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Classification of Conference Modes:

1、Report Mode: One person speaks and everyone listens, presided over by a host, with everyone face - to - face. The basic investment for general sound reinforcement depends on the floor area of the conference room.

2、Lecture Mode: The sound reinforcement form is similar to the report mode, but sound reinforcement for the audience's questions should be prepared. A display system is required for video.

3、Discussion Mode: A round - table conference format with people sitting around. It can have functions such as sequential speaking control and speaking time control for each person. It can also be expanded to have functions like a voting system and simultaneous interpretation. The more functions there are, the higher the investment cost.

4、Dispatch Conference Mode: It places more emphasis on the display of multi - pictures and multi - information. It can also emphasize local and remote communication, as well as the distribution and recording of resolutions. The investment cost depends on the specific requirements of the content. But this is often a necessary configuration for working conditions.

5、Multimedia Conference Mode: It makes more use of video display systems in the conference sound reinforcement form, such as single - screen display of multi - pictures, multi - screen and multi - information display, information display of round - table lifters, automatic tracking of camera - based speeches, and recording of computer image signals in different forms. The more functions there are, the higher the investment cost.

6、Multimedia Teaching and Training: Based on the physical environment of the multimedia conference, teaching software is added. Functions such as courseware distribution, homework submission, teacher access, individual Q&A, and exam evaluation are included. Of course, language training functions can also be added.

7、Cinema Mode: By adding some equipment such as surround sound reinforcement auxiliary speakers and decoders to a suitable multimedia system, it can play DVD and video carriers other than for conferences. It expands the content for self - entertainment. The cost increase for small and medium - sized buildings is relatively low.

8、Video - Teleconference Mode: It realizes face - to - face communication for remote conferences through a network or an ISDN system. The cost of organizing a conference on a large network is relatively high.

9、Joint Conference Mode: Generally refers to a multi - conference room system for interaction between different conference rooms in a local building. It generally includes video and audio systems. The closer the conference rooms are to each other, the cheaper the communication and transmission cost.

10、Conference Broadcasting Mode: It is a one - way mode in the joint conference mode, that is, the sound and image of the main venue can only be received at the sub - venues, while the main venue cannot receive any information from the sub - venues. It is a simplified mode of the joint conference mode.

11、Paperless Office Conference Room: The conference is organized with the cooperation of relevant software based on the computer in front of each participant. Through the conference server, the conference software is distributed before the conference. It is possible to hold a small meeting in one venue and have several people discuss different issues in groups.

Specific Features of Main Equipment of the Conference System:

Projection and Display System

The projector is one of the essential devices in a multimedia system. In the order of invention time, they are divided into: CRT three - gun projectors (cathode ray tube technology, with the highest resolution and relatively good color), LCD liquid crystal projectors, liquid crystal light valve projectors (high brightness, large volume, and expensive), LCOS (divided into single - chip and three - chip D types), and DLP digital light output projectors (divided into single - chip DMD and three - chip DMD types, with relatively good data effects and the technology is being improved). The models are also divided into general household installation projectors, video projectors, portable projectors, engineering projectors, cinema projectors, rental models, etc. The display indicators of projectors include high - definition, standard - definition, normal, 16:9, and 4:3.

Multimedia Conference Control System

The conference system adopts an intelligent centralized control system. It consists of a central controller, transmission equipment, audio - visual equipment, remote control equipment, projection equipment, peripheral equipment, etc. It can control audio - visual and peripheral environment equipment through a wireless or wired touch screen: computers, DVDs, DVD HDD video recorders, dimmers, volume, camera systems, electric projection screens, electric curtains, VGA/video switchers, and other equipment. It can realize menu - based operation and the most important mode - based operation functions. Such as conference mode, lecture mode, multimedia presentation mode, negotiation mode, etc. If this cannot be achieved, it is just a centralized controller. It is not intelligent at all.

Conference System

Conference equipment is to better improve the conference quality, reduce the fatigue degree of participants. At the same time, it has the function of retaining information. Technically, it is divided into analog and digital types. In terms of physical communication connection: daisy - chain (line - in and line - out connection, and also divided into voice - activated start and button operation), daisy - chain + wireless transmission (generally one - way, without sound - reinforcement speaker units), wireless (generally one - way, without sound - reinforcement speaker units), infrared (two - way), automatic mixing, manual tuning, media matrix, etc. The daisy - chain method is the most used in conference forms, focusing on voice and management, but generally, domestic enterprises rarely pay attention to the requirement of conference time management function. Although its button - type operation is a bit inconvenient (voice - activated daisy - chain is rarely used in China), the digital ID code is convenient for automatic camera tracking. Wireless digital ones are rarely used by domestic users generally because of price issues. The analog system is very suitable for occasions where the conference table or personnel change a lot, but the selection of 16 - 64 frequency points sometimes causes interference and leakage problems in the conference. The two - way infrared transmission form is favored by some powerful enterprises due to its remarkable characteristics, but the price is slightly high. The conference audio system focuses on the index of sound transmission gain. It is best to choose digital equipment to facilitate the communication of video equipment for automatic camera tracking.

Sound Reinforcement Processing System

Up to now, with the global development of digitization, the analog system with independent sub - control in the sound system has been greatly impacted. However, in the small - system and low - price market, the analog system will still occupy the main position. The general audio digital media control system is an embedded audio control system under the inherent module, with a set of real - time PC software system. Through this system, any parameter can be controlled.

The user interface adopts an interface similar to an analog mixer, so that all settings are very clear, intuitive, and more interactive. Several elements in the mixing process are fixed, so as to ensure quick access to the control of the main output, preset selection, editing, trigger device selection, etc. The trigger logic input, mute group, input/output signal meter all have indicator lights. Each channel includes 3 - band input equalization, 8 - band parametric and 31 - band graphic equalizers for output, compressor, gate, delay, and crossover, etc. The display screens can be switched through direct selection keys. In particular, the stability of the embedded system of such a fixed module is much higher than that of the control software of the large - scale media matrix under the Microsoft Windows. There is no possibility of downtime, ensuring the stable performance of the system. However, the processing capacity of large - scale DSP is limited.