Title :
Optimal biorthogonal transform for colored noise suppression with subband Wiener filtering
Author :
Phoong, See-May ; Lin, Yuan-Pei
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
fDate :
5/1/2002 12:00:00 AM
Abstract :
It is well-known that the Karhunen-Loeve transform (KLT) is optimal for white noise suppression. Akkarakaran and Vaidyanathan (see IEEE Trans. Signal Processing, vol.49, no.1, p.100-114, 2001) 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. We 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.
Keywords :
Karhunen-Loeve transforms; Wiener filters; channel bank filters; filtering theory; noise; KLT; Karhunen-Loeve transform; colored noise suppression; filter bank; optimal biorthogonal transform; optimal transform; subband Wiener filtering; subband noise suppression; unitary transforms; white noise suppression; Additive noise; Autocorrelation; Colored noise; Filter bank; Karhunen-Loeve transforms; Noise level; Noise reduction; Signal design; White noise; Wiener filter;
Journal_Title :
Signal Processing Letters, IEEE
DOI :
10.1109/LSP.2002.1009007
