Design And Implementation Of Multi-channel MPEG-2/4 Encoder Software System

With the high-speed development of the digital technique,computer technique and communication technique, the tidal wave of digitization in radio and television field is moving forward unstoppably. Enterprises around the world begin to develop the equipments of digital radio and television system, including the video and audio encoders.This thesis mainly discusses the design and implementation of the software system for Multi-channel MPEG-2/4 Encoder. The development of Digital TV system is introduced firstly. Then the video coding standards MPEG-2,MPEG-4 and Real-time Transport Protocol used in the encoder are briefly described. Next, through the analysis of the application environment and user needs, we put forward the encoder software and hardware system design, and then discuss the function and architecture of software, the design of application protocol and database in detail. Finally, in the part of software modules design, the thesis analyzes the function of modules and discusses the key technical details and realization.Compared with ordinary encoders,This encoder implements the network transmission of encoding stream based on RTP. In the part of network transmission module design, we analyze the network transmission model and put forward the network adaptive transmission strategy. Through the judgment of network status, the strategy can dynamically adjust the coding rate in order to get the satisfied transmission quality.Because of the expansion in the function, the Multi-channel MPEG-2/4 Encoder becomes complex in software architecture. But it's still stable and flexible due to modular design concept. Now the encoder has been thrown into the market and gets a good reputation in some places.