14th International Congress of Phonetic Sciences (ICPhS-14) San Francisco, CA, USA August 1-7, 1999

Text-Independent Forensic Speaker Identification Using Telephone Speech

J. S. Bouten, A. P. A. Broeders

Netherlands Forensic Institute, Rijswijk, the Netherlands

On several occasions we have been asked by police officials whether it is feasible for investigative purposes to automatically identify a speaker using speech from intercepted telephone conversations. Since forensic phoneticians are typically not involved in speaker identification but in speaker verification we tend to reformulate this questioni n: Is it feasiblef or investigativep urposest o automatically verify a speaker's identity using a database built from intercepedt elephonec onversations?
   This paper presents an experiment in which a closed set text independent speaker identification method is tested on telephone speech.T he speechd atabaseu sed was built from telephones peech recorded for investigative purposes.
   The distance measure used for the speaker recognition is related to second order statistical tests. It is expressed as a function of the eigenvalues of a test covariance matrix relative to a training covariance matrix. The text independent recognition technique is based on distance measures developed by Bimbot and Mathan in 1995.

Full Paper

Bibliographic reference.  Bouten, J. S. / Broeders, A. P. A. (1999): "Text-independent forensic speaker identification using telephone speech", In ICPhS-14, 1377-1380.