EUROSPEECH 2001 Scandinavia
7th European Conference on Speech Communication and Technology

Aalborg, Denmark
September 3-7, 2001


Detection of Digital Transmission Systems for Voice Quality Measurements

Thorsten Ludwig, Ulrich Heute

Christian-Albrechts University of Kiel, Germany

In-service, Non-intrusive Measurement Devices (INMD) estimate the perceived quality of the telephone link by extracting quality-defining criteria like echo attenuation, echo delay, active speech level, noise level, frame losses and transient failures from a telephone call. In addition, the quality depends on the used digital transmission systems (codec systems). This paper proposes a method to distinguish between two codec classes. With the help of features determined from the speech signal, a classifier decides about the class affiliation of the signal. The recognition rate for signals with 16 seconds of active speech is about 97%.

Full Paper

Bibliographic reference.  Ludwig, Thorsten / Heute, Ulrich (2001): "Detection of digital transmission systems for voice quality measurements", In EUROSPEECH-2001, 1699-1702.