Katedra Systemów Multimedialnych - Jednostki Administracyjne - MOST Wiedzy

Twoje konto

zaloguj

Wyszukiwarka

Katedra Systemów Multimedialnych

Publikacje

Filtry

wszystkich: 908

  • Kategoria
  • Rok
  • Opcje

wyczyść Filtry wybranego katalogu niedostępne

Katalog Publikacji

Rok 2013
Rok 2012
  • A Method of Real-Time Non-uniform Speech Stretching
    Publikacja

    - Rok 2012

    Developed method of real-time non-uniform speech stretching is presented.The proposed solution is based on the well-known SOLA algorithm(Synchronous Overlap and Add). Non-uniform time-scale modification isachieved by the adjustment of time scaling factor values in accordance with thesignal content. Dependently on the speech unit (vowels/consonants), instantaneousrate of speech (ROS), and speech signal presence, values of the scalingfactor...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • A New Method for Automatic Generation of Animated Motion
    Publikacja

    - Rok 2012

    A new method for generation of animation with a quality comparable to a natural motion is presented. Proposed algorithm is based on fuzzy description of motion parameters and subjective features. It is assumed that such processing increases naturalness and quality of motion, which is verified by subjective evaluation tests. First, reference motion data are gathered utilizing a motion capture system, then these data are reduced...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Akustyka
    Publikacja

    - Rok 2012

    W artykule przedstawiono zadania realizowane w ramach projektu PL GRID Plus przez zespół wykonawców Katedry Systemów Multimedialnych. Zadanie te obejmują przygotowanie zestawu usług umożliwiających wykonywanie obliczeń map hałasu i wpływu hałasu na słuch z wykorzystaniem infrastruktury PL GRID.

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Analysis of impact of lossy audio compression on the robustness of watermark embedded in the DWT domain for non-blind copyright protection
    Publikacja

    - Rok 2012

    A methodology of non-blind watermarking of the audio content is proposed. The outline of audio copyright problem and motivation for practical applications are discussed. The algorithmic theory pertaining watermarking techniques is briefly introduced. The system architecture together with employed workflows for embedding and extracting the watermarks are described. The implemented approach is described and obtained results are reported....

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Application of virtual gate for counting people participating in large public events
    Publikacja

    - Rok 2012

    The concept and practical application of the developed algorithm forpeople counting in crowded scene is presented. The aim of the work is to estimatethe number of people passing towards entrances of a large sport hall. Thedetails of implemented the Virtual Gate algorithm are presented. The video signalfrom the camera installed in the building constituted the input for the algorithm.The most challenging problem was the unpredicted...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Automatic Analysis System of TV Commercial Emission Level
    Publikacja

    - Rok 2012

    The purpose of the study was to determine whether the commercial emission level is higher than the emission level of a regular program and to check if the commercials broadcasters follow the recommended levels of loudness. The paper shortly reviews some chosen methods of volume measurements specified in the ITU and EBU recommendations. Then, it describes a prototype of a system implemented in Embarcadero C++ Builder 2010 which...

  • Automatic assessment of the motor state of the Parkinson's disease patient --a case study
    Publikacja

    - Diagnostic Pathology - Rok 2012

    This paper presents a novel methodology in which the Unified Parkinson's Disease Rating Scale (UPDRS) data processed with a rule-based decision algorithm is used to predict the state of the Parkinson's Disease patients. The research was carried out to investigate whether the advancement of the Parkinson's Disease can be automatically assessed. For this purpose, past and current UPDRS data from 47 subjects were examined. The results...

    Pełny tekst do pobrania w portalu

  • Awareness evaluation of patients in vegetative state employing eye-gaze tracking system
    Publikacja

    - International Journal on Artificial Intelligence Tools - Rok 2012

    Application of eye-gaze tracking system to awareness evaluation is demonstrated. Hitherto awareness evaluation methods are presented. The assumptions of proposed method based on analysis of visual activity of patients in vegetative state are demonstrated. The eye-gaze tracking system ''Cyber-Eye'' developed at the Multimedia Systems Department employed to conducted experiments is presented. Research described in the paper indicates...

    Pełny tekst do pobrania w portalu

  • Brain-computer interaction based on EEG signal and gaze-tracking information = Analiza interackji mózg-komputer wykorzystująca sygnał EEg i informacje z systemu śledzenia punktu fiksacji wzroku
    Publikacja

    - Elektronika : konstrukcje, technologie, zastosowania - Rok 2012

    The article presents an attempt to integrate EEG signal analysis with information about human visual activities, i.e. gaze fixation point. The results from gaze-tracking-based measurement were combined with the standard EEG analysis. A search for correlation between the brain activity and the region of the screen observed by the user was performed. The preliminary stage of the study consists in electrooculography (EOG) signal processing....

  • Distributed System For Noise Threat Evaluation Based On Psychoacoustic Measurements
    Publikacja

    - Metrology and Measurement Systems - Rok 2012

    An innovative system designed for the continuous monitoring of acoustic climate of urban areas was presentedin the paper. The assessment of environmental threats is performed using online data, acquired through a grid ofengineered monitoring stations collecting comprehensive information about the acoustic climate of urban areas.The grid of proposed devices provides valuable data for the purpose of long and short time acoustic climateanalysis....

