Filter banks with fixed time-frequency resolution, such as STFT, are a common tool for many audio analysis and processing applications allowing effective implementation via FFT. The major problem with STFT approach is a fixed time-frequency resolution. In this paper, we suggest adaptively varying STFT time-frequency resolution in order to reduce filter bank specific artifacts such as pre-echo while retaining adequate frequency resolution. Several strategies for systematic adaptation of time-frequency resolution are proposed. The introduced approach is demonstrated for problems of spectrograms display, noise reduction, and spectral effects processing.
Authors:
Lukin, Alexey; Todd, Jeremy
Affiliations:
iZotope, Inc.; Moscow State University(See document for exact affiliation information.)
AES Convention:
120 (May 2006)
Paper Number:
6717
Publication Date:
May 1, 2006
Session Subject:
Signal Processing; High Resolution Audio
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