KR20190094787A - NVR(Network Video Recorder) recording failover - Google Patents

Abstract

The present invention relates to a video recorder comprising: a communication unit of exchanging camera registration information with other video recorders; a processing unit of selecting a recordable camera among cameras included in camera registration information of other video recorders and adding the selected camera to a backup list; and a storage unit of storing the camera registration information and the backup list. The processing unit, if the video recorder that was recording a video of the camera included in the backup list fails to record the video of the camera, records the video of the camera. The camera registration information is information with respect to the camera that was recording the video. If some of the plurality of video recorders have a malfunction, are upgraded or are lack of storage spaces for recording the video, and it is difficult to record the video of the camera that was recording the video, other video recorders may record the recording data being recorded in the video recorder to maintain the recording data.

Description

Network video recorder recording loss prevention {NVR (Network Video Recorder) recording failover}

The present invention relates to a video recording apparatus, and more particularly, to a video recording apparatus for holding video recording data of a video recording apparatus when some of the plurality of video recording apparatuses are difficult to record.

A network video recorder (NVR) refers to a video recording (recording) device for performing functions including video recording, monitoring, event management, or playback of a camera or video server installed on a network. In addition, a digital video recorder (DVR), which receives and compresses digital images through an IP camera in an IP network, is specifically called an MD-NVR.

The DVR is a device capable of recording an image on a hard disk based digital storage device, not a video tape, and may be used as a personal video recorder (PVR). Refers to a device capable of recording a television broadcast on a digital recording device (DVR). In addition, the DVR or PVR may be classified into a stand-alone type set-top box capable of storing an image on a disk or playing a stored image, and a set-top box of a PC type using a PC.

NVR and DVR devices inform the user through an alarm when the HDD is full. After checking the alarm, the user should change the HDD so that the recorded data can be saved normally. However, there is a problem that the transmitted video until the user replaces the HDD in the HDD Full state will be lost. In addition, when upgrading the firmware or the NVR is broken, there is a problem that can not store the video of the camera connected to the NVR.

Korean Registered Patent No.1336636

An object of the present invention is to provide an image recording apparatus for holding image recording data of a video recording apparatus when some of the plurality of video recording apparatuses are difficult to record.

The objects of the present invention are not limited to the above-mentioned objects, and other objects that are not mentioned will be clearly understood by those skilled in the art from the following description.

In order to solve the above problems, the video recording apparatus according to an embodiment of the present invention communication unit for exchanging camera registration information with another video recording device; A processor configured to select a recordable camera among cameras included in camera registration information of the other video recording apparatus, and add the selected camera to a backup list; And a storage unit for storing the camera registration information and the backup list, wherein the processing unit is configured to perform recording of an image of the camera included in the backup list when the image recording apparatus fails to record the image of the camera. The video is recorded, and the camera registration information is information on a camera recording a current video.

The processor may calculate an acceptable performance limit using at least one of a marginal recording bandwidth, a marginal reception bandwidth, or a CPU idle threshold, and select a recordable camera within the acceptable performance limit. have.

Also, the communication unit may periodically exchange the camera registration information with another video recording apparatus or when there is a change in the video recording network environment.

The backup list may not be duplicated with backup lists of other video recording apparatuses.

The processor may stop recording the video of the camera when the video recording apparatus for recording the video of the camera included in the backup list is changed to another video recording apparatus. The communicator may transmit a previously recorded video of the camera to another video recording device which is changed to a video recording device for recording the video of the camera.

The communication unit may transmit current status information to another video recording apparatus when it is difficult to record a video of a camera currently recording a video due to a failure, upgrade or insufficient storage space for recording video. can do.

Other specific details of the invention are included in the detailed description and drawings.

According to embodiments of the present invention has at least the following effects.

According to the present invention, if some of the plurality of video recording devices have a failure, upgrade or insufficient storage space for recording the video, it is difficult to record the video of the camera currently recording the video. Another video recording device may record the recording data that was being recorded by the video recording device to maintain the recording data.

The effects according to the present invention are not limited by the contents exemplified above, and more various effects are included in the present specification.