    Pełny tekst do pobrania w portalu

  • Editor's Farewell
    Publikacja

    - Archives of Acoustics - Rok 2012

    By this occasion, I would like to mention the major milestones Archives of Acoustics experienced during the last years. For some years, we concentrated our efforts on introducing Archives of Acoustics to the ISI Web of Knowledge and the Journal Citation Report databases.We achieved this aim, and since 2007 Archive of Acoustics has been referenced in the Journal Citation Report. Accordingly, our next object was to obtain the Impact...

    Pełny tekst do pobrania w portalu

  • Employing a biofeedback method based on hemispheric synchronization in effective learning
    Publikacja

    - Rok 2012

    In this paper an approach to build a brain computer-based hemispheric synchronization system is presented. The concept utilizes the wireless EEG signal registration and acquisition as well as advanced pre-processing methods. The influence of various filtration techniques of EOG artifacts on brain state recognition is examined. The emphasis is put on brain state recognition using band pass filtration for separation of individual...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Genetic programming extension to APF-based monocular human body pose estimation
    Publikacja

    - MULTIMEDIA TOOLS AND APPLICATIONS - Rok 2012

    New method of the human body pose estimation based on a single camera 2D observation is presented, aimed at smart surveillance related video analysis and action recognition. It employs 3D model of the human body, and genetic algorithm combined with annealed particle filter for searching the global optimum of model state, best matching the object's 2D observation. Additionally, new motion cost metric is employed, considering current...

    Pełny tekst do pobrania w portalu

  • Hand gesture recognition supported by fuzzy rules and Kalman filters
    Publikacja

    - International Journal of Intelligent Information and Database Systems - Rok 2012

    The paper presents a system based on camera and multimediaprojector enabling a user to control computer applications by dynamic hand gestures. Gesture recognition methodology based on representing hand movement trajectory by motion vectors analysed using fuzzy rule-based inference is first given. For effective hand position tracking Kalman filters are employed. The system engineered is developed using J2SE and C++/OpenCV technology....

  • Implementacja na procesorze sygnałowym przesuwnika wysokości dźwiękuze skalowaniem zespolonej pulsacji chwilowej
    Publikacja

    - Przegląd Elektrotechniczny - Rok 2012

    Opracowano przesuwnik wysokości dźwięku wykorzystujący metodę skalowania zespolonej pulsacji chwilowej otrzymywanej za pomocą zespolonego filtru Hilberta. Filtr Hilberta służy do pozyskania dwóchpodstawowych reprezentacji: amplitudy chwilowej oraz pulsacji chwilowej przetwarzanego sygnału, który ma wartości rzeczywiste. Sygnał wynikowy o przesuniętej wysokości dźwięku jest syntetyzowany za pomocą jednoczesnego skalowania powyższych...

  • Improved method for real-time speech stretching
    Publikacja

    - Rok 2012

    n algorithm for real-time speech stretching is presented. It was designed to modify input signal dependently on its content and on its relation with the historical input data. The proposed algorithm is a combination of speech signal analysis algorithms, i.e. voice, vowels/consonants, stuttering detection and SOLA (Synchronous-Overlap-and-Add) based speech stretching algorithm. This approach enables stretching input speech signal...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Katedra Systemów Multimedialnych
    Publikacja

    - Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne - Rok 2012

    The article provides a historical overview, discuss the issues of teaching and research, and presents the current offer of the Department to industry. This article was written on the occasion of the 60th anniversary of the Faculty of Electronics, Telecommunication and Informatics of Gdansk University of Technology. W artykule zamieszczono rys historyczny, omówienie programu dydaktycznego i tematyki badań naukowych oraz aktualną...

  • Methods of Improving Speech Intelligibility for Listeners with Hearing Resolution Deficit
    Publikacja

    - Diagnostic Pathology - Rok 2012

    Methods developed for real-time time scale modification (TSM) of speech signal are presented. They are based onthe non-uniform, speech rate depended SOLA algorithm (Synchronous Overlap and Add). Influence of theproposed method on the intelligibility of speech was investigated for two separate groups of listeners, i.e. hearingimpaired children and elderly listeners. It was shown that for the speech with average rate equal to or...

