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Coding of image sequences using a layered 2D/3D model-based coding approach

: Smolic, A.; Sikora, T.

Schäfer, R. ; Informationstechnische Gesellschaft -ITG-:
PCS '97, Picture Coding Symposium : Lectures held at the ITG-Conference, September 10 - 12, 1997 in Berlin, Germany
Berlin: VDE-Verlag, 1997 (ITG-Fachbericht 143)
ISBN: 3-8007-2300-X
International Picture Coding Symposium (PCS) <20, 1997, Berlin>
Conference Paper
Fraunhofer HHI ()
image coding; image segmentation; image sequences; motion estimation; optimisation; videotelephony; 2d/3d model-based coding; videophone applications; optimization; image separation; affine motion; rigid motion; mpeg-4 coder; fallback mode; image quality

We present a layered model-based coding approach for videophone applications which employs multiple coding modes specifically optimized to improve on specific image content. The images are separated into regions, each compliant to a certain object and motion model, e.g., 2D objects with affine motion or 3D objects with rigid motion. Each region is coded separately, with an optimized coding scheme and an individual set of coding parameters. The remaining image regions for which no model can be constructed are coded with a standard MPEG-4 coder in a fallback mode. Our results show significant improvements of the subjective image quality compared to a standard H.263 coder.