CN110830744B - Safety interaction system - Google Patents
Safety interaction system Download PDFInfo
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- CN110830744B CN110830744B CN201810919462.1A CN201810919462A CN110830744B CN 110830744 B CN110830744 B CN 110830744B CN 201810919462 A CN201810919462 A CN 201810919462A CN 110830744 B CN110830744 B CN 110830744B
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- client
- control instruction
- image data
- video
- output unit
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/10—Adaptations for transmission by electrical cable
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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]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
- H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
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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
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
Abstract
The invention discloses a safety interaction system, comprising: the system comprises a control instruction output unit, a video encoder and at least two clients; the control instruction output unit is used for outputting a control instruction; the video encoder is used for encoding the control instruction into image data; the image data is transmitted to each client through a one-way video transmission line; the client is used for receiving the image data and decoding the image data into the control instruction. Through the embodiment of the invention, the safe interaction of a plurality of clients can be realized, the original network security of each client is not changed in the whole interaction process, and the problem of data leakage on the network or among the clients caused by the fact that each client receives the interaction of the same interaction terminal (or a control instruction output unit) is avoided.
Description
Technical Field
The embodiment of the invention relates to the technical field of information transmission, in particular to a system and a method for realizing safe interaction.
Background
In some specific applications, due to the requirement of security, many computers need to be isolated or placed in isolation in a network environment, most of the existing interaction technologies cannot perform secure interaction on the computers through a unified interaction terminal, and the computers and the interaction terminal are generally exposed to the same network environment in a unified manner, which is realized at the cost of sacrificing security.
In order to build a secure network environment, some techniques attempt to transmit instructions and information using unidirectional transmission lines. However, if instructions and information are transmitted using a serial port line, although the transmission real-time performance is high, the transmission speed of the serial port line cannot meet the requirement of the transmission speed when a large amount of data is processed.
Disclosure of Invention
In order to solve the above problem, a first aspect of the present invention provides a secure interaction system, including:
the system comprises a control instruction output unit, a video encoder and at least two clients;
the control instruction output unit is used for outputting a control instruction;
the video encoder is used for encoding the control instruction into image data;
the image data is transmitted to each client through a one-way video transmission line;
the client is used for receiving the image data and decoding the image data into the control instruction.
According to some embodiments of the invention, the unidirectional video transmission line comprises a video card, a splitter;
the video encoder, the display card and the deconcentrator are sequentially connected through a video data line;
the splitter is configured to split the video data line into at least two.
According to some embodiments of the invention, the unidirectional video transmission line comprises at least two video cards;
the video encoder and the display card are connected through a video data line.
4. The system of claim 1, wherein:
the client further comprises a video capture card and a video decoder;
the video capture card is used for receiving the image data and transmitting the image data to the video decoder.
According to some embodiments of the present invention, each of the clients is configured to decode only image data of a corresponding region portion previously assigned to the client among the image data.
According to some embodiments of the invention, the control instruction comprises an identification of the client;
the client judges whether the control instruction belongs to the control instruction of the client according to the identification of the client; and if the control instruction belongs to the control instruction of the client, responding according to the control instruction.
According to some embodiments of the present invention, the control instruction output unit is a touch screen.
According to some embodiments of the invention, the client responds according to the control instruction.
A second aspect of the present invention provides a method for interacting with a plurality of clients, the method comprising:
outputting a control instruction to the client;
encoding the control instruction into image data;
transmitting the image data to each client through a one-way video transmission line;
the client decodes the image data into the control instructions.
According to some embodiments of the invention, the control instruction comprises an identification of the client;
the method comprises the following steps: the client judges whether the control instruction belongs to the control instruction of the client according to the identification of the client; and if the control instruction belongs to the control instruction of the client, responding according to the control instruction.
Through the embodiment of the invention, the safe interaction of a plurality of clients can be realized, the original network security of each client is not changed in the whole interaction process, and the problem of data leakage on the network or among the clients caused by the fact that each client receives the interaction of the same interaction terminal (or a control instruction output unit) is avoided.
Drawings
FIG. 1 is a schematic diagram of a secure interaction system of an embodiment of the invention;
FIG. 2 is a flowchart illustrating a control command transmission method according to an embodiment of the present invention;
FIG. 3 is a block diagram of an apparatus included in an instruction receiving server according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of an apparatus for unidirectional video data lines according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of an apparatus for unidirectional video data lines according to another embodiment of the present invention;
FIG. 6 is a diagram illustrating a frame of image data according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in further detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention.
It should be further noted that, for the convenience of description, only some but not all of the relevant aspects of the present invention are shown in the drawings. Before discussing exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart may describe the operations (or steps) as a sequential process, many of the operations can be performed in parallel, concurrently or simultaneously. In addition, the order of the operations may be re-arranged. The process may be terminated when its operations are completed, but may have additional steps not included in the figure. The processes may correspond to methods, functions, procedures, subroutines, and the like.
