| This Paper introduces a new digital video and audio En/Decoder system, which based on USB 1.1 protocol and MPEG-II standard. The system integrates the function of digital camera, video presenter, TV card, MPEG decompression card, and video capture card. It has lots of advantages, such as highly integration, facility and effectively compression ability. The system has a bright and wide foreground, which can be used in video capture, video monitor, net video meeting, remote education, and so on.This paper describes the principle of hardware design and structure of software in detail, introduces some necessary knowledge and technique involved in the system at the same time, including digital picture compression method, MPEG standard, USB protocol, the developing of USB firmware and WDM drivers,the application for Windows platform, COM programming, DirectShow development kit, TCP/IP protocol and Windows Sockets,etc.The first task of this paper aims at improving the 3.5 version software offered by Stream Machine .Co, making it suitable to the standard of Chinese TV broadcast instead of the standard of USA TV broadcast. I have modified the Source Filter of the system, and realized the intention.The second task aims at developing the function of net video. Taking advantage of the ability of video capture, digital compression and digital storage, we regard the intrinsic system as a capture module of net video server system. Then I develop a Sever/Client Application, by which we can make the MPEG program stream transfer from one point to another point or to several points in LAN. Furthermore, this paper gives some advance for improvement in the end.
|
PDF Full Text Request