JP2008061066A - Monitoring apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a monitoring system for video-recording a plurality of monitor images, and automatically selecting and displaying a monitor image in which presence of abnormality is recognized, at that time. <P>SOLUTION: A monitoring apparatus 10 receives a plurality of monitor data items each containing moving image data shot by cameras 20 installed at a plurality of positions, stores the plurality of received monitor data items, selects at least one of the relevant monitor data items based on evaluation about time changes of the plurality of stored monitor data items, reproduces and displays the moving image data contained in the selected monitor data item. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a monitoring apparatus that selectively displays a plurality of monitoring data.

  In recent years, interest in security has increased, and the need for surveillance cameras and the like has increased not only in offices but also at home. In such a situation, for example, a system that can record and reproduce images by installing a monitoring camera in a front door, a garage, or the like is used.

Furthermore, in order to monitor a plurality of locations, a plurality of surveillance cameras are often installed. For example, Patent Literature 1 discloses a television door phone that records a captured image by a camera provided for various uses, receives a selection input by a user, and reproduces the recorded image. Here, it is intended that a plurality of monitoring images are displayed in a predetermined order such as by use or in time series, thereby facilitating the confirmation work of the recorded monitoring images.
JP 2006-157178 A

  When a plurality of surveillance cameras are installed, it is conceivable that it is difficult to secure a place in order to prepare monitors for displaying surveillance images. If the number of monitors is reduced, all monitoring images cannot be confirmed at the same time, so the monitoring effect may be reduced. For example, if a monitoring image with an abnormality is not displayed, the user cannot notice it, and there is a possibility that discovery of the abnormality will be delayed.

  For example, the above-described method of Patent Document 1 also aims to improve the efficiency of checking a recorded surveillance image, and shows important ones among a plurality of images being photographed in a timely manner to attract the user's attention. That is still difficult.

  Conventionally, a user operation is required to switch the monitoring image. Therefore, in order to improve security, a monitoring system that automatically switches to a monitoring image that requires user attention is desired.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a monitoring system that records a plurality of monitoring images and automatically selects and displays monitoring images that are recognized as being abnormal at that time.

  For the above purpose, the following are specifically provided.

(1) A monitoring device that receives a plurality of monitoring data, each including moving image data captured by cameras installed at a plurality of locations, and displays the moving image data on a screen,
Means for storing a plurality of received monitoring data;
Means for selecting at least one of the monitoring data based on the evaluation of temporal changes of the plurality of monitoring data stored;
Means for reproducing and displaying the moving image data included in the selected monitoring data.

  According to such a configuration, the monitoring device receives a plurality of monitoring data including moving image data captured by cameras installed in a plurality of locations, stores the received plurality of monitoring data, Based on the evaluation of temporal changes of the plurality of stored monitoring data, at least one of the monitoring data is selected, and the moving image data included in the selected monitoring data is reproduced and displayed.

  Accordingly, the monitoring device selects monitoring data to be displayed in a timely manner by evaluating temporal changes of the plurality of monitoring data. As a result, since the monitoring apparatus can easily make the user visually recognize the monitoring data to be noted, there is a possibility that the user can effectively perform monitoring using a plurality of cameras.

  (2) The monitoring system according to (1), wherein the reproduction display unit divides the screen and reproduces and displays the selected plurality of monitoring data simultaneously.

  According to such a configuration, the monitoring device divides the screen and reproduces and displays the selected plurality of monitoring data at the same time. Therefore, even when there are a plurality of monitoring data to be noticed efficiently, The user may be able to see them.

  The number of screen divisions is not limited, and the number that can be displayed on the screen may be set in advance. Further, the screen division may be switched as appropriate to, for example, two divisions or four divisions according to the number of selected monitoring data. Here, when the number of selected monitoring data exceeds the number that can be displayed, a selection input may be received from the user, or may be automatically switched and displayed.

(3) The monitoring data further includes audio data collected by at least one microphone in the vicinity of the camera,
The monitoring apparatus according to (1) or (2), further comprising means for reproducing the audio data in synchronization with the moving image data to be reproduced and displayed.

  According to such a configuration, the monitoring device receives sound data collected by at least one microphone in the vicinity of the camera as monitoring data, and reproduces it in synchronization with the moving image data to be reproduced and displayed.

  As a result, since the monitoring data is obtained by adding sound to the image, the user may be able to effectively grasp the status of the monitoring area.

