Abstract
AbstractIn many applications of filter banks, a low‐delay filter bank in which the system delay is small is desirable. In this paper, two new design methods are proposed for low‐delay perfect‐reconstruction filter banks. First, a design method is described for a two‐channel perfect‐reconstruction filter bank suitable for subband coding. In this method, a high‐pass filter for perfect reconstruction is designed for an arbitrary low‐pass filter. Next, a design method is described for an oversampling perfect‐reconstruction DFT filter bank suitable for subband adaptive filter. In this method, a prototype filter for a perfect‐reconstruction synthesizer is designed for the prototype filter for an arbitrary analyzer. The effectiveness of the present method is demonstrated by design examples. © 2001 Scripta Technica, Electron Comm Jpn Pt 2, 84(6): 30–39, 2001
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