Kawahara et al. 1999 – STRAIGHT analysis

[Alex S]

Currently trying to understand how the STRAIGHT vocoder determines the F0 trace in the analysis phase.

The paper goes on to establish a fundamentalness, which is essentially an a prior distribution over the frequencies in a power spectrum. In the adjoining figure (Fig 11), it labels this fundamentalness distribution with the term “filter shape”. The paper unfortunately does not explicit define this and so, my question is the following:
What does the filter shape refer to? Judging from the diagram it does not represent the spectral envelope.

[Jonathan D]

They refer to the filter shape as ‘analysing wavelets’ in the text, and section 3.1 explains how they work.

[Alex S]

Thank you for your response. I am struggling to get what is explicitly meant by the ‘analysing wavelets’.

[Author]

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