1 is a block diagram of an image recording apparatus according to an embodiment of the present invention.
2 is a diagram illustrating a failover method in a conventional video recording apparatus.
3 shows an image recording network formed by another image recording apparatus according to an embodiment of the present invention.
4 and 5 are diagrams for explaining a process in which a video recording apparatus according to an embodiment of the present invention maintains the recording data of another video recording apparatus.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, and only the embodiments make the disclosure of the present invention complete, and the general knowledge in the art to which the present invention belongs. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used in a sense that can be commonly understood by those skilled in the art. In addition, the terms defined in the commonly used dictionaries are not ideally or excessively interpreted unless they are specifically defined clearly.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, "comprises" and / or "comprising" does not exclude the presence or addition of one or more other components in addition to the mentioned components.

1 is a block diagram of an image recording apparatus according to an embodiment of the present invention.

The video recording apparatus 110 according to an embodiment of the present invention includes a communication unit 111, a processing unit 112, and a storage unit 113. The video recording apparatus 110 according to an embodiment of the present invention forms a video recording network with other video recording apparatuses 120. It is formed of a plurality of cameras and a plurality of video recording apparatuses, and the cameras may be connected through a network instead of directly connected to the video recording apparatuses.

In the case of a conventional network video recorder (NVR), as in FIG. 2, the standby NVR 210 prepares for a failure by using a method of recording instead of the failed NVR 220 through an NVR failover. However, when two or more NVRs are broken, it is difficult to respond, and the Standby NVR 210 does not normally record, and thus there is an NVR that does not operate normally.

While maintaining the recording data, failover is distributedly performed so that the video recording apparatuses of the video recording network can operate efficiently. In case the specific video recording device cannot record the video, the video recording device can set in advance which video recording device will record the video from the camera that recorded the video. If the video recording device cannot record the video, the other video recording devices share the cameras recording the video. A plurality of video recording apparatuses may be used in both networks for recording images of a plurality of cameras. Hereinafter, a representative NVR will be described as an example.

First, the camera registration information is exchanged with another video recording device 120 through the communication unit 111. Here, the camera registration information is information about a camera recording a current image, and as shown in FIG. 3, the video recording device 310 includes information of cameras 320 currently recording and recording an image. In order to determine which camera video is recorded by each video recording device, and to prepare for a case in which a video recording device cannot record video, the camera registration information of each video recording device 120 from each other video recording device 120 is used. Receives, and transmits its camera registration information to another video recording device (120).

The processor 112 selects a recordable camera among the cameras included in the camera registration information of the other video recording apparatus, and adds the selected camera to the backup list. The processor 112 selects cameras to maintain the recording, and backs up the selected camera when the video recording apparatus is difficult to record among the cameras included in the camera registration information received from the other video recording apparatus 120. Add to list The number of cameras selected as the recordable camera may vary depending on the situation of the video recording apparatus 110.

When camera selection is completed, as shown in FIG. 4, a corresponding camera may be added to each backup list. NVR 1 selects one camera 321 and adds it to the backup list 410 with respect to the cameras 320 currently registered and recording the video. Two cameras 322 and 323 may be selected and added to the backup list 420, and NVR 3 may select one camera 324 and add it to the backup list 430.

In selecting the recordable camera, the processing unit 112 calculates an acceptable performance limit using one or more of an available recording bandwidth, an available receiving bandwidth, or a CPU idle threshold. You can select a recordable camera within the performance limits. The performance of each video recording device is limited, so in order to record the video of some of the cameras recorded by the video recording device in the situation where other video recording device cannot record, the acceptable performance limit is calculated first. You need to select a recordable camera within.

The acceptable performance limit can be calculated using one or more of the margin recording band, the margin reception band, or the CPU idle threshold.

The margin recording band and the margin reception band can be calculated as follows.

Free Recording Bandwiss = Maximum Recording Bandwiss-Current Recording Bandwiss

Receive Bandwidth = maximum receive bandwidth-current receive bandwidth

The CPU idle threshold can be set in advance, which can be set to keep 30% or more. Determine whether the current CPU idle maintains above the CPU idle threshold. Based on the self-diagnosis results, the cameras included in the camera registration information of the other video recording apparatuses received are compared with the self-diagnosis results to select a recordable camera.

