I. Introduction

　　 The introduction of multimedia technology has revolutionized the construction of multi-functional comprehensive meeting rooms for enterprises and institutions in various industries. Facing the ever-changing social development, the continuous emergence of new technologies and new facilities, and the increasingly rich social and cultural resources, in order to adapt to the ever-increasing foreign exchanges, the education and training of the company’s employees, and the construction of corporate culture. It is necessary for all units to build a multi-functional multi-media event venue with conferences, speeches, and entertainment to meet the requirements of modern management.

　　 Adapt to the requirements and meet the needs of modern teaching-the construction of a modern multimedia comprehensive electronic classroom with complete functions and convenient operation will surely play a huge role in the field of modern teaching.

　　 Two. Basic Requirements of Multimedia Multi-function Comprehensive Meeting Room

  1. Centralized management and operation of system equipment, and organically connect video recorders, DVD players, multimedia computers, video display stands, projectors and other advanced audio-visual equipment and other remote-controllable equipment (such as electric projection screens, electric curtains, lights, etc.) into one As a whole, according to the content and requirements of the activity, various media devices are switched and adjusted.

  2.　　 Connect the Internet (internet) to the system and enjoy network resources.

　　3.　　 is equipped with on-site camera, video and recording facilities.

　　4.　　Professional stage sound system and stage lighting system can be configured if conditions permit.

　　 5.　　 has the following functions:

　?、臝t has the function of meeting loudspeaker and broadcasting, and can provide multi-channel microphone voice input connection.

　?、艻t has the functions of speech and lecture: a. Use video to display real objects, pictures, manuscripts and other materials; b. Conveniently connect the laptop to the system and use the hand computer to display the lecture content.

　?、?can play video tapes, DVDs, VCDs, CDs, audio tapes and other audio and video materials.

　?、華 multimedia computer can be used to play multimedia data, display computer operation content and surf the Internet.

　?、?All video images (including computer monitor images) signals can be switched and displayed on the large screen by the projector.

　?、蔜he console is equipped with a display and a video monitor, which is convenient for the operator to monitor or preview the playback content.

　?、?The scene can be projected on the screen, or the scene can be recorded for later use.

　?、?can control sound, light, electric curtain, electric projection screen, etc.

　　⑼ can switch and control each channel of audio and video signals flexibly and conveniently, and control system equipment intuitively and simply.

  three. Equipment Configuration of Multimedia Comprehensive Electronic Classroom

　　 1. First of all, it is necessary to configure a set of central control equipment (control platform) to centrally manage and operate various media playback equipment, and provide complete access and switching functions for input and output signals of various equipment. It is the core equipment of the entire conference room system and must meet the following requirements:

　?、?Multi-channel (more than 6 channels) audio and video signal input interface, in order to match multiple audio-visual playback equipment;

　?、?More than 2 audio and video signal output interfaces, one is used for the large screen display of the projector and high-power sound reinforcement, and the second is used for the operator to browse, monitor, and monitor the playback content;

　　⑶ have desktop computer and laptop VGA signal input interface, and can switch its output;

　?、?More than 2 computer VGA display signal output ports, one is connected to the projector, and the other is connected to the computer monitor on the console;

⑸With a powerful infrared remote control self-learning code reading function, it is suitable for the use of many types, many brands, and models of system supporting equipment without any changes to the equipment connected to the system. The equipment can be controlled by the operation of the control platform. remote control;

　　⑹ With multiple power control interfaces, it is convenient to directly control the power on and off of various equipment, as well as the lifting of electric projection screens, the opening and closing of electric curtains, and the switching of lights;

　?、?has a variety of operation and control methods (such as: dedicated operation panel, computer interface, remote control, etc.) to meet the needs of operation and use of different forms of activities.

　?、蘄ntuitive and convenient operation, complete functions, and excellent performance indicators.

　　A) Multimedia computers: play various multimedia materials, connect to the Internet, enable the conference room system with network functions, and share network resources. Multimedia computers should have the functions of comprehensively processing and managing text, images, sounds and moving images, with fast running speed, strong compatibility, and high stability; generally they should have the following configurations: CPU is P3 or more, memory is 128M or more, and high-speed CD -ROM (optical drive), high-performance sound card, in addition, you can also configure a network card, video capture card, etc.

　　B) Projector: As the display device of the system, a multimedia LCD projector should be selected, with a projection screen of 100 inches or more. The projector puts the broadcast image content on the large screen, which is required for collective viewing. The projector should have an illuminance above 1500-2000 ANSI (lumens) and a resolution of not less than 800*600; the projection screen should be electric, which is convenient for maintenance and protection of the projection screen.

