Title :
A method for time-frequency multirate filtering
Author :
Wada, S. ; Takahashi, N.
Author_Institution :
Dept. of Inf. Sci., Tokyo Denki Univ., Japan
Abstract :
A method for time-frequency multirate filtering of discrete-time signals is proposed. An input signal is nonuniformly decomposed into a number of subsignals, and the signals may be modified and combined on a specified time-frequency plane in real time processing. The modification process implies adaptive signal enhancement, filtering, movement and exchange over the time-frequency plane. The multirate filter is constructed based on parallel analysis and synthesis filter bank structures, and time-varying filtering may be achieved. By introducing a time-frequency plane and bifrequency maps, we formulate the multirate filters design completely. Design examples and experimental simulations are included
Keywords :
adaptive signal processing; band-pass filters; discrete time systems; filtering theory; signal synthesis; time-frequency analysis; time-varying filters; adaptive signal enhancement; bifrequency maps; discrete-time signals; experimental simulations; input signal; nonuniformly decomposed signal; parallel analysis filter bank structure; parallel synthesis filter bank structure; real time processing; subsignals; time-frequency multirate filtering; time-frequency plane; time-varying filtering; Band pass filters; Channel bank filters; Filter bank; Filtering; Fourier transforms; Signal processing; Signal representations; Signal synthesis; Tiles; Time frequency analysis;
Conference_Titel :
Time-Frequency and Time-Scale Analysis, 1996., Proceedings of the IEEE-SP International Symposium on
Conference_Location :
Paris
Print_ISBN :
0-7803-3512-0
DOI :
10.1109/TFSA.1996.546680
