Nordic Graduate School of Language Technology

Speech Technology Level 1


The class will be jointly organized by

Rolf Carlson

Dept. Speech, Music and Hearing, KTH, Stockholm, Sweden

Torbjørn Svendsen

Dept. of Electronics and Telecommunications, NTNU, Trondheim, Norway



Björn Granström
David House

Rolf Carlson

Torbjørn Svendsen


The start of the class will be in Göteborg September 14, 2004 followed by one meeting in Göteborg November 1 – 2 and one meeting in Stockholm in January 19-21, 2005.



The aim of this course is to give an overview of speech technology, some of the underlying theories and models and how these are integrated into applications, such as multimodal dialog systems.


The course is intended for both students with a limited knowledge of the field and for students with a more extensive background in speech technology, who will be expected to take a more active part in the discussion of current research. In this way, the course is meant to contribute to the common platform for students with different backgrounds in the Nordic graduate school of language technology supported by NorFA.


The course is divided into 5 parts:

Introductory lectures; Reading the listed material; Individual practical exercises; Preparing a term paper; and a Closing seminar including discussions, practical exercises and presentation of the term papers.


Introductory lectures will be held in September and November. in Göteborg. These lectures will give an overview of the field with an emphasis on basic concepts and standard methods.


Individual practical exercises will include speech analysis and some other specific tasks related to speech technology. The results should be reported and discussed during the fall period.


During the course a term paper should be prepared by each student. The paper should be presented during the closing seminar in January (Stockholm). The closing seminar includes: Exercises, Presentation of term papers,  Discussion of the reading material and the term papers.



Introductory lecture slides will be linked to each topic.






Room C430


Rolf Carlson,
Torbjørn Svendsen

Acoustic Phonetics

David House


Room C430

Speech Synthesis

Björn Granström


10.00 – 12.00
13.00 -  18.00

Speech Recognition

Torbjørn Svendsen



09.00 – 11.00
11.00 – 12.00
13.00 -  15.00
Room H322

Dialog systems
Course Discussion
Dialog systems

Rolf Carlson
Rolf  & Torbjørn


Wednesday 19 13.00
Friday 21 afternoon

Closing seminar

All teachers


 Individual practical exercises

Phonetic analysis: Each student should carry out an acoustic investigation of their own speech. This exercise will make the student familiar with speech analysis and the basic structure of speech sounds. The results should be summarised and discussed by all students. More information can be found on

Synthesis: Each student should make an attempt to make a synthesis system based on waveform concatenation. The results should be summarised and discussed by all students. More information can be found on

Link to the OVE 1 synthesizer:

Speech Recognition: Speech recognition: Each student should make an attempt to construct a simple speech recognizer based on Hidden Markov models using available software and data. The results should be summarised and discussed by all students.


Some exercises may be too easy for students experienced in the specific area. In this case a more advanced subject will be specified together with the teacher.


During the closing seminar additional obligatory exercises will be included.

 Term paper

During the course a term paper should be prepared by each student and reviewed by two other students. The paper should be presented during the closing seminar.

More information here

Papers from the last classes can be found in the old Closing seminar links bellow.

Closing seminar

The closing seminar includes:

·           Exercises

·           Presentation of term papers

·           Discussion of the reading material and the term papers.

More information here


Reading material

Acoustic and Auditory Phonetics, Keith Johnson, ISBN# 0-631-20094-0 (a second edition is also available)

An Introduction to Text-To-Speech Synthesis, Thierry Dutoit, ISBN# 0-7923-7923-4498-7

Holmes, John and Wendy Holmes (2001 2nd): Speech Synthesis and Recognition, London: Taylor & Francis, ISBN 0-7484-0856-8 (hardback), ISBN 0-7484-0857-6 (paperback)

Michael F McTear (2002) Spoken dialogue technology: enabling the conversational interface. ACM Computing Surveys, Volume 34 , Issue 1 (March 2002), pp. 90 - 169.

Additional papers

A selection of papers and other publications will be used as additional reading material for each subtopic.

More information here


In order to pass the course the students must: Complete the practical exercises; Prepare and present the term paper; Review two term papers; Participate actively in the discussions in the closing seminar.

How to apply

Information on  how to apply and course requirements can be found on or follow the links from . Deadline for application is one month before the start of the course.




Last updated: June 21, 2005