3 - Méthodes adaptatives appliquées au codage prédictif intra et inter-images

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URI: http://hdl.handle.net/2042/1661
Title: 3 - Méthodes adaptatives appliquées au codage prédictif intra et inter-images
Author: PESQUET (J.-C.); TZIRITAS (G.)
Abstract: On généralise des méthodes unidimensionnelles de filtrage adaptatif transverse, on propose un procédé pour adapter un quantificateur à la dynamique d'un signal bidimensionnel. Des simulations montrent l'intérêt de ces techniques dans le cas de codages intra et inter-images. Gain de 40% sur la distorsion quadratique
Description: This paper deals with the use of adaptive algorithms in the DPCM coding of images . We generalize one-dimensional methods of tranversal adaptive filtering and propose a means of adapting a quantizer to the dynamic range of a two-dimensional signal. Simulations prove the interest of these techniques for the intra and interframe cases . So, in comparison with a fixed coder, a 40% improvements is obtained for the quadratic distortion . Finally, we present some modifications to the algorithme which make them robust to transmission errors.
Subject: Codage; Traitement image; Algorithme adaptatif; Prédiction; Modulation impulsion codage; Codage interimage; Filtre transversal; Distorsion signal
Publisher: GRETSI, Saint Martin d'Hères, France
Date: 1988

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