Optimal biorthogonal transform for colored noise suppression with subband Wiener filtering
Journal
IEEE Signal Processing Letters
Journal Volume
9
Journal Issue
5
Pages
154-156
Date Issued
2002
Author(s)
Lin, Y.-P.
Abstract
It is well-known that the Karhunen-Loeve transform (KLT) is optimal for white noise suppression. Recently, Akkarakaran and Vaidyanathan showed that for the case of colored noise, if both the noise and signal have a common KLT, then the KLT is optimal for subband noise suppression. In this paper, we will derive the optimal transform (not restricting to the class of unitary transforms) for the noise suppression problem when the signal and noise have arbitrary spectrum.
Subjects
Denoising; Filter bank; Noise suppression; Subband Wiener filter; Transform
Other Subjects
Mathematical transformations; Matrix algebra; Spectrum analysis; Spurious signal noise; Biorthogonal transforms; Signal filtering and prediction
Type
journal article