video surveillance system according to claim 1 or 2,
The operation terminal determines whether the line selected on the line switching screen matches the actual line information, and compares and updates the current login number and the login limit, thereby matching the line status and the login limit number. If it is less than this, the video monitoring system is characterized in that login is executed and transition to each monitoring screen is performed.