FIG. 1 is a schematic block diagram of a system for client interaction for more than two computers (e.g., at least two) according to one embodiment of the invention.
The system comprises a control instruction output unit 1, a video encoder 2, and clients 31, 32, 33, as shown in the figure.
Wherein each client is identified by setting an ID, or the client may be identified by some identification already carried by the client itself.
Wherein, for the purpose of network security, the clients 31, 32, 33 of the present invention may be completely isolated and completely isolated from each other, so as not to allow data access between sub-clients.
The control instruction output unit 1 is used for sending out control instructions to each client;
the video encoder 2 is used for encoding the control instruction into image data suitable for video data line transmission, and then transmitting the image data to each client through a one-way video transmission line; the control instruction comprises ID information of a client to be controlled;
the control command may be, but is not limited to, a power-on command, a power-off command, a play command, a fast-forward command, a pause command, and the like.
The video data line includes, but is not limited to, any one of the following: audio and Video Cable (AV line), S terminal line, tristimulus line, Video Graphics Array (VGA), Digital Video Interface (DVI), High Definition Multimedia Interface (HDMI), and the like.
FIG. 2 is a schematic diagram of an image data encoding and decoding method according to an embodiment of the invention.
In step 101, performing quantization processing on the content included in the control instruction, and taking a corresponding quantization value as a first image pixel value; specifically, the control instruction information is converted into a long character string, the whole character string is converted into corresponding binary bits, one byte corresponds to 8 binary bits, the total number of the binary bits is 8 times of the total number of the bytes, the total number of the bytes of the character string is calculated, a binary sequence is formed, and each binary number (namely 0 or 1) in the binary sequence is used as a first image pixel value. Wherein the quantization may represent each character with 0 or 1, or with 0 or 255. Or, normalizing the numerical value corresponding to each character between 0 and 255 to make the quantization value corresponding to each character be any numerical value between 0 and 255, and the like.
Then, in step 202, a blank image (i.e. an image with all pixel values of 0 or 1) is created, the total number of bytes of pixels of the blank image is greater than or equal to the calculated total number of bytes, and the pixel value of the first image is written into the corresponding position of the blank image, so as to obtain the image data.
Specifically, a blank image can be created by using an opencv open source library, and then the converted binary sequence is sequentially written into the blank image, one binary bit occupies one pixel value, and 8 continuous 1 s are used as binary sequence end marks.
In this embodiment, a fault-tolerant mechanism is considered, i.e. when encoding, 0 and 1 are not directly stored, but 0 is stored if the value is 0, 255 is stored if the value is 1, after transmission, even if the pixel value is slightly changed, for example, some 0 is changed into 3 or 5, some 255 is changed into 245 or 251, etc., the image received by the receiving end is binarized, for example, the binarization threshold value is 128, if the value is less than 128, 0 is set, and if the value is greater than 128, 1 is set, so that the loss in the transmission process is accommodated, and the original information can be completely recovered.
Then, in step 103, the image data is transmitted using the video data line.
Accordingly, an embodiment of the present invention provides a graphic data decoding method. After the device receiving the control instruction receives the image data, for example, the instruction receiving server in fig. 1 may decode the image data by using an encoding method corresponding to the sending device to obtain corresponding information, traverse the pixel values from the beginning for the image data, parse each obtained 8 values into one byte, store the byte into the byte array, and if the end flags are consecutive 8 1, indicate that all the encoded methods have been obtained, stop the traversal, and convert the byte array into a character string, that is, complete the entire encoding- > transmission- > decoding process.
The unidirectional video transmission line may be configured to transmit a video data line through an image adapter (e.g., a video card), and at the instruction receiving server, for example, the receiving server 310, the video capture card 3101 may be configured to receive image data, and decode the received image data through the video decoder 3102 according to the decoding method described above, as shown in fig. 3. In the embodiment of the invention, the unidirectional transmission of the image adapter and the video acquisition card is utilized, so that the unidirectional video transmission line is realized, and the safety of the system is ensured.
As shown in fig. 4, a corresponding number of display cards, such as display cards 41, 42, 43, may be provided for connecting to a plurality of video data lines, respectively, and then transmitting image data to a plurality of clients; it is also possible to provide only one video card 4 as shown in fig. 5, and to divide the video data line into a plurality of video data lines using a splitter 5 and then transmit the image data to a plurality of clients.
As shown in fig. 6, is a format of image data per frame transmitted every second. Wherein each frame of image data includes image areas corresponding to the number of the respective clients according to the number of the clients. For example, as shown in the figure, the case where the number of clients is 3, where 3 partial image data areas are set to be combined into one image data frame for storing a control instruction per second. For example, at time t1, if the control command is to perform a control operation on the 2 nd client 32, for example, if the control command is to open a file of the client, the frame image data of the control command corresponding to time t1 is the image data of the image area located in the data area of the client 32, and the rest of the frame image data may be blank image data. The control instruction at time t1 may also include control of two or more clients, in which case the frame image data at time t1 includes image data of two or more client areas.
