The need of ∆, ∆∆, ∆∆∆, ∆∆∆∆.... measures is a clear sign of the loss in the representation capability of classical frame-based analysis techniques. Mainly coarticulation effects in fluent speech are hidden and obscured by the classical short-time analysis technique. In fact, almost every acceptable ASR system is forced to introduce this kind of post-processing technique, in order to obviate to...
