An Efficient Adaptive Window Size Selection Method for Improving Spectrogram Visualization

Algorithm 1

Complete algorithm.

Reqiure: Non-stationary input signal , Optimum threshold , Bandwidth of 1st filter ,

  Center frequency of 1st filter , Logarithmic growth factor , Number of filters

() procedure

()  PSD periodogram()

()  Normalized PSD /sum()

()   Expectation of (Equation (8))

()   Standard Deviation of (Equation (9))

()  if then             ▹ SIFT Selected

()   Window Size

()   Overlapping Region

()   FFT Points

()   Run STFT with , (Equation (1))

()  else             ▹ CQT Selected

()   Run CQT (Equation (6))

()   (Optional) User Defined Bins (Equation (12))

()  end if

() end procedure

() return Spectogram