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| Paper: | SPTM-L4.2 |
| Session: | Stationary Signals and Spectral Analysis |
| Time: | Wednesday, May 19, 13:20 - 13:40 |
| Presentation: |
Lecture |
| Topic: |
Signal Processing Theory and Methods: Stationary Signals & Spectrum Analysis |
| Title: |
A MODIFIED CONSTANT-Q TRANSFORM FOR AUDIO SIGNALS |
| Authors: |
Cristiano Santos; Federal University of Rio de Janeiro | | |
| | Sergio Netto; Federal University of Rio de Janeiro | | |
| | Luiz Biscainho; Federal University of Rio de Janeiro | | |
| | Danillo Graziosi; Federal University of Rio de Janeiro | | |
| Abstract: |
This paper proposes a new transform for musical audio signals. The new transform, so-called modified constant-Q fast filter bank (mCQFFB), yields a log-like description in the frequency domain with improved frequency response when compared to the standard DFT. The improved frequency response of the mCQFFB is achieved by interpreting the sliding-DFT (sDFT) as a multi-stage filter bank, and substituting the sDFT basic filter in this description by a high-order filter with improved characteristics. The logarithm spectral scale of the mCQFFB is achieved by the adequate resampling of a chosen channel filter. We also discuss implementation issues related to the mCQFFB and exemplify its application to the analysis of musical signals. |
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