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Time-domain speech enhancement using generative adversarial networks
(2019-11-01)
Article
Restricted access - publisher's policySpeech enhancement improves recorded voice utterances to eliminate noise that might be impeding their intelligibility or compromising their quality. Typical speech enhancement systems are based on regression approaches ... -
Exploring efficient neural architectures for linguistic-acoustic mapping in text-to-speech
(Multidisciplinary Digital Publishing Institute, 2019-08-17)
Article
Open AccessConversion from text to speech relies on the accurate mapping from linguistic to acoustic symbol sequences, for which current practice employs recurrent statistical models such as recurrent neural networks. Despite the ... -
Restricted Boltzmann machine vectors for speaker clustering and tracking tasks in TV broadcast shows
(Multidisciplinary Digital Publishing Institute, 2019-07-09)
Article
Open AccessRestricted Boltzmann Machines (RBMs) have shown success in both the front-end and backend of speaker verification systems. In this paper, we propose applying RBMs to the front-end for the tasks of speaker clustering and ... -
The AXIOM project: IoT on heterogeneous embedded platforms
(Institute of Electrical and Electronics Engineers (IEEE), 2019-11-11)
Article
Open AccessThe AXIOM project aims at providing an environment for Cyber-Physical Systems. Smart Video Surveillance targets public environments, involving real-time face detection in crowds. Smart Home Living targets home environments ... -
Extraction of the underlying structure of systematic risk from non-Gaussian multivariate financial time series using independent component analysis: Evidence from the Mexican stock exchange
(2018-01-01)
Article
Open AccessRegarding the problems related to multivariate non-Gaussianity of financial time series, i.e., unreliable results in extraction of underlying risk factors -via Principal Component Analysis or Factor Analysis-, we use ... -
Electron density retrieval from truncated Radio Occultation GNSS data
(2019-06-01)
Article
Open AccessThis paper summarizes the definition and validation of two complementary new strategies, to invert incomplete Global Navigation Satellite System Radio-Occultation (RO) ionospheric measurements, such as the ones to be ... -
Chatbol, a chatbot for the Spanish “La Liga”
(Springer, 2019-09-25)
Article
Restricted access - publisher's policyThis work describes the development of a social chatbot for the football domain. The chatbot, named chatbol, aims at answering a wide variety of questions related to the Spanish football league “La Liga”. Chatbol is deployed ... -
Dades, màquina i ètica
(2019-02-01)
Article
Open Access -
ADDTID: An alternative tool for studying earthquake/tsunami signatures in the ionosphere. Case of the 2011 Tohoku earthquake
(Multidisciplinary Digital Publishing Institute (MDPI), 2019-09-13)
Article
Open AccessTraveling Ionospheric Disturbances (ADDTID) algorithm. This algorithm automatically detects and characterizes Traveling Ionospheric Disturbances (TIDs) from Global Navigation Satellite System (GNSS) measurements. Applying ... -
Neural networks principal component analysis for estimating the generative multifactor model of returns under a statistical approach to the arbitrage pricing theory: Evidence from the mexican stock exchange
(2019-01-01)
Article
Open AccessA nonlinear principal component analysis (NLPCA) represents an extension of the standard principal component analysis (PCA) that overcomes the limitation of the PCA’s assumption about the linearity of the model. The NLPCA ... -
Chinese-Catalan: A neural machine translation approach based on pivoting and attention mechanisms
(2019-01-01)
Article
Open AccessThis article innovatively addresses machine translation from Chinese to Catalan using neural pivot strategies trained without any direct parallel data. The Catalan language is very similar to Spanish from a linguistic point ... -
Unemployment expectations: A socio-demographic analysis of the effect of news
(2019-10-01)
Article
Restricted access - publisher's policyIn this study, we evaluate the effect of news on consumer unemployment expectations for sixteen socio-demographic groups. To this end, we construct an unemployment sentiment indicator and extract news about several economic ...
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