基于DSP的图像编码与实现

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1、北方工业大学硕士学位论文基于DSP的图像编码与实现姓名：苏艳玲申请学位级别：硕士专业：检测技术与自动化装置指导教师：孙德辉20050530Abstl"81ctThispaperstudiesthenetworktransportingandimplementationofimagecompressionwimICETEK—C6711-IDK—YUVimageprocessplatformbasedonTMS320C6711chip，byrealizingremotevideotrafficmonitoringsystem，using

2、JPEGcriterionasabase．NamelytransportingimagedatacompressedtoRCM3200modulebyUART,terminalvisitsimagecompressedthroughIEbrowser．Firstlythispaperintroducessignificanceofimagecoding，theoryofimagecoding，internationalcriterionofimagecoding，thenintroducesthefeaturesofe6000sDS

3、Pandenvironmentofsoftwaredeveloping．RealizingJPEGcompressionencoderinClanguageonPCafterstudyingJPEGcriterion．Butthepurposeistorealizeimagecodingbyhardware，SOtheprogrammodifiedmustbetransplantedtoDSEMostlyfileoperationaremodifiedtomemoryoperationofDSP．Thesourcecodedesig

4、nedonPCisinefficientforDSPplatform，SOcodeoptimizingisnecessary．BasedonthestandardprocedureandsupportedbypowerfuldevelopmenttoolsandimagelibofC6000，thepaperpartlyoptimizesthecodeasfollows：a)adoptingthecompilingoptionstooptimizeprogram；b)usingimagelibsupposedbyTI；C)assig

5、ningthememorysector；d)usingDMAtotransmitthedatebetweeninterandoutermemories；e)modifyingthefimctionspartly；f)usingthekeywordsvolatileandfar．Theoptimizeprogramperform10timesfasterthentheoriginal．Timeneededtoachieveacompressionruduceto03sfrom3SImagedataCompressedbyDSPtran

6、sfertothenetcontrollerimplementedbyRCM3200，whichprovidesnetservicebasedonHTTPprotoc01．ThentheusercanbrowsestheseimagesbyterminalPCwiththeinteractbrowsesoftwarelikeIE．ImageswithdifferentcompressionratioaregainedbymodifytheQ(quality)parameterduringtheexperimentappliedont

7、hisimageprocessplatform．ResultsoftheexperimentimplythatdeclineoftheimagequalityisunconspicuouswhentheQparameterrangesfrom100to30．WhentheQparameterissetto25，theimagequalitydropsdistinctly．ThenaconclusionisdrewthatQparametershouldbesetabout50toobtainboth．II．acceptableima

8、gequalityandcompressionratio．Thepaperhasputforwardimprovementthinkingandmethodofapplyingtonetworktransportingandimple