Also, each client image data area in the image data into which the control instruction is encoded may also be set with a corresponding client ID to identify the client data area, for example, ID1 is the data area identification of client 31.
The client may be preset to read only the corresponding area in the frame image. After the image data is sent to each client through the video data lines connected with each client, each client reads the preset image belonging to the part of the client and decodes the image, and sends the control instruction to the corresponding client according to the client ID in the control instruction, and the client responds according to the control instruction.
In another embodiment of the present invention, the client may not set in advance to read only the corresponding area, but set the client ID in the control instruction and encode it in the image data. After reading and decoding the image data of all the areas by the client, judging whether the image data belongs to a control instruction in the client according to the ID of the client; if the control command belongs to the control command in the client, responding according to the control command; if not, no response is made.
In the embodiment, the control instruction is encoded into the image data suitable for transmission, the image data is transmitted through the one-way video transmission line, received and correspondingly decoded by the client, and sent to the corresponding client according to the acquired control instruction, so that the control operation on the client can be realized, the network security of the original client can be maintained, and the security of the network interaction system is improved.
In some embodiments of the present invention, the control command output unit 1 may be a touch screen, such as an infrared light curtain type touch screen, an infrared vector pressure sensing type touch screen, a capacitive type touch screen, a resistive type touch screen, an infrared frame type touch screen, a near field imaging type touch screen, an electromagnetic induction type touch screen, a surface acoustic wave type touch screen, and the like.
In some embodiments of the present invention, the control instruction may be input through a touch action, or an action of writing "M", "O", or the like on the screen, or a motion sensing action, or the like.
In some embodiments of the invention, the control instructions may include: open a file, close a file, etc.; the response may include, for example: output a file to be opened to a display unit, or close the file, etc.
In some embodiments of the present invention, the control instruction output unit 1 in the system may be a large touch screen composed of a plurality of sub-screens, and a user may input control instructions to the plurality of sub-screens to control different clients.
In addition, the transmission of the image data provided by the embodiment of the invention can be realized in a software and/or hardware mode. The client may be, but is not limited to, a tablet computer, a smart phone, a desktop computer, and the like.
The information transmission device according to the above embodiments is also used to perform the information transmission method according to the above embodiments, and the technical principle and the technical effect thereof are similar, and will not be described in detail herein.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (6)
1. A secure interaction system, comprising:
the system comprises a control instruction output unit, a video encoder and at least two clients;
the control instruction output unit is used for outputting a control instruction;
the video encoder is used for encoding the control instruction into image data, and setting corresponding client identification in the image data to identify a corresponding area part pre-allocated to each client;
the image data is transmitted to each client through a one-way video transmission line;
the client is used for receiving the image data and decoding the image data into the control instruction;
the unidirectional video transmission line comprises a display card and a deconcentrator;
the video encoder, the display card and the deconcentrator are sequentially connected through a video data line;
the deconcentrator is used for dividing the video data line into at least two lines; each client is used for reading and decoding only the image data of the corresponding area part which is allocated to the client in advance in the image data.
2. The system of claim 1, wherein:
the unidirectional video transmission line comprises at least two display cards;
the video encoder and the display card are connected through a video data line.
3. The system of claim 1, wherein:
the client further comprises a video capture card and a video decoder;
the video capture card is used for receiving the image data and transmitting the image data to the video decoder.
4. The system of claim 1, wherein:
the control instruction comprises an identification of the client;
the client judges whether the control instruction belongs to the control instruction of the client according to the identification of the client; and if the control instruction belongs to the control instruction of the client, responding according to the control instruction.
5. The system according to any one of claims 1-4, wherein:
the control instruction output unit is a touch screen.
6. The system according to any one of claims 1-4, wherein: and the client side responds according to the control instruction.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810919462.1A CN110830744B (en) | 2018-08-10 | 2018-08-10 | Safety interaction system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810919462.1A CN110830744B (en) | 2018-08-10 | 2018-08-10 | Safety interaction system |
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| CN110830744A CN110830744A (en) | 2020-02-21 |
| CN110830744B true CN110830744B (en) | 2021-10-15 |
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| CN201810919462.1A Active CN110830744B (en) | 2018-08-10 | 2018-08-10 | Safety interaction system |
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| JP2013108794A (en) * | 2011-11-18 | 2013-06-06 | Mitsubishi Electric Engineering Co Ltd | Inspection apparatus |
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| CN102263998A (en) * | 2011-07-11 | 2011-11-30 | 深圳市同洲电子股份有限公司 | Receiving method and device for digital television |
| CN202197279U (en) * | 2011-08-22 | 2012-04-18 | 珠海网博信息科技有限公司 | Data one-way transmission security system |
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