Now showing items 21-40 of 113

  • Automatic database acquisition software for ISDN PC cards and analogue boards 

    Rodríguez Fonollosa, José Adrián; Moreno Bilbao, M. Asunción (1998)
    Conference report
    Open Access
    This paper describes an application for automatic speechdatabases acquisition (ADA) developed by the authors in the framework of the EC Telematics Project SpeechDat II. The software is able to work with standard inexpensive ...
  • Automatic speech recognition with deep neural networks for impaired speech 

    España-i-Bonet, Cristina; Rodríguez Fonollosa, José Adrián (Springer, 2016)
    Conference report
    Open Access
    Automatic Speech Recognition has reached almost human performance in some controlled scenarios. However, recognition of impaired speech is a difficult task for two main reasons: data is (i) scarce and (ii) heterogeneous. ...
  • AVPC-Subband Coding System for Speech Encoding 

    Masgrau Gómez, Enrique José; Mariño Acebal, José Bernardo; Rodríguez Fonollosa, José Adrián; Salavedra Molí, Josep (1987)
    Conference report
    Open Access
    The combination of Vector Quantization (VQ) and predictive techniques -named AVPC systems- has been shown as interesting systems for speech waveform coding at medium-high rates (ref. 1 to 3). In this work we present a such ...
  • BERT masked language modeling for co-reference resolution 

    Alfaro, Felipe; Ruiz Costa-Jussà, Marta; Rodríguez Fonollosa, José Adrián (2019)
    Conference report
    Open Access
    This paper explains the TALP-UPC participation for the Gendered Pronoun Resolution shared-task of the 1st ACL Workshop on Gender Bias for Natural Language Processing. We have implemented two models for mask language modeling ...
  • Blind channel estimation and data detection using hidden Markov models theory 

    Antón Haro, Carles; Rodríguez Fonollosa, José Adrián; Rodríguez Fonollosa, Javier (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1997-01-01)
    Article
    Open Access
    In this correspondence, we propose applying the hidden Markov models (HMM) theory to the problem of blind channel estimation and data detection. The Baum–Welch (BW) algorithm, which is able to estimate all the parameters ...
  • Blind multiuser deconvolution in fading and dispersive channels 

    Rodríguez Fonollosa, Javier; Rodríguez Fonollosa, José Adrián; Zvonar, Z; Vidal Manzano, José (. S.N., 1995)
    Conference report
    Open Access
    An adaptive near-far resistant technique for the blind joint multiuser identification and detection in asynchronous CDMA systems is analyzed in fading and dispersive GSM channels.
  • Blind multiuser detection using hidden markov models theory 

    Antón Haro, Carles; Rodríguez Fonollosa, José Adrián; Rodríguez Fonollosa, Javier (BOB WERNER IEEE, 1996)
    Conference report
    Open Access
    We present an adaptive algorithm based on the theory of hidden Markov models (HMM) which is capable of jointly detecting the users in a DS-CDMA system. The proposed technique is near-far resistant and completely blind in ...
  • Blind multiuser detection with array observations 

    Rodríguez Fonollosa, Javier; Zvonar, Z; Rodríguez Fonollosa, José Adrián; Catala, J (1998-01)
    Article
    Open Access
    Cochannel interference is usually a major limitation to the performance of mobile wireless systems. Examples of different forms of cochannel interference include multi-access interference in CDMA systems and cochannel ...
  • Blind multiuser detection with probabilistic algorithms - application to underwater communications 

    Antón Haro, Carles; Rodríguez Fonollosa, José Adrián; Zvonar, Zaran; Rodríguez Fonollosa, Javier (IEEE IEEE, 1997)
    Conference report
    Open Access
    In this paper, two probabilistic adaptive algorithms for jointly detecting active users in a DS-CDMA system are compared. The first one, which is based on the theory of hidden Markov models (HMM) is proposed within the ...
  • Blind multiuser identification and detection in cdma systems 

