Sökning: "Bastiaan Kleijn"

Visar resultat 6 - 10 av 15 avhandlingar innehållade orden Bastiaan Kleijn.

1. 6. Distribution Preserving Quantization

   Författare :Minyue Li; W. Bastiaan Kleijn; Jan Østergaard; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Telecommunication; Telekommunikation;

   Sammanfattning : In the lossy coding of perceptually relevant signals, such as sound and images, the ultimate goal is to achieve good perceived quality of the reconstructed signal, under a constraint on the bit-rate. Conventional methodologies focus either on a rate-distortion optimization or on the preservation of signal features. LÄS MER

3. 7. Speech Enhancement Using Nonnegative MatrixFactorization and Hidden Markov Models

   Författare :Nasser Mohammadiha; Arne Leijon; W. Bastiaan Kleijn; Cédric Févotte; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Speech enhancement; noise reduction; nonnegative matrix factorization; hidden Markov model; probabilistic latent component analysis; online dictionary learning; super-Gaussian distribution; MMSE estimator; temporal dependencies; dynamic NMF;

   Sammanfattning : Reducing interference noise in a noisy speech recording has been a challenging task for many years yet has a variety of applications, for example, in handsfree mobile communications, in speech recognition, and in hearing aids. Traditional single-channel noise reduction schemes, such as Wiener filtering, do not work satisfactorily in the presence of non-stationary background noise. LÄS MER

4. 8. Improving Quality of Service in Baseband Speech Communication

   Författare :Petko Nikolov Petkov; W. Bastiaan Kleijn; Yannis Stylianou; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Speech and Music Communication; Tal- och musikkommunikation; SRA - ICT; SRA - Informations- och kommunikationsteknik;

   Sammanfattning : Speech is the most important communication modality for human interaction. Automatic speech recognition and speech synthesis have extended further the relevance of speech to man-machine interaction. LÄS MER

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

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

   Sammanfattning : 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. LÄS MER

7. 10. On Prosodic Modification of Speech

   Författare :Barbara Resch; Bastiaan Kleijn; Thomas Eriksson; KTH; []
   Nyckelord :;

   Sammanfattning : Prosodic modification has become of major theoretical and practical interest in the field of speech processing research over the last decades. Algorithms for time and pitch scaling are used both for speech modification and for speech synthesis. LÄS MER