WO2004081919A2 - Dual-speed optical record carrier recording apparatus - Google Patents
Dual-speed optical record carrier recording apparatus Download PDFInfo
- Publication number
- WO2004081919A2 WO2004081919A2 PCT/IB2004/050168 IB2004050168W WO2004081919A2 WO 2004081919 A2 WO2004081919 A2 WO 2004081919A2 IB 2004050168 W IB2004050168 W IB 2004050168W WO 2004081919 A2 WO2004081919 A2 WO 2004081919A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- record carrier
- data
- writing
- recording apparatus
- crystalline
- Prior art date
Links
Classifications
-
- 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
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/0045—Recording
-
- 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
- G11B19/20—Driving; Starting; Stopping; Control thereof
- G11B19/26—Speed-changing arrangements; Reversing arrangements; Drive-transfer means therefor
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
-
- 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
Definitions
- the present invention relates to an optical record carrier recording apparatus and method for recording data on a phase-change optical record carrier, in particular to a small form factor optical drive, and further to a portable device, such as a mobile phone or a palmtop computer. Still further, the present invention relates to an optical record carrier provided for dual-speed recording.
- SFFO small form factor optical
- a rewritable phase-change optical record carrier disc
- Low writing speed can be used when the drive is in a low power mode, e.g. when no mains are available, and a more power consuming high-speed recording mode can be used when the drive is in a high power mode, e.g. connected to an external power supply.
- a high power mode e.g. connected to an external power supply.
- Phase-change discs can be made with excellent recording properties, but are generally only optimal for their designed recording velocity. Introducing a high-speed recording mode will generally need faster crystallizing materials which will not work properly at lower recording speeds. In other words, the velocity range of a phase-change disc is not sufficient for both a low and a high-speed recording mode.
- optical record carrier recording apparatus as claimed in claim 1 comprising:
- a reading means for reading said state information from said optical record carrier
- a switching means for switching said writing means between at least two writing modes having different writing speeds depending on the power mode of the recording apparatus, wherein said writing means is switched into a first writing mode having a higher writing speed than a second writing mode when the recording apparatus is in a high power mode and if a crystalline area is available on said record carrier, and an address control means for controlling the address at which the data are recorded on said record carrier, wherein in said first writing mode the addresses are controlled based on said state information such that the data are only recorded in crystalline areas.
- a corresponding method is defined in claim 13.
- a corresponding phase- change optical record carrier is defined in claim 15. Preferred embodiments thereof are defined in the dependent claims.
- the present invention is based on the idea that on empty (fully crystalline) phase-change discs data can be recorded with a velocity much higher than the crystallization speed of the phase-change material. This can be done because the phase-change material only needs to be made amorphous by melt-quenching and no crystallization is needed, as in direct overwrite.
- An appropriate writing strategy for writing on a phase-change layer is, for instance, described in EP 1143427 A2.
- An empty record carrier is fully crystalline, and its full user area is available for high-speed recording.
- data gets written on the record carrier it is proposed according to the present invention to keep track of the location of the written areas, i.e. non- crystalline areas, and unwritten areas, i.e. crystalline areas, on the record carrier.
- This information is stored as state information on the record carrier and is updated each time data are recorded on the record carrier.
- This state information is mainly important in a high power mode when high-speed writing of data is generally possible. Provided that storage space for high-speed writing, i.e.
- the switching means will then, in high power mode, switch the writing means into the high-speed writing mode.
- the address control means ensure that in the high-speed mode data are only recorded in crystalline areas. If this area is full and more data still needs to be recorded, the remaining data will be recorded in non-crystalline areas, so that the switching means, at the same time, switch the writing means back into the low- speed writing mode.
- the low-speed writing mode is preferably also used if the recording apparatus is in a low power mode, e.g. supplied with power from a battery or an accumulator. However, also in low power mode the high-speed writing mode can be used if an application demands it and as long as the required power can be provided, e.g. by the battery or the accumulator.
- the highest address at which data are written on the record carrier are stored as state information, and it is assumed that below this highest address all areas are non-crystalline areas and that all areas above said highest address are fully crystalline areas available for high-speed writing.
- data are exclusively written above said highest address while in the low-speed writing mode data are preferably recorded below said highest address, i.e. if possible, data stored in non-crystalline areas below said highest address are overwritten if there are any overwriteble data available. Otherwise, also in low-speed writing mode data are written above said highest address.
- the defragmentation procedure of the file system is slightly changed according to another embodiment. Data are reallocated in such a way that their addresses are minimal and system performance is optimal.
