5th European Conference on Speech Communication and Technology

Rhodes, Greece
September 22-25, 1997

A Modified Zero-Crossing Method for Pitch Detection in Presence of Interfering Sources

Francois Gaillard, Frederic Berthommier, Gang Feng, Jean-Luc Schwartz

Institut de la Communication Parlee, UPRESA 5009, Grenoble, France

This paper evaluates, in terms of speech signal processing, a non- linear method of pitch detection based on the detection of the zero- crossings of the signals (ZC method), in adverse conditions of interference. First, F0 identification is evaluated according to the relative level of energy between the components in mixtures of pure tones or pairs of vowels; then, we introduce in the double-vowel paradigm a confidence measure based on the standard deviation of inter-zero intervals. Finally, the robustness of this confidence measure is tested in two cases of interference : pure tones + noise, and vowels + noise. We show that the method allows to detect periodicity without any knowledge about the nature of the interfering sources, and then to identify their fundamental frequency.

Full Paper

Bibliographic reference.  Gaillard, Francois / Berthommier, Frederic / Feng, Gang / Schwartz, Jean-Luc (1997): "A modified zero-crossing method for pitch detection in presence of interfering sources", In EUROSPEECH-1997, 445-448.