Image scaling apparatus for a multimedia system

Details Image scaling apparatus for a multimedia system Image scaling apparatus for a multimedia system

G - Physics

09

G

G09G 5/36 (2006.01) G06T 3/40 (2006.01)

Patent

CA 2059929

9-91-001 IMAGE SCALING APPARATUS FOR A MULTIMEDIA SYSTEM ABSTRACT OF THE DISCLOSURE An apparatus for scaling an image as represented by an arrangement of picture elements. The apparatus scales the image from a first size to a second size based upon plurality of scaling parameters which represent a desired scaling factor. The apparatus includes a scaler circuit which receives the plurality of scaling parameters and an image signal representing the arrangement of picture elements. The scaler circuit manipulates the arrangement of picture elements based upon the plurality of scaling parameters to provide a manipulated arrangement of picture elements. The manipulation includes performing different operations on subsets of the picture elements based upon the plurality of scaling parameters. The operations include a drop operation, which omits a pixel which is received by the scaler circuit, a keep operation, which keeps a pixel which is received by the scaler circuit, a dual operation, which averages two pixels which are received by the scaler circuit, and a quad operation, which averages four pixels which are received by the scaler circuit. The scaler circuit provides the manipulated arrangement of picture elements as a scaled image.

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