    Rodríguez Fonollosa, Javier; Rodríguez Fonollosa, José Adrián; Zvonar, Z; Vidal Manzano, José (Institute of Electrical and Electronics Engineers (IEEE), 1995)
    Conference report
    Open Access
    Multiuser detection in code division multiple access systems usually requires either knowledge of the transmitted signature sequences and channel state information or use of a known training sequence for adaptation. We ...
  • BUCEADOR, a multi-language search engine for digital libraries 

    Adell Mercado, Jordi; Bonafonte Cávez, Antonio; Cardenal, Antonio; Ruiz Costa-Jussà, Marta; Rodríguez Fonollosa, José Adrián; Moreno Bilbao, M. Asunción; Navas, Eva; Rodríguez Banga, Eduardo (2012)
    Conference lecture
    Open Access
    This paper presents a web-based multimedia search engine built within the Buceador (www.buceador.org) research project. A proof-of-concept tool has been implemented which is able to retrieve information from a digital ...
  • Byte-based neural machine translation 

    Ruiz Costa-Jussà, Marta; Escolano Peinado, Carlos; Rodríguez Fonollosa, José Adrián (Association for Computational Linguistics, 2017)
    Conference report
    Open Access
    This paper presents experiments compar- ing character-based and byte-based neural machine translation systems. The main motivation of the byte-based neural ma- chine translation system is to build multi- lingual neural ...
  • Character-based neural machine translation 

    Ruiz Costa-Jussà, Marta; Rodríguez Fonollosa, José Adrián (2016)
    Conference lecture
    Open Access
    Neural Machine Translation (MT) has reached state-of-the-art results. However, one of the main challenges that neural MT still faces is dealing with very large vocabularies and morphologically rich languages. In this paper, ...
  • Character-level intra attention networks for natural language inference 

    Yang, Han; Ruiz Costa-Jussà, Marta; Rodríguez Fonollosa, José Adrián (2017)
    Conference lecture
    Open Access
    Natural language inference (NLI) is a central problem in language understand- ing. End-to-end artificial neural networks have reached state-of-the-art performance in NLI field recently. In this paper, we propose Character- ...
  • Chinese-Catalan: A neural machine translation approach based on pivoting and attention mechanisms 

    Ruiz Costa-Jussà, Marta; Casas Manzanares, Noé; Escolano Peinado, Carlos; Rodríguez Fonollosa, José Adrián (2019-01-01)
    Article
    Open Access
    This 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 ...
  • Chinese–Spanish neural machine translation enhanced with character and word bitmap fonts 

    Ruiz Costa-Jussà, Marta; Aldón Mínguez, David; Rodríguez Fonollosa, José Adrián (2017-04-06)
    Article
    Open Access
    Recently, machine translation systems based on neural networks have reached state-of-the-art results for some pairs of languages (e.g., German–English). In this paper, we are investigating the performance of neural machine ...
  • Codificación de voz multipulso en tiempo real según recomendación GSM 6.10 

    Antón Haro, Carles; Rodríguez Fonollosa, José Adrián (Universidad de las Palmas de Gran Canaria, 1994)
    Conference lecture
    Open Access
  • Combining Length restrictions and N-Best Techniques in multiple-pas search strategies 

    Rodríguez Fonollosa, José Adrián (G. Olaszy, G. Németh, K. Erdohegyi, 1999)
    Conference report
    Open Access
  • Combining phrase and neural-based machine translation: what worked and did not 

    Ruiz Costa-Jussà, Marta; Rodríguez Fonollosa, José Adrián (2017)
    Article
    Restricted access - publisher's policy
    Phrase-based machine translation assumes that all words are at the same distance and translates them using feature functions that approximate the probability at different levels. On the other hand, neural machine translation ...
  • Correcting input noise in SMT as a char-based translation problem 

    Formiga Fanals, Lluís; Rodríguez Fonollosa, José Adrián (2012-10-31)
    External research report
    Open Access
    Misspelled words have a direct impact on the final quality obtained by Statistical Machine Translation (SMT) systems as the input becomes noisy and unpredictable. This paper presents some improvement strategies for translating ...