書誌事項
- タイトル別名
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- Improvement of Bone-Conducted Speech Based on Codebook-Mapping
- コードブックマッピング ニ ヨル コツドウ オンセイ ノ オンシツ カイゼン
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抄録
Environmental noise is an inevitable obstacle for any speech-signal proccesing-based systems. Although bone-conducted microphone, which is robust for external noise, seems “a panacea for this syndrome”, quality of bone-conducted speech is deteriorated due to suppression of its high frequency component. Therefore, to comfort bone-conducted speech communication, signal proccesing to ease the deteration is indispensable. This paper proposed a method to improve quality of bone-conducted speech by restoring its high frequency component. The authors compared spectrum envelop of bone-conducted speech with that of air-conducted speech with cepstrum analysis, and revealed that replacement of spectrum envelop of bone-conducted speech with that of air-conducted speech can compensate the high frequency component of bone-conducted speech. Consequently, to apply spectrum envelop replacement for each phonemes appropriately, the authors designed a system using codebook-mapping which corresponds to given bone-conducted speech by each phonemes. Prototype of proposed speech enhancer was evaluated with cepstrum distance and hearing test. The evaluation ensured the prototype is enable to enhance bone-conducted speech especially to voiced speech. The proposed method may contributes to realize applications using speech signal under various environments.
収録刊行物
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- 生体医工学
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生体医工学 46 (6), 621-628, 2008
公益社団法人 日本生体医工学会
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詳細情報 詳細情報について
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- CRID
- 1390282680244057472
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- NII論文ID
- 110007098791
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- NII書誌ID
- AA11633569
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- ISSN
- 18814379
- 1347443X
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- NDL書誌ID
- 10179485
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可