Improvement in speech recognition using phone-based filter and sum parameter optimization

IEICE Electronics Express

Farbod Razzazi²  Bahram Kouhi-Jelehkaran²  Hamidreza Bakhshi¹ 

[1] Electrical Engineering Department, Shahed University;Electrical Engineering Department, Islamic Azad University, Science and Research Branch Hesarak

关键词: robust speech recognition;    microphone array processing;    filter and sum;    maximum likelihood optimization;   

DOI  :  10.1587/elex.6.437

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(7)Cited-By(1)Because of noise and reverberation, accuracy of speech recognition systems decreases when the distance between talker and microphone increases. In this paper a new method for microphone array processing is proposed in which parameters of array processing are adjusted in calibration phase based on phones used in language and maximum likelihood method. Optimum filter length first studied and then optimized filter parameters are stored and used during recognition phase. A new modified Viterbi algorithm using optimal phone-based filter parameters is introduced for recognition phase. The proposed algorithm is analytically formulated and improvement in recognition accuracy in various noise level and reverberation time is studied.

【 授权许可】

Unknown