2004/3

 

Recent Submissions

  • Behind the Structure of Video VQ-Coder 

    Hanzlik, Pavel; Pata, Petr (Společnost pro radioelektronické inženýrství, 2004-09)
    This paper introduces an implementation and structure of a video codec (coder-decoder) using Vector Quantization (VQ) in the program Matlab. It also aims on the VQ weak and strong features and it describes an experiment ...

  • BAMUD Features Demonstration by System View 

    Longauer, Leos; Marchevsky, Stanislav; Kocur, Dusan (Společnost pro radioelektronické inženýrství, 2004-09)
    Direct-sequence code-division multiple access (DS-CDMA) is a frequently used wireless technology in DS-CDMA communications. The conventional DS-CDMA detector follows a single-user detection strategy in which each user is ...

  • Analysis of Homogeneous Coplanar Strip Line 

    Sadek, Vaclav; Svacina, Jiri (Společnost pro radioelektronické inženýrství, 2004-09)
    The goal of this work is to introduce a new, maybe complicated but in the final result mathematically simplest model of the coplanar strip line (CPS). In contrast to the usual method based on elliptical integrals the ...

  • MAP Based Speaker Adaptation in Very Large Vocabulary Speech Recognition of Czech 

    Cerva, Petr; Nouza, Jan (Společnost pro radioelektronické inženýrství, 2004-09)
    The paper deals with the problem of efficient adaptation of speech recognition systems to individual users. The goal is to achieve better performance in specific applications where one known speaker is expected. In our ...

  • Correlation Analysis in a Pulse Wave Velocity Evaluation 

    Jelinek, Martin; Dobes, Josef; Pousek, Lubomir (Společnost pro radioelektronické inženýrství, 2004-09)
    In this paper, methods for a time delay evaluation of phonocardiographic (PCG) signals are presented to estimate a pulse wave velocity (PWV) in a cardiovascular system of a human body, especially in arterial segments of ...

  • Suppression of EM Fields using Active Control Algorithms and MIMO Antenna System 

    Hult, Tommy; Mohammed, Abbas (Společnost pro radioelektronické inženýrství, 2004-09)
    Active methods for attenuating acoustic pressure fields have been successfully used in many applications. In this paper we investigate some of these active control methods in combination with a MIMO antenna system in order ...

  • Optimized Second-Order Dynamical Systems and Their RLC Circuit Models with PWL Controlled Sources 

    Pospisil, Jiri; Kolka, Zdenek; Hanus, Stanislav; Petrzela, Jiri; Brzobohaty, Jaromir (Společnost pro radioelektronické inženýrství, 2004-09)
    Complementary active RLC circuit models with a voltage-controlled voltage source (VCVS) and a current-controlled current source (CCCS) for the second-order autonomous dynamical system realization are proposed. The main ...

  • Diffraction Calculations and Measurements in Millimeter Frequency Band 

    Valtr, Pavel; Pechac, Pavel (Společnost pro radioelektronické inženýrství, 2004-09)
    The paper deals with a study of diffraction on dielectric wedge (building corner) in millimeter frequency band, both theoretically and experimentally, to provide knowledge support for ray tracing/launching calculations of ...

  • Enhancing the Accuracy of Microwave Element Models by Artificial Neural Networks 

    Dobes, Josef; Pospisil, Ladislav (Společnost pro radioelektronické inženýrství, 2004-09)
    In the recent PSpice programs, five types of the GaAs FET model have been implemented. However, some of them are too sophisticated and therefore very difficult to measure and identify afterwards, especially the realistic ...

  • Study and Application of Silence Model Adaptation for Use in Telephone Speech Recognition System 

    Novotny, Jan; Sovka, Pavel; Uhlir, Jan (Společnost pro radioelektronické inženýrství, 2004-09)
    This paper addresses the problem of the mismatch between a silence model and background noises which often occurs in a telephone speech recognition system (SRS) application. At first, the use of parallel model combination ...