(4) means for transmitting and receiving call data to and from the interphone handset provided with the camera and the microphone;
Means for receiving a signal indicating the start of the call,
The monitoring apparatus according to (3), wherein a moving image captured by a camera provided in the interphone slave unit is displayed with the start of the call.

  According to such a configuration, the monitoring device transmits and receives call data to and from the interphone slave device including the camera and the microphone, and in response to receiving a signal indicating the start of the call, A moving image taken by a camera provided in the interphone slave unit is displayed.

  Accordingly, there is a possibility that the monitoring device can effectively monitor the house entrance without increasing the number of devices or enlarging the device by combining with the function of the interphone.

  (5) The monitoring device according to any one of (1) to (4), wherein the monitoring data further includes a signal from a sensor that senses the approach of a human body in the vicinity of the camera.

  According to such a configuration, the monitoring apparatus can further include a signal of the sensor in the monitoring data by further installing a sensor that detects the approach of the human body by a method such as infrared detection.

  This increases the possibility that the monitoring apparatus can accurately determine a change such as the approach of a person, and the user may be able to perform effective monitoring.

  (6) The selection means selects the monitoring data when the time change of the stored monitoring data is greater than or equal to a predetermined threshold value. (1) to (5) Monitoring device.

  According to such a configuration, the monitoring device selects the monitoring data when the time change of the stored monitoring data is equal to or greater than a predetermined threshold. That is, when a moving image, sound, sensor signal, or the like included in the monitoring data changes beyond a predetermined range, it is determined as abnormal data and presented to the user.

  As a result, the monitoring device automatically detects an abnormality and presents it to the user, so there is a possibility that effective monitoring can be performed.

  (7) The monitoring device according to (6), wherein the storing unit deletes, from the storage, a portion of the monitoring data in which the time change does not satisfy a predetermined threshold.

  According to such a configuration, the monitoring device does not store a portion of the monitoring data in which the time change does not satisfy the predetermined threshold, that is, a portion that is determined not to be abnormal. As a result, the monitoring device can reduce the amount of data to be stored, and further, unnecessary data can be reduced, which may facilitate the retrieval of important data.

  (8) The monitoring apparatus according to (6) or (7), further comprising means for reproducing predetermined audio data stored in advance when the time change of the monitoring data becomes equal to or greater than a predetermined threshold.

  According to such a configuration, when there is an abnormality in the monitoring data, the monitoring device can reproduce the predetermined audio data stored in advance and notify the user that there is an abnormality. Therefore, since the user can easily notice an abnormality, safety can be improved.

  (9) The device according to any one of (1) to (8), further comprising means for transmitting the stored monitoring data to the communication terminal in response to a request from a communication terminal connected via a communication network. Monitoring device.

  According to such a configuration, the monitoring device can transmit the stored monitoring data to another communication terminal via the communication network.

  As a result, monitoring data can be referred to from a remote location, and security can be improved by monitoring by a third party. Furthermore, even when the user is out, the user can refer to the monitoring data by accessing from a mobile communication terminal or the like.

  (10) The monitoring device according to (9), further including means for transmitting to the communication terminal data indicating that the time change has occurred with respect to the selected monitoring data.

  According to such a configuration, the monitoring device transmits data indicating that the time change has occurred to the communication terminal. As a result, the monitoring device can timely warn a user or third party who is out, and there is a possibility that a delay in coping can be prevented.

(11) means for receiving content data to be presented to the user from the communication terminal;
The monitoring apparatus according to (9) or (10), further comprising means for displaying the content instead of the monitoring data.

  According to such a configuration, the monitoring device can receive and display the content data via the communication network.

  Accordingly, the monitoring apparatus can present various information such as crime prevention information collected via a communication network and notification information from an administrator to the user. As a result, there is a possibility of improving the security of the entire region or group.

(12) means for receiving a television broadcast and converting the signal into a plurality of channels;
Means for transmitting video data and audio data of the selected channel to a television monitor in response to receiving a selection input of the channel from a user,
The monitoring apparatus according to any one of (1) to (11), wherein when the selection input of a predetermined channel not included in the television broadcast is received, the monitoring data is transmitted to the television monitor. .

  According to such a configuration, the monitoring device receives the television broadcast, converts the signal into a plurality of channels, and receives the selection input of the channel from the user, and the video of the channel selected. Data and audio data are transmitted to the television monitor, and when the selection input of a predetermined channel not included in the television broadcast is received, the monitoring data is transmitted to the television monitor.

  As a result, since the monitoring device sends monitoring data to an empty TV broadcast channel, for example, by combining with an existing CATV system, a large monitor can be efficiently used. Furthermore, the user can switch from the television broadcast to the display of the monitoring data in a timely manner by using a remote controller attached to the television.

