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dc.contributor.authorNunes, P
dc.contributor.authorMarqués Acosta, Fernando
dc.contributor.authorPereira, F
dc.contributor.authorGasull Llampallas, Antoni
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions
dc.date.accessioned2016-07-21T09:29:08Z
dc.date.available2016-07-21T09:29:08Z
dc.date.issued2000-05
dc.identifier.citationNunes, P., Marques, F., Pereira, F., Gasull, A. A contour-based approach to binary shape coding using a multiple grid chain code. "Signal processing: image communication", Maig 2000, vol. 15, núm. 7-8, p. 585-599.
dc.identifier.issn0923-5965
dc.identifier.urihttp://hdl.handle.net/2117/89016
dc.description.abstractThis paper presents a contour-based approach to efficiently code binary shape information in the context of object-based video coding. This approach meets some of the most important requirements identified for the MPEG-4 standard, notably efficient coding and low delay. The proposed methods support both object-based lossless and quasi-lossless coding modes. For the cases where low delay is a primary requirement, a macroblock-based coding mode is proposed which can take advantage of inter-frame coding to improve the coding efficiency. The approach presented here relies on a grid different from that used for the pixels to represent the shape – the hexagonal grid – which simplifies the task of contour coding. Using this grid, an appraoch based on a differential chain code (DCC) is proposed for the lossless mode while, for the quasi-lossless case, an approach based on the multiple grid chain code (MGCC) principle is proposed. The MGCC combines both contour simplification and contour prediction to reduce the number of bits needed to code the shapes. Results for alpha plane coding of MPEG-4 video test sequences are presented in order to illustrate the performance of the several modes of operation, and a comparison is made with the shape-coding tool chosen by MPEG-4.
dc.format.extent15 p.
dc.language.isoeng
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Enginyeria de la telecomunicació
dc.subjectÀrees temàtiques de la UPC::Enginyeria de la telecomunicació::Processament del senyal::Processament de la imatge i del senyal vídeo
dc.subject.lcshMPEG (Video coding standard)
dc.subject.otherShape coding
dc.subject.otherContour coding
dc.subject.otherHexagonal grid
dc.subject.otherMultiple grid chain code
dc.subject.otherMotion estimation/compensation
dc.subject.otherObject-based video coding
dc.titleA contour-based approach to binary shape coding using a multiple grid chain code
dc.typeArticle
dc.subject.lemacEstàndard MPEG
dc.contributor.groupUniversitat Politècnica de Catalunya. GPI - Grup de Processament d'Imatge i Vídeo
dc.identifier.doi10.1016/S0923-5965(99)00041-7
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access
local.identifier.drac1644341
dc.description.versionPostprint (published version)
local.citation.authorNunes, P.; Marques, F.; Pereira, F.; Gasull, A.
local.citation.publicationNameSignal processing: image communication
local.citation.volume15
local.citation.number7-8
local.citation.startingPage585
local.citation.endingPage599


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