The echo effect due to late reverberation can severely degrade speech quality and intelligibility. Prior attempts to reduce this degradation in the modulation domain used time-invariant filtering. In this paper, we show that performing minimum mean squared error spectral estimation in the modulation domain (MDMMSE) can significantly reduce the severity of audible reverberation and enhance the l...

Resumen. En este trabajo se presenta el uso de Cloud Computing como infraestructura de un sistema de gestión del aprendizaje (LMS). El objetivo principal es que el sistema soporte la atención a cientos de alumnos bajo la modalidad de enseñanza e-Learning en una Institución de Educación Superior (IES). Algunas de las arquitecturas reportadas se especializan en otros LMS como Moodle, otras se enf...

In this paper we present a technique for the design of decentralized controllers for mean square stability of a large scale systemwith cascaded clusters of subsystems. Each subsystem is linear and time-invariant and both system and measurement are subject to Gaussian noise. For stability analysis of this system we consider the effects of AdditiveWhite Gaussian Noise (AWGN) channels used for exc...

Let { X, }z 1 be a sequence of independent Bernoulli random variables with probability p that Xi = 1 and probability 4 = 1 p that X, = 0 for all i 2 1. Time-invariant finite-memory (i.e., finite-state) estimation procedures for the parameter p are considered which take X,, . as an input sequence. In particular, an n-state deterministic estimation procedure is described which can estimate p with...

In this paper, we propose an algorithm that automatically detects and removes moving logos in video. The proposed algorithm consists of logo detection, tracking and extraction, and removal. In the logo detection step, we automatically detect moving logos using the saliency map and the scale invariant feature transform. In the logo tracking and extraction step, an improved mean shift tracking me...

Estimation of the instantaneous frequency and its derivatives is considered for a harmonic signal with a time-varying phase and time-invariant amplitude. The asymptotic minimax lower bound is derived for the mean squared error of estimation provided that the phase is an arbitrary m-times piece-wise differentiable function of time. It is shown that this lower bound is different only in a constan...

Successful execution of many robotic tasks requires precise control of robot motion and its interaction with the environment. In robotics these two problems are mainly studied separately in the domain of robot motion generation and interaction control, respectively. Existing approaches rely on two control loops: a motion generator (planner) that provides a reference trajectory in the outer loop...