2005078020 A1 abstract a simple to implement sample rate conversion system consisting of an input output data flow controller interpolation coefficient generation and output data flow control to generate the converted data stream sample rate conversion may be done at real time video rates without restrictions on the conversion ratios application_number US 92888704 A description assume the spacing between two adjacent input signals 301 and 302 is m and the spacing between two adjacent output signals 303 and 304 is n as shown in fig3 the number of output pixels produced between two adjacent input pixel x and pixel x 1 is x 1 m mod n u2212 xm mod n let a counter for input pixels be i and count it up by m for each input pixel if i is larger than or equal to n there is one output pixel between the input pixel and the previous pixel here the two nearest input signals are determined then subtract m from i if i is still larger than or equal to n there is another output pixel continue this until i becomes smaller than n then move to the next input pixel the distance between the output pixel and the nearest two input pixels can be expressed by simple numerical array since the first output pixel is at the same location as the first input pixel f p 0 the distance between the 0th output pixel and the previous input pixel is 0.