CN118101996B - Universal large-screen content release system - Google Patents
Universal large-screen content release system Download PDFInfo
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- CN118101996B CN118101996B CN202410490616.5A CN202410490616A CN118101996B CN 118101996 B CN118101996 B CN 118101996B CN 202410490616 A CN202410490616 A CN 202410490616A CN 118101996 B CN118101996 B CN 118101996B
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- 230000004044 response Effects 0.000 claims description 19
- 238000009826 distribution Methods 0.000 claims description 16
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- 230000008569 process Effects 0.000 claims description 13
- 238000004458 analytical method Methods 0.000 claims description 12
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- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000006870 function Effects 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
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Classifications
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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
- H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
- H04N21/2389—Multiplex stream processing, e.g. multiplex stream encrypting
- H04N21/23895—Multiplex stream processing, e.g. multiplex stream encrypting involving multiplex stream encryption
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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
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
- H04N21/4385—Multiplex stream processing, e.g. multiplex stream decrypting
- H04N21/43853—Multiplex stream processing, e.g. multiplex stream decrypting involving multiplex stream decryption
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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 or rendering scenes according to encoded video stream scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
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Abstract
The invention relates to the technical field of information release, and particularly discloses a universal large-screen content release system, which comprises the following components: the system comprises a core server, an encryption module, a plurality of large screen driving servers, a plurality of large screen driving boards and a plurality of large screen devices, wherein each large screen driving server is connected with one or a plurality of large screen devices, and each large screen driving board is connected with one large screen device; the core server is used for auditing the general program content, encrypting the audited general program content and issuing the encrypted general program content to the large-screen driving server or the large-screen driving board; the large screen driving server or the large screen driving board is used for decrypting the encrypted general program content, converting the decrypted general program content into private program content, and sending the private program content to the corresponding large screen equipment for display. The invention can realize the functions of one-time manufacture, one-key release and real-time monitoring, simultaneously ensure the authenticity and legitimacy of release contents and avoid any adverse effect.
Description
Technical Field
The invention relates to the technical field of information release, in particular to a universal large-screen content release system.
Background
The large screen products in the market have a plurality of brands and different materials, and are mainly divided into an LED and an LCD. Different brands and large screens of different materials often adopt different device drivers and technical schemes, and therefore special management software is required. This causes a problem: if a large screen of multiple brands and materials is mixed in one project, the management is very troublesome. The same program may need to be made and distributed multiple times, and the running state of the device may need to be obtained from multiple systems separately. Meanwhile, release systems of some manufacturers have the risk of tampering with the content in the release process, and once the released content is tampered with, serious legal and social consequences can be caused.
Disclosure of Invention
Aiming at the defects and shortcomings in the prior art, the invention provides a universal large-screen content release system, which realizes the functions of one-time manufacture, one-key release and real-time monitoring, ensures the authenticity and legality of released content, and avoids any adverse effect.
As a first aspect of the present invention, there is provided a general large screen content distribution system including a core server, an encryption module, a plurality of large screen driving servers, a plurality of large screen driving boards, and a plurality of large screen devices, each of the large screen driving servers being connected to one or more large screen devices, each of the large screen driving boards being connected to one large screen device;
the core server is used for making general program content and auditing the general program content; then, the encryption module is called to encrypt the checked general program content so as to generate encrypted general program content; finally, the encrypted general program content is issued to a large screen driving server or a large screen driving board;
The large screen driving server or the large screen driving board is used for calling the encryption module to decrypt the encrypted general program content, converting the decrypted general program content into private program content which can be identified by different large screen devices, and then sending the private program content to the corresponding large screen devices;
the large screen device is used for displaying corresponding private program content.
