CN110557615B - Video data forwarding method - Google Patents
Video data forwarding method Download PDFInfo
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- CN110557615B CN110557615B CN201910860951.9A CN201910860951A CN110557615B CN 110557615 B CN110557615 B CN 110557615B CN 201910860951 A CN201910860951 A CN 201910860951A CN 110557615 B CN110557615 B CN 110557615B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
- H04N21/478—Supplemental services, e.g. displaying phone caller identification, shopping application
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/445—Receiver circuitry for the reception of television signals according to analogue transmission standards for displaying additional information
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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
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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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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention discloses a video data forwarding method, which comprises the steps that a first storage buffer receives first video data transmitted by a first data network and transmits the first video data to a display device, so that the display device plays corresponding video contents according to the first video data; and the camera device records the video content in real time to obtain second video data, and then transmits the second video data to a second storage buffer so that the second storage buffer transmits the second video data to a second data network. By implementing the embodiment of the invention, the physical isolation between the two data networks can be ensured in the process of forwarding the video data.
Description
Technical Field
The invention relates to the technical field of video data transmission, in particular to a video data forwarding method.
Background
In the information-oriented era, network security is more and more important, and in order to reduce network attacks, a low-security network and a high-security network are usually distinguished, but the two networks are often interconnected, intercommunicated and coordinated and cannot be completely isolated. The video has large data volume and high real-time requirement, which has high requirement on the performance of the isolation system of the two networks. In the prior art, a network gate isolation method is adopted, and a security policy configuration method is utilized, so that the flow direction of network data is controlled by software, the method can also meet the requirement of transmitting a large amount of video data, but physical isolation cannot be realized, software bugs cannot be avoided, and the risk of leakage caused by network attack exists. The security policy configuration can be manually intervened, strict requirements are imposed on management, and if a high-security network is infected with viruses, the network gate still has the risk of breakdown.
Disclosure of Invention
The embodiment of the invention provides a video data forwarding method, which can ensure physical isolation between two data networks in the video data forwarding process.
An embodiment of the present invention provides a method for forwarding video data, including: the method comprises the steps that a first storage buffer receives first video data transmitted by a first data network and transmits the first video data to a display device, so that the display device plays corresponding video content according to the first video data;
and the camera device records the video content in real time to obtain second video data, and then transmits the second video data to a second storage buffer so that the second storage buffer transmits the second video data to a second data network.
Further, the first storage buffer transmits the first video data to a video preprocessing device, so that the video preprocessing device adjusts video parameters of video content corresponding to the first video data, and transmits the adjusted first video data to a display device; wherein the video parameters include brightness, contrast, and saturation.
Further, the video preprocessing device transmits the adjusted first video data to the display device, and simultaneously transmits corresponding parameter adjustment information when the video parameters of the video content are adjusted to the display device.
Further, the display device displays the parameter adjustment information while playing the video content corresponding to the first video data.
Further, the camera device records the parameter adjustment information displayed by the display device while recording the video content in real time, so as to obtain parameter adjustment data, and the parameter adjustment data and the second video data are transmitted to a second storage buffer.
Further, the second storage buffer transmits the second video data to a second data network, including:
the first storage buffer transmits the second video data to a video recovery device, so that the video recovery device performs parameter adjustment on video content in the second video data to obtain adjusted second video data, and then transmits the adjusted second video data to a second data network; the video recovery device receives the parameter adjustment data transmitted by the second buffer, extracts parameter adjustment information in the parameter adjustment data through image identification, and performs parameter adjustment on video content in the second video data according to the parameter adjustment information.
Further, when the first data network is a low-security network, the second data network is a high-security network; and when the first data network is a high-security network, the second data network is a low-security network.
Further, the display device and the camera device are both connected with a heat dissipation device.
The implementation of the invention has the following beneficial effects:
the embodiment of the invention provides a video data forwarding method, wherein a first storage buffer receives video data of a first data network, namely first video data, then the video data is transmitted to a display device, the display device plays video content corresponding to the video data, a camera device records the video content while playing, then the recorded video data, namely second video data, is sent to a second storage buffer and is sent to a second data network by the second storage buffer, the video content in the first video data and the video content in the second video data are consistent in the forwarding process, the video content is forwarded by adopting the method, in the whole forwarding process, direct physical connection does not exist between the first data network and the second data network, the physical isolation of the two data networks is realized, and even if any one data network is attacked, the other network is not influenced, and the safety of the data network is improved.
Drawings
Fig. 1 is a flowchart illustrating a method for forwarding video data according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an overall apparatus in a video data forwarding method according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the present invention provides a method for forwarding video data, including:
step S101, a first storage buffer receives first video data transmitted by a first data network and transmits the first video data to a display device, so that the display device plays corresponding video content according to the first video data.
And S102, the camera device records the video content in real time to obtain second video data, and then transmits the second video data to a second storage buffer so that the second storage buffer transmits the second video data to a second data network.
