2020 >

Live Q&A Discussion - Time-Frequency Spectra with the S-transform

Lalu Mansinha - Watch Now - Duration: 27:30

Live Q&A Discussion with Lalu Masinha, following his talk titled 'Time-Frequence Spectra with the S-Transform'
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No comments or questions yet. Will you be the one who will break the ice?

16:59:49	 From  Michael Kirkhart : Was it just me, or did the talk get cut off early?
17:00:08	 From  Brewster LaMacchia : Yes, it cut off early
17:00:16	 From  Brewster LaMacchia : around 4:46
17:00:22	 From  Brewster LaMacchia : 43:46
17:00:26	 From  christophe Blouet : I missed the end, a bit after the bird
17:00:58	 From  Michael Kirkhart : Yes.  Unfortunately, he never got to show the results from using the S transform.
17:01:19	 From  Michael Kirkhart : Yep.  He was still showing the results from using the STFT.
17:03:59	 From  Brewster LaMacchia : while we were waiting I looked around for software and found the matlab link and this one: https://sourceforge.net/projects/fst-uofc/  Anything else available to try playing around with this (easily...)?
17:06:27	 From  Roberto : Question: In your presentation you said the ST transform gives the instantaneous frequency. Can you elaborate a bit more about the subject?
17:12:10	 From  Fredric Harris : Can use constant Q filter bank...optimum etector can be shown to have BW proportional to sqrt fo center frequency
17:13:54	 From  Fredric Harris : use constant q filter banks for analyzing dolphin and bat linear fm sweeps. 
17:14:18	 From  Leonard Dieguez : ltfat tool box has some wavelet transform tools
17:15:29	 From  Fredric Harris : for high snr linear predictive filter does opimum job estimating instantaneous frequency... we use that to cancle linear FM sweeps when we design automobile collision avoidance radars
17:16:27	 From  Fredric Harris : easy to do because interference signal is R-square, and detection signal is R-fourth
17:22:55	 From  Fredric Harris : gabor taught at Imperial college, His graduate student was Tony Constaninides... he told tony that men should not grow beards... that the best thinking time was the time in front of mirror while shaving... just fun trivia.  
17:24:34	 From  Arthur Lobo : Is there a CUDA implementation of N^2 ST for running on GPU?
17:26:01	 From  Michael Kirkhart : Here is a python implementation of the S-transform: https://github.com/claudiodsf/stockwell
17:26:52	 From  Arthur Lobo : CUDA is used for programming GPUs
17:27:03	 From  Michael Kirkhart : CUDA is the programming language for NVIDIA GPUS
17:27:05	 From  Arthur Lobo : NVIDIA GPUs
17:30:04	 From  Fred K. : Here is the Wikipedia link for Good-Thomas:
17:30:05	 From  Fred K. : https://en.wikipedia.org/wiki/Prime-factor_FFT_algorithm
17:30:20	 From  Michael Kirkhart : https://en.wikipedia.org/wiki/Prime-factor_FFT_algorithm