CA2515489C - Information storage medium and method and apparatus of recording and/or reproducing data on and/or from the same - Google Patents
Information storage medium and method and apparatus of recording and/or reproducing data on and/or from the same Download PDFInfo
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- CA2515489C CA2515489C CA2515489A CA2515489A CA2515489C CA 2515489 C CA2515489 C CA 2515489C CA 2515489 A CA2515489 A CA 2515489A CA 2515489 A CA2515489 A CA 2515489A CA 2515489 C CA2515489 C CA 2515489C
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- 238000003860 storage Methods 0.000 title claims abstract description 85
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims 1
- 230000003287 optical effect Effects 0.000 description 18
- 239000000758 substrate Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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
- G11B7/007—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
-
- 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
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
- G11B7/24085—Pits
-
- 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
- G11B7/00454—Recording involving phase-change effects
-
- 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
- G11B7/005—Reproducing
- G11B7/0053—Reproducing non-user data, e.g. wobbled address, prepits, BCA
-
- 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
- G11B7/00718—Groove and land recording, i.e. user data recorded both in the grooves and on the lands
-
- 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
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0908—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only
- G11B7/0912—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only by push-pull method
Landscapes
- Optical Recording Or Reproduction (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
An information storage medium and a method of recording data on and/or reproducing data from the information storage medium, includes an information storage medium having at least one information storage layer. Data is recorded in the form of protruding or indented pits in the entire or partial area of the information storage medium, and information regarding the protruding or indented pits is recorded. Smooth tracking can be achieved using the information regarding the protruding or indented pits, that is, push-pull polarity information.
Description
Description INFORMATION STORAGE MEDIUM AND METHOD
AND APPARATUS OF RECORDING AND/OR RE-PRODUCING DATA ON AND/OR FROM THE SAME
Technical Field [1] The present invention relates to an optical information storage medium on which trying polarity data corresponding to the form of pits is recorded, and a method and apparatus of recording and/or reprodu~ng data on and/or from the optical information storage medium.
Background Art [2] General optical disks, which are optical information storage media, are classified as mmp~t disks (CDs) or digital versatile disks (DVDs) wording to their in-formation storage cap~aty. The optical disks may also be classified as mini disks (MDs) with diameters of 65mm or less. Furthermore, disks having a recording cap~ity of 20GB or greater are under development.
AND APPARATUS OF RECORDING AND/OR RE-PRODUCING DATA ON AND/OR FROM THE SAME
Technical Field [1] The present invention relates to an optical information storage medium on which trying polarity data corresponding to the form of pits is recorded, and a method and apparatus of recording and/or reprodu~ng data on and/or from the optical information storage medium.
Background Art [2] General optical disks, which are optical information storage media, are classified as mmp~t disks (CDs) or digital versatile disks (DVDs) wording to their in-formation storage cap~aty. The optical disks may also be classified as mini disks (MDs) with diameters of 65mm or less. Furthermore, disks having a recording cap~ity of 20GB or greater are under development.
[3] The optical disks may be further classified as read-only disks or rewritable disks.
Examples of the read-only disks are CD-ROM (read only memory) and DVD-ROM.
Examples of rewritable disks are CD ~ R/RW, DVD ~ R/RW, and DVD-RAM
(random mess memory). CD-R and DVD-R can perform recording only once, CD-RW and DVD-RW can perform recording and/or reproduction about 1000 times, and DVD-RAM can perform recording and/or reproduction several hundreds of thousands of times.
Examples of the read-only disks are CD-ROM (read only memory) and DVD-ROM.
Examples of rewritable disks are CD ~ R/RW, DVD ~ R/RW, and DVD-RAM
(random mess memory). CD-R and DVD-R can perform recording only once, CD-RW and DVD-RW can perform recording and/or reproduction about 1000 times, and DVD-RAM can perform recording and/or reproduction several hundreds of thousands of times.
[4] In general, data is recorded as pits on reproduction-only disks or read-only disks.
Since rewritable disks are coated with a phase changing material, data is recorded thereon aoo~rding to a phase change.
Since rewritable disks are coated with a phase changing material, data is recorded thereon aoo~rding to a phase change.
[5] In an apparatus for recording and/or reproducing data on and/or from an optical disc, a pickup aaurately follows a track on which user data has been recorded and receives a laser beam reflected from the try, thereby reading the user data. A
signal used when the pickup follows the track is referred to as a tracking signal.
The trying signal is obtained from a photo diode having a plurality of receiving portions, which receive a laser beam and adds or subtracts signals obtained from light received by the individual receiving portions. The tracking signal is shaped in an S-letter curve in which the left and right polarities are opposite to each other around its center.
signal used when the pickup follows the track is referred to as a tracking signal.
The trying signal is obtained from a photo diode having a plurality of receiving portions, which receive a laser beam and adds or subtracts signals obtained from light received by the individual receiving portions. The tracking signal is shaped in an S-letter curve in which the left and right polarities are opposite to each other around its center.
[6] The tr~lking signal has different polarities depending on the type of optical disk, that is, the physical char~teristics of a recording layer, for example, the physical shape of a pit, the physical shape of a track, and the like. For example, FIGS. lA
and 1B
show groove trues G and land trues L arranged in opposite ways. In FIG. lA, a trying signal has a polarity that changes from (+) to ( - ). In FIG. 1B, the tracking signal has a polarity that changes from ( - ) to (+). As described above, the polarity of a trying signal is classified as a polarity changing from ( - ) to (+) or a polarity changing from (+) to ( - ). A trying signal is differently processed depending on the polarity of the tracking signal. Hence, if the polarity of a tracking signal is wrongly recognized, data may not be properly reprod~ed. Accordingly, when an optical disk is loaded, a conventional recording and/or reprodu~ng apparatus recognizes the polarity of a tracking signal through trial and error and then follows a try on which user data has been recorded, based on the information about the recognized polarity. In this way, the user data is read from the optical disk.