Initiating video transmission by a first data network, sending a piece of video data (first video data) to a first storage buffer, then forwarding the video data to a display device by the first storage buffer, playing video content corresponding to the first video data by the display device, simultaneously recording the content played by the display device by a camera device while the corresponding video content is played by the display device, then sending the recorded video data (second video data) to a second storage buffer, then forwarding the video data to a second data network, and completing the whole process of transmitting the video data from the first data network to the second data network, wherein in the process, although the first video data is not directly transmitted to the second data network, the video content corresponding to the first video data and the second video data is consistent, thereby completing the forwarding of the video content, in the whole process, because the display device and the camera device are not directly and physically connected, the first data network and the second data network are not directly and physically connected, and the physical isolation between the two data networks is realized, so that the data leakage of the other data network cannot be influenced no matter which data network is attacked and crashed.
In a preferred embodiment, when the first data network is a low security network, the second data network is a high security network; and when the first data network is a high-security network, the second data network is a low-security network. This embodiment uses the methods of step S101 and step S102 in the high security network and the low security network, and the video data is transmitted from the low security network to the high security network or from the high security network to the low security network. The low security network and the high security network are physically isolated, the data of the high security network cannot be read even if the low security network is attacked and crashed, and the data cannot be leaked even if the high security network has internal faults or misoperation.
In a preferred embodiment, for step S101, the first storage buffer transmitting the first video data to the display device includes:
the first storage buffer transmits the first video data to a video preprocessing device, so that the video preprocessing device adjusts video parameters of video content corresponding to the first video data and transmits the adjusted first video data to a display device; wherein the video parameters include brightness, contrast, and saturation.
In this embodiment, the first storage buffer does not directly transmit the first video data to the display device, but transmits the first video data to the video preprocessing device, and then transmits the adjusted video data to the display device after the first video data is adjusted by the video preprocessing device.
When the video preprocessing device adjusts the first video data, it mainly adjusts parameters such as brightness, contrast, saturation, etc. of the video for the whole or part of the video content corresponding to the first video data, for example: and dimming the local over-bright places and enhancing the contrast. (of course, the specific adjusted parameters may be set according to actual conditions, and are not limited to the above 3 data items, but may also include more parameter items) and then the adjusted first video data is transmitted to the display device. The quality of the video content corresponding to the first video data is better displayed more clearly when the video content is played through parameter adjustment.
Since the video pre-processing device needs some time when adjusting the first video data, the first memory buffer is needed to buffer some data that cannot be adjusted by the video pre-processing device, so as to ensure the integrity of the data.
In a preferred embodiment, the video preprocessing device transmits the adjusted first video data to the display device, and simultaneously transmits corresponding parameter adjustment information when adjusting the video parameters of the video content to the display device. When the video preprocessing device adjusts the first video data, the video preprocessing device may have corresponding parameter adjustment information, such as a contrast value. The video preprocessing device also sends the parameter adjustment information to the display device when transmitting the first video data to the display device.
In a preferred embodiment, the display device displays the parameter adjustment information while playing the video content corresponding to the first video data. When the display device displays, the whole display screen is divided into two areas, one area displays the data content corresponding to the first video data, and the other area displays the adjustment information (i.e. the parameter adjustment information) of the video.
In step S102, in a preferred embodiment, the image capturing device records the parameter adjustment information displayed by the display device while recording the video content in real time, so as to obtain parameter adjustment data, and the parameter adjustment data and the second video data are transmitted to a second storage buffer. In this embodiment, the image capturing device records not only the video content corresponding to the first video data, but also records the parameter adjustment information, that is, the contents of the two areas displayed by the display device in the above preferred embodiment are recorded. The recorded adjustment information and the second video data are then sent to a video recovery device.
In a preferred embodiment, the second memory buffer transmits the second video data to a second data network, including: the second storage buffer sends the second video data to a video recovery device, so that the video recovery device performs parameter adjustment on video content in the second video data and transmits the adjusted second video data to a second data network; the video recovery device receives the parameter adjustment data transmitted by the second buffer, extracts parameter adjustment information in the parameter adjustment data through image identification, and performs parameter adjustment on video content in the second video data according to the parameter adjustment information.
In this embodiment, the second storage buffer does not directly transmit the second video data to the second data network, but transmits the recorded second video data and the parameter adjustment data to the video recovery device, the video recovery device extracts the parameter adjustment information through image recognition, and then performs parameter adjustment on the video content in the second video data according to the parameter adjustment information, so as to implement high restoration of the video content, and then transmits the adjusted second video data to the second data network, thereby implementing forwarding of the final video data. Secondly, in the adjusting process, the data received by the video restoring device may include some other information such as a frame of a display screen of the display device, besides the video content and the parameter adjusting information, and at this time, the video restoring device may remove the redundant information.
