Harma Syllable Segmentation
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HARMASYLLABLESEG - Segments a signal stored in a WAV file into individual syllables. Also graphs the spectrogram and signal with syllables highlighted in red to show what parts of the signal contain syllables.
INPUT:
- FILENAME: The path to a signal stored in WAV format.
The following arguments are used by the spectrogram function type:
'help spectrogram' for more information on WINDOW,NOVERLAP, and NFFT
- WINDOW: Either an integer value N or coefficients of a Window function
stored in a length N matrix. If an integer is passed a default hamming
window of length N is used on each segment of the signal.
- NOVERLAP: Number of samples each segment of the signal overlaps.
- NFFT: Number of points used to calculate the DFT (discrete Fourier
transform) of each segment. This may be greater than the window length.
In this case, each segment is zero padded to the NFFT length.
- MINDB: Stopping criteria T (in dB) as defined in the original paper by Harma.
A good default value for this parameter is ~20 dB.
OUTPUT:
- SYLLABLES: A struct array. Each struct represents a single syllable and contains the following parameters:
- SIGNAL: An 1-dimensional array of doubles that represent the value of the signal over the range of this syllable.
The following fields are in the order:
[Peak Peak-1 Peak-2...Peak+1 Peak+2...]
- SEGMENTS: The spectrogram index of each segment in this syllable.
- TIME: The time domain values of this syllable.
- FREQS: Peak frequency found in each segment.
- AMPS: Amplitude each peak frequency
- FS: Sampling frequency of signal in the WAV file.
- S: The spectrogram of the signal in the WAV file.
- F: Frequency bins used in FFT.
- T: Time domain values of each segment in the spectrogram.
- P: Power spectral density of each segment in the spectrogram.
Usage Example:
[syllables,FS,S,F,T,P] = harmaSyllableSeg('[Path To WAV File]',kaiser(512),128,1024,20);
References:
1) Harma, A.; , "Automatic identification of bird species based on sinusoidal modeling of syllables," Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03). 2003 IEEE International Conference on , vol.5, no., pp. V- 545-8 vol.5, 6-10 April 2003
doi: 10.1109/ICASSP.2003.1200027
URL: http://ieeexplore.ieee.org/stamp/stamp.jsptp=&arnumber=1200027&isnumber=26996
2) Lee, C. H., "Automatic Recognition of Bird Songs Using Cepstral Coefficients" Journal of Information Technology and Applications, 2006. Vol. 1 No. 1. p. 17-23
URL: http://140.126.5.184/Jita_web/publish/vol1...44-text-sec.pdf
Free download from Shareware Connection - HARMASYLLABLESEG - Segments a signal stored in a WAV file into individual syllables.
Version: 1.0 | Size: 10 KB | Platform: Matlab, Scripts
Released Date: 24-04-2013 | Rating: 0 | Title: Harma Syllable Segmentation
Author Url: http://www.mathworks.com
Program Info Url: http://www.mathworks.com
Download Url: http://www.mathworks.com/matlabcentral/fx_files/29261/1/harmaSyllableSeg.zip
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