• Integration of audiovisual sensors and technologies in a smart room 

    Neumann, J; Casas Pla, Josep Ramon; Macho Ciena, Dusan; Ruiz Hidalgo, Javier (2009-01)
    Article
    Accés obert
    At the Technical University of Catalonia (UPC), a smart room has been equipped with 85 microphones and 8 cameras. This paper describes the setup of the sensors, gives an overview of the underlying hardware and software ...
  • On the interaction between time and frequency filtering of speech parameters 

    Macho Ciena, Dusan; Nadeu Camprubí, Climent (Robert H. Mannel and Jordi Robert-Ribes, 1998)
    Text en actes de congrés
    Accés obert
    One of the great today's challenges in speech recognition is to ensure the robustness of the used speech representation. Usually, the recognition rate is strongly reduced when the speech is corrupted, e.g. by convolutional ...
  • Use of voicing information to improve the robustness of the spectral parameter set 

    Macho Ciena, Dusan; Nadeu Camprubí, Climent (ICSLP, 2000)
    Text en actes de congrés
    Accés obert
    Speech recognition systems that operate in real world environments have to be robust against additive noises. In this work, a technique that uses a voicing-dependent exponent in the computation of the filter-bank parameters ...