GREASY Load the 'greasy' test signal
Usage: s=greasy;
GREASY loads the 'greasy' signal. It is a recording of a woman
pronouncing the word "greasy".
The signal is 5880 samples long and recorded at 16 kHz with around 11
bits of effective quantization.
[sig,fs]=GREASY additionally returns the sampling frequency fs.
The signal has been scaled to not produce any clipping when
played. To get integer values use round(GREASY*2048).
The signal was obtained from Wavelab:
http://www-stat.stanford.edu/~wavelab/, it is a part of the first
sentence of the TIMIT speech corpus "She had your dark suit in greasy
wash water all year":
http://www.ldc.upenn.edu/Catalog/CatalogEntry.jsp?catalogId=LDC93S1.
Examples:
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Plot of 'greasy' in the time-domain:
plot((1:5880)/16000,greasy);
xlabel('Time (seconds)');
ylabel('Amplitude');
Plot of 'greasy' in the frequency-domain:
plotfftreal(fftreal(greasy),16000,90);
Plot of 'greasy' in the time-frequency-domain:
sgram(greasy,16000,90);
References:
S. Mallat and Z. Zhang. Matching pursuits with time-frequency
dictionaries. IEEE Trans. Signal Process., 41(12):3397--3415, 1993.
Package: ltfat