Disclosure of Invention Technical Problem [7] Thus, the conventional reprodu~ng apparatus spends some time obtaining in-formation about the polarity of a tracking signal before reading out user data. This impedes immediate reprod~tion of user data.
and 1B
show groove trues G and land trues L arranged in opposite ways. In FIG. lA, a trying signal has a polarity that changes from (+) to ( - ). In FIG. 1B, the tracking signal has a polarity that changes from ( - ) to (+). As described above, the polarity of a trying signal is classified as a polarity changing from ( - ) to (+) or a polarity changing from (+) to ( - ). A trying signal is differently processed depending on the polarity of the tracking signal. Hence, if the polarity of a tracking signal is wrongly recognized, data may not be properly reprod~ed. Accordingly, when an optical disk is loaded, a conventional recording and/or reprodu~ng apparatus recognizes the polarity of a tracking signal through trial and error and then follows a try on which user data has been recorded, based on the information about the recognized polarity. In this way, the user data is read from the optical disk.
Disclosure of Invention Technical Problem [7] Thus, the conventional reprodu~ng apparatus spends some time obtaining in-formation about the polarity of a tracking signal before reading out user data. This impedes immediate reprod~tion of user data.
[8] The polarity of a trying signal can be changed by the physical shape of a pit. The physical shape of a pit may be different depending on the type of disk.
Fbwever, in the related art, extra information about the polarity of a trying signal depending on the physical shape of a pit is not recorded on a disk, so that the reliability of data recording and/or reproduction is degraded. Also, the conventional reprodu~ng apparatus spends some time obtaining information about the polarity of a trying signal through trial and error, delaying recording and/or reprod~tion.
Technical Solution [9] The present invention provides an optical information storage medium on which information about a tracking polarity depending on a pit shape, particularly, in-formation about a push-pull polarity, has been recorded, and a method of recording and/or reproducing data on and/or from the optical information storage medium.
Fbwever, in the related art, extra information about the polarity of a trying signal depending on the physical shape of a pit is not recorded on a disk, so that the reliability of data recording and/or reproduction is degraded. Also, the conventional reprodu~ng apparatus spends some time obtaining information about the polarity of a trying signal through trial and error, delaying recording and/or reprod~tion.
Technical Solution [9] The present invention provides an optical information storage medium on which information about a tracking polarity depending on a pit shape, particularly, in-formation about a push-pull polarity, has been recorded, and a method of recording and/or reproducing data on and/or from the optical information storage medium.
[10] Am~rding to an aspect of the present invention, there is provided an information storage medium having at least one information storage layer, wherein data is recorded in the form of protruding or indented pits in the entire or partial area of the information storage medium, and information regarding the protruding or indented pits is recorded.
[11] Am~rding to an aspect of the present invention, the information regarding the protruding or indented pits is push-pull polarity information.
[12] Am~rding to an aspect of the present invention, the information regarding the protruding or indented pits is recorded in or in front of a frame sync.
[13] Am~rding to an aspect of the present invention, the information storage medium includes a burst cutting area (BCA) and a lead-in area, one of which stores the in-formation regarding the protruding or indented pits.
[14] Am~rding to an aspect of the present invention, the protruding or indented pits may be wobbling pits.
[15] Am~rding to an aspect of the present invention, data is decoded by performing an exclusive OR operation with respect to the push-pull polarity information and data reproduced from the protruding or indented pits.
[16] Am~rding to another aspect of the present invention, there is provided a method of recording data on and/or reproducing data from an information storage medium having at least one information storage layer, the method including recording data in the form of protruding or indented pits in the entire or partial area of the information storage medium and recording information regarding the protruding or indented pits.
[17] This method further includes reproducing the push-pull polarity information and recording data on or reprodu~ng data from the information storage medium by performing trying on the basis of the reproduced push-pull polarity information.
[18] Additional aspects and/or advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by pr~tice of the invention.
Advantageous Effects [19] In an information storage medium wording to the present invention, trying polarity information (i.e., push-pull polarity information) with respect to protruding pits and indented pits is recorded so that data can be reliably recorded or reproduced without trials and errors for obtaining trying polarity information. Also, if data is recorded in the form of pits, e~h of the pits may have various shapes, like, indented or protruding pits.
Description of Drawings [20] The above and/or other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings in which:
Advantageous Effects [19] In an information storage medium wording to the present invention, trying polarity information (i.e., push-pull polarity information) with respect to protruding pits and indented pits is recorded so that data can be reliably recorded or reproduced without trials and errors for obtaining trying polarity information. Also, if data is recorded in the form of pits, e~h of the pits may have various shapes, like, indented or protruding pits.
