Speech distortion weighted multi-channel Wiener filter and its application to speech recognition

IEICE Electronics Express

Gibak Kim¹ 

[1] School of Electrical Engineering, Soongsil University

关键词: multi-channel Wiener filter;    SDW-MWF;    noise reduction;    speech recognition;    microphone array;   

DOI  :  10.1587/elex.12.20150063

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(9)The speech distortion weighted multi-channel Wiener filter (SDW-MWF) is considered to control the tradeoff between noise reduction and speech distortion. In a single target speech source, speech correlation matrix can be assumed to be rank-1 in the implementation of the SDW-MWF. We evaluate the rank-1 SDW-MWF as a pre-processor of speech recognizer and discuss regarding optimal distortion weight. We also propose a modified SDW-MWF providing a full range control of speech distortion as well as outperforming the rank-1 SDW-MWF. The experimental results show that aggressive noise reduction strategy is preferable for maximizing the performance of speech recognizer. The results also show that the proposed filter performs better than the conventional rank-1 SDW-MWF.

【 授权许可】

Unknown