CN114679562A - Data transmission system and method for multi-platform video conference - Google Patents
Data transmission system and method for multi-platform video conference Download PDFInfo
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- CN114679562A CN114679562A CN202210225444.XA CN202210225444A CN114679562A CN 114679562 A CN114679562 A CN 114679562A CN 202210225444 A CN202210225444 A CN 202210225444A CN 114679562 A CN114679562 A CN 114679562A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/15—Conference systems
- H04N7/155—Conference systems involving storage of or access to video conference sessions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/74—Address processing for routing
Abstract
The invention discloses a data transmission system and a data transmission method for a multi-platform video conference, and relates to the technical field of instant messaging. The instant messaging server receives video transmission responses of a plurality of destination terminals aiming at the video transmission request; determining the transmission sequence of the target terminal and the main target terminal according to the second data type; determining a transmission path from a source terminal to a destination terminal and a data processing node according to a transmission sequence, a network topology diagram of a transmission network and transmission time delay among a plurality of transmission nodes; the source terminal sends video data to the main target terminal according to the video transmission response of the main target terminal; and the data processing node sends the video data to the corresponding destination terminal according to the video transmission response and the routing table of the corresponding destination terminal. Through the steps, the video data can be processed in a distributed mode, the video data of the terminal corresponding to each data processing node are processed through the data processing nodes, delay of a data transmission system is reduced, and the utilization rate of the whole network resources is improved.
Description
Technical Field
The invention relates to the technical field of instant messaging, in particular to a data transmission system and a data transmission method for a multi-platform video conference.
Background
The WebRTC (Web Real-Time Communication) protocol is one of the most mainstream protocols in the field of internet voice or video, the best cross-browser support capability and the strongest Real-Time property. Multi-platform video conferencing can be achieved by using SFU (Selective Forwarding Unit) and WebRTC technology.
In the prior art, the SFU is used as a media stream router to receive video data of a terminal and forward the video data to other terminals as required. All video data need to be processed by SFU and then forwarded to corresponding terminals, which may result in excessive delay of data transmission system and low utilization rate of overall network resources when the video data is too large.
Disclosure of Invention
The present invention is directed to solve the above problems of the background art, and provides a data transmission system and method for a multi-platform video conference.
In a first aspect of the embodiments of the present invention, a data transmission system for a multi-platform video conference is provided first, where a transmission network in which the system is located includes an instant messaging server, a plurality of terminals, and a plurality of transmission nodes; wherein:
the source terminal is used for sending a video transmission request to the instant messaging server; the source terminal is any one of a plurality of terminals; the video transmission request comprises a source IP address of the source terminal and a first data type of the transmitted video;
The instant communication server is used for forwarding the video transmission request to a plurality of destination terminals; each destination terminal is any one terminal except the source terminal in the plurality of terminals;
each destination terminal is used for sending a video transmission response to the instant messaging server according to the video transmission request; the video transmission response comprises a destination IP address of the destination terminal and a second data type of the video requested to be transmitted by the destination terminal;
the instant messaging server is also used for determining the transmission sequence of each destination terminal according to the second data type of each destination terminal and taking the first transmission sequence as the main destination terminal; determining a transmission path from the source terminal to each destination terminal and a data processing node corresponding to each destination terminal according to the transmission sequence, a pre-stored network topology of the transmission network and the current transmission delay among a plurality of transmission nodes; each data processing node is any one of a plurality of transmission nodes; sending a video transmission response of the main and target terminals to the source terminal; sending a video transmission response and a routing table of a destination terminal corresponding to the data node to each data processing node;
The source terminal is further configured to send the video data of the first data type to the primary destination terminal;
each data processing node is used for sending video data of a second data type corresponding to a destination terminal to the destination terminal corresponding to the data node according to a video transmission response and a routing table when the video data passes through the data processing node;
each destination terminal is used for receiving the video data of the second data type corresponding to the destination terminal and playing the video data.
In a second aspect of the embodiments of the present invention, a data transmission method for a multi-platform video conference is further provided, where the method is applied to an instant messaging server; the transmission network where the instant messaging server is located is composed of the instant messaging server, a plurality of terminals and a plurality of transmission nodes;
the method comprises the following steps:
receiving video transmission responses of a plurality of destination terminals aiming at the video transmission request of the source terminal; the source terminal is any one of a plurality of terminals of the transmission network, and the destination terminal is a terminal except the source terminal in the plurality of terminals of the transmission network; the video transmission request comprises a source IP address of the source terminal and a first data type of the transmitted video; the video transmission response of each destination terminal comprises a destination IP address of the destination terminal and a second data type of the video requested to be transmitted by the destination terminal;
Determining the transmission sequence of each destination terminal according to the second data type of each destination terminal, and taking the first transmission sequence as a main destination terminal;
determining a transmission path from the source terminal to each destination terminal and a data processing node corresponding to each destination terminal according to the transmission sequence, a pre-stored network topology of the transmission network and the current transmission time delay among the plurality of transmission nodes;
sending the video transmission response of the main and target terminals to the source terminal; so that the source terminal sends the video data of the first data type to the main destination terminal;
sending a video transmission response and a routing table of a destination terminal corresponding to the data node to each data processing node; when the video data passes through the data processing node, sending the video data of the second data type corresponding to the destination terminal corresponding to the data node according to the video transmission response and the routing table.
Optionally, the video data of the first data type is a video data packet containing multiple video layers; each video layer has a unique port number; the video data of the second data type is a video data packet of at least one video layer selected from the video data of the first data type;
Determining the transmission sequence of each destination terminal according to the second data type of each destination terminal, and taking the first transmission sequence as a main destination terminal, wherein the method comprises the following steps:
determining the number of video layers of the second data type of each destination terminal, and determining the transmission sequence of each destination terminal according to the sequence from the large number of the video layers to the small number of the video layers;
when the number of the video layers of the second data type of a plurality of destination terminals is the same, randomly sequencing the destination terminals;
and the terminal with the first transmission sequence as a main target.
Optionally, determining, according to the transmission sequence, a pre-stored network topology of the transmission network, and a current transmission delay between a plurality of transmission nodes, a transmission path from the source terminal to each destination terminal and a data processing node corresponding to each destination terminal, includes:
determining a transmission path with the minimum time delay from the source terminal to the main destination terminal as a main path according to a pre-stored network topological graph of the transmission network and the current transmission time delay between a plurality of transmission nodes;
determining a transmission node of a transmission path with the minimum time delay to a second destination terminal from each node on the main path, wherein the transmission node is used as a data processing node of the second destination terminal, and the transmission path is used as a branch path; the second destination terminal is a next destination terminal of the main destination terminal determined according to the transmission order;
And determining a transmission path and a data processing node of a next destination terminal of the destination terminal from each node of the branch path of the destination terminal according to the transmission sequence.
The third aspect of the embodiment of the present invention further provides a data transmission method for a multi-platform video conference, where the method is applied to a terminal, and a transmission network where the terminal is located is composed of an instant messaging server, multiple terminals, and multiple transmission nodes;
the method comprises the following steps:
sending a video transmission request to the instant messaging server; so that the instant messaging server forwards the video transmission request to a plurality of other terminals and receives video transmission responses of the plurality of other terminals to the video transmission request; the video transmission request comprises a source IP address of the terminal and a first data type of the transmitted video; the video transmission response of each other terminal comprises the destination IP address of the other terminal and a second data type of the video data requested to be transmitted by the other terminal; determining the transmission sequence of each other terminal according to the second data type of each other terminal, and taking the first transmission sequence as a main target terminal; determining a transmission path from the terminal to each other terminal and a data processing node corresponding to each other terminal according to the transmission sequence, a pre-stored network topology of the transmission network and the current transmission delay among the plurality of transmission nodes; the transmission network is composed of a plurality of terminals and a plurality of transmission nodes; sending the video transmission response of the main target terminal to the terminal; sending video transmission response and routing table of other terminals corresponding to the data node to each data processing node;
Receiving a video transmission response of the main target terminal, and sending the video data of the first data type to the main target terminal; when the video data passes through the data processing node, the video data of the second data type corresponding to the other terminal is sent to the other terminal corresponding to the data node.
Optionally, the video data of the first data type is a video data packet containing multiple video layers; each video layer has a unique port number; the video data of the second data type is a video data packet of at least one video layer selected from the video data of the first data type, the method further comprising:
receiving video transmission requests of other terminals forwarded by the instant messaging server;
sending a video transmission response aiming at the video transmission request to an instant messaging server according to the terminal hardware attribute;
and receiving the video data sent by the corresponding data processing node and playing the video data.
In a fourth aspect of the embodiments of the present invention, a data transmission method for a multi-platform video conference is further provided, where the method is applied to a data processing node; the transmission network where the data processing node is located is composed of an instant messaging server, a plurality of terminals and a plurality of transmission nodes; the data processing node is any one of a plurality of transmission nodes;
The method comprises the following steps:
receiving a routing table sent by an instant messaging server and a video transmission response of a first destination terminal;
the routing table records routing information of a first destination terminal and a second destination terminal;
receiving first video data which are sent by a transmission node or a terminal and aim at the second destination terminal, and sending the first video data to the second destination terminal according to the routing table;
generating second video data aiming at the first destination terminal according to the video transmission response of the first destination terminal and the first video data;
and sending the second video data to the first destination terminal according to the routing table.
The data transmission system of the multi-platform video conference provided by the embodiment of the invention comprises an instant messaging server, a plurality of terminals and a plurality of transmission nodes; wherein: the source terminal is used for sending a video transmission request to the instant messaging server; the source terminal is any one of a plurality of terminals; the video transmission request comprises a source IP address of a source terminal and a first data type of the transmitted video; the instant communication server is used for forwarding the video transmission request to a plurality of destination terminals; each destination terminal is any one terminal except the source terminal in the plurality of terminals; each destination terminal is used for sending a video transmission response to the instant messaging server according to the video transmission request; the video transmission response comprises the destination IP address of the destination terminal and a second data type of the video requested to be transmitted by the destination terminal; the instant messaging server is also used for determining the transmission sequence of each destination terminal according to the second data type of each destination terminal and taking the first transmission sequence as the main destination terminal; determining a transmission path from a source terminal to each destination terminal and a data processing node corresponding to each destination terminal according to a transmission sequence, a pre-stored network topological graph of a transmission network and current transmission time delay among a plurality of transmission nodes; each data processing node is any one of a plurality of transmission nodes; sending a video transmission response of the main and target terminals to the source terminal; sending a video transmission response and a routing table of a destination terminal corresponding to the data node to each data processing node; the source terminal is also used for sending video data of a first data type to the main target terminal; each data processing node is used for sending video data of a second data type corresponding to a destination terminal to the destination terminal corresponding to the data node according to a video transmission response and a routing table when the video data passes through the data processing node; each destination terminal is used for receiving the video data of the second data type corresponding to the destination terminal and playing the video data. The system can perform distributed processing on the video data, and the video data of the terminal corresponding to each data processing node is processed by the plurality of data processing nodes, so that the delay of a data transmission system is reduced, and the utilization rate of the whole network resources is improved.
Drawings
The invention is further described below with reference to the accompanying drawings.
Fig. 1 is an architecture diagram of a transmission network according to an embodiment of the present invention;
fig. 2 is a flowchart of a data transmission method for a multi-platform video conference according to an embodiment of the present invention;
fig. 3 is a flowchart of a data transmission method for a multi-platform video conference according to an embodiment of the present invention;
fig. 4 is a flowchart of a data transmission method for a multi-platform video conference according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is an architecture diagram of a transmission network according to an embodiment of the present invention, where the transmission network includes an instant messaging server 101, a plurality of terminals (including a terminal 1021, a terminal 1022, a terminal 1023, a terminal 1024, and a terminal 1025), and a plurality of transmission nodes (including a transmission node 1031, a transmission node 1032, a transmission node 1033, a transmission node 1034, and a transmission node 1025). The embodiment of the present invention is described by taking 5 terminals and 5 transmission nodes as an example, and is not limited to this.
