Benvinguts al Repositori Digital de la UPF

Visualitzant Congressos (Departament de Tecnologies de la Informació i les Comunicacions) per data de publicació

Visualitzant Congressos (Departament de Tecnologies de la Informació i les Comunicacions) per data de publicació

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  • Farrús, Mireia; Anguita, Jan; Anguera Miró, Xavier, 1978-; Crego, Josep Maria; de Gispert, A.; Hernando, Javier; Nadeu Camprubí, Climent (2004)
    La visió actual de la societat de la informació gira fonamentalment al voltant de la llengua escrita. No obstant, és evident que la forma més natural i espontània de comunicació entre els éssers humans és la parla, i no ...
  • Anguera Miró, Xavier, 1978-; Farrús, Mireia; Hernando, Javier (2004)
    L'evolució de la societat de la informació ha esdevingut un incessant increment de continguts audiovisuals que s’emeten constantment en cadenes de televisió i emissores de radio locals i nacionals en llengua catalana. ...
  • Farrús, Mireia; Luque, Jordi; Morros, R.; Anguita, Jan; Macho, D.; Marqués, M.; Martínez, C.; Vilaplana, V.; Hernando, Javier (Universidad de Zaragoza, 2006)
    In this paper we present a person identification system based on a combination of acoustic features and 2D face images. We address the modality integration issue on the example of a smart room environment. In order to ...
  • Hernando, Javier; Farrús, Mireia; Ejarque, Pascual; Garde, Ainara; Luque, Jordi; Comunicació presentada a: SECRYPT 2006, International Conference on Security and Cryptography, celebrada a Setúbal, Portugal, del 7 al 10 d'agost de 2006 (INSTICC Press, 2006)
    Prosodic information can be used successfully for automatic speaker recognition, although most of the speaker recognition systems use only short-term spectral features as voice information. In this work, prosody information ...
  • Farrús, Mireia; Garde, Ainara; Ejarque, Pascual; Luque, Jordi; Hernando, Javier (International Speech Communication Association (ISCA), 2006)
    Comunicació presentada a: 9th International Conference on Spoken Language Processing; 17-21 de setembre de 2006 a Pittsburgh, Estats Units d'Amèrica
  • Farrús, Mireia; Ejarque, Pascual; Temko, Andrey; Hernando, Javier (Springer, 2007)
    It has been shown that prosody helps to improve voice spectrum based speaker recognition systems. Therefore, prosodic features can also be used in multimodal person verification in order to achieve better results. In this ...
  • Luque, Jordi; Morros, R.; Garde, I.; Anguita, Jan; Farrús, Mireia; Macho, D.; Marqués, F.; Martínez, C.; Vilaplana, V.; Hernando, Javier (Springer, 2007)
    In this paper, we address the modality integration issue on the example of a smart room environment aiming at enabling person identification by combining speech and 2D face images. First we introduce the monomodal audio ...
  • Cerdà, Ramon; Farrús, Mireia; Hernando, Javier; Veyrat Rigat, Montserrat (Dirección Xeral de Creación e Difusión Cultural, 2007)
    La presente comunicación no ofrece todavía resultados de ningún experimento ya ejecutado, sino, com su título indica, una serie de comentarios en torno a la noción de "campo de dispersión fonemática" (o "fonológica") o ...
  • Farrús, Mireia; Anguita, Jan; Hernando, Javier; Cerdà, Ramon (Dirección Xeral de Creación e Difusión Cultural, 2007)
    Los sistemas automáticos de reconocimiento de locutor más utilizados recientemente están basados en características acústicas de bajo nivel, como las magnitudes espectrales, las frecuencias de los formantes, etc. Sin ...
  • Farrús, Mireia (International Speech Communication Association (ISCA), 2007)
    Jitter and shimmer are measures of the cycle-to-cycle variations of fundamental frequency and amplitude, respectively, which have been largely used for the description of pathological voice quality. Since they characterise ...
  • Vicenç, Gómez; Kaltenbrunner, Andreas; López, Vicente (ACM Association for Computer Machinery, 2008)
    We analyze the social network emerging from the user comment activity on the website Slashdot. The network presents/ncommon features of traditional social networks such as a giant component, small average path length and ...
  • Lozano Solsona, Angel (Institute of Electrical and Electronics Engineers (IEEE), 2008)
    Expressions relating spectral efficiency, power and Doppler spectrum are derived for low-power Rayleighfaded wireless channels with proper complex signaling. No/nside information on the state of the channel is assumed at ...
  • Boutros, Joseph Jean; Zémor, Gilles; Guillén i Fàbregas, Albert; Biglieri, Ezio (Institute of Electrical and Electronics Engineers (IEEE), 2008)
    We show how to build full-diversity product codes under both iterative encoding and decoding over non-ergodic channels, in presence of block erasure and block fading. The concept of a rootcheck or a root subcode is introduced ...
  • Boutros, Joseph Jean; Zémor, Gilles; Guillén i Fàbregas, Albert; Biglieri, Ezio (Institute of Electrical and Electronics Engineers (IEEE), 2008)
    A new graph-based construction of generalized low density codes (GLD-Tanner) with binary BCH constituents is described. The proposed family of GLD codes is optimal on block erasure channels and quasi-optimal on block fading ...
  • Sezginer, Serdar; Sari, Hikmet; Biglieri, Ezio (Institute of Electrical and Electronics Engineers (IEEE), 2008)
    Multiple-input multiple-output (MIMO) techniques have become an essential part of broadband wireless communications systems. For example, the recently developed IEEE 802.16e specifications for broadband wireless access ...
  • Angelosante, Daniele; Biglieri, Ezio; Lops, Marco (Institute of Electrical and Electronics Engineers (IEEE), 2008)
    In this paper, we introduce a pilot-aided multipath channel estimator for Multiple-Input Multiple-Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) systems. Typical estimation algorithms assume the number of ...
  • Angelosante, Daniele; Biglieri, Ezio; Lops, Marco (Institute of Electrical and Electronics Engineers (IEEE), 2008)
    This paper aims at illustrating some applications of Finite Random Set (FRS) theory to the design and analysis of wireless communication receivers, and at pointing out similarities and differences between this scenario and ...
  • Biglieri, Ezio; Grossi, Emanuele; Lops, Marco; Tauste Campo, Adrià (Institute of Electrical and Electronics Engineers (IEEE), 2008)
    We study the minimum mean square error (MMSE) and the multiuser efficiency η of large dynamic multiple access communication systems in which optimal multiuser detection is performed at the receiver as the number and the ...
  • Angelosante, Daniele; Biglieri, Ezio; Lops, Marco (European Association for Signal Processing (EURASIP), 2008)
    This paper presents several algorithms for joint estimation of the target number and state in a time-varying scenario. Building on the results presented in [1], which considers estimation of the target number only, we ...
  • Farrús, Mireia; Costa-jussà, Marta R.; Poch, Marc; Hernández, Adolfo; Mariño Acebal, José B. (Universidad del País Vasco, 2008)
    Esta comunicación describe el desarrollo del traductor estadístico N-II entre catalán y castellano. Para mejorar la calidad del sistema, se llevó a cabo un riguroso análisis lingüístico. Este ha permitido plantear soluciones ...