Audio Pre-Processing and Beamforming Implementation on Embedded Systems

Jian Hong Wang, Phuong Thi Le, Shih Jung Kuo, Tzu Chiang Tai, Kuo Chen Li, Shih Lun Chen, Ze Yu Wang, Tuan Pham, Yung Hui Li, Jia Ching Wang

研究成果: 雜誌貢獻期刊論文同行評審

摘要

Since the invention of the microphone by Barina in 1876, there have been numerous applications of audio processing, such as phonographs, broadcasting stations, and public address systems, which merely capture and amplify sound and play it back. Nowadays, audio processing involves analysis and noise-filtering techniques. There are various methods for noise filtering, each employing unique algorithms, but they all require two or more microphones for signal processing and analysis. For instance, on mobile phones, two microphones located in different positions are utilized for active noise cancellation (one for primary audio capture and the other for capturing ambient noise). However, a drawback is that when the sound source is distant, it may lead to poor audio capture. To capture sound from distant sources, alternative methods, like blind signal separation and beamforming, are necessary. This paper proposes employing a beamforming algorithm with two microphones to enhance speech and implementing this algorithm on an embedded system. However, prior to beamforming, it is imperative to accurately detect the direction of the sound source to process and analyze the audio from that direction.

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文章編號2784
期刊Electronics (Switzerland)
13
發行號14
DOIs
出版狀態已出版 - 7月 2024

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