Independent component analysis for audio signal separation

Jens Wellhausen; Volker Gnann

doi:10.1117/12.631373

24 October 2005 Independent component analysis for audio signal separation

Jens Wellhausen, Volker Gnann

Proceedings Volume 6015, Multimedia Systems and Applications VIII; 60151I (2005) https://doi.org/10.1117/12.631373
Event: Optics East 2005, 2005, Boston, MA, United States

Abstract

In this paper an audio separation algorithm is presented, which is based on Independent Component Analysis (ICA). Audio separation could be the basis for many applications for example in the field of telecommunications, quality enhancement of audio recordings or audio classification tasks. Well known ICA algorithms are not usable for real-world recordings at the time, because they are designed for signal mixtures based on linear and over time constant mixing matrices. To adapt a standard ICA algorithm for real-world two-channel auditory scenes with two audio sources, the input audio streams are segmented in the time domain and a constant mixing matrix within a segment is assumed. The next steps are a time-delay estimation for each audio source in the mixture and a determination of the number of existing sources. In the following processing steps, for each source the input signals are time shifted and a standard ICA for linear mixtures is performed. After that, the remaining tasks are an evaluation of the ICA results and the construction of the resulting audio streams containing the separated sources.

Citation Download Citation

Jens Wellhausen and Volker Gnann "Independent component analysis for audio signal separation", Proc. SPIE 6015, Multimedia Systems and Applications VIII, 60151I (24 October 2005); https://doi.org/10.1117/12.631373

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