(13) A method of receiving a plurality of monitoring data including moving image data captured by cameras installed at a plurality of locations, and displaying the moving image data on a screen,
Storing a plurality of received monitoring data;
Selecting at least one of the monitoring data based on the evaluation of temporal changes of the plurality of the monitoring data stored;
Replaying and displaying the moving image data included in the selected monitoring data.

  According to such a configuration, the same effect as in (1) can be expected by performing the method.

  According to the monitoring apparatus of the present invention, it is possible to record monitoring data such as a plurality of monitoring images and automatically select monitoring data that is recognized as having an abnormality and present it to the user.

  An example of a preferred embodiment according to the present invention will be described below based on the drawings.

[System configuration]
FIG. 1 is a block diagram showing a system configuration according to an example of a preferred embodiment of the present invention.

  The monitoring apparatus 10 includes a receiving unit 110, a control unit 120, a storage unit 130, an input unit 140, an output unit 150, and a communication control unit 160.

  The receiving unit 110 receives image data captured by the plurality of cameras 20. Here, the input is only the image data from the camera 20, but the present invention is not limited to this. Audio data, signals from other sensors (for example, human body sensor, temperature sensor, gas sensor, smoke sensor, etc.), lock detection data For example, various monitoring data may be received.

  The control unit 120 is an information processing unit (CPU) that performs calculation and processing of information, and controls the entire monitoring device 10. The control unit 120 reads and executes various programs stored in the storage unit 130 as appropriate, thereby cooperating with the above-described hardware, and based on various data received by the reception unit 110, various functions according to the present invention. Is realized.

  The storage unit 130 may include a local memory used for program execution in combination with the control unit 120, a large-capacity bulk memory, and a cache memory used for efficiently searching the bulk memory. The computer readable medium that implements the storage unit 130 may include an electrical, magnetic, optical, or electromagnetic implementation.

  The input unit 140 receives an operation input by the user, and includes a control panel including various operation buttons and a touch panel. The input unit 140 can be connected to the monitoring apparatus 10 directly or via an intervening I / O controller. The input unit 140 may be a receiving unit such as infrared communication. In this case, the input unit 140 transmits an operation input signal from a remote controller operated by the user to transmit a control signal to the control unit 120. .

  The output unit 150 displays a screen of processing results by the control unit 120 or emits audio data, and presents various information to the user of the monitoring device 10. For example, a display device such as a liquid crystal display (LCD), a speaker, and the like are included. The output unit 150 can be connected to the computer directly or via an intervening I / O controller.

  The communication control unit 160 is a network adapter that enables the monitoring device 10 to be connected to another arithmetic processing system or a storage device via a dedicated network or a public network. The communication control unit 160 transmits various monitoring data stored in the storage unit 130 to the communication terminal 30 via the communication line.

[Overview of monitoring equipment]
FIG. 2 is a diagram illustrating an appearance of the monitoring device 10 according to an example of the preferred embodiment of the present invention. In the present embodiment, the monitoring device 10 is a device in which various functions according to the present invention are added to an interphone. The interphone camera and the other three cameras 20 are connected to receive respective image data.

  The monitoring device 10 includes an interphone controller 15, a speaker 16, a microphone 17, and a receiver 18 as interphone functions. The user talks with an outdoor visitor via the receiver 18. At that time, the door can be unlocked / locked by the interphone controller 15. Further, by pressing the call button, a hands-free call can be made by the speaker 16 and the microphone 17 instead of the receiver 18.

  The liquid crystal display 11 displays an image from the camera 20 included in the interphone slave unit and an image from another camera 20 connected to the monitoring apparatus 10. The display controller 13 is used to switch the images of the four cameras 20. A selection input from the user is received by a camera switching button of the display controller 13, and an image of the selected camera 20 is displayed on the liquid crystal display 11.

  The monitoring device 10 reproduces and displays not only the image currently captured by the camera 20 but also the past image stored in the storage unit 130. The operation buttons provided in the display controller 13 accept operations such as playback, fast forward, rewind, and stop from the user, and display an image corresponding to the operation on the liquid crystal display 11. Note that the sound synchronized with the image may be emitted from the speaker 16.

  The sensor status display unit 12 displays information such as the unlocked / locked state of the front door, fire / smoke detection, gas detection, and CO detection. Each of these notifies the user of an abnormality by receiving a signal from the corresponding sensor. Here, each sensor may be provided in the vicinity of the camera 20, and in that case, an image of a place where an abnormality is found by the sensor may be displayed on the liquid crystal display 11 in conjunction with the image of the camera 20. It becomes possible.

