地面數(shù)字高清電視中嵌入式PVR系統(tǒng)設(shè)計與開發(fā).pdf

1、中國科學技術(shù)大學碩士學位論文地面數(shù)字高清電視中嵌入式PVR系統(tǒng)設(shè)計與開發(fā)姓名：金益鑒申請學位級別：碩士專業(yè)：網(wǎng)絡(luò)傳播系統(tǒng)與控制指導教師：王雷20090501AbstractABSTRACTComparedtoanalogTVtechnology，DigitaltelevisiontechnologyhasabundantadvantagesWiththesuccessfulholdingofBeijingOlympicGamesandt

2、heforthcomingShanghaiWorldExpo，ChinasdigitalTVindustryhasacquiredanewdevelopingopportunityBasedontheincreasingpopularityofADTB—TprogramsinmajorcitiesacrossthecountrythelatestHDTVsetswillcomeintoprevalence，whiletraditiona

3、lanalogTVsetswillbephasedoutItisdefinitelycostefficienttoenjoyfreeterrainHDTVprogramsbyusingaHDTVSTBButduetothelackofHDTVprogramresourcesnowadaysinOurcountryconsumerswouldundoubtedlypreferSTBsthatalsosupportSDTVsignalsTh

4、ecurrentdevelopmenttrendistoenablericheruserexperienceandmorehuman—computerinteraction，andsuchtypicalapplicationsincludeEPGandPVRtechnologies，whichallowusersmorefreedomandparticipationThispaperintroducesanewPVRsystemusin

5、geitherHDTVorSDTVADTBTsignalsbasedontheembeddedHDTVSTBThedetailsareasfollows：1)UsesthedigitalTVEPGtechnologytoprovideuserswiththeinterfacetolookoverprograminformation，andthereforerealizesgoodhuman—computerinteraction2)De

6、signseasyto—useinterfaceinthelightoftheresourcelackingcharacteristicoftheSTBplatform，andachievesabeautifulgraphicaluserinterfacebyoptimizingthecolorscheme3)DesignsabundantHDTVplayingandrecordingmodes，withtheuseofaudioand

7、videosynchronizationtechnologycaching，EPGtechnologyandprerecordentriesintechnologyinlinewithsystemhardwaresuchastheclockboardandlargecapacityharddisk4)ImprovestheEXT3filesysteminlinewiththecontradictionbetweencontinuoush

8、ighspeedreadandwriteharddiskoperationsandpossiblepoorworkingenvironment，andthishasbeentestedtohaveaneffectiveenhancementonthesystemreliabilityThePVRsystemshowsstablerecordingandbroadcastingperformanceinthetestandpractica