Real-time Implementation of a Class of Optimised Multirate Quadrature Mirror Filter Bank Using Genetic Algorithms
Gurvinder Singh Baicher (University of Wales Newport, United Kingdom)
Abstract: This paper considers theoretical issues concerning reconstruction errors and conditions for perfect reconstruction (PR) of the input signal for a 2-channel multirate quadrature mirror filter (QMF) bank. The main emphasis is on the optimisation of a new design of a perfect reconstruction QMF bank using infinite impulse response (IIR) filters based on transformation of variables technique. The genetic algorithm (GA) optimisation is used for the initial design of the QMF bank and for the IIR filters using finite word length coefficients. The optimised results are then applied to a real time digital signal processing kit. Finally, some test results for data compression achievable using different values of encoded bits are included.
Keywords: IIR filters, genetic algorithms, multirate filter bank, optimization, polyphase decomposition, pulse code modulation, quadrature mirror filter bank, real-time implementation
Categories: I.6.3, I.6.6, J.2