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Subassembly for coding images with refresh correction of the data to be coded, and subassembly for decording signals representing these images and previously coded by means of a subassembly of the former kind
Subassembly for coding images with refresh correction of the data to be coded, and subassembly for decording signals representing these images and previously coded by means of a subassembly of the former kind
A coding subassembly for images composed of at least one moving pattern against a fixed or quasi-fixed background, including circuits for constructing a base model representative of the useful zone of the said images, a coding circuit, and an associated decoding subassembly. The model constructing circuits include circuits for initial calibration and adaptation of the model and a circuit for determining the movement of characteristic points taken from the useful zone and a circuit for selecting at least one zone of particular interest inside the useful zone and determining its movement. The coding circuit includes a circuit for coding output signals from the initial calibration circuit, and a circuit for correcting any shifts in luminance or chrominance in zones alongside the borders of the said zone(s) of interest observed on either side of these borders.
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