Description of Drawings [20] The above and/or other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings in which:
[21] FIGS. lA and 1B show different trying polarities depending on a configuration of groove trues and land trades;
[22] FIG. 2A shows protruding pits formed on a substrate of an information storage medium aoo~rding to an embodiment the present invention;
[23] FIG. 2B shows indented pits formed on the substrate of the information storage medium aoo~rding to an embodiment the present invention;
[24] FIG. 3A is a graph showing the amplitudes of a differential phase detection (DPD) signal and a radio frequency (RF) signal versus time in an information storage medium on which data is formed as protruding pits;
[25] FIG. 3B is a graph showing the amplitudes of a DPD signal and an RF
signal versus time in an information storage medium on which data is formed as indented pits;
signal versus time in an information storage medium on which data is formed as indented pits;
[26] FIG. 4A is a graph showing a push-pull signal versus time in an information storage medium on which data is formed as protruding pits;
[27] FIG. 4B is a graph showing a push-pull signal versus time in an information storage medium on which data is formed as indented pits;
[28] FIG. 5 shows an example in which tracking polarity data is recorded in a sync pattern on an information storage medium ~rording to an embodiment of the present invention;
[29] FIGS. 6A and 6B show different examples of the location of the information storage medium aoo~rding to an embodiment of the present invention where trying polarity information has been recorded in a specafic pattern;
[30] FIGS. 7A and 7B show different layouts of an information storage medium wording to another embodiment of the present invention;
[31] FIG. 8A schematically shows a structure of an information area of a recordable in-formation storage medium;
[32] FIG. 8B schematically shows a structure of an information area of a reproduction-only information storage medium;
[33] FIG. 9A shows a straight array of pits, and FIG. 9B shows a wobbling array of pits;
[3~] FIG. 10 shows an example in which trying polarity information has been recorded on an information storage medium wording to another embodiment of the present invention;
[35] FIGS. 11A and 11B are views illustrating a decoding method based on an exclusive OR (XOR) operation of trying polarity data and data that is detected from a data frame in the information storage medium girding to another embodiment of the present invention;
[36] FIG. 12 is a flowchart illustrating a data recording and/or reproducing method wording to another embodiment of the present invention ; and [37] FIG. 13 schematically illustrates an apparatus for recording data in and/or re-producing data from an information storage medium wording to the present invention.
Mode for Invention [38] Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the ~ompanying drawings, wherein like reference numerals refer to the like elements throughout. The embodiments are described below to explain the present invention by referring to the figures.
[39] As shown in FIG. 2A, in an optical information storage medium wording to an embodiment of the present invention, data is recorded as protruding pits 10 on a substrate 5. Alternatively, as shown in FIG. 2B, data is recorded as indented pits 13 on the substrate 5. Information about the protruding pits 10 or the indented pits 13 is recorded in the optical information storage medium [40] The information about the protruding or indented pits 10 or 13 may be tracking polarity information.
[41] When data has been recorded in the form of the protruding pits 10, a tracking signal may have a polarity that changes from (+) to ( - ). When data has been recorded in the form of the indented pits 13, a trying signal may have a polarity that changes from ( - ) to (+). As described above, because the polarity of a tracking signal varies depending on the shape of a pit, the trying signal must be performed differently depending on the pit shape so that data can be normally recorded or reproduced.
[42] The conditions and results of a simulation performed to ascertain the char teristics of a tracking signal are shown in Table 1.
[43] [Table 1]
[44]
LD wavelength ( ~, ) 400nm Numerical aperture of objective 0.85 lens Groove structure Track pitch: 0.32 ~, m Length of minimum mark 0.149 ~,~ m Mark width 0.15 ~, m Modulation technique RLL (1,7) [45] In Table 1, an RLL modulation technique is based on how many bits '0' exist between two bits '1'. RLL (m,k) represents that at least m bits '0' exist between two bits '1' and at most k bits '0' exists therebetween. For example, RLL (1, 7) represents that at least one bit '0' exists between two bits ' 1' and at most 7 bits '0' exist therebetween.
Am~rding to the RLL (m, k) modulation technique, when m is 1, data ' 1010101' is recorded, and a pit with a 2T length exists between two bits '1'. When m is 7, data '10000000100000001' is recorded, and a pit with an 8T length exists between two bits ' 1'. Here, T denotes the length of a minimum mark, that is, a minimum pit.
Hence, in the RLL (1,7) modulation method, data is recorded in the form of pits ranging in length from 2T to 8T and spies.
[46] FIG. 3A shows a radio frequency (RF) signal and a differential phase detection (DPD) signal when data has been recorded in the form of the protruding pits 10. FIG.
3B shows an RF signal and a DPD signal when data has been recorded in the form of the indented pits 13. Referring to FIGS. 3A and 3B, the DPD signal does not depend on the shape of a pit.
[47] FIG. 4A shows a push-pull signal when data has been recorded in the form of the protruding pits 10, and FIG. 4B shows a push-pull signal when data has been recorded in the form of the indented pits 13. Referring to FIGS. 4A and 4B, the push-pull signal depends on the shape of a pit. Hence, if data is reproduced or tracked using the push-pull signal, information about a tracking polarity depending on a pit shape needs to be recorded. Am~rdingly, the information about the tracking polarity may be information about the polarity of a push-pull signal.
[48] When recording information about a trying polarity, as shown in FIG. 5, an optical information storage medium wording to an embodiment of the present inv ention includes a plurality of data frames 15, and information about a trying polarity, that is, push-pull polarity information. The push-pull polarity information can be recorded in a sync pattern on a frame sync 14 included in front of an area including a predetermined number of data frames 15. The sync pattern may be a pattern not used as a user data pattern or a pattern of specafic bits. An example of the sync pattern is shown in FIG. 5.
[49] For example, the sync pattern can be formed of a repetition of identical data to represent tracking polarity information. If values '1' are read out consecutively, this means that data is recorded in the form of protruding pits. If values '0' are read out con-secutively, this means that data is recorded in the form of indented pits.
