WO1998021717A1 - Procede et dispositif pour enregistrer des donnees dans une carte optique - Google Patents
Procede et dispositif pour enregistrer des donnees dans une carte optique Download PDFInfo
- Publication number
- WO1998021717A1 WO1998021717A1 PCT/JP1997/004081 JP9704081W WO9821717A1 WO 1998021717 A1 WO1998021717 A1 WO 1998021717A1 JP 9704081 W JP9704081 W JP 9704081W WO 9821717 A1 WO9821717 A1 WO 9821717A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- recording
- data
- sector
- optical memory
- memory card
- 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
- G11B20/10—Digital 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
- G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
- G11B20/1215—Formatting, e.g. arrangement of data block or words on the record carriers on cards
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/02—Control of operating function, e.g. switching from recording to reproducing
- G11B19/04—Arrangements for preventing, inhibiting, or warning against double recording on the same blank or against other recording or reproducing malfunctions
-
- 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
- G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
- G11B7/0033—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with cards or other card-like flat carriers, e.g. flat sheets of optical film
-
- 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
- G11B7/013—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 for discrete information, i.e. where each information unit is stored in a distinct discrete location, e.g. digital information formats within a data block or sector
Definitions
- the present invention relates to an optical memory card data recording method and apparatus, and more particularly to an optical memory card by recording data so as to form at least one recording pit within two data recording intervals in a recording area of the optical memory card.
- the present invention relates to a data recording method and apparatus for an optical memory card capable of improving a function of determining an unrecorded area and a recorded area and reliably preventing double writing. Background art
- an optical memory card is a card composed of a plastic card of a predetermined size, and having a structure in which recording and reproduction can be performed in a recording area by a laser beam.
- FIG. 7 shows a recording area 102 of the optical memory card 101.
- the recording area 102 is a data recording part.
- the recording tracks 104 are alternately arranged with guide tracks 104 formed at regular intervals necessary for tracking control for stabilizing the irradiation position of the recording / reproducing laser beam.
- the reflectivity of the data recording track 103 is different from that of the guide track 104.
- the reflectivity of the data recording track 103 is higher and the guide track 1 is higher.
- the portion of 04 has low reflectance.
- the recording pit 105 is a low reflectance portion formed in the data recording track 103 by a laser beam at the time of information recording, and is recorded with or without the recording pit 105. I have.
- FIG. 8 shows the logical data configuration of the recording area 102.
- an optical memory card reader / writer (not shown) for recording and reproducing data has a lead-in 111 for obtaining bit synchronization and a SYNC mark 112 for obtaining frame synchronization. Is recorded.
- a SYNC mark 112 is recorded, and recording pits 105 are formed at regular intervals.
- the optical memory card reader / writer includes a synchronization signal generation device (not shown), and scans the synchronization signal output from the synchronization signal generation device and the lead-in 111 for each bit detected.
- the optical memory card 101 is scanned at a scanning speed that matches the signal rising at the same time, and the bit synchronization is acquired by maintaining the scanning speed.
- the SYNC mark 112 is formed by arranging recording pits 105 in a pattern not generated by modulation, and is used by an optical memory card reader / writer (not shown) to obtain frame synchronization.
- a frame is a bit segment when a signal processing circuit in an optical memory card reader / writer (not shown) processes a signal.
- the optical memory card reader / writer includes a counter (not shown) for acquiring frame synchronization. The counter counts the synchronization signal, and when the number of bits constituting one frame is counted, a frame synchronization signal is output and the value of the counter is cleared.
- the optical memory card reader / writer (not shown) scans the optical memory card 101 and acquires the frame synchronization when the SYNC mark 112 is detected. By clearing the value of a counter (not shown) to ensure frame synchronization, it is possible to secure frame synchronization.
- a SYNC mark and n sectors 113 are arranged for each frame as shown in the data recording area 110_1, and the sector 113 is composed of one bit or plural bits.
- FIG. 7 is a diagram illustrating an NR ZI—RZ (Non-Return-to-Zerochangeon 1—Return-to-Zero) modulation scheme to be converted into the presence or absence.
