Repositorio Dspace

Listar por autor "Zaiats, Vladimir"

Listar por autor "Zaiats, Vladimir"

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  • A non-linear VAD for noisy environments
    Solé-Casals, Jordi; Zaiats, Vladimir (Springer, 2010)
    This paper deals with non-linear transformations for improving the performance of an entropy-based voice activity detector (VAD). The idea to use a non-linear transformation has already been applied in the field of ...
  • 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 ...
  • 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 ...
  • 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 ...
  • Non-Linear and Non-Conventional Speech Processing: Alternative Techniques
    Solé-Casals, Jordi; Zaiats, Vladimir; Monte-Moreno, Enric (Springer, 2010)
    This special issue aims to cover some problems related to non-linear and nonconventional speech processing. The origin of this volume is in the ISCA Tutorial and Research Workshop on Non-Linear Speech Processing, NOLISP’09, ...
  • A note on the application of integrals involving cyclic products kernels
    Buldygin, Valery V.; Zaiats, Vladimir; Utzet, Frederic (Universitat de Vic, 31-05-2005)
    A l'estadística de processos estocàstics i camps aleatoris, una funció de moments o un cumulant d'un estimador de la funció de correlació o de la densitat espectral sovint pot contenir una integral amb un producte cíclic ...
  • On cumulant techniques in speech processing
    Zaiats, Vladimir; Solé-Casals, Jordi (2009)
    This paper analyzes applications of cumulant analysis in speech processing. A special focus is made on different second-order statistics. A dominant role is played by an integral representation for cumulants by means ...
  • Reducción del vector de características de reconocimiento facial
    Travieso, Carlos M.; Solé-Casals, Jordi; Zaiats, Vladimir; Alonso, Jesús B.; Ferrer, Miguel A. (2008)
    In this present work, we are proposing a characteristics reduction system for a facial biometric identification system, using transformed domains such as discrete cosine transformed (DCT) and discrete wavelets transformed ...
  • 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 ...
  • The Barcelona International Conference on Advances in Statistics (BAS 2012) : Abstracts of communications
    Zaiats, Vladimir (Universitat de Vic. Escola Politècnica Superior. Grup de Recerca en Tecnologies Digitals, 18-06-2012)
    Conferència Organitzada per l'Escola Politècnica Superior, Universitat de Vic en col·laboració amb Servei d'Estadística de la Universitat Autònoma de Barcelona i CosmoCaixa Barcelona. Celebrada del 18 al 22 de juny de 2012 ...