Patent ID: 7072528

Claim:
A cubic convolution interpolating apparatus comprising: an image signal divider dividing an image signal into a plurality of subblocks once as original image data; and a generating unit generating parameters which determine cubic convolution interpolation coefficients in units of the once divided subblocks, and performing cubic convolution interpolation on the original image data that is transmitted from the image signal divider, wherein the generating unit comprises: a forward scaling processor sampling a cubic convolution interpolated continuous function of the original image data transmitted from the image signal divider using a first scaling factor and scaling the original image data; a backward scaling processor sampling a backward cubic convolution interpolated continuous function of the scaled data output from the forward scaling processor using a second scaling factor and restoring the scaled data into the original image data; and a parameter optimizer optimizing the parameters using the original image data and the data restored into the original image data output from the backward scaling processor, and transferring the optimized parameters to the forward scaling processor and the backward scaling processor, respectively.