  When the hotline button 14 receives a press from the user in an emergency, the hotline button 14 transmits report data to the communication terminal 30 installed in the management center or the like via the communication line. Thus, the management center can take measures such as contacting other users and reporting to the police depending on the situation.

  The notification to the communication terminal 30 may be automatically performed by the monitoring apparatus 10 when an abnormality of the various sensors described above is detected, or when an abnormality is detected from the image of the camera 20. Various conventional methods can be used as a method for detecting an abnormality from an image. For example, depending on the installation location of the camera 20, an abnormality may be caused when the amount of change in image data exceeds a predetermined threshold. .

  The external connection terminal 19 is a terminal for connection with an external device such as transferring monitoring data stored in the storage unit 130 to an external storage device, and may be a USB terminal or the like.

[Monitoring data]
FIG. 3 is a diagram showing the monitoring data storage timing according to an example of the preferred embodiment of the present invention.

  The image data taken by the camera 20 is stored in the storage unit 130, but some of the parts are not important for security purposes. They not only compress the storage area but also make it difficult to find important image portions.

  Therefore, a record is kept while an abnormality is detected. For example, monitoring data from a predetermined time before the abnormality is detected (before the user can confirm the occurrence of the abnormality) is retained as a record. On the other hand, previous monitoring data is discarded as unnecessary.

  The monitoring data to be stored is stored in, for example, a monitoring data table shown in FIG. The monitoring data table stores data file names such as start time, end time, image data, and other sensor signals together with the identification ID.

[Main processing]
FIG. 5 is a diagram showing a flow of main processing according to an example of the preferred embodiment of the present invention. Hereinafter, the monitoring data will be described by limiting to image data photographed by the camera 20. However, as described above, monitoring data other than image data can be combined, and can be appropriately read in the following description.

  In step S11, the monitoring apparatus 10 starts recording image data received from the camera 20 when power is turned on. Image data is stored in a monitoring data table (FIG. 4) for each monitoring location (camera installation location).

  In step S12, the monitoring apparatus 10 monitors the time change of the image data and determines whether there is an abnormality. Specifically, for example, when the amount of change in the image data exceeds a preset threshold, it is determined that there is an abnormality. Alternatively, it may be determined that the change is abnormal when the change continues for a predetermined time or more, and the case where the visiting salesperson is sitting for a long time may be dealt with. If the monitoring apparatus 10 determines that there is an abnormality, the process proceeds to step S13, and if there is no abnormality, the process proceeds to step S14.

  In step S <b> 13, the monitoring apparatus 10 selects image data to be noticed by the user. Specifically, the image data determined to be abnormal in step S12 is selected. Since four cameras 20 are installed in this embodiment, the number of image data to be selected is 1 to 4.

  Here, in order to notify the user that there is an abnormality, the voice data stored in advance may be reproduced and sent from the speaker 16 as an alarm. As a result, the user's attention can be immediately directed to the monitoring device 10, and the possibility of missing an important image can be expected to be reduced.

  In step S14, the monitoring apparatus 10 performs display switching of the liquid crystal display 11 according to the number of image data selected by detecting an abnormality. Details will be described later with reference to FIG.

  In step S15, the monitoring device 10 receives an input from the user as to whether or not to end the process. If the input indicating that the process is to be terminated is not received, the monitoring apparatus 10 returns the process to step S12 and continues recording and displaying the image data.

  In step S16, the monitoring apparatus 10 ends the recording of the image data in response to accepting the processing end input in step S15. Thereby, the value of the end time field of the monitoring data table (FIG. 4) is determined.

  In addition, although the time of step S11 and step S16 is memorize | stored in the start time and end time of a monitoring data table, when deletion of an unnecessary part is performed as mentioned above, it is not this limitation, but a necessary part Is appropriately selected, and its start time and end time are stored.

[Display switching process]
FIG. 6 is a diagram showing a flow of display switching processing according to an example of the preferred embodiment of the present invention. This process is called at step S14 of the main process (FIG. 5).

  In step S <b> 21, the monitoring apparatus 10 branches the process according to the number of image data in which an abnormality has been detected in the main process. Specifically, when the number is 4 or 3, the monitoring apparatus 10 moves the process to step S22, when the number is 2, the process moves to step S23, and when the number is 1, The process moves to step S24, and if the number is 0, the process moves to step S25.

