Based On The Mpeg-4 Encoding Standard Video Compression And Transmission System Research And Implementation

The exaltation of the computer function and the universality of the computer network promoted the multimedia technology to develop at very fast speed. As the one of major types in the multimedia application, after digitalized,video images makes a flood of data quantity .This put forward the information processing and storage equipment, and also the imformation trsansmission network the very high request and become the bottleneck to the multimedia applications.Therefore,to reserch the effective compression algorithm for video data is of great significance for the improvement of multi-media system performance and enlargement of multi-media system application. Among many video compression standards, MPEG-4 represents the second generation compression coding technology which is based on the model / object. MPEG-4 makes full use of human eye visual identity, seize the essence of transmission of image information, proceed from the picture outline and veins,and support the interactive function based on the visual content.With its advanced coding idea, effective compression efficiency, low bandwidth requirements,high quality of image reconstruction and conformability with the trends of multimedia application which support the accessing,searching and operating based on the visual content,MPEG-4 will still be the mainstream video compression standard for a sustained period in the future .It's a smart action to impolder complicated multi-media systems based on the idea of Object Oriented modularization design. The Component Object Model proposed firstly by Microsoft shows thoughts of component programe design, and exhibits the trends of system's modularization design, and also becomes one of pop techniques in the field of computer programming. The Directshow structure syncretizes many techniques;its powerful function greatly solves many difficult problems of multi-media system's exploitation, such as hardware's different constructures, data synchronization and etc. It also frees programmer from tough bottom work and provides the convenience of transferring and operating COM components, in a word it is a good and efficient emploitation structure of flow media.This subject combines with the practical application of multimedia video system and researchs the MPEG-4 standards, coding algorithms and the realization source codes. On this basis, the research makes use of COM programming idea and DirectShow developmentframework to achieve a multimedia system. The development ways of the system has a certain reference value to shorten the development cycle, lower development costs and provide the convenience for system upgrading in practical multimedia application system development.