DOI: https://doi.org/10.14710/jtsiskom.2020.13858

Sampled and Discretized of Short-time Fourier Transform and Non-negative Matrix Factorization: Single-Channel Source Separation

*Jans Hendry orcid scopus  -  Dept. of Electrical Engineering and Informatics, Vocational College, Universitas Gadjah Mada, Indonesia
Isnan Nur Rifai  -  Dept. of Electrical Engineering and Informatics, Vocational College, Universitas Gadjah Mada, Indonesia
Subari Subari  -  Dept. of Electrical Engineering and Informatics, Vocational College, Universitas Gadjah Mada, Indonesia
Received: 5 Aug 2020; Revised: 27 Oct 2020; Accepted: 27 Nov 2020; Published: 31 Jan 2021; Available online: 7 Dec 2020.
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Abstract
The Short-time Fourier transform (STFT) is a popular time-frequency representation in many source separation problems. In this work, the sampled and discretized version of it what’s called Discrete Gabor transform (DGT) is proposed to replace STFT within single-channel source separation problem of Non-negative Matrix Factorization (NMF) framework. The result shows that NMF-DGT is better than NMF-STFT according to Signal-to-Interference Ratio, Signal-to-Artifact Ratio, and Signal-to-Distortion Ratio in supervised scheme which are 18.60 dB vs 16.24 dB, 13.77 dB vs 13.69 dB, and 12.45 dB vs 11.16 dB as well as unsupervised scheme which are 0.40 dB vs 0.27 dB, -10.21 dB vs -10.36 dB, and -15.01 dB vs -15.23 dB, respectively.
Keywords: DGT; STFT; NMF; time-frequency representation; single-channel source separation

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