In computer system, multimedia refers to the man-machine interactive information exchange and communication medium which combines two or more media. The media used include words, pictures, photos and sounds? , animation and movies, as well as interactive functions provided by the program.
Multimedia is a subset of hypermedia system, which is a global information system composed of hyperlinks. The global information system is an application system using TCP/IP protocol and UDP/IP protocol on the Internet.
Two-dimensional multimedia web pages are written in HTML, XML and other languages, and three-dimensional multimedia web pages are written in VRML and other languages. Many multimedia works are distributed in the form of CD-ROM, and will be distributed more on the Internet in the future.
Extended data:
Types and characteristics of multimedia information;
1, text text is an information form expressed by words and various special symbols, and it is the most used way of information storage and transmission in real life. Expressing information in words gives people full 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 the use of human visual persistence characteristics, quickly play a series of continuous motion changes of graphic images, including scaling, rotation, transformation, fade-in and fade-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.
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. The video is very similar to the familiar movies and TV shows. It is vivid and plays an important role in multimedia.
Baidu encyclopedia-multimedia