论文信息 - A simple alias-free QMF system with near-perfect reconstruction

A simple alias-free QMF system with near-perfect reconstruction

This paper presents a design of prototype filters for quadrature mirror filter (QMF) banks. To minimize the value of reconstruction error for near-perfect reconstruction (NPR), linear optimization has been applied. Variable and combinational window functions with high side-lobe-fall-off-rate (SLFOR) have been used to design lowpass prototype filters. Use of window functions resulted in simple implementation. High SLFOR of combinational windows reduced the energy leakage due to aliasing from one sub-band to the other. The proposed optimization algorithm takes a few seconds on Pentium processor.

Rajiv Saxena | Alok Jain | Shashi Saxena

[1] K.M.M. Prabhu,et al. FIR digital filter design with variable parameter window families , 1988 .

[2] P. P. Vaidyanathan,et al. A Kaiser window approach for the design of prototype filters of cosine modulated filterbanks , 1998, IEEE Signal Processing Letters.

[3] Rajiv Saxena,et al. Design of FIR filters using variable window families: A comparative study , 2004 .

[4] Eduardo A. B. da Silva,et al. Digital Signal Processing: System Analysis and Design , 2002 .

[5] Robert Hooke,et al. `` Direct Search'' Solution of Numerical and Statistical Problems , 1961, JACM.

[6] P. P. Vaidyanathan,et al. Multirate digital filters, filter banks, polyphase networks, and applications: a tutorial , 1990, Proc. IEEE.

[7] James D. Johnston,et al. A filter family designed for use in quadrature mirror filter banks , 1980, ICASSP.