基于dm642的avs解码器的内存优化与软件低功耗-研究

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1、TableofContensAbstractAVSisthesecond-generationnationalaudiovideocodingstandardofChinathatisanindependentinnovation，whichisthenewgenerationofvideostandardsofourself-relianceandisalsoamilestoneofriddingthecountryoutofsourcecodingstandardsabroad．Itcameint

2、oeffectin1stMarch，2006asnationalstandardandbecameoneoftheinternationalIPTVstandardsin2007．Itsresearchingworkrelatestoourpromotionofaudioandvideocodingstandard．AVSdecoderdesignresearchisahotspottothestudy．DSP-basedplatformofAVSdecoderdesignhasbroadapplic

3、ationprospects，thepapercarriesoutmemoryoptimizationandlow-powerdesignresearchonsoftwareoptimizationtotheneedsofresource，performanceandpowerfortheembeddedapplicationsThepaperdescribestheresearchbaseatfirst，includingAVScodingstandard，AVSstreamstructure，ba

4、siccompositionandtechnologyofAVSdecoder，hardwareplatforms，softwareplatformsandSOon．AndthenisaanalysisonAVSdecodersourcecodeandfunctioncalls，inviewofthecharacteristicsofthecodeandthepreviousresearchwork，takeaoptimizationofthecode．Finallythereisadetaileda

5、nalysisofmemoryoptimizationmethodaboutAVSdecoderdesignbasedonTMS320DM642．Inmemoryoptimization，thepaperadoptstwomethodsthatarememoryoptimizationcache-basedstrategyandmemoryoptimizationmethodbasedonEDMA．Aboutmemoryoptimizationcache-based，thepaperoptimizes

6、respectivelyfromtheapplicationlevel，application-levelandalgorithmlevelandSOon．IntheoptimizationmethodEDMA-based，comparingtwodifferentwaysofEDMA，thepaperchoosesappropriateone．Andthenopimizethecodefromthreeaspectswhichistransfersofthedatadecoding，thepredi

7、ctofcolorandbrightnessandwritingbackofdecodeddata．Theexperimentalresultsshowamarkedimprovementintheperformanceofthesystem．VI原书空白页不缺内容目录第一章绪论⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯11．1课题的研究背景和意义⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯。11．2AVS解码器现状⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯31．3前期工作及存在问题⋯⋯⋯⋯⋯⋯⋯

8、⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯31．3．1针对DSP平台优化⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯41．3．2关键模块的优化。⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．51．3．3存在问题⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．61．4本文的主要工作和论文结构⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯6第二章基于DM642的AVS解码器设计基础⋯⋯⋯⋯⋯⋯．．82．1AVS解码器基本原理⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯。8