JP3483424B2 - Video surveillance system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image monitoring system for remotely monitoring an image input from a camera, and particularly to image data obtained by digitizing an image input from a camera and a specific event occurs. The present invention relates to a video surveillance system capable of digitizing a video at a time point and storing accumulated video data on each video surveillance terminal device in a plurality of surveillance centers via a transmission path.

[0002]

2. Description of the Related Art FIG. 19 is a block diagram showing the overall structure of a conventional video surveillance system of this type. In FIG. 19, 1 is a camera that captures a surveillance site, 2 is a video transmission processing unit that digitizes and outputs the video signal input from the camera 1, 20 is a video storage processing unit that stores video data corresponding to an event, and 3 is a video A transmission line for transmitting data, 50
Is a video display processing unit for receiving and displaying digital video data sent via the transmission path 3, and 6 is a video monitoring terminal device. This video monitoring system digitizes a video input from the camera 1, and when an event of a predetermined type occurs, a monitoring video of a point / time corresponding to the event is preset before and after the event occurs. The data is accumulated for only the time and displayed on the video surveillance terminal device 6 in the surveillance center installed at a remote place via the transmission path.

Next, the operation will be described. The image display processing unit 50 is usually located in the image monitoring center, and there is an observer there. By selecting and operating the camera 1 or the event at the point that the monitor wants to monitor, a video transmission request is issued to the corresponding video transmission processing unit 2, and the desired monitor video is transmitted through the transmission path 3
A desired image is displayed on the image monitoring terminal device 6.

[0004]

Since the conventional video monitoring system is constructed as described above, each video monitoring terminal device 6 monitors the video data input from the camera 1 or the stored video corresponding to the event. In this case, since the video data is transmitted through the transmission line 3 according to the request from each video monitoring terminal device 6, the load on the transmission line 3 increases in proportion to the increase in the number of the video monitoring terminal devices 6. There was a point. Further, since the accumulated video corresponding to the event is accumulated on the camera input side, when a display request is made from a plurality of video monitoring terminal devices 6, the accumulated video corresponding to each event flows via the transmission path 3. Therefore, the same data will flow through the transmission line 3 many times, and the load on the transmission line 3 will increase.

The present invention has been made in order to solve the above-mentioned problems, and it is possible to simultaneously transmit desired video data to a plurality of video monitoring terminal devices 6 in a monitoring center by transmitting desired video data only once. Alternatively, it is an object of the present invention to provide a video monitoring system that enables independent monitoring of the same video and reduces the load on the transmission path. In addition, a video monitoring system that enables the past video of the video data currently being monitored to be displayed on a plurality of video monitoring terminal devices in the monitoring center without imposing a load on the transmission path and reduces the load on the transmission path is provided. The purpose is to get. In addition, by incorporating a broadcast communication function in the video transmission processing unit, the desired video data can be transmitted to the transmission path only once, and the same video can be simultaneously or independently transmitted by a plurality of video monitoring terminal devices at a plurality of monitoring centers. It is an object of the present invention to provide a video surveillance system that enables monitoring and reduces the load on the transmission path.

[0006]

A first aspect of the present invention is a network 7 for connecting a transmission line management unit 4 and a video monitoring terminal device 6.
Network channel management table 411 for registering the channel and the identifier of the currently transmitted video data is provided in the video transmission management unit 5, and the video transmission processing unit 2 sets the identifier and channel of the video data currently being transmitted to the above video transmission. The management unit 5 is notified, the video transmission management unit 5 confirms the identifier and the channel using the network channel management table 411, and if the desired video data is delivered to the network 7, the same channel is used. The video data is configured to be transferred to each of the video monitoring terminal devices 6 at the same time.

In a second aspect of the present invention, a temporary storage device 68 for temporarily storing the received video data in the video relay processing unit 44 in the video transmission management unit 5, and the video monitoring terminal device for storing the temporarily stored video data. 6, and a temporary storage management table 66 that is referred to when starting the transfer of the stored video data from an arbitrary part when transmitting the data. It is what

A third aspect of the present invention is the video transmission processing section 2,
When a predetermined event occurs, the event accumulation management unit 88 that accumulates the video data input from the camera 1 related to the event within a time range set for each event type.
An event storage management table 881 for identifying event storage data corresponding to the event by an event identifier, and an event storage video transmission processing unit 90 for transmitting the event storage data to the requested video transmission management unit 5. In the video transmission management unit 5, the event management table 97 for identifying the video transmission processing unit having the event accumulated data related to the event by the identifier of the event and the received event accumulated data are temporarily stored. It is characterized in that a temporary storage video storage unit 96 and an event storage video transmission processing unit 98 for transmitting the temporarily stored event storage data to the video monitoring terminal device 6 are provided.

In a fourth aspect of the present invention, the video transmission management section 5 includes:
A temporary storage area management unit 111 that manages the area for temporarily storing video data according to the type of event corresponding to the video data, the reference number of the existing storage data, and the last reference time.
Is provided.

