| 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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