Ivan Magrin-Chagnolleau and Geoffrey Durou.
Time-Frequency Principal Components of Speech: Application to Speaker Identification.
Proceedings of EUROSPEECH 99, Vol. 2, pp. 759-762, Budapest, Hungary, 1999.

Abstract: In this paper, we propose a formalism, called vector filtering
of spectral trajectories, which allows to integrate under a common formalism a
lot of speech parameterization approaches. We then propose a new filtering in
this framework, called time-frequency principal components (TFPC) of speech.
We apply this new filtering in the framework of speaker identification, using
a subset of the POLYCOST database. The results show an improvement of roughly
20% compared to the use of the classical cepstral coefficients augmented by
their Delta-coefficients.