Further, each large screen driving server and each large screen driving board comprise a core service communication module, a driving service upgrading module, a large screen type detection module and a plurality of large screen driving modules;
The core service communication module is in charge of carrying out data interaction with the core server, and selecting a large screen driving program range used by the large screen equipment which is currently connected according to an instruction of the core server; the basic information and the basic state of the currently connected large-screen equipment are reported to the core server; receiving general program content issued by the core server, and calling a corresponding large screen driving module to perform private program content conversion;
The driving service upgrading module is responsible for managing and updating the large screen driving program, dynamically loading the newly added large screen driving program into the large screen driving module according to the requirement of a user, so that the universal large screen content release system can support new brands and models of large screen equipment or update the large screen device driving program with the existing brands and models without restarting the universal large screen content release system;
The large screen driving module comprises a plurality of large screen driving programs, so that each large screen driving server can support a plurality of large screen devices at the same time; the large screen driving module converts the decrypted general program content into private program content which can be identified by currently connected large screen equipment and is responsible for realizing the control and display of different large screen equipment;
The large screen type detection module automatically identifies large screen equipment in a network according to the configuration of the large screen driving module and acquires basic information of the large screen equipment; basic information of the identified large-screen equipment is fed back to the core server through the core service communication module;
and the large screen driving board and the large screen driving server automatically identify and match large screen equipment connected with the large screen driving board and the large screen driving server according to the large screen driving program range configured by the core server.
Further, the large screen driving board also comprises a safety module, a release content analysis module and a release content display module;
The security module is used for decrypting the general program content issued by the core server and encrypting the information reported to the core server by the large screen driving board; the key updating instruction issued by the core server can be received so as to update the key of the key updating instruction;
The release content analysis module is used for analyzing the general program content released by the core server into interface information which can be displayed by corresponding large-screen equipment;
and the release content display module is used for outputting the analyzed interface information to corresponding large-screen equipment for display.
Further, the release content analysis module is specifically configured to download a media resource in the universal program content, and download the media resource to a local storage of the large screen driving board in a network request manner according to a uniform resource locator URL of the media resource, so as to facilitate subsequent processing and display;
The release content analysis module is specifically used for generating interface information according to the positions and the layout of various media resources in the general program content; wherein, using graphic library or frame to render various media resources to a virtual canvas to form a complete interface information;
The release content display module is specifically configured to convert the content of the virtual canvas into an HDMI signal for transmission to a corresponding large screen device.
Further, the large screen driving board selects a corresponding large screen driving program according to different large screen devices so as to control and display the large screen devices, wherein the principle that the large screen driving board is automatically matched with the large screen devices is as follows:
The first step, the large screen driving board checks whether the large screen driving program is updated on the core server through the driving service upgrading module, and if so, the large screen driving program is downloaded and updated; the large screen driving board is provided with a large screen driving program queue, and the large screen driving program queue is a set of large screen driving programs which are arranged according to a certain sequence;
Step two, the large screen driving board sequentially takes out large screen driving programs from the large screen driving program queue in sequence, wherein the large screen driving programs comprise detection packets, and the detection packets are broadcasted into a local area network to inquire whether large screen equipment exists in the network;
thirdly, after the large screen device receives the detection packet, judging whether to respond according to the private protocol of the large screen device; if the large screen device considers that the detection packet is legal, replying a response packet to the source IP address of the detection packet so as to tell the large screen drive board of the existence of the large screen device;
Fourth, the large screen driving board can check whether the received response packet is correct; if the response packet is correct, the current large screen driver is matched with the large screen device, the current large screen driver is solidified, namely the large screen driver is stored in a memory of a large screen driver board, if the communication between the large screen driver board and the connected large screen device is always kept normal, the current large screen driver is not needed to be taken out from the large screen driver queue, and the large screen driver board directly uses the solidified large screen driver to control and display the large screen device; if the communication between the large screen driving board and the connected large screen equipment is abnormal for a certain time, the large screen driving board returns to the second step to restart the detection flow so as to find whether new large screen equipment connected with the large screen driving board exists; if the response packet is incorrect or the response is overtime, the current large screen driver is not matched with the large screen device, the current large screen driver is discarded, then the next large screen driver is taken out of the large screen driver queue, the steps are repeated until a matched large screen driver is found, if all the large screen drivers are not matched with the corresponding large screen device, the large screen driver board is quiesced for a period of time, and then the process returns to the second step to restart the large screen detection process;
The principle of the large screen driving server automatically matching the large screen equipment is similar to that of the large screen driving board, except that the large screen driving server can simultaneously use a plurality of different large screen driving programs to match a plurality of different large screen equipment, and simultaneously, the large screen driving programs corresponding to the different large screen equipment are solidified in the memory of the large screen driving server.
