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- W2026459719 abstract "One of the main applications of Blind Source Separation (BSS) is to improve performance of Automatic Speech Recognition (ASR) systems. However, conventional BSS algorithm has been applied only to speech signals as a pre-processing approach. In this paper, a closely coupled framework between FDICA-based BSS algorithm and speech recognition system is proposed. In the source separation step, a confidence score of the separation accuracy for each frequency bin is first estimated. Subsequently, by employing multi-band speech recognition system, acoustic likelihood is calculated from the estimated BSS confidence scores and Mel-scale filter bank energy. Therefore, our proposed method can reduce ASR errors which caused by separation errors in BSS and permutation errors in ICA, as in the conventional approach. Experimental results showed that our proposed method improved word accuracy of ASR by approximately 10%." @default.
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- W2026459719 date "2012-04-01" @default.
- W2026459719 modified "2023-09-25" @default.
- W2026459719 title "Multi-band speech recognition using band-dependent confidence measures of blind source separation" @default.
- W2026459719 doi "https://doi.org/10.1121/1.4708069" @default.
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