Title :
A new implementation of arbitrary-length cosine-modulated filter bank
Author :
Gao, Xi-Qi ; He, Zhen-Ya ; Xia, Xiang-Gen
Author_Institution :
Dept. of Radio Eng., Southeast Univ., Nanjing, China
Abstract :
In this paper, the fast implementation of cosine-modulated filter bank (CMFB) is revisited. A class of paraunitary CMFBs with arbitrary length is considered. By further reorganizing of the polyphase component matrix and using the linear-phase property of the prototype filter, we obtain a more efficient implementation structure for the CMFB, in which we use 2×2 lossless matrices instead of 2×1 ones. In the new implementation, the number of two-channel lossless lattices is reduced by a factor of two
Keywords :
digital filters; filtering theory; lattice field theory; matrix algebra; 2×2 lossless matrices; arbitrary length; cosine-modulated filter bank; fast implementation; linear-phase property; paraunitary filter bank; polyphase component matrix; prototype filter; two-channel lossless lattices; Design engineering; Discrete cosine transforms; Discrete transforms; Filter bank; H infinity control; Helium; Lattices; Low pass filters; Nonlinear filters; Prototypes;
Conference_Titel :
Acoustics, Speech and Signal Processing, 1998. Proceedings of the 1998 IEEE International Conference on
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-4428-6
DOI :
10.1109/ICASSP.1998.681725
