Multimedia transmission method based on priority and security auditing

Abstract

The invention provides a multimedia transmission method based on priority and security auditing. The multimedia transmission method comprises the steps that a second multimedia terminal initiates a multimedia transmission session application to a first multimedia terminal; the first multimedia terminal senses the network topology and selects a content security auditing service according to the session application; calculating a transmission path transmitted from the first multimedia terminal to the second multimedia terminal; the first multimedia terminal generates a flow table rule according to the transmission path and the network topology, and sends the flow table rule to the communication equipment; the first multimedia terminal performs priority distribution on the multimedia information to be transmitted by adopting a priority weight distribution strategy; transmitting the multimedia information with the allocated priority to a second multimedia terminal through the communication equipment; the second multimedia terminal carries out fusion display on the multimedia data sent by the first multimedia terminal; according to the invention, the multimedia data are transmitted according to different priorities, and the data with high real-time requirements are transmitted preferentially, so that the lagging or delay caused by network congestion can be avoided.

Description

Technical Field

[0001] This invention belongs to the field of multimedia technology, specifically relating to a multimedia transmission method based on priority and security audit. Background Technology

[0002] Multimedia technology refers to a comprehensive information form that integrates, processes, and interactively presents multiple information carriers through digital technology. Its core lies in multimodal information fusion and human-computer interaction, breaking through the limitations of traditional single media. This patent primarily targets the transmission of text, audio, and video media data. Network topology sensing technology is a key technology that uses active detection and passive monitoring to acquire and dynamically map nodes, links, and their connections in a network in real time. Its core lies in constructing a real-time, accurate, and scalable network topology view, providing fundamental data support for route optimization, fault location, and resource scheduling. Currently, mainstream technologies include SNMP, etc.

[0003] The OpenFlow protocol is a core protocol for software-defined networking, used to decouple the network control layer from the data layer. Its core mechanism guides data forwarding through flow tables. Switches match data packets based on the matching fields of flow table entries and execute preset actions.

[0004] Multimedia technology has now been deeply integrated into various industries, exhibiting a dual-driven characteristic of "scenario-based + intelligent" integration. In mainstream cloud scenarios, the communication link for multimedia data from the cloud to the end is mature and can well meet multimedia interaction needs. However, in end-to-end application scenarios, problems such as a lack of multimedia security control measures and poor multimedia interaction quality have emerged. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention proposes a multimedia transmission method based on priority and security auditing. The method includes: constructing a multimedia communication network, which includes multimedia terminals, a content security auditing service, and communication equipment; the multimedia terminals sensing the network topology, calculating and generating transmission paths to the destination multimedia terminals, and sending and receiving multimedia data; the content security auditing service being distributed and deployed in the communication network, and configured with large-capacity storage devices as needed, and performing security auditing on the multimedia data according to the configuration policy; and the communication equipment responding to the reporting requests from the multimedia terminals, providing network topology data to the multimedia terminals, and supporting the transmission of multimedia data according to different priorities; specifically including:

[0006] The second multimedia terminal initiates a multimedia transmission session request to the first multimedia terminal;

[0007] The first multimedia terminal senses the network topology and selects a content security audit service based on the session request;

[0008] The system calculates the transmission path for transmitting content security auditing services from the first multimedia terminal to the second multimedia terminal; the first multimedia terminal generates flow table rules based on the transmission path and network topology, and sends the flow table rules to the communication device via the OpenFlow protocol;

[0009] The first multimedia terminal uses a priority weight allocation strategy to prioritize the multimedia information to be transmitted; and transmits the prioritized multimedia information to the second multimedia terminal through a communication device.

[0010] The second multimedia terminal integrates and displays the multimedia data sent by the first multimedia terminal.

