Video Compression Algorithm Research And Its Applications Based On The Digital Multimedia Processor

The video compression technology has already became an important topic, was also one of the key questions in multimedia technological development, but the video compression international criterion based on it has provided the solution for the video data transmission and the memory, impelled the video compression technology development, and developed its application. The H.263 standard was proposed for adapting the low code rate video communication request and based on the H.261 foundation by ITU-T (ITU Telecommunication Standardization) . It has used the mix code technology which is similar with the H.261 standard in the source code: Using the transformation coding method to remove the spatial redundancy in the air domain and using the frame predictive coding to remove the time redundancy in the time domain. But it has cancelled the loopfilter in the H.261 standard. Besides basic pattern, it also provided many kinds of pattern for adapting the communications system or the channel demand: Unrestriced Motion Vector mode, Advanced Prediction mode, PB-frames mode, Syntax-based Arithmetic Coding mode. These chosen patterns may be used independently or unifily.The work of this articleThe main contents are as follows: Understard the significance of video compression standard, and its developing process, studying H.263 Principle of work and core algorithm thoroughly. According to the H.263 principle of work, unifing the hardware characteristic of TMS320DM642, I design the H.263 hardware developing platform based on the TMS320DM642 by using high speed electron design theoretical. This platform is mainly made up of DSP (DM642), FPGA, Video Coding\Decoding chip as well as other periphery modules (SDRAM, E2PR0M) and so on. Finally realize the H.263 compression algorithm in the platform. And will have a research in the video compression each optimization method and the optimized technology based DSP. The first chapter will introduce the video compression development course. The second chapter will introduce the H.263 video compression standard. The third chapter will introduce the TMS320DM642 and the design proposal of platform, produce the detailed electric circuit schematic diagram, and introduce the high speed PCB design theory andthe board level simulation result. The fourth chapter will elaborate how to realize H.263 in the platform systemly, will produce the main program flow diagram and the core algorithm source code, and optimizing the system in the memory system and procedure code level.