Joint Dictionary Learning Using a New Optimization Method for Single-channel Blind Source Separation

Publication date: Available online 30 November 2018Source: Speech CommunicationAuthor(s): Linhui Sun, Keli Xie, Ting Gu, Jia ChenAbstractCross projection is often produced between sub-dictionaries when a mixed speech signal is represented over a joint dictionary in single-channel blind source separation (SCBSS), which leads to poor separation performance. To solve this problem, we introduce a new optimization function of joint dictionary learning for SCBSS, which trains the identity sub-dictionaries and common sub-dictionary simultaneously. The existence of a common sub-dictionary can effectively avoid one source signal being represented by the interferer sub-dictionaries. The new optimization function presented in this paper effectively inhibits the cross projection via enforcing constrai...

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