[0011] The beneficial effects of this invention are:

[0012] On the one hand, this invention uses centralized control to schedule multimedia data to the content security audit service on demand, which can effectively identify harmful information such as tampering and errors, improve content quality, and enhance user trust. On the other hand, multimedia data is transmitted according to different priorities, with data with high real-time requirements (such as video conference audio and remote surgical instructions) being transmitted first, which can avoid lag or delay caused by network congestion. Attached Figure Description

[0013] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a diagram illustrating the multimedia differentiated transmission steps provided in some embodiments of the present invention;

[0015] Figure 2 These are schematic diagrams of network topologies provided in some embodiments of the present invention;

[0016] Figure 3 This is a priority transmission diagram provided by some embodiments of the present invention. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] A multimedia transmission method based on priority and security auditing is disclosed. The method includes: constructing a multimedia communication network, which includes multimedia terminals, a content security auditing service, and communication equipment; the multimedia terminals sensing the network topology, calculating and generating transmission paths to destination multimedia terminals, and sending and receiving multimedia data; the content security auditing service being distributed and deployed in the communication network, and configured with large-capacity storage devices as needed, and performing security auditing on multimedia data according to the configured policies; and the communication equipment responding to reporting requests from multimedia terminals, providing network topology data to the multimedia terminals, and supporting the transmission of multimedia data according to different priorities.

[0019] like Figure 1 This is a diagram illustrating the multimedia differentiated transmission steps provided in some embodiments of the present invention. The multimedia differentiated transmission steps are as follows:

[0020] S101. The initiator of the multimedia terminal (hereinafter referred to as the client) initiates a multimedia transmission session request to the multimedia terminal (hereinafter referred to as the server) that records or publishes the service. The request includes the requested multimedia content, the name of the content security audit service, and the security service level.

[0021] S102. The server is aware of the network topology and selects the content security audit service based on the content security audit service name in the session request. Since there are usually multiple services in a communication network, different service names represent different user management or different locations or management domains. This step selects the appropriate content security audit service according to the client's requirements. After selection, the location and IP of the content security audit service are fixed.

[0022] S103. The server calculates and generates the transmission path to the client. The server generates flow table rules based on the transmission path and network topology, and sends the flow table rules to the communication device through the OpenFlow protocol.

[0023] S104. The server adopts a priority weight allocation strategy, which will configure different service types with different priorities according to audio, video and text media data, and send them to the client.

[0024] S105. The client integrates and displays the multimedia data sent by the server.

[0025] In this embodiment, sending flow table rules to the communication device via the OpenFlow protocol includes: the communication device identifying the flow table sent by the multimedia terminal and loading it into the forwarding table. The forwarding table contains service type priorities. The communication device identifies the received communication data and processes the different service type priorities of the communication data by matching them with the forwarding table.

[0026] In this embodiment, the content security audit service is loaded with audit policies of different security service levels. When the media data sent by the multimedia terminal fails the audit, an audit failure message is returned to both the multimedia terminal that sent and received the data. The content security audit service supports data storage. By manually configuring and enabling the save function, the content security audit service will save the audited multimedia data.

[0027] The transmission path includes the transmission path from the first multimedia terminal to the content security audit service and the transmission path from the content security audit service to the second multimedia terminal. The transmission path calculation uses an improved Dijkstra algorithm, based on media service assurance requirements, service priorities, and network topology, to calculate the shortest communication path, the path with the lowest latency, and the path with the widest bandwidth from the first multimedia terminal to the content security audit service; it also calculates the shortest communication path, the path with the lowest latency, and the path with the widest bandwidth from the content security audit service to the second multimedia terminal. The path includes bandwidth, latency, and jitter information. Media service assurance requirements include bandwidth, latency, and jitter. For high-priority services, the transmission path with the lowest latency is selected first. The multimedia terminal senses the network topology in real time and recalculates the path when the available bandwidth of the transmission path is less than the service requirements.

[0028] The improved Dijkstra algorithm normalizes the distance, reciprocal of latency, and bandwidth metrics, and then uses the normalized data to calculate edge weights, generating different paths. Specifically, it includes: defining a network structure containing a source node, an endpoint, and intermediate nodes; labeling each edge with three attributes: communication distance, latency, and bandwidth; obtaining the path between the source node and the endpoint, and calculating the sum of the distances of all edges in the path; sorting the calculated sums of edge distances in ascending order; and updating if the distance from the source node to the current node + the distance of the current edge is less than the known minimum distance from the source node to its adjacent nodes. The calculation process for the path with the lowest latency and the path with the widest bandwidth is the same as the calculation process for the shortest communication path.

