KR100602720B1 - 배경 잡음 제거 회로 - Google Patents
배경 잡음 제거 회로 Download PDFInfo
- Publication number
- KR100602720B1 KR100602720B1 KR1020030085413A KR20030085413A KR100602720B1 KR 100602720 B1 KR100602720 B1 KR 100602720B1 KR 1020030085413 A KR1020030085413 A KR 1020030085413A KR 20030085413 A KR20030085413 A KR 20030085413A KR 100602720 B1 KR100602720 B1 KR 100602720B1
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- KR
- South Korea
- Prior art keywords
- signal
- background noise
- amplifier
- feedback signal
- generator
- Prior art date
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- 230000005236 sound signal Effects 0.000 claims abstract description 32
- 238000001514 detection method Methods 0.000 claims abstract description 22
- 230000002194 synthesizing effect Effects 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 7
- 230000003321 amplification Effects 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 230000002238 attenuated effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 7
- 230000000593 degrading effect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/24—Signal processing not specific to the method of recording or reproducing; Circuits therefor for reducing noise
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10527—Audio or video recording; Data buffering arrangements
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10527—Audio or video recording; Data buffering arrangements
- G11B2020/10537—Audio or video recording
- G11B2020/10546—Audio or video recording specifically adapted for audio data
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Amplifiers (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
Description
Claims (6)
- 음원에 대한 원음신호를 생성하는 음원 발생부;피드백 신호 생성부로부터의 피드백신호 입력 여부에 따라 상기 음원 발생부에서 생성한 원음신호에 이 피드백신호를 합성시키는 배경 잡음 제거부;상기 배경 잡음 제거부에서 합성시킨 오디오신호를 반전시켜 증폭하는 증폭부; 및상기 증폭부에서 반전/증폭한 오디오신호의 포락선검파신호를 검출하고, 이 검출한 포락선검파신호의 레벨이 기 설정된 기준전압의 레벨보다 낮으면 상기 증폭부에서 출력하는 오디오신호를 조정하여 피드백신호로서 생성하는 상기 피드백 신호 생성부를 포함하는 배경 잡음 제거 회로.
- 제 1 항에 있어서,상기 배경 잡음 제거부는,상기 음원 발생부로부터 입력되는 원음신호와 상기 피드백 신호 생성부로부터 입력되는 피드백신호를 혼합하여 출력하는 혼합기를 포함하는 것을 특징으로 하는 배경 잡음 제거 회로.
- 제 1 항에 있어서,상기 피드백 신호 생성부는,상기 증폭부로부터 입력되는 오디오신호의 포락선검파신호를 검출하는 정류 회로;반전 단자에 입력된 상기 포락선검파신호의 레벨과 비반전 단자에 입력된 상기 기준전압의 레벨을 비교하고서, 이 비교 결과로, 포락선검파신호의 레벨이 기준전압의 레벨보다 낮으면 스위칭온제어신호를 생성하고, 포락선검파신호의 레벨이 기준전압의 레벨보다 높으면 스위칭오프제어신호를 생성하는 비교기;상기 비교기로부터 입력되는 스위칭온제어신호에 따라 상기 증폭부에서 출력하는 오디오신호를 감쇄기로 전달하는 스위치; 및상기 스위치로부터 전달받은 오디오신호를 감쇄시켜 피드백신호로서 생성하여 상기 배경 잡음 제거부로 출력하는 감쇄기를 포함하는 것을 특징으로 하는 배경 잡음 제거 회로.
- 제 1 항 내지 제 3 항 중 어느 한 항에 있어서,상기 기준전압은 상기 증폭기의 이득에 비례하여 조정되는 것을 특징으로 하는 배경 잡음 제거 회로.
- 삭제
- 제 3 항에 있어서,상기 감쇄기는 상기 증폭기의 증폭 이득에 반비례하여 감쇄 정도가 결정되는 것을 특징으로 하는 배경 잡음 제거 회로.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020030085413A KR100602720B1 (ko) | 2003-11-28 | 2003-11-28 | 배경 잡음 제거 회로 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020030085413A KR100602720B1 (ko) | 2003-11-28 | 2003-11-28 | 배경 잡음 제거 회로 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20050051778A KR20050051778A (ko) | 2005-06-02 |
KR100602720B1 true KR100602720B1 (ko) | 2006-07-20 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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KR1020030085413A Expired - Fee Related KR100602720B1 (ko) | 2003-11-28 | 2003-11-28 | 배경 잡음 제거 회로 |
Country Status (1)
Country | Link |
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KR (1) | KR100602720B1 (ko) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI344752B (en) * | 2004-10-18 | 2011-07-01 | Monolithic Power Systems Inc | Method for high efficiency audio amplifier |
CN116264657A (zh) * | 2021-12-15 | 2023-06-16 | 华润微集成电路(无锡)有限公司 | 基于音频功放电路实现本底噪声优化控制的方法 |
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2003
- 2003-11-28 KR KR1020030085413A patent/KR100602720B1/ko not_active Expired - Fee Related
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Publication number | Publication date |
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KR20050051778A (ko) | 2005-06-02 |
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