A fifth aspect of the present invention is the video transmission processing section 2,
It is characterized in that an event storage video transmission processing unit 90 for transmitting event storage data to each video transmission management unit at the same time is provided.

According to a sixth aspect of the present invention, the video transmission processing section 2 includes:
An event storage video transmission processing unit 90 for transmitting event storage data to each video transmission management unit at the same time is provided, and the video transmission management unit 5 manages the area for temporarily storing the video data by the type of event corresponding to the video data. And a temporary storage area management unit 111 for performing the reference number of the existing storage data and the last reference time.

According to a seventh aspect of the present invention, the video transmission management section 5 comprises:
Event storage video management table 13 that mutually shares the event identifier corresponding to the temporary storage data held by itself
41, and if the desired event accumulated data is included in the accumulated data managed by itself by referring to the event accumulated image management table 1341, the transmission-requested temporary accumulated data is transmitted to the image transmission management unit of another node. And an event storage video transmission processing unit 140 for performing the above.

An eighth aspect of the present invention is characterized in that the transmission path management section 4 is provided with an event storage video management table having an event identifier corresponding to the temporary storage data held by each video transmission management section 5. Is.

[0014]

DETAILED DESCRIPTION OF THE INVENTION

Embodiment 1. Embodiment 1 of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the overall configuration of the video surveillance system according to the first to seventh embodiments. Figure 1
In the figure, 1 is a camera for inputting a surveillance video, 2 is a video transmission processing unit for digitizing a video signal input from the camera 1 and transmitting it to a transmission line, and performing communication processing for various requests coming from the transmission line, 3 is a digital The above-mentioned transmission path for transmitting video data and various control information, 4 is a transmission path management unit for managing a channel for digital video transmission secured in the transmission path 3, and 5 is a digital video transmitted from the video transmission processing unit 2. A video transmission management unit that receives data and transfers it to the video monitoring terminal device, and notifies the video transmission processing unit 2 of a request from the video monitoring terminal device, and 6 is digital video data transferred from the video transmission management unit 5. Is a video monitoring terminal device for receiving and displaying video, and 7 is a monitoring center network for transmitting digital video data and various monitoring information.

FIG. 2 is a block diagram of the video transmission processing unit 2 in FIG. In FIG. 2, reference numeral 21 is a camera input section for digitizing an image input from the camera 1 and converting the signal so as to enable transmission, and 22 is video data digitized by the camera input section 21 to a channel secured in the transmission path 3. , 23 is a transmission path management section interface section for performing communication processing for various requests from the transmission path management section 4, and 24 is communication processing for various requests from the video transmission management section 5 (see FIG. 1). A video transmission management section interface section 25 is provided, and a communication section 25 is provided for exchanging various kinds of information with the transmission path 3.

FIG. 3 is a block diagram of the transmission path management unit 4 in FIG. In FIG. 3, reference numeral 31 is a transmission path channel management unit that manages a channel for transmitting video data on the transmission path 3, reference numeral 311 is a transmission path channel management table that registers an identifier of the channel and the video data that is currently being transmitted,
Reference numeral 32 denotes a video transmission processing interface unit that processes a channel reservation request from the video transmission processing unit 2 (see FIG. 2),
A communication unit 33 exchanges various information with the transmission path 3.

FIG. 4 is a block diagram of the video transmission management unit 5 in FIG. In FIG. 4, reference numeral 41 denotes a monitoring center network channel management unit 411 for managing digital video transmission channels on the monitoring center network 7.
Is a monitoring center network channel management table for registering the channel of the monitoring center network 7 and the identifier of the video data currently being transmitted, 42 is a video monitoring terminal interface unit for processing a video data request from the video monitoring terminal device 6, and 43 is The transmission path interface unit 431 for managing the video data currently delivered in the transmission path 3 and the channel thereof is a transmission path channel management table for registering the channel of the transmission path 3 and the identifier of the video data currently transmitted, Reference numeral 44 is a video relay processing unit that receives the video data delivered to the channel of the transmission path 3 and delivers it to the monitoring center network 7, 45 is a communication unit that exchanges various information with the monitoring center network 7,
A communication unit 6 exchanges various information with the transmission path 3.

Next, the process of transmitting the video data in accordance with the request from the video monitoring terminal device 6 in the first embodiment will be described with reference to the flowchart of FIG. The video monitoring terminal device 6 requests the video transmission management unit 5 for an input video from the camera 1 to be monitored by using an identifier determined in advance for each camera (step 500). Video transmission management unit 5
The monitoring center network channel management unit 41 therein checks using the monitoring center network channel management table 411 whether or not the image input from the camera having the requested identifier has already been sent to the monitoring center network 7 (step 501). . When the desired video data is delivered to the surveillance center network 7, the surveillance center that delivers the video data to the video surveillance terminal device 6 from the surveillance center network channel management unit 41 via the video surveillance terminal interface unit 42. The channel of the network 7 is notified (step 505). The video monitoring terminal device 6 notifies the notified monitoring center network 7
A desired image is received from the channel and displayed (step 506). When the desired video data has not been delivered to the monitoring center network 7, the video monitoring terminal interface unit 42 sends to the transmission path interface unit 43
It is confirmed using the transmission channel management table 431 whether the desired video data has already been delivered to the transmission channel (step 502).

