Effective speech suppression using a two-channel microphone array for privacy protection in face-to-face sales monitoring
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- Ichikawa Osamu
- IBM Research
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- Fukuda Takashi
- IBM Research
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- Tachibana Ryuki
- IBM Research
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説明
In the financial industry, face-to-face conversation is an essential for sales. Similar to call-center monitoring, there is a significant need to monitor the conversation for compliance checks. In certain business scenarios, there is a need to record an employee's speech while protecting the customers' confidentiality and privacy. In this paper, we propose a small-scale microphone array system specially designed to record only the agent's speech. For the suppression of the customer's speech, we used CSP-based post-filtering. However, using small number of microphones, it is difficult to suppress unwanted speech completely. Because post-filtering using correlations of the multiple channels often affected by the spatial aliasing between speakers. We introduced the weighted-CSP to attenuate susceptible bins to the interfering speaker. Also we introduced flooring after the post-filtering to mask residuals. This combination helps prevent the customer's speech to be transcribed.
収録刊行物
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- Acoustical Science and Technology
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Acoustical Science and Technology 36 (6), 507-515, 2015
一般社団法人 日本音響学会
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詳細情報 詳細情報について
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- CRID
- 1390001205088646144
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- NII論文ID
- 130005106793
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- NII書誌ID
- AA11501808
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- ISSN
- 13475177
- 03694232
- 13463969
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- NDL書誌ID
- 026833570
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 使用不可