The invention discloses a streaming media NAT traverse method based on the national education examination online patrol system video standard. According to the method, the transmission of SDP messages between a provincial SIP gateway server, a provincial streaming media forwarding server, a municipal SIP gateway server, and a municipal streaming media forwarding server is performed, ips and ports in the SDP messages are switched, and NAT traverse of the whole process is finally accomplished. According to the method, streaming media NAT traverse in the multistage tree-shaped topology structure network can be realized, and the problem that NAT audio and video traverse cannot be realized via SIP protocols and streaming media forwarding servers in the tree-shaped structure network based on the national education examination online patrol system video standard technical specifications.

Streaming media NAT traverse method based on national education examination online patrol system video standard

The invention discloses a multimedia communication method, a multimedia communication system and related equipment, and relates to the field of multimedia communication. The multimedia communication method comprises the steps as follows: a conference control server separately initiates multiparty communication invitations to a client and a media server, and receives media address information applied to current communication sent by the media server; the conference control server sends the media address information to the client, so that the client sends an uplink media stream to the media server, and thus the media server acquires a public network mapping address of the uplink media stream on NAT equipment via the uplink media stream. The address information of the media server applied tocurrent communication is acquired via the conference control server and sent to the client, so that the media server can acquire the public network mapping address of the uplink media stream on the NAT equipment sent by the client, and thus the media server and the client can complete communication without a TURN server, the consumption of platform resources is reduced, and the bandwidth cost foraccessing the Internet is reduced.

Multimedia communication method and system, and related equipment

The invention discloses a method for transmitting audio/video media in an SIP (Session Initiation Protocol) audio/video conference. The method comprises the steps that: when a private network terminal and a public network conference server carry out media negotiation by using an SDP (Service Discovery Protocol), using a media address carried by the SDP as a private network address (IP+Port), adding a stream media ID in the SDP media attribute, wherein the stream media ID is used as an identification of a subsequence media stream; after the terminal obtains a media address of the server, directly sending an audio/video media stream to the terminal; after the server receives the media stream, judging whether the stream ID of the server is same as that carried in the SDP of the terminal, if yes, representing that the media stream is legal; and after the server obtains a source address of the media stream from the media stream, using the source address as a destination address of the server media stream, therefore, establishing a connection between the private network terminal and the public network server media. According to the method, the process of obtaining a public network address (IP+Port) is saved, and an STUN (Simple Traversal of User Datagram Protocol (UDP) Through Network Address Translators (NATs)) server used for obtaining the public network address is also not needed, thus the process of establishing the media stream is simplified.

Method for transmitting audio/video media in SIP audio/video conference

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Method for transmitting audio/video media in SIP audio/video conference