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用于语音识别语音增强方面的matlab工具包

Version 0.1.0 (released 2003-11-05)

    * Initial release

Version 0.1.1 (released 2003-11-05)

    * Changed licence from GPL to LGPL

Version 0.2.0 (released 2004-07-28)

    * Implements unit tests to control the correctness of the library.
    * Other changes and improvements too many to list.

Version 0.2.1 (released 2005-05-16)

    * This release is mostly a maintenance release, with many small
      things changed.
    * New methods:
      - signal/deriv: Numerical derivative
      - signal/lt,reverse,sign: Counterparts of the regular functions
      - signal/subsasgn: Direct assignment of signal vector values,
        time values and sampling frequency
      - signal/interpolate: Linear interpolation of signal values
        between time points
      - signal/crossings: Detection of zero crossings. This may be
        used for detection of local minima and maxima as well. 
    * Unit tests have been extended and are more complete now.

Version 0.2.2 (released 2005-08-31)

    * Another maintenance release.
    * No new methods.
    * Functional changes:
      - DAP now uses a Hamming window by default.
      
Version 0.2.3 (released 2006-06-21)

    * A whole bunch of new methods and bugfixes. Please check the SVN
      repository for details.
    * Functionality of DAP quietly changed back to original.

Version 0.2.4 (released 2007-04-11)

    * Several new methods and bugfixes. A new release has been made to
      keep Matsig in sync with HUT Aparat.