When the desired video data is delivered to the transmission path 3, the video relay processing unit 44 is notified of the channel to which the video data is delivered, and the delivery of the video data to the monitoring center network 7 is requested. To do. The video relay processing unit 44 requests the surveillance center network channel management unit 41 to secure a channel of the surveillance center network 7. The monitoring center network channel management unit 41 refers to the monitoring center network channel management table 411 to secure a channel in the monitoring network 7,
The secured channel and the identifier of the video data to be delivered to the channel are registered in the monitoring center network channel management table 411, and the channel is notified to the video relay processing unit 44 and the video monitoring terminal interface unit 42 (step 503). The video relay processing unit 44 receives the video data from the channel of the transmission path 3 to which the video data is delivered, and delivers it to the channel secured in the monitoring center network 7. (Step 504). The video monitoring terminal interface unit 42 notifies the requested video monitoring terminal device 6 of the notified channel of the monitoring center network 7 (step 505). The video monitoring terminal device 6 receives and displays a desired video from the channel of the monitoring center network 7 notified from the video monitoring terminal interface unit 42 (step 506).

When the desired video data has not been delivered to the transmission path 3, the transmission path interface unit 43 requests the video transmission processing unit 2, which is the destination of the desired video data, to deliver the video data. The video transmission processing unit 2 notifies the transmission path management unit 4 of the identifier of the video data to be delivered, and requests the channel reservation of the transmission path 3 (step 50).
7). The transmission path management unit 4 secures a channel by referring to the transmission channel management table 311 in the transmission channel management unit 31, and registers the secured channel and the identifier of the video data to be delivered to the channel in the transmission channel management table 311. To do. After that, the video transmission processing unit interface unit 32 notifies the channel to the video transmission processing unit 2 of the request source. The video transmission processing unit 2 notifies the video transmission unit 22 and the video transmission management unit interface unit 24 of the channel notified by the transmission path management unit 4 by the transmission path management unit interface unit 23. The video sending unit 22 delivers the video data digitized by the camera input unit 21 to the notified channel (step 508). The video transmission management interface unit 24 notifies each video transmission management unit 5 of the notified channel and the identifier of the video data delivered by itself. In each video transmission management unit 5 , the channel notified by the transmission path interface unit 43 and the identifier of the video data delivered on that channel are registered in the transmission path channel management table 431.

The transmission path interface unit 43 of the requesting video transmission management unit 5 further notifies the video relay processing unit 44 of the notified channel. The video relay processing unit 44 secures a channel in the monitoring center network 7 (step 50
3) The video data is received from the notified transmission channel and is sent to the channel of the monitoring center network 7 (step 504). The video monitoring terminal interface unit 42 notifies the requesting video monitoring terminal device 6 of the channel secured in the monitoring center network 7 (step 5).
05). The video monitoring terminal device 6 receives and displays a desired video from the channel of the monitoring center network 7 notified from the video monitoring terminal interface unit 42 (step 506).

As described above, according to the first embodiment, the video transmission having the means for simultaneously transferring the video data received from the video transmission processing unit to the monitoring center having a plurality of video monitoring terminal devices to each video monitoring terminal device. Since the management unit is provided, the same video data is not transmitted to the transmission path using a plurality of channels, and the same video is monitored simultaneously or independently by a plurality of video monitoring terminal devices in the monitoring center. Therefore, there is an effect that the load on the transmission path can be reduced.

Embodiment 2. FIG. 6 is a block diagram of the video relay processing unit 44 (see FIG. 4) provided in the video transmission management unit 5 (see FIG. 1 or 4) in the second embodiment. Hereinafter, the second embodiment will be described with reference to FIGS. 1, 4 and 6.
The characteristic operation of will be described. The second embodiment is characterized in that the video transmission management unit 5 transfers any part of the temporarily stored data to the video monitoring terminal device 6 in response to a request from the video monitoring terminal device 6. First, the channel of the transmission line to which the video data requested by the video monitoring terminal device 6 (see FIG. 1) in the video relay processing unit 44 (see FIG. 4) is transferred is the transmission line interface unit 43.
When notified by the digital video data receiving unit 62 (see FIG. 6), the digital video data receiving unit 62 (see FIG. 6) receives the temporary storage processing unit 65 (see FIG. 6).
(See (2)) and the start of the temporary storage process. The temporary storage processing unit 65 secures an area capable of storing a predetermined number of frames on the temporary storage device 68 as a ring buffer, and generates a temporary storage management table 66 for managing the area.

FIG. 7 shows the configuration of the secured ring buffer. As shown in FIG. 7, each buffer has the start address of the previous buffer, the start address of the next buffer, and 1
Areas 71, 72, 7 for storing frame video data
Have 3.