In creating a backup list, the list is made up so as not to overlap with the backup list of another video recording apparatus. The distribution of the failover is performed so that the camera performing the failover does not overlap the plurality of video recording apparatuses. When creating a backup list with each other so that the backup list of the video recording apparatus is not duplicated, the recordable cameras may be selected except for cameras added to the backup list by other video recording apparatuses by exchanging corresponding information.

For efficient distribution, priority can be applied to which video recording device first selects a camera or to which camera to select first. The order or priority of camera selection may be determined according to the current acceptable performance limit of the video recording apparatus. The camera may be selected from a video recording apparatus having a low current performance limit, so that the camera selection of the video recording apparatus having a high performance limit may not be crowded. Alternatively, in consideration of the profile of the camera to be added to the backup list, the selection priority of the camera may be set according to the required resource degree. Furthermore, the selection priority of the camera may be set according to the importance of the camera. When the importance of a camera is large and recording data retention is more important than other cameras, the selection priority of the corresponding camera may be given priority by giving a higher selection priority than other cameras.

When one video recording apparatus selects cameras of another video recording apparatus, the camera selection may be separately determined and selected for each video recording apparatus. That is, NVR 1 of FIG. 4 should not only generate a backup list for NVR 4 but also generate a backup list for cameras currently registered by NVR 2 and NVR 3. Therefore, backup lists of the remaining NVRs in case NVR 4 cannot record and backup lists of the remaining NVRs in case NVR 2 cannot record must be created.

If there is a situation where one video recording device fails to record, there is no problem because the backup list of other video recording devices does not overlap, but a video recording device occurs when a plurality of video recording devices cannot record. Since it is necessary to determine that the camera of the camera will be recorded, priority can be set according to the importance of each video recording device. Alternatively, priority may be set according to importance in units of cameras rather than units of video recording apparatus. That is, in generating a backup list, a backup list may be generated according to the priorities of the cameras, and when a camera is to be selectively recorded, the camera may be selected and recorded according to the priorities.

The processor 112 records the video of the camera when the video recording apparatus that has recorded the video of the camera included in the backup list fails to record the video of the camera. If the video recording device that is recording the video of the camera included in the backup list does not record the video of the camera, the video of the camera included in the backup list is recorded on behalf of the video recording device. Keep it. If the video recording device fails to record the video of the camera, it may be difficult to record the video of the camera currently recording the video due to a malfunction, upgrade or insufficient storage space for recording the video. . If a failure occurs, recording is impossible and recording may be stopped even when upgrading. If the storage space is insufficient, recording may be difficult while replacing the storage space or backing up image data to another storage space. That is, the situation may require a failover. As shown in FIG. 5, when a failover state such as a failure, upgrade, HDD FULL, etc. occurs in a specific video recording device NVR 4 310, a list of backup lists 410, 420, and 430 previously created in another video recording device. In accordance with the other video recording apparatus (NVR 1, NVR 2, NVR 3) performs the recording of the camera (321 to 324) image in place of the NVR 4 (310).

The processor 112 may perform only recording in recording an image of a camera included in a backup list. When recording an image of a camera other than the camera included in the backup list, it may be necessary to simultaneously perform image processing on the image for real time image output as well as recording the image. However, when recording the video of the camera included in the backup list, it is possible to preserve the video of the camera by using only the minimum resources by recording only without output and decoding the real-time video.

The processor 112 may add the camera to the camera registration information when recording the video of the camera recorded by the other video recording apparatus. Since the camera registration information is information on a camera that records an image, the video recording device adds the camera to the camera registration information when the other video recording device records an image of a camera.

The communication unit 111 transmits the camera registration information to another video recording apparatus when the camera registration information changes due to the addition of a camera. Through this, the video recording apparatuses may rewrite the backup list by exchanging the changed camera registration information.

Also, the communication unit may periodically exchange the camera registration information with another video recording apparatus or when there is a change in the video recording network environment. Even if the camera registration information is not changed, the camera registration information can be exchanged periodically, and the backup list can be rewritten if necessary. Even if a change occurs in the video recording network environment such as a new video recording device or a camera is added, the current camera registration information can be exchanged with each other to be used for setting the camera to be recorded. You can redeploy only the added equipment, or relocate the entire video recording network.

