KR910013186A - Efm 변조회로 - Google Patents
Efm 변조회로 Download PDFInfo
- Publication number
- KR910013186A KR910013186A KR1019890020092A KR890020092A KR910013186A KR 910013186 A KR910013186 A KR 910013186A KR 1019890020092 A KR1019890020092 A KR 1019890020092A KR 890020092 A KR890020092 A KR 890020092A KR 910013186 A KR910013186 A KR 910013186A
- Authority
- KR
- South Korea
- Prior art keywords
- bit
- csv
- merge
- signal
- dsv
- Prior art date
Links
Classifications
-
- 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
- G11B20/02—Analogue recording or reproducing
- G11B20/08—Pulse-modulation recording or reproducing
-
- 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
-
- 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
-
- 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
- G11B2020/1469—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code conversion to or from block codes or representations thereof modulation code with one or more merging bits between consecutive codewords
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
Abstract
내용 없음.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 CD시스템의 엔코딩 시스템 구성도,
제4도는 본 발명에 따른 EFM변조부의 구성도,
제11도는 본 발명의 흐름도.
Claims (2)
- EFM변조회로에 있어서, 입력되는 8비트 데이타에 대응하는 어드레스 위치에 해당 데이타에 대한 14비트의 채널 비트데이타를 저장하고 있는 코드 메모리와, 입력하는 8비트 데이타를 상위 어드레스로 하고 해당 데이타당 발생되는 4개의 머지 선택신호를 하위 어드레스로 하여 순차적으로 머지비트, 리드제로수, 엔드제로수, CSV, 반전비트정보를 저장하고 있는 CSV메모리와, 상기 CSV메모리의 리드 및 엔드제로수, CSV, 반전비트 정보에 의해 해당 디지탈 정보의 런랭스 및 DSV를 계산하여 전 심볼과 결합시 런랭스3T이상 11T이하가 되고 DSV값이 가장 작은 머지비트를 선택하는 신호를 발생하는 수단과, 1심볼 주기로 상기 머지빈트를 상위 비트로, 채널비트 데이타를 하위비트로 병렬 로드하여 직렬 형태의 NRZI신호로 변환하는 수단으로 구성됨을 특징으로 하는 EFM변조회로.
- 제1항에 있어서, 머지비트 발생수단이 전심볼의 엔드 제로수 EZ와 현심볼의 리드제로수 LZ를 가산하여 런랭스가 3T이상 11T이하일시에만 굳 GD신호를 발생하는 수단과, 상기 CSV메모리의 CSV와 전 심볼까지 계산된 TDSV에 의하여 DSV를 계산하는 수단과, 상기 DSV와 해당 심볼의 이전 머지비트에 의한 DSV값을 비교하여 현입력 DSV값이 작을시에만 패스신호를 발생하며 DSV저장 신호 SEL발생시 현 입력 DSV값을 저장하는 수단과, 머지비트 선택신호를 순차적으로 발생하여 상기 CSV메모리의 하위어드레스로 인가하며 상기 굳 및 패스신호 발생시에만 상기 BSV저장신호를 발생하는 동시에 머지비트 선택신호를 저장하고, 머지비트 선택신호 발생 완료시 상기 최종 머지 선택신호를 발생하는 수단으로 구성됨을 특징으로 하는 EFM 변조회로.※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019890020092A KR910013186A (ko) | 1989-12-29 | 1989-12-29 | Efm 변조회로 |
US07/635,440 US5375249A (en) | 1989-12-29 | 1990-12-28 | Eight-to-fourteen-modulation circuit for a digital audio disc system |
JP2409625A JPH04339365A (ja) | 1989-12-29 | 1990-12-28 | Dad装置のefm変調回路 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019890020092A KR910013186A (ko) | 1989-12-29 | 1989-12-29 | Efm 변조회로 |
Publications (1)
Publication Number | Publication Date |
---|---|
KR910013186A true KR910013186A (ko) | 1991-08-08 |
Family
ID=19294129
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019890020092A KR910013186A (ko) | 1989-12-29 | 1989-12-29 | Efm 변조회로 |
Country Status (3)
Country | Link |
---|---|
US (1) | US5375249A (ko) |
JP (1) | JPH04339365A (ko) |
KR (1) | KR910013186A (ko) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE40312E1 (en) | 1995-12-05 | 2008-05-13 | Pioneer Electronic Corporation | Digital data transmitting method |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5331620A (en) * | 1990-02-09 | 1994-07-19 | Matsushita Electric Industrial Co., Ltd. | Recording method and recording apparatus for optical disk |
CN1145146A (zh) * | 1994-12-12 | 1997-03-12 | 索尼公司 | 数据编码方法及数据译码方法 |
