Title :
A polyphase approach to time-varying filter banks
Author :
Phoong, See-May ; Vaidyanathan, P.P.
Author_Institution :
Dept. of Electr. Eng., California Inst. of Technol., Pasadena, CA, USA
Abstract :
We introduce a polyphase representation for linear time-varying (LTV) filters. Using the proposed polyphase approach, we are able to show some unusual properties of LTV filter bank (FB) that have not been pointed out before. The problem of interchangeability of analysis and synthesis banks is considered. Lossless TVFBs is studied in detail. Perfect reconstruction (PR) can always be obtained for lossless TVFBs. However, in general a PR lossless TVFB will only generate a tight frame
Keywords :
band-pass filters; filtering theory; signal reconstruction; signal representation; signal synthesis; time-varying filters; analysis filter banks; linear time-varying filters; lossless filter banks; perfect reconstruction; polyphase representation; synthesis filter banks; Channel bank filters; Delay; Filter bank; IIR filters; Image coding; Image reconstruction; Interpolation; Nonlinear filters; Speech coding; Transmission line matrix methods;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1996. ICASSP-96. Conference Proceedings., 1996 IEEE International Conference on
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3192-3
DOI :
10.1109/ICASSP.1996.544097
