Search for dissertations about: "Olov Engwall"

Found 5 swedish dissertations containing the words Olov Engwall.

  1. 1. Tongue Talking : Studies in Intraoral Speech Synthesis

    Author : Olov Engwall; KTH; []
    Keywords : articulatory modeling; speech synthesis; three-dimensional tongue; Magnetic Resonance Imaging; TECHNOLOGY; TEKNIKVETENSKAP;

    Abstract : .... READ MORE

  2. 2. From Acoustics to Articulation : Study of the acoustic-articulatory relationship along with methods to normalize and adapt to variations in production across different speakers

    Author : Gopal Ananthakrishnan; Olov Engwall; Gérard Bailly; KTH; []

    Abstract : The focus of this thesis is the relationship between the articulation ofspeech and the acoustics of produced speech. There are several problems thatare encountered in understanding this relationship, given the non-linearity,variance and non-uniqueness in the mapping, as well as the differences thatexist in the size and shape of the articulators, and consequently the acoustics,for different speakers. READ MORE

  3. 3. Computational Modeling of the Vocal Tract : Applications to Speech Production

    Author : Saeed Dabbaghchian; Olov Engwall; Sidney Fels; KTH; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; vocal tract; upper airway; speech production; biomechanical model; acoustic model; vocal tract reconstruction; Tal- och musikkommunikation; Speech and Music Communication;

    Abstract : Human speech production is a complex process, involving neuromuscular control signals, the effects of articulators' biomechanical properties and acoustic wave propagation in a vocal tract tube of intricate shape. Modeling these phenomena may play an important role in advancing our understanding of the involved mechanisms, and may also have future medical applications, e. READ MORE

  4. 4. Perceptually motivated speech recognition and mispronunciation detection

    Author : Christos Koniaris; Olov Engwall; Martin Cooke; KTH; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; TEKNIK OCH TEKNOLOGIER; NATURAL SCIENCES; ENGINEERING AND TECHNOLOGY; feature extraction; feature selection; auditory models; MFCCs; speech recognition; distortion measures; perturbation analysis; psychoacoustics; human perception; sensitivity matrix; pronunciation error detection; phoneme; second language; perceptual assessment;

    Abstract : This doctoral thesis is the result of a research effort performed in two fields of speech technology, i.e., speech recognition and mispronunciation detection. Although the two areas are clearly distinguishable, the proposed approaches share a common hypothesis based on psychoacoustic processing of speech signals. READ MORE

  5. 5. The Virtual Language Teacher : Models and applications for language learning using embodied conversational agents

    Author : Preben Wik; Björn Granström; Olov Engwall; Valerie Hazan; KTH; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; Language learning; embodied conversational agents; speech technology; computer assisted language learning; computer assisted pronunciation training; Information technology; Informationsteknik; SRA - ICT; SRA - Informations- och kommunikationsteknik;

    Abstract : This thesis presents a framework for computer assisted language learning using a virtual language teacher. It is an attempt at creating, not only a new type of language learning software, but also a server-based application that collects large amounts of speech material for future research purposes. READ MORE