US6023234A (en) * | 1995-02-23 | 2000-02-08 | Matsushita Electric Industrial Co., Ltd. | EFM encoder and DSV calculator |
WO1996032780A1 (fr) * | 1995-04-12 | 1996-10-17 | Kabushiki Kaisha Toshiba | Dispositif et procede de conversion-decodage de codes et support d'enregistrement |
KR0165441B1 (ko) * | 1995-09-18 | 1999-03-20 | 김광호 | 디지털 데이터 채널 부호화 및 복호화방법과 그 장치 |
US5699434A (en) | 1995-12-12 | 1997-12-16 | Hewlett-Packard Company | Method of inhibiting copying of digital data |
US6275458B1 (en) * | 1999-02-18 | 2001-08-14 | Terrence L. Wong | Method and apparatus for reading and writing a multi-level signal from an optical disc |
TW538372B (en) * | 1999-10-02 | 2003-06-21 | Mediatek Inc | Zero digital sum value control device and method |
US6604219B1 (en) * | 2000-02-02 | 2003-08-05 | Calimetrics, Inc. | DC control of a multilevel signal |
US7127744B2 (en) * | 2000-03-10 | 2006-10-24 | Digimarc Corporation | Method and apparatus to protect media existing in an insecure format |
US6661356B1 (en) * | 2001-03-05 | 2003-12-09 | Marvell International, Ltd. | Method and apparatus for DC-level constrained coding |
US7286065B1 (en) | 2001-03-05 | 2007-10-23 | Marvell International Ltd. | Method and apparatus for DC-level constrained coding |
KR100669623B1 (ko) * | 2001-03-12 | 2007-01-15 | 엘지전자 주식회사 | 디지털 데이터 변환방법 |
DE10214113B4 (de) * | 2002-03-28 | 2006-05-18 | Siemens Ag | Verfahren zum berührungslosen Austausch einer Sequenz von Datenbytes in einem Identifikationssystem |
TWI231933B (en) * | 2003-09-29 | 2005-05-01 | Mediatek Inc | Method of detecting data structure of non-return-to-zero data in an optical storage device |
CN100353441C (zh) * | 2003-10-10 | 2007-12-05 | 联发科技股份有限公司 | 检测光存储装置中数据的数据结构的方法 |
TWI244272B (en) * | 2003-12-04 | 2005-11-21 | Via Tech Inc | Digital signal modulation method |
US8139628B1 (en) | 2005-01-10 | 2012-03-20 | Marvell International Ltd. | Method and device to compensate for baseline wander |
US7378994B1 (en) * | 2007-01-08 | 2008-05-27 | Mediatek, Inc. | EFM/EFM+ encoder and method thereof |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57176866A (en) * | 1981-04-24 | 1982-10-30 | Sony Corp | Encoder of binary signal |
US4501000A (en) * | 1981-07-27 | 1985-02-19 | Sony Corporation | Method of coding binary data |
NL8303859A (nl) * | 1983-11-10 | 1985-06-03 | Philips Nv | Selektief scramblen bij compact disc. |
JPS61192075A (ja) * | 1985-02-20 | 1986-08-26 | Canon Inc | 情報記録担体およびその再生方法 |
JP2666367B2 (ja) * | 1988-05-24 | 1997-10-22 | ソニー株式会社 | Mスクランブル回路 |
JP2974678B2 (ja) * | 1988-06-23 | 1999-11-10 | ソニー株式会社 | データ誤り検出方式 |
-
1989
- 1989-12-29 KR KR1019890020092A patent/KR910013186A/ko not_active IP Right Cessation
-
1990
- 1990-12-28 US US07/635,440 patent/US5375249A/en not_active Expired - Lifetime
- 1990-12-28 JP JP2409625A patent/JPH04339365A/ja active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE40312E1 (en) | 1995-12-05 | 2008-05-13 | Pioneer Electronic Corporation | Digital data transmitting method |
Also Published As
Publication number | Publication date |
---|---|
JPH04339365A (ja) | 1992-11-26 |
US5375249A (en) | 1994-12-20 |
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A201 | Request for examination | ||
E902 | Notification of reason for refusal | ||
SUBM | Surrender of laid-open application requested |