Gradient Flow Convolutive Blind Source Separation

Michael Syskind Pedersen, Chinton Møller Nielsen

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    Experiments have shown that the performance of instantaneous gradient flow beamforming by Cauwenberghs et al. is reduced significantly in reverberant conditions. By expanding the gradient flow principle to convolutive mixtures, separation in a reverberant environment is possible. By use of a circular four microphone array with a radius of 5 mm, and applying convolutive gradient flow instead of just applying instantaneous gradient flow, experimental results show an improvement of up to around 14 dB can be achieved for simulated impulse responses and up to around 10 dB for a hearing aid application with real impulse responses.
    Original languageEnglish
    Title of host publicationProceedings of the 2004 IEEE Signal Processing Society Workshop (MLSP 2004)
    Publication date2004
    ISBN (Print)0-7803-8608-4
    Publication statusPublished - 2004
    EventIEEE Signal Processing Society Workshop (MLSP 2004) -
    Duration: 1 Jan 2004 → …


    ConferenceIEEE Signal Processing Society Workshop (MLSP 2004)
    Period01/01/2004 → …

    Bibliographical note

    Copyright: 2004 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE


    • microphone array
    • blind source separation
    • convolutive ICA
    • audio separation
    • Gradient flow


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