Study On MPEG-4 Code Technique And Its Application

With the development of information society, multi-media technique has found extensive application areas. In the world of multi-media, video technique plays a key role, especially in the area of video surveillance, stream media and digital TV. In the real application, video technology and embedded system are integrated tightly, such as digital telecamera, MP4 and etc.Besides, with the standardization of global technique, it is inevitable to involve standard patent when the merchant debuts a new product. A piece of technique patent elected for the international standard not only is able to win a marketplace in a short time but also can help whose possessor to gain thick avails. In the respect of video and audio, it mainly has H.26x series standards of international telecommunication union, MPEG series standards of motion picture experts group and AVS standard of our country.This thesis firstly introduces the development of multi-media, then describes MPEG-4 standard detailedly, and then introduces video technique of MPEG-4, such as shape code, motion code and vein code. For the important effect of motion estimation in the video code, it specially introduces and analyses motion estimation, and proposes a new rhombus search algorithm. To check out the new algorithm, the author has implements video code by code which involves motion estimation. The experiment results demonstrate that the new algorithm improve video code to some extent.Besides, it makes a brief introduction of S3C2410X for the application of embedded video. S3C2410X has applied to various embedded system widely, its USB interface and LCD controller facilicate exploitation of USB and liquid crystal display. Finally the author fully utilizes large capacity of mobile harddisk, and then designs a MPEG-4 broadcast system based on S3C2410X. The system is easy to carry, which has certain practical value.