Title :
A new approach for subband processing
Author_Institution :
Thomson CSF Bagneux, Univ. de Paris Sud, France
Abstract :
Time-invariant digital filtering is a simple and powerful tool because addition and composition of filters give filters. Moreover, the discrete Fourier transform of the impulse response provides a representation which expresses composition of filters as a multiplication of their representations. This property is usually used for filter design. A recent multiresonant interpretation of two-channel filter banks is used to provide a framework for developing similar powerful tools for subband processing. A structure and a modular implementation of perfect reconstruction FIR two-channel filter banks with linear phase are described
Keywords :
digital filters; fast Fourier transforms; filtering and prediction theory; discrete Fourier transform; filter design; impulse response; linear phase; multiresonant interpretation; perfect reconstruction FIR; subband processing; time-invariant digital filtering; two-channel filter banks; Algorithm design and analysis; Channel bank filters; Digital filters; Discrete Fourier transforms; Filter bank; Filtering; Finite impulse response filter; Fourier transforms; Multiresolution analysis; Signal resolution; Signal synthesis;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1990. ICASSP-90., 1990 International Conference on
Conference_Location :
Albuquerque, NM
DOI :
10.1109/ICASSP.1990.115813