- the area between the maximum address of the data recorded on the record carrier before reallocation and the maximum address of the data recorded on the record carrier after reallocation can be DC-erased, i.e. made crystalline, preferably after the defragmentation step mentioned above. Thereafter, the state information is updated accordingly. This procedure can be done, for example, when the batteries of the recording apparatus have to be charged, since then sufficient electrical power and idle time is available anyway.
- writing of data on the record carrier is started from the outside of the record carrier, i.e. the optical disc comprises a reversed spiral which runs from the outside of the disc to the inside contrary to the usual layout.
- writing is always started with the lowest rotation speed of the disc possible and a given data rate which is advantageous in the low power mode of the recording apparatus.
- OPC Optical Power Control
- the start values for the OPC procedure are preferably written in the disc information block (DIB) which is written in the inner zone of the lead-in area. In this DIB there is space available to put also OPC parameters for other OPC procedures.
- DIB disc information block
- the switching means is adapted for detecting the power mode of the recording apparatus from the power supplied or for receiving and evaluating an information, in particular from a portable device into which the recording apparatus is incorporated, identifying the power mode of the recording apparatus.
- the switching means are adapted for switching the writing means into the first (high-speed) writing mode when power is supplied from a mains power supply, and for switching the writing means into the second writing mode when power is supplied from a battery or an accumulator.
- CAV Constant Angular Velocity
- CLV Constant Linear Velocity
- CAV mode the linear velocity along the track will increase with the factor 2.33 from the inner radius to the outer radius of a 1GB SFFO disc having an inner radius of 6.0mm and an outer radius of 14mm.
- the record carriers can probably marginally handle this, but need to be sensitive enough to be able to write properly at these higher speeds as well.
- An optical record carrier recording apparatus which makes sure, in case of using the CAV mode, that data are only written in fully initialised (crystalline) areas when the linear velocity is too large is defined in claim 9, said apparatus comprising:
- the recording apparatus is preferably applied in a portable device such as a telephone, in particular a mobile phone or a cordless phone, or a palmtop computer (PDA).
- the recording apparatus is preferably a small form factor optical drive.
- Further portable devices comprising an optical record carrier recording apparatus may be digital camcorders, digital cameras, laptops, sub laptops and handheld devices.
- Fig. 2 shows a first embodiment of a recording apparatus according to the present invention
- Fig. 3 shows a flow chart illustrating the recording method according to the present invention
- Figs. 4a, 4b show layouts of the data areas on a record carrier according to the present invention
- Fig. 5 shows an address table used in the data area layout of Fig. 4b and Fig. 6 shows another embodiment of a recording apparatus according to the present invention.
- Fig. 1 shows a mobile phone 1 as one example of the portable device in which the invention can be implemented.
- the mobile phone 1 comprises a data bus 2 to which a data interface 3 for transmitting and receiving data via a cordless or corded connection, a data processing means 4, such as a digital signal processor (DSP), a small form factor optical drive 5 and a data transmitting and receiving unit 6 for high frequency mobile data transmission and reception are connected.
- the mobile phone 1 further comprises a power interface 7 to which an external power source, e.g. an AC/DC power adaptor connected to a mains supply can be connected.
- a battery (or accumulator) 8 is provided as internal power supply when the mobile phone 1 is used in a mobile environment where no external power is supplied at the power interface 7.
- a power switch 9 is provided to switch between the two power supplies 7 and 8 and to provide the elements of the mobile phone 1 with power as indicated by the broken lines.
- the power switch 9 is adapted to provide power supplied at power interface 7 in case an external power source is connected there. Otherwise battery power of the battery 8 is used.
- a control unit 10 is provided for control of the elements of the mobile phone 1 .
- the drive 5 comprises a data interface 51 connected to the bus 2 of the mobile phone 1 for data input and output. Further, the drive 5 comprises a power interface 52 connected to the power switch 9 of the mobile phone 1 for power supply of the drive 5.
- a mode switch 53 is provided to switch, depending on the power supplied at power interface 52, the read/write unit 54 between different writing modes during writing data to a record carrier 55, which is a small form factor optical disc in this embodiment. Further, an address control means 56 is provided for controlling the addresses at which data are written on the disc 55.
- the read/write unit 54 reads the state information including the information about the location of crystalline and non-crystalline areas from the record carrier 55 (S2).
- the writing mode in particular the speed of writing, and the location where the data will be written will be determined.
- the mode switch 53 in which power mode the recording apparatus 5 is. This can be done by checking the power level provided at power interface 52 or by checking an information received at the power interface 52 identifying the power mode. Alternatively, a command can also be transmitted from an external device to the mode switch instructing the mode switch 53 to switch into a certain power mode. If the recording apparatus 5 is in a low power mode, e.g. provided with power from a battery supply, the mode switch 53 switches the read/write unit 54 into a low-speed mode (S4) which means that data will be written on the record carrier 55 with a low writing speed. According the preferred embodiment the crystallization speed of the phase-change disc 55 is tuned for this low-speed writing operation.
