KR101205427B1 - Router integrated network video recorder - Google Patents

Abstract

PURPOSE: A NVR(Network Video Recorder) integrated with a router is provided to enable a user to easily use an IP(Internet Protocol) camera by connecting to the router using a cable. CONSTITUTION: A first CPU(Central Processing Unit)(116) transmits an ARP(Address Resolution Protocol) and a DHCP(Dynamic Host Configuration Protocol) to an IP camera individually connected to a multi-channel port switch unit. The first CPU acquires the MAC(Multiple Access Computer) address of the corresponding IP camera, an IP address, and port information. The first CPU transmits the acquired MAC address, the IP address, and the port information to an NVR main board. A router(118) routes monitoring image data received through the multi-channel port switch unit to the NVR main board using the Ethernet. [Reference numerals] (114) N-port switch; (116) First CPU; (122) Second CPU; (140) Front board or rear board; (AA) Ethernet or PCle

Description

Router-integrated network video recorder {ROUTER INTEGRATED NETWORK VIDEO RECORDER}

The present invention relates to a router-integrated network video recorder, and more particularly, to a router-integrated network video recorder that does not require a separate network setting operation when connecting an IP camera.

In general, Network Video Recorder (hereinafter referred to as NVR) is capable of transmitting high-definition video such as Full HD and distance compared to Digital Video Recorder (DVR) using NTSC / PAL analog video. It is rapidly replacing existing DVRs with IP cameras due to its wide variety of applications and expandability without any limitations.

1 is a configuration diagram for explaining a connection of a general NVR.

Referring to FIG. 1, in order to connect several IP cameras 20 to the NVR 10, equipment such as a network switch or a router 30 is additionally required. The addition of such equipment not only increases costs, but also involves complex network setup, which requires some expertise for installation.

That is, in the case of configuring a network-based video surveillance system using the NVR 10 and the IP camera 20, a cost for a network device such as a network switch or a router 30 is basically added, and the network setting Some level of expertise is required for the installation and setup is required for each camera.

This inconvenience of installation is an important factor that slows down the spread of the network-based method, despite the excellent advantages such as high-resolution high-definition video transmission and excellent scalability compared to the analog method.

Therefore, the technical problem of the present invention is to solve such a conventional problem, an object of the present invention is to integrate the router function and the network that can be used immediately by simply connecting the IP camera cable without the cumbersome setting process It is to provide a router-integrated NVR to which configuration automation technology is applied.

In order to realize the above object of the present invention, a router integrated network video recorder (NVR) includes an IP camera router board connected in parallel with a plurality of IP cameras for capturing surveillance images, and the IP camera. The router board is disposed on the main body, and includes a network video recorder (NVR) main board connected to the IP camera router board through an Ethernet or PCle slot and storing surveillance image data provided from the IP camera router board. .

In one embodiment, the IP camera router board is connected to each of the IP cameras through a port, the multi-channel port switch for selectively receiving surveillance image data provided from the IP camera, and the multi-channel port switch Send ARP protocol or DHCP protocol to IP cameras connected to each of the connected ports to obtain MAC address, IP address and port information of the corresponding IP cameras, and transfer the obtained MAC address, IP address and port information to the NVR main board. And a router configured to route the surveillance image data received through the multi-channel port switch to the NVR main board through an Ethernet or PCle slot.

In one embodiment, the NVR main board is connected to the router via an Ethernet or PCle slot, an Ethernet controller for receiving image data provided from the router, and connected to the Ethernet controller, and transferred from the first CPU It may include a second CPU for requesting the image data to the IP camera connected to the corresponding port based on the MAC address, IP address and port information, and to control the storage, display, or transmission of the received image according to the request.

In one embodiment, the NVR main board may further include a storage controller for controlling storing the received image data in an external storage medium in response to the control of the second CPU.

In one embodiment, the NVR main board, H.264 decoder for decoding the image data received in response to the control of the second CPU, and connected to a display device to the image data decoded from the H.264 decoder It may include a high-definition multimedia interface (HDMI) controller provided to the display device.

According to such a router-integrated network video recorder, it is possible to connect and use an IP camera without complicated network setting by automating network setting.

