Rank: 138 based on 399 downloads (last 30 days) and 5 files submitted
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Alan Tan

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Multimedia University

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31 May 2010 Screenshot Speech Snipper This is a GUI that manages DSP analysis functions for wav-files (e.g., speech signals). Author: Alan Tan analysis, signal processing, dsp, audio processing, wav, video processing 52 6
  • 4.0
4.0 | 5 ratings
28 Apr 2008 Screenshot Hilbert-Huang Transform This submission is a realization of the Hilbert-Huang transform (HHT). Author: Alan Tan hilberthuang transfor..., video processing, signal processing, audio processing, frequency, nora 249 32
  • 4.71429
4.7 | 16 ratings
10 Jan 2008 Screenshot Sudoku! (v3.4) Sudoku! is the ultimate GUI for Sudoku fans. No messy scribbles, simply click away to the solution. Author: Alan Tan sudoku, hint, scribbles, gui, solve, games 33 4
  • 3.8
3.8 | 5 ratings
03 May 2007 Screenshot PitchWatch Get your pitch right with pitchwatch! Author: Alan Tan pitch, audio processing, video processing, frequency, music 36 3
  • 5.0
5.0 | 5 ratings
21 Jul 2006 PlayTune This function plays musical tunes. Write your own musical tune and call the function to play it. Author: Alan Tan sound, tunes, utilities, musical 29 2
  • 5.0
5.0 | 5 ratings
Comments and Ratings by Alan View all
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31 May 2010 Hilbert-Huang Transform This submission is a realization of the Hilbert-Huang transform (HHT). Author: Alan Tan

@Rakesh: Not sure what you meant with the 3d plot and vertical axis. Sorry.
@Hans: I have not experimented with files of .edf extension; I can't help much with that -- sorry.
31 May 2010 Speech Snipper This is a GUI that manages DSP analysis functions for wav-files (e.g., speech signals). Author: Alan Tan

Hi Jose, thanks for pointing out. I have, unwittingly, deleted the getcolormap.m function which was previously used with spectgray.m. Please remove Line 32 and use "colormap gray" in line 34, instead.
04 Jan 2010 Hilbert-Huang Transform This submission is a realization of the Hilbert-Huang transform (HHT). Author: Alan Tan

Hi Jaime, thank you for the comment.

From Matlab's help on the supplied hilbert.m function, it appears that there is no normalization involved. I had no particular reason on the choice of the figure colours -- you can always change the colour of the plot by modifying Line 25 of the plot_hht.m function.
16 Nov 2009 Hilbert-Huang Transform This submission is a realization of the Hilbert-Huang transform (HHT). Author: Alan Tan

The following reply is given to Agnes over email.

Hi Agnes, The 2 initial plots are the time-frequency plots of the HHT corresponding to the 2 IMFs with of the highest energy. Subsequent plots are the IMFs, plotted against time.
01 Apr 2009 Hilbert-Huang Transform This submission is a realization of the Hilbert-Huang transform (HHT). Author: Alan Tan

For the benefit of other readers, the following is the reply given to Yu over email.

Hi Yu, I am assuming the s you mentioned is output of the getspline function. The array s is formed by invoking Matlab's spline function, i.e., spline([0 p N+1],[0 x(p) 0],1:N). You'd note that additional endpoint conditions (loosely put, the spline should settle towards 0 at the endpoints) have been imposed as a means to contain the endpoints (of the resulting spline) to within reasonable bounds. Removing these conditions may result in the 'extreme peaks' you mentioned. I hope that clears your doubt.
Comments and Ratings on Alan's Files View all
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21 Dec 2012 Hilbert-Huang Transform This submission is a realization of the Hilbert-Huang transform (HHT). Author: Alan Tan junqua

30 Mar 2012 Hilbert-Huang Transform This submission is a realization of the Hilbert-Huang transform (HHT). Author: Alan Tan MISHRA, RAM KINKER

Alan Tan, I had a query in emd decomposition you have assigned 'SD=inf' but in my opinion instead of that sd should be calculated by using intermediate IMF from starting onwards.

26 Mar 2012 Hilbert-Huang Transform This submission is a realization of the Hilbert-Huang transform (HHT). Author: Alan Tan Deshpande, Jaidev

Hi Alan,

I have proposed to come up with a Python implementation of the HHT under the Google Summer of Code programme. But I'm worried about the patented status of the HHT.

I see many implementations of the HHT that are freely available, and a lot of research papers are based on HHT too. If the interest is purely academic and non-commercial, can HHT be used freely?

Please help me out.

Thanks
22 Mar 2012 Hilbert-Huang Transform This submission is a realization of the Hilbert-Huang transform (HHT). Author: Alan Tan dedenlaut

How to plot this result in energy-frequency-time domain?
08 Feb 2012 Hilbert-Huang Transform This submission is a realization of the Hilbert-Huang transform (HHT). Author: Alan Tan Andruschenko, Sergi

Top Tags Applied by Alan
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audio processing, video processing, gui, signal processing, analysis
Files Tagged by Alan View all
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Updated   File Tags Downloads
(last 30 days) 		Comments Rating
31 May 2010 Screenshot Speech Snipper This is a GUI that manages DSP analysis functions for wav-files (e.g., speech signals). Author: Alan Tan analysis, signal processing, dsp, audio processing, wav, video processing 52 6
  • 4.0
4.0 | 5 ratings
28 Apr 2008 Screenshot Hilbert-Huang Transform This submission is a realization of the Hilbert-Huang transform (HHT). Author: Alan Tan hilberthuang transfor..., video processing, signal processing, audio processing, frequency, nora 249 32
  • 4.71429
4.7 | 16 ratings
10 Jan 2008 Screenshot Sudoku! (v3.4) Sudoku! is the ultimate GUI for Sudoku fans. No messy scribbles, simply click away to the solution. Author: Alan Tan sudoku, hint, scribbles, gui, solve, games 33 4
  • 3.8
3.8 | 5 ratings
03 May 2007 Screenshot PitchWatch Get your pitch right with pitchwatch! Author: Alan Tan pitch, audio processing, video processing, frequency, music 36 3
  • 5.0
5.0 | 5 ratings
21 Jul 2006 PlayTune This function plays musical tunes. Write your own musical tune and call the function to play it. Author: Alan Tan sound, tunes, utilities, musical 29 2
  • 5.0
5.0 | 5 ratings

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