ISCA Archive Interspeech 2008
ISCA Archive Interspeech 2008

Speech enhancement based on novel two-step a priori SNR estimators

Md. Jahangir Alam, Douglas O'Shaughnessy, Sid-Ahmed Selouani

A widely used method to determine the a priori SNR from noisy speech is the decision directed (DD) approach, but the a priori SNR follows the a posteriori SNR with a delay of one frame in speech frames. As a consequence, the performance of the noise reduction system degrades. In order to overcome this artifact, we propose three computationally simple and efficient two-step methods based on the minimum mean square error (MMSE), the maximum a posteriori (MAP) and the joint MAP criteria for the estimation of the a priori SNR for speech enhancement. The proposed methods avoid the delay problem while keeping the advantages of the DD method. The performance of the proposed a priori SNR estimation methods are evaluated and compared with the conventional DD method by extensive objective quality measures and yield better results than the DD approach-based speech enhancement system.


doi: 10.21437/Interspeech.2008-167

Cite as: Alam, M.J., O'Shaughnessy, D., Selouani, S.-A. (2008) Speech enhancement based on novel two-step a priori SNR estimators. Proc. Interspeech 2008, 565-568, doi: 10.21437/Interspeech.2008-167

@inproceedings{alam08b_interspeech,
  author={Md. Jahangir Alam and Douglas O'Shaughnessy and Sid-Ahmed Selouani},
  title={{Speech enhancement based on novel two-step a priori SNR estimators}},
  year=2008,
  booktitle={Proc. Interspeech 2008},
  pages={565--568},
  doi={10.21437/Interspeech.2008-167}
}