When the video relay processing unit 44 starts the process of receiving the requested video data from the channel of the transmission path 3 and delivering the requested video data to the channel of the monitoring center network 7, the digital video data receiving section 62 operates as follows. Three
The received video data is transmitted to the digital video data transmitter 63 and the temporary storage processor 65. The digital video data transmission unit 63 delivers the received video data to the monitoring center network 7 using the channel secured by the means described in the first embodiment. Temporary storage processing unit 6
When 5 receives one frame of video data from the digital video data receiving unit 62, it acquires the head address of the next buffer from the buffer on the ring buffer in which the immediately preceding frame is stored, holds the acquired address, and stores the address. The video data is stored in the area for storing the frame of the buffer starting from. In addition, the time information of the frame and the start address of the buffer storing the frame are registered in the field of the earliest time in the temporary storage management table 66 created for each video data.

Next, a process of delivering an arbitrary portion of temporarily stored video data from the video sending processing unit 2 to the video monitoring terminal device 6 in response to a request from the video monitoring terminal device 6 will be described. The video monitoring terminal device 6 requests the video transmission management unit 5 about the identifier of the video data currently delivered in the monitoring center network 7 and how much time past data from the present time is required. In the video transmission management unit 5, the temporary storage data transmission processing unit 67 receives the request from the video monitoring terminal device 6 and refers to the temporary storage management table 66 of the video data of the requested identifier to display the video data at the requested time. The address of the temporary storage device 68 in which the frame is stored is acquired, the video data is read from the temporary storage device 68 from the address, and transferred to the request source video monitoring terminal device 6.

As described above, according to the second embodiment, the digital video data received at the monitoring center is temporarily stored, and an arbitrary portion of the stored data is transferred to the video monitoring terminal device. There is an effect that the past video of the video currently monitored can be displayed without imposing a load on the transmission path.

Embodiment 3. FIG. 8 is a block diagram of the video transmission processing unit 2 according to the third embodiment. The video transmission processing unit 2 is an event signal input unit 87 and a temporary memory unit 8 for endlessly storing a video input from the camera 1 and digitized by the camera input unit 81 for a predetermined time.
2. When the event specified by the event identifier is input from the event signal input unit 87, the video and the event that are stored in the temporary memory unit 82 in the time range preset in advance for each event type and before the occurrence of the event Corresponds to the event storage device 89 that stores the video input from the camera after the occurrence, the event storage management unit 88 that manages the event video stored in the event storage 89, and the event identifier requested by the video transmission management unit 5. An event storage video transmission processing unit 90 that delivers the event storage video to the request source video transmission management unit 5 is provided, and a video transmission unit 83, a transmission path management unit interface unit 84, a video transmission management unit interface unit 85, and a communication unit. It is equipped with 86.

The operation of the temporary memory unit 82 for endlessly storing the digitized image input from the camera for accumulating the past image when the event occurs in the image transmission processing unit 2 will be described. The temporary memory unit 82 includes a ring buffer 821 as shown in FIG. 8 and a temporary memory management table 822 for managing the time of video data on the buffer. The ring buffer 821 is composed of a plurality of buffers capable of accumulating one frame of video data, and each buffer stores the start address of the previous buffer, the start address of the next buffer, and one frame of video data. Temporary memory management table 8
The time information of the frame of the video data stored in the buffer in the ring buffer 821 and the start address of the buffer are registered in 22. Temporary memory unit 82
When the video data for one frame is input from the camera 1, the head address of the next buffer is acquired from the buffer on the ring buffer 821 that has accumulated the immediately preceding frame,
The acquired address is held, and the video data is stored in the area for storing the frame of the buffer starting from the address. At the same time, the temporary memory management table 822
The time information of the frame and the start address of the buffer storing the frame are registered in the table of the earliest time of.

Next, a process of accumulating the image held in the temporary memory unit 82 when a predetermined event occurs and the image data input from the camera 1 after the event occurs will be described. When an event occurs, it is input to the event signal input unit 87 as information having an event type and an identifier for identifying the event. The event signal input unit 87 is a video transmission management unit 5 and an event storage management unit 8 of each monitoring center.
8 is notified of the event identifier and the event type. Upon being notified of the event identifier and the event type, the video transmission management unit 5 of each monitoring center registers the event identifier, the event type, and the information of the video transmission processing unit of the notification source in the event storage management table 881. The event accumulation management unit 88 determines the accumulation start time of the image data before the event occurrence, the accumulation end time after the event occurrence, and the length of the accumulated image data according to the notified event type, and determines the accumulation start time and the event identifier. The storage end time, the length of the stored video data, and the event identifier are notified to the temporary memory unit 82, the event storage device 89 is registered with the event identifier, and the event storage completion flag is set to “not yet”.

