Function: insdgtreal
INSDGTREAL  Inverse NSDGT for real-valued signals
  Usage:  f=insdgt(c,g,a,M,Ls);

  Input parameters:
        c     : Cell array of coefficients.
        g     : Cell array of window functions.
        a     : Vector of time positions of windows.
        M     : Vector of numbers of frequency channels.
        Ls    : Length of input signal.
  Output parameters:
        f     : Signal.

  insdgt(c,g,a,Ls) computes the inverse non-stationary Gabor transform
  of the input coefficients c.

  insdgt is used to invert the functions NSDGT and UNSDGT. Please
  read the help of these functions for details of variables format and
  usage.

  For perfect reconstruction, the windows used must be dual windows of the
  ones used to generate the coefficients. The windows can be generated
  using NSGABDUAL or NSGABTIGHT.



  References:
    P. Balazs, M. Doerfler, F. Jaillet, N. Holighaus, and G. A. Velasco.
    Theory, implementation and applications of nonstationary Gabor frames.
    J. Comput. Appl. Math., 236(6):1481--1496, 2011.
    

Url: http://ltfat.github.io/doc/nonstatgab/insdgtreal.html

See also: nsdgt, nsgabdual, nsgabtight, demo_nsdgt.

Package: ltfat