Further, the driving service upgrading module stores the latest version of all large screen driving programs and the latest version of the large screen type detection module, wherein the upgrading principle of the large screen driving server or the upgrading principle of the large screen driving board is as follows:
when the large screen driving server or the large screen driving board is started, firstly checking whether the large screen type detection module has a new version, and if so, downloading and installing the large screen type detection module;
then, the large screen driving server or the large screen driving board runs the program of the large screen type detection module to determine the type of the current large screen equipment;
then, the large screen type detection module checks whether a large screen driving program of the current large screen equipment type exists in the large screen driving server or the large screen driving board; if yes, comparing whether the version number of the large screen driving program in the large screen driving server or the large screen driving board is consistent with the version number in the driving service upgrading module; if the two types are consistent, no upgrading is needed; and if the driver is inconsistent, downloading and installing the large screen driver of the latest version from the driver service upgrading module.
Further, the core server and each large screen driving server adopt a unified MQTT protocol for communication, and the core server and each large screen driving board adopt a unified MQTT protocol for communication.
Further, the large screen driving board is provided with a network interface and an HDMI interface, and the large screen driving server is provided with only the network interface.
Further, the large screen driving board is directly installed in the large screen equipment or hung outside the large screen equipment, and the large screen driving server is installed in a computer of the machine room.
The universal large-screen content release system provided by the invention has the following advantages: the large screen with different brands and different materials can be compatible, the functions of one-time manufacture, one-key release and real-time monitoring are realized, the authenticity and the legality of released contents are ensured, and any adverse effect is avoided.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate the invention and together with the description serve to explain, without limitation, the invention.
Fig. 1 is a block diagram of a general large screen content distribution system according to the present invention.
Fig. 2 is a block diagram of a large screen driving server according to the present invention.
Fig. 3 is a block diagram of a large screen driving board according to the present invention.
Fig. 4 is an upgrade schematic diagram of a large screen driving server or a large screen driving board provided by the present invention.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the invention herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In this embodiment, a general large-screen content distribution system is provided, and fig. 1 is a block diagram of the general large-screen content distribution system provided by the present invention. As shown in fig. 1, the general large screen content distribution system includes a core server, an encryption module, a plurality of large screen driving servers, a plurality of large screen driving boards and a plurality of large screen devices, wherein each large screen driving server is connected with one or a plurality of large screen devices, and each large screen driving board is connected with one large screen device;
the core server is used for making general program content and auditing the general program content; then, the encryption module is called to encrypt the checked general program content so as to generate encrypted general program content; finally, the encrypted general program content is issued to a large screen driving server or a large screen driving board;
The large screen driving server or the large screen driving board is used for calling the encryption module to decrypt the encrypted general program content, converting the decrypted general program content into private program content which can be identified by different large screen devices, and then sending the private program content to the corresponding large screen devices;
the large screen device is used for displaying corresponding private program content.
The encryption module can be an encryption/decryption machine or an encryption/decryption server, and the large-screen driving server can be a North tile driving server, a smart message driving server and the like; the LED screen can be a Norwa LED screen, a smart LED screen and the like.
Specifically, the functions of the core server comprise user management, media resource auditing, program production, program release and the like, and the core server is communicated with the large screen driving server or the large screen driving board by adopting a unified MQTT protocol, so that the effects of one-time production and one-key release are realized, and large screens with different brands and materials are supported. The function of the encryption module is to provide encryption and decryption services for the data. For example, when the core server distributes program content, an encryption machine or an encryption server is called to encrypt the distributed data. When the encrypted data arrives at the large-screen drive server, the encryption machine or the encryption server is called for decryption operation so as to ensure the security and the authenticity of the released content and prevent the released content from being tampered or forged. The purpose of the large screen drive server or large screen drive board is to convert the generic release protocol into a non-generic protocol that can be recognized by the particular large screen device. LED screens and LCD screens of various factories are main bodies of the release system which need to be in butt joint. By the system, the mixed networking of large screens of different manufacturers and different platforms can be realized.
