Reconfigurable acceleration of microphone array algorithms for speech enhancement

Microphone arrays play an important role in noise reduction and speech enhancement. Their algorithms are based on beamforming, which reduces the level of localized and ambient noise signals while minimizing distortion to speech from the desired direction via spatial filtering. This paper describes a class of subband beamforming algorithms. The similarity between different algorithms is discussed. To enhance computational efficiency, the algorithms are implemented in frequency domain. A hardware architecture, with bitwidth optimization, is proposed to support the algorithms. An implementation with 7 instances on

• Type: Conference
• Year: 2008
• Where: ASAP
• Authors: Ka Fai Cedric Yiu, Chun Hok Ho, Nedelko Grbic, Yao Lu, Xiaoxiang Shi, Wayne Luk
• Keywords: Algorithms, Ambient Noise Signals, ASAP 2008, Hardware, Subband Beamforming Algorithms