[50] Alternatively, tracking polarity information, that is, push-pull polarity information, may be recorded in a sync pattern of a specific pattern. For example, as shown in FIG.
6A, data '010' is recorded in the frame sync 14 and represents a polarity changing from (+) to ( - ). In this case, if data ' 101' is reproduced after trying, the polarity of a trying signal is processed conversely so that data can be properly reproduced.
In FIG. 6A, the trying polarity information has been recorded in the frame sync 14.
Fbwever, as shown in FIG. 6B, the tracking polarity information may be recorded in a predetermined area 12 in front of the frame sync 14. As described above, the tracking polarity information may be recorded in a part of the frame sync 14 or an area other than the frame sync 14.
[51] FIG. 7A and 7B show different layouts of an information storage medium wording to another embodiment of the present invention. This information storage medium includes a clamping area C, a burst cutting area (BCA) area B, a lead-in area LI, a user data area U, and a lead-out area LO. The clamping area C denotes an area which is pressed down by a clamping apparatus for clamping a disc.
[52] Tracking polarity information may be recorded in the BCA area B. Unique in-formation about a disc, such as, a serial number, a manufactured day/month/year, and the like, may also be recorded in the BCA area B. In FIG. 7A, the BCA area B
is located between the clamping area C and the lead-in area LI. I~wever, as shown in FIG. 7B, the BCA area B may be located in front of the clamping area C.
[53] When tracking polarity information is recorded in the BCA area B, it can be read out before a disc is tried after the disc is loaded on a drive and foazsed.
Thus, a trying servo can be efficiently implemented.
[54] The trying polarity information may also be recorded in the lead-in area LI
instead of the BCA area B.
[55] FIG. 8A shows a layout of a remrdable information storage medium. Data can be recorded in the form of pits in a part of the remrdable information storage medium, for example, in a lead-in area or a lead-out area. Information about the shapes of the pits, that is, tracking polarity information, can be recorded in the lead-in area, preferably, in a disc related information area.
[56] FIG. 8B shows a layout of a reproduction-only information storage medium.
The trying polarity information can be recorded in a disc related information area included in a lead-in area. The tracking polarity information includes push-pull polarity information.
[57] If data is recorded in the form of pits, the pits may be arrayed either in a straight line as shown in FIG. 9A or in a wobbly line as shown in FIG. 9B. When data has been recorded in the form of a straight line of pits, the data recorded in the pits is WO 2004/105000 $ PCT/KR2004/001205 reproduced using a sum channel, and trying can be controlled using DPD or the push-pull technique. If tracking is controlled using the push-pull technique, in-formation about a tradking polarity, that is, push-pull polarity information, is required.
[58] When data has been recorded in the form of a wobbly line of pits (hereinafter, referred to as wobbling pits), additional information can be recorded in the wobbles themselves. The data recorded in the wobbling pits is reproduced using a sum channel, and the additional information recorded in the wobbles can be reproduced using a push-pull channel.
[59] Wobbling pits can be arrayed in a single pattern, which is composed of pits each having identical lengths and spaces. In the single pattern of pits, the pits have no data, and instead the wobble may have data. In this case, a push-pull channel may be used as a channel for reproducing data stored in the wobbling pits.
[60] When data is recorded in the form of wobbling pits, it can be recorded using various modulation techniques. For example, data can be recorded using at least one of a phase modulation technique, a frequency modulation technique, and an amplitude modulation technique.
[61] Referring to FIG. 10, in an information storage medium arxording to another embodiment of the present invention, tradking polarity information is recorded in an area in front of a predetermined data frame, and although data is recorded in different forms, the data in different forms is decoded into identical data by performing an exclusive OR (XOR) operation with respect to the tr~king polarity information and data read out with the tr~king polarity information. The tr~king polarity information may be recorded in a frame sync.
[62] A method of decoding data using an XOR operation when the data has been recorded in the forms of protruding pits or indented pits will now be described. When data recorded in the form of protruding pits is tr~lked, tradking polarity information is read as, for example, '0', and data is read as, for example, '11001...'. When the same data has been recorded in the form of indented pits, tr~king polarity information is read as, for example, ' 1', and data is read as, for example, '00110. . .'.
[63] Referring to FIG. 11A, if tr~king polarity information regarding indented pits is recorded as data '0', and data detected from an n-th data frame is ' 11001. .
.', the tr~king polarity data and the data detected from the n-th data frame undergo an XOR
operation to obtain decoded data ' 11001. . .'.
[64] Referring to FIG. 11B, if tr~king polarity information regarding protruding pits is recorded as data ' 1', and data detected from an n-th data frame is '00110. .
.', the WO 2004/105000 g PCT/KR2004/001205 trying polarity data and the data detected from the n-th data frame undergo an XOR
operation to obtain decoded data ' 11001. . .'.
[65] As described above, since data is decoded using an XOR operation with respect to trying polarity data and data reproduced from pits, data can be properly reproduced and restored regardless of whether the pits are protruding pits or indented pits. Also, decoded data can be obtained without extra change in a controlling operation.
[66] Furthermore, data read out by using tracking polarity information, that is, push-pull polarity information, as a selection signal can be either directly output as decoded data or output as decoded data after the polarity of the data is reversed. In other words, if trying polarity information is recorded in a predetermined pattern, and read-out trying polarity information is the same as the predetermined pattern, data is directly decoded. Fbwever, if tracking polarity information is recorded in a predetermined pattern, and read-out tracking polarity information is different from the predetermined pattern, data is decoded after its polarity is reversed.
