JP2008193732A - Monitoring video transmission method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a monitoring video transmission method with which monitoring videos are selected for the side of a display terminal and can be distributed in an arbitrary packet format by enabling a method to efficiently use a camera-side transmission line and a display terminal-side transmission line when constructing a video supervisory system which accumulates the monitoring videos distributed from a monitor camera and transfers them again to the display terminal. <P>SOLUTION: All monitorings videos received form a camera-side IP network 22 are accumulated in a video accumulation unit 14 via an accumulation interface unit 13, and only the videos permitted to send are distributed to a terminal-side IP network 24 by a transmission control unit 16. Thus, video images to be sent to the terminal-side IP network 24 and videos not to be sent thereto can be set and a video output method corresponding to the bandwidth of the terminal-side IP network 24 can be achieved. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a monitoring video transmission method for transmitting a monitoring video shot by a monitoring camera.

  As shown in FIG. 11, this type of video storage device 114 was photographed by a plurality of monitoring cameras 111 via a broadcast Internet protocol (IP) network 112 for broadcasting all connected terminals simultaneously. The monitoring camera 111 includes a receiving unit that receives the monitoring video and a storage unit that stores the received monitoring video. When the same monitoring video captured by the monitoring camera 111 is simultaneously viewed on the plurality of display terminals 113, the monitoring camera 111. Is distributed by broadcasting, and simultaneously broadcast images are stored in the storage means.

In addition, as shown in FIG. 12, this type of video storage device (reception-side terminal device of the digital video distribution device) 115 is a multicast IP network 122 for broadcasting to a part of connected terminals. And receiving means for receiving the monitoring video captured by the plurality of monitoring cameras 121 and storage means for receiving the monitoring video received and viewed on the display terminal 123 from the monitoring camera 121 to the UDP (user datagram protocol) When a video is distributed using multicast, and the distributed video is received and viewed by the display terminal 123, the video being viewed is stored in the storage means (see, for example, Patent Document 1) ).
JP-A-10-31454

  However, since such a conventional surveillance video storage device uses a broadcast surveillance video storage method, all video from the surveillance camera is output to the display terminal side and is not desired to be sent to the display terminal side. There was a problem of sending out surveillance video. In addition, the video of the surveillance camera is not only transmitted to all display terminals, but also flows to the network of surveillance cameras, which unnecessarily increases the network load on both the camera and display terminals. was there.

  In addition, since the conventional surveillance video storage device uses the surveillance video storage method based on UDP multicast, the video from the surveillance camera does not cause unnecessary network load on the surveillance camera side. When the video storage device is provided on the side, only the monitoring video currently being viewed can be stored, and all of the video shot from the monitoring camera cannot be stored. Also, when UDP multicast is used, the monitoring video distribution destination is controlled using the IP router even when viewing on the display terminal side, so the monitoring video is switched for the protocol control processing of the UDP multicast in the IP router. There was a problem that a large delay occurred.

  Furthermore, the conventional surveillance video method using the UDP multicast has a problem in that even a video that is not desired to be shown to a specific display terminal or the user is transmitted due to the characteristics of the simultaneous broadcast communication of the UDP multicast.

  In the video surveillance system, the number of normal surveillance cameras is much larger than that of a display terminal for viewing surveillance video. In such a situation, the network on the monitoring camera side and the network on the display terminal side have an asymmetric network configuration. That is, the network on the monitoring camera side is large, and the network on the display terminal side is smaller than the network on the monitoring camera side. In such a situation, when all the monitoring video on the monitoring camera side is sent to the display terminal side, the network on the display terminal side is broken.

The present invention has been made to solve such a problem, and when storing surveillance video distributed from a surveillance camera through a network, it can accumulate all the video sent from the camera side, and a display terminal. It is an object of the present invention to provide a monitoring video transmission method capable of relaying and transmitting a monitoring video so that the network bandwidth can be used efficiently without overflowing the network bandwidth on the other side.

In addition, the present invention was made to solve such a problem, and distinguishes video that may or may not be sent to the display terminal side when relaying surveillance video, and packets according to the situation. It is an object of the present invention to provide a surveillance video transmission method capable of switching surveillance video at high speed while distributing by a construction method and reducing the network load on the camera side.

(1) The surveillance video transmission method of the present invention is a unicast network interface unit for connecting to a camera-side IP network to which a surveillance camera is connected and receiving surveillance images as packet data together with a unicast IP address by unicast. Whether to perform packet conversion processing on packet data input from the unicast network interface unit according to a packet conversion rule generated from conversion key information composed of at least a destination port number and the unicast IP address A conversion determination unit for determining, a conversion unit for converting packet data including the specified unicast IP address into multicast packet data only for the packet specified by the conversion determination unit, and conversion by the conversion unit The And determining whether transmission control unit sends the packet data to the display terminal, connected to the terminal side IP network, consists multicast network interface unit for delivering the packet data allowed the transmission by the transmission control unit Of the packet data of the monitoring image received by the camera-side IP network, only the packet that is permitted to be transmitted by the transmission control unit is converted into the multicast packet data according to the conversion rule, and is converted from the multicast network interface unit to the terminal side. It is distributed to the IP network. With this configuration, packet data of monitoring video received and input from the camera-side IP network is accumulated, and only the transmission-permitted packets are distributed to the terminal-side IP network. No return data is generated, and the camera side IP network can be used efficiently. In particular, video sent to the terminal-side network can be distinguished from video that is not sent, and a video output method corresponding to the bandwidth of the network on the display terminal side is possible, which makes it efficient without sending unnecessary monitoring video to the display terminal. In addition, it is possible to use the network bandwidth, and in addition, it is possible to use a method in which video that should not be transmitted to the display terminal side is not transmitted while being stored in the monitoring video storage device, and privacy protection can be considered.

