Rank: 231 based on 349 downloads (last 30 days) and 5 files submitted
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Alan Tan

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Multimedia University

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Files Posted by Alan View all
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(last 30 days)
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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 audio processing, video processing, speech analysis, dsp, gui, analysis 45 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 audio processing, video processing, hilberthuang transfor..., signal processing, nora, audio 240 39
  • 4.8
4.8 | 22 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 games, gui, scribbles, hint, solve, sudoku 16 4
  • 3.8
3.8 | 5 ratings
03 May 2007 Screenshot PitchWatch Get your pitch right with pitchwatch! Author: Alan Tan audio processing, video processing, pitch, frequency, music 33 4
  • 5.0
5.0 | 6 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 15 2
  • 5.0
5.0 | 5 ratings
Comments and Ratings by Alan View all
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21 Apr 2014 Hilbert-Huang Transform This submission is a realization of the Hilbert-Huang transform (HHT). Author: Alan Tan

Hi Leon, thanks for pointing out. I tried findpeaks in the signal processing toolbox, and but it returned "No peaks found." Possibly, in the later versions (version I am using now is kinda old), the function has been corrected to locate the peak. Actually, I am not so concerned about the error because it only arises when there are instances of adjacent samples having exactly the same value on the left side of the peak, e.g., findpeaks([1 2 2.001 3 3 2 1]) returns the correct answer. In most cases, at least in the context of HHT/EMD or general signal processing, such occurrences are rare. Sorry I could not be more helpful.

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.

Comments and Ratings on Alan's Files View all
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13 Sep 2014 Hilbert-Huang Transform This submission is a realization of the Hilbert-Huang transform (HHT). Author: Alan Tan Le

09 Sep 2014 Hilbert-Huang Transform This submission is a realization of the Hilbert-Huang transform (HHT). Author: Alan Tan kai

Thanks!

01 Aug 2014 Hilbert-Huang Transform This submission is a realization of the Hilbert-Huang transform (HHT). Author: Alan Tan khanna, dimple

02 Jul 2014 Hilbert-Huang Transform This submission is a realization of the Hilbert-Huang transform (HHT). Author: Alan Tan lin

28 Jun 2014 Hilbert-Huang Transform This submission is a realization of the Hilbert-Huang transform (HHT). Author: Alan Tan Preda, Traian

Hi,

I have a question, regarding how I can identify in the last plot which frequencies are plotted in time?
Thank you

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