With the continuous development of information technology, in addition to meeting the traditional and simple meeting requirements, a modern multifunctional conference room should also have elegant sound quality and clear image presentation. It consists of large screen display, multimedia audio and video signal source, audio, switching and central integrated control. It selects DVD and video recorder with advanced functions and physical and graphic transmitters to restore its image through a large screen projector. The central integrated control equipment controls all audio-visual equipment, signal switching, lighting, screen lifting, volume adjustment and other functions in the room, which greatly improves the efficiency of the meeting and simplifies complex operations. It can be used by everyone without professional knowledge.
Diversity of multi-function halls: including conferences, academic reports, trainings, evening parties, etc., the application features are all in one, especially in line with my country's current market demand. In recent years in China, multi-function halls have been rapidly popularized and applied. The system of a multi-function hall is not a single product function, but a system project composed of many products. According to the analysis of the system, it includes the display system, signal management system, conference system, sound reinforcement system and control system. These five major systems do not have a standard configuration, but are tailor-made according to the different needs of the users for the five major systems. According to the complexity of the five major systems, they are divided into large, medium and small. Today we are discussing solutions for small multi-purpose halls with high domestic penetration.
From the perspective of system design, it is technically more complicated than a single system. Today, we analyze how to design a simple, stable, intelligent, and economical small multi-function hall from the display system, signal management system, and control system in the five major parts of the multi-function hall system.
1. Display system (see)
It is mainly composed of high-brightness projector, projection screen and related supporting equipment. It is mainly used for the display of multimedia signals (such as speech content, picture display, media audio and video playback, etc.), as well as the display of movie pictures and singing pictures. Signal input interfaces are left on the control room and the stage to facilitate the transmission of various signals.
One of the characteristics of the small multi-function hall is that it has less information, and the requirements for the display equipment are general. Generally, a projector is configured. From the perspective of cost, it is often used in combination with the electric projection screen.
The choice of projector and screen level is determined by the user's needs.
Projector selection generally determines the lumen of the projector based on the size of the room. According to different scenes, in many cases, to save space and other factors, plasma can also be used to replace the projector and screen.
In the multi-function hall system, the common video signal formats of the display system are:
◆ RF signal (TV)
◆ Composite video signal (camera, VCR, DVD, booth) ◆ S terminal (DVD, booth)
◆ VGA signal (PC, digital booth).
2. Sound reinforcement system (listening)
Sound reinforcement system design usually starts with sound field design, because sound field design is the basis for satisfying system functions and sound effects. It involves very complicated and tedious work involving the selection of speaker systems, sound supply schemes, and signal paths. Due to the rapid development of computer technology, special acoustic software tools can now be used for calculation to obtain a sound field design that meets the expected requirements. After the speaker system is determined, the drive power calculation of the power amplifier and the determination of the drive signal path can be performed; then the signal processing scheme and the selection of the mixer are further determined according to the drive power distribution scheme. The audio signal can be reproduced, and the live vocals and musical instruments can be picked up and replayed, which can meet the different requirements of sound reinforcement, such as party performances, stage performances, etc., meetings, and movie appreciation Wait.
The sound reinforcement system is mainly composed of three parts: sound source, mixer, peripheral equipment, and speaker system.
Sound sources: mainly including conference microphones and audio and video decks, DVD players and other sound source equipment, which can play ordinary or metal tapes, CD records, DVD audio and video images, and audio and video decks can also record high-quality recordings for meetings and so on.
Mixer: It is the central control device of the system, which can perform multi-channel audio signal mixing amplification, switching, high and low bass adjustment, effect compensation control, volume adjustment, recording and playback use;
Peripheral equipment: effector, equalizer, feedback suppressor, frequency divider, etc.;
Loudspeaker: The sound quality and sound field uniformity of the entire sound reinforcement system mainly depend on the quality and arrangement of the loudspeaker.