1 is a configuration diagram for explaining a connection of a general NVR.
2 is a block diagram illustrating the connection of a router-integrated network video recorder according to an embodiment of the present invention.
FIG. 3 is a block diagram illustrating a router integrated network video recorder shown in FIG. 2.
FIG. 4 is a system diagram for describing an operation of a router integrated network video recorder shown in FIG. 3.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in more detail with reference to the accompanying drawings. The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It should be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Like reference numerals are used for like elements in describing each drawing. In the accompanying drawings, the dimensions of the structures are enlarged to illustrate the present invention in order to clarify the present invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component. Singular expressions include plural expressions unless the context clearly indicates otherwise.

In this application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a part or a combination thereof is described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Also, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

2 is a block diagram illustrating the connection of a router-integrated network video recorder according to an embodiment of the present invention.

Referring to FIG. 2, the router integrated network video recorder 100 is directly connected to a plurality of IP cameras 20. That is, the router integrated network video recorder 100 is integrated with a router function, and a network setting that enables a user to use the cable simply by connecting an IP camera without a cumbersome setting process when connecting the IP cameras 20. Automation technology is applied.

To do this, the router-integrated NVR uses MAC address, IP address through the Address Resolution Protocol (ARP) or Dynamic Host Configuration Protocol (DHCP) through the port to which the IP camera is connected. And obtain port information. Request image data from the IP camera based on the obtained MAC address, IP address and port information, receive the image data provided according to the response thereof, decode the image data to display the image, store the received image data, or receive the image data. The transmitted video data through an external network.

As such, according to the router-integrated network video recorder 100, the user can eliminate the trouble of installation because it is unnecessary to set up a separate network simply by connecting the cable to the IP camera.

FIG. 3 is a block diagram illustrating a router integrated network video recorder shown in FIG. 2.

Referring to FIG. 3, a router integrated network video recorder 100 according to an embodiment of the present invention includes an IP camera router board 110 and a network video recorder (NVR) main board 120.

The IP camera router board 110 includes a plurality of ports 112, a multi-channel port switch 114, a first CPU 116, and a router 118, and include one or more IP cameras for photographing surveillance images. 20). The IP camera 20 compresses the captured image and transmits the captured image to the IP camera router board 110 through a cable or a network, and the NVR device interworking with the IP camera 20 is provided by the IP camera 20. Receives and stores compressed video.

Each of the ports 112 is connected one-to-one to each of the IP cameras 20.

The multi-channel port switch 114 is connected to each of the IP cameras 20 through a port 112 to selectively receive surveillance image data provided from the IP camera 20.

When the NVR is installed, the first CPU 116 sends an ARP protocol or a DHCP protocol to the IP camera 20 connected to each of the ports connected to the multichannel port switch 114, so that the MAC addresses of the corresponding IP cameras 20, Obtain the IP address and port information, and transfer the obtained MAC address, IP address and port information to the NVR main board 120.

According to the present invention, a MAC address uniquely assigned to every device is used to automatically connect network settings including an IP address. For reference, a MAC address is also referred to as a physical address.

The MAC address consists of a six-byte value. Each byte is written in hexadecimal and separated by periods (':') or hyphens ('-'). The first 3 bytes are a manufacturer code, which is uniquely assigned to each manufacturer, and the remaining 3 bytes are a station ID, which the manufacturer specifies differently for each device. For example, if the MAC address is "00: 38: 06: 80: 10: F0", "00:38:06" is a manufacturer code and "80: 10: F0" is a station ID.

In general, the station ID is increased by +1 from the last byte. Therefore, for automatic network configuration, the station ID is taken from the least significant bit (LSB) of the last byte and converted to the ID value.

In this way, network setting is performed using the ID value obtained from the MAC address, and a separate label indicating the ID value and the MAC address may be attached to the main body case of the NVR. Accordingly, the user can easily see the value of the ID that is automatically set by looking at the label.

On the other hand, the IP address (IP address) is composed of an identifier (identifier) for identifying a specific network on the Internet and an identifier indicating a specific device (device) in the network, the network address portion ( Identifiers that represent devices are called network addresses and are often called local addresses or machine addresses. In addition, a particular network may comprise several subnetworks, in which case the local address has a subnet address. In addition, the IP address is 4 bytes, 32 bits total information, represented by four 8-bit numbers ranging from 0 to 255, and separated by periods. Each number is written in decimal, for example 192.168.0.1 to make it easier to read. Of these 32 bits, the higher bits are assigned to the network address portion and the remaining lower bits are assigned to the local address portion.