(2) In the monitoring video transmission method of the present invention, the conversion determination unit has a conversion table of port numbers and multicast IP addresses, and the unicast packet having the port number registered in the conversion table is It is performed determination of converting the multicast packet by the conversion unit.

  For reference, the present invention is a communication terminal connected to the first network and the second network, and receives and inputs the monitoring video taken by the monitoring camera from the first network, and via the second network. When transmitting the display video to the display terminal and displaying the monitoring video on the display terminal, the communication terminal receives the monitoring video captured by the monitoring camera as packet data from the first network by UDP unicast, Judgment is made whether the received monitoring video can be transmitted, only the UDP unicast address permitted to be transmitted is converted into UDP multicast, the monitoring video is distributed to the display terminal via the second network, and the display At the terminal, all the monitoring videos received by UDP multicast are mapped to the desired monitoring video. It performs MAC filtering by multicast MAC address corresponding to the one-to-one Chikyasuto IP address, and displays selected switching only the desired surveillance video. By this method, the monitoring video storage device (communication terminal) selects the transmission destination of the monitoring video from the camera-side IP network by converting only the UDP unicast address permitted to be sent to the display terminal into UDP multicast. The display terminal receives all the packet data and performs MAC filtering with a multicast MAC (Media Access Control) address corresponding to the multicast IP address of the monitoring video to be viewed one-on-one so that only the desired monitoring video is displayed. It is possible to select and receive at high speed.

(3) In the surveillance video transmission method of the present invention, a terminal to which the display terminal is connected is configured by adding a path connecting the unicast network interface unit and the multicast network interface unit to the terminal-side bandwidth control unit. in a state where the side IP network is connected to the multicast network interface unit has the terminal-side band control unit, the terminal-side band control unit the maximum bandwidth of the terminal side IP network, and the maximum delivery speed video channels and each channel Has table information to store the bandwidth . With this configuration, in the state where the terminal-side IP network to which the display terminal is connected is connected to the multicast network interface unit, the maximum bandwidth and the maximum transmission video of the terminal-side IP network are transmitted to the terminal bandwidth control unit of the monitoring video storage device. It has table information that stores the number of channels (CH), and by using this table information, it is possible to transmit a monitoring video that takes into account the network bandwidth on the terminal side and the maximum number of processing channels (CH) on the terminal side. The network can be used efficiently.

(4) In the surveillance video transmission method of the present invention, in a state where a plurality of display terminals are connected to the multicast network interface unit, the multicast network interface unit has a network interface function to connect to the network. In addition , the conversion unit performs unicast packet conversion or multicast packet conversion in response to a request to reproduce the monitoring video stored in the video storage unit requested from the display terminal . With this configuration, when it is desired to transmit to all terminals on the display terminal side, to transmit to a part of the display terminal side, or to transmit to one terminal on the display terminal side, the bandwidth of the IP network on the display terminal side or terminal side The monitoring video can be sent according to the situation.

(5) In the surveillance video transmission method according to the present invention, the multicast network interface without any packet conversion processing in the conversion unit by the conversion determination unit among the packet data received from the unicast network interface unit. The packet data received from the multicast network interface unit is transmitted from the unicast network interface unit without being subjected to any packet conversion processing in the conversion unit by the conversion determination unit. .

  As a reference, in the surveillance video storage device of the present invention, a conversion table of port numbers and IP addresses for unicast reception of surveillance video from the surveillance camera is provided, and the conversion determination unit refers to the conversion table and registers it. Only the unicast packet having the port number assigned is converted into a multicast packet by the conversion unit. With this configuration, unnecessary return data from the surveillance camera does not occur in the camera-side IP network, and the camera-side IP network can be used efficiently. In addition, the camera-side IP network can perform UDP unicast. The terminal-side IP network can be used efficiently by accumulating the received monitoring video by the video accumulating unit and transmitting only the transmission permitted by the transmission control unit from the multicast network interface unit.

(6) In the surveillance video transmission method according to the present invention, the unicast network interface unit, the multicast network interface unit, and a route connecting the reception address registration unit are added and received from the unicast network interface unit. Of the received packet data and the packet data received from the multicast network interface unit, the received address registering unit discards all the packets other than those having the MAC address or IP address registered in the received address registering unit. Yes. With this configuration, it is possible to prevent damage caused by unauthorized access to the surveillance video storage device from the outside or unauthorized access to the surveillance camera and display terminal by discarding all packets from addresses not previously registered in the registration unit. It will be.

(7) In the monitoring video transmission method of the present invention, the unicast network interface unit, the multicast network interface unit, a reception address registration unit, and a path connecting the illegal data notification unit are added, and the unicast network interface unit is configured. Of packet data received from the interface unit and packet data received from the multicast network interface unit, a packet having a MAC address or IP address that is not registered in the reception address registration unit by the reception address registration unit. When the information is discarded, the invalid data notification unit notifies the designated IP address . With this configuration, when a packet from a MAC address or IP address that has not been registered in advance in the registration unit is received, the administrator of the notified IP address is notified by notifying the designated IP address, In other words, the system administrator can perform necessary processing for the unregistered MAC address or IP address.

(8) In the surveillance video transmission method of the present invention, in a state where a video cable of an analog surveillance camera having NTSC or PAL signal output is connected to the unicast network interface unit, the unicast network interface unit is In addition to the network interface function, it has a plurality of analog input units, converts the analog video input from analog video to digital video by the encoding unit, and based on the number assigned to each camera video input from the analog input unit Are converted into packets and sent to the conversion determination unit.

