Sökning: "cross-correlation"

Visar resultat 1 - 5 av 60 uppsatser innehållade ordet cross-correlation.

  1. 1. Beamforming and Blind Signal Separation for Far-field Voice Capture using a Microphone Array

    Master-uppsats, Lunds universitet/Institutionen för elektro- och informationsteknik

    Författare :Luke Postema; Johan Davidsson; [2019]
    Nyckelord :Beamforming; Microphone array; Minimum variance distortionless response; delay-and-sum; direction of arrival; blind signal separation; Technology and Engineering;

    Sammanfattning : With the evolving technology of mobile electronics and other forms of communication methods, an increasing demand of speech intelligibility is introduced. In a conference room for example, multiple microphones are placed directly in front of the speaker in order to pick up clean speech. However, several challenges still exist. LÄS MER

  2. 2. Development of new criteria for train detection and evaluation in critical conditions

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Sofiane Kerbal; [2019]
    Nyckelord :railway signaling; train detection; track circuit; shunt; frequency modulation; frequency-shift keying modulation; third-order harmonic; short-time Fourier transform; power spectral density estimation; cross-correlation;

    Sammanfattning : Railway signaling is of paramount importance to ensure traffic management andsafety on the rail network. The main lines are divided into sections called ‘blocks’,which are governed by a fixed signal installation. To prevent trains from colliding,each block allows one train at once. LÄS MER

  3. 3. Stereo-to-Five Channels Upmix Methods, Implementation and Comparative Study

    H-uppsats, Chalmers tekniska högskola/Institutionen för arkitektur och samhällsbyggnadsteknik

    Författare :PANTELEIMON PAPASTERGIOU; [2018]
    Nyckelord :patial audio; spatial enhancenment; upmix; primary ambience extraction; adaptive filtering;

    Sammanfattning : The aim of several 3D audio concepts and products is to create a more immersive, engaging and natural-sounded listening experience. Emerging audio signal process-ing techniques, make it possible for regular stereo recordings to be compatible and reproduced with multichannel home theatre or automotive loudspeaker audio systems. LÄS MER

  4. 4. Improving AR visualizationwith Kalman filtering andhorizon-based orientation : – To prevent boats to run aground at sea

    Master-uppsats, Linköpings universitet/Programvara och system

    Författare :Pontus Hero-Ek; [2018]
    Nyckelord :Augmented Reality; Horizon-based orientation; Kalman filter;

    Sammanfattning : This thesis researched the possibility of improving the compass of smartphones as theearth’s magnetic field is not strong and is easily disturbed, either by the environment ortechnology. The compass is used in Augmented Reality (AR) when the AR visualizationshould correspond to a position on earth. LÄS MER

  5. 5. Estimation of Relative Seismic Velocity Changes Around Katla Volcano, Using Coda in Ambient Seismic Noise

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Frida Jonsdottir; [2018]
    Nyckelord :Katla volcano; Iceland; ambient seismic noise; coda waves; relative velocity variations; Katla vulkan; Island; omgivande seismiskt brus; codavågor; relativa hastighetsvariationer;

    Sammanfattning : Relative seismic velocity variations in the Earth’s crust can be estimated by using ambient seismic noise records from a pair of stations. Velocity variations can be caused by stress perturbations in the subsurface. Therefore, information on stress changes in the crust can possibly be retrieved from measured velocity variations in the medium. LÄS MER