Real-time robust pitch detector

The authors propose a cumulant-based method to perform voice-unvoiced decision and pitch period estimation. The approach is based on the nature of excitation for different states of speech. The authors accomplished this goal by analyzing cumulant-related time sequences obtained via nonlinear processing of the speech signal. Experimental results indicating the performance of the proposed method, especially in the pitch estimation problem in which there are high power harmonics are presented.