Third International Conference on Spoken Language Processing (ICSLP 94)

Yokohama, Japan
September 18-22, 1994

Pitch Extraction From Root Cepstrum

Hema A. Murthy

Department of Computer Science and Engineering, Indian Institute of Technology, Madras, India

In this paper we propose a new method of extracting pitch from voiced speech using the root cepstrum. Most algorithms for estimating system and source parameters from a signal (where the signal is mathematically defined as x(n) = e(n)*h(n) (e(n) represents the source and h(n) represents the system) attempt to transform the signal to a domain in which simple filtering operations can be applied to separate the system from the source. The algorithm that is proposed in this paper is one such approach. By applying an appropriate transformation on the spectrum of the signal, the root cepstrum is obtained. If the parameters are appropriately chosen a simple gating function can be used to separate the system frcm the source in the root cepstrum. The algorithm is tested on natural (both male and female) and noisy speech (male).

Full Paper

Bibliographic reference.  Murthy, Hema A. (1994): "Pitch extraction from root cepstrum", In ICSLP-1994, 1055-1058.