Patent ID: 7548233

Claim:
An image scaling system for scaling video signal data between different formatted display devices, said image scaling system comprising: a video processing unit; an image scaling unit; a timing generator; and a remapping logic unit configured for: calculating a number of extra pixels based on a parameter by: calculating an expected number of input pixels based on a first format and calculating an expected number of output pixels based on a second format; calculating an input frame rate by multiplying an input clock cycle time by the expected number of input pixels; setting an output frame rate to the calculated input frame rate, wherein the output frame rate is a product of an output clock cycle time and a sum of the expected number of output pixels and the number of extra pixels; and calculating the number of extra pixels by dividing the input frame rate by the output clock cycle and subtracting the expected number of output pixels; and remapping at least one extra pixel to an offset position in at least one previous scan line, thereby eliminating the rendering of a short or a long scan line during image conversion between a first display device having the first format and a second display device having the second format.