2004/4

Browse

Recent Submissions

Now showing 1 - 5 of 15
  • Thumbnail Image
    Item
    Laboratory of Digital Video and Television Technology
    (Společnost pro radioelektronické inženýrství, 2004-12) Ricny, Vaclav
    This short paper provides information on the technical instrumentation and application possibilities of the newly installed laboratory of digital video and television technology at the Department of Radio Electronics FEEC BTU in Brno . This laboratory can be used for laboratory education and research.
  • Thumbnail Image
    Item
    New Directions in Modeling the Lighting Systems
    (Společnost pro radioelektronické inženýrství, 2004-12) Kadlecova, Eva; Fiala, Pavel
    This paper presents information about new directions in the modeling of lighting systems, and an overview of methods for the modeling of lighting systems. The new R-FEM method is described, which is a combination of the Radiosity method and the Finite Elements Method. The paper contains modeling results and their verification by experimental measurements and by the Matlab simulation for this R-FEM method.
  • Thumbnail Image
    Item
    Higher Efficiency of Motion Estimation Methods
    (Společnost pro radioelektronické inženýrství, 2004-12) Gamcova, Maria; Marchevsky, Stanislav; Gamec, Jan
    This paper presents a new motion estimation algorithm to improve the performance of the existing searching algorithms at a relative low computational cost. We try to amend the incorrect and/or inaccurate estimate of motion with higher precision by using adaptive weighted median filtering and its modifications. The median filter is well-known. A more general filter, called the Adaptively Weighted Median Filter (AWM), of which the median filter is a special case, is described. The submitted modifications conditionally use the AWM and full search algorithm (FSA). Simulation results show that the proposed technique can efficiently improve the motion estimation performance.
  • Thumbnail Image
    Item
    Implementation of CT and IHT Processors for Invariant Object Recognition System
    (Společnost pro radioelektronické inženýrství, 2004-12) Turan, Jan; Ovsenik, L'ubos; Benca, Martin; Turan, Jan, Jr.
    This paper presents PDL or ASIC implementation of key modules of invariant object recognition system based on the combination of the Incremental Hough transform (IHT), correlation and rapid transform (RT). The invariant object recognition system was represented partially in C++ language for general-purpose processor on personal computer and partially described in VHDL code for implementation in PLD or ASIC.
  • Thumbnail Image
    Item
    An Analysis/Synthesis System of Audio Signal with Utilization of an SN Model
    (Společnost pro radioelektronické inženýrství, 2004-12) Nagy, Martin Turi; Rozinaj, Gregor
    An SN (sinusoids plus noise) model is a spectral model, in which the periodic components of the sound are represented by sinusoids with time-varying frequencies, amplitudes and phases. The remaining non-periodic components are represented by a filtered noise. The sinusoidal model utilizes physical properties of musical instruments and the noise model utilizes the human inability to perceive the exact spectral shape or the phase of stochastic signals. SN modeling can be applied in a compression, transformation, separation of sounds, etc. The designed system is based on methods used in the SN modeling. We have proposed a model that achieves good results in audio perception. Although many systems do not save phases of the sinusoids, they are important for better modelling of transients, for the computation of residual and last but not least for stereo signals, too. One of the fundamental properties of the proposed system is the ability of the signal reconstruction not only from the amplitude but from the phase point of view, as well.