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1、立体视频的4维矩阵DCT编码算法【摘要】基于4维矩阵DCT变换理论提出了一种有效的立体视频编码方法。通常的方法是对每个立体对都进行视差估计和运动估计，该论文的方法采用4维矩阵DCT变换去除双目图像数据间的冗余，因此只需进行三分之一的运动估计计算而不需做任何视差估计。第一个立体对被称为“I立体对”，接下来的每三个相邻的立体对被称为一个“P立体对”，并且以4维单元的形式进行保存。仅对“P立体对”的中间时刻的块进行运动估计，中间时刻的运动矢量被视为4维单元的统一的运动矢量来计算运动补偿。然后，用4维矩阵DCT变换进一步的去除时域和空域上的冗余性。实验结果
2、表明在计算复杂度大大降低的情况下该方法可以得到较好的编码性能。【关键词】立体视频编码；立体对；4维矩阵DCT变换；4维单元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
