In this paper a general structure for two-band filter banks with rational sampling factors is proposed to arbitrarily separate the audio spectrum. The authors extended a quadrature mirror filter (QMF) bank to unevenly decompose spectra into a specific ratio and then reconstructed them with negligible distortion. To achieve high-precision filter banks and reduce the implementation cost, the authors also integrated the rational filter banks with the frequency response masking (FRM) approach for the digital filter bank design. This procedure can be applied to filter banks with both integer and rational decimation factors.
Click to purchase paper as a non-member or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!
This paper costs $33 for non-members and is free for AES members and E-Library subscribers.