The temporary memory unit 82 sets a flag corresponding to the event identifier in the corresponding field of the temporary memory management table 822 of the notified storage start time. The event storage device 89 secures an area corresponding to the length of the notified event accumulation data and waits for the accumulation end time. When the storage end time comes, the temporary memory unit is requested to store the stored video data corresponding to the event identifier, and the event storage management unit 88 is notified of the start address of the secured area. The temporary memory unit 82 refers to the temporary memory management table 822 from the requested event identifier, acquires the buffer start address of the accumulation start time, and acquires the video data on the temporary memory from the buffer up to the current time in the event storage unit 8
9 is stored in the secured area. Event accumulation management unit 8
8 is notified of the start address of the secured area from the event storage device 89, the event storage management table 88
The event accumulation completion flag in the field corresponding to the event identifier of 1 is completed, and the start address of the notified area is registered.

FIG. 9 is a block diagram of the video transmission management unit 5 in the third embodiment. This video transmission management unit 5
Information of an image transmission processing unit having an event identifier and accumulated data corresponding to the event, and an event management table 97 that holds the area when the accumulated data is temporarily stored in the image transmission management unit 5 The temporary storage video storage unit 96 that holds the event storage video and the event storage video transmission processing unit 98 that outputs the event storage video stored in the temporary storage video storage unit 96 to the video monitoring terminal device 6 are provided. Other configurations are the same as those in FIG.

Next, the operation of displaying the accumulated data corresponding to the event on the video monitoring terminal device 6 will be described. When the video monitoring terminal device requests the event accumulated video by the event identifier, the transmission path interface unit 94 refers to the event management table 97 to acquire the area in which the event accumulated video is temporarily stored. If the stored image is not temporarily stored, the corresponding field is empty. At this time, an area for holding the event accumulated video corresponding to the event identifier is secured in the temporary accumulated video storage unit 96. The size of the reserved area is preset according to the type of event corresponding to the event identifier. Thereafter, the event management table 97 (the contents of which are shown in FIG. 10) is referred to, the video transmission processing unit that stores the event storage video corresponding to the event identifier is identified, and the event storage video is sent to the video transmission processing unit. Request. In the video transmission processing unit, the event storage video transmission processing unit 90 delivers the event storage video of the requested event identifier to the video transmission management unit of the request source. The video transmission management unit stores the event accumulation video delivered from the video transmission processing unit in an area secured in the temporary storage video storage unit, registers the area in the event management table, and requests the event accumulation video transmission processing unit to request. Transfer to the original video surveillance terminal device. If the event transmission video is stored in the video transmission management unit, the area in which the event storage video corresponding to the requested event identifier is stored is acquired by referring to the event management table, and the event storage video transmission processing unit The event accumulated video is transferred to the video monitor terminal device that made the request.

As described above, according to the third embodiment, it is possible to reduce the load on the transmission path when displaying the event accumulation data corresponding to the event on the plurality of video monitoring terminal devices.

Fourth Embodiment FIG. 11 is a block diagram of the video transmission management unit 5 according to the fourth embodiment. This video transmission management unit 5 is the same as that described in the third embodiment, with a temporary storage storage area management unit 1171 for managing the area of the temporary storage video storage unit 117 added and held in the temporary storage video storage unit 117. Temporary event storage video management table 1111 for managing the reference number and last reference time of event storage video
It is equipped with. This temporary event accumulated video management table 1
The contents of 111 are shown in FIG.

Next, the operation of the temporary storage storage area management unit 111 that manages the area of the temporary storage video storage unit 117 in the fourth embodiment will be described with reference to the flowchart of FIG. When the event accumulated video which is not held in the temporary accumulated video storage unit 117 is received from the video transmission processing unit (step 200), the temporary accumulation storage area management unit 111 refers to the event management table 118 and refers to the temporary accumulation video storage unit. 1
Check whether there is a free area in 17 (step 2
01) If there is a free area, the received event accumulated video is accumulated in the area (step 202) and the contents of the event management table 118 and the temporary event accumulated video management table 1111 are changed. If there is no free area, the temporary event storage video management table 11
11, it is checked whether or not there is a stored image of an event having a lower priority than the received event stored video among the currently stored event stored videos (step 20).
3) If it exists, the received event accumulation video is accumulated in the area holding the event accumulation video, and the contents of the event management table 118 and the temporary event accumulation video management table 1111 are updated (step 20).
4). If there is no event storage video with low priority, the temporary event storage video management table 1111 is referred to, and the reference number of the event storage video currently held and the time last referenced are set for each monitoring center. It is checked whether or not there is one that does not reach the regulation (step 205), and if it exists, the received event accumulated video is accumulated in the area holding the event accumulated video, and the event management table 118 and temporary event accumulation are performed. The contents of the video management table 1111 are updated (step 204). If all the event-accumulated videos have reached the regulation, the received event-accumulated video is not held in the temporary-accumulated-video storage unit 117.

Next, the updating process of the temporary event storage video management table 1111 by the temporary storage storage area management unit 111 will be described. When the surveillance video terminal device requests the currently stored event storage video, the temporary storage storage area management unit 111 causes the temporary event storage video management table 1
"1" is added to the reference number of the field of the event identifier corresponding to the requested event accumulation video 111, and the final reference time is updated to the current time. When holding the event-stored video that is not currently held in the area where the existing event-stored video is held, the field corresponding to the existing event-stored video is deleted. When holding the event-stored video that is not currently held, a field of the event-stored video to be held is generated, “1” is registered in the reference count, and the current time is registered in the final reference time.

