Controlling a weighting filter based on the spectral content of a speech signal
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United States of America Patent
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Mar 7, 2006
Grant Date -
Aug 22, 2002
app pub date -
Sep 13, 2001
filing date -
Sep 15, 2000
priority date (Note) -
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Abstract
A method for preparing a speech signal for encoding comprises determining whether the spectral content of an input speech signal is representative of a defined spectral characteristic (e.g., a defined characteristic slope). A frequency specific filter component of a weighting filter is controlled based on the determination of the spectral content of the speech signal or/and its location in the encoder. A core weighting filter component of the weighting filter may be maintained regardless of the spectral content of the speech signal.
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