Correspondingly, the data transmission system for a multi-platform video conference provided by the embodiment of the invention may include: an instant messaging server 101, a source terminal (the source terminal is any one of the plurality of terminals), a destination terminal (each destination terminal is any one of the plurality of terminals except the source terminal), and a data processing node (each data processing node is any one of the plurality of transmission nodes).
The source terminal is used for sending a video transmission request to the instant messaging server; the video transmission request comprises a source IP address of a source terminal and a first data type of the transmitted video;
an instant messaging server 101, configured to forward a video transmission request to a plurality of destination terminals;
each destination terminal is used for sending a video transmission response to the instant messaging server according to the video transmission request; the video transmission response comprises the destination IP address of the destination terminal and a second data type of the video requested to be transmitted by the destination terminal;
the instant messaging server 101 is further configured to determine a transmission sequence of each destination terminal according to the second data type of each destination terminal, and use the first transmission sequence as a primary destination terminal; determining a transmission path from a source terminal to each destination terminal and a data processing node corresponding to each destination terminal according to a transmission sequence, a pre-stored network topological graph of a transmission network and current transmission time delay among a plurality of transmission nodes; sending a video transmission response of the main and target terminals to the source terminal; sending a video transmission response and a routing table of a destination terminal corresponding to the data node to each data processing node;
The source terminal is also used for sending video data of a first data type to the main target terminal;
each data processing node is used for sending video data of a second data type corresponding to a destination terminal to the destination terminal corresponding to the data node according to a video transmission response and a routing table when the video data passes through the data processing node;
each destination terminal is used for receiving the video data of the second data type corresponding to the destination terminal and playing the video data.
Based on the data transmission system of the multi-platform video conference provided by the embodiment of the invention, video data can be processed in a distributed manner, and the video data of the terminal corresponding to each data processing node is processed by a plurality of data processing nodes, so that the delay of the data transmission system is reduced, and the utilization rate of the whole network resources is improved.
Based on the same inventive concept, the embodiment of the invention provides a data transmission method of a multi-platform video conference, which is applied to an instant messaging server. Referring to fig. 2, fig. 2 is a flowchart of a data transmission method for a multi-platform video conference according to an embodiment of the present invention. The method may comprise the steps of:
s201, receiving video transmission responses of a plurality of destination terminals aiming at the video transmission request of the source terminal.
S202, according to the second data type of each destination terminal, determining the transmission sequence of each destination terminal, and taking the first transmission sequence as the main destination terminal.
And S203, determining transmission paths from the source terminal to each destination terminal and data processing nodes corresponding to each destination terminal according to the transmission sequence, the pre-stored network topology of the transmission network and the current transmission time delay among the plurality of transmission nodes.
S204, sending the video transmission response of the primary terminal to the source terminal so that the source terminal sends the video data of the first data type to the primary terminal.
And S205, sending the video transmission response and the routing table of the destination terminal corresponding to the data node to each data processing node, so that when the video data passes through the data processing node, the data processing node sends the video data of the second data type corresponding to the destination terminal corresponding to the data node according to the video transmission response and the routing table.
The video transmission request comprises a source IP address of a source terminal and a first data type of the transmitted video; the video transmission response of each destination terminal includes a destination IP address of the destination terminal and a second data type of the video requested to be transmitted by the destination terminal.
Based on the data transmission method of the multi-platform video conference provided by the embodiment of the invention, video data can be processed in a distributed manner, and the video data of the terminal corresponding to each data processing node is processed by a plurality of data processing nodes, so that the delay of a data transmission system is reduced, and the utilization rate of the whole network resources is improved.
In one implementation, the instant messaging server may contain a WebRTC signaling server, an SDN controller, and a path planning module. The WebRTC signaling server can be used for performing data communication with the terminal to acquire the video transmission request and the video transmission response. The SDN controller may be configured to communicate data with data transmission nodes (which may be SDN nodes) and obtain current transmission delays from the plurality of transmission nodes. The path planning module may obtain the second data type of each destination terminal from the WebRTC signaling server, determine a transmission sequence of each destination terminal, and use the terminal with the first transmission sequence as a primary destination. The path planning module may further obtain current transmission delays of the plurality of transmission nodes from the SDN controller. The path planning module may also determine a transmission path from the source terminal to each destination terminal and a data processing node corresponding to each destination terminal according to the transmission sequence, a pre-stored network topology of the transmission network, and the current transmission delay between the plurality of transmission nodes.
