Title :
Quadrature modulated filter banks
Author_Institution :
Dept. of Electron. Eng., City Polytech. of Hong Kong, Kowloon, Hong Kong
fDate :
30 May-2 Jun 1994
Abstract :
This paper proposes a new family of perfect reconstruction (PR) filter banks called quadrature modulated filter banks (QMFB) by imposing structural constraints in the polyphase matrix. The single stage orthonormal QMFB is a complete modulated version of the two channel conjugate quadrature filters (CQF) because it is identical to the CQF when M=2. More general cascade linear phase orthogonal and nonorthogonal PR systems are also derived. In particular, we are able to obtain more general orthogonal and nonorthogonal versions of the Lapped Orthogonal Transform (LOT)
Keywords :
Channel bank filters; Cities and towns; Discrete transforms; Filter bank; Finite impulse response filter; Image reconstruction; Mirrors; Nonlinear filters; Phase modulation; Prototypes;
Conference_Titel :
Circuits and Systems, 1994. ISCAS '94., 1994 IEEE International Symposium on
Conference_Location :
London
Print_ISBN :
0-7803-1915-X
DOI :
10.1109/ISCAS.1994.409035
