What is the specific meaning of multimedia?

The English word for Multimedia is multimedia, which consists of two parts: media and multi. Generally understood as the synthesis of various media.

Multimedia technology is not a simple combination of various information media. It is an information technology that combines information in the form of text, graphics, images, animations and sounds, and is comprehensively processed and controlled by computers. It can support a series of interactive operations. The development of multimedia technology has changed the application field of computers, making computers become common tools in the information society from special products in offices and laboratories, and widely used in industrial production management, school education, public information consultation, commercial advertisements, military command and training, and even family life and entertainment.

Multimedia technology has the following main features:

(1) integration can acquire, store, organize and synthesize information through multiple channels.

(2) Controllable multimedia technology takes computer as the center, comprehensively processes and controls multimedia information, displays it in various media forms according to people's requirements, and acts on people's various senses at the same time.

(3) Interactivity Interaction is one of the main characteristics that distinguish multimedia applications from traditional information exchange media. Traditional information communication media can only spread information in one direction and passively, while multimedia technology can realize people's active choice and control of information.

(4) The nonlinear characteristics of nonlinear multimedia technology will change people's traditional sequential reading and writing mode. In the past, people mostly used the framework of chapters and pages to acquire knowledge step by step, while multimedia technology will present the content to readers in a more flexible way with hypertext links.

(5) Real-time when the user issues an operation command, the corresponding multimedia information can be controlled in real time.

(6) Convenience of information use Users can use information according to their own needs, interests, task requirements, preferences and cognitive characteristics, and take any form of information such as pictures, texts and sounds.

(7) Dynamic information structure "Multimedia is a book that can never be read". Users can reorganize information, add, delete or modify nodes and re-establish links according to their own purposes and cognitive characteristics.

1.2 file

Various coded data representing media are stored in a computer in the form of files, which is a collection of binary data. The naming of files follows specific rules and usually consists of a main name and an extension. The primary name and extension are defined by "." The extension is used to indicate the format type of the file.

1.3 Types and characteristics of multimedia information

(1) Text is an information form expressed by words and various special symbols, and it is the most widely used way of information storage and transmission in real life. Expressing information in words gives people rich imagination, which is mainly used for descriptive representation of knowledge, such as explaining concepts, definitions, principles and problems, and displaying titles, menus and other contents.

(2) Image is one of the most important forms of information expression in multimedia software, and it is the key factor to determine the visual effect of multimedia software.

(3) Animation Animation is to quickly play a series of graphic images with continuous motion changes by using the persistence characteristics of human vision, including scaling, rotation, transformation, fading in and out and other special effects. Through animation, abstract content can be visualized, and many difficult teaching content changes are vivid and interesting. Rational use of animation can achieve twice the result with half the effort.

(4) Voice is one of the most convenient and familiar ways for people to convey information and exchange feelings. In multimedia courseware, sound can be divided into three categories according to its manifestations: explanation, music and effect.

(5) Video images Video images have time series and rich information connotations, and are often used to explain the development process of things. Video is very similar to movies and TV that we are familiar with. It is vivid and plays an important role in multimedia.

1.4 multimedia computer system

Multimedia computer system is not a single technology, but the integration of various information technologies, which are comprehensively applied to computer systems to realize various functions such as information input, information processing and information output.

A complete multimedia computer system consists of multimedia computer hardware and multimedia computer software.

First of all, the hardware of multimedia computer

The main hardware of multimedia computer includes audio information processing hardware, video information processing hardware and CD-ROM drive besides the conventional hardware such as host, floppy disk drive, hard disk drive, display and network card.

(1) sound card is used to process audio information. It can carry out analog-to-digital conversion (A/D) and compression on the sound information input by microphones, tape recorders and electronic musical instruments. It can also recover (decompress) the digitized sound signal processed by the D/A computer, and then play it with a speaker or record it with a recording device.

(2) The graphics card is used to support the input and output of video signals (such as TV).

(3) The acquisition card can convert TV signals into computer digital signals, which is convenient for editing, processing and color control of the converted digital signals with software. The processed digital signal can also be output to the video tape.

(4) The scanner scans the words and images on photographic works, painting works or other printed matter, and even the physical objects into the computer for processing.

(5) Optical disk drives are divided into read-only optical disk drives (CD-ROM) and read-write optical disk drives (CD-R, CD-RW), also known as burners. Which is used for reading or storing large-capacity multimedia information.

The second is multimedia computer software.

The multimedia computer operating system must expand the multimedia resource management and information processing functions on the original basis.

Multimedia editing tools include word processing software, drawing software, image processing software, animation software, audio editing software and video editing software.

The authoring tools of multimedia application software are used to help application developers improve their development efficiency. They are generally application program generators, which organize various media materials in the form of hypertext nodes and chain structures to form multimedia application systems. Authorware, Director and Multimedia Toolkit are all well-known multimedia creation tools.

1.5 Basic mode of multimedia teaching

Teaching mode refers to a paradigm of teaching and learning to complete teaching tasks, which includes teaching mode, learning mode and related teaching strategies.

(1) classroom demonstration teaching mode (classroom explanation teaching mode) This teaching mode has two main ways in classroom teaching: teaching presentation and simulation demonstration.

(2) Personalized teaching mode The multimedia courseware of personalized teaching mode generally includes: introduction, teaching control, encouragement, presentation of teaching information, response to questions, diagnosis of response, feedback and remedy of response, and ending.

There are two kinds of multimedia courseware corresponding to personalized teaching mode: multimedia teaching materials and teaching-assisted electronic reading materials.

(3) The problems involved in computer simulation teaching mode are: basic model, simulation presentation and performance, system response and feedback.

(4) Inquiry teaching mode Inquiry teaching mode generally consists of determining problems, creating teaching situations, inquiry learning, feedback and evaluating learning effects.

The main limiting factors are distraction and disorientation.

⑤ Cooperative teaching mode

(6) Internet-based distance teaching mode

1.6 multimedia computer teaching system

First, the hardware environment of multimedia computer teaching

(1) classroom demonstration classroom

② Network classroom

③ Modern teaching resource center and electronic reading room.

④ Campus network

Second, the multimedia computer teaching software system

(1) multimedia production software

Word processing: Notepad, WordPad, Word, WPS.

Graphic image processing: PhotoShop, CorelDraw, hand-drawing.

Animation: AutoDesk Animator Pro, 3DS MAX, Maya, Flash.

Sound processing: Ulead Media Studio, Sound Forge, Cool Edit, Wave Edit.

Video processing: Ulead Media Studio, Adobe Premiere

② Creation tools

Programming languages: Visual Basic, Visual C++, Delphi.

Multimedia writing system: Authorware, Director, reference book, Flash.

③ Multimedia computer teaching software

All kinds of teaching courseware that can be used for classroom teaching, counseling and demonstration.

The second chapter is the structural design of multimedia courseware.

2. 1 multimedia courseware development process

First, the composition of the multimedia courseware development team

(1) Project leader

② Subject teaching experts

③ Instructional design experts

(4) software engineer (system structure design expert)

⑤ Multimedia material production experts

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