[0029] The content security audit service will maintain heartbeat interaction with the communication device and register with the communication device through encryption. After registration, the communication device will broadcast the content security audit service information to the entire communication network. The content security audit service information includes the content security audit service IP address and content security audit service name.

[0030] like Figure 2This is a network topology diagram provided in some embodiments of the present invention. The diagram includes communication devices R1, R2, R3, R4, R5, and R6, a content security audit service, multimedia terminal 1, and multimedia terminal 2. The content security audit service is connected to R3 via a TSN link, and R3 is connected to R5 via a TSN link. The devices at both ends of the TSN link synchronize their clocks and perform gated transmission of network data, effectively reducing data queuing time. The data transmission time from the content security audit service to R3 to R5 is relatively short. The content security audit service is connected to R6 via a high-bandwidth link, and R6 is connected to R5 via a high-bandwidth link. While the high-bandwidth link has a wide network transmission capacity, it does not employ TSN technology and lacks a time-based unified gating scheduling strategy. Therefore, its data transmission latency is not fixed and it is easily affected by multimedia data queuing, increasing data transmission time.

[0031] like Figure 3 This is a priority transmission diagram provided by some embodiments of the present invention. In the diagram, multimedia terminal 1 provides multimedia services to multimedia terminal 2. All multimedia service data of multimedia terminal 1 undergoes security auditing through a content security auditing service. The highest priority configuration for text services of multimedia terminal 1 is 6, the highest priority configuration for audio services is 5, and the highest priority configuration for video services is 4.

[0032] Figure 3 In the process, multimedia terminal 1 senses the network topology and calculates the shortest communication path, the path with the lowest latency, and the path with the widest bandwidth from multimedia terminal 1 to the content security audit service, as well as the shortest communication path, the path with the lowest latency, and the path with the widest bandwidth from the content security audit service to multimedia terminal 2.

[0033] The text service of multimedia terminal 1 selects the path with the lowest latency, specifically: Multimedia terminal 1 -> R1 -> Content Security Audit Service -> R3 -> R5 -> Multimedia terminal 2. Multimedia terminal 1 generates flow table rules and sends them to the communication equipment and the Content Security Audit Service. Specifically, the flow table for R1 has the following rules: destination address is multimedia terminal 2, service type is text, and next hop is the Content Security Audit Service; the flow table for the Content Security Audit Service has the following rules: destination address is multimedia terminal 2, service type is text, and next hop is R3; the flow table for R3 has the following rules: destination address is multimedia terminal 2, service type is text, and next hop is R5; the flow table for R5 has the following rules: destination address is multimedia terminal 2, service type is text, and next hop is multimedia terminal 2.

[0034] The main reason for choosing the path with the lowest latency for text services is that text services contain instruction tasks and have high requirements for rapid synchronization in automated and highly collaborative scenarios. Time guarantees are needed for transmission, so the path with the lowest link transmission latency is preferred during communication.

[0035] The video and audio services of Multimedia Terminal 1 select the widest bandwidth path, specifically: Multimedia Terminal 1 -> R1 -> Content Security Audit Service -> R3 -> R5 -> Multimedia Terminal 2. Multimedia Terminal 1 generates flow table rules and distributes them to the communication equipment and the Content Security Audit Service. Specifically, the flow table for R1 has the following destination address: Multimedia Terminal 2; service type: video or audio service; next hop: Content Security Audit Service; the flow table for the Content Security Audit Service has the following destination address: Multimedia Terminal 2; service type: video or audio service; next hop: R6; the flow table for R6 has the following destination address: Multimedia Terminal 2; service type: video or audio service; next hop: R5; the flow table for R5 has the following destination address: Multimedia Terminal 2; service type: video or audio service; next hop: Multimedia Terminal 2.

