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Soft Constrained Subband Beamforming for Hands-Free Speech Enhancement

In English

Författare

  • Nedelko Grbic
  • Sven Nordholm

Summary, in English

This paper introduces a new constrained adaptive subband beamformer algorithm for speech enhancement in acoustic telecommunication systems. The solution relies on a pre-calculated source covariance matrix and recursive estimates of background noise- and handsfree signal covariance matrices. The constraint acts as an eye-opening in a vicinity of the near-field location of the source and degradations from steering-vector errors can therefor be made small. The algorithm is applied in subbands using a uniform multi channel over-sampled filterbank. Simulations with real speech recorded in an automobile hands-free environment show 19 dB noise reduction and 20 dB hands-free suppression.

Publiceringsår

2002

Språk

Engelska

Sidor

885-888

Publikation/Tidskrift/Serie

Acoustics, Speech, and Signal Processing (ICASSP), 2002 IEEE International Conference on

Volym

1

Dokumenttyp

Konferensbidrag

Ämne

  • Signal Processing

Conference name

IEEE International Conference on Acoustics, Speech and Signal Processing, 2002

Conference date

2002-05-13 - 2002-05-17

Conference place

Orlando, FL, United States

Status

Published

ISBN/ISSN/Övrigt

  • ISBN: 0-7803-7402-9