A video conference is a meeting in which people in two or more locations conduct face-to-face conversations through communication devices and networks. Video conferences can be divided into point-to-point conferences and multipoint conferences depending on the number of venues. Individuals in daily life do not have requirements for the security of conversation content, conference quality, and conference size. Video software such as Tencent QQ can be used for video chat. Commercial video conferences of government agencies and enterprises require stable and secure networks, reliable conference quality, and formal conference environment. Professional video conferencing equipment is required to set up a dedicated video conferencing system. Since such video conferencing systems use television to display, they are also called video conferences and video conferences. Using the video conferencing system, participants can hear the sounds of other venues, see the images, movements and expressions of other participants on the venue, and send electronic presentations to give participants an immersive feel.
The video conference system consists of a video conference terminal, a video conference server (MCU, Multipoint Control Unit), a network management system, and a transmission network. 1. The video conference terminal is located at the terminal of each conference location. Its main job is to encode and transmit the local video, audio, data and control information; decode and restore the received data packet to video, audio, data and control. information. The terminal device includes a video capture front end (broadcast camera or pan/tilt machine), a display, a decoder, a codec, an image processing device, a control switching device, and the like.
2. The video conference server (MCU) serves as a video conference server. The MCU provides data exchange, video and audio processing, conference control and management services for each terminal of the two-point or multi-point conference, and is an indispensable device for the opening of the video conference. Three or more videoconferencing endpoints must use one or more MCUs. The size of the MCU determines the size of the video conference.
3. Network Management System The network management system is the management platform for interaction between conference administrators and MCUs. The video conference server MCU can be managed and configured, conferences, and conferences are controlled on the network management system.
4. Transmission network conference data packets are transmitted between terminals and servers through the network. A secure, reliable, stable, high-bandwidth network is a necessary condition for ensuring smooth video conferences. The transmission equipment mainly uses long-distance digital channels such as cables, optical cables, satellites, digital microwaves, etc., and is temporarily composed according to the needs of the conference. When the video conference is not open, these channels are the channels of long-distance telecommunications.
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