The processor 112 may stop video recording of the camera when the video recording apparatus for recording the video of the camera included in the backup list is changed to another video recording apparatus. That is, depending on the situation of failover, when recording the video of the camera included in the backup list, when the video recording device that has failed to perform the situation returns to the recordable situation again or a new video recording device is added. If the video recording apparatus for recording the video of the camera is changed to another video recording apparatus, the changed video recording apparatus may perform recording, and the processing unit 112 may stop video recording of the camera. have.

At this time, the communication unit 111 transmits the previously recorded video of the camera to another video recording apparatus that has been changed to the video recording apparatus for recording the video of the camera. The recording of the camera is performed by another changed video recording device. The video of the previously recorded camera that was previously recorded through the failover is changed to the video recording device that records the video of the camera. By transmitting to a recording device, one video recording device can be managed together.

The processing unit 112 may continue to determine whether it is difficult to record an image of the camera recording the current image due to a failure, an upgrade, or insufficient storage space for recording an image. If it is difficult to record an image of a camera currently recording a video because the storage space for performing an upgrade or recording is insufficient, the communication unit 111 transmits the current state information to another video recording device by the communication unit 111. can do. In addition to preparing for failover of other video recording devices, it is difficult to record the video of the camera currently recording the video due to a self-diagnosis, failure, upgrade or insufficient storage space to record video. Since the other video recording apparatus should replace the camera video recording, the current status information can be transmitted to the other video recording apparatus.

The storage unit 113 may store the camera registration information and the backup list. The storage unit 113 stores a backup list including camera registration information including information on cameras currently recording video and information on cameras to be failed over when a failover situation of other video recording apparatuses occurs. In addition, it is obvious that the recorded camera image can be stored.

Embodiments of the present invention may be implemented in the form of program instructions that can be executed by various computer means and recorded in a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. Program instructions recorded on the media may be those specially designed and constructed for the purposes of the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks such as floppy disks. Magneto-optical media, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. It also includes implementing in the form of a carrier wave (eg, transmission over the Internet). The computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion. And functional programs, codes and code segments for implementing the present invention can be easily inferred by programmers in the art to which the present invention belongs. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like. The hardware device described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

Those skilled in the art will appreciate that the present invention can be embodied in other specific forms without changing the technical spirit or essential features of the present invention. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. The scope of the present invention is shown by the following claims rather than the above description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

110, 120: video recording device
111: communication unit
112: processing unit
113: storage unit

Claims (6)

A communication unit for exchanging camera registration information with another video recording device;
A processor configured to select a recordable camera among cameras included in camera registration information of the other video recording apparatus, and add the selected camera to a backup list; And
A storage unit for storing the camera registration information and the backup list,
The processing unit,
If the video recording device recording the video of the camera included in the backup list fails to record the video of the camera, the video of the camera is recorded,
The camera registration information,
The video recording apparatus, wherein the video recording apparatus is information on a camera recording the current video. The method of claim 1,
The processing unit,
An acceptable performance limit is calculated using at least one of a marginal recording band whistle, a marginal reception band whistle, or a CPU idle threshold, and an image recording is selected, wherein the camera is capable of recording within the acceptable performance limit. Device. The method of claim 1,
The communication unit,
And exchange the camera registration information with another video recording device periodically or when there is a change in the video recording network environment. The method of claim 1,
The backup list,
An image recording apparatus, characterized in that it does not overlap with a backup list of another image recording apparatus. The method of claim 1,
The processing unit,
While recording the video of the camera included in the backup list, if the video recording device for recording the video of the camera is changed to another video recording device, stop recording the video of the camera,
The communication unit,
And transmit the previously recorded video of the camera to another video recording device which has been changed to a video recording device for recording the video of the camera. The method of claim 1,
The communication unit,
In case that it is difficult to record the video of the camera recording the current video due to a failure, upgrade or insufficient storage space for recording the video, the current status information is transmitted to another video recording device. Recording device.

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