Study And Realize Image Coding And Decoding Based On Multiple Platform

This paper's background is scientific research task supported by Beijing Eucation Committee — developing image web server based on DSP, and author's study and realization of coding and decoding digital image is introduced on PC and DSP platforms.The study majorly includes: on PC platform, software realizes JPEG coding and decoding, and optimizes compression rate and operation speed facets to JPEG;In Wavelet coding image aspect, the middle course four-branch tree coding is designed and realized by author.From much experiment,it is demonstrated that the coding method is simpler than JPEG2000, but better than JPEG in compression rate;Embeded image web server is designed and realized, using C6711 and RCM3200.JPEG code is transplanted from PC to DSP. From much research and experiment, five frames, with 720*576 and YUV2:1:1, are compressed every minute.On RCM3200 platform, active refurbishing web with CGI function is developed.At last, on PC platform author summarizes all codes of coding and decoding image programmed by author himself, and programs the software, named by MuliPro, with processing, coding, and decoding image.At the same time the software includes audio and net functions by the way.