A MULTI-START ALGORITHM FOR SIGNAL ADAPTIVE SUBBAND SYSTEMS
David Taubman, Avideh Zakhor · 1992
There appears to be considerable motivation to investigate signal adaptive subband systems in which the polyphase transfer matrix is paraunitary, for application to still and motion image coding. This paper proposes a method of optimizing the filter coefficients of such systems using a mean-squared-ermr criterion. We have developed an efficient algorithm for locating numerous local op tima in the coefficient space,.permitting a degree of confidence in the location of globally optimal or near optimal solutions. We investigate both separable systems and a particular class of nonseparable filter systems. The application of our algorithm to a number of images is described.