[67] The information storage medium arxording to the present invention is applicable to multi-layered information storage media with at least two information storage layers as well as to single-layered information storage media.
[68] FIG. 12 is a flowchart illustrating a data recording and/or reproducing method wording to an embodiment of the present invention. Referring to FIG. 12, in operation 50, an information storage medium is loaded on a disk drive. In operation 55, an optical pickup included in the disk drive reads trying polarity information, that is, push-pull polarity information, from the loaded information storage medium.
The trying polarity information is recorded as in the embodiments described above and used as a basis on which a tracking signal is detected or data is recorded and/or reproduced.
[69] Because a trying polarity varies depending on the protruding pits 10 of FIG. 2A
or the indented pits 13 of FIG. 2B, a trying signal is differently processed aoo~rding to trying polarity information. If tracking polarity information is recorded in the BCA area B, an information storage medium is first loaded on a disk drive, and then foazsing control is Thieved, and the trying polarity information is read from the BCA area B before data is read from the loaded information storage medium.
Thus, trying control and information reproduction are reliable.
[70] In operation 60, the disk drive records data on or reproduces data from a data area by performing tracking control without trials and errors on the basis of the reproduced trying polarity information, that is, push-pull polarity information. In other words, the optical pickup provides the reproduced trying polarity information to the disk drive, and the disk drive controls the optical pickup on the basis of the received in-formation so that data is smoothly recorded on or reproduced from the information storage medium.
[71] Data can be decoded by performing an XOR operation with respect to tracking polarity data and data reproduced from pits. Thus, data can be decoded regardless of a trying polarity.
[72] Data reproduced on the basis of the tracking polarity information may be either directly output as decoded data or output as decoded data after its polarity is reversed.
In other words, if trying polarity information is recorded in a predetermined pattern, and read-out tracking polarity information is the same as the predetermined pattern, data is directly decoded. On the other hand, if trying polarity information is recorded in a predetermined pattern, and read-out tracking polarity information is different from the predetermined pattern, data is decoded after its polarity is reversed.
[73] FIG. 13 schematically illustrates an apparatus for recording data in and/or re-producing data from an information storage medium wording to the present invention. The apparatus includes a pinup 50, a recording/reproducing signal processor 60, and a controller 70. More specifically, the pickup 50 includes a laser diode 51 for radiating light, a collimating lens 52 for collimating the light emitted by the laser diode 51, a beam sputter 54 for changing a path of incident light, and an objective lens 56 for foazsing light passed through the beam sputter 54 on an in-formation storage medium D.
[74] Light reflected by the information storage medium D is reflected by the beam sputter 54 and received by a photodetector, for example, a 4-divisional photodetector 57. The light incident upon the 4-divisional photodetector 57 is converted into an electrical signal while passing through an operational circuit 58. An RF
signal, that is, a sum signal is output via a first channel Chl and a differential signal used in a push-pull technique via a second channel Ch 2.
[75] When the information storage medium D is loaded, the controller 70 controls the pickup 50 to project a beam onto the information storage medium D and reads out a signal into which a beam reflected by the information storage medium D is converted by the signal processor 60. More specifically, the beam reflected by the information storage medium D is applied to the photodetector 57 via the objective lens 56 and the beam sputter 54. The beam incident upon the photodetector 57 is converted into an electrical signal by the operational circuit 58, and the electrical signal is output as an RF signal.
[76] The signal processor 60 processes a data signal girding to trying polarity in-formation read out from the information storage medium D. T he controller 70 controls the pinup 50 based on the data signal processed by the signal processor 60.
[3~] FIG. 10 shows an example in which trying polarity information has been recorded on an information storage medium wording to another embodiment of the present invention;
[35] FIGS. 11A and 11B are views illustrating a decoding method based on an exclusive OR (XOR) operation of trying polarity data and data that is detected from a data frame in the information storage medium girding to another embodiment of the present invention;
[36] FIG. 12 is a flowchart illustrating a data recording and/or reproducing method wording to another embodiment of the present invention ; and [37] FIG. 13 schematically illustrates an apparatus for recording data in and/or re-producing data from an information storage medium wording to the present invention.
Mode for Invention [38] Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the ~ompanying drawings, wherein like reference numerals refer to the like elements throughout. The embodiments are described below to explain the present invention by referring to the figures.
[39] As shown in FIG. 2A, in an optical information storage medium wording to an embodiment of the present invention, data is recorded as protruding pits 10 on a substrate 5. Alternatively, as shown in FIG. 2B, data is recorded as indented pits 13 on the substrate 5. Information about the protruding pits 10 or the indented pits 13 is recorded in the optical information storage medium [40] The information about the protruding or indented pits 10 or 13 may be tracking polarity information.
[41] When data has been recorded in the form of the protruding pits 10, a tracking signal may have a polarity that changes from (+) to ( - ). When data has been recorded in the form of the indented pits 13, a trying signal may have a polarity that changes from ( - ) to (+). As described above, because the polarity of a tracking signal varies depending on the shape of a pit, the trying signal must be performed differently depending on the pit shape so that data can be normally recorded or reproduced.
[42] The conditions and results of a simulation performed to ascertain the char teristics of a tracking signal are shown in Table 1.