Preferably, as shown in fig. 2-3, each of the large screen driving servers and each of the large screen driving boards includes a core service communication module, a driving service upgrading module, a large screen type detecting module and a plurality of large screen driving modules;
the core service communication module is in charge of carrying out data interaction with the core server, and selecting a large screen driving program range used by the large screen equipment which is currently connected according to an instruction of the core server; reporting basic information (such as online state, brand, model, software version number and the like) and basic state (online state, broadcasting state and the like) of currently connected large-screen equipment to the core server; receiving general program content issued by the core server, and calling a corresponding large screen driving module to perform private program content conversion;
The driving service upgrading module is responsible for managing and updating the large screen driving program, dynamically loading the newly added large screen driving program into the large screen driving module according to the requirement of a user, so that the universal large screen content release system can support new brands and models of large screen equipment or update the large screen device driving program with the existing brands and models without restarting the universal large screen content release system;
The large screen driving module comprises large screen driving programs of various manufacturers and various brands, and covers main stream large screen equipment in the market, so that each large screen driving server can support various large screen equipment simultaneously; the large screen driving module converts the decrypted general program content into private program content which can be identified by currently connected large screen equipment and is responsible for realizing the control and display of different large screen equipment; the user can configure a plurality of large screen driving modules according to actual conditions, so that the large screen driving server can support a plurality of large screen devices at the same time;
The large screen type detection module automatically identifies large screen equipment in a network according to the configuration of the large screen driving module and acquires basic information of the large screen equipment; basic information of the identified large-screen equipment is fed back to the core server through the core service communication module;
and the large screen driving board and the large screen driving server automatically identify and match large screen equipment connected with the large screen driving board and the large screen driving server according to the large screen driving program range configured by the core server.
Preferably, as shown in fig. 3, the large screen driving board further includes a security module, a release content analysis module and a release content display module;
The security module is used for decrypting the general program content issued by the core server and encrypting the information reported to the core server by the large screen driving board, and the encryption and decryption processes are completed in the large screen driving board, so that the security of the whole system is improved. In addition, the module can also receive a key update instruction issued by the core server to update the key of the module, so that the security is further enhanced;
the release content analysis module is used for analyzing the general program content released by the core server into interface information which can be displayed by corresponding large-screen equipment; the general program content is a standardized data format that contains information about the title, content, media assets, location, layout, etc. of the program.
And the release content display module is used for outputting the analyzed interface information to corresponding large-screen equipment for display.
Specifically, the large screen type detection module in the large screen driving board is responsible for automatically matching the brand and model of the large screen equipment mounted under the large screen type detection module and controlling and displaying the large screen equipment, and the specific functions comprise: (1) Automatically identifying and controlling the brand and model of the connected large screen device; (2) Basic information and state of the large screen equipment are reported to a core server; (3) And receiving the general program information issued by the core server, and converting the general program information into a private protocol which can be correctly identified by the large-screen equipment.
The distribution content analysis module is specifically configured to download media resources, such as pictures, video, audio, and the like, in the universal program content. According to the uniform resource locator URL of the media resource, downloading the media resource to the local storage of the large screen driving board in a network request mode so as to facilitate subsequent processing and display;
The release content analysis module is specifically used for generating interface information according to the positions and the layout of various media resources in the general program content; various media resources are rendered onto a virtual canvas by using a graphic library or framework, such as Qt, openGL, etc., to form a complete interface information, and the interface may include various elements, such as text, pictures, video, audio, animation, etc., and interactive effects, such as scrolling, switching, scaling, etc.
The release content display module is specifically configured to convert the content of the virtual canvas into an HDMI signal according to parameters such as resolution, color, frame rate, etc. of the large screen device, so as to transmit the HDMI signal to the corresponding large screen device. The module can send the HDMI signal to the large screen device through the HDMI output interface of the large screen driving board, so that the interface generated by the starting content analysis module is displayed on the large screen device.
It should be noted that, the large screen driving boards are connected with the large screen devices one to one, and the large screen driving server can be connected with a plurality of large screen devices; the large screen driving board is provided with two output interfaces, namely a network and an HDMI, and the large screen driving server is provided with only the network output interface, so that the large screen driving board can support large screens of more types; the large screen driving board is internally provided with a security module, and can select to use encryption service or an own encryption module according to network topology. The network output interface is suitable for being connected with large screens with network protocols, and can generate corresponding display interfaces through the network protocols, the HDMI output interface is suitable for being connected with large screens without network protocols, and program interfaces generated by the large screen drive board can be directly displayed through the HDMI output interface.
