Title :
Realization of filter banks by means of wave digital filters
Author :
Fettweis, A. ; Leickel, T. ; Bolle, M. ; Sauvagerd, U.
Author_Institution :
Lehrstuhl fuer Nachrichtentech., Ruhr-Univ., Bochum, West Germany
Abstract :
Wave digital filters (WDFs) are derived from classical filters. They have very good properties with respect to coefficient accuracy requirements, stability, and dynamic range. One of the most attractive classes of WDFs are lattice WDFs (LWDFs), which can be used for filtering with sampling rate alteration and multirate filter banks in a very efficient way. The principles of LWDFs and LWDF filter banks are extended for polyphase and multidimensional WDFs and WDF filter banks. The following applications are presented: efficient coding of audio signals, in particular music signals; realization of a filter bank for real-time spectrum analysis; and realization of a 2-D filter bank with sector-shaped regions for efficient coding of images by decomposing these into several directional images
Keywords :
encoding; multidimensional digital filters; picture processing; signal processing; spectral analysis; two-dimensional digital filters; wave digital filters; 2D filter bank; LWDF; audio signal coding; classical filters; coefficient accuracy requirements; directional images; dynamic range; lattice WDF; multidimensional WDF filter banks; multirate filter banks; music signals; polyphase filters; real-time spectrum analysis; sampling rate; signal processing; stability; wave digital filters; Digital filters; Dynamic range; Filter bank; Filtering; Image coding; Lattices; Multidimensional systems; Multiple signal classification; Sampling methods; Stability;
Conference_Titel :
Circuits and Systems, 1990., IEEE International Symposium on
Conference_Location :
New Orleans, LA
DOI :
10.1109/ISCAS.1990.112134
