Acoustic Array Processing for Speech Enhancement

Buck, Markus; Hänsler, Eberhard; Krini, Mohamed; Schmidt, Gerhard; Wolff, Tobias

doi:10.1002/9780470487068.ch8

Cited by 4 publications

(2 citation statements)

References 39 publications

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“…It could also include the directivity of loudspeakers and microphones which is not considered here. 2 Originally, the authors used the SPR for speaker activity detection.…”

Section: Energy-based Speech Zone Detectionmentioning

confidence: 99%

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Model-Based Estimation of in-Car-Communication Feedback Applied to Speech Zone Detection

Müller¹,

Doclo

Østergaard

et al. 2022

2022 International Workshop on Acoustic Signal Enhancement (IWAENC)

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Modern cars provide versatile tools to enhance speech communication. While an in-car communication (ICC) system aims at enhancing communication between the passengers by playing back desired speech via loudspeakers in the car, these loudspeaker signals may disturb a speech enhancement system required for hands-free telephony and automatic speech recognition. In this paper, we focus on speech zone detection, i.e. detecting which passenger in the car is speaking, which is a crucial component of the speech enhancement system. We propose a modelbased feedback estimation method to improve robustness of speech zone detection against ICC feedback. Specifically, since the zone detection system typically does not have access to the ICC loudspeaker signals, the proposed method estimates the feedback signal from the observed microphone signals based on a free-field propagation model between the loudspeakers and the microphones as well as the ICC gain. We propose an efficient recursive implementation in the short-time Fourier transform domain using convolutive transfer functions. A realistic simulation study indicates that the proposed method allows to increase the ICC gain by about 6 dB while still achieving robust speech zone detection results.

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“…It could also include the directivity of loudspeakers and microphones which is not considered here. 2 Originally, the authors used the SPR for speaker activity detection.…”

Section: Energy-based Speech Zone Detectionmentioning

confidence: 99%

“…The former applications are designed for communication with external parties and require speech enhancement, e.g. beamforming or noise reduction [1][2][3]. On the other hand, ICC systems are designed to enhance speech intelligibility between passengers by reinforcing desired speech signals in the car cabin [4][5][6].…”

Section: Introductionmentioning

confidence: 99%