In one embodiment, the video data of the first data type is a video data packet containing multiple video layers; each video layer has a unique port number; the video data of the second data type is a video data packet of at least one video layer selected from the video data of the first data type;
step S202 includes:
step one, determining the layer number of the video layer of the second data type of each destination terminal, and determining the transmission sequence of each destination terminal according to the sequence of the layer numbers of the video layers from large to small.
And step two, when the number of the video layers of the second data type of a plurality of destination terminals is the same, randomly sequencing the destination terminals.
And step three, taking the first transmission sequence as a main target terminal.
In one implementation, the source terminal may generate video data of the first data type using scalable VP9 video coding. Each frame of the video data may include a plurality of video layers, each having a unique port number, and the destination terminal may select a video layer rate-adapted to the destination terminal according to the port number.
In one embodiment, step S203 comprises:
step one, determining a transmission path with the minimum time delay from a source terminal to a main destination terminal as a main path according to a pre-stored network topological graph of a transmission network and the current transmission time delay between a plurality of transmission nodes.
Step two, determining a transmission node of a transmission path with the minimum time delay from each node on the main path to the second destination terminal as a data processing node of the second destination terminal, wherein the transmission path is used as a branch path;
and step three, determining a transmission path and a data processing node of a next destination terminal of the destination terminal from each node of the branch path of the destination terminal according to the transmission sequence.
The second destination terminal is a next destination terminal to the primary destination terminal determined according to the transmission order.
Based on the same inventive concept, the embodiment of the invention provides a data transmission method of a multi-platform video conference, and the method is applied to a terminal. Referring to fig. 3, fig. 3 is a flowchart of a data transmission method for a multi-platform video conference according to an embodiment of the present invention. The method may comprise the steps of:
s301, sending a video transmission request to an instant messaging server, so that the instant messaging server forwards the video transmission request to a plurality of other terminals, receiving video transmission responses of the other terminals to the video transmission request, determining a transmission sequence of each other terminal according to a second data type of each other terminal, taking the terminal with the first transmission sequence as a main target, determining a transmission path from the terminal to each other terminal and a data processing node corresponding to each other terminal according to the transmission sequence, a pre-stored network topology diagram of a transmission network and current transmission delay among the plurality of transmission nodes, sending the video transmission response of the main target terminal to the terminal, and sending the video transmission response and the routing table of the other terminal corresponding to the data node to each data processing node.
S302, receiving a video transmission response of the primary and destination terminals, and sending video data of a first data type to the primary and destination terminals, so that when the video data passes through a data processing node, the data processing node sends video data of a second data type corresponding to the other terminal corresponding to the data node.
The video transmission request comprises a source IP address of the terminal and a first data type of the transmitted video; the video transmission response of each other terminal includes the destination IP address of the other terminal and the second data type of the video data requested to be transmitted by the other terminal.
Based on the data transmission method of the multi-platform video conference provided by the embodiment of the invention, video data can be processed in a distributed manner, and the video data of the terminal corresponding to each data processing node is processed by a plurality of data processing nodes, so that the delay of a data transmission system is reduced, and the utilization rate of the whole network resources is improved.
In one implementation, the operation of the instant messaging server in steps S301-S302 can refer to the description of steps S201-S205 above.
In one embodiment, the video data of the first data type is a video data packet containing multiple video layers; each video layer has a unique port number; the video data of the second data type is a video data packet of at least one video layer selected from the video data of the first data type, and the method further includes:
Step one, receiving a video transmission request of other terminals forwarded by an instant messaging server.
And step two, sending a video transmission response aiming at the video transmission request to the instant messaging server according to the terminal hardware attribute.
And step three, receiving the video data sent by the corresponding data processing node and playing the video data.