- NR ZI—RZ Non-Return-to-Zerochangeon 1—Return-to-Zero
- the NRZI-RZ modulation method is a modulation method in which a pulse is generated at the polarity inversion position of the NRZI (No RetruntoZeRocchange1) modulation method.
- a pulse is generated at the polarity inversion position in FIG. 9 (b) as shown in FIG. 9 (c).
- the data modulated by the NRZ I-RZ modulation method is recorded by forming recording pits in the recording section of the optical memory card so as to correspond to the pulse positions as shown in FIG. 9 (d).
- the optical memory card reader / writer plays back the optical memory card before recording data to the optical memory card, detects the presence or absence of a recording pit, determines the unrecorded area and the recorded area of the optical memory card, and Since double writing to the card is prevented, if there is a continuous portion of data "0" in the data to be recorded on the optical memory card, no recording pit is formed on the optical memory card while the data "0" continues. Therefore, it is difficult to determine whether the area is an unrecorded area or a recorded area, and the double-write protection function of the optical memory card reader / writer is reduced. Disclosure of the invention
- the present invention records data using a modulation method that forms a recording pit even when data "0" follows the data to be recorded, and changes the modulation method of a card recorded using the NRZ I-RZ modulation method. By doing so, the unrecorded area of the optical memory card It is an object of the present invention to provide an optical memory card recording method and apparatus capable of facilitating determination of an area and a recorded area and maintaining a double write prevention function of an optical memory card reader / writer.
- Data is recorded such that at least one recording pit is formed within two data recording intervals in the recording area of the optical memory card.
- the recording area of the optical memory card is the recording area of the optical memory card.
- It consists of a sector consisting of one bit in one frame, modulates the data by the NRZI-RZ modulation method, records it in the sector where data is recorded, and reproduces the sector adjacent to the sector where the data is recorded
- the sector for recording the data and the adjacent sector do not form the recording pit, the sector for recording the data and the adjacent sector
- the recording pits can be formed on the boundaries of the sectors.
- the sector is composed of a plurality of bits in one frame.
- the data is modulated by the MFM-RZ modulation method, the data is recorded in the sector for recording data, and the sector adjacent to the sector for recording the data is reproduced. If the adjacent sector has been recorded and the recording pit is not formed at both the sector for recording the data and the recording position adjacent to the boundary between the adjacent sectors, the data is The recording pit can be formed on the boundary between the sector to be recorded and the adjacent sector.
- the data is reproduced, and when recording positions where the recording pits are not recorded are continuous, recording pits are formed at boundaries of the recording positions. Then, the recording can be changed to the recording by the MFM-RZ modulation method. Further, according to the present invention, in a data recording device of an optical memory device,
- the optical memory card further comprises means for recording data so as to form at least one recording pit within two data recording intervals in the recording area of the optical memory card.
- the recording area of the optical memory card is
- FIG. 1 is a diagram showing an embodiment in which data is recorded in a sector composed of one bit in one frame.
- FIG. 2 is a diagram showing a data configuration on a memory in a card reader / writer of data recorded in the embodiment shown in FIG.
- FIG. 3 is a diagram showing an example of data modulation by the MFM-RZ modulation method.
- FIG. 4 is a diagram showing an embodiment when data is recorded in a sector composed of a plurality of bits in one frame.
- FIG. 5 is a diagram showing a data configuration on memory in a card reader / writer of data recorded in the embodiment shown in FIG.
- FIG. 6 is a diagram showing an example in which a card recorded by the NRZ I-RZ modulation method is changed to a recording by the MFM-RZ modulation method.
- FIG. 7 is a diagram showing a recording area of an optical memory card.
- FIG. 8 is a diagram showing a logical data configuration of a recording area.
- FIG. 9 is a diagram showing an example of data modulation by the NRZ I-RZ modulation method.
- FIG. 1 shows an embodiment in which data is recorded in a sector composed of one bit in one frame.
- FIG. 2 does not show data recorded in the embodiment shown in FIG. This shows the data configuration on the memory in the card reader / writer.
- MFM—RZ Modif i edFr eq uenc y
- Modulatio n — Retruntozero Describes the modulation method.
- the MFM-RZ modulation method is a modulation method in which a pulse is generated at a polarity inversion position of a MFM (Modified Frequency Modulation) modulation method.
