資源描述：
《立體視頻的4維矩陣dct編碼算法》由會員上傳分享，免費在線閱讀，更多相關(guān)內(nèi)容在工程資料-天天文庫。
1、立體視頻的4維矩陣DCT編碼算法【摘要】基于4維矩陣DCT變換理論提出了一種有效的立體視頻編碼方法。通常的方法是對每個立體對都進行視差估計和運動估計，該論文的方法采用4維矩陣DCT變換去除雙目圖像數(shù)據(jù)間的冗余，因此只需進行三分之一的運動估計計算而不需做任何視差估計。第一個立體對被稱為“I立體對”，接下來的每三個相鄰的立體對被稱為一個“P立體對”，并且以4維單元的形式進行保存。僅對“P立體對”的中間時刻的塊進行運動估計，中間時刻的運動矢量被視為4維單元的統(tǒng)一的運動矢量來計算運動補償。然后，用4維矩陣DCT變換進一步的去除時域和空域上的冗余性。實驗結(jié)果
2、表明在計算復雜度大大降低的情況下該方法可以得到較好的編碼性能?！娟P(guān)鍵詞】立體視頻編碼；立體對；4維矩陣DCT變換；4維單元Asearlyasin1928,JohnLogieBairdinGreatBritainasanymentionedstereoscopictelevision［1］.Hooreimportantinbothresearchandindustry.Thisisrelatedtotheadvancesincameratechnology,putingpoestodifferenteyessimultaneously,soithas
3、anyfields,suchas3Dtelevision,3Dvideoapplication,robotvision,virtualmachine,medicalsurgeryandsoon［2］.Althoughstereovideoisattractive,theamountofvideodataandtheputationalplexityisdoubled.Agoodcodingsystemisrequiredtosolvetheproblemofhugedataitedbandesforstereovideohavetobeadapte
4、dtotheselectedscenerepresentation.Onetypeofsuchdataispolygonal3Dpointsandconnectivity.TypicallythesearestoredandtransmittedintextformatbEingatremendousportanceofefficient3Dmeshpressionandincludedatoolcalled3DMeshpression(3DMC)forstaticmeshesexploitingspatialdependenciesofadjac
5、entpolygonsinMPEG-4［3］.ThemonsystemisastraightforsreferoneofthestereovideosequencesasthemainsequenceandencodesitbytheMPEG-2/H.264videocodingstandardinhighvisualquality,andrefertheothersequencesasauxiliarysequencesandpredictthembothfromthemainsequencesusingDC,andfromtheprevious
6、auxiliaryonesusingMC［6-10］.Themainprincipleofimagepressiontechniquesistoremovedataredundancy,poraldatacorrelation.InsteadofcalculatingbothDEandMEofeverystereopairs,ethodbasedon4D-MDCTtheory.OnlyoftheeverythirdMEandnoneofDEcalculationisneeded,theputationplexityisreducedgreatly.
7、Therestofthesectionsareorganizedasfollo.ExperimentalresultsareshoIntheproposedmethod,onlyoftheeverythirdMEshouldbecalculated,paredtothetraditionalalgorithmsputingeverystereopairbybothDEandME.Then4D-MDCTinatethespatialandtemporalredundancyfurther.Accordingtothecharacteristicsof
8、HVS,aquantizationtablebasedon4D-Medcoefficientsodesandencoded
