Recent Submissions

  • Design of a geosynchronous SAR system for water-vapour maps and deformation estimation 

    Monti Guarnieri, Andrea; Perletta, Luca; Rocca, Fabio; Scapin, Diego; Tebaldini, Stefano; Broquetas Ibars, Antoni; Ruiz Rodon, Josep (European Space Agency (ESA), 2011)
    Conference report
    Restricted access - publisher's policy
    In this paper, we propose a geosynchronous SAR concept that makes use of dual frequencies to achieve WIDE and SPOT coverage, aiming at continuous monitoring of deformation and generation of ...
  • Wideband-speech APVQ coding from 16 to 32 KBPS 

    Salavedra Molí, Josep (1997)
    Conference report
    Open Access
    This paper describes a coding scheme for broadband speech (sampling frequency 16KHz). We present a wideband speech encoder called APVQ (Adaptive Predictive Vector Quantization). It combines Subband Coding, Vector Quantization ...
  • Robust hos-based techniques applied to speech recognition and enhancement 

    Salavedra Molí, Josep; Hernando Pericás, Francisco Javier; Masgrau Gómez, Enrique José; Moreno Bilbao, M. Asunción (1995)
    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 ...
  • 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 ...
  • Implementation of cognitive radio networks to evaluate spectrum management strategies in real-time 

    Raschellà, Alessandro; Umbert Juliana, Anna (2016-04-01)
    Article
    Restricted access - publisher's policy
    This paper illustrates a Universal Software Radio Peripheral (USRP)-based real-time testbed that is able to evaluate different spectrum management solutions that exploit the Cognitive Radio (CR) paradigm. The main objective ...
  • Antipodally invariant metrics for fast regression-based super-resolution 

    Pérez-Pellitero, Eduardo; Salvador, Jordi; Ruiz Hidalgo, Javier; Rosenhahn, Bodo (2016-03-31)
    Article
    Open Access
    Dictionary-based super-resolution (SR) algorithms usually select dictionary atoms based on the distance or similarity metrics. Although the optimal selection of the nearest neighbors is of central importance for such ...
  • A contour-based approach to binary shape coding using a multiple grid chain code 

    Nunes, P; Marqués Acosta, Fernando; Pereira, F; Gasull Llampallas, Antoni (2000-05)
    Article
    Open Access
    This paper presents a contour-based approach to efficiently code binary shape information in the context of object-based video coding. This approach meets some of the most important requirements identified for the MPEG-4 ...
  • Region-based representations of image and video: segmentation tools for multimedia services 

    Salembier Clairon, Philippe Jean; Marqués Acosta, Fernando (1999-12)
    Article
    Open Access
    This paper discusses region-based representations of image and video that are useful for multimedia services such as those supported by the MPEG-4 and MPEG-7 standards. Classical tools related to the generation of the ...
  • Prediction of image partitions using Fourier descriptors: application to segmentation-based coding schemes 

    Marqués Truyol, Francisco; Gasull Llampallas, Antoni (1998-04)
    Article
    Open Access
    This paper presents a prediction technique for partition sequences. It uses a region-by-region approach that consists of four steps: region parameterization, region prediction, region ordering, and partition creation. The ...
  • Speaker verification on the polycost database using frequency filtered spectral energies 

    Hernando Pericás, Francisco Javier; Nadeu Camprubí, Climent (1998)
    Conference report
    Open Access
    The spectral parameters that result from filtering the frequency sequence of log mel-scaled filter-bank energies with a first or second order FIR filter have proved to be competitive for speech recognition. Recently, the ...

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