Study on method for protecting speech privacy by actively controlling speech transmission index in simulated room

Masashi Unoki, Yuta Kashihara, Maori Kobayashi, Masato Akagi

研究成果: Conference contribution

3 被引用数 (Scopus)

抄録

Protecting speech privacy in a specific room is an important challenge in room acoustics. However, protecting people's conversation from being overheard by an unintended listener, that is, making them not understandable, is difficult. This paper proposes a method for protecting speech privacy by actively controlling the speech transmission index (STI) in a simulated room containing an unintended listener. In this method, the STI in the simulated room can be controlled by manipulating the parameters of the simulated room impulse response (RIR). We can control the STI by convolving speech with the simulated RIR because the presentation of speech and additive delayed-manipulated speech can be regarded as the convolution of speech with late reverberation in the simulated room. Three experiments (world intelligibility, listening difficulty, and annoyance tests) were conducted to compare the proposed method with two conventional methods (noise masking and reverberation). The results showed that speech privacy can be protected by controlling STI derived by manipulating the simulated RIR. The results also showed that the proposed method can protect the privacy of conversations as effectively as those other methods can by using lower noise levels and shorter reverberation.

本文言語English
ホスト出版物のタイトルProceedings - 9th Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA ASC 2017
出版社Institute of Electrical and Electronics Engineers Inc.
ページ1199-1204
ページ数6
ISBN(電子版)9781538615423
DOI
出版ステータスPublished - 2018 2 5
外部発表はい
イベント9th Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA ASC 2017 - Kuala Lumpur, Malaysia
継続期間: 2017 12 122017 12 15

出版物シリーズ

名前Proceedings - 9th Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA ASC 2017
2018-February

Other

Other9th Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA ASC 2017
国/地域Malaysia
CityKuala Lumpur
Period17/12/1217/12/15

ASJC Scopus subject areas

  • 人工知能
  • 人間とコンピュータの相互作用
  • 情報システム
  • 信号処理

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