- the recording apparatus 5 If the recording apparatus 5 is in a high power mode, it will then be checked if a crystalline area is available on the record carrier 55 for writing the data, i.e. if there is sufficient unwritten space available on the record carrier 55 for writing at least part of the data (S5). If this is not the case, then again the low-speed mode will be used (S4) while otherwise the read/write unit 54 will be switched into the high-speed mode (S6) for writing the data on the disc 55 with a higher writing speed.
- Fig. 4 shows two different ways of storing the state information on the record carrier. Shown are the different data areas of an optical disc, comprising a lead-in area LI, a user area UA and a lead-out area LO.
- User data are usually written in the user area UA in sequential order starting with the lowest addresses, i.e. starting from the left edge of the user area UA shown in Fig. 4.
- An empty disc is fully crystalline, and its full user area UA is available for high-speed recording.
- the file system keeps track of a number X which is the highest address where data is once written on the disc. All addresses above X are unwritten and in the crystalline phase. The user area above X is thus available for high-speed recording of data. This number X is thus written on the disc as state information, preferably as part of the file allocation table (FAT).
- FAT file allocation table
- the standard writing procedure is applied, i.e. writing is done with normal writing speed.
- the address X is updated.
- the address X is of importance.
- the allocation rules of the file system change. Data will now be written above the address X in high-speed mode as long as space remains available in that high-speed area. When that area is full and more data needs to be written, the file system will switch to the free space still available below address X. However, these areas are not necessary in crystalline phase and therefore need to be written in low speed.
- a more general address table is defined, for instance in the disc information block, i.e. written in the rewritable part of the lead-in area LI or as part of the file allocation table in the user area UA.
- this table a list is maintained in which the state of every logical block is administered, i.e. for each logical block it is indicated if it is crystalline (unwritten) or non-crystalline (written).
- Such a table is shown in Fig. 5.
- bit 0 indicating a crystalline block
- bit 1 indicating a non-crystalline block.
- FIG. 6 Another embodiment of a recording apparatus 5 is shown in Fig. 6.
- the power switch 57 is provided inside the recording apparatus 5, and also a battery 58 (or an accumulator).
- the power switch 57 has thus the same function as the power switch 9 as shown in Fig. 1. Further changes are possible, like to the number of power modes and writing modes. Further, the invention can also be applied in other embodiments of the recording apparatuses or other external devices different from the ones shown in the figures.
Landscapes
- Optical Recording Or Reproduction (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Optical Head (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006506653A JP2006520510A (en) | 2003-03-11 | 2004-03-01 | Two-speed optical record carrier recording device |
DE602004017142T DE602004017142D1 (en) | 2003-03-11 | 2004-03-01 | RECORDING DEVICE FOR AN OPTICAL RECORDING CARRIER WITH TWO SPEEDS |
US10/548,241 US20060209649A1 (en) | 2003-03-11 | 2004-03-01 | Dual-speed optical record carrier recording apparatus |
EP04715999A EP1604361B1 (en) | 2003-03-11 | 2004-03-01 | Dual-speed optical record carrier recording apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03100614.1 | 2003-03-11 | ||
EP03100614 | 2003-03-11 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2004081919A2 true WO2004081919A2 (en) | 2004-09-23 |
WO2004081919A3 WO2004081919A3 (en) | 2004-11-25 |
Family
ID=32981912
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2004/050168 WO2004081919A2 (en) | 2003-03-11 | 2004-03-01 | Dual-speed optical record carrier recording apparatus |
Country Status (9)
Country | Link |
---|---|
US (1) | US20060209649A1 (en) |
EP (1) | EP1604361B1 (en) |
JP (1) | JP2006520510A (en) |
KR (1) | KR20050113219A (en) |
CN (1) | CN1759444A (en) |
AT (1) | ATE411601T1 (en) |
DE (1) | DE602004017142D1 (en) |
TW (1) | TW200423088A (en) |
WO (1) | WO2004081919A2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100369128C (en) * | 2006-06-16 | 2008-02-13 | 威盛电子股份有限公司 | Tracking controlling method |