[43] [Table 1]
[44]
LD wavelength ( ~, ) 400nm Numerical aperture of objective 0.85 lens Groove structure Track pitch: 0.32 ~, m Length of minimum mark 0.149 ~,~ m Mark width 0.15 ~, m Modulation technique RLL (1,7) [45] In Table 1, an RLL modulation technique is based on how many bits '0' exist between two bits '1'. RLL (m,k) represents that at least m bits '0' exist between two bits '1' and at most k bits '0' exists therebetween. For example, RLL (1, 7) represents that at least one bit '0' exists between two bits ' 1' and at most 7 bits '0' exist therebetween.
Am~rding to the RLL (m, k) modulation technique, when m is 1, data ' 1010101' is recorded, and a pit with a 2T length exists between two bits '1'. When m is 7, data '10000000100000001' is recorded, and a pit with an 8T length exists between two bits ' 1'. Here, T denotes the length of a minimum mark, that is, a minimum pit.
Hence, in the RLL (1,7) modulation method, data is recorded in the form of pits ranging in length from 2T to 8T and spies.
[46] FIG. 3A shows a radio frequency (RF) signal and a differential phase detection (DPD) signal when data has been recorded in the form of the protruding pits 10. FIG.
3B shows an RF signal and a DPD signal when data has been recorded in the form of the indented pits 13. Referring to FIGS. 3A and 3B, the DPD signal does not depend on the shape of a pit.
[47] FIG. 4A shows a push-pull signal when data has been recorded in the form of the protruding pits 10, and FIG. 4B shows a push-pull signal when data has been recorded in the form of the indented pits 13. Referring to FIGS. 4A and 4B, the push-pull signal depends on the shape of a pit. Hence, if data is reproduced or tracked using the push-pull signal, information about a tracking polarity depending on a pit shape needs to be recorded. Am~rdingly, the information about the tracking polarity may be information about the polarity of a push-pull signal.
[48] When recording information about a trying polarity, as shown in FIG. 5, an optical information storage medium wording to an embodiment of the present inv ention includes a plurality of data frames 15, and information about a trying polarity, that is, push-pull polarity information. The push-pull polarity information can be recorded in a sync pattern on a frame sync 14 included in front of an area including a predetermined number of data frames 15. The sync pattern may be a pattern not used as a user data pattern or a pattern of specafic bits. An example of the sync pattern is shown in FIG. 5.
[49] For example, the sync pattern can be formed of a repetition of identical data to represent tracking polarity information. If values '1' are read out consecutively, this means that data is recorded in the form of protruding pits. If values '0' are read out con-secutively, this means that data is recorded in the form of indented pits.
[50] Alternatively, tracking polarity information, that is, push-pull polarity information, may be recorded in a sync pattern of a specific pattern. For example, as shown in FIG.
6A, data '010' is recorded in the frame sync 14 and represents a polarity changing from (+) to ( - ). In this case, if data ' 101' is reproduced after trying, the polarity of a trying signal is processed conversely so that data can be properly reproduced.
In FIG. 6A, the trying polarity information has been recorded in the frame sync 14.
Fbwever, as shown in FIG. 6B, the tracking polarity information may be recorded in a predetermined area 12 in front of the frame sync 14. As described above, the tracking polarity information may be recorded in a part of the frame sync 14 or an area other than the frame sync 14.
[51] FIG. 7A and 7B show different layouts of an information storage medium wording to another embodiment of the present invention. This information storage medium includes a clamping area C, a burst cutting area (BCA) area B, a lead-in area LI, a user data area U, and a lead-out area LO. The clamping area C denotes an area which is pressed down by a clamping apparatus for clamping a disc.
[52] Tracking polarity information may be recorded in the BCA area B. Unique in-formation about a disc, such as, a serial number, a manufactured day/month/year, and the like, may also be recorded in the BCA area B. In FIG. 7A, the BCA area B
is located between the clamping area C and the lead-in area LI. I~wever, as shown in FIG. 7B, the BCA area B may be located in front of the clamping area C.
[53] When tracking polarity information is recorded in the BCA area B, it can be read out before a disc is tried after the disc is loaded on a drive and foazsed.
Thus, a trying servo can be efficiently implemented.
[54] The trying polarity information may also be recorded in the lead-in area LI
instead of the BCA area B.
[55] FIG. 8A shows a layout of a remrdable information storage medium. Data can be recorded in the form of pits in a part of the remrdable information storage medium, for example, in a lead-in area or a lead-out area. Information about the shapes of the pits, that is, tracking polarity information, can be recorded in the lead-in area, preferably, in a disc related information area.
[56] FIG. 8B shows a layout of a reproduction-only information storage medium.
The trying polarity information can be recorded in a disc related information area included in a lead-in area. The tracking polarity information includes push-pull polarity information.
[57] If data is recorded in the form of pits, the pits may be arrayed either in a straight line as shown in FIG. 9A or in a wobbly line as shown in FIG. 9B. When data has been recorded in the form of a straight line of pits, the data recorded in the pits is WO 2004/105000 $ PCT/KR2004/001205 reproduced using a sum channel, and trying can be controlled using DPD or the push-pull technique. If tracking is controlled using the push-pull technique, in-formation about a tradking polarity, that is, push-pull polarity information, is required.
[58] When data has been recorded in the form of a wobbly line of pits (hereinafter, referred to as wobbling pits), additional information can be recorded in the wobbles themselves. The data recorded in the wobbling pits is reproduced using a sum channel, and the additional information recorded in the wobbles can be reproduced using a push-pull channel.
[59] Wobbling pits can be arrayed in a single pattern, which is composed of pits each having identical lengths and spaces. In the single pattern of pits, the pits have no data, and instead the wobble may have data. In this case, a push-pull channel may be used as a channel for reproducing data stored in the wobbling pits.
