The Research And The Implement Of Video Compression Algorithm

In this thesis, an introduction to video compression principal, methods and central international video coding standards is done firstly. Then analyzing the core techniques of JPEG and MPEG-4 and proposing a scheme of MPEG-4 SP encoder, the coding function of JPEG and MPEG-4 is achieved in C successfully with test sequence;Then compare the compressed ratio of two standards,point out the key of compression is DCT and Motion Estimation algorithm. Afterwards, studying the DCT/Motion Estimation/Motion Compensation algorithm in detail and giving an adaptive rood pattern search for fast Block-Matching motion estimation.Then the simulation of several motion estimation algorithms based block-matching is given. Accordingly, a scheme of a DSP-based video compression system is put forward, with the features of TI's TMS320C6711 DSP. At last, the transplant and optimization are considered on the basis of soft and hard environments, also the simulation process.In the end, the summarization about the study result is given; meanwhile, the future research point is prospected.