- MFM Modified Frequency Modulation
- the conventional NRZ I—RZ (Non-Return-to-Zerochange on 1—Return-to-Zero) modulation scheme uses a NR ZI (Non-Returnto Zero changeon 1) A modulation method that generates a pulse at the polarity inversion position of the modulation method (see Fig. 3 (d)) (see Fig. 3 (e)).
- FIG. 4 shows an embodiment in which data is recorded in a sector composed of a plurality of bits in one frame.
- FIG. 5 does not show data recorded in the embodiment shown in FIG. 3 shows a data configuration on a memory in a card reader / writer.
- data is recorded in a sector composed of 4 bits in one frame shown in FIG. I have.
- FIG. 6 shows an example in which a card recorded by the NRZ I-RZ modulation method is changed to recording by the MFM-RZ modulation method.
- the card recorded by the original NRZ I-RZ modulation method consists of one bit in one frame as described above.
- the MFM-RZ modulation method (similar to the MFM_RZ modulation method) can be used in the same way, even if the data is discontinuous, such as the sector that is performed, or if the data is continuous, such as a sector that consists of multiple bits in one frame. Can be changed.
- the data "00000110100" shown in Fig. 6 (a) becomes a signal that generates a pulse at the bit middle point of the data "1" in the NRZ I-RZ modulation method, as shown in Fig. 6 (b). Forms a recording pit corresponding to the position where the pulse is generated.
- the data shown in Fig. 6 (a) is the bit separation position when the bit middle point of data "1" and the data "0" follow, as shown in Fig. 6 (c). Is a signal that generates a pulse.
- a card reader / writer reproduces the card recorded by the NRZ I-RZ modulation method, forms recording pits on the card by the MFM-RZ modulation method based on the reproduced data, and records the data. Then, the NRZ I-RZ modulation method can be changed to the MFM-RZ modulation method. Further, a card reader / writer (not shown) detects the presence or absence of recording pits from the reproduced signal, determines the unrecorded area and the recorded area of the optical memory card, extracts a synchronous component from the reproduced signal, and converts it into a data signal.
- This invention is applicable to the data recording method and apparatus of an optical memory card. According to the present invention, since data is recorded so as to form at least one recording pit within two data recording intervals of the recording area of the optical memory card, the unrecorded area and the recorded area of the optical memory card are recorded. The function of judging the area is improved, and double writing can be easily prevented.
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Optical Recording Or Reproduction (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97911498A EP0877358A4 (en) | 1996-11-11 | 1997-11-10 | METHOD AND DEVICE FOR DATA RECORDING ON AN OPTICAL MEMORY CARD |
US09/101,746 US6208600B1 (en) | 1996-11-11 | 1997-11-10 | Method and device for recording data in an optical memory card |
CA002242195A CA2242195C (en) | 1996-11-11 | 1997-11-10 | Method and device for recording data in an optical memory card |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8/298782 | 1996-11-11 | ||
JP8298782A JPH10143866A (ja) | 1996-11-11 | 1996-11-11 | 光メモリカードのデータ記録方法および装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998021717A1 true WO1998021717A1 (fr) | 1998-05-22 |
Family
ID=17864157
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1997/004081 WO1998021717A1 (fr) | 1996-11-11 | 1997-11-10 | Procede et dispositif pour enregistrer des donnees dans une carte optique |
Country Status (6)
Country | Link |
---|---|
US (1) | US6208600B1 (ja) |
EP (1) | EP0877358A4 (ja) |
