Browsing by Author "Rodríguez Fonollosa, José Adrián"
Now showing items 1-20 of 128
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A baseline system for the transcription of catalan broadcast conversation
Schulz, Henrik; Rodríguez Fonollosa, José Adrián; Rybach, David (2009-09)
Conference lecture
Open AccessThe paper describes aspects, methods and results of the development of an automatic transcription system for Catalan broadcast conversation by means of speech recognition. Emphasis is given to Catalan language, acoustic ... -
A Catalan broadcast conversational speech database
Schulz, Henrik; Rodríguez Fonollosa, José Adrián (2009-09)
Conference lecture
Restricted access - publisher's policyData driven methods in speech and linguistic research, and system develoment require appropriate speech databases. A new Catalan speech database has been developed with a particular emphasis on broadcast conversational ... -
A comparison of several recent methods of fundamental frequency and voicing decision estimation
Rodríguez Fonollosa, José Adrián (H. TIMOTHY BRUMMELL, WILLIAM IDSARDI CITATION DELAWARE, NEW CASTLE, DELAWARE, 1996)
Conference report
Open AccessThe authors are interested in the comparison of several kinds of methods for fundamental frequency estimation and GCI (glottal closure instant) detection. These methods operate in various domains (time-, frequency- or joint ... -
A differentiable BLEU loss. Analysis and first results
Casas Manzanares, Noé; Rodríguez Fonollosa, José Adrián; Ruiz Costa-Jussà, Marta (2018)
Conference report
Open AccessIn natural language generation tasks, like neural machine translation and image captioning, there is usually a mismatch between the optimized loss and the de facto evaluation criterion, namely token-level maximum likelihood ... -
A MOOC on approaches to machine translation
Ruiz Costa-Jussà, Marta; Formiga, Lluís; Torrillas Tostado, Oriol; Petit Silvestre, Jordi; Rodríguez Fonollosa, José Adrián (2015-12-10)
Article
Open AccessThis paper describes the design, development, and analysis of a MOOC entitled “Approaches to Machine Translation: Rule-based, statistical and hybrid”, and provides lessons learned and conclusions to be taken into account ... -
A new algorithm for adaptive IIR filtering based on the log-area-ratio parameters
Rodríguez Fonollosa, José Adrián; Masgrau Gómez, Enrique José (Elsevier, 1990)
Conference report
Open Access -
A new subtree-transfer approach to syntax-based reordering for statistical machine translation
Khalilov, Maxim; Rodríguez Fonollosa, José Adrián; Dras, Mark (2009-05)
Conference lecture
Open AccessIn this paper we address the problem of translating between languages with word order disparity. The idea of augmenting statistical machine translation (SMT) by using a syntax-based reordering step prior to translation, ... -
A probabilistic method for blind multiuser detection using array observations
Antón Haro, Carles; Rodríguez Fonollosa, José Adrián; Rodríguez Fonollosa, Javier (IEEE, 1997)
Conference report
Open AccessIn this paper, a blind algorithm for detecting active users in a DS-CDMA system is presented. This probabilistic algorithm relies on the theory of hidden Markov models (HMM) and is completely blind in the sense that no ... -
Acoustic cancellation of engine noise by fast adaptive IIR filtering
Masgrau Gómez, Enrique José; Rodríguez Fonollosa, José Adrián (Elsevier, 1990)
Conference report
Open Access -
Adaptive blind equalization using weighted cumulant slices
Vidal Manzano, José; Rodríguez Fonollosa, José Adrián (Institute of Electrical and Electronics Engineers (IEEE), 1994)
Conference report
Open AccessMany linear methods have been proposed in the literature to blindly estimate the ARMA parameters of a time series using HOS. Nevertheless, they are mainly off-line and not much has been done in the adaptive case. The method ... -
Adaptive blind system identification using weighted cumulant slices
Vidal Manzano, José; Rodríguez Fonollosa, José Adrián (1996-03)
Article
Restricted access - publisher's policyMany linear methods have been proposed in the literature to blindly estimate the ARMA parameters of a time series using HOS. Nevertheless, they are mainly off-line and not much has been done in the adaptive case. The method ... -
Adaptive Multistage Vector Quantization
Rodríguez Fonollosa, José Adrián; Masgrau Gómez, Enrique José (1989)
Conference report
Open AccessThe authors present a novel multiple-stage vector-quantization method that allows the adaptation of the quantizer to the signal to be coded. This adaptation is computationally very simple and is made with no increase in ... -
Adaptive system identification based on higher-order statistics
Rodríguez Fonollosa, José Adrián; Masgrau Gómez, Enrique José (1991)
Conference report
Open AccessThe problem of estimating the autoregressive (AR) parameters of a causal AR moving average (ARMA) (p,q) process using higher-order statistic is addressed. It is shown that there is always a linear combination of p+1 slices ... -
An Ngram-based reordering model
Ruiz Costa-Jussà, Marta; Rodríguez Fonollosa, José Adrián (Elsevier, 2009-07)
Article
Restricted access - publisher's policyThis paper describes in detail a novel approach to the reordering challenge in statistical machine translation (SMT). This Ngram-based reordering (NbR) approach uses the powerful techniques of SMT systems to generate a ... -
Analisis estadistico de orden superior de la voz
Rodríguez Fonollosa, José Adrián; Moreno Bilbao, M. Asunción (1991)
Conference report
Open AccessMost of the speech analysis methods developed up to date have been based on the autocorrelation function or power spectrum, i. e., the second order statistics of the signa!. In this paper it is shown that higher order ... -
Analytic performance evaluation of cumulant-based arma system identification methods
Rodríguez Fonollosa, José Adrián; Vidal Manzano, José (IEEE IEEE PRESS, 1993)
Conference report
Open AccessThe authors perform an analytic study of some cumulant-based methods for estimating the AR parameters of ARMA processes. The analysis includes new AR identifiability results for pure AR process and the analytic performance ... -
Analytic performance evaluation of cumulant-based fir system identification methods
Rodríguez Fonollosa, José Adrián; Mendel, J M (IEEE IEEE PRESS, 1992)
Conference report
Open AccessThe covariances of the third- and fourth-order sample cumulants of stationary processes are derived. The resulting expressions are used to obtain the analytical performance of such methods as a function of the coefficients ... -
Application of hidden markov models to blind channel estimation and data detection in a gsm environment
Antón Haro, Carles; Rodríguez Fonollosa, José Adrián; Rodríguez Fonollosa, Javier (1996)
Conference report
Open AccessIn this paper, we present an algorithm based on the Hidden Markov Models (HMM) theory to solve the problem of blind channel estimation and sequence detection in mobile digital communications. The environment in which the ... -
Array joint detection for C/TDMA systems in UMTS environments
Antón Haro, Carles; Rodríguez Fonollosa, José Adrián; Rodríguez Fonollosa, Javier (Institute of Electrical and Electronics Engineers (IEEE), 1998)
Conference report
Open AccessTwo array-based schemes for intracell and intercell interference suppression are proposed. In both cases, the spatial and temporal characteristics of the propagation are jointly exploited by placing a narrowband beamformer ... -
Automatic and human evaluation study of a rule-based and a statistical Catalan-Spanish machine translation systems
Ruiz Costa-Jussà, Marta; Farrús Cabeceran, Mireia; Mariño Acebal, José Bernardo; Rodríguez Fonollosa, José Adrián (2011)
Conference report
Open AccessMachine translation systems can be classified into rule-based and corpus-based approaches, in terms of their core technology. Since both paradigms have largely been used during the last years, one of the aims in the ...