Homomorphic Pitch Detection
Douglas B. Paul · 1978
Abstract : This note describes a homomorphic pitch detector which yields good performance on clear speech and moderate robustness to additive broadband noise, narrowband noise, and to degradation by a telephone simulator. It achieves the performance by the use of an adaptive time window, log-spectral windowing, an adaptive voicing threshold, and pitch track smoothing. It has been implemented in a real-time LPC vocoder for testing. Finally, a pilot study of a preprocessor to improve the performance of any coherence seeking pitch detector is presented.