Patent ID: 8073282

Claim:
A device comprising: a single scaling filter to filter a video signal once to perform both sharpening and scaling; a memory to store original scaling filter coefficients for the scaling filter; and an integrated circuit to calculate new sharpening-scaling filter coefficients derived from the original scaling filter coefficients and one of sharpening filter coefficients for a sharpening filter and a sharpening strength and to apply the new sharpening-scaling filter coefficients to the single scaling filter; wherein the single scaling filter filters the video signal according to z q = âˆ‘ i = - m 2 + 1 m 2 â¢ d i â¢ x âŒŠ q s âŒ‹ + i where x is the video signal; d i are the new sharpening-scaling filter coefficients; m denotes an even number of taps; s denotes the scaling ratio; q denotes a coordination index after scaling; and i is an index for a tap of the single scaling filter.