  For reference, in the surveillance video storage device of the present invention, various information necessary for the operation of the surveillance video storage device is set, and the MAC address indicating the access right from the first network or the second network or A setting unit for registering an IP address is provided, and the unicast network interface unit or the multicast network interface unit accesses the setting unit among packet data received from the first network or the second network. The packet data from the authorized MAC address or IP address is transmitted to the setting unit, and the setting information of the setting unit is transmitted to the MAC address or IP address via the first network or the second network. It has a configuration that. With this configuration, the monitoring video storage device can be set from an external personal computer (hereinafter abbreviated as a personal computer) connected to the network and having an IP address registered in the monitoring video storage device. In addition, the set value can be notified to the external network again. The operability of the apparatus is improved by remote control from a communication terminal (such as a personal computer) on the IP network.

(9) In the surveillance video transmission method of the present invention, the monitoring video transmission method includes a path connecting the unicast network interface unit and the multicast network interface unit to the setting unit, and accesses the setting unit among the received packet data. with the IP address of the packet data registered to send to the setting unit, and transmits the distribution information from the setting unit from the unicast network interface unit and the multicast network interface unit.

(10) In the surveillance video transmission method of the present invention, the unicast network interface unit has a network interface function to connect to the network by connecting to the camera side IP network to which the surveillance camera is connected, A monitoring video is received as packet data by TCP unicast with a unicast network interface function, and a monitoring video received by TCP unicast from the camera side IP network is received based on a conversion table set in the conversion determination unit. It is converted to UDP multicast and distributed to the terminal-side IP network, and monitoring video is sent to the storage interface unit by TCP unicast.

(11) In the surveillance video transmission method of the present invention, the multicast network interface unit, the transmission control unit, the video storage unit, and the video security unit are connected to each other, and the video of the surveillance camera is displayed on the display terminal side. The sending unicast network interface unit is provided with a network interface function to connect to the network, and sends a security function as set in the video security unit.

  For reference, in the surveillance video storage device of the present invention, a video security unit for setting a security function for the surveillance video stored in the video storage unit is provided, and the video security unit is provided with the predetermined security. The monitoring video is transmitted from the multicast network interface unit to the second network. With this configuration, it is possible to add a security function according to the video usage purpose of the video monitoring system administrator and the display terminal side to the transmission monitoring video, and it is possible to transmit video with digital watermark, encryption and scramble, It is possible to store and send surveillance video with security.

(12) In the surveillance video transmission method of the present invention, a unicast network interface for connecting to a camera side IP network to which a surveillance camera is connected and receiving surveillance images as packet data together with a unicast IP address by unicast. Whether to convert the packet data input from the step and the unicast network interface step in accordance with a packet conversion rule generated from conversion key information composed of at least a destination port number and the unicast IP address A conversion determination step for determining whether or not the packet data including the specified unicast IP address is converted into multicast packet data only for the packet specified by the conversion determination step. A transmission control step for determining whether or not to transmit the packet data converted by the conversion step to the display terminal side, and the packet data that is connected to the terminal-side IP network and permitted to be transmitted by the transmission control step Only the packet data of the monitoring image received by the camera-side IP network that is permitted to be transmitted by the transmission control step is converted into the multicast packet data according to the conversion rule. And is distributed to the terminal-side IP network by the multicast network interface step.

The present invention provides a video surveillance system that uses a UDP unicast that can reduce the network load on the camera side by providing a surveillance video storage device (relay device) that converts the surveillance video simultaneously with the storage of the surveillance video. The monitoring video can be distributed using UDP multicast suitable for distribution, the monitoring video from the camera side is once terminated by the monitoring video storage device, and all video is stored. The video to be sent to the IP network and the video not to be sent can be selected, or the delivery in the specified packet format can be set for the display terminal side, and at the same time the video output method according to the network bandwidth of the display terminal side is realized. It is possible to use the network bandwidth efficiently without sending unnecessary monitoring video to the display terminal. Effect in which it is possible to provide a monitoring image transmission method with.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
As shown in FIG. 1, the monitoring video storage apparatus according to the first embodiment of the present invention is a unicast network interface unit 11 for receiving monitoring video shot by a monitoring camera as packet data from a camera-side IP network 22. A conversion determination unit 12 that determines whether or not to convert the packet data received and input from the unicast network interface unit 11 according to a packet conversion rule, and a packet designated by the determination of the conversion determination unit 12 A conversion unit 15 that performs packet conversion for the packet, a storage interface unit 13 that converts packet data received and input from the unicast network interface unit 11 into an arbitrary format, and video data from the storage interface unit 13 are stored. Video storage unit 14 and A transmission control unit 16 for determining whether or not to transmit the packet data converted by the conversion unit 15 to the terminal-side IP network 24, and the packet data after the conversion processing permitted to be transmitted by the transmission control unit 16 And a multicast network interface unit 17 for multicast distribution from the terminal-side IP network 24.

  In FIG. 1, a unicast network interface unit 11 that receives a monitoring video by connecting to a camera-side IP network 22 to which a monitoring camera is connected determines whether or not to convert a unicast packet into a multicast packet. The unit 12 is connected to a storage interface unit 13 for storing received packets. The storage interface unit 13 is connected to the video storage unit 14 and stores the received monitoring video. The video storage unit 14 may be an HDD, a disk storage device, a tape, or the like. The conversion unit 15 performs a packet conversion process for performing packet conversion by the conversion determination unit 12, and transmits the packet instructed not to be converted by the conversion determination unit 12 to the transmission control unit 16 as it is. Further, the transmission control unit 16 determines whether or not the transmitted packet data is transmitted to the terminal-side IP network 24, and the multicast network interface unit 17 performs the terminal-side IP network 24 to which the display terminal is connected. The monitoring video is distributed by UDP multicast and connected to the transmission control unit 16.

