Matthias Kleinert
German Aerospace Center
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Publication
Featured researches published by Matthias Kleinert.
spoken language technology workshop | 2014
Anna Schmidt; Youssef Oualil; Oliver Ohneiser; Matthias Kleinert; Marc Schulder; Arif Khan; Hartmut Helmke; Dietrich Klakow
This paper presents an approach for incorporating situational context information into an on-line Automatic Speech Recognition (ASR) component of an Air Traffic Control (ATC) assistance system to improve recognition performance. Context information is treated as prior information to reduce the search space for recognition. It is integrated in the ASR pipeline by continually updating the recognition network. This is achieved by automatically adapting the underlying grammar whenever new situational knowledge becomes available. The context-dependent recognition network is then re-created and substituted for recognition based on these context-dependent grammars. As a result, the recognizers search space is constantly being limited to that subset of hypotheses that are deemed plausible in the current situation. Since recognition and adaptation tasks can be easily performed by two separate parallel processes, on-line capabilities of the system are maintained, and response times do not increase as a result of context integration. Experiments conducted on about two hours of ATC data show a reduction in command error rate by a factor of three when context is used.
Archive | 2013
Hartmut Helmke; Heiko Ehr; Matthias Kleinert; Friedrich Faubel; Dietrich Klakow
ieee aiaa digital avionics systems conference | 2016
Tim H. Stelkens-Kobsch; Michael Finke; Matthias Kleinert; Meilin Schaper
ieee aiaa digital avionics systems conference | 2015
Hejar Gürlük; Hartmut Helmke; Matthias Wies; Heiko Ehr; Matthias Kleinert; Thorsten Mühlhausen; Kathleen Muth; Oliver Ohneiser
conference of the international speech communication association | 2018
Ajay Srinivasamurthy; Petr Motlicek; Mittul Singh; Youssef Oualil; Matthias Kleinert; Heiko Ehr; Hartmut Helmke
University of Belgrade - Proceedings of the 7th SESAR Innovation Days (SID) | 2017
Matthias Kleinert; Hartmut Helmke; Gerald Siol; Heiko Ehr; Michael Finke; Youssef Oualil; Ajay Srinivasamurthy
Archive | 2017
Oliver Ohneiser; Matthias Kleinert
Archive | 2017
Hartmut Helmke; Matthias Wies; Oliver Ohneiser; Matthias Kleinert; Heiko Ehr; Thorsten Mühlhausen; André Tews
Archive | 2016
Oliver Ohneiser; Matthias Kleinert; Malte-Levin Jauer; Heiko Ehr; Maria Uebbing-Rumke
Archive | 2016
Hartmut Helmke; Oliver Ohneiser; Matthias Wies; Matthias Kleinert