Hybrid pitch extractor for speech utterances

This paper presents a new pitch detection algorithm similar to the Semiautomatic Pitch Detector (SAPD) in the sense that it initially calculates the pitch period with a time-domain principle cycle extractor. However, it differs from SAPD in that the pitch periods are not only calculated on time-domain, but are assured with an error detector. If there is any ambiguity, the pitch period will be re-calculated with the CEP algorithm. A `pitch selection logic' is used to select the pitch period from the two estimates. Experimental results show that the algorithm exhibits good performance in the five measurements proposed in [2]. The new algorithm runs at half the speed of the Data Reduction Method (DARD), but faster than the Modified Autocorrelation Method (AUTOC) and the Cepstrum Method in the order of four and eight times, respectively.