TY - GEN
T1 - Designing nearly tight window for improving time-frequency masking
AU - Kusano, Tsubasa
AU - Masuyama, Yoshiki
AU - Yatabe, Kohei
AU - Oikawa, Yasuhiro
N1 - Publisher Copyright:
© 2019 Proceedings of the International Congress on Acoustics. All rights reserved.
PY - 2019
Y1 - 2019
N2 - Many audio signal processing methods are formulated in the time-frequency (T-F) domain which is obtained by the short-time Fourier transform (STFT). The properties of the STFT are fully characterized by window function, number of frequency channels, and time-shift. Thus, designing a better window is important for improving the performance of the processing especially when a less redundant T-F representation is desirable. While many window functions have been proposed in the literature, they are designed to have a good frequency response for analysis, which may not perform well in terms of signal processing. The window design must take the effect of the reconstruction (from the T-F domain into the time domain) into account for improving the performance. In this paper, an optimization-based design method of a nearly tight window is proposed to obtain a window performing well for the T-F domain signal processing.
AB - Many audio signal processing methods are formulated in the time-frequency (T-F) domain which is obtained by the short-time Fourier transform (STFT). The properties of the STFT are fully characterized by window function, number of frequency channels, and time-shift. Thus, designing a better window is important for improving the performance of the processing especially when a less redundant T-F representation is desirable. While many window functions have been proposed in the literature, they are designed to have a good frequency response for analysis, which may not perform well in terms of signal processing. The window design must take the effect of the reconstruction (from the T-F domain into the time domain) into account for improving the performance. In this paper, an optimization-based design method of a nearly tight window is proposed to obtain a window performing well for the T-F domain signal processing.
KW - Discrete Gabor transform (DGT)
KW - Non-convex optimization
KW - Short-time Fourier transform (STFT)
KW - Speech enhancement
KW - Window design
UR - http://www.scopus.com/inward/record.url?scp=85089237018&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85089237018&partnerID=8YFLogxK
U2 - 10.18154/RWTH-CONV-239903
DO - 10.18154/RWTH-CONV-239903
M3 - Conference contribution
AN - SCOPUS:85089237018
T3 - Proceedings of the International Congress on Acoustics
SP - 2885
EP - 2892
BT - Proceedings of the 23rd International Congress on Acoustics
A2 - Ochmann, Martin
A2 - Michael, Vorlander
A2 - Fels, Janina
PB - International Commission for Acoustics (ICA)
T2 - 23rd International Congress on Acoustics: Integrating 4th EAA Euroregio, ICA 2019
Y2 - 9 September 2019 through 23 September 2019
ER -