The router 118 routes the surveillance image data received through the multi-channel port switch 114 to the NVR main board 120 through an Ethernet or PCle slot. In this embodiment, a router is illustrated as a network layer device. Here, the network refers to a network of the IP band. Of course, routers may be replaced by network switches. The network switch is a layer 3 switch. The Layer 3 switch is a device that allows a network to be used by routing when an IP band exceeds 255 (based on C class) in a LAN (internal network) environment.

The NVR main board 120 is disposed in a main body in which the IP camera router board 110 is disposed, and is connected to the IP camera router board 110 through an Ethernet or PCle slot, and the IP camera router board 110. Stores surveillance video data provided from.

The NVR main board 120 includes an Ethernet controller 121, a second CPU 122, a storage controller 123, an H.264 decoder 124, and a high-definition multimedia interface (HDMI) controller 125. ).

The Ethernet controller 121 is connected to the router 128 through an Ethernet or PCle slot, and receives the image data provided from the router 118. In general, Ethernet controllers convert data into a data transfer format suitable for Ethernet. That is, the Ethernet controller provides an interface to the upper layer of the communication network to the CPU, but controls the upper layer of the OSI 7 layer such as TCP / IP or RTP, which is an Internet protocol.

The second CPU 122 is connected to the Ethernet controller 121 and an IP camera 20 connected to a corresponding port based on MAC address, IP address, and port information transmitted from the first CPU 116 when an NVR is installed. Requests video data and controls operations such as storing, displaying, and transmitting the received video according to the request.

The storage controller 123 controls to store the received image data in an external storage medium in response to the control of the second CPU 122.

The H.264 decoder 124 decodes the received image data in response to the control of the second CPU 122 and provides the decoded image data to the HDMI controller 125. H.264, the standard for digital video codecs, is a compression algorithm H264 recommendation number in H26L as defined by ITU-T (International Telecommunication Standardization Division), also called MPEG-4 AVC. H.264 is a new video compression standard that offers significantly greater compression than the previous method. The H.264 standard provides about twice as much compression and improved recognition quality than the previous MPEG-4. In addition, the H.264 standard can deliver DVD-quality high-quality video at speeds below 1 Mbps and can provide video playback over wireless, satellite, and ADSL Internet connections.

The HDMI controller 125 is connected to the display device 130 to provide the image data decoded from the H.264 decoder 124 to the display device 130.

The NVR main board 120 may further include a multipurpose input / output unit 126 connected to the front board or the rear board 140. The multipurpose input / output unit 126 may be connected to the front board or the rear board 140 through an RS-232 or RS-485 communication protocol. The multipurpose input / output unit 126 may include a universal asynchronous receiver transmitter (UART) or may be connected to a USB port.

FIG. 4 is a system diagram for describing an operation of a router integrated network video recorder shown in FIG. 3.

3 and 4, as the port 112 and the IP camera 20 are linked, the first CPU 116 may use an address resolution protocol (hereinafter, referred to as ARP) or dynamic address through the corresponding port. Acquire MAC address and IP address through Dynamic Host Configuration Protocol (hereinafter referred to as DHCP). At this time, port information (portinfo) is also acquired.

ARP is a protocol used to map an IP address to a physical network address on an IP network (mapping IP address to a MAC address). Here, the physical network address means a 48-bit network card address of Ethernet or Token Ring. For example, if the router-integrated NVR does not know the IP network's physical network address when it wants to send an IP packet to the IP camera, an ARP packet with the destination IP address of the IP camera and the broadcasting physical network address FFFFFFFFFFFF using the ARP protocol Send it over the network.

When the IP camera receives an ARP packet whose IP address is at the destination, it responds with its physical network address to the router-integrated NVR.

The IP address and the corresponding physical network address information collected in this way are stored in a table called memory of each IP camera, called ARP cache, and used again in the next packet transmission.

