Sökning: "noise cancelling"

Visar resultat 1 - 5 av 6 avhandlingar innehållade orden noise cancelling.

  1. 1. Acoustic Noise and Echo Cancelling : Microphone Array Methods and Applications

    Detta är en avhandling från Lund/Karlskrona : University of Karlskrona/Ronneby - Lund University

    Författare :Mattias Dahl; Blekinge Tekniska Högskola.; [1997]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : This Licentiate thesis is divided into three parts corresponding to three different papers. There is one research report, one conference paper and one submitted journal paper. All three parts deal with acoustic echo and/or noise cancelling problems when using adaptive microphone arrays. LÄS MER

  2. 2. On Enhancement and Quality Assessment of Audio and Video in Communication Systems

    Detta är en avhandling från Karlskrona : Blekinge Institute of Technology

    Författare :Andreas Rossholm; Blekinge Tekniska Högskola.; [2014]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; QoE; video quality assessment; video quality metric; multi-linear regression; artificial neural network; support vector machine; quality predictor; machine learning; temporal scaling; spatial scaling; video compression; deblocking filter; noise cancelling; synchronization; audio delay; video delay; GSM interference signal; noise cancellation; notch filtering;

    Sammanfattning : The use of audio and video communication has increased exponentially over the last decade and has gone from speech over GSM to HD resolution video conference between continents on mobile devices. As the use becomes more widespread the interest in delivering high quality media increases even on devices with limited resources. LÄS MER

  3. 3. Noise Cancelling Using Spatial Filters in Broadband Adaptive Beamformers

    Detta är en avhandling från Luleå : Luleå University of Technology

    Författare :Sven Nordebo; Blekinge Tekniska Högskola.; [1993]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : .... LÄS MER

  4. 4. Linear Quadratic Gaussian Controllers for Feedforward Active Noise Control : Pushing Performance and Moving Towards Adaptive Control

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Annea Barkefors; Uppsala universitet.; [2014]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; active noise control; ANC; LQG; feedforward control; sound field control; Elektroteknik med inriktning mot reglerteknik; Electrical Engineering with specialization in Automatic Control;

    Sammanfattning : Active noise control is a research area focused on using destructive interference of sound fields to attenuate undesired noise. Methods for active noise control are best suited for low frequency noise, as the complexity of the problem grows rapidly with frequency. LÄS MER

  5. 5. Filter Bank Techniques for Signal and Image Processing

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Farook Sattar; [1996]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Imaging; Higher-order statistics; Detection; Echo cancelling; Multirate system; Multiscale; Image enhancement; Time-frequency analysis and synthesis; Non-stationary signals; Filter bank; Non-parametric estimation; image processing; Bildbehandling; Signal processing; Signalbehandling;

    Sammanfattning : This thesis consists of five parts, each of which considers methods based on filter banks for different applications in signal and image processing. In Part I, a non-parametric estimation method is proposed using filter banks to estimate signals with varying waveforms and arrival times. LÄS MER