Method for establishing an IP video-conference using a telephone network for voice transmission

Abstract

Method for establishing a video conference between audio and video communication devices, each audio device associated with a user and a telephone number and connected to the telephone network, and each video device associated with one of the users and an IP address and connected to the video device and the Internet. The method comprises: initiating a first call to at least one other audio device associated with the called user using an audio device associated with the calling user; transmitting the first call to a selected switching node of the telephone network for communication with the telephone network and the Internet The connected service node sends a message including the phone numbers of the calling and called user's audio devices; when the phone number is stored in the service node's memory, the switching node is authorized to set up the first call to communicate between the calling and called user's audio devices. If necessary, determine the addresses of the video devices of the calling and called users associated with said telephone number, thereby establishing video communication between the video devices in parallel with the audio communication.

Description

technical field [0001] The present invention relates to the field of communication networks, and more particularly to establishing video conferences in such communication networks. Background technique [0002] Several solutions have been proposed which allow the establishment of a video conference between remote communication devices connected to a communication network. [0003] The first class of solutions provides all-IP ("Internet Protocol") video conferencing by using Internet Protocol (IP), such as H.323 or SIP ("Session Initiation Protocol"), to connect audio and video devices of remote users over the Internet Transfer audio and video data between. [0004] Such schemes are effective, but their users are generally limited to those familiar with IP network operations through communication devices such as personal computers (PCs). Furthermore, the called typically must be notified before being able to be called over the Internet. Moreover, the medium used to transmi...

AI Technical Summary

Problems solved by technology

But this only allows video conferencing between user and call center, not user to user

Furthermore, this solution does not allow the calling user and the call center to start in audio-only mode (no video) and then decide when to continue in video conference mode with audio and video data transmission

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