Specifically, the large screen driving board can call the encryption module to perform decryption operation, so as to improve security, and can also call the security module to perform decryption operation.
Preferably, the large screen driving board selects a corresponding large screen driving program according to different large screen devices so as to control and display the large screen devices, wherein the principle of the large screen driving board automatically matching the large screen devices is as follows:
The first step, the large screen driving board checks whether the large screen driving program is updated on the core server through the driving service upgrading module, and if so, the large screen driving program is downloaded and updated; the large screen driving board is provided with a large screen driving program queue, and the large screen driving program queue is a set of large screen driving programs which are arranged according to a certain sequence; each driver is a piece of software code specially written for one or more large screen devices, and can enable communication and interaction between the large screen driver board and the large screen devices.
Secondly, the large screen driving board sequentially takes out large screen driving programs from the large screen driving program queue in sequence, wherein the large screen driving programs comprise detection packets which are special data packets, and the detection packets are broadcasted into a local area network to inquire whether large screen equipment exists in the network;
thirdly, after the large screen device receives the detection packet, judging whether to respond according to the private protocol of the large screen device; the private protocol is a rule that specifies how large screen devices recognize and process different types of data packets, which is unique to the make and model of each large screen device. If the large screen device considers that the detection packet is legal, replying a response packet to the source IP address of the detection packet, which is a special data packet used for telling the large screen drive board of the existence of the large screen device; the response packet also contains the IP address of the large-screen device and some basic information, such as the device name, model number, version, etc.
Fourth, the large screen driving board can check whether the received response packet is correct; if the response packet is correct, the current large screen driver is matched with the large screen device, the current large screen driver is solidified, namely the large screen driver is stored in a memory of a large screen driver board, if the communication between the large screen driver board and the connected large screen device is always kept normal, the current large screen driver is not needed to be taken out from the large screen driver queue, and the large screen driver board directly uses the solidified large screen driver to control and display the large screen device; if the communication between the large screen driving board and the connected large screen equipment is abnormal for a certain time, the large screen driving board returns to the second step to restart the detection flow so as to find whether new large screen equipment connected with the large screen driving board exists; if the response packet is incorrect or the response is overtime, the current large screen driver is not matched with the large screen device, the current large screen driver is discarded, then the next large screen driver is taken out of the large screen driver queue, the steps are repeated until a matched large screen driver is found, if all the large screen drivers are not matched with the corresponding large screen device, the large screen driver board is quiesced for a period of time, and then the process returns to the second step to restart the large screen detection process;
The principle of the large screen driving server automatically matching the large screen equipment is similar to that of the large screen driving board, except that the large screen driving server can simultaneously use a plurality of different large screen driving programs to match a plurality of different large screen equipment, and simultaneously, the large screen driving programs corresponding to the different large screen equipment are solidified in the memory of the large screen driving server.
Preferably, as shown in fig. 4, the driver service upgrade module stores the latest version of all the large screen drivers and the latest version of the large screen type detection module, and the large screen type detection module can identify the type of the large screen device with the least resources, and includes specific detection instructions, and the instructions are updated according to the updating of the large screen drivers; the large screen driving program is modularized in the large screen driving server or the driving board and can be installed or uninstalled according to the requirement, so that the space can be saved and the efficiency can be improved;
The upgrade principle of the large screen driving server or the upgrade principle of the large screen driving board is as follows:
when the large screen driving server or the large screen driving board is started, firstly checking whether the large screen type detection module has a new version, and if so, downloading and installing the large screen type detection module;
then, the large screen driving server or the large screen driving board runs the program of the large screen type detection module to determine the type of the current large screen equipment;
then, the large screen type detection module checks whether a large screen driving program of the current large screen equipment type exists in the large screen driving server or the large screen driving board; if yes, comparing whether the version number of the large screen driving program in the large screen driving server or the large screen driving board is consistent with the version number in the driving service upgrading module; if the two types are consistent, no upgrading is needed; and if the driver is inconsistent, downloading and installing the large screen driver of the latest version from the driver service upgrading module.
Preferably, the core server and each large screen driving server adopt a unified MQTT protocol for communication, and the core server and each large screen driving board adopt a unified MQTT protocol for communication.
Preferably, the large screen driving board has a network interface and an HDMI interface, and the large screen driving server has only a network interface.
