Now showing items 1-20 of 123

    • 62: Una herramienta interactiva para el estudio del tratamiento de la señal 

      Mariño Acebal, José Bernardo; Vallverdú Bayés, Sisco (Universidad de las Palmas de Gran Canaria, 1994)
      Conference report
      Open Access
    • 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, Sisco (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 second opinion approach for speech recognition verification 

      Hernández-Ábrego, G; Mariño Acebal, José Bernardo (M,I, Torres & A. Sanfeliu / AERFAI, 1999)
      Conference report
      Open Access
      In order to improve the reliability of speech recognition results, a verifying system, that takes profit of the information given from an alternative recognition step is proposed. The alternative results are considered as ...
    • 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; ...
    • Albayzin speech database: design of the phonetic corpus 

      Moreno Bilbao, M. Asunción; Poig, D; Bonafonte Cávez, Antonio; Lleida, E; Llisterri, J; Mariño Acebal, José Bernardo; Nadeu Camprubí, Climent (. EUROSPEECH, 1993)
      Conference report
      Open Access
      This paper describes the phonetic content of Albayzin, a spoken database for Spanish designed for speech recognition purposes. A statistical study of a large sample of spontaneous speech is presented, and the phonetic and ...
    • 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