Simultaneous Echo Cancellation and Car Noise Suppression Employing a Microphone Array

• This paper presents a method to simultaneously perform 20 dB acoustic echo cancellation and 15-20 dB speech enhancement using an adaptive microphone array combined with spectral subtraction. Primarily intended for handsfree telephones in automobiles, the microphone array system simultaneously emphasizes the near-end talker and suppresses the handsfree loudspeaker and the broadband car noise. The array system is based on a fast and efficient on-site calibration and can be used in other situations such as conventional speaker phones.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik -- Signalbehandling (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering -- Signal Processing (hsv//eng)

Nyckelord

acoustic noise

acoustic signal processing

acoustic transducer arrays

adaptive signal processing

array signal processing

automobiles

calibration

direction-of-arrival estimation

echo suppression

microphones

noise abatement

radiotelephony

speech enhancement

telephony

Publikations- och innehållstyp

ref (ämneskategori)

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