boundary of diphone

[Xiao Z]

According to the video, we should choose the mid-phone point as the boundary. I’m just wondering whether every diphone contains the whole consonant waveform and the half-cut vowel waveform. For example, kak, the first diphone is (k)+(half a) or (half k)+(half a)? Logically I think it should be (whole k)+(half a) since the stop contains first silence and second burst with some aspiration. So how to explain the half-cut(mid-phone point)?

[Simon]

We have joins in consonants too. So in the example /k ae t/, the diphones would be

sil_k k_ae ae_t t_sil

where sil is “silence” and is just another phoneme.

You correctly spot that we might not want the place the cut point at exactly the centre (50% point) in all cases. In the case of stops, we will make the join in the closure portion.

[Author]

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