  In step S22, the monitoring apparatus 10 divides the screen into four parts on the liquid crystal display 11, and displays the selected 3 or 4 image data. When the number of image data is 3, 1 out of 4 is unused. Alternatively, image data that has not been selected may be displayed.

  In the screen display example of the monitoring apparatus 10 shown in FIG. 7, three pieces of image data are displayed on a screen divided into four. Although the lower right portion is not displayed, the unselected image data may be displayed, and the selected three image data may be distinguished by emphasizing the outline of the display portion.

  In step S23, the monitoring apparatus 10 divides the screen into two parts on the liquid crystal display 11, and displays the selected two pieces of image data. In this case, only the second image data in which the abnormality is detected among the four image data is displayed, so that the user can be alerted. In the screen display example of the monitoring apparatus 10 shown in FIG. 8, two pieces of image data are displayed on a screen divided into two.

  In step S24, the monitoring apparatus 10 displays the selected one image data on the full screen on the liquid crystal display 11 (not shown). As a result, only the image data in which the abnormality is detected is displayed, so that the user pays great attention to the image data.

  In step S <b> 25, since there is no selected image data, the monitoring apparatus 10 displays another content data received from the communication terminal 30. In the screen display example of the monitoring device 10 shown in FIG. 9, a news telop of alert information is displayed. Even if there is no selected image data, the image data may be displayed as shown in FIG. Thereafter, for example, when content data is received from the communication terminal 30, the display may be switched to the content data.

  In the present embodiment, the number of screen divisions is two or four. However, the number of divisions is not limited depending on the number of cameras 20. However, it is desirable to set the upper limit of the number of divisions in advance in consideration of ease of visual recognition by the user. At this time, for example, when the selected image data exceeds the upper limit, an image to be displayed may be determined by receiving a selection input from the user. Alternatively, the selected image data may be sequentially switched and displayed at a predetermined time interval.

[Report processing]
FIG. 10 is a diagram showing a flow of notification processing according to an example of the preferred embodiment of the present invention. By this processing, information is transmitted from the monitoring apparatus 10 to the management center or the like, and a countermeasure corresponding to the information can be performed.

  The monitoring device 10 starts recording image data in step S31, and detects an abnormality in the image data in step S32. Here, when no abnormality is detected, monitoring is continued, and data transmission / reception with the communication terminal 30 does not occur.

  If an abnormality in the image data is detected in step S32, the monitoring device 10 issues a report in step S33. Specifically, report data indicating that there is an abnormality is transmitted to the communication terminal 30 together with data for identifying the image data in which the abnormality is detected (step S34).

  Here, the trigger of notification may be automatic processing upon detection of an abnormality in the image data, but may be performed, for example, by accepting pressing of the hotline button 14 (FIG. 2) by the user.

  In step S35, the communication terminal 30 transmits data requesting image data stored in the monitoring device 10 to the monitoring device 10 in accordance with the notification data received in step S34.

  In step S36, the monitoring apparatus 10 transmits image data corresponding to the request in step S35 to the communication terminal 30. As a result, the communication terminal 30 can also reproduce and display the image data, and can cope with the notification from a remote location such as a management center.

[Linkage configuration with TV]
FIG. 11 is a schematic diagram showing a configuration in which the monitoring device 10 according to an example of the preferred embodiment of the present invention is combined with a television.

  A tuner 40 that receives a television broadcast and transmits a signal to each channel of the monitor 50 is connected to the monitoring device 10. When the tuner 40 receives a channel change signal from the controller 60, the tuner 40 transmits the signal of the corresponding channel to the monitor 50, and the TV image of the corresponding channel is displayed on the monitor 50.

  Here, when receiving a signal for selecting a predetermined channel without television broadcast from the controller 60, the tuner 40 receives display data from the monitoring device 10, converts the display data into a signal for display on the monitor 50, and the monitor 50. Send to. The display data is image data photographed by the camera 20 and is the same as that displayed on the liquid crystal display 11 of the monitoring device 10.

  Thus, by displaying the image data of the monitoring device 10 on the television monitor 50 using the vacant channels of the television, the user can appropriately view the surveillance image on a large screen. Further, by using the controller 60, it is possible to easily switch between the TV video and the monitoring image.

  Although the monitoring device 10 and the tuner 40 are separate devices, the present invention is not limited to this, and a single device having both functions may be used.

  As mentioned above, although embodiment of this invention was described, this invention is not restricted to embodiment mentioned above. The effects described in the embodiments of the present invention are only the most preferable effects resulting from the present invention, and the effects of the present invention are limited to those described in the embodiments of the present invention. is not.