As described above, according to the fourth embodiment, the temporary storage area of the video transmission management unit is managed according to the type of event corresponding to the video data, the reference number of the existing storage data, and the final reference time. It is possible to efficiently manage the temporary storage area and preferentially leave the data predicted to have a large number of references in the area, thereby reducing the load on the transmission path.

Embodiment 5. In the fifth embodiment, when the event storage data is sent, a channel is used for sending it simultaneously to each monitoring center prepared on the transmission line.
FIG. 14 shows the operation of the event storage video transmission processing unit 90 of the video transmission processing unit 2 (see FIG. 8) used in the fifth embodiment.
This will be described with reference to the flowchart shown in. When the event-stored video transmission processing unit 90 receives a delivery request for the event-stored video (Step 300), it requests the transmission channel management unit to secure a channel (Step 301). If a free channel exists in the transmission path, the transmission path management unit notifies the event storage video transmission processing unit 90 of the secured channel. The event storage video transmission processing unit 90 notifies the video transmission management unit of each monitoring center of the notified channel, and then transmits the event storage data using the secured channel (step 302). When there is no free channel, normal event accumulation data transmission processing (processing of the third embodiment) is performed (step 303). The video transmission management unit of each monitoring center receives the event storage data from the channel notified by the event storage video transmission processing unit 90, and thereafter performs the processing described in the third embodiment.

As described above, according to the fifth embodiment, since the event accumulated data is sent to the video transmission management section of each monitoring center at the same time, the plurality of monitoring centers can send data without increasing the load on the transmission path. There is an effect that it is possible to display the same event accumulation data of.

Sixth Embodiment In the sixth embodiment, the event accumulation video is delivered from the video transmission processing unit to the video transmission management unit by the means described in the fifth embodiment, using each channel secured in the transmission path. Is done to. The video transmission management unit of each node manages the area for temporarily storing the event accumulated video by the means described in the fourth embodiment using the priority of the event accumulated video, the reference number, and the last reference time.

Next, the management of the temporary storage area of the video transmission management unit in the sixth embodiment will be described with reference to the flowcharts of FIGS. 15 and 16. When the contents of the temporary storage area are changed in the video transmission management unit (step 400), the changed contents are notified to each video transmission management unit (step 401). The video transmission management unit responds to the request for event accumulation data from the video monitoring terminal (step 500).
It is checked whether it exists in the temporary storage data managed by itself (step 501), and if it does not exist, it inquires of each video transmission management unit (step 502). If the corresponding event storage data exists in the video transmission management unit, the desired event storage data is transmitted to the requesting video transmission management unit (step 504). If it does not exist in the temporary storage areas of all the video transmission management units, the data transmission requesting unit having the desired event accumulated data is requested to transmit the data (step 503).

As described above, according to the sixth embodiment, the event accumulation data is simultaneously transmitted to the video transmission management section of each monitoring center, and each monitoring center manages the temporary storage area of the event accumulation data. Since it is configured, it is possible to display the event accumulation data at a plurality of monitoring centers without sending the same data to the transmission path many times.

Embodiment 7. FIG. 17 is a block diagram of the video transmission management unit 5 according to the seventh embodiment. The video transmission management unit 5 has a configuration of the video transmission management unit described in the fourth embodiment and a table for managing event storage video held by the video transmission management units of other nodes and an event identifier of the event storage video held by itself. Notification and the video transmission management unit interface unit 134 that processes a request for the event storage video from the video transmission management unit of another node, and the event storage that sends the requested event storage video to the video transmission management unit of another node The video transmission processing unit 140 is provided.

Referring to FIG. 17, the video transmission management unit 5 notifies the event identifier of the event storage video held by itself, and each video transmission management unit manages the event storage video held by another video transmission management unit. The processing will be described. When the event transmission video that is not held in the temporary storage video storage unit 138 is received from the event storage video transmission processing unit 140 in the video transmission management unit 5, the event storage video is temporarily stored by the process described in the fourth embodiment. The event identifier of the event accumulated video is notified to another video transmission management unit by the video transmission management unit interface unit 134 at the same time as being stored in the storage unit 138. When each video transmission management unit receives an event identifier from a specific video transmission management unit, an event storage video management table 1 for managing event storage video held by each video transmission management unit as shown in FIG.
The event identifier and the information of the video transmission management unit of the notification source are registered in 341.

Next, a process of transmitting the requested event-stored video to the video transmission management section of another node will be described. The video transmission management unit 5 refers to the event storage video management table 1341 for managing the event storage video held by each video transmission management unit when the video monitoring terminal device requests the delivery of the event storage video not held by itself. Then, it is confirmed whether or not there is a video transmission management unit that holds the requested event accumulated video. If the desired event storage video exists in the video transmission management unit of another node, the desired event storage video is requested to the video transmission management unit of the corresponding node using the event identifier. Upon receipt of the request, the video transmission management unit stores the event-stored video corresponding to the requested event identifier in the event storage area of the temporary-stored video storage unit 138 corresponding to the event identifier by a means similar to the means described in the third embodiment. The video is transmitted from the event storage video transmission processing unit 140 to the video transmission management unit of the requesting node. If not stored in all the video transmission management units, the desired event-accumulated video is requested to the video transmission / transmission processing unit by the event identifier by means equivalent to the means described in the third embodiment.

