Title :
Pseudo-QMF banks with near-equiripple performance
Author :
Jayasimha, Sriram ; Hiremath, C.G.
Author_Institution :
Signion Syst. Ltd., Hyderabad, India
fDate :
1/1/1998 12:00:00 AM
Abstract :
A novel method using the Parks-McClellan equiripple design procedure obtains a linear-phase spectral factor of an equiripple approximate 2Mth-band lowpass filter. This filter, which is an equiripple prototype of an M-channel pseudo-QMF bank, is modified to make it a closer approximation of a linear-phase spectral-factor of a 2Mth-band filter, reducing the maximum overall reconstruction error to the order of the stopband ripple, while slightly compromising equiripple performance
Keywords :
band-pass filters; band-stop filters; delay circuits; error analysis; low-pass filters; quadrature mirror filters; signal reconstruction; spectral analysis; M-channel pseudo-QMF bank; Parks-McClellan equiripple design procedure; approximation; equiripple approximate 2Mth-band lowpass filter; equiripple prototype; linear-phase spectral factor; maximum overall reconstruction error; near-equiripple performance; pseudo-QMF banks; stopband ripple; Biomedical signal processing; Filter bank; Finite impulse response filter; Frequency response; IIR filters; Image reconstruction; Kernel; Multidimensional signal processing; Multidimensional systems; Speech processing;
Journal_Title :
Signal Processing, IEEE Transactions on