Based on the same inventive concept, the embodiment of the invention provides a data transmission method of a multi-platform video conference, which is applied to a data processing node. Referring to fig. 4, fig. 4 is a flowchart of a data transmission method for a multi-platform video conference according to an embodiment of the present invention. The method may comprise the steps of:
s401, receiving the routing table sent by the instant messaging server and the video transmission response of the first destination terminal.
S402, the routing table records the routing information of the first destination terminal and the second destination terminal.
And S403, receiving first video data aiming at a second destination terminal and sent by the transmission node or the terminal, and sending the first video data to the second destination terminal according to the routing table.
And S404, generating second video data aiming at the first destination terminal according to the video transmission response of the first destination terminal and the first video data.
S405, sending the second video data to the first destination terminal according to the routing table.
Based on the data transmission method of the multi-platform video conference provided by the embodiment of the invention, video data can be processed in a distributed manner, and the video data of the terminal corresponding to each data processing node is processed by a plurality of data processing nodes, so that the delay of a data transmission system is reduced, and the utilization rate of the whole network resources is improved.
In one implementation, the data processing node may copy the first video data, then delete some video layers in the first video data, and only reserve the video layer requested by the video transmission response of the first destination terminal.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (7)
1. A data transmission system of a multi-platform video conference is characterized in that a transmission network where the system is located comprises an instant messaging server, a plurality of terminals and a plurality of transmission nodes; wherein:
The source terminal is used for sending a video transmission request to the instant messaging server; the source terminal is any one of a plurality of terminals; the video transmission request comprises a source IP address of the source terminal and a first data type of the transmitted video;
the instant communication server is used for forwarding the video transmission request to a plurality of destination terminals; each destination terminal is any one terminal except the source terminal in the plurality of terminals;
each destination terminal is used for sending a video transmission response to the instant messaging server according to the video transmission request; the video transmission response comprises the destination IP address of the destination terminal and a second data type of the video requested to be transmitted by the destination terminal;
the instant messaging server is further used for determining the transmission sequence of each destination terminal according to the second data type of each destination terminal, and taking the first transmission sequence as the main destination terminal; determining a transmission path from the source terminal to each destination terminal and a data processing node corresponding to each destination terminal according to the transmission sequence, a pre-stored network topology of the transmission network and the current transmission delay among a plurality of transmission nodes; each data processing node is any one of a plurality of transmission nodes; sending a video transmission response of the main and target terminals to the source terminal; sending a video transmission response and a routing table of a destination terminal corresponding to the data node to each data processing node;
The source terminal is further configured to send the video data of the first data type to the primary destination terminal;
each data processing node is used for sending video data of a second data type corresponding to a destination terminal to the destination terminal corresponding to the data node according to a video transmission response and a routing table when the video data passes through the data processing node;
each destination terminal is used for receiving the video data of the second data type corresponding to the destination terminal and playing the video data.
2. A data transmission method of a multi-platform video conference is characterized in that the method is applied to an instant messaging server; the transmission network where the instant messaging server is located is composed of the instant messaging server, a plurality of terminals and a plurality of transmission nodes;
the method comprises the following steps:
receiving video transmission responses of a plurality of destination terminals aiming at the video transmission request of the source terminal; the source terminal is any one of a plurality of terminals of the transmission network, and the destination terminal is a terminal except the source terminal in the plurality of terminals of the transmission network; the video transmission request comprises a source IP address of the source terminal and a first data type of the transmitted video; the video transmission response of each destination terminal comprises a destination IP address of the destination terminal and a second data type of the video requested to be transmitted by the destination terminal;
Determining the transmission sequence of each destination terminal according to the second data type of each destination terminal, and taking the first transmission sequence as a main destination terminal;
determining a transmission path from the source terminal to each destination terminal and a data processing node corresponding to each destination terminal according to the transmission sequence, a pre-stored network topology of the transmission network and the current transmission delay among a plurality of transmission nodes;
sending the video transmission response of the main and target terminals to the source terminal; so that the source terminal sends the video data of the first data type to the primary destination terminal;
sending a video transmission response and a routing table of a destination terminal corresponding to the data node to each data processing node; when the video data passes through the data processing node, sending the video data of the second data type corresponding to the destination terminal corresponding to the data node according to the video transmission response and the routing table.