Next, the operation of the monitoring video storage device of this embodiment will be described.
First, a surveillance video UDP unicast packet addressed to the surveillance video storage device is input to the unicast network interface unit 11 through the camera-side IP network 22 connected by the surveillance camera. The UDP unicast packet input and received in this way is transferred to the conversion determination unit 12 and the storage interface unit 13. Here, the storage interface unit 13 strips off the header portion of the UDP unicast packet data of the received monitoring video, extracts only the valid data portion of the packet, and stores the packet data in the video storage unit 14 as stream data of the monitoring video. . On the other hand, for the monitoring video UDP unicast packet data transferred to the conversion determining unit 12, the conversion determining unit 12 looks at the header information of the packet and determines whether to convert the packet or to transfer it as it is without conversion. To do. For the data transferred from the conversion determination unit 12 to the conversion unit 15, the conversion unit 15 converts the header portion of the packet and recalculates the frame check sequence (FCS) portion of the packet when the conversion is actually performed. Do. When packet conversion is not performed, the conversion unit 15 transfers the packet to the transmission control unit 16 as it is without converting any packet. The transmission control unit 16 has monitoring video information that the display terminal requests to view or band information of the terminal-side IP network 24, and controls transmission of necessary monitoring information to the terminal-side IP network 24. At the same time, it also has a function of searching for past monitoring video requested by the display terminal via the storage interface unit 13 and sending it to the requested terminal or network.

  As described above, the monitoring video storage device according to the first embodiment of the present invention includes the unicast network interface unit 11 for receiving the monitoring video shot by the monitoring camera as packet data from the camera-side IP network 22; A conversion determination unit 12 that determines whether or not to convert packet data received and input from the unicast network interface unit 11 according to a packet conversion rule, and a packet specified by the determination of the conversion determination unit 12 A conversion unit 15 that performs packet conversion, a storage interface unit 13 that converts packet data received and input from the unicast network interface unit 11 into an arbitrary format, and a video storage that stores video data from the storage interface unit 13 Part 14 and strange The transmission control unit 16 for determining whether or not to send the packet data converted by the unit 15 to the terminal-side IP network 24, and the packet data after the conversion processing permitted to be transmitted by the transmission control unit 16 Since the multicast network interface unit 17 for multicast distribution from the terminal-side IP network 24 is provided, monitoring video can be collected using UDP unicast that can reduce the network load on the camera side, and is suitable for distribution The monitoring video can be distributed using UDP multicast, and all the video is stored by terminating the monitoring video from the camera side once by the monitoring video storage device, and matches the network capability of the display terminal side. Distribution of surveillance video.

[Second Embodiment]
Since the surveillance video storage device 23 of the video surveillance system according to the second embodiment of the present invention shown in FIG. 2 has a configuration according to the first embodiment, FIG. Will be omitted.

  In the video monitoring method of the present embodiment, the monitoring video storage device 23 connected to the camera side IP network 22 and the terminal side IP network 24 receives and inputs the monitoring video shot by the monitoring camera 21 from the camera side IP network 22. In addition, when the monitoring video is transmitted to the display terminal 25 via the terminal-side IP network 24 and the monitoring video is displayed on the display terminal 25, the monitoring video storage device 23 uses the monitoring video captured by the monitoring camera 21 as packet data. Is received from the camera-side IP network 22 by UDP unicast, and it is determined whether or not the received monitoring video can be transmitted. Only the UDP unicast address permitted to be transmitted is converted into UDP multicast, and the monitoring video is displayed on the display terminal 25. Distributed via the terminal-side IP network 24 to the display terminal 25 Performs MAC filtering on all the monitoring videos received by UDP multicast with the multicast MAC address corresponding to the multicast IP address of the desired monitoring video one-to-one, and selects and displays only the desired monitoring video. Is.

  In the present embodiment, there are a camera side IP network 22 in which a plurality of surveillance cameras 21 are connected by a layer 2 switching hub (not shown), and a terminal side IP network 24 in which a plurality of display terminals 25 are connected by a layer 2 switching hub (not shown). Are connected to the unicast network interface unit 11 and the multicast network interface unit 17 of the monitoring video storage device 23, respectively.

  Next, the operation (video monitoring method) of the video monitoring system of this embodiment will be described. The surveillance video from the surveillance camera 21 is transmitted to the surveillance video storage device 23 using the UDP unicast in the camera-side IP network 22 and is received and input by the surveillance video storage device 23, as described above. At the same time as the monitoring video is accumulated in 14, the packet to be converted is converted into packet data of UDP multicast. The converted packet data is distributed to all display terminals 25 by the terminal-side IP network 24. Each display terminal 25 registers a multicast MAC address corresponding to the multicast IP address of the monitoring video to be viewed in the MAC register in a one-to-one manner. Each display terminal 25 captures only packet data that matches the MAC register, and selects and receives only the monitoring video registered in the MAC register at high speed.

  As described above, in the video monitoring method according to the second embodiment of the present invention, the monitoring video captured by the monitoring camera 21 is monitored by the monitoring video storage device 23 connected to the camera side IP network 22 and the terminal side IP network 24. Is received and input from the camera-side IP network 22 and transmitted to the display terminal 25 via the terminal-side IP network 24. When the monitor video is displayed on the display terminal 25, the monitor video storage device 23 Monitoring video captured by the camera 21 is received as packet data from the camera-side IP network 22 by UDP unicast, and whether or not the received monitoring video can be transmitted is determined, and only the UDP unicast address permitted to be transmitted is set to UDP multicast. The monitoring video is converted to the display terminal 25 via the terminal-side IP network 24. In the display terminal 25, all the monitoring videos received by the UDP multicast are subjected to MAC filtering by a multicast MAC address corresponding to the multicast IP address of the desired monitoring video one-to-one to obtain the desired monitoring video. Since only the monitoring video is switched and displayed, the monitoring video is temporarily terminated by the monitoring video storage device using UDP unicast which can reduce the network load on the camera side, and all the monitoring video is stored and displayed. Depending on the capabilities of the network on the terminal side, only the monitoring video requested by the display terminal can be distributed by UDP multicast suitable for distribution, and the display terminal can acquire monitoring packet data sent by UDP multicast And change the MAC register That is, it can be viewed by switching the surveillance video at high speed.

