Computes the online Gabor expansion with Gabor coef. Wire data to the signal output to determine the polymorphic instance to use or manually select the instance.


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Inputs/Outputs

  • cbool.png reset? (F) —

    reset? specifies whether to clear the buffer for the online computation and use the new expansion info you specify. The default is FALSE.

  • c2dcdb.png Gabor coef —

    Gabor coef specifies the weights of the Gabor elementary functions.

  • ccclst.png expansion info —

    expansion info specifies the Gabor elementary functions to use for the Gabor expansion. The settings of expansion info take effect the first time you run this VI or when you set reset? to TRUE.

  • c1ddbl.png synthesis window —

    synthesis window specifies the window of the Gabor elementary functions. The size of synthesis window must be divided evenly by dM (time steps) and N (frequency bins).

  • ci32.png dM (time steps) —

    dM (time steps) specifies the time shift, in samples, between elementary functions. The time sampling interval of the signal in the time-frequency domain is dM (time steps)/fs, where fs is the sampling rate of the signal. National Instruments recommends that you set dM (time steps) to a power of 2.

  • ci32.png N (frequency bins) —

    N (frequency bins) specifies the number of frequencies of the Gabor elementary functions. The frequency sampling interval of the signal in the time-frequency plane is fs/N (frequency bins), where fs is the sampling rate of the signal. N (frequency bins) must be a power of 2.

  • cerrcodeclst.png error in (no error) —

    error in describes error conditions that occur before this node runs. This input provides standard error in functionality.

  • cdbl.png sampling rate —

    sampling rate specifies the sampling rate of the reconstructed signal in hertz. sampling rate must be greater than 0, or this VI sets sampling rate to 1 automatically.

  • imsdt.png signal —

    signal returns the reconstructed signal.

  • ierrcodeclst.png error out —

    error out contains error information. This output provides standard error out functionality.

    • Examples

    Refer to the following VIs for examples of using the TFA Online Gabor Expansion VI:

    • Online Noise Reduction VI: labview\examples\Time Frequency Analysis\TFAApplications
    • Voice Enhancement VI: labview\examples\Time Frequency Analysis\TFAApplications
    • Online Pitch Shifting VI: labview\examples\Time Frequency Analysis\TFAApplications