Title :
Nonlinear filtering of multiplied and convolved signals
Author :
Oppenheim, Alan V. ; Schafer, Ronald W. ; Stockham, Thomas G., Jr.
Author_Institution :
Massachusetts Institute of Technology, Cambridge, Massachusetts
fDate :
9/1/1968 12:00:00 AM
Abstract :
An approach to some nonlinear filtering problems through a generalized notion of superposition has proven useful In this paper this approach is investigated for the nonlinear filtering of signals which can be expressed as products or as convolutions of components. The applications of this approach in audio dynamic range compression and expansion, image enhancement with applications to bandwidth reduction, echo removal, and speech waveform processing are presented.
Keywords :
Bandwidth; Convolution; Dynamic range; Filtering; Image enhancement; Laboratories; Linear systems; Nonlinear filters; Nonlinear systems; Signal synthesis;
Journal_Title :
Audio and Electroacoustics, IEEE Transactions on
DOI :
10.1109/TAU.1968.1161990