Adaptive Scratch Noise Filtering

    Authors

    T. Kasparis;J. Lane

    Comments

    Authors: contact us about adding a copy of your work at STARS@ucf.edu

    Abbreviated Journal Title

    IEEE Trans. Consum. Electron.

    Keywords

    Engineering, Electrical & Electronic; Telecommunications

    Abstract

    An adaptive method for suppressing scratch (impulsive) noise from audio signals is proposed. The algorithm has been developed primarily for the restoration of old phonograph records, but it can also be used for other applications as well. Impulses are suppressed by selectively applying variable length median filtering to contaminated signal regions only, thus minimizing distortion of clean passages and loss of high musical frequencies. The median window length is adaptively adjusted depending on the number of samples in each contaminated signal region. For off-line processing, the algorithm is simple enough to be implemented on a personal computer equipped with an inexpensive sound board. Experiments with old recordings produced restored signals of dramatically improved sound quality. The restored audio signal can be played through the sound bo ard and stored onto an analog recording media such as high-quality cassette tapes.

    Journal Title

    Ieee Transactions on Consumer Electronics

    Volume

    39

    Issue/Number

    4

    Publication Date

    1-1-1993

    Document Type

    Article

    Language

    English

    First Page

    917

    Last Page

    922

    WOS Identifier

    WOS:A1993MM70900027

    ISSN

    0098-3063

    Share

    COinS