Sixth International Conference on Spoken Language Processing
October 16-20, 2000
A Synchrony Front-End Using Phase-Locked-Loop Techniques
Claudio Estienne, Patricia Pelle
University of Buenos Aires, School of Engineering, Argentina
We propose a new front-end that reflects some aspects of
auditory nerve response. Namely, the pattern of synchrony
responses observed over auditory nerve fibers associated with
F0, F1 and F2 of voiced sounds.
The main goal is to get a set of features, which represents those
frequency trajectories. These features should be less sensitive to
adverse environmental conditions than mel-cepstrum or Fourier
based front-ends. The core of the system is a computational
implementation of the well-known electronic device phase
locked loop (PLL). Outputs of a PLL bank interpolated and
conveniently resampled define our front-end coefficients.
Performance of the system was assessed in a vowels recognition
task using a common HMM back-end, and compared with the
performance of a mel-frequency cepstral coefficients (MFCC)
Estienne, Claudio / Pelle, Patricia (2000):
"A synchrony front-end using phase-locked-loop techniques",
In ICSLP-2000, vol.3, 98-101.