Enviaments recents

  • Robust beamforming for interference rejection in mobile communications 

    Riba Sagarra, Jaume; Goldberg, J; Vázquez Grau, Gregorio (1996)
    Text en actes de congrés
    Accés obert
    The problem of robust beamformer design in the presence of moving sources is considered. A new technique based on a generalization of the constrained minimum variance beamformer is proposed. The method explicitly takes ...
  • Motion compensated partition coding 

    Salembier Clairon, Philippe Jean (SPIE SPIE, 1996)
    Text en actes de congrés
    Accés obert
    This paper deals with the coding of the partition information resulting from the segmentation of video se quences Motion compensation of partition sequences is described as an e cient interframe mode of coding It involves ...
  • A cost function for the equalization of constant amplitude signals based on statistical reference 

    Sala Álvarez, José (1996)
    Text en actes de congrés
    Accés obert
    The equalization of constant amplitude signals is considered in the scope of this paper. A criterion based on the probability density function (pdf) of the signal of interest is proposed. The objective is to derive a ...
  • Generalized connected operators 

    Oliveras Vergés, Albert; Salembier Clairon, Philippe Jean (SMITH ANSARI, 1996)
    Text en actes de congrés
    Accés obert
    This paper deals with the notion of connected operators These operators are becoming popular in image processing because they have the fundamental property of simplifying the signal while preserving the contour information ...
  • Blind multiuser adaptive combining for asynchronous cdma systems 

    Muñoz Medina, Olga; Fernández Rubio, Juan Antonio (1996)
    Text en actes de congrés
    Accés obert
    This paper presents a novel technique to globally estimate and track the direction of arrival (DOA) of different users in an asynchronous CDMA system. The estimates are obtained exploiting the temporal structure of CDMA ...
  • Application of hidden markov models to blind channel estimation and data detection in a gsm environment 

    Antón Haro, Carles; Rodríguez Fonollosa, José Adrián; Rodríguez Fonollosa, Javier (1996)
    Text en actes de congrés
    Accés obert
    In this paper, we present an algorithm based on the Hidden Markov Models (HMM) theory to solve the problem of blind channel estimation and sequence detection in mobile digital communications. The environment in which the ...
  • Motion connected operators for image sequences 

    Salembier Clairon, Philippe Jean; Oliveras Vergés, Albert; Garrido Ostermann, Luis (1996)
    Text en actes de congrés
    Accés obert
    This paper deals with motion-oriented connected operators. These operators eliminate from an original sequence the components that do not undergo a specific motion (defined as a filtering parameter). As any connected ...
  • Text independent speaker identification on noisy envisorments by means of self organizing maps 

    Enric, Monte; Monte Moreno, Enrique; Adolf, A; Hernando Pericás, Francisco Javier (H. TIMOTHY BRUMMELL, WILLIAM IDSARDI CITATION DELAWARE, NEW CASTLE, DELAWARE, 1996)
    Text en actes de congrés
    Accés obert
    In this paper we propose a new architecture for speaker recognition. This architecture is independent of the text, robust with the presence of noise, and is based on the Self Organizing Maps (SOM) [1]. We compare the ...
  • Algorithms and structures for source separation based on the constant modulus property 

    Cerquides Bueno, Jose Ramon; Fernández Rubio, Juan Antonio (1996)
    Text en actes de congrés
    Accés obert
    We propose two structures and theirs associated algorithms designed to solve the blind source separation problem in the presence of noise and interferences. Both structures exploit the non convexity of the Constant Modulus ...
  • Second generation video coding schemes and their role in mpeg-4 

    Torres Urgell, Lluís (UNIVERSITÉ CATHOLIQUE DE LOUVAIN UNIVERSITÉ CATHOLIQUE DE LOUVAIN, 1996)
    Text en actes de congrés
    Accés obert
    Since its introduction in 1985, there has been a lot of activity in the eld of second generation still image coding. In the last years, the approach has been extended to video coding and has been the basis for European ...

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