KR100267982B1 - 기록 파워 변조 회로 - Google Patents
기록 파워 변조 회로 Download PDFInfo
- Publication number
- KR100267982B1 KR100267982B1 KR1019970006908A KR19970006908A KR100267982B1 KR 100267982 B1 KR100267982 B1 KR 100267982B1 KR 1019970006908 A KR1019970006908 A KR 1019970006908A KR 19970006908 A KR19970006908 A KR 19970006908A KR 100267982 B1 KR100267982 B1 KR 100267982B1
- Authority
- KR
- South Korea
- Prior art keywords
- recording
- power
- output
- data
- recording power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
- G11B7/126—Circuits, methods or arrangements for laser control or stabilisation
- G11B7/1263—Power control during transducing, e.g. by monitoring
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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
- G11B20/10037—A/D conversion, D/A conversion, sampling, slicing and digital quantisation or adjusting parameters thereof
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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
- G11B20/14—Digital recording or reproducing using self-clocking codes
- G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
- G11B20/1423—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code
- G11B20/1426—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code conversion to or from block codes or representations thereof
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
- G11B7/00736—Auxiliary data, e.g. lead-in, lead-out, Power Calibration Area [PCA], Burst Cutting Area [BCA], control information
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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
- G11B20/14—Digital recording or reproducing using self-clocking codes
- G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
- G11B20/1423—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code
- G11B20/1426—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code conversion to or from block codes or representations thereof
- G11B2020/1461—8 to 14 modulation, e.g. the EFM code used on CDs or mini-discs
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Optical Head (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
Description
Claims (4)
- 디스크에 기록되어 있는 기준 파워를 검출한 후 기준 파워를 중심으로 여러 단계로 기록 파워를 나누어서 기록 데이타를 출력하는 엔코더와,상기 엔코더에서 출력되는 기록 파워로 상기 기록 데이타를 디스크의 특정 영역에 기록한 후 재생하는 기록 및 재생 서보와,상기 엔코더에서 출력되는 기록 데이타와 상기 기록 및 재생 서보에서 출력되는 재생 데이타를 비교하여 두 신호의 앞, 뒤 위상차를 각각 검출하는 비교부와,상기 비교부의 각 출력을 저역 필터링한 후 차동 증폭하는 증폭부와,상기 증폭부의 출력을 디지탈 값으로 변환하는 아날로그/디지탈 컨버터와,상기 아날로그/디지탈 컨버터의 디지탈 값을 저장한 후 상기 기록 및 재생 서보로 피드백하여 데이타의 기록 및 재생과 비교 과정을 여러 단계의 기록 파워에 대해 순차적으로 모두 수행한 후 저장된 디지탈 값중 가장 적은 값을 최적의 기록 파워로 결정하는 제어부를 포함하여 구성됨을 특징으로 하는 기록 파워 변조 회로.
- 제 1 항에 있어서, 상기 엔코더에서 출력되는 데이타가 기록되는 디스크의 특정 영역은 PCA 영역의 테스트 구간임을 특징으로 하는 기록파워 변조 회로.
- 제 1 항에 있어서, 상기 엔코더에서 출력되는 데이타는 nT EFM 신호임을 특징으로 하는 기록 파워 변조 회로.
- 제 1 항에 있어서, 상기 제어부는기록 데이타와 재생 데이타와의 오차가 가장 적은 값을 최적의 기록 파워로 결정함을 특징으로 하는 기록 파워 변조 회로.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019970006908A KR100267982B1 (ko) | 1997-03-03 | 1997-03-03 | 기록 파워 변조 회로 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019970006908A KR100267982B1 (ko) | 1997-03-03 | 1997-03-03 | 기록 파워 변조 회로 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR19980072247A KR19980072247A (ko) | 1998-11-05 |
| KR100267982B1 true KR100267982B1 (ko) | 2000-10-16 |
Family
ID=19498554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019970006908A Expired - Fee Related KR100267982B1 (ko) | 1997-03-03 | 1997-03-03 | 기록 파워 변조 회로 |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR100267982B1 (ko) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100427102B1 (ko) * | 2000-04-07 | 2004-04-17 | 티아크 가부시키가이샤 | 광디스크 기록장치 |
| US6778478B2 (en) | 2000-04-07 | 2004-08-17 | Teac Corporation | Optical disk recording apparatus and method of recording data on optical disk |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001307326A (ja) * | 2000-04-20 | 2001-11-02 | Teac Corp | 光ディスク記録装置 |
| KR100505642B1 (ko) * | 2002-09-26 | 2005-08-03 | 삼성전자주식회사 | Cd-r 디스크에 데이터를 기입할 때 표준 b-레벨을결정하는 방법 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR930023950A (ko) * | 1992-05-08 | 1993-12-21 | 강진구 | 광기록 재생장치의 레이저 파워결정을 위한 회로 및 방법 |
-
1997
- 1997-03-03 KR KR1019970006908A patent/KR100267982B1/ko not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR930023950A (ko) * | 1992-05-08 | 1993-12-21 | 강진구 | 광기록 재생장치의 레이저 파워결정을 위한 회로 및 방법 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100427102B1 (ko) * | 2000-04-07 | 2004-04-17 | 티아크 가부시키가이샤 | 광디스크 기록장치 |
| US6778478B2 (en) | 2000-04-07 | 2004-08-17 | Teac Corporation | Optical disk recording apparatus and method of recording data on optical disk |
Also Published As
| Publication number | Publication date |
|---|---|
| KR19980072247A (ko) | 1998-11-05 |
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