Webbläsaren som du använder stöds inte av denna webbplats. Alla versioner av Internet Explorer stöds inte längre, av oss eller Microsoft (läs mer här: * https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Var god och använd en modern webbläsare för att ta del av denna webbplats, som t.ex. nyaste versioner av Edge, Chrome, Firefox eller Safari osv.

Optimal and Adaptive Microphone Arrays for Speech Input in Automobiles

In English

Författare

  • Sven Nordholm
  • Ingvar Claesson
  • Nedelko Grbic

Redaktör

  • Michael Brandstein
  • Darren Ward

Summary, in English

In this chapter, speech enhancement and echo cancellation for hands-free mobile telephony are discussed. A number of microphone array methods have been tested and results from car measurements are given. Traditional methods such as linearly constrained beamforming and generalized sidelobe cancelers are discussed as well as array gain optimization methods. An in situ calibrated method which gives an overall improved performance is also presented. Algorithms such as Least-Squares (LS) and Normalized-Least-Mean-Squares (NLMS) are used to find optimal weights. Improved performance using an LS-method is shown, but at the cost of increased numerical complexity limiting its implementation in real-time applications. By introducing subband processing this issue can be avoided. The results show a noise suppression of approximately 18 dB and hands-free loudspeaker suppression of the same order.

Publiceringsår

2001

Språk

Engelska

Sidor

307-329

Publikation/Tidskrift/Serie

Digital Signal Processing

Dokumenttyp

Del av eller Kapitel i bok

Förlag

Springer

Ämne

  • Signal Processing

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1612-1457
  • ISBN: 978-3-662-04619-7
  • ISBN: 978-3-540-41953-2
  • ISBN: 978-3-642-07547-6