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Time synchronization of speech
KTH, Superseded Departments, Signals, Sensors and Systems.
KTH, Superseded Departments, Signals, Sensors and Systems.
2003 (English)In: Models and Analysis Of Vocal Emissions for Biomedical Applications:   3rd International Workshop / [ed] Claudia Manfredi, Firenze University Press 2003 , 2003, 215-218 p.Conference paper, Published paper (Refereed)
Abstract [en]

A time synchronization system is a helpful tool for different applications, such as language education and speech therapy. We present a system that performs temporal alignment of two utterances of the same phrase. The system consists of two parts. In the first part the time warping function is determined with Dynamic Time Warping (DTW). In the second part the time scale of one utterance is modified according to the time warping function. To obtain good performance, the dynamic time warping algorithm required significant modifications. Our listening test confirms that our time synchronization system has high precision and the resulting speech utterances are of natural quality.

 

Place, publisher, year, edition, pages
Firenze University Press 2003 , 2003. 215-218 p.
Keyword [en]
Time Synchronization, Time Scale Modification, DTW, WSOLA
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-9084ISBN: 88-8453-154-3 (print)OAI: oai:DiVA.org:kth-9084DiVA: diva2:14644
Conference
3rd International Workshop MAVEBA 2003, December 10-12, 2003, Firenze, Italy
Note
QC 20101123Available from: 2006-02-10 Created: 2006-02-10 Last updated: 2010-11-23Bibliographically approved
In thesis
1. On Prosodic Modification of Speech
Open this publication in new window or tab >>On Prosodic Modification of Speech
2006 (English)Licentiate thesis, comprehensive summary (Other scientific)
Abstract [en]

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. The thesis consists of an introduction providing an overview and discussion of existing techniques for time and pitch scaling and of three research papers in this area.

In paper A a system for time synchronization of speech is presented. It performs an alignment of two utterances of the same sentence, where one of the utterances is modified in time scale so as to be synchronized with the other utterance. The system is based on Dynamic Time Warping (DTW) and the Waveform Similarity Overlap and Add (WSOLA) method, a technique for time scaling of speech signals. Paper B and C complement each other and present a novel speech representation system that facilitates both time and pitch scaling of speech signals. Paper A describes a method to warp a signal with time-varying pitch to a signal with constant pitch. For this an accurate continuous pitch track is needed. The continuous pitch track is described as a B-spline expansion with coefficients that are selected to maximize a periodicity criterion. The warping to a constant pitch corresponds to the first stage of the system presented in paper C, which describes a two-stage transform that exploits long-term periodicity to obtain a sparse representation of speech. The new system facilitates a decomposition into a voiced and unvoiced component.

Place, publisher, year, edition, pages
Stockholm: KTH, 2006. ix, 38 p.
Series
Trita-EE, ISSN 1653-5146 ; 2006:002
Identifiers
urn:nbn:se:kth:diva-621 (URN)91-7178-267-2 (ISBN)
Presentation
2006-02-20, seminarierum S3, 3 tr, Osquldas 10, Stockholm, 09:30
Opponent
Supervisors
Note
QC 20101123Available from: 2006-02-10 Created: 2006-02-10 Last updated: 2010-11-23Bibliographically approved

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf