CN113079351A - Data gateway, video monitoring time calibration method and monitoring system - Google Patents
Data gateway, video monitoring time calibration method and monitoring system Download PDFInfo
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- CN113079351A CN113079351A CN202110307248.2A CN202110307248A CN113079351A CN 113079351 A CN113079351 A CN 113079351A CN 202110307248 A CN202110307248 A CN 202110307248A CN 113079351 A CN113079351 A CN 113079351A
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- time
- pes
- video stream
- data gateway
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/04—Synchronising
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
- H04N5/77—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television camera
Abstract
The invention relates to the technical field of security monitoring, and discloses a data gateway, a video monitoring time calibration method and a monitoring system, wherein the data gateway comprises a processor, a memory, a communication module, a power supply module, an encoder and an interface circuit, the power supply module respectively supplies power to the processor, the memory, the communication module, the power supply module and the encoder, the power supply module is used for supplying power, the processor receives a video stream sent by a camera through the interface circuit, the processor acquires real-time from a time server through the communication module, the processor searches a PES (polyether sulfone) header of the video stream through the encoder, and then adds the acquired real-time to the PES header, in actual use, the accurate time on the time server can be acquired in real time through the data gateway, and accurate timestamp information is added in a PES (packet error correction) head of a video stream sent to the data gateway by a camera, so that the condition that the time of a video recorded by the camera cannot deviate from the real time is avoided.
Description
Technical Field
The invention relates to the technical field of security monitoring, in particular to a data gateway, a video monitoring time calibration method and a video monitoring time calibration system.
Background
The network of the present community layout has the following two situations, namely a public network environment and a local area network environment.
In a public network environment, a monitoring system of a community can acquire accurate time through a time synchronization server connected with a network, and the problem of monitoring time errors cannot be caused by videos recorded by a camera.
In a local area network environment, a monitoring system of a community cannot acquire accurate time from a time synchronization server, a calibration mechanism is lacked, and the accuracy of the time is mainly guaranteed by the accuracy of a DVR. Under normal conditions, the video recorded by the camera has an accurate time watermark, if the community is powered off, the time watermark of the video recorded by the camera has an error with the real time after the DVR or the camera is powered on and powered off again, and inconvenience is brought to the video forensics of investigators. If the accuracy of the time watermark of the recorded video of the camera in the local area network system needs to be ensured, the time needs to be regularly adjusted by the property personnel of the community, but the method is not a real-time adjustment method and has the problem of long adjustment time, the monitoring video shot by the camera still has a time error, and in addition, after manual adjustment, two sections of videos are often stored in the monitoring system in a certain time period or the videos in a certain time period are lacked. In addition, due to the limited technical capabilities of most community property personnel, the time error of the video recorded by the camera may be even greater if the property personnel forget or do not know how to adjust the DVR's time.
Disclosure of Invention
In view of the defects of the background art, the invention provides a data gateway, a video monitoring time calibration method and a video monitoring time calibration system, and aims to solve the technical problem that time errors exist in videos recorded by cameras in communities with local area networks, and therefore the method is not beneficial to evidence obtaining of investigators.
In order to solve the technical problems, the invention provides the following technical scheme: the data gateway comprises a processor, a memory, a communication module, a power supply module, an encoder and an interface circuit, wherein the power supply module supplies power to the processor, the memory, the communication module, the power supply module and the encoder respectively, the processor is electrically connected with the memory, the communication module, the encoder and the interface circuit respectively, the processor receives a video stream sent by a camera through the interface circuit, the processor acquires real-time from a time server through the communication module, the processor searches a PES (polyether sulfone) header of the video stream through the encoder, and then adds the acquired real-time to the PES header.
As a further technical scheme, the interface circuit comprises an RJ45 interface circuit, an RS485 interface circuit and a USB interface circuit.
As a further technical scheme, the communication module is a 4G communication module.
The video monitoring time calibration method applying the data gateway comprises the following steps:
s1: the processor receives a PES video stream sent by the video equipment through the interface circuit;
s2: the processor acquires real-time when the PES video stream is received by the data gateway from the time server through the communication module, and generates timestamp data according to the acquired real-time;
s3: the processor searches the PES header of the PES video stream through the encoder, and adds the time stamp data generated in step S2 to a field reserved in the PES header;
s4: the data gateway sends the timestamped PES video stream to the DVR.
As a further technical solution, the present invention further includes a decoding client, where the decoding client reads the PES video stream stored in the DVR, then extracts the time stamp data in the PES header from the PES video stream, and finally superimposes the time stamp watermark on the decoded video data.
The monitoring system comprises a camera unit, a data gateway, a DVR and a display, wherein the camera unit sends a PES video stream to the data gateway, the data gateway acquires real-time from a time server when receiving the PES video stream and adds the real-time to a PES header of the PES video stream, the data gateway sends the video stream data added with the real-time to the DVR, and the display is used for displaying the video stream data received by the DVR.
Compared with the prior art, the invention has the beneficial effects that: by adding the data gateway in the monitoring system in the community with the local area network, accurate time on the time server can be acquired in real time through the communication module, accurate timestamp information is added in the PES head of the video stream sent to the data gateway by the camera, the situation that the time of the video recorded by the camera cannot deviate from the real time can be avoided, and the time information of the DVR does not need to be adjusted manually.
Drawings
The invention has the following drawings:
FIG. 1 is a block diagram of a data gateway;
FIG. 2 is a flow chart of a video surveillance time calibration method;
fig. 3 is a block diagram of a monitoring system.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
As shown in fig. 1, the data gateway includes a processor, a memory, a communication module, a power supply module, an encoder, and an interface circuit, where the power supply module supplies power to the processor, the memory, the communication module, the power supply module, and the encoder, the processor is electrically connected to the memory, the communication module, the encoder, and the interface circuit, the processor receives a video stream sent by the camera through the interface circuit, the processor obtains real-time from a time server through the communication module, and the processor searches for a PES header of the video stream through the encoder, and then adds the obtained real-time to the PES header.
