What is multimedia hardware?

Common multimedia hardware includes optical disk storage, input and output devices, digital video interactive systems, video cards and communication devices.

1, optical disk storage?

It consists of an optical disk drive and an optical disk. CD-ROM has a large amount of information and fast information reading speed, so it is an essential external memory for multimedia computers.

2. Input and output devices?

Include image scanner, digital camera, digital video camera, TV camera, display device, touch screen and small computer system interface (SCSI).

3. Graphics card?

The input video signal is collected and compressed, stored in the hard disk as a video file, and can be played back after decompression. Compression and decompression should be carried out in real time and follow JPEG or MPEG series standards.

4. Sound card?

The PC card processing audio signals generally has the functions of stereo synthesis, analog mixing, A/D and D/A conversion in stereo mode, digital signal processing, CD-ROM interface, output power amplification and so on.

5. Communication equipment?

The multimedia computer is connected with the network through a modem to realize multimedia information communication.

Extended data

Types and characteristics of multimedia information

1, text

Text is a form of information expressed by words and various special symbols. It is the most widely used information storage and transmission mode 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.

Step 2: Image

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.

Step 4 sound

Phonetics 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 connotation, 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.