Abstract:
Three microphones are integrated into safety belts of the car placed over the shoulder and chest of the passenger after fastening the belt. These so-called belt microphon...Show MoreMetadata
Abstract:
Three microphones are integrated into safety belts of the car placed over the shoulder and chest of the passenger after fastening the belt. These so-called belt microphones have proven to be an elegant and intriguing alternative to conventional microphones used for speech communications in automobiles. Compared to usual microphone positions, belt microphones achieve an improved signal-to-noise ratio (SNR) for being placed closest to the passenger's mouth. State-of-the-art systems often select only the microphone with the highest SNR on the belt as an input to the subsequent speech enhancement schemes. To further improve the performance all belt microphones can be combined to generate an enhanced output. This contribution proposes a low-complexity and robust adaptive beamformer-postfilter system with special focus on its efficient and real-time implementation on a SHARC ADSP-21489 hardware. The system designed for belt microphones is benchmarked and its overall performance is evaluated and compared with the single best microphone on the belt in terms of SNR and SIR (signal-to-interference ratio).
Date of Conference: 17-20 September 2018
Date Added to IEEE Xplore: 04 November 2018
ISBN Information: