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Lecture 4
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Voicing detection eg
An example of voicing detection
The voicing signal produced by using voicing.c to analyse joe.dat is shown in figure 5.1. If joe_voice.dat is used to mask joe_cepstral_f0.dat ( figure 4.11 ), by multiplying each sample of joe_cepstral_f0.dat by the corresponding sample of joe_voice.dat (using the program multiply.c ), the f0 signal in figure 5.2 is obtained.
Figure 5.1. Voicing of part of joe.dat
Sample number (× 104)
Figure 5.2. Cepstral f0 of part of joe.dat, masked by the voicing estimate
Sample number (× 104)
However, a different method of f0 estimation may give better results ...
Figure 5.3. f0 of part of joe.dat, estimated by the autocorrelation method, masked by the voicing estimate
Sample number (× 104)
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Email: enquiries@phon.ox.ac.uk | Tel: +44 1865 270444 | Fax: +44 1865 270445
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