Apparatus for encoding a video signal employing a hierarchical i

Television – Bandwidth reduction system – Data rate reduction

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348396, H04N 732

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active

056233108

ABSTRACT:
An apparatus for encoding a video signal comprises a processor for extracting chrominance levels for pixels in a current image frame of the video signal to generate a current chrominance image and for segmenting the generated image into a plurality of current chrominance regions to provide contour and texture information of each segmented current chrominance region; a block for deriving errors between a mean chrominance level of each segmented current chrominance region and that of each of its previous segmented chrominance regions and selecting one of the segmented previous chrominance regions which yields a minimum error to produce motion information denoting the selected segmented previous chrominance region and information representing a mean level difference between the segmented current and the selected segmented previous chrominance regions; a processor for extracting a segmented luminance region having luminance levels which corresponds to each segmented current chrominance region from the current image frame and for sub-segmenting the extracted region into a multiplicity of regions to produce contour and texture information for each sub-segmented luminance region; and a block for coding the contour information, the motion information and the difference information for each segmented current chrominance region, and the contour and texture information for each sub-segmented luminance region.

REFERENCES:
patent: 5204920 (1993-04-01), Moran et al.
patent: 5465118 (1995-11-01), Hancock et al.
patent: 5506621 (1996-04-01), Ogasawara et al.

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