In a preferred embodiment, the display device may be a high-definition display screen, and the camera device is a high-definition camera. The display device and the high-definition camera are sealed in a container, so that the whole playing and recording environment is not influenced by external factors such as light, dust, water vapor and the like, the stability of the system is ensured, and the quality of recorded video data is improved.
In a preferred embodiment, the high-definition display screen and the high-definition camera both process a large amount of video data, and generate a large amount of heat. The two devices are arranged in the sealing device, and the heat dissipation is not good, so that the heat dissipation device is required to be added to discharge heat to the outside of the sealing device, and the normal operation of the system is ensured.
The increased heat dissipation device mainly comprises an aluminum block and heat-conducting silicone grease, wherein the aluminum block is bonded with the high-definition display screen or the main heating part of the high-definition camera through the heat-conducting silicone grease and is in full contact with the main heating part of the high-definition display screen or the high-definition camera. The aluminum block needs to extend out of the sealing device, heat does not pass through the metal shell of the sealing device, and heat conductivity is better. The high-definition camera has larger heat productivity than a high-definition display screen and has larger aluminum block. A schematic diagram of a hardware structure corresponding to an embodiment of the method of the present invention is shown in fig. 2.
The embodiment of the invention has the following beneficial effects:
the embodiment of the invention provides a video data forwarding method, wherein a first storage buffer receives video data of a first data network, namely first video data, then the video data is transmitted to a display device, the display device plays video content corresponding to the video data, a camera device records the video content while playing, then the recorded video data, namely second video data, is sent to a second storage buffer and is sent to a second data network by the second storage buffer, the video content in the first video data and the video content in the second video data are consistent in the forwarding process, the video content is forwarded by adopting the method, in the whole forwarding process, direct physical connection does not exist between the first data network and the second data network, the physical isolation of the two data networks is realized, and even if any one data network is attacked, the other network is not influenced, and the safety of the data network is improved.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (3)
1. A method for forwarding video data, comprising:
the method comprises the steps that a first storage buffer receives first video data transmitted by a first data network and transmits the first video data to a display device, so that the display device plays corresponding video content according to the first video data; wherein the first memory buffer transmits the first video data to the display device, comprising: the first storage buffer transmits the first video data to a video preprocessing device, so that the video preprocessing device adjusts video parameters of video content corresponding to the first video data and transmits the adjusted first video data to a display device; wherein the video parameters include brightness, contrast, and saturation; the video preprocessing device transmits the adjusted first video data to the display device and simultaneously transmits corresponding parameter adjustment information when video parameters of the video content are adjusted to the display device; the display device displays the parameter adjustment information while playing the video content corresponding to the first video data;
the camera device records the video content in real time to obtain second video data, and then transmits the second video data to a second storage buffer so that the second storage buffer transmits the second video data to a second data network; the camera device records the parameter adjustment information displayed by the display device while recording the video content in real time to obtain parameter adjustment data, and the parameter adjustment data and the second video data are transmitted to a second storage buffer; the second memory buffer transmits the second video data to a second data network, including: the second storage buffer transmits the second video data to a video recovery device, so that the video recovery device performs parameter adjustment on video content in the second video data and transmits the adjusted second video data to a second data network; the video recovery device receives the parameter adjustment data transmitted by the second buffer, extracts parameter adjustment information in the parameter adjustment data through image identification, and performs parameter adjustment on video content in the second video data according to the parameter adjustment information.
2. The method for forwarding video data according to claim 1, wherein when the first data network is a low security network, the second data network is a high security network; and when the first data network is a high-security network, the second data network is a low-security network.
3. The method for forwarding video data according to claim 1, wherein the display device and the camera device are connected to a heat sink.
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| CN201910860951.9A CN110557615B (en) | 2019-09-11 | 2019-09-11 | Video data forwarding method |
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Citations (3)
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| US9967234B1 (en) * | 2016-04-27 | 2018-05-08 | The United States Of America, As Represented By The Secretary Of The Navy | Miniaturized real time pseudo-cross domain data communication system with air gapped full motion video device and method |
| CN108259446A (en) * | 2016-12-29 | 2018-07-06 | 航天信息股份有限公司 | A kind of method and device based on isolation network transmission data |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101043615A (en) * | 2006-03-20 | 2007-09-26 | 王建 | Intrinsic safety remote data monitoring system and monitoring method thereof |
| CN101455029A (en) * | 2006-03-20 | 2009-06-10 | 王建 | Intrinsically safe data remote monitoring system and monitoring method thereof |
| US9967234B1 (en) * | 2016-04-27 | 2018-05-08 | The United States Of America, As Represented By The Secretary Of The Navy | Miniaturized real time pseudo-cross domain data communication system with air gapped full motion video device and method |
| CN108259446A (en) * | 2016-12-29 | 2018-07-06 | 航天信息股份有限公司 | A kind of method and device based on isolation network transmission data |
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