Analyze the composition of a complete video conference system

Many customers will ask this question, what are the components of a complete video conferencing system? Let's break down the composition of the video conferencing system. A complete video conference system usually consists of five parts: audio and video input and output system, video conference terminal (software or hardware), multipoint control unit, transmission network and related accessories. Because users have different existing network conditions and hardware facilities, the requirements for the video conference terminal system, multipoint conference controller MCU, network conditions and other parts of the video conference system are also different. 1. Audio and video input and output system. Audio and video inputs are mainly (microphones and cameras). Audio and video output are mainly (sound and display equipment, such as TV walls and projectors). 2. Classification of video conferencing terminals. The main video conferencing terminals are Two types: conference room type and desktop type. 1. Conference room terminal The conference room terminal provides almost any solution required for video conferencing, and is generally integrated in a conference room. Conference room terminals usually combine a large number of accessories, such as audio systems, additional cameras, document projectors, and PC collaborative file communication. The dual-screen display, abundant communication interfaces, and selection of graphics and text streams make the terminal a high-end and comprehensive product. Main application: Conference room terminal is mainly designed for medium and large enterprises. 2. Desktop terminal The desktop terminal is an ingenious combination of a powerful desktop or laptop computer, a high-quality camera (built-in or external), an ISDN card or network card, and video conferencing software. It can effectively make people at the desk or people traveling to join your meeting and communicate face-to-face with you. Main application: Desktop video conferencing terminals are usually allocated to special individuals in the office or people who work on business trips. Although desktop video conferencing terminals support multipoint conferences (for example, a conference contains more than 2 conference sites), it is mostly used for point-to-point conferences (for example, a meeting between one person and another). 3. Multipoint control unit MCU Multipoint control unit is also called multipoint conference controller, and its English name is Multi Control Unit, or MCU for short. MCU is the key equipment of the multipoint video conference system. Its role is equivalent to the role of a switch. After synchronization and separation, the information flow from each conference site is extracted to extract audio, video, data and other information and signaling. Then send the information and signaling of each conference site to the same processing module to complete the corresponding audio mixing or switching, video mixing or switching, data broadcasting and routing, timing and conference control, etc., and finally All kinds of information needed for the points are recombined and sent to the corresponding terminal system equipment. Fourth, the transmission network The transmission network is the broadband connection method, usually there are four methods such as LAN access, ADSL access, cable modem access and wireless access. V. Auxiliary equipment Which ancillary equipment is needed for a video conferencing system depends on the specific application requirements. The ancillary equipment usually used includes projectors, monitors/TVs, large amplifiers, microphones, large cameras, DVD players, and video recorders. , Audio, power amplifier, external remote control, writing board, central control, memory card, projector, plasma screen, computer monitor, and various connecting lines.