[Third Embodiment]
FIG. 3 shows a surveillance video storage apparatus according to the third embodiment of the present invention. The overall configuration is substantially the same as that of the first embodiment except for the terminal-side bandwidth control unit 38 and the table information unit 39, and therefore the same components are denoted by the same reference numerals and description thereof is omitted.

  The present embodiment is different from the first embodiment in that the multicast network interface unit 17 is further connected to the terminal-side IP network based on the maximum bandwidth of the terminal-side IP network 24, the maximum number of transmission video channels, and the information about the bandwidth of each channel. The difference is that a terminal-side band control unit 38 and a table information unit 39 that control not to transmit more than 24 bands are provided. According to this configuration, even when the bandwidth of the camera side IP network 22 and the bandwidth of the terminal side IP network 24 are not equal (for example, when the bandwidth of the camera side IP network 22 is large and the bandwidth of the terminal side IP network 24 is small). By introducing the monitoring video storage device of the present embodiment, it is possible to send the monitoring video to the display terminal without breaking down the terminal-side IP network 24, and at the same time the monitoring sent from the monitoring camera. Since all the video is stored in the video storage unit 14 through the storage interface unit 13, the video that could not be viewed due to the band relationship of the terminal-side IP network 24 can be confirmed later. An effect is also obtained.

In FIG. 3, the transmission control unit 16 determines whether to transmit the monitoring video input from the camera side IP network 22 to the terminal side IP network 24, and exchanges mutual information with the terminal side bandwidth control unit 38. Do. The table information unit 39 connected to the terminal-side bandwidth control unit 38 stores the total bandwidth of the terminal-side IP network 24. At the same time, the number of monitoring video channels currently transmitted to the terminal-side IP network 24 and each monitoring video Bit rate, priority information, and total bandwidth information being transferred. Further, the terminal-side bandwidth control unit 38 calculates the bandwidth of the terminal-side IP network 24 and the bandwidth transmitted by the multicast network interface unit 17 and performs control so as not to transmit more than the bandwidth of the terminal-side IP network 24. Do. Further, the terminal-side bandwidth control unit 38 determines which channel is to be monitored based on the priority information in the table information unit 39 when there is a transmission request exceeding the bandwidth of the terminal-side IP network 24. The result is notified to the transmission control unit 16. Further, the terminal-side band control unit 38 notifies the request rejection message packet through the transmission control unit 16 to the display terminal to which the monitoring video is not sent as a result.

[Fourth Embodiment]
FIG. 4 shows a surveillance video storage apparatus according to the fourth embodiment of the present invention. Since the overall configuration is substantially the same as that of the third embodiment, the same components are denoted by the same reference numerals and description thereof is omitted.

  This embodiment is further connected to the storage interface unit 13, the transmission control unit 16, and the multicast network interface unit 17, and is stored in the video storage unit 14 by the multicast network interface unit 17. When the monitoring video playback request is received from the terminal-side IP network 24, the storage interface unit 13 extracts the monitoring video stored in the video storage unit 14, and the conversion unit 15 converts the monitoring video to unicast packet conversion or The difference is that multicast packets are converted and transmitted from the multicast network interface unit 17 to the terminal-side IP network 24. According to this configuration, the monitoring video storage device always has to be connected to the monitoring video storage device from the camera side even if the monitoring video cannot be viewed at all on the display terminal side due to the relationship of the network bandwidth or the shortage of display terminals. Since all the monitoring videos that have been sent are stored, the past monitoring videos requested from the display terminal can be viewed later, effective use of the terminal-side IP network bandwidth, and saving of the display terminal device The effect that it is possible is also acquired.

  In FIG. 4, when there is a request to view a past monitoring video in the video storage unit 14 storing the existing monitoring video by the display terminal, the multicast network interface unit 17 that has received the request The meta information of the monitoring video with the error is transferred to the storage interface unit 13. The storage interface unit 13 that has received the meta information of the monitoring request monitoring video searches the video storage unit 14 for the location of the requested monitoring video. On the other hand, the transmission control unit 16 that has received a request for viewing a past monitoring video asks the terminal-side bandwidth control unit 38 whether or not transmission to the terminal-side IP network 24 is possible. The monitoring video is transferred from the video storage unit 14 to the multicast network interface unit 17 and unicast transmission or multicast transmission is performed to the terminal-side IP network 24.

[Fifth Embodiment]
FIG. 5 shows a surveillance video storage apparatus according to the fifth embodiment of the present invention. Since the overall configuration is substantially the same as that of the first embodiment except for the conversion table 53, the same components are denoted by the same reference numerals and description thereof is omitted.

  The present embodiment is different from the first embodiment in that a conversion table 53 of port numbers and IP addresses for unicast reception of surveillance video from a surveillance camera is provided, and the conversion determination unit 12 refers to the conversion table 53. However, the only difference is that the conversion unit 15 converts only unicast packets having registered port numbers into multicast packets. According to this configuration, it is possible to receive monitoring video using UDP unicast that can reduce the network load on the camera side, and to distribute monitoring video using UDP multicast suitable for distribution, and to UDP multicast. By using the packet header information in the conversion table 53, the conversion processing can be performed without using new identification information or header information for the monitoring video packet transmitted from the monitoring camera.

  In FIG. 5, the monitoring video input from the camera side IP network 22 is received by the unicast network interface unit 11. The conversion table 53 stores a port number and a correspondence table of the UDP multicast address to be converted and the port number. Here, the conversion determination unit 12 refers to the conversion table 53 when determining whether or not to perform the UDP multicast conversion process on the received UDP unicast packet as described above. That is, the conversion determination unit 12 searches the port number of the received UDP unicast IP address from the conversion table 53, and when the destination port number of the received packet is registered as a result of the search, the conversion determination unit 12 Obtain the multicast IP address and port number.

