Wire Communications Laboratory (WCL),
Electrical & Computer Engineering Department
University of Patras, GR

Experience and Competence

The Wire Communications Laboratory (WCL) was established in 1970 in the Electrical Engineering and Computer Technology Department (EECT) of the University of Patras. It currently has a staff of approximately 40 researchers, support personnel and post-graduate students and is housed in the new building of the EECT Department at the campus in Rion/ Patras. The WCL is active in three main areas with organised R&D teams: Telecommunications, Speech & Natural Language Technology and Audio & Electroacoustics. Its research activity is mainly application oriented. In the Speech & Natural Language Technology area, R&D includes speech recognition and synthesis for the Greek language in particular, speech coding and enhancement, linguistic processing of texts, loudspeaker/room acoustics equalisation and psychoacoustics.
The WCL co-operates with Greek and foreign firms and is a partner in several projects supported by the EEC, the Greek Ministry of Industry, the Regional Administration, etc. WCL has participated in many projects: some of the more recent are: DIALOGOS (EPET II) Improvement of man-machine communication using linguistic technologies. (1995-1998), YPER: Digital Audio Equalisation Methods for Loudspeaker Applications (1996-1998), SPEECH DAT (LE-2 XXXX) (From 1996), IDAS (LE-38315): "Interactive,Telephone-based, Directory Assistance Services" (from 1998), TMR SPHEAR: Speech and Hearing Representations, (from 1997), SPEECHDAT-CAR  (LE-8334): "Speech Data Basis for Voice Driven Teleservices and Control in Automotive Environments" (from 1998).

Role in the Network

The Patras group role within the network is to contribute expertise in the areas of Digital Signal Processing, perceptually-based acoustic signal enhancement, room acoustics and reverberation analysis and modeling, de-reverberation of signal and speech recognition.

Research Linkages

In SPHEAR, Patras has collaborated closely with Bochum exchanging young researchers who have progressed very satisfactorily for the completions of their Ph.D theses, and established good relationships with most of the HOARSE partners, with visits of young researchers to IDIAP, Sheffield and Keele and collaboration with Daimler-Chrysler in the assessment of pre-processing methods.

Principal research personnel, expertise and involvement

  • Dr George Kokkinakis (Professor) received the Diploma in Electrical Engineering (Dipl.-Ing.) in 1961, the Doctor's Degree in Engineering (Dr.-Ing) in 1966 and the Diploma in Engineering Economics (Dipl.-Wirt.-Ing) in 1967, all from the Technical University of Munich. His current activity in R&D, includes the analysis, synthesis, recognition and linguistic processing of the Greek language and the design and optimisation of telecom networks. Dr John Mourjopoulos (Associate Professor) received a B.Sc. from Coventry University (UK) in Combined Engineering in 1977, an M.Sc. in Acoustics from Southampton University (UK) in1978 and a Ph.D. in Digital Signal Processing and Acoustics from Southampton University (UK) in 1984. His current scientific interests are in the areas of digital audio system equalisation, digital audio amplification, audio coding, audio and speech enhancement, psychoacoustics and hearing models.


    Recent Publications

  • Tsoukalas D.,Mourjopoulos J., Kokkinakis G., “Speech Enhancement based on Audible Noise Suppression (ANS)”, IEEE Trans. Speech and Audio Proc., Vol.5, No.6, pp.497-514, Nov. 1997.
  • Hatziantoniou P., Mourjopoulos J., “Generalized Fractional Octave Smoothing of Audio / Acoustic Responses”, Journal of the Audio Engineering Society, Vol.48, No.4, pp.259-280, Apr.2000.