11th Annual Conference of the International Speech Communication Association

Makuhari, Chiba, Japan
September 26-30. 2010

Quality Conversion of Non-Acoustic Signals for Facilitating Human-to-Human Speech Communication Under Harsh Acoustic Conditions

Seyed Omid Sadjadi, Sanjay A. Patil, John H. L. Hansen

University of Texas at Dallas, USA

Harsh acoustic conditions limit the effectiveness of human speech communication to a great extent. There is a consensus that even at moderate SNR levels, traditional speech enhancement techniques tend to improve the perceptual quality of speech rather than its intelligibility. As an alternative, non-acoustic contact sensors have recently been developed for noise-robust signal capture. Although relatively immune to ambient noise, due to alternative pickup location and non-acoustic principle of operation, signals measured from these sensors are of lower speech quality and intelligibility when compared to those obtained from a conventional microphone in clean conditions. To facilitate human-to-human speech communication under acoustically adverse environments, in this study we present and evaluate a probabilistic transformation framework to improve perceptual quality and intelligibility of signals acquired from one such sensor entitled: physiological microphone (PMIC). Results from both objective and subjective tests confirm that incorporating this framework as a post-processing stage yields significant improvement in overall quality and intelligibility of PMIC signals.

Full Paper

Bibliographic reference.  Sadjadi, Seyed Omid / Patil, Sanjay A. / Hansen, John H. L. (2010): "Quality conversion of non-acoustic signals for facilitating human-to-human speech communication under harsh acoustic conditions", In INTERSPEECH-2010, 1624-1627.