[0036] The main reason for choosing the widest bandwidth path for both video and audio services is that these services involve rich communication content, large data volumes, and high bandwidth consumption. Therefore, using a high-bandwidth link can effectively reduce data transmission time and facilitate service interaction. In special scenarios where the network is unstable or unreliable, different priorities are configured for audio and video services to prevent issues such as the loss of critical audio data caused by video services being transmitted first.

[0037] The above-described embodiments further illustrate the purpose, technical solution, and advantages of the present invention. It should be understood that the above-described embodiments are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made to the present invention within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multimedia transmission method based on priority and security auditing, characterized in that, include: Construct a multimedia communication network, which includes multimedia terminals, content security auditing services, and communication equipment; The second multimedia terminal initiates a multimedia transmission session request to the first multimedia terminal; The first multimedia terminal senses the network topology and selects a content security audit service based on the session request; The system calculates the transmission path for transmitting content security auditing services from the first multimedia terminal to the second multimedia terminal; the first multimedia terminal generates flow table rules based on the transmission path and network topology, and sends the flow table rules to the communication device via the OpenFlow protocol; The first multimedia terminal uses a priority weight allocation strategy to prioritize the multimedia information to be transmitted; and transmits the prioritized multimedia information to the second multimedia terminal through a communication device. The second multimedia terminal integrates and displays the multimedia data sent by the first multimedia terminal.

2. The multimedia transmission method based on priority and security auditing according to claim 1, characterized in that, The session request includes the requested multimedia content, the name of the content security audit, and the security service level.

3. The multimedia transmission method based on priority and security auditing according to claim 1, characterized in that, The content security auditing service is deployed in the multimedia communication network and configured with storage devices. The content security auditing service performs security audits on multimedia data according to the configured policies.

4. The multimedia transmission method based on priority and security auditing according to claim 3, characterized in that, The security audit of multimedia data according to the configuration policy includes: the content security audit service loads audit policies of different security service levels. When the media data sent by the multimedia terminal fails the audit, an audit failure message is returned to both the multimedia terminal that sent the data and the multimedia terminal that received the data; the content security audit service supports data storage. If the save function is manually configured to be enabled, the content security audit service will save the audited multimedia data.

5. A multimedia transmission method based on priority and security auditing according to claim 4, characterized in that, The audit strategies for different security service levels include basic security level, enhanced security level, and advanced security level.

6. A multimedia transmission method based on priority and security auditing according to claim 3, characterized in that, The content security audit service interacts with the communication device via heartbeat and registers with the communication device through encryption. After registration, the communication device will broadcast the content security audit service information to the entire communication network. The content security audit service information includes the content security audit service IP address and content security audit service name.

7. A multimedia transmission method based on priority and security auditing according to claim 1, characterized in that, The transmission paths include: the transmission path from the first multimedia terminal to the content security audit service, and the transmission path from the content security audit service to the second multimedia terminal; the improved Dijkstra algorithm is used to calculate the shortest communication path, the path with the lowest latency, and the path with the widest bandwidth from the first multimedia terminal to the content security audit service; the shortest communication path, the path with the lowest latency, and the path with the widest bandwidth from the content security audit service to the second multimedia terminal are also calculated; the paths include bandwidth, latency, and jitter information; media service guarantee requirements include bandwidth, latency, and jitter; the transmission path for high-priority services prioritizes the path with the lowest latency; the multimedia terminal perceives the network topology in real time, and recalculates the path when the available bandwidth of the transmission path is less than the service requirements.

8. A multimedia transmission method based on priority and security auditing according to claim 7, characterized in that, The improved Dijkstra algorithm normalizes the distance, reciprocal of the delay, and bandwidth metrics, and then uses the normalized data to calculate the edge weights in Dijkstra's algorithm to generate different paths.

9. A multimedia transmission method based on priority and security auditing according to claim 1, characterized in that, The priority and weight allocation strategy includes prioritizing text services over audio services, and prioritizing audio services over video services.

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