Zero-crossing rate
Appearance
The zero-crossing rate is the rate of sign-changes along a signal. This feature has been used heavily in both speech recognition and music information retrieval and is defined formally as
where is a signal of length and the indicator function is 1 if its argument is true and 0 otherwise.
For monophonic tonal signals, the zero-crossing rate can be used as a primitive pitch detection algorithm.
See also
References
- Fabien Gouyon, Francois Pachet, Olivier Delerue (2000), On the Use of Zero-Crossing Rate for an Application of Classification of Percussive Sounds, in Proceedings of the COST G-6 Conference on Digital Audio Effects (DAFX-00), Verona, Italy, December 7-9, 2000. Accessed 7th Oct 2006.