Research Field:

- Usability

Research Topics:

- VoIP-based speech transmission systems
- Virtual communication environments
   for multi-party conferencing
- Multi-modal communication systems
- Audio-visual Quality of IPTV and VoD

Biography

Alexander Raake joined the Labs in 2005 as a senior scientist. From 2004 to 2005, he was a Postdoctoral Researcher in the Man-Machine Communication Department of the LIMSI-CNRS in Orsay, France, working on speech intelligibility in multi-party virtual chat-rooms. From the Electrical Engineering and Information Technology Faculty of the Ruhr-University Bochum, he obtained his Doctoral Degree (Dr.-Ing.) in January 2005, as a result of his work as a research scientist at the Institute of Communication Acoustics (Jens Blauert). During his thesis work from 1999 to 2004, he studied the auditory quality of future user-interfaces, and quality under impairments due to packet-based transmission such as VoIP. He also investigated the perceived quality of enhanced services such as wideband speech transmission. After his graduation in 1997 he had first started a research activity at the Technical University in Lausanne (EPFL), studying properties of ferroelectric thin films. Before, he studied Electrical Engineering in Aachen (RWTH) and Paris (ENST/Télécom), involving student research at Symetrix Cooperation in Colorado-Springs, USA.

Since 1999, he participates in the standardisation activities of the International Telecommunication Union (ITU-T) on transmission performance of telephone networks and terminals, where he currently acts as a Co-Rapporteur for question Q.12/12, and as an Editor of Recommendations such as ITU-T Rec. G.107 (the "E-model").

Address

Quality and Usability Lab
Deutsche Telekom Laboratories
TU Berlin
Ernst-Reuter-Platz 7
D-10587 Berlin, Germany

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2006

• Raake, A.
  Speech Quality of VoIP: Assessment and Prediction
  John Wiley & Sons, UK-Chichester. (web site, .html)
• Raake, A.
  Short- and Long-term Packet Loss Behavior: Towards Speech Quality Prediction for Arbitrary Loss Distributions
  IEEE Trans. Audio, Speech and Language Proc., 14(6), 1957-1968. (abstract, .html)
• Möller, S., Raake, A., Kitawaki, N., Takahashi, A., and Wältermann, M.
  Impairment Factor Framework for Wideband Speech Codecs
  IEEE Trans. Audio, Speech and Language Proc., 14(6), 1969-1976. (abstract, .html)
• Raake, A., and Katz, B.
  Measurement and Prediction of Speech Intelligibility in a Virtual Chat Room
  In: Proc. 2nd ISCA/DEGA Tutorial and Research Workshop on Perceptual Quality of Systems, 4-6 September 2006, D-Berlin, 40-43. (abstract, .html)

   

• Raake, A., and Katz, B.
  SUS-based Method for Speech Reception Threshold Measurement in French
  In: Proc. 5th International Conference on Language Resources and Evaluation (LREC 2006), IT-Genoa, 2028-2033. (abstract, .html)

   

• Mareüil, P., D'Alessandro, C., Raake, A., Bailly, G., Garcia, M., and Morel, M. A Joint Intelligibility Evaluation of French Text-to-speech Synthesis Systems: The EvaSy SUS/ACR Campaign
  In: Proc. 5th International Conference on Language Resources and Evaluation (LREC 2006), IT-Genoa, 2034-2037. (abstract, .html)

   

• Wältermann, M., Raake, A., and Möller, S.
  Perceptual Dimensions of Wideband-transmitted Speech
  In: Proc. 2nd ISCA/DEGA Tutorial and Research Workshop on Perceptual Quality of Systems, 4-6 September 2006, D-Berlin, 103-108.

   

• Côté, N., Möller, S., Gautier-Turbin, V., and Raake, A.
  Analysis of a Quality Prediction Model for Wideband Speech Quality, the WB-PESQ
  In: Proc. 2nd ISCA/DEGA Tutorial and Research Workshop on Perceptual Quality of Systems, DE-Berlin, 115-122.

   

• Möller, S., Englert, R., Engelbrecht, K., Hafner, V., Jameson, A., Oulasvirta, A., Raake, A., and Reithinger, N.
  MeMo: Towards Automatic Usability Evaluation of Spoken Dialogue Services by User Error Simulations
  In: Proc. 9th Int. Conf. on Spoken Language Processing (Interspeech 2006 - ICSLP), US-Pittsburgh PA, 1786-1789.

   

• Scholz, K., Wältermann, M., Huo, L., Raake, A., Möller, S., and Heute, U.
  Estimation of the Quality Dimension 'Directness/Frequency Content' for the Instrumental Assessment of Speech Quality
  In: Proc. 9th International Conference on Spoken Language Processing (ICSLP 2006), USA-Pittsburgh, PA, 1523-1526.

   

• Wältermann, M., Scholz, K., Raake, A., Heute, U., and Möller, S.
  Underlying Quality Dimensions of Modern Telephone Connections
  In: Proc. 9th International Conference on Spoken Language Processing (ICSLP 2006), USA-Pittsburgh, PA, 2170-2173.

   

• ITU-T Delayed Contribution D.151
  Towards a Wideband E-Model: R-Scale Extension and Impairment Factors for Wideband Speech Codecs
  Federal

  Republic of Germany and Japan (Authors: S. Möller, A. Raake, N.

  Kitawaki, A. Takahashi, M. Wältermann), ITU-T SG12 Meeting, 5-13 June

  2006, CH-Geneva.

• Raake, A., and Katz, B.
  A Method for Measuring the Speech Reception Threshold in Different Languages
  32. Jahrestagung für Akustik, DE-Braunschweig, 20.-23. März 2006, Deutsche Gesellschaft für Akustik e.V. (DEGA), D-Berlin.

   

• Scholz, K., Wältermann, M., Huo, L., Raake, A., Möller, S., and Heute, U.
  Vergleich der instrumentellen Erfassung der Qualitätsdimension 'Direktheit/Frequenzgehalt' bei Schmalband- und Breitbandsprache
  In: Proc. 7. ITG-Fachtagung Sprachkommunikation, D-Kiel, 26.-28. April 2006, VDE Verlag, D-Berlin.

   

• Wältermann, M., Scholz, K., Raake, A., Heute, U., and Möller, S.
  Qualitätsdimensionen bei der Sprachübertragung in modernen Telekommunikationsnetzen
  In:

  Fortschritte der Akustik (DAGA '06), 32. Jahrestagung für Akustik,

  DE-Braunschweig, 20.-23. März 2006, Deutsche Gesellschaft für Akustik

  e.V. (DEGA), D-Berlin, 457-458.

• Scholz, K., Wältermann, M., Huo, L., Raake, A., Möller, S., and Heute, U.
  Messtechnische

  Erfassung der Qualitätsdimension 'Direktheit/Frequenzgehalt' zur

  instrumentellen Analyse und Beurteilung von Sprachqualität.
  In:

  Fortschritte der Akustik (DAGA '06), 32. Jahrestagung für Akustik,

  DE-Braunschweig, 20.-23. März 2006, Deutsche Gesellschaft für Akustik

  e.V. (DEGA), D-Berlin, 459-460.

2005

• Raake,

  A. and Möller, S. (2005). Quality Degradation Due to Linear and

  Non-linear Distortion of Wideband Speech, in: Proc. 4th EAA Convention

  (Forum Acusticum 2005), HU-Budapest, 29 Aug.-2 Sept. 2005.

• ITU-T

  Delayed Contribution D.029 (2005). Preliminary Equipment Impairment

  Factors for Wideband Speech Codecs, Federal Republic of Germany

  (Authors: S. Möller and A. Raake), ITU-T SG12 Meeting, 18-27 January

  2005, CH-Geneva.

• ITU-T Delayed Contribution D.028

  (2005). How Much Better Can Wideband Telephony Be? – Estimating the

  Necessary R-scale Extension, Federal Republic of Germany (Author: A.

  Raake), ITU-T SG 12 Meeting, 18-27 January 2005, CH-Geneva.

• ITU-T

  Delayed Contribution D.027 (2005). General Prediction of the Impairment

  due to Dependent (Non-Random) Packet Loss for Inclusion in the E-Model,

  Federal Republic of Germany (Author: A. Raake), ITU-T SG 12 Meeting,

  18-27 January 2005, CH-Geneva.

• ITU-T Temporary

  Document TD.024-GEN (2005). Draft Revised Recommendation G.107 (Author:

  A. Raake), ITU-T SG 12 Meeting, 18-27 January 2005, CH-Geneva.

• Hammer,

  F., Reichl, P., Raake, A. (2005). The Well-Tempered Conversation:

  Interactivity, Delay and Perceptual VoIP Quality, in: Proc. IEEE

  International Conference on Communications (ICC 2005), May 2005,

  KR-Seoul.

• Möller, S., Raake, A. (2005).

  Quantifying the Quality Difference Between Narrow-Band and Wideband

  Speech Codecs, in: Fortschritte der Akustik – DAGA 2005: Plenarvortr.

  u. Fachbeitr. d. 31. Dtsch. Jahrestg. f. Akust., DE-München, Dtsch.

  Ges. Akust., DE-Oldenburg.

2004

• Raake,

  A. (2004). Assessment and Parametric Modelling of Speech Quality in

  Voice-over-IP Networks, Doctoral Dissertation, Ruhr-University Bochum,

  Germany (yet unpublished).

• Raake, A. (2004).

  Predicting Speech Quality under Random Packet Loss: Individual

  Impairment and Additivity with other Network Impairments. Acta

  Acustica/Acustica, vol. 90, 1061-1083.

• Raake, A.

  (2004). How Much Better Can Wideband Telephony Be? – Estimating the

  Necessary R-scale Extension, presented at: ETSI Workshop on Wideband

  Speech Quality in Terminals and Networks: Assessment and Prediction,

  June 8-9, DE-Mainz, European Telecommunications Standards Institute,

  FR-Sophia Antipolis.

• Raake, A. (2004).

  Predicting speech quality under packet loss: Extension of the E-model,

  in: Proc. 7. Congrès Français d’Acoustique / 30. Dtsch. Jahrestg. f.

  Akust. (CFA/DAGA’04), FR-Strassburg, pp. 51-52.

• Raake,

  A. (2004). How do users perceive speech quality under combined

  “stationary” and non-stationary degradations?, in: Proc. 7. Congrès

  Français d’Acoustique / 30. Dtsch. Jahrestg. f. Akust. (CFA/DAGA’04),

  FR-Strassburg, pp. 265-266.

• ITU-T Delayed

  Contribution D.222 (2004). Speech transmission quality under 2-state

  Markov loss and implications for the E-model, Federal Republic of

  Germany (Author: A. Raake), ITU T SG 12 Meeting, 24-31 March 2004,

  CH-Geneva.

• ITU-T Delayed Contribution D.221

  (2004). E-Model: Additivity of Burst Packet Loss Impairment with other

  Impairment Types, Federal Republic of Germany (Author: A. Raake), ITU-T

  SG 12 Meeting, 24-31 March 2004, CH-Geneva.

• Hammer,

  F., Reichl, P., Raake, A. (2004). Elements of Interactivity in

  Telephone Conversations, in: Proc. 8th Int. Conf. on Spoken Language

  Processing (Interspeech 2004 - ICSLP), KR-Jeju Island, 1741-1744.

• Krebber,

  J., Möller, S., Raake, A. (2004). Speech Input and Output Module

  Assessment for Remote Access to a Smart-Home Spoken Dialog System, in:

  Proc. 8th Int. Conf. on Spoken Language Processing (Interspeech 2004 -

  ICSLP), KR-Jeju Island, 2753-2756.

• Möller, S.,

  Raake, A., Barriac, V., Quinquis, C. (2004). Deriving Equipment

  Impairment Factors for Wideband Speech Codecs, presented at: ETSI

  Workshop on Wideband Speech Quality in Terminals and Networks:

  Assessment and Prediction, June 8-9, DE-Mainz, European

  Telecommunications Standards Institute, FR-Sophia Antipolis.

• Krebber,

  J., Möller, S., Pegam, R., Raake, A., Melichar, M., Rajman, M. (2004).

  Wizard of Oz Tests for a Dialogue System for Smart Homes, in: Proc. 7.

  Congrès Français d’Acoustique / 30. Dtsch. Jahrestg. f. Akust.

  (CFA/DAGA’04), FR-Strassburg, 1149-1150.

• Möller,

  S., Krebber, J., Raake, A. (2004). Performance of Speech Recognition

  and Synthesis in Packet-Based Networks, in: Proc. 8th Int. Conf. on

  Spoken Language Processing (Interspeech 2004 - ICSLP), KR-Jeju Island,

  1541-1544.

• Möller, S., Krebber, J., Raake, A.

  (2004). Einfluss von Paketverlusten auf die Qualität von

  Spracherkennung und Sprachsynthese, in: Elektronische

  Sprachsignalverarbeitung: Tagungsband der 15. Konferenz, K. Fellbaum

  (ed.), w.e.b. Universitätsverlag, DE-Dresden, 268-275.

• Möller,

  S., Krebber, J., Raake, A., Smeele, P., Rajman, M., Melichar, M.,

  Pallotta, V., Tsakou, G., Kladis, B., Vovos, A., Hoonhout, A.,

  Schuchardt, D., Fakotakis, N., Ganchev, T., Potamitis, I. (2004).

  INSPIRE: Evaluation of a Smart-Home System for Infotainment Management

  and Device Control, in: Proc. 4th Int. Conf. on Language Resources and

  Evaluation (LREC 2004), PT-Lisbon, Vol. 5, 1603-1606.

2003

• ITU-T

  Delayed Contribution D.178 (2003). E-Model: Additivity of Packet Loss

  Impairment with other Impairment Types, Federal Republic of Germany

  (Author: A. Raake), ITU-T SG 12 Meeting, 22-30 Sept. 2003, CH-Geneva.

• ITU-T

  Delayed Contribution D.179 (2003). E-Model: Average Quality vs. Quality

  as a Function of Average Packet Loss, Federal Republic of Germany

  (Author: A. Raake), ITU-T SG 12 Meeting, 22-30 Sept. 2003, CH-Geneva.

• Raake,

  A. (2003). Speech Quality of Heterogeneous Networks Involving VoIP: Are

  Time-Varying Impairments Additive to Classical Stationary Ones? In:

  Proc. 1st ISCA Tutorial and Research Workshop on Auditory Quality of

  Systems, DE-Herne, pp. 63-70.

• Raake, A. (2003).

  Time Varying Distortions and Traditional Telephony: Speech Quality

  under Combined Network Distortions, in: Fortschr. Akust. DAGA 2003,

  Dtsch. Ges. Akust., DE-Oldenburg.

• Krebber, J.,

  Raake, A., Möller, S. (2003). Modellierung der Einflüsse des

  Übertragungskanals bei der Interaktion mit einem Smart-Home-System, in:

  Fortschritte der Akustik – DAGA 2003: Plenarvortr. u. Fachbeitr. d. 29.

  Dtsch. Jahrestg. f. Akust., DE-Aachen, Dtsch. Ges. Akust.,

  DE-Oldenburg, 732-733.

2002

• Raake,

  A. (2002). Does the Content of Speech Influence its Perceived Sound

  Quality?, in: Proc. 3rd Int. Conf. on Language Resources and Evaluation

  (LREC 2002), ES-Las Palmas, Vol. 4, 1170-1176.

• Raake,

  A. (2002). Parameter-based Modelling of Speech Quality in Telephone

  Networks, in: Fortschr. Akust. DAGA 2002, Dtsch. Ges. Akust.,

  DE-Oldenburg.

• ITU-T Contribution COM 12-38

  (2002). Draft Revised Recommendation G.107, Federal Republic of Germany

  (Author: A. Raake), ITU-T SG12 Meeting, 27-31 May 2002, CH-Geneva.

• ITU-T

  Delayed Contribution D.052 (2002). Amendment to SG 12 COM-38 (Revision

  of G.107), Deutsche Telekom AG (Author: A. Raake), ITU-T SG12 Meeting,

  27-31 May 2002, CH-Geneva.

• Rehmann, S., Raake,

  A., Möller, S. (2002). Parametric Simulation of Impairments Caused by

  Telephone and Voice over IP Network Transmission, in: Proc. 3rd EAA

  Convention (Forum Acusticum 2002), ES-Sevilla.

• Möller,

  S., Raake, A. (2002). Telephone Speech Quality Prediction: Towards

  Network Planning and Monitoring Models for Modern Network Scenarios.

  Speech Communication, vol. 38, 47-75.

• Krebber,

  J., Möller, S., Raake, A., Rehmann, S., Berger, J., Johannsen, W.

  (2002). Ein Simulationssystem zur Untersuchung des Einflusses von

  Übertragungskanälen bei Smart-Home-Anwendungen, in: Elektronische

  Sprachsignalverarbeitung: Tagungsband der 13. Konferenz, R. Hoffmann

  (ed.), w.e.b. Universitätsverlag, DE-Dresden, 75-82.

2001

• Raake,

  A. (2001). Der Einfluss von Bedeutung auf die Wahrnehmung des Klangs

  von Sprache, in: Fortschr. Akust. DAGA 2001, Dtsch. Ges. Akust.,

  DE-Oldenburg.

• ITU-T Delayed Contribution D.044

  (2001). Modelling Impairment due to Packet-Loss for Application in the

  E-Model, Deutsche Telekom AG, Germany (Author: A. Raake), ITU-T SG 12

  Meeting, 22-26 Oct. 2001, SEN-Dakar.

• ITU-T

  Delayed Contribution D.012 (2001). Towards Enhancing the E-Model to

  Include Hands-Free Terminals: Subjective Assessment of Quality in

  Send-Direction and Additivity with Other Degradations, Deutsche Telekom

  AG (Author: A. Raake), ITU-T SG 12 Meeting

, 19-23 Feb. 2001, CH-Geneva.
• ITU-T

  Delayed Contribution D.011 (2001). The Quality of Bandpass-filtered

  Speech Assessed with Different Terminal Equipment: Implications for

  Wide-Band Studies, Deutsche Telekom AG (Author: A. Raake), ITU-T SG 12

  Meeting, 19-23 Feb. 2001, CH-Geneva.

2000

• Raake,

  A. (2000). Perceptual Dimensions of Speech Sound Quality in Modern

  Transmission Systems, in: Proc. ICSLP 2000, vol. 4, 744-747,

  CHN-Beijing.

• Möller, S., Jekosch, U., Raake, A.

  (2000). New Models Predicting Conversational Effects of Telephone

  Transmission on Speech Communication Quality, in: Proc. ICSLP 2000,

  vol. 2, 190-193, CHN-Beijing.

• Möller, S., Raake,

  A. (2000). Planung von Telefon-Sprachqualität: Unterschiedliche

  Modellansätze, in: Fortschr. Akust. DAGA 2000, 208-209, Dtsch. Ges.

  Akust., DE-Oldenburg.

1999

• Colla,

  E.L., Raake, A., Taylor, D.V., Setter, N. (1999). Exploring

  Polarisation Switching and Imprint in Fatigued Pt-PZT-Pt FECAPs by

  Atomic Force Microscopy, Integrated Ferroelectrics 27, 1-4, 1215-1222.

Talks and Presentations

• Raake,

  A. (2004). Models for Speech Quality Prediction in Telecommunications.

  Keynote lecture ftw. Member Tutorial “Improving the User Experience:

  Methods, Perspectives, and Case Studies”, Jan. 22nd, Telecommunications

  Research Center Vienna (ftw.), A-Vienna.

• Raake,

  A. (2004). Assessment and Prediction of Speech Quality under Packet

  Loss. Presented in the framework of the Telecommunications Forum, Jan.

  23rd, Telecommunications Research Center Vienna (ftw.), A-Vienna.

• Raake,

  A. (2002). Assessment and Prediction of Speech Quality under

  Time-Varying Distortions. NATO Advanced Study Institute (ASI) on the

  Dynamics of Speech Production and Perception, 24 June - 6 July 2002,

  I-Il Ciocco.

• Jekosch, U., Möller, S., Raake, A.

  (2001). Extensions of the E-Model, ITU-T SG12 Workshop on QoS and

  User-Perceived Transmission Quality in Evolving Networks, 18-19 Oct.

  2001, SEN-Dakar.

Teaching

• Studienprojekt

  (study project) “Röhrenmodell des Sprachtraktes“ (Tube Model of the

  Vocal Tract), Ruhr-University Bochum, 2003-2004

• Several Diplom / Master thesis supervisions (Germany and France)

Contributions to Teaching

• Course

  “Kommunikationsakustik II: Audiokommunikation und Virtuelle Realität”

  (Communication Acoustics II: Audio Communication and Virtual Reality),

  Ruhr-University Bochum, 2002-2003

• Seminar

  “Statistische Methoden der Spracherkennung” (Statistical Methods in

  Speech Recognition), Ruhr-University Bochum, 2002-2005

• Seminar

  “Statistische Methoden in der Psychoakustik und Sprachkommunikation”

  (Statistical Methods in Psychoacoustics and Speech Communication),

  Ruhr-University Bochum, 2001

• Praktikum “Kommunikationsakustik” (Communication Acoustics), Ruhr-University Bochum, 2001-2003
• Exercises “Grundlagen der Elektrotechnik” (Fundamentals of Electrical Engineering“), Ruhr-University Bochum, 1999-2003
• Exercises

  to: “Kommunikationsakustik I: Technische Grundlagen” (Communication

  Acoustics I: Technical Bases), Ruhr-University Bochum, 1999-2003

• Exercises

  to: “Kommunikationsakustik II: Audiokommunikation und Virtuelle

  Realität” (Communication Acoustics II: Audio Communication and Virtual

  Reality), Ruhr-University Bochum, 1999-2003

• Exercises

  to: “Kommunikationsakustik IV: Kommunikationsqualität in der

  Sprachtechnologie” (Communication Acoustics IV: Communication Quality

  in Speech Technology), Ruhr-University Bochum, 2001-2004