It is a block diagram which shows the system configuration | structure which concerns on an example of suitable embodiment of this invention. It is a figure which shows the external appearance of the monitoring apparatus 10 which concerns on an example of suitable embodiment of this invention. It is a figure which shows the memory | storage timing of the monitoring data based on an example of suitable embodiment of this invention. It is a figure which shows the monitoring data table which concerns on an example of suitable embodiment of this invention. It is a figure which shows the flow of the main process which concerns on an example of suitable embodiment of this invention. It is a figure which shows the flow of the display switching process which concerns on an example of suitable embodiment of this invention. It is a figure which shows the example of a screen display of the monitoring apparatus 10 which concerns on an example of suitable embodiment of this invention. It is a figure which shows the example of a screen display of the monitoring apparatus 10 which concerns on an example of suitable embodiment of this invention. It is a figure which shows the example of a screen display of the monitoring apparatus 10 which concerns on an example of suitable embodiment of this invention. It is a figure which shows the flow of the notification process which concerns on an example of suitable embodiment of this invention. It is a schematic diagram which shows the structure which combined the monitoring apparatus 10 which concerns on an example of suitable embodiment of this invention with the television.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Monitoring apparatus 11 Liquid crystal display 12 Sensor status display part 13 Display controller 14 Hotline button 15 Interphone controller 16 Speaker 17 Microphone 18 Handset 19 External connection terminal 20 Camera 30 Communication terminal 40 Tuner 50 Monitor 60 Controller 110 Reception part 120 Control part 130 Storage Unit 140 input unit 150 output unit 160 communication control unit

Claims (13)

A monitoring device that receives a plurality of monitoring data including moving image data captured by cameras installed at a plurality of locations, and displays the moving image data on a screen,
Means for storing a plurality of received monitoring data;
Means for selecting at least one of the monitoring data based on the evaluation of temporal changes of the plurality of monitoring data stored;
Means for reproducing and displaying the moving image data included in the selected monitoring data.   The monitoring system according to claim 1, wherein the reproduction display unit divides the screen and reproduces and displays the selected plurality of monitoring data simultaneously. The monitoring data further includes audio data collected by at least one microphone in the vicinity of the camera,
The monitoring apparatus according to claim 1, further comprising means for reproducing the audio data in synchronization with the moving image data to be reproduced and displayed. Means for transmitting and receiving data of a call between the camera and an interphone handset provided with the microphone;
Means for receiving a signal indicating the start of the call,
The monitoring apparatus according to claim 3, wherein a moving image captured by a camera provided in the interphone slave unit is displayed with the start of the call.   The monitoring apparatus according to claim 1, wherein the monitoring data further includes a signal from a sensor that senses an approach of a human body in the vicinity of the camera.   The monitoring device according to any one of claims 1 to 5, wherein the selecting means selects the monitoring data when the temporal change of the stored monitoring data is equal to or greater than a predetermined threshold. .   The monitoring device according to claim 6, wherein the storing unit deletes, from the storage, a portion of the monitoring data in which the time change does not satisfy a predetermined threshold value.   The monitoring apparatus according to claim 6 or 7, further comprising means for reproducing predetermined audio data stored in advance when the time change of the monitoring data becomes equal to or greater than a predetermined threshold.   The monitoring apparatus according to claim 1, further comprising means for transmitting the stored monitoring data to the communication terminal in response to a request from a communication terminal connected via a communication network.   The monitoring apparatus according to claim 9, further comprising means for transmitting data indicating that the time change has occurred with respect to the selected monitoring data to the communication terminal. Means for receiving content data to be presented to the user from the communication terminal;
The monitoring apparatus according to claim 9, further comprising a unit that displays the content instead of the monitoring data. Means for receiving a television broadcast and converting the signal into a plurality of channels;
Means for transmitting video data and audio data of the selected channel to a television monitor in response to receiving a selection input of the channel from a user,
12. The monitoring apparatus according to claim 1, wherein when a selection input of a predetermined channel not included in the television broadcast is received, the monitoring data is transmitted to the television monitor. . A method of receiving a plurality of monitoring data, each including moving image data captured by cameras installed at a plurality of locations, and displaying the moving image data on a screen,
Storing a plurality of received monitoring data;
Selecting at least one of the monitoring data based on the evaluation of temporal changes of the plurality of the monitoring data stored;
Replaying and displaying the moving image data included in the selected monitoring data.

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