[Sixth Embodiment]
The overall configuration of the monitoring video storage apparatus of this embodiment is substantially the same as that of the fifth embodiment, and will be described with reference to FIG.

  This embodiment is different from the fifth embodiment in that packet conversion is performed by the conversion unit 15 on predetermined packet data received and input from the unicast network interface unit 11 according to the determination of the conversion determination unit 12. A packet conversion process is performed in the conversion unit 15 according to the determination of the conversion determination unit 12 with respect to predetermined packet data received and input from the multicast network interface unit 17 without being processed. The difference is that the unicast network interface unit 11 transmits the data as it is without performing the above. According to this method, the control packet to the monitoring video storage device, the control packet to the camera side, the control packet to the monitor side, and the packet on the normal network are converted into the original control and normal For those that have different meanings on the network, it is possible to store the monitoring video without disturbing normal network communication by sending it to the network as it is without performing packet conversion. As a result, control information other than the monitoring video can be multiplexed and communicated on the same IP network.

  In the present embodiment, among the packet data received from the unicast network interface unit 11, packets that are not subjected to packet conversion by the determination of the conversion determination unit 12, that is, the destination port number of the received packet is registered in the conversion table 53. When a packet that has not been received is received, the packet is transmitted from the multicast network interface unit 17 as it is, and conversely, the packet data received from the multicast network interface unit 17 is transmitted from the unicast network interface unit 11 as it is.

[Seventh Embodiment]
FIG. 6 shows a surveillance video storage apparatus according to the seventh embodiment of the present invention. Since the overall configuration is substantially the same as that of the fifth embodiment except for the reception address registration unit 63, the same components are denoted by the same reference numerals and description thereof is omitted.

  This embodiment is different from the first embodiment in that it further includes a reception address registration unit 63 for registering the MAC address or IP address of the packet data to be captured by the monitoring video storage device, and the unicast network interface unit 11 and The multicast network interface unit 17 is different in that it discards all packets other than those having the MAC address or IP address registered in the reception address registration unit 63. According to this configuration, by discarding all packets (illegal packets) that are not registered in the reception address registration unit 63, unauthorized access to the surveillance video storage device, unauthorized access to the surveillance camera, and unauthorized access to the display terminal from the outside It is also possible to prevent damage caused by the damage.

  In FIG. 6, the reception address registration unit 63 registers a MAC address or an IP address that may be taken into the monitoring video storage device, and packets received by the unicast network interface unit 11 and the multicast network interface unit 17 are Whether all packets are registered in the reception address registration unit 63 is determined, and only packet data from the registered MAC address or IP address is transferred to the next processing block. For packets that are not registered in the reception address registration unit 63, the unicast network interface unit 11 and the multicast network interface unit 17 discard the reception packet.

[Eighth Embodiment]
FIG. 7 shows a surveillance video storage apparatus according to the eighth embodiment of the present invention. Since the overall configuration is substantially the same as that of the seventh embodiment except for the illegal data notification unit 74, the same components are denoted by the same reference numerals and description thereof is omitted.

  In the present embodiment, in addition to the seventh embodiment, the unicast network interface unit 11 and the multicast network interface unit 17 discard a packet having a MAC address or an IP address that is not registered in the reception address registration unit 63. In this case, an illegal data notifying unit 74 is provided for notifying the MAC address or the IP address of information about the discarded packet. According to this configuration, when a packet from a MAC address or IP address that has not been registered in advance in the reception address registration unit 63 is received, the packet is notified by notifying the designated IP address. There is also an effect that an IP address manager, that is, a system manager, can perform necessary processing on a MAC address or IP address that is not registered.

  In FIG. 7, the unauthorized data notification unit 74 is connected to the reception address registration unit 63, the unicast network interface unit 11, and the multicast network interface unit 17. Further, when the illegal data notification unit 74 finds a packet that is not registered in the reception address registration unit 63 among the packets received from the unicast network interface unit 11 and the multicast network interface unit 17, Check the information about whether it came from a personal computer and what kind of packet it is. Detailed information on the discarded packet data for the address registered in the notification IP address register in the illegal data notification unit 74 Is transmitted via the unicast network interface unit 11 and the multicast network interface unit 17.

[Ninth Embodiment]
FIG. 8 shows a video surveillance system according to the ninth embodiment of the present invention. Since the surveillance video storage device 82 has a configuration according to the first embodiment, FIG. 1 is used and the same reference numerals are given to the same configuration and the description thereof is omitted.

  This embodiment is different from the first embodiment in that the unicast network interface unit 11 is further provided with a plurality of analog input units (not shown), and the plurality of analog input units have a standard color television standard broadcasting system. The unicast network interface unit 11 allows the plurality of video cables of the surveillance camera 81 that outputs a single NTSC (National Television System Committee) or PAL (Phase Alternation by Linecolor television) signal to be connected. An analog video input from the analog input unit is converted into a digital video by an encoding unit (not shown), and packet conversion is performed based on a number assigned to each camera video input from the plurality of analog input units. Thus, the point of sending to the conversion determination unit 12 is different. According to this configuration, even in a place where an existing monitoring camera 81 having an analog output, equipment of a monitoring system, and an analog monitoring camera are already installed, the monitoring video is accumulated from that point to the display terminal 25 side. With regard to transmission, it can be replaced with a digital network, and it is possible to obtain the effects that the surveillance system can be expanded and the surveillance video can be stored digitally.