    Pełny tekst do pobrania w portalu

  • Multi-Camera Vehicle Tracking Using Local Image Features and Neural Networks
    Publikacja

    - Rok 2012

    A method for tracking moving objects crossing fields of view of multiple cameras is presented. The algorithm utilizes Artificial Neural Networks (ANNs). Each ANN is trained to recognize images of one moving object acquired by a single camera. Local image features calculated in the vicinity of automatically detected interest points are used as object image parameters. Next, ANNs are employed to identify the same objects captured...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Multiple sound sources localization in real time using acoustic vector sensor
    Publikacja

    - Communications in Computer and Information Science - Rok 2012

    Method and preliminary results of multiple sound sources localization in real time using the acoustic vector sensor were presented in this study. Direction of arrival (DOA) for considered source was determined based on sound intensity method supported by Fourier analysis. Obtained spectrum components for considered signal allowed to determine the DOA value for the particular frequency independently. The accuracy of the developed...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • New Applications of Multimodal Human-Computer Interfaces
    Publikacja

    - Rok 2012

    Multimodal computer interfaces and examples of their applications to education software and for the disabled people are presented. The proposed interfaces include the interactive electronic whiteboard based on video image analysis, application for controlling computers with gestures and the audio interface for speech stretching for hearing impaired and stuttering people. Application of the eye-gaze tracking system to awareness...

  • Obiektywizacja bimodalnego procesu percepcji wzrokowo-słuchowej
    Publikacja

    - Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne - Rok 2012

    Jednoczesny odbiór bodźców słuchowych i wzrokowych często prowadzi do ukrycia lub przekłamania informacji zawartych w tych bodźcach. W literaturze efekt ten nazywany jest wpływem ściągającym obrazu na percepcję dźwięku. Do niedawna większość badań związanych ze zrozumieniem natury tego zjawiska opierała się na subiektywnych ocenach osób badanych. W referacie zaproponowano metodologię obiektywizacji wyników badań opartą na technologii...

  • Objectivization of Audio-Visual Correlation analysis
    Publikacja

    - Archives of Acoustics - Rok 2012

    Simultaneous perception of audio and visual stimuli often causes the concealment or misrepresentation of information actually contained in these stimuli. Such effects are called the ''image proximity effect'' or the ''ventriloquism effect'' in literature. Until recently, most research carried out to understand their nature was based on subjective assessments. The Authors of this paper propose a methodology based on both subjective...

    Pełny tekst do pobrania w portalu

  • Online Sound Restoration for Digital Library Applications
    Publikacja

    - Rok 2012

    A system for sound restoration was conceived and engineered having the following features: no special sound restoration software is needed to perform audio restoration by the user, the process of restoration employs automatic reduction of noise, wow and impulse distortions performed in the online mode, no skills in digital signal processing from the user are needed. The principles of the created system and its features as well...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Online urban acoustic noise monitoring system
    Publikacja

    - NOISE CONTROL ENGINEERING JOURNAL - Rok 2012

    Concepts and implementation of the Online Urban Noise Monitoring System are presented. Principles of proposed solution used for dynamic acoustical maps creating are discussed. The architecture of the system and the data acquisition scheme are described. The concept of noise mapping, based on noise source model and propagation simulations, was developed and employed in the system. Dynamic estimation of noise source parameters utilized...

    Pełny tekst do pobrania w serwisie zewnętrznym

  • Optymalizacja parametrów algorytmów rekonstrukcji sygnałów muzycznych
    Publikacja

    - Rok 2012

    Niniejszy referat przedstawia wyniki eksperymentów wykonanych w ramach projektu SYNAT. Przeprowadzono testy algorytmów służących do rekonstrukcji sygnałów muzycznych, tj. redukcji szumu impulsowego, szerokopasmowego oraz przesterowań w celu określenia zoptymalizowanych wartości parametrów algorytmów rekonstrukcji dla różnych gatunków muzycznych.

  • Praktyczne wykorzystanie modelu iso-9126 oraz narzędzi wspomagających proces testowania przy ocenie jakości oprogramowania
    Publikacja

    - Rok 2012

    dokument opisuje wykorzystanie modelu jakości oprogramowania iso-9126 do oceny jakości aplikacji do rozpoznawania osób i zdarzeń, przygotowanej w ramach unijnego projektu mayday euro 2012. zawiera przegląd wykorzystanych technik oraz narzędzi i sposób ich użycia przy ocenie jakości w zakresie funkcjonalności, niezawodności oraz łatwości utrzymania oprogramowania.

  • Projektowanie i analiza rekursywnych cyfrowych oscylatorów sygnałów sinusoidalnych i świergotowych
    Publikacja

    - Rok 2012

    Przedmiotem badań w rozprawie są rzeczywiste liniowe filtry cyfrowe rekursywne stacjonarne rzędu drugiego i wyższych, o dwu, trzech i więcej wyjściach - generujące, po pobudzeniu ich warunkami początkowymi, drgania niegasnące sinusoidalne lub przebiegi świergotowe na każdym wyjściu. Informacja o parametrach generowanych sygnałów jest zadawana w postaci warunków początkowych i współczynników struktury filtru. W rozprawie dokonano...

  • Resolving Conflicts in Object Tracking in Video Stream Employing Key Point Matching
    Publikacja

    - Rok 2012

    A novel approach to resolving ambiguous situations in object tracking in video streams is presented. The proposed method combines standard tracking technique employing Kalman filters with global feature matching method. Object detection is performed using a background subtraction algorithm, then Kalman filters are used for object tracking. At the same time, SURF key points are detected only in image sections identified as moving...

    Pełny tekst do pobrania w serwisie zewnętrznym