US8526278B2 (en) | 2008-05-20 | 2013-09-03 | Sharp Kabushiki Kaisha | Recording method, recording device, optical disc, optical disc manufacturing method, and optical disc drive device |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050195544A1 (en) * | 2004-03-02 | 2005-09-08 | Fung Patrick Y.C. | Current control circuit and method |
JPWO2007091410A1 (en) * | 2006-02-08 | 2009-07-02 | パイオニア株式会社 | Information recording apparatus, multi-layer information recording medium OPC processing method, program |
JP4844482B2 (en) * | 2007-06-25 | 2011-12-28 | Tdk株式会社 | Recorder control method and recorder control device. |
US10068619B1 (en) * | 2014-07-25 | 2018-09-04 | Western Digital Technologies, Inc. | Hand held storage device |
US9836108B2 (en) * | 2014-09-10 | 2017-12-05 | Toshiba Memory Corporation | Memory system and controller |
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EP1143427A2 (en) * | 2000-03-30 | 2001-10-10 | TDK Corporation | Optical recording method, optical recording apparatus, and optical recording medium |
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JPH0887818A (en) * | 1994-09-14 | 1996-04-02 | Matsushita Electric Ind Co Ltd | Cd-rom driving apparatus |
BE1009677A3 (en) * | 1995-09-29 | 1997-06-03 | Philips Electronics Nv | INFORMATION CARRIER AND DEVICE FOR DESCRIBING AN INFORMATION CARRIER. |
KR100235326B1 (en) * | 1996-10-19 | 2000-01-15 | 구자홍 | Multi-rate optical disc recording method and device |
KR100250578B1 (en) * | 1997-03-31 | 2000-04-01 | 전주범 | Recording method for dvdr system |
US6285647B1 (en) * | 1997-04-10 | 2001-09-04 | U.S. Philis Corporation | Method and device for writing an optical record carrier |
KR100288402B1 (en) * | 1997-12-29 | 2001-05-02 | 윤종용 | Method for confronting buffer underrun of optical disc drive |
GB2336463B (en) * | 1998-04-16 | 2000-07-05 | Ricoh Kk | Optical recording method for a rewritable phase-change optical recording medium |
KR100558986B1 (en) * | 1999-09-30 | 2006-03-10 | 엘지전자 주식회사 | Apparatus and method for controlling a reproduction speed of an optical disc based on a remaining battery energy |
JP2001216645A (en) * | 1999-11-22 | 2001-08-10 | Sanyo Electric Co Ltd | Controller |
JP3496628B2 (en) * | 2000-05-31 | 2004-02-16 | ヤマハ株式会社 | Optical disk recording method and optical disk recording device |
JP4806839B2 (en) * | 2000-07-19 | 2011-11-02 | ソニー株式会社 | Recording apparatus and recording method |
US6987717B2 (en) * | 2000-08-10 | 2006-01-17 | Ricoh Company, Ltd. | Optical disk device recording data on a recordable or rewritable optical disk by setting a recording velocity and a recording power for each of zones on an optical disk |
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US7512052B2 (en) * | 2001-03-16 | 2009-03-31 | Ricoh Company, Ltd. | Formatting of phase-change optical disc for improved signal characteristics |
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2004
- 2004-03-01 KR KR1020057016745A patent/KR20050113219A/en not_active Application Discontinuation
- 2004-03-01 AT AT04715999T patent/ATE411601T1/en not_active IP Right Cessation
- 2004-03-01 WO PCT/IB2004/050168 patent/WO2004081919A2/en active Application Filing
- 2004-03-01 DE DE602004017142T patent/DE602004017142D1/en not_active Expired - Fee Related
- 2004-03-01 US US10/548,241 patent/US20060209649A1/en not_active Abandoned
- 2004-03-01 JP JP2006506653A patent/JP2006520510A/en active Pending
- 2004-03-01 EP EP04715999A patent/EP1604361B1/en not_active Expired - Lifetime
- 2004-03-01 CN CNA2004800064667A patent/CN1759444A/en active Pending
- 2004-03-08 TW TW093106054A patent/TW200423088A/en unknown
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EP1143427A2 (en) * | 2000-03-30 | 2001-10-10 | TDK Corporation | Optical recording method, optical recording apparatus, and optical recording medium |
Non-Patent Citations (1)
Title |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100369128C (en) * | 2006-06-16 | 2008-02-13 | 威盛电子股份有限公司 | Tracking controlling method |
US8526278B2 (en) | 2008-05-20 | 2013-09-03 | Sharp Kabushiki Kaisha | Recording method, recording device, optical disc, optical disc manufacturing method, and optical disc drive device |
Also Published As
Publication number | Publication date |
---|---|
JP2006520510A (en) | 2006-09-07 |
EP1604361A2 (en) | 2005-12-14 |
US20060209649A1 (en) | 2006-09-21 |
ATE411601T1 (en) | 2008-10-15 |
EP1604361B1 (en) | 2008-10-15 |
CN1759444A (en) | 2006-04-12 |
KR20050113219A (en) | 2005-12-01 |
DE602004017142D1 (en) | 2008-11-27 |
WO2004081919A3 (en) | 2004-11-25 |
TW200423088A (en) | 2004-11-01 |
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