Whitening of filtering error using nonuniform sampling
James J. Clark · 2002
The author reports on a preliminary investigation into the use of nonuniform sampling systems for digital storage and transmission of data. It is shown that, by using a nonuniform sample sequence, with an appropriate anti-aliasing filter, one can whiten the spectrum of the filtering error as well as allow more high frequency information to be captured. The filtering error using this method, although randomized, may also be greater in magnitude than for the standard sampling and reconstruction process. Whether the noise level is increased unacceptably depends on the closeness of the matching of the signals to the sampling scheme. The idea is that, for some audio applications, the added random noise will be less objectionable than the muffling of the sound produced by standard sampling.>