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Browsing Documents de Congressos by Subject "Processament de la parla"

Browsing Documents de Congressos by Subject "Processament de la parla"

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  • Alzheimer Disease Diagnosis based on Automatic Spontaneous Speech Analysis
    Lopez-de-Ipiña, Karmele; Alonso, Jesús B.; Solé-Casals, Jordi; Barroso, Nora; Faundez-Zanuy, Marcos; Ecay-Torres, Miriam; Travieso, Carlos M.; Ezeiza, Aitzol; Estanga, A. (2013)
    Alzheimer’s disease (AD) is the most prevalent form of progressive degenerative dementia and it has a high socio-economic impact in Western countries, therefore is one of the most active research areas today. Its diagnosis ...
  • Applications of Cumulants in Speech Processing
    Zaiats, Vladimir; Solé-Casals, Jordi; Martí i Puig, Pere; Reig Bolaño, Ramon (Springer, 2010)
    This paper analyzes applications of cumulant analysis in speech processing. The main focus is made on an integral representation for cUl1luJants using integrals involving cyclic products of kernels. These integrals serve ...
  • Automatic detection of laryngeal pathologies in running speech based on the HMM transformation of the nonlinear dynamics
    Travieso, Carlos M.; Alonso, Jesús B.; Orozco-Arroyave, J.R.; Solé-Casals, Jordi; Gallego Jutglà, Esteve (Springer, 2013)
    This work describes a novel system for characterizing Laryngeal Pathologies using nonlinear dynamics, considering different complexity measures that are mainly based on the analysis of the time delay embedded space. The ...
  • Coding of Biosignals Using the Discrete Wavelet Decomposition
    Reig Bolaño, Ramon; Martí i Puig, Pere; Solé-Casals, Jordi; Zaiats, Vladimir; Parisi Baradad, Vicenç (Springer, 2010)
    Abstract. Wavelet derived codification techniques are widespread used in image codifiers. The wavelet based compression methods are adequate for representing transients. In this paper we explore the use of the discrete ...
  • Feature extraction approach based on fractal dimension for spontaneous speech modelling oriented to alzheimer disease diagnosis
    Lopez-de-Ipiña, Karmele; Egiraun, Harkaitz; Solé-Casals, Jordi; Ecay-Torres, Miriam; Ezeiza, Aitzol; Barroso, Nora; Martinez-Lage, Pablo; Martinez de Lizardui, Unai (Springer, 2013)
    Alzheimer's disease (AD) is the most prevalent form of progressive degenerative dementia; it has a high socio-economic impact in Western countries. The purpose of our project is to contribute to earlier diagnosis of AD and ...
  • Mathematical Morphology Preprocessing to Mitigate AWGN Effects: Improving Pitch Tracking Performance in Hard Noise Conditions
    Martí i Puig, Pere; Solé-Casals, Jordi; Reig Bolaño, Ramon; Zaiats, Vladimir (Springer, 2010)
    Abstract. In this paper we show how a nonlinear preprocessing of speech signal -with high noise- based on morphological filters improves the performance of robust algorithms for pitch tracking (RAPT). This result happens ...
  • Nonlinear prediction based on score function
    Solé-Casals, Jordi; Monte-Moreno, Enric (2002)
    The linear prediction coding of speech is based in the assumption that the generation model is autoregresive. In this paper we propose a structure to cope with the nonlinear effects presents in the generation of the ...
  • Score Function for Voice Activity Detection
    Solé-Casals, Jordi; Martí i Puig, Pere; Reig Bolaño, Ramon; Zaiats, Vladimir (Springer, 2010)
    In this paper we explore the use of non-linear transformations in order to improve the performance of an entropy based voice activity detector (VAD). The idea of using a non-linear transformation comes from some ...
  • Source separation techniques applied to linear prediction
    Solé-Casals, Jordi; Jutten, Christian; Taleb, Anisse (2000)
    The prediction filters are well known models for signal estimation, in communications, control and many others areas. The classical method for deriving linear prediction coding (LPC) filters is often based on the minimization ...
  • Speech Enhancement: A Multivariate Empirical Mode Decomposition Approach
    Solé-Casals, Jordi; Gallego Jutglà, Esteve; Martí i Puig, Pere; Travieso, Carlos M.; Alonso, Jesús B. (Springer, 2013)
    Speech signals in real scenario ambient are usually mixed with some other signals, such as noise. This may interfere with posterior signal processing applied to the signals. In this work, a new technique of data denoising ...

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