3. The data transmission method of claim 2, wherein the video data of the first data type is a video data packet comprising multiple video layers; each video layer has a unique port number; the video data of the second data type is a video data packet of at least one video layer selected from the video data of the first data type;
Determining the transmission sequence of each destination terminal according to the second data type of each destination terminal, and taking the first transmission sequence as a main destination terminal, wherein the method comprises the following steps:
determining the number of video layers of the second data type of each destination terminal, and determining the transmission sequence of each destination terminal according to the sequence from the large number of the video layers to the small number of the video layers;
when the number of the video layers of the second data type of a plurality of destination terminals is the same, randomly sequencing the destination terminals;
and the terminal with the first transmission sequence as a main target.
4. The data transmission method of claim 3, wherein determining the transmission path from the source terminal to each destination terminal and the data processing node corresponding to each destination terminal according to the transmission sequence, a pre-stored network topology of the transmission network, and the current transmission delay between the plurality of transmission nodes comprises:
determining a transmission path with the minimum time delay from the source terminal to the main destination terminal as a main path according to a pre-stored network topological graph of a transmission network and the current transmission time delay between a plurality of transmission nodes;
determining a transmission node of a transmission path with the minimum time delay from each node on the main path to a second destination terminal as a data processing node of the second destination terminal, wherein the transmission path is used as a branch path; the second destination terminal is a next destination terminal of the main destination terminal determined according to the transmission order;
And determining a transmission path and a data processing node of a next destination terminal of the destination terminal from each node of the branch path of the destination terminal according to the transmission sequence.
5. A data transmission method of a multi-platform video conference is characterized in that the method is applied to a terminal, and a transmission network where the terminal is located is composed of an instant messaging server, a plurality of terminals and a plurality of transmission nodes;
the method comprises the following steps:
sending a video transmission request to the instant messaging server; so that the instant messaging server forwards the video transmission request to a plurality of other terminals and receives video transmission responses of the plurality of other terminals aiming at the video transmission request; the video transmission request comprises a source IP address of the terminal and a first data type of the transmitted video; the video transmission response of each other terminal comprises the destination IP address of the other terminal and the second data type of the video data requested to be transmitted by the other terminal; determining the transmission sequence of each other terminal according to the second data type of each other terminal, and taking the first transmission sequence as a main target terminal; determining a transmission path from the terminal to each other terminal and a data processing node corresponding to each other terminal according to the transmission sequence, a pre-stored network topology of the transmission network and the current transmission delay among the plurality of transmission nodes; the transmission network is composed of a plurality of terminals and a plurality of transmission nodes; sending the video transmission response of the main target terminal to the terminal; sending video transmission response and routing table of other terminals corresponding to the data node to each data processing node;
Receiving a video transmission response of the main target terminal, and sending the video data of the first data type to the main target terminal; when the video data passes through the data processing node, the video data of the second data type corresponding to the other terminal is sent to the other terminal corresponding to the data node.
6. The method of claim 5, wherein the video data of the first data type is a video data packet comprising multiple video layers; each video layer has a unique port number; the video data of the second data type is a video data packet of at least one video layer selected from the video data of the first data type, the method further comprising:
receiving video transmission requests of other terminals forwarded by the instant messaging server;
sending a video transmission response aiming at the video transmission request to an instant messaging server according to the terminal hardware attribute;
and receiving the video data sent by the corresponding data processing node and playing the video data.
7. A data transmission method of a multi-platform video conference is characterized in that the method is applied to a data processing node; the transmission network where the data processing node is located is composed of an instant messaging server, a plurality of terminals and a plurality of transmission nodes; the data processing node is any one of a plurality of transmission nodes;
The method comprises the following steps:
receiving a routing table sent by an instant messaging server and a video transmission response of a first destination terminal;
the routing table records routing information of a first destination terminal and a second destination terminal;
receiving first video data which are sent by a transmission node or a terminal and aim at the second destination terminal, and sending the first video data to the second destination terminal according to the routing table;
generating second video data aiming at the first destination terminal according to the video transmission response of the first destination terminal and the first video data;
and sending the second video data to the first destination terminal according to the routing table.
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