Preferably, the large screen driving board is an embedded device, is generally installed together with the large screen device, can be directly installed inside the large screen device or hung outside the large screen device (subjected to waterproof treatment), and is installed in a computer of a machine room.
In the embodiment of the invention, the encryption principle of the communication between the systems is as follows:
Introduction and update of certificates
(1) Instruction overview
The security module of the large screen drive board updates or imports the key by communicating with the encryption server of the system. The communication mode is characterized in that the initiator of the communication is always an encryption server of the system. Specifically, the encryption server of the system sends a key import or update instruction to the security module, and the security module returns a processed result to the encryption server after receiving the message. In this process, the security module plays a passive role, and it simply performs corresponding processing according to the instruction of the encryption module, and does not actively initiate communication. This reflective communication ensures the security and reliability of the communication, since only requests issued by the encryption server will be processed by the security module, thereby avoiding unnecessary information leakage and interference. The message body is described below in Table 1-1;
TABLE 1-1 message formats
Message code: the 1 byte indicates the type of message and the message type specification is shown in tables 1-2.
Message length: the 2 bytes represent the actual length of the message data. Information data: actual data interacted between the security module and the encryption server.
TABLE 1-2 message type specification
(2) Message format
A) Taking random number
The security module generates a random number according to the length transmitted by the encryption server, see tables 1-3.
Tables 1-3 random number fetch request
The message data of the security module return message is specified in tables 1-4 below.
Tables 1-4 get random number response
B) External authentication, see tables 1-5 below.
TABLE 1-5 external authentication request
The message data of the security module return message is specified in tables 1-6 below.
Tables 1-6 external authentication response
After the encryption server external authentication is successful, the default key in the module can be updated through the instruction, see tables 1-7;
Tables 1-7 update Key request
The message data of the security module return message is specified in tables 1-8 below.
Tables 1-8 update key responses
D) Importing or updating certificates
After the encryption server external authentication is successful, the certificate list in the security module can be updated through the instruction, as shown in tables 1-9 below.
Tables 1-9 import certificates or update certificate requests
The message data of the security module return message are specified in the following tables 1-10.
Tables 1-10 import certificates or update certificate replies
0X00 indicates success, the other values are errors;
Wherein the root certificate and device CA certificate formats are as follows in tables 1-11:
TABLE 1-11 certificate formats
0X80 x00 to 16 bytes are complemented according to the bit complement rule of PBOC, and the MAC calculation data is as follows: message encoding and message length and certificate type and 32-byte private key ciphertext, and a MAC computing mode refers to PBOC specifications.
Signature and encryption of data
(1) Instruction overview
In data security, signing and encryption are two common techniques, with signing being used primarily to verify the integrity and authenticity of the data, and encryption being used primarily to protect the confidentiality of the data. In the system, signature and encryption are combined, so that more comprehensive data security protection is provided. The confidentiality of the data is guaranteed, and the integrity and the authenticity of the data are guaranteed.
(2) Encryption/decryption process
The system adopts asymmetric encryption, and each certificate comprises a certificate number and a group of public keys and private keys for pairing.
Encryption flow
For a sender (encryptor) of data, firstly, a digest algorithm is used to obtain plaintext data to obtain a digest, and the digest 1 is signed by a private key of a certificate 1 to generate a unique signature value signature1. After adding signature1 and the number of certificate 1 for signing to the plaintext data, it is assumed that the final output result is b. Then, the encryption operation is performed on b using the public key of certificate 2, and the data c is finally generated after adding the certificate number of certificate 2 to the encrypted data.
Decryption flow
For a receiving party (decryption party) of the data, after receiving the data c, searching a private key corresponding to the certificate according to the certificate number of the certificate 2, decrypting the encrypted part by using the private key to obtain data d, then reading a public key and a signature value (signature 1) for signing the certificate in the data d, and performing signature verification operation on the signature1 by using the public key to obtain a summary2. Comparing the summary1 with the summary2, and specifying that the instruction is legal and approving the data content; comparing different instructions to indicate that the instruction is illegal and discarding the data.