　　C) Audio and video playback equipment:

　?、臯ideo display stand: can convert manuscripts, pictures, real objects, etc. into video signals, and put them on the projector through the projector.

　　 on the screen for everyone to watch. The video showcase shall have functions such as automatic iris adjustment, manual or dynamic focusing, and image zooming.

　?、芁aser disc player: DVD player is the first choice, it has higher definition, and is compatible with VCD, SVCD, and can play discs in multiple formats.

　?、?Multi-standard video player (recorder).

　?、萊ecording deck: generally use dual decks.

　?、?Radio: It is better to use independent radio head equipment.

　?、蔛atellite or cable television receiving system: used to receive broadcast resources.

　　D) Camera system: It can record live speech scenes through a video recorder, which is also convenient for live broadcasting.

　　E) Sound reinforcement equipment: It is better to use professional equipment. Professional audio equipment is more suitable for the meeting environment and requirements due to its large dynamic range, high voice fidelity requirements and good stability.

　?、臕mplifier: It should have an effective output power of 2*100W or more.

　?、芐peaker material: You can choose speaker, column or ceiling speaker. The design of its quantity and distribution should be based on the principle of obtaining a uniform indoor sound field, soft sound, and clear voice.

　　 (3) Conference microphone and wireless microphone: The quality of the microphone directly affects the conference effect. High-performance varieties should be selected.

　?、萒hose who have the conditions may consider configuring a complete set of stage professional audio equipment. It mainly includes the following equipment: high-power amplifiers, mixers, equalizers, effects, professional stage speakers, etc.

　　(F) Configure conference system equipment so that it has the functions of speaking, voting, and statistics.

　　(G) Other auxiliary equipment:

　　⑴Video monitor: It is used for the operator to browse and monitor the playback content. It can be watched by a small-screen dedicated monitor or TV, or a computer (with a video capture card) monitor.

　?、?Power supply: Whether the power supply is stable or not will directly affect the function and performance of the system equipment, as well as the effect of the activity. In severe cases, it may directly endanger the safety of the equipment. The power supply is divided into 2 ways: one way is for system equipment application. It should have a capacity of more than 3KW (kilowatts), and it is best to be equipped with an AC voltage stabilizer; the other way is for lighting, air conditioning, and high-power amplifiers.

　　 ⑶ Console: The design is simple, beautiful and generous. It must not only be able to place and protect various equipment reasonably, but also be convenient and reasonable to use.

　　 Four. General design of meeting room environment:

　　The environment of the electronic classroom should be spacious and concise. The decoration design should fully consider the layout and requirements of various equipment, facilities, power supply schemes, comprehensive wiring of various signal lines and control lines, etc.

　?、臰hether electric curtains and electric projection screens are installed, and whether they are centrally controlled by the system.

　?、艸ow to arrange the indoor lighting and whether it is controlled by the system.

　?、?Whether it is required to be connected with other systems or other electronic classrooms.

　?、菴onsider that the power cords, signal lines, and control lines of projectors, camera guns, speakers (or sound columns, or ceiling speakers) must lead to the console, and determine the wiring plan.

　?、?Configure air-conditioning facilities.

  Fives. Typical equipment configuration list (meeting room)

　　 Six. General engineering cost items

  1. equipment cost;

  2. Equipment transportation fee;

　　3. Installation equipment (including: wires, wire ducts, connectors, etc.);

　　4. Installation and commissioning fee;

　　 5. tax.

  Seven. Engineering service content

  1. Project contractors should generally provide one-year free maintenance and repair services, but projector bulbs are generally not covered by the free maintenance warranty.

  2. Free training on the use and maintenance of items and maintenance knowledge, and provide technical consulting services.

  Eight. Use and basic maintenance of system equipment

  1. Projector: LCD projector is the most expensive of the multimedia equipment, so we must pay attention to its safe operation and use:

　?、?LCD projectors are not suitable for long-term work, and their lamp life is generally 2000 hours. There are two types of bulbs: xenon lamps or metal halide lamps; when metal halide lamps are gradually aging, due to the accelerated loss of red and blue spectra in the halogen lamp spectrum, the color will shift to blue. The color stability of the surface xenon lamp is as long as the lamp life. In addition, the price of the xenon lamp is much higher than that of the metal halide lamp.

　?、艫fter using the projector, you must first use the "STANDBY" function key to turn off the projector's lamp, and let it cool down before turning off the power. Generally speaking, the power control of the central control system should have the automatic power-off function of the projector.

  2. Projection screen: The installation must be level and flexible, otherwise it is easy to damage the ring motor. It is not foldable, and the main time should be retracted after use to avoid staining and affecting the viewing effect.

　　3. Wireless microphone: After use, you should pay attention to turn off the power of the microphone to prevent the battery from running out of power too quickly due to long working hours

　　4. Power supply: After the power of all equipment of the system (including computers and projectors) is turned off, turn off the power of the central controller, and finally turn off the main power.