Foreword
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With the popularization and application of the network, multimedia technology is also an electronic science technology that has emerged in the past years. It combines television-based audio-visual information dissemination capabilities with computer interaction control functions to create a new information processing model (audio and video technology) that integrates text, graphics, sound and image. In real life, the use of digital sound, image data and high-speed transmission has become a symbol of a country's technical level and economic strength. Then, what are the characteristics and functions of multimedia technology? Xiao Bian makes a simple summary (audio and video processing technology) on the characteristics and functions of multimedia technology by collecting and collating data.
The characteristics of multimedia technology
Diversity: The diversity of information media, which can handle a variety of information such as text, graphics, images, animation, audio and video.
Interactivity: Refers to the user's ability to interact with a variety of information media on a computer to provide users with a means to more effectively control and use information.
Integration: Integration refers to the integrated processing of multiple media on a computer-centric basis, including the integration of information media and the integration of these media devices. This integration includes multi-channel unified acquisition of information, unified access, organization and synthesis of multimedia information. On the hardware side, it has a high-speed and parallel CPU system capable of processing multimedia information, large-capacity storage, and a communication interface suitable for multimedia multi-channel input and output capabilities and bandwidth. For software, there should be an integrated and integrated multimedia operating system.
Real-time: The multimedia system provides real-time processing of time-based media such as sound and video.
Classification of multimedia technologies:
Perceived media: Help people to perceive the environment. In the computer, how people perceive information, mainly through graphics, images, animation, voice, sound, music, and so on.
Represents media: In a computer, how information in a computer is encoded.
Performance media: tools and devices for information input/output, in which the computer refers to what media is input to or output from the computer. Output media and keyboards such as monitors, printers, speakers, etc.
Storage media: refers to the data carrier that can support information storage, and the computer refers to the location where information is stored. Tapes and discs, etc.
Transmission media: used to transmit data information, in the computer refers to the medium that transmits information.
The main contents studied by multimedia technology include 1. data compression; 2. data exchange; 3. input/output technology and equipment; 4. storage technology; 5. hypertext and hypermedia; 6. multimedia database system; Reality technology; 8. Video on demand and interactive TV; 9. Distributed multimedia system; 10. Multimedia conference system
The role of multimedia technology
Enables computers to have full-motion, full-video playback, editing, and authoring of multimedia information.
It has the function of controlling and transmitting multimedia e-mail, video conferencing and other video transmission.
The multimedia technologies that implement the above functions include the following aspects:
data compression
Compression algorithms can be roughly divided into two types, lossy compression and lossless compression. Sometimes, compression algorithms that use both lossy and lossless compression are called hybrid compression.
·Data exchange
Data exchange refers to the exchange of data between different systems. In multimedia technology, the main research is the format of data files, because the exchange must be based on a unified standard.
·Input / output technology and equipment
Form a peripheral device indispensable for a multimedia system, such as: keyboard, mouse, microphone, audio card, video
Cards, scanners, digital cameras, camcorders, monitors, printers, etc.
Storage technology
The large amount of data in multimedia data and the requirement for data transfer rate during access make storage technology a very critical part of multimedia. From basic storage media to storage extensions and more.
·Multimedia database system
Multimedia database contains a variety of data types, data relationships are more complex, multimedia database management (MDBMS), object-oriented multimedia database system and content-based multimedia index technology and its standards have become the main content of research.
·virtual reality technology
Imitate real or imagined 3D environments and complete real-time interactions. Visual, auditory and even tactile feedback in virtual reality technology is an ideal human-computer interaction interface.
Multimedia communication and distributed multimedia systems
The combination of multimedia technology with network technology and communication technology has emerged in many fields, such as video telephony, video on demand and interactive television, and computer-supported collaborative work technology based on distributed multimedia systems.
to sum up
With the wide application and continuous development of information network science and technology, multimedia technology will become the mainstream technology for the development of social entertainment systems in the future. For consumer electronics developers, it is useful to understand the basics of the features and functions of multimedia technology.
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