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- José A. VALLEJO, Yurii VOROBIEV
- 2014

We describe an averaging procedure on a Dirac manifold, with respect to a class of compatible actions of a compact Lie group. Some averaging theorems on the existence of invariant realizations of Poisson structures around (singular) symplectic leaves are derived. We show that the construction of coupling Dirac structures (invariant with respect to locally… (More)

Accurate prediction of segmental duration from text in a text-to-speech system is difficult for several reasons. One specially relevant is the great quantity of contextual factors that affect timing and how to model them. There are many parameters that affect duration, but not all of them are always relevant. We present a complete environment in which to… (More)

- P. J. Moreno, M. Martinez, José Manuel Pardo, José A. Vallejo
- EUROSPEECH
- 1989

In this paper, we describe the development of a female voice in a Restricted-Domain Speech Synthesis System for Spanish. For the design of the database, we have used a greedy-algorithm approach that focus not only on covering a set of target phonemes, but also on mimicking the histogram of prosodic features from a larger database. For modeling the prosody,… (More)

- Ricardo de Córdoba, Juan Manuel Montero-Martínez, Juana M. Gutiérrez-Arriola, José A. Vallejo, Emilia Enríquez, José Manuel Pardo
- Computer Speech & Language
- 2002

Accurate prediction of segmental duration from text in a text-to-speech system is difficult for several reasons. One which is especially relevant is the great quantity of contextual factors that affect timing and it is difficult to find the right way to model them. There are many parameters that affect duration, but not all of them are always relevant and… (More)

We present a multi-speaker formant synthesizer based on parameter concatenation. The user can choose among three speakers, two males and one female. The synthesizer stores all the parameters for the basic speaker and linear transformation functions to synthesized the other two. The complete database for one speaker consists of 455 parameterized units… (More)

Several methods to improve multiple distant microphone (MDM) speaker diarization based on Time Delay of Arrival (TDOA) features are evaluated in this paper. All of them avoid the use of a single reference channel to calculate the TDOA values and, based on different criteria, select among all possible pairs of microphones a set of pairs that will be used to… (More)

- José A. Vallejo
- 2008

We introduce an n-ary Lie algebroid canonically associated to a Nambu-Poisson manifold. We also prove that every Nambu-Poisson bracket defined on functions is induced by some differential operator on the exterior algebra, and characterize such operators. Some physical examples are presented.

- José Antonio VALLEJO, Yury VOROBIEV
- 2017

On a foliated manifold equipped with an action of a compact Lie group G, we study a class of almost-coupling Poisson and Dirac structures, in the context of deformation theory and the method of averaging.

- José A. Vallejo
- 2006

Traditionally, the discussion about the geometrical interpretation of inertial forces is reserved for General Relativity handbooks. In these notes an analysis of the effect of such forces in a classical (newtonian) context is made, as well as a study of the relation between the precession of the Foucault pendulum and the holonomy on a surface, including… (More)