ARP does not know the other party's MAC address, so it carries only the IP and asks the other party if the IP is correct. However, to get to the IP layer, the MAC address must be known before it can pass through the data link layer. Therefore, the MAC address of 48-bit 1 is set to be recognized by all systems as its own address. In this way, the ARP protocol passes the data link layer to the MAC address above. The passed ARP protocol will ask each system for the correct IP. When it finds the right system, it returns to its original system with its MAC address. After this process, we can send data with MAC address corresponding to IP.

DHCP, meanwhile, is a protocol that allows network administrators to centrally manage and assign IP addresses on networks within an organization. In the TCP / IP protocol of the Internet, each computer must have a unique IP address to access the Internet. When computer users in an organization access the Internet, an IP address must be assigned to each computer. If you are not using DHCP, each computer must be manually entered with an IP address, and if the computer is moved to a different part of the network, a new IP address must be entered. DHCP allows network administrators to centrally manage and assign IP addresses, and to automatically send new IP addresses when computers connect to other places on the network.

The first CPU 116 transmits the MAC address, IP address, and port information obtained through the ARP protocol or the DHCP protocol through the router 118, the Ethernet or PCle slot, and the Ethernet controller 121. It passes to the CPU 122.

The second CPU 122 transfers the image data photographed through the corresponding port 112 based on the MAC address, IP address, and port information provided from the first CPU 116 to the Ethernet controller 121, the Ethernet, or the like. A request is made to the IP camera 20 via a PCle slot, the router 118, and the multichannel port switch 114.

Subsequently, the second CPU 122 receives image data through the port 112, the multichannel port switch 114, the router 118, the Ethernet or PCle slot, and the Ethernet controller 121. .

Subsequently, the second CPU 122 decodes the received image data and displays the image on the display device 130.

In addition, the second CPU 122 stores the received image data in a separate storage (not shown) through the storage controller 123 or transmits a network through the Ethernet controller 121.

Although described above with reference to the embodiments, those skilled in the art can be variously modified and changed within the scope of the invention without departing from the spirit and scope of the invention described in the claims below. I can understand.

As described above, the router-integrated network video recorder according to the present invention can be industrially used in the field of NVR technology and its application technology.

In addition, the NVR according to the present invention can be applied wherever a CCTV system is needed. Especially, where high quality video surveillance or long distance surveillance is required, the price / performance ratio is superior to the existing analog type.

In addition, it can be applied to replace existing analog equipment where image quality or performance needs improvement. A separate switch function is included for low cost installation.

10, 100: NVR 20: IP camera
30: Router 110: IP Camera Router Board
112: ports 114: multichannel port switch
116: first CPU 118: router
120: NVR main board 121: Ethernet controller
122: second CPU 123: storage controller
124: H.264 decoder 125: HDMI controller

Claims (5)

An IP camera router board connected in parallel with a plurality of IP cameras for capturing surveillance images; And
A network video recorder (NVR) main board disposed on a main body of which the IP camera router board is disposed and connected to the IP camera router board through an Ethernet or PCle slot to store surveillance image data provided from the IP camera router board. Including, the IP camera router board,
A multi-channel port switch connected to each of the IP cameras through a port to selectively receive surveillance image data provided from the IP camera;
MAC address of the corresponding IP cameras by sending an Address Resolution Protocol (ARP) or Dynamic Host Configuration Protocol (DHCP) to an IP camera connected to each of the ports connected to the multi-channel port switch. A first CPU obtaining IP address and port information and transferring the obtained MAC address, IP address and port information to the NVR main board; And
And a router configured to route surveillance video data received through the multi-channel port switch to the NVR main board through an Ethernet or PCle slot. delete According to claim 1, The NVR main board,
An Ethernet controller connected to the router through an Ethernet or PCle slot and receiving image data provided from the router;
Requesting image data to an IP camera connected to the port based on MAC address, IP address and port information transmitted from the first CPU, storing or displaying the received image according to the request; A router integrated network video recorder comprising a second CPU for controlling transmission. According to claim 3, The NVR main board,
And a storage controller configured to control storing the received image data in an external storage medium in response to the control of the second CPU. According to claim 3, The NVR main board,
An H.264 decoder for decoding the received image data in response to the control of the second CPU; And
And a high-definition multimedia interface (HDMI) controller connected to a display device and providing the decoded image data from the H.264 decoder to the display device.

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