JP (1) | JPH10143866A (ja) |
KR (1) | KR100272620B1 (ja) |
CA (1) | CA2242195C (ja) |
WO (1) | WO1998021717A1 (ja) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060059365A1 (en) * | 1999-12-06 | 2006-03-16 | Bsi2000, Inc. | Facility security with optical cards |
CN100353423C (zh) * | 2002-05-01 | 2007-12-05 | Lg电子株式会社 | 高密度只读光盘及使用光盘的光盘设备和方法 |
AU2003237063B2 (en) | 2002-07-02 | 2009-07-23 | Lg Electronics Inc. | High-density optical disc and method for restricting playback of the high-density optical disc in optical disc apparatus |
US20050197945A1 (en) * | 2004-02-12 | 2005-09-08 | Bsi2000, Inc. | Optical banking card |
US20050237338A1 (en) * | 2004-04-26 | 2005-10-27 | Bsi2000, Inc. | Embedded holograms on optical cards |
US20050247776A1 (en) * | 2004-05-04 | 2005-11-10 | Bsi2000, Inc. | Authenticating optical-card reader |
US20060039249A1 (en) * | 2004-08-18 | 2006-02-23 | Bsi2000,Inc. | Systems and methods for reading optical-card data |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5841444A (ja) * | 1981-09-04 | 1983-03-10 | Hitachi Ltd | 光デイスクの情報書き込み方式 |
JPS58165163A (ja) * | 1982-03-26 | 1983-09-30 | Hitachi Ltd | 再書込み不能な記録媒体およびその記録方法 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4970712A (en) * | 1985-04-23 | 1990-11-13 | Dai Nippon Insatsu Kabushiki Kaisha | Method for recording data onto optical data recording cards using pits for indicating the center line positions of data arrays provided on said cards |
JPS6267731A (ja) * | 1985-09-20 | 1987-03-27 | Fujitsu Ltd | 光記録再生方法及び光記録再生装置 |
JPH0828046B2 (ja) * | 1987-01-30 | 1996-03-21 | オリンパス光学工業株式会社 | カ−ド状記録媒体へのデ−タ記録方法 |
US5276667A (en) * | 1989-02-22 | 1994-01-04 | Omron Corporation | Optical recording and reproducing apparatus for synchronizing recording on subsequent unrecorded sectors |
JPH04252425A (ja) * | 1991-01-28 | 1992-09-08 | Olympus Optical Co Ltd | 情報記録装置 |
US5204514A (en) * | 1991-02-22 | 1993-04-20 | Olympus Optical Co., Ltd. | Information recording/reproducing method capable of fast-accessing |
US5291463A (en) * | 1991-11-05 | 1994-03-01 | Olympus Optical Co., Ltd. | Optical card reproducing apparatus for reproducing information with a two-dimensional solid-state imaging device |
JPH0628770A (ja) * | 1992-07-10 | 1994-02-04 | Olympus Optical Co Ltd | 光カード記録再生装置 |
US6487151B1 (en) * | 1994-12-20 | 2002-11-26 | Matsushita Electric Industrial Co. Ltd. | Optical information recording and reproducing system with overwrite capability and recording medium for use therewith |
CN1288639C (zh) * | 1996-04-11 | 2006-12-06 | 松下电器产业株式会社 | 光盘 |
JP2924831B2 (ja) * | 1996-11-15 | 1999-07-26 | 日本電気株式会社 | データ記録再生装置 |
-
1996
- 1996-11-11 JP JP8298782A patent/JPH10143866A/ja active Pending
-
1997
- 1997-11-10 EP EP97911498A patent/EP0877358A4/en not_active Withdrawn
- 1997-11-10 US US09/101,746 patent/US6208600B1/en not_active Expired - Fee Related
- 1997-11-10 KR KR1019980705023A patent/KR100272620B1/ko not_active IP Right Cessation
- 1997-11-10 WO PCT/JP1997/004081 patent/WO1998021717A1/ja not_active Application Discontinuation
- 1997-11-10 CA CA002242195A patent/CA2242195C/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5841444A (ja) * | 1981-09-04 | 1983-03-10 | Hitachi Ltd | 光デイスクの情報書き込み方式 |
JPS58165163A (ja) * | 1982-03-26 | 1983-09-30 | Hitachi Ltd | 再書込み不能な記録媒体およびその記録方法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP0877358A4 * |
Also Published As
Publication number | Publication date |
---|---|
CA2242195C (en) | 2000-11-07 |
CA2242195A1 (en) | 1998-05-22 |
EP0877358A4 (en) | 2006-06-14 |
KR100272620B1 (ko) | 2000-12-01 |
US6208600B1 (en) | 2001-03-27 |
KR19990076896A (ko) | 1999-10-25 |
EP0877358A1 (en) | 1998-11-11 |
JPH10143866A (ja) | 1998-05-29 |
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