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Showing result 1 - 5 of 6 swedish dissertations matching the above criteria.

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

    Author : Mattias Dahl; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : 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. READ MORE

  4. 2. Subband Beamforming for Speech Enhancement within a Motorcycle helmet

    Author : Per Cornelius; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Beamfroming; Microphone array system;

    Abstract : The increased mobility in society has led to a need for convenient mobile communication in many different type of environments. Environments such as a motorcycle helmet, engine rooms and most industrial sites share a common challenge in that they often offer significant acoustic background noise. READ MORE

  5. 3. Optimal and Adaptive Subband Beamforming

    Author : Nedelko Grbic; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Beamforming; Optimal; Adaptive; Speech Enhancement;

    Abstract : The increased use of personal communication devices, personal computers and wireless cellular telephones enables the development of new inter-personal communication systems. The merge between computers and telephony technologies brings up the demand for convenient hands-free communications. READ MORE

  6. 4. Computer Vision without Vision : Methods and Applications of Radio and Audio Based SLAM

    Author : Kenneth John Batstone; Mathematical Imaging Group; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TOA; Self-Calibration; Localization; 802.11mc; Round-Trip Time;

    Abstract : The central problem of this thesis is estimating receiver-sender node positions from measured receiver-sender distances or equivalent measurements. This problem arises in many applications such as microphone array calibration, radio antenna array calibration, mapping and positioning using ultra-wideband and mapping and positioning using round-trip-time measurements between mobile phones and Wi-Fi-units. READ MORE

  7. 5. Soft-Constrained Subband Beamforming for Speech Enhancement

    Author : Zohra Yermeche; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : New speech acquisition applications are emerging as a result of advances in technology and the prevalence of mobile communication. While today voice control of consumer equipment is becoming a reality, communication technology has extended voice connectivity to personal computers and mobile communication devices with the aim of enabling natural communication in a variety of environments such as cars, restaurants and offices. READ MORE