Now showing items 1-20 of 167

  • A bit more on the ability of adaptation of speech signals 

    Ballesteros, Dora Maria; Moreno Aróstegui, Juan Manuel (2013-03)
    Article
    Open Access
    Some traditional digital signal processing techniques encompass enhancement, filtering, coding, compression, detection and recognition. Recently, it has been presented a new hypothesis of signal processing known as the ...
  • 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 ...
  • Actividades en tratamiento de voz del Grupo de Procesado de Señal 

    Hernando Pericás, Francisco Javier (Escola Tècnica Superior d'Enginyers de Telecomunicació de Barcelona, 1993)
    Article
    Open Access
  • Adaptation of voice sever to automotive environment 

    Salinas Vila, David (Universitat Politècnica de Catalunya, 2009-10-26)
    Master thesis
    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 2010 Evaluation campaign: speaker diarization 

    Zelenak, Martin; Schulz, Henrik; Hernando Pericás, Francisco Javier (2010)
    Conference lecture
    Open Access
    In this paper we present the evaluation results for the task of speaker diarization in broadcast news domain as part of the Albayzin 2010 evaluation campaign of language and speech technologies. The evaluation data was ...
  • Alias assignment in information extraction 

    Sapena Masip, Emilio; Padró, Lluís; Turmo Borras, Jorge (-, 2007-01-31)
    Conference report
    Restricted access - publisher's policy
    This paper presents a general method for alias assignment task in information extraction. We compared two approaches to face the problem and learn a classifier. The first one quantifies a global similarity between the alias ...
  • Almacenamiento en nodos de redes inalámbricas de sensores 

    Pérez Rodríguez, Iria (Universitat Politècnica de Catalunya, 2013-01-21)
    Master thesis (pre-Bologna period)
    Open Access
    [ANGLÈS] The aim of this project is to store data inside a Wireless Sensor Network node, in order to transmit it when the conditions are favourable, using a certain hardware and software stack. This necessity comes from ...
  • 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 Access
    In 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, ...
  • An HMM-Based Approach to the INTERSPEECH 2011 Speaker State Challenge 

    Nogueiras Rodríguez, Albino (2011)
    Conference lecture
    Restricted access - publisher's policy
    The current main trend in paralinguistic information recognition is the so-called static classification. In this kind of classification the low level descriptors are pooled togethr by means of statistical functionals ...
  • An ultra low-power hardware accelerator for automatic speech recognition 

    Yazdani Aminabadi, Reza; Segura Salvador, Albert; Arnau Montañés, José María; González Colás, Antonio María (IEEE Press, 2016)
    Conference report
    Open Access
    Automatic Speech Recognition (ASR) is becoming increasingly ubiquitous, especially in the mobile segment. Fast and accurate ASR comes at a high energy cost which is not affordable for the tiny power budget of mobile devices. ...
  • Aplicación Android de movilidad de invidentes 

    Lidó Monzón, Ingrid (Universitat Politècnica de Catalunya, 2011-05-09)
    Bachelor thesis
    Open Access
    En este proyecto se ha desarrollado parte de una aplicación de movilidad de invidentes para Android. La introducción del destino se realiza por voz y a partir de ahí utilizando diversas herramientas se guía al usuario. A ...
  • APVQ encoder applied to wideband speech coding 

    Salavedra Molí, Josep; Masgrau Gómez, Enrique José (Institute of Electrical and Electronics Engineers (IEEE), 1996)
    Conference report
    Open Access
    The paper describes a coding scheme for broadband speech (sampling frequency 16 KHz). The authors present a wideband speech encoder called APVQ (adaptive predictive vector quantization). It combines subband coding, vector ...
  • AR modeling of the speech autocorrelation to improve noisy speech recognition 

    Hernando Pericás, Francisco Javier; Nadeu Camprubí, Climent (1992)
    Conference report
    Open Access
    Speech recognition in noisy environments remains an unsolved problem even in the case of isolated word recognition with small vocabularies. Recently, several techniques have been proposed to alleviate this problem. Concretely, ...
  • Asignación secuencial de canales para tráfico de voz y datos en entornos móviles celulares 

    Molina Castillo, Pilar (Universitat Politècnica de Catalunya, 2007-11-22)
    Master thesis (pre-Bologna period)
    Open Access
    En el siguiente documento se realizará un estudio sobre diferentes modelos de asignación de time slots (canales) en redes radio, con el fin de conseguir el mayor número consecutivo de time slots libres teniendo en cuenta ...
  • A spectral estimator of vocal jitter 

    Mas Soro, Pol (Universitat Politècnica de Catalunya, 2011-09-09)
    Master thesis (pre-Bologna period)
    Open Access
    Covenantee:  Université libre de Bruxelles
    English: The purpose of this thesis is to study and implement a spectral method for short-time jitter estimation. Jitter consists in rapid perturbations of the vocal cycle lengths, which can be observed from one cycle to ...
  • A speech enhancement system using higher order ar estimation in real environments 

    Salavedra Molí, Josep; Masgrau Gómez, Enrique José; Moreno Bilbao, M. Asunción (1993)
    Conference report
    Open Access
    We study some speech enhancement algorithms based on the iterative Wiener filtering method due to Lim-Oppenheim [2], where the AR spectral estimation of the speech is carried out using a second-order analysis. But in our ...
  • Audio classification experiments in a neonatal intensive care unit 

    Sólvez Pérez, Sergi (Universitat Politècnica de Catalunya, 2014-06-25)
    Master thesis (pre-Bologna period)
    Open Access
    [ANGLÈS] Newborns delivered at a gestational age of 24-32 weeks commonly have health problems. The use of a Neonatal Intensive Care Unit (NICU) is, in most of the cases, crucial for their survival. Nowadays, it is known ...