Multi-function conference system is generally composed of projection display subsystem, central control subsystem, conference speech subsystem, public address subsystem, monitoring subsystem, lighting effect subsystem and network subsystem. All systems take the computer network as the platform, share data and control information, operate in a decentralized and centralized manner. It enables equipment operators to monitor and control all equipment conveniently and simply. Today, with the rapid development of science and technology and society, people have more and more information in their daily life and work, so the information exchange and communication between people has become more and more frequent and more important. Business negotiations, product demonstrations, guest meetings, and government orders are all people-to-people exchanges. To better achieve the goal, we need to use the means we have always used - meetings. Multi-function conference system is just such an automatic conference management system that integrates computer, communication, automatic control, multimedia, image, audio and other technologies. The system organically connects independent subsystems such as meeting check-in, speaking, voting, translation, video, audio, display, network access, etc., and the central controller coordinates the work of each subsystem according to the meeting agenda. It provides the most accurate and real-time information and services for various large-scale international conferences, academic seminars and teleconferences. Multi-functional conference system uses computer, digital and network technology to network various systems. The digital signals transmitted on the line are not only greatly improve the sound quality and system reliability, but also fundamentally eliminate the defects of interference, distortion, crosstalk and system instability in general conference system. So that every delegate can hear a stable and pure voice. The system operation and meeting process are under comprehensive control, and the system operation and installation are also very simple.

1. Features of multi-function conference system

(1) The internal transmission of the digital system is all digital signals, and the microphones used by the delegates at the conference adopt the "analog-to-digital" conversion technology. Most unit devices also use analog-to-digital and digital-to-analog converters, so external analog devices (such as broadcast, recording, wired or wireless audio devices, etc.) can directly access the digital system network through the audio media interface.

(2) For meetings with any level of requirements, the corresponding system can be formed by selecting equipment matching that meets the requirements through modularization. For the established system, more multimedia devices can also be added and controlled through computer software to further expand the system.

2. Composition of multi-function conference system

Multi-function conference system can be composed of central control subsystem, multimedia projection display subsystem, speech and simultaneous interpretation subsystem (conference system in general sense), monitoring alarm subsystem, network access subsystem and operation and maintenance subsystem. Unit equipment composition and function of each subsystem:

1. Central control subsystem

The central control equipment is the core of the whole multi-function conference system. Through it, automatic conference control can be realized, and more complex conference management can also be realized through computer manipulation. The central control equipment mainly controls the speech equipment, simultaneous interpretation, electronic voting, video tracking, digital audio and video channels and data channels. Its functions are as follows:

(1) Control of speech equipment, including representative machine, chairman machine, interpreter station, dual audio interface device, multi-function connector, etc.

(2) Perform automatic audio equalization on the speakers of delegates and chairpersons.

(3) Manage microphones, request automatic registration of speeches, operate microphones in operation beyond authority, limit the number of participants, etc.

(4) The conference voting function is provided. When the chairman of the conference initiates to vote on a certain item, the representative can manipulate the speech equipment in front of him to vote, which is controlled, counted and transmitted to the display screen in the hall and displayed on the LED screen on the representative/chairman's machine through the central control equipment.

(5) Input and output control of various multimedia audio and video devices.

2. Speech and simultaneous interpretation subsystem

Speech equipment usually includes wired microphone, voting button, LED status display and conference audio, and there are other equipment to choose from, such as gooseneck conference microphone, wireless lavalier microphone, LCD status display, language channel selector, delegate ID card reader, etc. Simultaneous interpretation equipment mainly includes interpreter's desk, interpreter's headset and internal communication telephone. The speech and simultaneous interpretation subsystem can realize the functions of listening/speaking request, speech registration, receiving screen display data, participating in electronic voting, receiving simultaneous interpretation and talking with other representatives through the internal communication system. According to the different identities of the participants, the equipment they receive and the power they are assigned to are also different. After attending the meeting through application, the attending representatives can get the right to listen/watch, but have no right to speak. In particular, the speech equipment used by the chairman of the meeting can control the speech process of other representatives, and can choose to allow, refuse or terminate the speech. It also has the microphone priority function, which can make the speech of representatives in progress temporarily static.