[60] When data is recorded in the form of wobbling pits, it can be recorded using various modulation techniques. For example, data can be recorded using at least one of a phase modulation technique, a frequency modulation technique, and an amplitude modulation technique.
[61] Referring to FIG. 10, in an information storage medium arxording to another embodiment of the present invention, tradking polarity information is recorded in an area in front of a predetermined data frame, and although data is recorded in different forms, the data in different forms is decoded into identical data by performing an exclusive OR (XOR) operation with respect to the tr~king polarity information and data read out with the tr~king polarity information. The tr~king polarity information may be recorded in a frame sync.
[62] A method of decoding data using an XOR operation when the data has been recorded in the forms of protruding pits or indented pits will now be described. When data recorded in the form of protruding pits is tr~lked, tradking polarity information is read as, for example, '0', and data is read as, for example, '11001...'. When the same data has been recorded in the form of indented pits, tr~king polarity information is read as, for example, ' 1', and data is read as, for example, '00110. . .'.
[63] Referring to FIG. 11A, if tr~king polarity information regarding indented pits is recorded as data '0', and data detected from an n-th data frame is ' 11001. .
.', the tr~king polarity data and the data detected from the n-th data frame undergo an XOR
operation to obtain decoded data ' 11001. . .'.
[64] Referring to FIG. 11B, if tr~king polarity information regarding protruding pits is recorded as data ' 1', and data detected from an n-th data frame is '00110. .
.', the WO 2004/105000 g PCT/KR2004/001205 trying polarity data and the data detected from the n-th data frame undergo an XOR
operation to obtain decoded data ' 11001. . .'.
[65] As described above, since data is decoded using an XOR operation with respect to trying polarity data and data reproduced from pits, data can be properly reproduced and restored regardless of whether the pits are protruding pits or indented pits. Also, decoded data can be obtained without extra change in a controlling operation.
[66] Furthermore, data read out by using tracking polarity information, that is, push-pull polarity information, as a selection signal can be either directly output as decoded data or output as decoded data after the polarity of the data is reversed. In other words, if trying polarity information is recorded in a predetermined pattern, and read-out trying polarity information is the same as the predetermined pattern, data is directly decoded. Fbwever, if tracking polarity information is recorded in a predetermined pattern, and read-out tracking polarity information is different from the predetermined pattern, data is decoded after its polarity is reversed.
[67] The information storage medium arxording to the present invention is applicable to multi-layered information storage media with at least two information storage layers as well as to single-layered information storage media.
[68] FIG. 12 is a flowchart illustrating a data recording and/or reproducing method wording to an embodiment of the present invention. Referring to FIG. 12, in operation 50, an information storage medium is loaded on a disk drive. In operation 55, an optical pickup included in the disk drive reads trying polarity information, that is, push-pull polarity information, from the loaded information storage medium.
The trying polarity information is recorded as in the embodiments described above and used as a basis on which a tracking signal is detected or data is recorded and/or reproduced.
[69] Because a trying polarity varies depending on the protruding pits 10 of FIG. 2A
or the indented pits 13 of FIG. 2B, a trying signal is differently processed aoo~rding to trying polarity information. If tracking polarity information is recorded in the BCA area B, an information storage medium is first loaded on a disk drive, and then foazsing control is Thieved, and the trying polarity information is read from the BCA area B before data is read from the loaded information storage medium.
Thus, trying control and information reproduction are reliable.
[70] In operation 60, the disk drive records data on or reproduces data from a data area by performing tracking control without trials and errors on the basis of the reproduced trying polarity information, that is, push-pull polarity information. In other words, the optical pickup provides the reproduced trying polarity information to the disk drive, and the disk drive controls the optical pickup on the basis of the received in-formation so that data is smoothly recorded on or reproduced from the information storage medium.
[71] Data can be decoded by performing an XOR operation with respect to tracking polarity data and data reproduced from pits. Thus, data can be decoded regardless of a trying polarity.
[72] Data reproduced on the basis of the tracking polarity information may be either directly output as decoded data or output as decoded data after its polarity is reversed.
In other words, if trying polarity information is recorded in a predetermined pattern, and read-out tracking polarity information is the same as the predetermined pattern, data is directly decoded. On the other hand, if trying polarity information is recorded in a predetermined pattern, and read-out tracking polarity information is different from the predetermined pattern, data is decoded after its polarity is reversed.
[73] FIG. 13 schematically illustrates an apparatus for recording data in and/or re-producing data from an information storage medium wording to the present invention. The apparatus includes a pinup 50, a recording/reproducing signal processor 60, and a controller 70. More specifically, the pickup 50 includes a laser diode 51 for radiating light, a collimating lens 52 for collimating the light emitted by the laser diode 51, a beam sputter 54 for changing a path of incident light, and an objective lens 56 for foazsing light passed through the beam sputter 54 on an in-formation storage medium D.
[74] Light reflected by the information storage medium D is reflected by the beam sputter 54 and received by a photodetector, for example, a 4-divisional photodetector 57. The light incident upon the 4-divisional photodetector 57 is converted into an electrical signal while passing through an operational circuit 58. An RF
signal, that is, a sum signal is output via a first channel Chl and a differential signal used in a push-pull technique via a second channel Ch 2.
[75] When the information storage medium D is loaded, the controller 70 controls the pickup 50 to project a beam onto the information storage medium D and reads out a signal into which a beam reflected by the information storage medium D is converted by the signal processor 60. More specifically, the beam reflected by the information storage medium D is applied to the photodetector 57 via the objective lens 56 and the beam sputter 54. The beam incident upon the photodetector 57 is converted into an electrical signal by the operational circuit 58, and the electrical signal is output as an RF signal.
