Title :
Lattice structures for optimal design and robust implementation of two-channel perfect-reconstruction QMF banks
Author :
Vaidyanathan, P.P. ; Hoang, Phuong-Quan
Author_Institution :
Dept. of Electr. Eng., California Inst. of Technol., Pasadena, CA, USA
fDate :
1/1/1988 12:00:00 AM
Abstract :
A lattice structure and an algorithm are presented for the design of two-channel QMF (quadrature mirror filter) banks, satisfying a sufficient condition for perfect reconstruction. The structure inherently has the perfect-reconstruction property, while the algorithm ensures a good stopband attenuation for each of the analysis filters. Implementations of such lattice structures are robust in the sense that the perfect-reconstruction property is preserved in spite of coefficient quantization. The lattice structure has the hierarchical property that a higher order perfect-reconstruction QMF bank can be obtained from a lower order perfect-reconstruction QMF bank, simply by adding more lattice sections. Several numerical examples are provided in the form of design tables
Keywords :
digital filters; filtering and prediction theory; optimisation; algorithm; analysis filters; coefficient quantization; design tables; lattice structure; numerical examples; optimal design; perfect reconstruction; quadrature mirror filter; robust implementation; stopband attenuation; Acoustic distortion; Algorithm design and analysis; Finite impulse response filter; Lattices; Low pass filters; Nonlinear distortion; Phase distortion; Quantization; Robustness; Transfer functions;
Journal_Title :
Acoustics, Speech and Signal Processing, IEEE Transactions on
