Search for dissertations about: "speech processing"

Showing result 1 - 5 of 130 swedish dissertations containing the words speech processing.

  2. 1. Mining Speech Sounds : Machine Learning Methods for Automatic Speech Recognition and Analysis

    Author : Giampiero Salvi; Björn Granström; Torbjørn Svendsen; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; speech; machine learning; data mining; signal processing; Computer science; Datavetenskap;

    Abstract : This thesis collects studies on machine learning methods applied to speech technology and speech research problems. The six research papers included in this thesis are organised in three main areas. The first group of studies were carried out within the European project Synface. READ MORE

  4. 2. Speech Signal Extraction : A Multichannel Approach

    Author : Nedelko Grbic; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Speech Enhancement; Blind signal separation; Echo control; Adaptive systems;

    Abstract : In speech signal extraction the aim is to extract human speech in a physical environment by using microphones. In any real world environment there are many disturbance sources that cause unwanted sound pressure, which in turn may degrade the comprehension of the speech at the microphones. READ MORE

  5. 3. Dyslexics' phonological processing in relation to speech perception

    Author : Michael Gruber; Åke Olofsson; Peter Juslin; Maria Mody; Umeå universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Psychology; Dyslexia; speech perception; phonological representations; reading acquisition; sine wave speech; phonological deficit hypothesis; phonological awareness; phonological processing; orthographic processing; Psykologi; Psychology; Psykologi; Psychology; psykologi;

    Abstract : The general aim of this thesis was to investigate phonological processing skills in dyslexic children and adults and their relation to speech perception. Dyslexia can be studied at various levels: at a biological, cognitive and an environmental level. This thesis mainly looks at environmental and cognitive factors. READ MORE

  6. 4. Speech enhancement for mobile communications

    Author : Harald Gustafsson; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; speech enhancement; spectral subtraction;

    Abstract : Three major applications of speech enhancement have been studied: noise reduction for mobile telephone handsfree accessories, noise reduction for handheld mobile telephones, and short delay noise reduction for frame-less telephone systems. During conversation, both hearing and speaking adapt to the background noise in a noisy environment. READ MORE

  7. 5. Perceptual and Squared Error Aspects in Speech and Audio Coding

    Author : Harald Pobloth; Bastiaan Kleijn; Gernot Kubin; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Signalbehandling; speech coding; audio coding; auditory models; perceptual distortion measures; squared error; Signalbehandling; Signal processing; Signalbehandling;

    Abstract : In the process of quantization, speech and audio signals are changed. This thesis contains four papers concerned with comparing and minimizing different measures to quantify the changes introduced. Before quantization the signal can be transformed to another domain. Transforms related to the discrete Fourier transform allow for e. READ MORE