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Method for realizing audio/video information stream interconnection for video conference with private network terminal

A video conferencing, audio and video technology, applied in the direction of video conferencing system, pulse modulation TV signal transmission, two-way working system, etc., can solve the problems that the private network terminal cannot communicate with it, the port number is uncertain, etc.

Inactive Publication Date: 2006-10-11
北京华纬讯电信技术有限公司
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AI Technical Summary

Problems solved by technology

The private network terminals that communicate with each other adopt the SYMMETRIC NAT method. Since the port number is uncertain, other private network terminals cannot communicate with it.

Method used

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  • Method for realizing audio/video information stream interconnection for video conference with private network terminal
  • Method for realizing audio/video information stream interconnection for video conference with private network terminal

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Embodiment Construction

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0021] For video conferencing with private network terminals, the present invention adopts the following system solutions to realize intercommunication of audio and video information streams.

[0022] 1. Determine whether the network address translation method of the private network terminal is CONENAT or SYMMETRIC NAT. The judgment method is as follows: send data packets from the same private network terminal to two different external IP addresses, compare the port numbers obtained twice, if the port numbers obtained twice are the same, then judge that the network address translation mode of the private network terminal is CONE NAT mode. On the contrary, SYMMETRIC NAT way.

[0023] 2. If it is CONE NAT mode, it can directly communicate with the private network terminal through the external address and port number.

[0024] If it is a SYMMETRIC NAT method,...

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Abstract

The provided method to realize audio and video information interaction with private terminal for video conference comprises: applying terminal with data transfer capacity and independent IP address as the public relay terminal to connect to the private terminal for data package transfer. Whatever CONE NAT way or SYMMETRIC NAT way of the private terminal, this invention can both benefits to their interaction, expands bandwidth and backups the data.

Description

technical field [0001] The invention relates to the communication technology of a multimedia video conference system, in particular to the communication technology of a multimedia conference with a private network, and in particular to a method for realizing intercommunication of audio and video information code streams in a video conference with a terminal of a private network. Background technique [0002] Due to the lack of IP addresses on the public network (Internet), many users cannot obtain an independent public network IP address. The solution to this problem is to allow multiple users on the network to share an IP address. Therefore, enterprises and units establish internal LAN (private network Intranet), and each terminal in the LAN can only share one IP address to communicate with the external public network. Therefore, all private network terminals must communicate with the external public network at the same time through NATP ( Network Address Port Translation ...

Claims

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Application Information

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IPC IPC(8): H04N7/15H04N7/24
Inventor 王生安冯家邦
Owner 北京华纬讯电信技术有限公司
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