(III) data Format
(1) Signature data format
The signed instruction comprises instruction data and signature data, and examples are as follows:
Table 3-1 data signature format
Cmd_data: for instruction part
Signature_length:2 bytes, representing the total length of the signature part
Signature_data (): signature part
The signature part (signature_data) format is as follows:
TABLE 3-2 signature part format
(2) The encrypted data format is as follows:
TABLE 3-3 encryption data format
The general large-screen content release system compatible with different brands and materials provided by the embodiment of the invention has the advantages that the core server is responsible for the functions of user management, media resource auditing, program production, program release and the like, and meanwhile, the safety and the authenticity of release content are ensured. The large screen driving server and the large screen driving board are respectively responsible for realizing control and display of large screen equipment of different brands and models and communication with the core server. The large screen driving server also has the function of automatically discovering equipment, and the large screen driving board also has the functions of automatically matching equipment, analyzing and displaying released content and the like. The invention also introduces the principle of the large screen driving board automatic matching equipment, namely, a proper driving program is found by driving a queue, detecting a packet and responding to the packet.
It is to be understood that the above embodiments are merely illustrative of the application of the principles of the present invention, but not in limitation thereof. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the invention, and are also considered to be within the scope of the invention.
Claims (8)
1. The universal large-screen content release system is characterized by comprising a core server, an encryption module, a plurality of large-screen drive servers, a plurality of large-screen drive boards and a plurality of large-screen devices, wherein each large-screen drive server is connected with one or more large-screen devices, and each large-screen drive board is connected with one large-screen device;
the core server is used for making general program content and auditing the general program content; then, the encryption module is called to encrypt the checked general program content so as to generate encrypted general program content; finally, the encrypted general program content is issued to a large screen driving server or a large screen driving board;
The large screen driving server or the large screen driving board is used for calling the encryption module to decrypt the encrypted general program content, converting the decrypted general program content into private program content which can be identified by different large screen devices, and then sending the private program content to the corresponding large screen devices;
The large screen device is used for displaying corresponding private program content;
each large screen driving server and each large screen driving board comprise a core service communication module, a driving service upgrading module, a large screen type detection module and a plurality of large screen driving modules;
The core service communication module is in charge of carrying out data interaction with the core server, and selecting a large screen driving program range used by the large screen equipment which is currently connected according to an instruction of the core server; the basic information and the basic state of the currently connected large-screen equipment are reported to the core server; receiving general program content issued by the core server, and calling a corresponding large screen driving module to perform private program content conversion;
The driving service upgrading module is responsible for managing and updating the large screen driving program, dynamically loading the newly added large screen driving program into the large screen driving module according to the requirement of a user, so that the universal large screen content release system can support new brands and models of large screen equipment or update the large screen device driving program with the existing brands and models without restarting the universal large screen content release system;
The large screen driving module comprises a plurality of large screen driving programs, so that each large screen driving server can support a plurality of large screen devices at the same time; the large screen driving module converts the decrypted general program content into private program content which can be identified by currently connected large screen equipment and is responsible for realizing the control and display of different large screen equipment;
The large screen type detection module automatically identifies large screen equipment in a network according to the configuration of the large screen driving module and acquires basic information of the large screen equipment; basic information of the identified large-screen equipment is fed back to the core server through the core service communication module;
and the large screen driving board and the large screen driving server automatically identify and match large screen equipment connected with the large screen driving board and the large screen driving server according to the large screen driving program range configured by the core server.
2. The universal large screen content distribution system according to claim 1, wherein the large screen driver board further comprises a security module, a distribution content parsing module, and a distribution content display module;
The security module is used for decrypting the general program content issued by the core server and encrypting the information reported to the core server by the large screen driving board; the key updating instruction issued by the core server can be received so as to update the key of the key updating instruction;
The release content analysis module is used for analyzing the general program content released by the core server into interface information which can be displayed by corresponding large-screen equipment;
and the release content display module is used for outputting the analyzed interface information to corresponding large-screen equipment for display.
3. The universal large screen content distribution system according to claim 2, wherein the distribution content analysis module is specifically configured to download a media resource in the universal program content, and download the media resource to a local storage of the large screen drive board by means of a network request according to a uniform resource locator URL of the media resource, so as to facilitate subsequent processing and display;
The release content analysis module is specifically used for generating interface information according to the positions and the layout of various media resources in the general program content; wherein, using graphic library or frame to render various media resources to a virtual canvas to form a complete interface information;
The release content display module is specifically configured to convert the content of the virtual canvas into an HDMI signal for transmission to a corresponding large screen device.
