3D网格的分层多描述编码方法.pdfVIP

2011，47(1)193 ComputerEngineeringandApplications计算机工程与应用 3D网格的分层多描述编码方法 高铭徽，倪林 GAO Lin Minghui，M 中国科学技术大学电子工程与信息科学系，合肥230026 ofElectronic andInformation ofScienceand of Deparmaent Engineering Science，UniversityTedmology 3D and GAO for Mlnghul。NILin．Layeredmultipledescriptioncoding mesh．ComputerEngineeringApplications，2011， 47(1)：193-196． ． Abstract：The for3Dmesh combinesthe of MultipleDescriptionCoding)methodproposed advantages LMDC(Layered both and meshis toderiveabasemeshandthereconstructioninforma- layeredmultipledescriptioncoding．The decomposed theideaof basemeshis encodedasthebase andthereconstructioninformationas tion．Adopting layeredcoding，the layer theenhance MDCmethodbasedonvertex treeisusedtoensRrethattheclientsCan layer．The spanning base ismore tothecurrentnetworkofreal-timemeshtransmissionandthe able LMDC，it pur- mesh．Byusing appropriate of simulationshave thatthemethodcan a ratioandcanstillrestorean suit higherquality．The proved gethighcompression in of meshtheCase loss． acceptable packet words：3Dmesh Key compression；layeredcoding；multipledescriptioncoding 摘要：结合分层编码与多描述编码的优势，提出三维网格分层多描述编码(LMDC)方法：先对3D网格进行几何分解，得到一个 粗糙网格和细化网格所需的连通性信息，采用分层编码思想，粗糙网格作为基本层，而将细化信息作为增强层。同时采用基于顶 点分裂树的多描述编码方法对基本层加以保护，保证基本层在差错信道中的有效传榆。采用分层多描述编码对3D模型进行编 码的方法，非常适合于带宽受限和多路径传输的异构网络