Research, Development Of Multimedia Applications Based On Component Technology

The development of multimedia application system, not only accord with the thinking of software engineer, but also different from others application system' s because of its traits of multi and huge storage. It will be an efficient way to develop multimedia application system using component technique.In this thesis, the major works are involved as follows:1. A multimedia application system developing model, component as its core, is put forward and the development flow of multimedia application system is discussed through introducing the changing process of the method of software developing and the development of multimedia techniques. Focusing on components making, functions such as smooth caption scrolling, 3D perspective of object and Chinese Text-to-Speech are encapsulated into components that can be reused.2. The pronunciation of words and phrases are stored in database table with wav file format and index is created. The maximum match method is designed to find out the pronunciation of words or phrases maximum matched with the text, the process of text-to-speech is realized.3. Using 4D coordinate to express the convert matrix of perspective, it is predigested to calculate Z coordinate through changing to one. The coordinates of pixels in screen correspond with the Z coordinate of object surface are modified by adding the numbers of buffer. The method of 3D perspective using DirectX buffer is improved. So does the precision of perspective.4. The Windows API techniques are described in detail. A method to realize smooth text scrolling by using Windows API is discussed.5. The MuCtimedu Teaching System of Jfeart is designed and accomplished using components, directed by the developing model mentioned above andVB as its tool. The teaching process of the structure of heart, with traits of clear, intuition, easy operating and extending, is illustrated by using this system. The system can be updated and extended easily by modifying the components. The essential characteristic of multimedia application' s development based on components technique is fully reflected.The component technique, a very important way to improve efficiency, ensure quality and solve reuse of the software development, can realize many applications efficiently and neatly that can inter input and output, reuse, completely distributed and independent of language. With the development of component technique, its functions in applications are becoming more and more important.