4. The universal large screen content distribution system according to claim 1, wherein the large screen driving board selects a corresponding large screen driving program according to different large screen devices to realize control and display of the large screen devices, and the principle of the large screen driving board automatically matching the large screen devices is as follows:
The first step, the large screen driving board checks whether the large screen driving program is updated on the core server through the driving service upgrading module, and if so, the large screen driving program is downloaded and updated; the large screen driving board is provided with a large screen driving program queue, and the large screen driving program queue is a set of large screen driving programs which are arranged according to a certain sequence;
Step two, the large screen driving board sequentially takes out large screen driving programs from the large screen driving program queue in sequence, wherein the large screen driving programs comprise detection packets, and the detection packets are broadcasted into a local area network to inquire whether large screen equipment exists in the network;
thirdly, after the large screen device receives the detection packet, judging whether to respond according to the private protocol of the large screen device; if the large screen device considers that the detection packet is legal, replying a response packet to the source IP address of the detection packet so as to tell the large screen drive board of the existence of the large screen device;
Fourth, the large screen driving board can check whether the received response packet is correct; if the response packet is correct, the current large screen driver is matched with the large screen device, the current large screen driver is solidified, namely the large screen driver is stored in a memory of a large screen driver board, if the communication between the large screen driver board and the connected large screen device is always kept normal, the current large screen driver is not needed to be taken out from the large screen driver queue, and the large screen driver board directly uses the solidified large screen driver to control and display the large screen device; if the communication between the large screen driving board and the connected large screen equipment is abnormal for a certain time, the large screen driving board returns to the second step to restart the detection flow so as to find whether new large screen equipment connected with the large screen driving board exists; if the response packet is incorrect or the response is overtime, the current large screen driver is not matched with the large screen device, the current large screen driver is discarded, then the next large screen driver is taken out of the large screen driver queue, the steps are repeated until a matched large screen driver is found, if all the large screen drivers are not matched with the corresponding large screen device, the large screen driver board is quiesced for a period of time, and then the process returns to the second step to restart the large screen detection process;
The principle of the large screen driving server automatically matching the large screen equipment is similar to that of the large screen driving board, except that the large screen driving server can simultaneously use a plurality of different large screen driving programs to match a plurality of different large screen equipment, and simultaneously, the large screen driving programs corresponding to the different large screen equipment are solidified in the memory of the large screen driving server.
5. The universal large screen content distribution system according to claim 1, wherein the driving service upgrade module stores the latest version of all large screen driving programs and the latest version of a large screen type detection module, wherein an upgrade principle of the large screen driving server or an upgrade principle of the large screen driving board is as follows:
when the large screen driving server or the large screen driving board is started, firstly checking whether the large screen type detection module has a new version, and if so, downloading and installing the large screen type detection module;
then, the large screen driving server or the large screen driving board runs the program of the large screen type detection module to determine the type of the current large screen equipment;
then, the large screen type detection module checks whether a large screen driving program of the current large screen equipment type exists in the large screen driving server or the large screen driving board; if yes, comparing whether the version number of the large screen driving program in the large screen driving server or the large screen driving board is consistent with the version number in the driving service upgrading module; if the two types are consistent, no upgrading is needed; and if the driver is inconsistent, downloading and installing the large screen driver of the latest version from the driver service upgrading module.
6. The universal large screen content distribution system according to claim 1, wherein the core server communicates with each of the large screen drive servers using a unified MQTT protocol, and the core server communicates with each of the large screen drive boards using a unified MQTT protocol.
7. The universal large screen content distribution system according to claim 1, wherein the large screen drive board has a network interface and an HDMI interface, and the large screen drive server has only a network interface.
8. The universal large screen content distribution system according to claim 1, wherein the large screen driving board is directly installed inside the large screen device or externally hung outside the large screen device, and the large screen driving server is installed in a computer of the machine room.
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| CN110557674A (en) * | 2018-05-30 | 2019-12-10 | 环球天成科技(北京)有限公司 | Intelligent screen projection playing and transmitting method and device |
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| CN110557674A (en) * | 2018-05-30 | 2019-12-10 | 环球天成科技(北京)有限公司 | Intelligent screen projection playing and transmitting method and device |
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