Live Q&A Discussion - Time-Frequency Spectra with the S-transform
Lalu Mansinha - Watch Now!
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