Zero Crossing Rate
- Zero Crossing Rate
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Le Zero Crossing Rate (souvent utilisé sous sa forme abrégée ZCR) est le taux de changement de signe d'un signal. Le ZCR a beaucoup été utilisé en reconnaissance de la parole et en Recherche d'information musicale. Il est défini par:
où s est un signal de longueur T et 
est une fonction indicatrice qui vaut 1 si son argument A est vrai et vaut 0 sinon.
Références
- (en) Cet article est partiellement ou en totalité issu de l’article de Wikipédia en anglais intitulé « Zero-crossing rate » (voir la liste des auteurs)
- Fabien Gouyon, Francois Pachet, Olivier Delerue (2000), Classifying percussive sounds: a matter of zero-crossing rate? [1], in Proceedings of the COST G-6 Conference on Digital Audio Effects (DAFX-00), Verona, Italy, December 7-9, 2000. Accessed 26th April 2011.
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