Title :
Efficient implementation of two-band PR-QMF filterbanks
Author :
Hezar, Rahmi ; Madisetti, Vijay K.
Author_Institution :
Center for Signal & Image Process., Georgia Inst. of Technol., Atlanta, GA, USA
fDate :
4/1/1998 12:00:00 AM
Abstract :
An oversampling technique that allows ternary (-1,0,1) filter coefficients is proposed for the implementation of two-band perfect reconstruction-quadrature mirror filter (PR-QMF) integer filterbanks. The optimization algorithm is based on the energy compaction. The resulting filterbank has two advantages: (i) the multiplier-free structure allows small VLSI area and low-power, and (ii) the filters use the whole given integer range leading to better objective performance compared to the previously published approaches.
Keywords :
FIR filters; VLSI; band-pass filters; circuit optimisation; filtering theory; quadrature mirror filters; signal reconstruction; signal sampling; FIR filters; comb filters; energy compaction; integer filterbanks; integer range; low-power; multiplier-free structure; objective performance; optimization algorithm; oversampling technique; perfect reconstruction-quadrature mirror filter; small VLSI area; ternary filter coefficients; two-band PR-QMF filterbanks; Circuits; Compaction; Digital filters; Filter bank; Finite impulse response filter; Hardware; Image reconstruction; Mirrors; Signal synthesis; Very large scale integration;
Journal_Title :
Signal Processing Letters, IEEE
