Verfahren und Vorrichtung zum Bestimmen der Tonalitaet eines Audiosignals

The tonality of an audio signal is determined by a process with the following steps: - blockwise frequency transformation of a digital input signal x(n) to generate a real positive-value representation X(k) of the input signal, where k is the index of a frequency line, and - determination of the tonality T of the signal component at the frequency line k in accordance with the following equation: formula 1 where f<-1 is the filter function of a first digital filter having a first differentiating characteristic, where F<-2 is the filter function of a second digital filter having a second, flat or integrating characteristic or a characteristic which is weaker than the first characteristic, and where d<-1 and d<-2 are whole-integer constants which are selected as a factor of the filter parameters in such a way that any delay in the filter is compensated for.