As a further technical scheme, the interface circuit comprises an RJ45 interface circuit, an RS484 interface circuit and a USB interface circuit.
As a further technical scheme, the communication module is a 4G communication module.
As shown in fig. 2, the video monitoring time calibration method, which applies the data gateway, includes the following steps:
s1: the data gateway receives a PES video stream sent by the video equipment;
s2: acquiring real-time when the PES video stream is received by the data gateway from a time server through the data gateway, and generating timestamp data according to the acquired real-time;
s3: searching a PES header of the PES video stream through the data gateway, and adding the timestamp data generated in step S2 to a field reserved in the PES header;
s4: the data gateway sends the timestamped PES video stream to the DVR.
As a further technical solution, the present invention further includes a decoding client, where the decoding client reads the PES video stream stored in the DVR, then extracts the time stamp data in the PES header from the PES video stream, and finally superimposes the time stamp watermark on the decoded video data.
As a further technical solution, in step S2, the specific step of the data gateway searching the PES header of the PES video stream is as follows: .
As shown in fig. 3, the monitoring system includes a camera unit, a data gateway, a DVR, and a display, the camera unit sends a PES video stream to the data gateway, the data gateway obtains real-time from a time server when receiving the PES video stream, and adds the real-time to a PES header of the PES video stream, the data gateway sends the video stream data added with the real-time to the DVR, and the display is used for displaying the video stream data received by the DVR.
In light of the foregoing, it is to be understood that various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (6)
1. A data gateway, characterized by: the processor is respectively electrically connected with the memory, the communication module, the encoder and the interface circuit, receives a video stream sent by a camera through the interface circuit, acquires real-time from a time server through the communication module, searches a PES (polyether sulfone) header of the video stream through the encoder, and then adds the acquired real-time to the PES header.
2. The data gateway of claim 1, wherein: the interface circuit comprises an RJ45 interface circuit, an RS485 interface circuit and a USB interface circuit.
3. The data gateway of claim 1, wherein: the communication module is a 4G communication module.
4. A video surveillance time calibration method, using a data gateway according to any of claims 1-3, characterized in that: the method comprises the following steps:
s1: the processor receives a PES video stream sent by the video equipment through the interface circuit;
s2: the processor acquires real-time when the PES video stream is received by the data gateway from the time server through the communication module, and generates timestamp data according to the acquired real-time;
s3: the processor searches the PES header of the PES video stream through the encoder, and adds the time stamp data generated in step S2 to a field reserved in the PES header;
s4: the data gateway sends the timestamped PES video stream to the DVR.
5. The video surveillance time calibration method according to claim 4, characterized in that: the decoding client reads the PES video stream stored in the DVR, extracts the time stamp data in the PES header from the PES video stream, and finally superposes the watermark with the time stamp on the decoded video data.
6. Monitoring system, its characterized in that: the system comprises a camera unit, a data gateway, a DVR and a display, wherein the camera unit sends a PES video stream to the data gateway, the data gateway acquires real-time from a time server when receiving the PES video stream and adds the real-time to a PES header of the PES video stream, the data gateway sends the video stream data added with the real-time to the DVR, and the display is used for displaying the video stream data received by the DVR.
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| CN202110307248.2A CN113079351B (en) | 2021-03-23 | 2021-03-23 | Data gateway, video monitoring time calibration method and monitoring system |
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| CN202110307248.2A CN113079351B (en) | 2021-03-23 | 2021-03-23 | Data gateway, video monitoring time calibration method and monitoring system |
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| CN113079351A true CN113079351A (en) | 2021-07-06 |
| CN113079351B CN113079351B (en) | 2022-06-07 |
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| CN101212521A (en) * | 2006-12-29 | 2008-07-02 | 中国移动通信集团公司 | Method for implementing hotline service in IP multimedia subsystem |
| CN102437975A (en) * | 2011-12-12 | 2012-05-02 | 河海大学 | Home intelligent gateway system based on advanced reduced instruction set computer (RISC) machines (ARM) 9 processor |
| CN107911362A (en) * | 2017-11-14 | 2018-04-13 | 杭州万为科技有限责任公司 | The system and method for the internet video gateway security access of lightweight |
| CN110611843A (en) * | 2019-10-18 | 2019-12-24 | 成都中航信虹科技股份有限公司 | Video processing method and device, video access gateway and storage medium |
| WO2020130798A1 (en) * | 2018-12-21 | 2020-06-25 | Mimos Berhad | A system and method for video surveillance and monitoring |
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2021
- 2021-03-23 CN CN202110307248.2A patent/CN113079351B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101212521A (en) * | 2006-12-29 | 2008-07-02 | 中国移动通信集团公司 | Method for implementing hotline service in IP multimedia subsystem |
| CN102437975A (en) * | 2011-12-12 | 2012-05-02 | 河海大学 | Home intelligent gateway system based on advanced reduced instruction set computer (RISC) machines (ARM) 9 processor |
| CN107911362A (en) * | 2017-11-14 | 2018-04-13 | 杭州万为科技有限责任公司 | The system and method for the internet video gateway security access of lightweight |
| WO2020130798A1 (en) * | 2018-12-21 | 2020-06-25 | Mimos Berhad | A system and method for video surveillance and monitoring |
| CN110611843A (en) * | 2019-10-18 | 2019-12-24 | 成都中航信虹科技股份有限公司 | Video processing method and device, video access gateway and storage medium |
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| CN113079351B (en) | 2022-06-07 |
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