synthesis_tfsa

PURPOSE ^

SIGNAL SYNTHESIS

DESCRIPTION ^

 SIGNAL SYNTHESIS

 Estimates the time-domain signal from a given time-frequency distribution.


 The signal synthesis routine is limited to the following
 time-frequency distributions:
 
    (i)   Short-Time Fourier Transform (STFT)
    (ii)  Spectrogram
    (iii) Wigner-Ville Distribution

 PARAMETERS:

   TIME-FREQUENCY MATRIX

    Input matrix containing the time-frequency distribution.

   SIGNAL

       Output synthesised (complex) signal from given time-frequency distribution.

   WINDOW LENGTH

      Length of the smoothing window used in the given distribution (or in the case of
      of the WVD the lag window length).

   ANALYSIS TYPE

      Specifies which type of signal synthesis will be applied to the given TFD 
      matrix. The following analysis types are valid:

      (i) STFT:

         (a) Inverse Discrete Fourier Transform method.
         (b) Overlap-Add method.
         (c) Modified Short-Time Fourier Transform method.

      (ii) Spectrogram:

         Modified Spectrogram method

      (iii) Wigner Ville Distribution:

         Wigner Ville Distribution method. The original signal can be
         specified to correct the phase of the synthesised signal.



  See Also:  wvd, spec

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