Media is the intermediary to realize information exchange between people. In short, it is the carrier of information, also known as media. Multimedia means multimedia, which can be understood as the general name of various media such as words, graphics, images, animations, sounds, videos, etc., which directly affect people's senses, that is, the forms of expression and modes of communication of various information carriers.
Multimedia MMS (Multimedia Message Service) is one of the highest standards for the development of short message technology. Its biggest feature is that it can support multimedia functions. With the help of high-speed transmission technologies such as edge (enhanced data rate of GSM e-operation) and GPRS, WAP is used as the carrier to transmit video clips, pictures, sounds and words, which can not only transmit multimedia between mobile phones. It can also be transmitted between the mobile phone and the computer; The average short message capacity is 30,000 bytes, and the maximum can reach 654.38+ million bytes. The mobile phone with MMS function has a built-in media editor, which can write multimedia information. If a built-in or external camera is installed, users can also make and transmit information or electronic postcards in PowerPoint format.
Multimedia technology is not a simple combination of various information media. It is an information technology that combines information in the form of words, graphics, images, animations and sounds, and is comprehensively processed and controlled by a computer, which can support a series of interactive operations. The development of multimedia technology has changed the application field of computers, which has changed computers from special products in offices and laboratories to ordinary tools in the information society, and has been widely used in industrial production management, school education, public information consultation, commercial advertisements, military command and training, and even family life and entertainment.
Multimedia system
Multimedia computer system is not a single technology, but the integration of various information technologies, which are comprehensively applied to a computer system 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 besides the conventional hardware such as host, floppy drive, hard disk, monitor 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 restore (decompress) and D/A the digitized sound signal processed by the computer, and then play it out with a loudspeaker 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, images and even objects on photographic works, paintings or other printed matter into the computer for processing.
(5) Optical drives are divided into read-only optical drives (CD-ROM) and read-write optical drives (CD-R, CD-RW), also known as burners. Which is used for reading or storing large-capacity multimedia information.
Multimedia technology has the following main features:
(1) integration can acquire, store, organize and synthesize information through multiple channels.
(2) Controlled multimedia technology is a computer-centered comprehensive processing and control of multimedia information, which is displayed 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, sections and pages to acquire knowledge step by step, while multimedia technology will present the content to readers in a more flexible way with the help of 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 can take any form of information such as pictures, words 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.
Making scripts is the direct basis for collecting, processing materials and integrating works during the development of multimedia works. The content of the script includes the material and its position on each specific screen of the whole multimedia work, the sequence of material presentation, effect, interaction mode, link and link target, navigation mode, etc.
Scripts are usually designed in the form of cards, and each card describes a screen. The content of the script includes serial number, content, designer, page frame structure, page description, production points and so on. The script is shown in the table.
Fundamentals of multimedia technology
1. Multimedia technology is an information technology that comprehensively processes words, graphics, images, videos, animations and sounds and displays them on the screen to complete a series of interactive operations.
2, the characteristics of multimedia technology
● Multimedia information display.
● Digitization of information processing
● Hypertext structure of information organization
● Large capacity information storage
● Interactivity
3. Key technologies of multimedia
● Chip technology
● Digital technology
● Data compression technology
● Data storage technology
4. Common multimedia systems
Characteristics and functions of multimedia technology teaching application
1, function
● Display teaching information by multimedia to provide students with diversified external stimuli.
Organize teaching information with hypertext structure to provide students with diverse and flexible cognitive methods.
● Provide students with a friendly interactive interface, so that students can actively participate in the cognitive process and reflect their subjective status.
2. Function
● Promote the exploration of new teaching mode.
● Promote the construction of modern teaching environment.
● Promote the construction of modern textbook series.
● Promote the cultivation of students' ability and quality.
● Promote the change of teachers' teaching concept.
(C) to carry out the basic work of multimedia technology teaching application
1, the construction of multimedia teaching environment
● Environment based on classroom teaching
-Multimedia integrated classroom
● Environment based on personalized learning
-Audio-visual reading room, CAI classroom based on network
● An environment based on negotiation learning.
-Multimedia network environment
● Internet environment based on distance education.
Multimedia system refers to a system that uses computer technology and digital communication network technology to process and control multimedia information.
Multimedia system is a very general concept, which generally includes software and hardware. In terms of hardware, network equipment, multimedia playback equipment, audio and display equipment, simple multimedia editing and production equipment, etc.
Software: multimedia playing software, surfing software, simple multimedia editing software and basic system software, such as operating system and sound system.