Patent ID: 6704758
Filing Date: 2004-03-09
Classification: H04N

Abstract:
A method for generating in real time a convergence correction curve F3(L) from a plurality of successive output data values (L) determined from a plurality of stored input sample values (M) smaller in number than said plurality of output data values, the method comprising the steps of:defining successive and overlapping interpolation intervals including a given number of said input sample values (e.g., Mâˆ’1, M, M+1; M, M+1, M+2); linearly interpolating said input sample values in each said interpolation interval to generate said output data values defining said convergence correction curve, said linear interpolating occurring over all of each said interpolating interval; emphasizing differently the influence of said given number of input samples during said linear interpolating; characterized by the steps of: calculating (step 402 through 406) a moving average of said output data values concurrently with said linear interpolating, but in successive spans (N) of said output data values leading and trailing each input sample value, each said span having fewer numbers of said output data values than are generated in each said interpolating interval, said output data values being modified by said moving average to impart smoothly varying incremental slopes to said convergence correction curve; and, adjusting said input sample values to configure said convergence correction curve.