In FIG. 8, a surveillance camera 81 outputs an NTSC output or an analog video such as PAL as a surveillance video output , and each surveillance camera 81 and surveillance video storage device 82 are connected point-to-point. The unicast network interface unit 11 of the monitoring video storage device 82 has an analog input terminal for inputting an analog video output from the monitoring camera 81, and the monitoring video input by each analog input terminal is encoded. By changing to digital video such as MPEG (moving picture experts group), Motion JPEG (joint photographic experts group), and high-quality video transmission system. Here, the high-quality video transmission system is a system in which an input / output signal of a studio material quality video recording / reproducing apparatus (registered trademark: DVCPRO) is adapted to an Internet protocol (IP) compliant format. The changed digital video is stored in the video storage unit 14 via the storage interface unit 13.

[Tenth embodiment]
FIG. 9 shows a surveillance video storage apparatus according to the tenth embodiment of the present invention. Since the overall configuration is substantially the same as that of the first embodiment except for the setting unit 93, the same reference numerals are given to the same components, and description thereof is omitted.

  This embodiment is different from the first embodiment in that various information necessary for the operation of the surveillance video storage device is set and the MAC address indicating the access right from the camera side IP network 22 or the terminal side IP network 24 Alternatively, a setting unit 93 for registering the IP address is provided, and the unicast network interface unit 11 or the multicast network interface unit 17 includes the setting unit 93 among the packet data received from the camera side IP network 22 or the terminal side IP network 24. Packet data from the MAC address or IP address having the access right to the setting unit 93 is sent to the setting unit 93, and the setting information of the setting unit 93 is sent to the MAC address via the camera side IP network 22 or the terminal side IP network Other points to be sent to the IP address is different. According to this configuration, the monitoring video storage device can be set from an external personal computer connected to the IP network and having an IP address registered in the monitoring video storage device of the present embodiment. In addition, since the set value can be notified again to the external network, the operability of the apparatus can be improved by remote control from a communication terminal (such as a personal computer) on the IP network.

In FIG. 9, the setting unit 93 is connected to the unicast network interface unit 11, the multicast network interface unit 17, and the conversion determination unit 12. The setting unit 93 stores various tables set and register setting controls the monitoring video storage device, or is used to register the MAC address and IP address. The setting unit 93 has an access register (not shown), and only the packet having the IP address registered in the access register is given access authority to the register inside the setting unit 93. The value set by the setting unit 93 is notified to the personal computer that has made the setting via the unicast network interface unit 11 and the multicast network interface unit 17 again.

[Eleventh embodiment]
The overall configuration of the monitoring video storage apparatus of this embodiment is substantially the same as that of the first embodiment, and will be described with reference to FIG.

  This is different from the first embodiment in that the unicast network interface unit 11 is provided with a unicast network interface function for receiving surveillance video as packet data by TCP (transmission control protocol) unicast, The monitoring video received from the network 22 by TCP unicast is converted into UDP multicast by the conversion determination unit 12 based on the conversion table 53 and distributed to the terminal-side IP network 24, and reliability is improved by TCP unicast. The difference is that the monitoring video thus transmitted is sent to the storage interface unit 13. According to this configuration, there is no retransmission control, but there is a TCP unicast reception function with a light processing load, a storage function in the monitoring video storage device, and a retransmission control function. It is possible to store the data in the network, and transmission to the display terminal side again by the UDP multicast with a light network load can be obtained, whereby the terminal side network can be used efficiently. In the present embodiment, the unicast network interface unit 11 has a function of receiving surveillance video from the surveillance camera by TCP unicast, and is connected to the conversion determination unit 12 and the storage interface unit 13.

[Twelfth embodiment]
FIG. 10 shows a surveillance video storage apparatus according to the twelfth embodiment of the present invention. This is different from the first embodiment in that a video security unit 108 for setting a security function for the monitoring video stored in the video storage unit 14 is provided, and the video security unit 108 is given predetermined security. The monitoring video is transmitted from the multicast network interface unit 17 to the terminal-side IP network 24. According to this configuration, it is possible to attach a security function to the monitoring video according to the video usage purpose of the video monitoring system administrator and the display terminal side, and transmission of video with digital watermark, encryption and scramble is possible As a result, it is possible to store and transmit surveillance video with high security.

  In FIG. 10, the video security unit 108 is connected to the multicast network interface unit 17, the transmission control unit 16, and the video storage unit 14. In addition, the video security unit 108 provides security such as digital watermarking, encryption, or scramble to the monitoring video transmitted to the terminal-side IP network 24. Here, the transmission control unit 16 determines which security function is assigned to each monitoring video. The security function is provided in real time by the video security unit 108 and is transmitted from the multicast network interface unit 17 to the terminal-side IP network 24.

The block diagram which shows the monitoring image | video storage device of the 1st, 11th embodiment of this invention The block diagram which shows the video surveillance system of the 2nd Embodiment of this invention The block diagram which shows the monitoring video storage device of the 3rd Embodiment of this invention The block diagram which shows the monitoring video storage device of the 4th Embodiment of this invention The block diagram which shows the monitoring image | video storage device of the 5th, 6th embodiment of this invention. The block diagram which shows the monitoring image | video storage device of the 7th Embodiment of this invention The block diagram which shows the monitoring video storage device of the 8th Embodiment of this invention The block diagram which shows the video surveillance system of the 9th Embodiment of this invention The block diagram which shows the monitoring image | video storage device of the 10th Embodiment of this invention Block diagram showing a surveillance video storage apparatus of a twelfth embodiment of the present invention Block diagram showing a conventional video surveillance system using broadcast Block diagram showing a conventional video surveillance system using UDP multicast

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Unicast network interface part 12 Conversion determination part 13 Accumulation interface part 14 Image | video accumulation | storage part 15 Conversion part 16 Transmission control part 17 Multicast network interface part 21, 81, 111, 121 Monitoring camera 22 Camera side IP network (1st network)
23, 82 Surveillance video storage device (communication terminal)
24 Terminal-side IP network (second network)
25, 113, 123 Display terminal 38 Terminal side bandwidth control unit 39 Table information unit 53 Conversion table 63 Received address registration unit 74 Unauthorized data notification unit 93 Setting unit 108 Video security unit 112 Broadcast IP network 114, 115 Video storage device 122 Multicast IP network