As described above, according to the seventh embodiment, since the temporary storage data held in each monitoring center are configured to be referred to each other, a plurality of identical events can be stored without increasing the load on the video transmission processing section. It is possible to respond to the request for the accumulated data, which has the effect of not affecting the image transmission process of the image transmission processing unit and the image data accumulation process corresponding to the event.

In the seventh embodiment, it has been described that each video transmission management unit manages the list of event accumulation videos held by all video transmission management units, but the events held by each video transmission management unit are described. The event storage video management table for managing the list of storage videos may be held in the transmission path management unit, and the video transmission management unit may make an inquiry to the transmission path management unit.

[0049]

As described above, according to the first aspect of the invention, since the video data from the desired camera is simultaneously delivered to each video monitoring terminal device, a plurality of video data can be sent without increasing the load on the transmission path. It is possible to obtain the effect of being able to monitor with the above monitoring center and a plurality of video monitoring terminal devices.

According to the second aspect of the present invention, the digital video data received by the video transmission management unit is temporarily stored and any portion of the stored data is transferred to the video monitoring terminal device. The effect that the past video of the video currently monitored can be displayed without imposing a load on

According to the third aspect of the invention, by providing the video transmission management unit with a temporary storage area for temporarily storing the video data corresponding to the event, it is possible to respond to the display requests of the event storage data from a plurality of video monitoring terminal devices. The effect of reducing the load on the transmission path is obtained.

According to the fourth aspect of the invention, the temporary storage area of the event storage data is managed based on the priority of the event, the reference number of the data and the last reference time, which are set for each video transmission management section. Management of temporary storage area,
The load of the transmission path can be reduced by preferentially leaving the data predicted to have a large number of references in the area.

According to the fifth aspect of the invention, since the event accumulation data is delivered to each video transmission management section at the same time, the same event accumulation data from a plurality of monitoring centers can be stored without increasing the load on the transmission path. It is possible to obtain the effect of enabling the display of.

According to the sixth aspect of the present invention, the event accumulation data is simultaneously delivered to each video transmission management section, and each video transmission management section manages the temporary accumulation area of the event accumulation data. The effect that the event accumulated data can be displayed at a plurality of monitoring centers can be obtained without repeatedly delivering the data to the transmission path.

According to the seventh invention, since the identifiers of the temporarily stored data held by the respective video transmission management units can be referred to each other, a plurality of identical events can be stored without increasing the load on the video transmission processing unit. It is possible to respond to the request for the accumulated data, which has the effect of not affecting the image transmitting process of the image transmitting processing unit and the image data storing process corresponding to the event.

According to the eighth invention, since the identifier of the temporarily stored data held by the video transmission management unit can be referred to, the plurality of same event stored data can be stored without increasing the load on the video transmission processing unit. It is possible to respond to the request, and as a result, it is possible to obtain the effect of not affecting the video transmission processing of the video transmission processing unit and the video data storage processing corresponding to the event.

[Brief description of drawings]

FIG. 1 is a block diagram showing an overall configuration of a video surveillance system according to first to seventh embodiments of the present invention.

FIG. 2 is a block diagram of a video transmission processing unit according to the first embodiment.

FIG. 3 is a block diagram of a transmission path management unit according to the first embodiment.

FIG. 4 is a block diagram of a video transmission management unit according to the first embodiment.

FIG. 5 is a flowchart showing video data transmission processing according to the first embodiment.

FIG. 6 is a block diagram of a video relay device according to a second embodiment.

FIG. 7 is a configuration diagram of a ring buffer according to the second embodiment.

FIG. 8 is a block diagram of a video transmission processing unit according to the third embodiment.

FIG. 9 is a block diagram of a video transmission management unit in the third embodiment.

10 is a configuration diagram of an event management table in FIG.

FIG. 11 is a block diagram of a video transmission management unit according to the fourth embodiment.

12 is a configuration diagram of a temporary event storage image management table in FIG.

FIG. 13 is a flowchart showing management processing of a temporary storage area according to the fourth embodiment.

FIG. 14 is a flowchart showing a delivery process of event accumulated data according to the fifth embodiment.

FIG. 15 is a flowchart showing management processing of a temporary storage area according to the sixth embodiment.

FIG. 16 is a flowchart showing a transmission process of event accumulated data according to the sixth embodiment.

FIG. 17 is a block diagram of a video transmission management unit in the seventh embodiment.

FIG. 18 is a configuration diagram of an event storage video management table in FIG. 17.

FIG. 19 is a block diagram showing an overall configuration of a conventional video surveillance system.

