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Título:
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A contribution to video coding using layers
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Autor/a:
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Torres Urgell, Lluís; Lecha, M
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Otros autores:
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Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. DMAG - Grup d'Aplicacions Multimèdia Distribuïdes |
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Abstract:
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Layered representations of video sequences, originally introduced in [1], are important in several applications. Specifically, they are very appropriate for object tracking, object manipulation, content-based scalability and video coding which are among the main functionalities of the future standard MPEG-4, [2] [3]. In addition they will be also useful for MPEG-7 in the corresponding image analysis part. A robust representation of moving images based on layers has been presented in [4]. The objective of this paper is to provide the first results on video coding using the segmentation scheme presented in [4]. To that end, the shape information (alpha map) has been coded using a Multigrid Chain Code approach and the layers (the texture) have been coded using a Shape Adaptive DCT scheme that is being considered as a texture coding approach in the current definition of MPEG-4. Results are provided for a variety of compression ratios and different image quality that prove the validity of the approach. |
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Abstract:
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Peer Reviewed |
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Materia(s):
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-Àrees temàtiques de la UPC::Enginyeria de la telecomunicació
-Telecommunication
-Video coding
-Differential equations
-Discrete cosine transforms
-Image segmentation
-Image sequences
-Image texture
-Object tracking
-Telecomunicació |
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Derechos:
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Tipo de documento:
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Artículo - Versión publicada
Objeto de conferencia |
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