Claims (12)

Connected to the camera-side IP network to which the surveillance camera is connected, and receives a surveillance image as packet data together with a unicast IP address by unicast, and input from the unicast network interface unit A conversion determination unit that determines whether or not to perform packet conversion processing according to a packet conversion rule generated from conversion key information configured by at least a destination port number and the unicast IP address; and the conversion determination unit only for the specified packet, be transmitted a packet data including the designated said unicast IP address conversion section for converting the multicast packet data, the packet data converted by the conversion unit to the display terminal side And if determining transmission control unit or by connecting the terminal side IP network, consists multicast network interface unit for delivering the packet data allowed the transmission by the transmission control unit,
Of the packet data of the monitoring image received by the camera-side IP network, only the packet data permitted to be transmitted by the transmission control unit is converted into the multicast packet data according to the conversion rule, and is converted from the multicast network interface unit to the terminal-side IP. A surveillance video transmission method characterized by being distributed to a network . The conversion determination unit includes a conversion table of port numbers and multicast IP addresses, and performs a determination to convert a unicast packet having a port number registered in the conversion table into a multicast packet by the conversion unit. The monitoring video transmission method according to claim 1, wherein: A path connecting the unicast network interface unit and the multicast network interface unit and the terminal side bandwidth control unit is added,
In a state where the terminal-side IP network display terminal is connected is connected to the multicast network interface unit has the terminal-side band control unit, the terminal-side band control unit the maximum bandwidth of the terminal side IP network, and 2. The surveillance video transmission method according to claim 1, further comprising table information for storing a maximum number of video channels to be transmitted and a bandwidth of each channel . In a state where a plurality of display terminals are connected to the multicast network interface unit, the multicast network interface unit has a network interface function to connect to the network, and stores in a video storage unit requested by the display terminal. to reproduction request monitoring picture is, unicast packet conversion, or monitor the video transmission according to any one of claims 1 to 3, characterized in that sends perform multicast packets converted by the converting unit Method. Of the packet data received from the unicast network interface unit, the conversion determination unit transmits the packet data as it is without performing any packet conversion processing in the conversion unit, and conversely from the multicast network interface unit. 5. The received packet data is transmitted from the unicast network interface unit as it is without being subjected to any packet conversion processing in the conversion unit by the conversion determination unit . monitoring video transmission method according (1). A path connecting the unicast network interface unit and the multicast network interface unit and the reception address registration unit is added and configured,
Of the packet data received from the unicast network interface unit and the packet data received from the multicast network interface unit, the reception address registration unit is a MAC address or IP address registered in the reception address registration unit The monitoring video transmission method according to claim 1, wherein all packets other than the packet having the packet number are discarded . A path connecting the unicast network interface unit and the multicast network interface unit, the reception address registration unit, and the unauthorized data notification unit is configured,
Of the packet data received from the unicast network interface unit and the packet data received from the multicast network interface unit, the MAC address or IP address not registered in the reception address registration unit by the reception address registration unit when discarding packets with, the illegal data notifying unit monitoring the video transmission method according to any one of claims 1 to 4, characterized in that notifies the specified IP address. In a state where the video cable of the NTSC or analog surveillance camera having PAL signal output is connected to the unicast network interface unit, the unicast network interface unit has a plurality of analog input units in addition to the network interface function. The analog video input is converted from analog video to digital video by the encoding unit, packet-converted based on the number assigned to each camera video input from the analog input unit, and sent to the conversion determination unit The monitoring video transmission method according to claim 1, wherein: A path connecting the unicast network interface unit and the multicast network interface unit and a setting unit;
Among the received packet data, the packet data of an IP address registered for accessing the setting unit is sent to the setting unit, and distribution information from the setting unit is sent to the unicast network interface unit and the setting unit. 2. The surveillance video transmission method according to claim 1, wherein transmission is performed from a multicast network interface unit . And connected to the camera-side IP network surveillance camera is connected, the unicast network interface unit, in addition to performing the connection to the network comprises a network interface function, TCP Uni monitoring image comprises a unicast network interface function The monitoring video received as the packet data by the cast and received from the camera side IP network by the TCP unicast is converted into the UDP multicast based on the conversion table set in the conversion determination unit and distributed to the terminal side IP network. The monitoring video transmission method according to claim 1, wherein the monitoring video is transmitted to the storage interface unit by TCP unicast . The multicast network interface unit, the transmission control unit, and a path connecting the video storage unit and the video security unit,
The unicast network interface unit that transmits the video of the surveillance camera to the display terminal side is provided with a network interface function and connected to the network, and is also transmitted with the security function set in the video security unit. monitoring video transmission method according to claim 1, characterized in that. A unicast network interface step for connecting to a camera side IP network to which a surveillance camera is connected and receiving a surveillance image as packet data together with a unicast IP address by unicast, and input from the unicast network interface step A conversion determination step for determining whether or not to perform packet conversion processing in accordance with a packet conversion rule generated from conversion key information including at least a destination port number and the unicast IP address; and the conversion determination step. A conversion step for converting packet data including the specified unicast IP address into multicast packet data only for the specified packet, and conversion by the conversion step. A transmission control step for determining whether or not to transmit packet data to the display terminal side, and a multicast network interface step for connecting the terminal side IP network and distributing the packet data permitted to be transmitted by the transmission control step. ,
Only the packet data of the monitoring image received by the camera side IP network that is permitted to be transmitted by the transmission control step is converted into the multicast packet data according to the conversion rule, and the terminal side IP network is converted by the multicast network interface step. A method for transmitting surveillance video, comprising:

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