Now showing items 1-20 of 97

  • A comparative study of techniques for HMM-based noisy speech recognition in noisy car environment 

    Hernando Pericás, Francisco Javier; Nadeu Camprubí, Climent; Mariño Acebal, José Bernardo (Springer, 1993)
    Conference report
    Open Access
    The performance of existing speech recognition systems degrades rapidly in the presence of background noise when training and testing cannot be done under the same ambient conditions. The aim of this paper is to report the ...
  • A continuously adaptive vector predictive coder (AVPC) for speech encoding 

    Masgrau Gómez, Enrique José; Mariño Acebal, José Bernardo; Vallverdú Bayés, Francesc (Institute of Electrical and Electronics Engineers (IEEE), 1986)
    Conference report
    Open Access
    In this work we present a waveform speech coding system including vector quantization. This system can be seen as a vector version of the scalar ADPCM speech coder. In such system the speech samples are grouped in vectors ...
  • A direct approximation technique for designing digital equalizers with simultaneous specification of magnitude and phase 

    Mariño Acebal, José Bernardo; Figueiras Vidal, Aníbal R. (Georgi, 1978)
    Conference report
    Open Access
    A new direct method for designing nonrecursive and recursive digital equalizers approximating specified attenuation and phase responses is introduced . This method allows to control both magnitude and phase characteristics ...
  • A linear transform for spectral estimation 

    Lagunas Hernandez, Miguel A.; Figueiras Vidal, Aníbal R.; Mariño Acebal, José Bernardo; Carol Vilanova, Antonio (1981-10)
    Article
    Open Access
  • A suboptimum rank test for radar detection 

    Sanz González, José Luis; Figueiras Vidal, Aníbal R.; Mariño Acebal, José Bernardo (Universitat Politècnica de Catalunya (UPC), 1983)
    Conference report
    Open Access
    In this communication, a new nonparametric rank scheme is in traduced for Radar application and its performance briefly analyzed. The proposed scheme has a suboptimum character, since it is introduce as a simplification ...
  • Adaptación de impedancias mediante redes selectivas 

    Mariño Acebal, José Bernardo (1974-06)
    Article
    Open Access
  • Adaptive prediction and bit-assignment in subband coding of speech 

    Mariño Acebal, José Bernardo; Martí Ros, Jaume (1985)
    Conference report
    Open Access
    The combination of time-domain harmonic scaling (TDHS) and sub-band coding (SBC) provides an encoding approach which allows 9.6 Kb/s speech encoding with good communication quality. Starting from this structure, this paper ...
  • Adaptive vector predictive speech coding with sample by sample update at 16 Kbps 

    Masgrau Gómez, Enrique José; Mariño Acebal, José Bernardo (1986)
    Conference report
    Open Access
    A vectorial generalization of the ADPCM system is introduced. Once the speech signal is grouped in vectors, they are coded using a vector predictor (VP) and a vector quantizer (VQ). Both subsystems are continously adaptive; ...
  • An adaptive design of an all-zero spectral estimator 

    Lagunas Hernandez, Miguel A.; Figueiras Vidal, Aníbal R.; Mariño Acebal, José Bernardo (Institute of Electrical and Electronics Engineers (IEEE), 1981)
    Conference report
    Open Access
  • An adaptive gradient-search based algorithm for discriminative training of hmm's 

    Nogueiras Rodríguez, Albino; Mariño Acebal, José Bernardo; Monte Moreno, Enrique (Robert H. Mannel and Jordi Robert-Ribes, 1998)
    Conference lecture
    Restricted access - publisher's policy
    Although having revealed to be a very powerful tool in acoustic modelling, discriminative training presents a major drawback: the lack of a formulation guaranteeing convergence in no matter which initial conditions, such ...
  • An alternative approach to implement a recursive interpolation 

    Lagunas Hernandez, Miguel A.; Mariño Acebal, José Bernardo; Nadeu Camprubí, Climent; Figueiras Vidal, Aníbal R. (Institute of Electrical and Electronics Engineers (IEEE), 1981)
    Conference report
    Open Access
  • Aplicación del muestreo enfatizado a la evaluación de transmisiones digitales 

    Figueiras Vidal, Aníbal R.; Mariño Acebal, José Bernardo; Lagunas Hernandez, Miguel A.; García Gómez, Ramón (1980)
    Conference report
    Open Access
    The Importance Sampling Technique is a method for reducing the computational effort in Montecarlo simulations for obtaining the relative frequency of an event having a very low probability. While this method is well known ...
  • 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 Access
    Machine 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 ...
  • Automatic Segmentation of Spanish Speech Into Syllables 

    Mariño Acebal, José Bernardo (1989)
    Conference report
    Open Access
    This paper presents an algorithm that provides a syllabic segmentation of speech following the syllabification rules of Spanish language. The implemented algorithm is divided into two parts. First, an initial segmentation ...
  • 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 ...
  • Cohn's filters with parallel-coupled transmission lines and no discontinuities 

    Mariño Acebal, José Bernardo; de los Reyes, Elías; Masgrau Gómez, Enrique José (Warsaw University of Technology, 1980)
    Conference report
    Open Access
    A new method for designing Cohn's parallel-coupled transmission-line filters is introduced. This method is particularly well suited to obtain designs without discontinuities in the junction of the different transmission ...
  • Comments on and extensions of wolf's signal-to-channel noise formulas for delta-modulated systems 

    Figueiras Vidal, Aníbal R.; Mariño Acebal, José Bernardo; Lagunas Hernandez, Miguel A. (1980-01)
    Article
    Open Access
  • Comunicación oral con el computador 

    Nadeu Camprubí, Climent; Mariño Acebal, José Bernardo (1985-03)
    Article
    Open Access
    Concepts and techniques involved in speech communication with computers are reviewed. Although the speech output is, at present, closer to the computer ability than the speech understanding, at the moment only partial ...
  • Demisyllable based Spanish Number Recognition Experiments 

    Mariño Acebal, José Bernardo; Nadeu Camprubí, Climent; Lleida Solano, Eduardo (1987)
    Conference report
    Open Access
    The main features of our demisyllable based continuous speech recognition system (RAMSES) are showed. Special attention is paid to demisyllable definition and the syntactic constraints used with the dynamic programming ...
  • Design of bandstop filters by reactance transformation 

    Mariño Acebal, José Bernardo; Nadeu Camprubí, Climent; Masgrau Gómez, Enrique José (Institution of Electrical Engineers, 1980-01-31)
    Article
    Open Access