KR20060061259A - 잔향 추정 및 억제 시스템 - Google Patents
잔향 추정 및 억제 시스템 Download PDFInfo
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- KR20060061259A KR20060061259A KR1020050116299A KR20050116299A KR20060061259A KR 20060061259 A KR20060061259 A KR 20060061259A KR 1020050116299 A KR1020050116299 A KR 1020050116299A KR 20050116299 A KR20050116299 A KR 20050116299A KR 20060061259 A KR20060061259 A KR 20060061259A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
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Claims (20)
- 잔향 억제 시스템으로서,신호의 제1 주파수 대역에서 제1 잔향 특성을 식별하도록 동작하는 신호 분석 로직; 및상기 신호 분석 로직에 응답하여, 상기 제1 주파수 대역에서의 상기 신호를 감쇄하도록 동작 가능한 감쇄 로직를 구비하는 잔향 억제 시스템.
- 제 1 항에 있어서, 상기 제1 잔향 특성은 상기 제1 주파수 대역에서의 대략적으로 선형인 감쇄율(decay rate)인 것인, 잔향 억제 시스템.
- 제 1 항에 있어서, 상기 제1 잔향 특성은, 제1 잔향 감쇄율 임계값과 대략 만족하는 상기 제1 주파수 대역에서의 감쇄율인 것인, 잔향 억제 시스템.
- 제 3 항에 있어서, 상기 제1 잔향 감쇄율 임계값은 밀폐된 공간의 잔향 감쇄율 임계값인 것인, 잔향 억제 시스템.
- 제 3 항에 있어서, 상기 제1 잔향 감쇄율 임계값은 차량 내부의 잔향 감쇄율 임계값인 것인, 잔향 억제 시스템.
- 제 2 항에 있어서, 상기 제1 잔향 특성은 상기 제1 주파수 대역에서의 시간에 대한 dB에 있어서 대략적으로 선형인 쇠퇴인 것인, 잔향 억제 시스템.
- 제 1 항에 있어서,상기 신호 분석 로직은 제2 주파수 대역에서의 제2 잔향 특성을 식별하도록 더 동작 가능하고,상기 감쇄 로직은 또한 상기 제2 주파수 대역에서의 상기 신호를 응답적으로 감쇄하도록 동작 가능한 것인, 잔향 억제 시스템.
- 제 3 항에 있어서,상기 신호 분석 로직은, 제2 주파수 대역에서, 제2 잔향 감쇄율 임계값과 대략적으로 만족하는 제2 감쇄율을 구비하는 제2 잔향 특성을 식별하도록 더 동작 가능하고,상기 감쇄 로직은 또한 상기 제2 주파수 대역에서의 상기 신호를 응답적으로 감쇄하도록 동작 가능한 것인, 잔향 억제 시스템.
- 제 8 항에 있어서, 상기 제1 잔향 감쇄율 임계값 및 상기 제2 잔향 감쇄율 임계값은 주파수 대역 임계값들인 것인, 잔향 억제 시스템.
- 제 1 항에 있어서, 신호-대-잡음 비 로직을 더 구비하며, 상기 신호-대-잡음 비 로직이 양의 신호-대-잡음 비를 결정할 때, 상기 신호 분석 로직이 상기 잔향 특성을 식별하는 것인, 잔향 억제 시스템.
- 제 1 항에 있어서, 상기 제1 주파수 대역에서의 예측된 잔향 감쇄율의 추정값을 제공하도록 동작 가능한 적응성 필터 로직을 더 구비하는 것인, 잔향 억제 시스템.
- 잔향 억제 방법으로서,주파수 대역들로의 신호의 분할을 결정하는 단계;상기 주파수 대역들 중 적어도 하나의 주파수 대역에 존재하는 잔향 특성을 식별하는 단계;상기 잔향 특성에 기초하여 잔향 주파수 대역을 식별하는 단계; 및상기 잔향 주파수 대역에서의 상기 신호를 감쇄시키는 단계를 구비하는 잔향 억제 방법.
- 제 12 항에 있어서, 상기 잔향 특성을 식별하는 단계는, 신호 감쇄율을 결정하는 단계를 구비하는 것인, 잔향 억제 방법.
- 제 12 항에 있어서, 상기 잔향 특성을 식별하는 단계는, 신호 감쇄율이 잔향 감쇄율 임계값과 대략 만족하는지의 여부를 판정하는 단계를 구비하는 것인, 잔향 억제 방법.
- 제 12 항에 있어서, 상기 잔향 특성을 식별하는 단계는,상기 주파수 대역들 각각에서의 신호 감쇄율을 결정하는 단계;각 주파수 대역이 잔향 주파수 대역인지의 여부를 그 신호 감쇄율에 기초하여 판정하는 단계; 및각 잔향 주파수 대역을 감쇄시키는 단계를 구비하는 것인, 잔향 억제 방법.
- 제 12 항에 있어서, 상기 잔향 특성을 식별하는 단계는, 신호 감쇄율이 선형인지의 여부를 판정하는 단계를 구비하는 것인, 잔향 억제 방법.
- 제 15 항에 있어서, 상기 식별 단계는, 상기 신호 감쇄율이 잔향 감쇄율 임계값과 대략 만족하는지의 여부를 판정하는 단계를 더 구비하는 것인, 잔향 억제 방법.
- 제 14 항에 있어서, 상기 잔향 감쇄율 임계값은 밀폐된 공간의 잔향 감쇄율 임계값인 것인, 잔향 억제 방법.
- 제 14 항에 있어서, 상기 제1 잔향 감쇄율 임계값은 차량 내부의 잔향 감쇄율 임계값인 것인, 잔향 억제 방법.
- 기계 판독가능 매체; 및프로세스가 제 12 항 내지 제 19 항 중 어느 한 항에 기재된 방법을 수행하도록 하는 상기 기계 판독가능 매체에 기억되는 기계 판독가능 명령들을 구비하는 제품.
Applications Claiming Priority (2)
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US11/002,328 US8284947B2 (en) | 2004-12-01 | 2004-12-01 | Reverberation estimation and suppression system |
US11/002,328 | 2004-12-01 |
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KR20060061259A true KR20060061259A (ko) | 2006-06-07 |
KR100750440B1 KR100750440B1 (ko) | 2007-08-22 |
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US (1) | US8284947B2 (ko) |
EP (1) | EP1667416A2 (ko) |
JP (1) | JP2006157920A (ko) |
KR (1) | KR100750440B1 (ko) |
CN (1) | CN1783214A (ko) |
CA (1) | CA2527461C (ko) |
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Cited By (3)
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KR100863184B1 (ko) * | 2006-12-27 | 2008-10-13 | 충북대학교 산학협력단 | 간섭 및 반향신호 제거를 위한 다단계 암묵 디콘볼루션방법 |
WO2016056683A1 (ko) * | 2014-10-07 | 2016-04-14 | 삼성전자 주식회사 | 전자 장치 및 이의 잔향 제거 방법 |
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CA2527461A1 (en) | 2006-06-01 |
KR100750440B1 (ko) | 2007-08-22 |
JP2006157920A (ja) | 2006-06-15 |
CN1783214A (zh) | 2006-06-07 |
CA2527461C (en) | 2013-06-25 |
US8284947B2 (en) | 2012-10-09 |
EP1667416A2 (en) | 2006-06-07 |
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