KR100843926B1 - 고주파수 압축을 통한 음성 인식 향상 시스템 - Google Patents
고주파수 압축을 통한 음성 인식 향상 시스템 Download PDFInfo
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- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
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Abstract
Description
Claims (21)
- 처리 음성의 인지도 및 품질을 향상시키는 음성 시스템으로서:음성 신호를 주파수의 스펙트럼으로 변환시키는 주파수 변환기와;상기 주파수 변환기에 전기적으로 결합되어, 미리 선택된 고주파 대역을 압축하고, 그 압축된 고주파 대역을 낮은 대역 제한 주파수 범위로 매핑시키는 스펙트럼 압축기와,음성 신호 검출시 존재하는 노이즈의 레벨을 검출하고 또 상기 노이즈 레벨을 측정 또는 추정하도록 구성된 노이즈 검출기를 포함하는 것인 음성 시스템.
- 제1항에 있어서, 상기 주파수 변환기는 음성 신호를 그 주파수 스펙트럼으로 근접 실시간으로 자동 변환하도록 프로그래밍된 것인 음성 시스템.
- 제1항에 있어서, 상기 주파수 변환기는 음성 신호를 주파수의 스펙트럼으로 실시간으로 자동 변환하도록 프로그램밍 또는 구성된 것인 음성 시스템.
- 제1항에 있어서, 상기 고주파 대역은 상기 낮은 대역 제한 주파수 범위 보다 큰 주파수의 범위를 갖는 것인 음성 시스템.
- 제1항에 있어서, 상기 스펙트럼 압축기는 비선형 압축 기저 함수를 갖는 것인 음성 시스템.
- 제1항에 있어서, 상기 낮은 대역 제한 주파수 범위는 아날로그 대역의 부분을 갖는 것인 음성 시스템.
- 제1항에 있어서, 상기 낮은 대역 제한 주파수 범위는 전화 대역의 부분을 갖는 것인 음성 시스템.
- 삭제
- 삭제
- 제1항에 있어서, 독립적 외부 신호와 관련하여 압축된 고주파 대역의 이득을 조정하도록 구성된 이득 제어기를 더 포함하는 음성 시스템.
- 제10항에 있어서, 상기 독립적 외부 신호는 배경 노이즈를 포함하는 것인 음성 시스템.
- 제1항에 있어서, 상기 스펙트럼 압축기에 결합되는 이득 제어기를 더 포함하고, 상기 스펙트럼 압축기는 낮은 대역 제한 주파수 범위에서 상기 압축된 고주파 대역에 있어서의 거의 이득만을 조정하도록 구성되는 것인 음성 시스템.
- 제12항에 있어서, 상기 스펙트럼 압축기는 검출된 음성 신호에 독립적인 신호에 따라 변하는 복수의 이득 조정을 적용하도록 구성되는 것인 음성 시스템.
- 처리 음성의 인지도을 향상시키는 음성 시스템으로서:음성 신호를 그 주파수 도메인으로 변환시키는 주파수 변환기와;상기 주파수 변환기에 결합되어, 미리 선택된 고주파 대역을 압축하고, 상기 압축된 고주파 대역을 낮은 주파수 대역으로 매핑시키는 스펙트럼 압축기와;존재하는 노이즈의 레벨을 검출 및 추정하도록 구성된 노이즈 검출기와;독립적인 외부 신호의 레벨 변화에 비례하여 압축 고주파 대역의 이득을 조정하도록 구성된 이득 제어기를 포함하는 것인 음성 시스템.
- 제14항에 있어서, 상기 스펙트럼 압축기를 조절하는 제어기를 더 포함하고, 이 제어기는 압축된 신호의 신호 대 잡음비와 그 압축되기 전의 신호의 신호 대 잡음비를 비교하는 모니터를 포함하는 것인 음성 시스템.
- 제14항에 있어서, 상기 이득 제어기는 상기 외부 신호의 레벨 변화에 따라 변하는 이득을 적용하도록 구성되는 것인 음성 시스템.
- 제14항에 있어서, 상기 이득 제어기는 압축된 신호의 레벨이 독립적인 외부 신호의 레벨과 실질적으로 일치하도록 하는 가변 이득을 적용하도록 구성되는 것인 음성 시스템.
- 처리 음성의 인지도을 향상시키는 음성 시스템으로서:음성 신호를 시간 도메인에서 주파수 도메인으로 실시간으로 변환시키는 주파수 변환기와;상기 주파수 변환기에 결합되어, 미리 선택된 고주파 대역을 압축하고, 그 압축된 고주파 대역을 전화 통과 대역 내의 낮은 주파수 대역으로 매핑시키는 스펙트럼 압축기와;음성 신호의 배경 노이즈 레벨을 검출 및 측정하도록 구성된 노이즈 검출기와;상기 배경 노이즈 레벨과 관련하여 가변 이득을 압축된 고주파 대역에 적용하도록 구성된 이득 제어기를 포함하는 것인 음성 시스템.
- 제18항에 있어서, 통신 버스를 통해 스펙트럼 압축기를 조절하는 제어기를 더 포함하고, 이 제어기는 검출된 음성 신호의 일부의 신호 대 잡음비와 압축된 신호의 일부의 신호 대 잡음비를 비교하는 것인 음성 시스템.
- 제19항에 있어서, 상기 제어기는 주파수 빈의 비교를 통해 진폭을 비교하도록 프로그래밍된 것인 음성 시스템.
- 제19항에 있어서, 상기 이득 제어기에 결합된 자동 음성 인식 시스템을 더 포함하는 음성 시스템.
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US11/298,053 | 2005-12-09 | ||
US11/298,053 US8086451B2 (en) | 2005-04-20 | 2005-12-09 | System for improving speech intelligibility through high frequency compression |
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US (2) | US8086451B2 (ko) |
EP (2) | EP1796082A1 (ko) |
JP (2) | JP2007164169A (ko) |
KR (1) | KR100843926B1 (ko) |
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US8219389B2 (en) | 2012-07-10 |
US20120095759A1 (en) | 2012-04-19 |
JP2011141551A (ja) | 2011-07-21 |
JP5463306B2 (ja) | 2014-04-09 |
CA2569221C (en) | 2013-02-19 |
EP1796082A1 (en) | 2007-06-13 |
CN101030382A (zh) | 2007-09-05 |
US8086451B2 (en) | 2011-12-27 |
EP3089162B1 (en) | 2018-01-31 |
KR20070061360A (ko) | 2007-06-13 |
EP3089162A1 (en) | 2016-11-02 |
CA2569221A1 (en) | 2007-06-09 |
US20060241938A1 (en) | 2006-10-26 |
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