• mean of wi+1 − recording min.f0 energy • per f0 This feature-set serves to capture the observed association between prosodic discontinuity and SU boundaries.
speakers tend to pause and lengthen SU-final tokens -hence the pause and phone duration features -and the pitch 'reset' between tokens either side of a boundary is likely to be more pronounced than elsewhere: hence the focus on differences with the following token and the SU minimum (Shriberg et al., 2000).