3. Multimedia projection display subsystem

The current multi-function conference display equipment includes TV receiver, LCD screen, LCD LCD projector and DLP digital projector. The multimedia display device can provide participants with various digital, text and image information more intuitively, and can also display relevant information during the meeting in real time as required. The signal source can be video tape, computer and video player signal, and can also be video camera signal or hard disk video recorder signal from the venue. These signals are switched and displayed through video distribution of central control equipment.

4. Monitoring alarm subsystem

The monitoring equipment includes the camera at the head end, the pickup equipment and the monitor at the tail end, the hard disk video recorder or the long time video recorder. It can collect and record audio and video of the venue. On the one hand, it can monitor the internal situation of the venue for future use. On the other hand, it can send some signals to the interpretation room to improve the accuracy of the interpreter's translation. The camera shall have the audio-visual linkage function, which can automatically track the conference microphones being used in the venue and take the speakers into the picture to meet the needs of live broadcast and simultaneous interpretation.

5. Network access subsystem

The network access subsystem is to use the common communication network or computer network as the operating environment, connect the central control equipment of the main venue and the sub-venue, and realize the multi-point digital conference function in the local and wide area, so that it can support the electronic whiteboard dialogue during the meeting and support the transmission of voice, data and image files. The technology and transmission speed of video network are different due to different access modes.

6. Video tracking subsystem

Intelligent, practical, humanized and advanced microphone-camera linkage tracking function: A. The microphone ID address can be set at will on site, and the number of non-voting units can be increased or decreased at will, and the system expansion can be completed instantly; B. The intelligent remote control can quickly set the microphone ID address, and quickly adjust and save the microphone-camera linkage preset, while the main control panel can also complete the above work. When the microphone is turned on, the camera always tracks the last speaker. When the microphone is turned off, the camera tracks the last speaker. When all microphones are turned off, the camera can take pictures of any preset target (such as the venue environment or the rostrum or a specific person). The system supports a single microphone to adjust the preset position independently; C. When any preset position deviates from the speaker, the camera can be quickly adjusted through the special remote control or the system host panel; D. In some situations where it is necessary to lock the camera to track the target, the camera can be locked by remote control with one key. At this time, any microphone is turned on, and the camera will no longer be linked to track, but at this time, the camera is still controlled by the remote controller, and you can still switch and adjust the camera according to the need; When the video tracking function is required, it can be unlocked by remote control (restore the video tracking function);

7. Operation and maintenance subsystem

The operation and maintenance subsystem provides a variety of user operation interfaces. (Standard PC, LCD touch screen, manual control panel and wall-mounted panel): You can use a variety of operating platforms at the same time. The personalized control interface design makes your operation convenient and handy. At the same time, it is clear at a glance for all conference equipment.

8. Conference system auxiliary equipment

There are also some auxiliary devices that can play a coordinating role in the multimedia conference system. Here are some simple examples.

(1) Electronic whiteboard: It is as convenient to use as a blackboard, but it can instantly print the written content through the printer provided with the whiteboard.

(2) Electric screen: used in conjunction with projector to obtain high-quality large-format images.

(3) On-site lighting: coordinate with the meeting to control the on-site environment.

(4) Electric curtain: coordinate with the meeting for on-site environmental control.

Guangzhou Lanjie Audio and Video Electronic Technology Co., Ltd. is an audio and video system provider integrating research and development, design, production, sales, commissioning and maintenance. It has the broadcasting and conference brands of "Aibomm" and "Lanjie Audio and Video C-BDAV". The company mainly deals in: intelligent broadcasting, network broadcasting, digital conference, video conference, paperless conference, professional sound reinforcement, central control matrix, recording and broadcasting system and other system products. The company has successively obtained the national high-tech enterprise certification, ISO9001 quality management system certification, ISO14001 environmental management system certification, OHSAS18001 occupational health and safety management system certification, 3C quality certification, CE certification, ROHS certification, software copyright, test report, practical new type patent, quality service integrity AAA enterprise, China's top ten brands, China's green products, excellent supplier of government procurement, national scientific and technological innovation demonstration unit Intellectual property management system and other qualifications. While the products are developing towards standardization and systematization, they are constantly developing new technologies, new products and new systems, and many product technologies have reached the leading level in the industry.