[Explanation of symbols]

1 camera, 2 video transmission processing unit, 3 transmission path, 4 transmission path management unit, 5 video transmission management unit, 6 video monitoring terminal device, 7 network, 20 video storage processing unit, 21
81 camera input unit, 22, 83 video transmission unit, 23,
84 transmission line management unit interface unit, 24, 85,
134 video transmission management unit interface unit, 25, 3
3,45,46,61,64,86,93,99,11
3, 116, 133, 137 communication unit, 32 video transmission processing unit interface unit, 41, 91, 111, 13
1 monitoring center network channel management unit, 42,
92, 112, 132 video monitoring terminal interface section, 43, 94, 115, 136 transmission line interface section, 44, 95, 114, 135 video relay processing section, 50 video display processing section, 62 digital video data receiving section, 63 digital Video data transmitter, 65
Temporary accumulation processing unit, 66 Temporary accumulation management table, 67
Temporary accumulated data transmission processing unit, 68, 961 temporary storage device, 71, 72, 73 ring buffer area, 82
Temporary memory unit, 87 event signal input unit, 88 event accumulation management unit, 89 event storage device, 90, 9
8, 119, 140 Event accumulation video transmission processing unit, 9
6, 117, 138 Temporary storage image storage unit, 97, 11
8, 139 event management table, 141 temporary storage storage area management unit, 411 monitoring center network channel management table, 431 transmission channel management table, 681, 821 ring buffer, 822 temporary memory management table, 881 event storage management table, 1111, 1411 Temporary event accumulated video management table, 1171, 1381 Temporary storage device.

Claims (8)

(57) [Claims] 1. A video transmission processing unit that digitizes a video signal input from a camera and sends it to a transmission line, and performs communication processing for various transmission requests transmitted from the transmission line, and a video transmission processing unit secured in the transmission line. A transmission path management unit that manages the digital video transmission channel, and receives the digital video data transmitted from the video transmission processing unit through the transmission path, and transfers the digital video data to a plurality of video monitoring terminal devices. A video transmission management unit that notifies the video transmission processing unit of a request from the video terminal device, and the video monitoring terminal device that receives the digital video data transferred from the video transmission management unit and displays the video. In the provided video monitoring system, identification of the network channel connecting the transmission path management unit and the video monitoring terminal device and the currently transmitted video data. A network channel management table for registering a child is provided in the video transmission management unit, the video transmission processing unit notifies the video transmission management unit of the identifier and channel of the video data currently being transmitted, and the video transmission management unit The identifier and the channel are confirmed using the network channel management table, and if the desired video data is delivered to the network, the desired video data is simultaneously transferred to the respective video monitoring terminal devices on the same channel. A video surveillance system characterized by the above. 2. The video transmission management unit includes a temporary storage device for temporarily storing the received video data, a temporary storage data transmission processing unit for transmitting the temporarily stored video data to the video monitoring terminal device, and the transmission. 2. The video monitoring system according to claim 1, further comprising a temporary storage management table that is referred to in order to start the transfer of the stored video data from an arbitrary portion when performing the process. 3. An event storage management unit for storing, in the video transmission processing unit, video data input from a camera associated with the event when a predetermined event occurs within a time range set for each event type. An event storage management table for identifying event storage data corresponding to the event by an event identifier, and an event storage video transmission processing unit for transmitting the event storage data to the requested video transmission management unit are provided. In the video transmission management unit, an event management table for identifying the video transmission processing unit having the event accumulated data related to the event by the event identifier, and the temporarily stored image storage unit for temporarily storing the received event accumulated data. , Event storage video transmission that transmits the temporarily stored event storage data to the video monitoring terminal device The video monitoring system according to claim 1, further comprising a processing unit. 4. The video transmission management unit includes a temporary storage storage area management unit that manages an area for temporarily storing video data according to the type of event corresponding to the video data, the reference number of existing storage data, and the last reference time. The image monitoring system according to claim 1, wherein the image monitoring system is provided. 5. The image storage processing unit according to claim 1, wherein the video transmission processing unit is provided with an event storage image transmission processing unit that simultaneously transmits event storage data to each video transmission management unit. Video surveillance system. 6. The video transmission processing unit is provided with an event storage video transmission processing unit for simultaneously transmitting the event storage data to each video transmission management unit, and the video transmission management unit is provided with an area for temporarily storing the video data. The video surveillance according to claim 1 or 3, further comprising: a temporary storage area management unit for performing management according to the type of event corresponding to the video data, the reference number of the existing storage data, and the last reference time. system. 7. The event transmission video management table for mutually sharing the event identifier corresponding to the temporary storage data held by the video transmission management unit, and the desired event storage by referring to the event storage video management table. If the data is in the stored data managed by itself, an event storage video transmission processing unit for transmitting the temporary storage data requested to be transmitted to the video transmission management unit of another node is provided. The video surveillance system according to item 1, 3, or 6. 8. The event storage video management table having an event identifier corresponding to temporary storage data held by each video transmission management unit is provided in the transmission path management unit. The video surveillance system according to item 3.