[76] The signal processor 60 processes a data signal girding to trying polarity in-formation read out from the information storage medium D. T he controller 70 controls the pinup 50 based on the data signal processed by the signal processor 60.
Claims (25)
1. An information storage medium comprising:
at least one information storage layer, wherein data is recorded in a form of protruding or indented pits in an entire or partial area of the information storage medium, and a burst cutting area in which tracking polarity information regarding the protruding or indented pits is recorded.
at least one information storage layer, wherein data is recorded in a form of protruding or indented pits in an entire or partial area of the information storage medium, and a burst cutting area in which tracking polarity information regarding the protruding or indented pits is recorded.
2. The information storage medium of claim 1, wherein the information regarding the protruding or indented pits is push-pull polarity information.
3. The information storage medium of claim 1, wherein the information regarding the protruding or indented pits is recorded in or in front of a frame sync.
4. The information storage medium of claim 1, wherein a lead-in area is included to store the information regarding the protruding or indented pits.
5. The information storage medium of claim 1, wherein the protruding or indented pits are wobbling pits.
6. The information storage medium of claim 5, wherein additional information is recorded in wobbles of the wobbling pits.
7. The information storage medium of claim 6, wherein the additional information is recorded using at least one of a phase modulation technique, a frequency modulation technique, and an amplitude modulation technique.
8. The information storage medium of claim 6, wherein the data recorded in the wobbling pits is reproduced using a sum channel, and the additional information is reproduced using a push-pull channel.
9. The information storage medium of claim 2, wherein the data is decoded by performing an exclusive OR operation with respect to the push-pull polarity information and the data that is reproduced from the protruding or indented pits.
10. The information storage medium of claim 2, wherein the data reproduced from the protruding or indented pits is directly output as decoded data or output as decoded data after a polarity of the data is reversed, wording to the push- pull polarity information.
11. The information storage medium of claim 1, further comprising a clamping area, a lead in area, a user data area, and a lead-out area.
12. The information storage medium of claim 1, wherein the data is decoded using an XOR operation with respect to tracking polarity information and the data reproduced from the pits.
13. The information storage medium of claim 1, wherein the data reproduced from the pits using the tracking polarity information is directly output as decoded data or output as decoded data after a polarity of the data is reversed.
14. The information storage medium of claim 2, wherein the push-pull polarity information is recorded so that the data is reliably recorded or reproduced without trails and errors for obtaining tracking polarity information.
15. A method of recording data on and/or reproducing data from an information storage medium having at least one information storage layer, the method comprising:
recording data in a form of protruding or indented pits in an entire or partial area of the information storage medium; and recording tracking polarity information regarding the protruding or indented pits at a burst cutting area of the information storage medium.
recording data in a form of protruding or indented pits in an entire or partial area of the information storage medium; and recording tracking polarity information regarding the protruding or indented pits at a burst cutting area of the information storage medium.
16. The method of claim 15, wherein the information regarding the protruding or indented pits is push-pull polarity information.
17. The method of claim 15, further comprising:
reproducing the push-pull polarity information; and recording data on or reproducing data from the information storage medium by performing tracking based on the reproduced push-pull polarity information.
reproducing the push-pull polarity information; and recording data on or reproducing data from the information storage medium by performing tracking based on the reproduced push-pull polarity information.
18. The method of claim 15, wherein the information regarding the protruding or indented pits is recorded in front of a frame sync.
19. The method of claim 15, wherein the protruding or indented pits are wobbling pits.
20. The method of claim 17, wherein additional information is recorded in wobbles of the wobbling pits.
21. The method of claim 20, wherein the additional information is recorded using at least one of a phase modulation technique, a frequency modulation technique, and an amplitude modulation technique.
22. The method of claim 20, wherein the data recorded in the form of the wobbling pits is reproduced using a sum channel, and the additional information is reproduced using a push-pull channel.
23. The method of claim 15, further comprising decoding the data by performing an exclusive OR operation with respect to the push-pull polarity information and the data that is reproduced from the protruding or indented pits.
24. The method of claim 15, wherein the data reproduced from the protruding or indented pits is either directly output as decoded data or output as decoded data after a polarity of the data is reversed, according to the push-pull polarity information.
25. An apparatus for reproducing data recorded on an information storage medium, the apparatus comprising:
a pickup projecting a beam onto a burst cutting area of an information storage medium in which information regarding protruding or indented pits is recorded as push-pull polarity information;
a reproduction signal processor processing a data signal based on the push-pull polarity information received from the pickup; and a controller controlling the pickup based on the data signal processed by the re-production signal processor.
a pickup projecting a beam onto a burst cutting area of an information storage medium in which information regarding protruding or indented pits is recorded as push-pull polarity information;
a reproduction signal processor processing a data signal based on the push-pull polarity information received from the pickup; and a controller controlling the pickup based on the data signal processed by the re-production signal processor.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020030032092A KR100750111B1 (en) | 2003-05-20 | 2003-05-20 | Information storage medium and apparatus of recording on and/or reproducing data from the same |
| KR10-2003-0032092 | 2003-05-20 | ||
| US48515703P | 2003-07-08 | 2003-07-08 | |
| US60/485,157 | 2003-07-08 | ||
| PCT/KR2004/001205 WO2004105000A1 (en) | 2003-05-20 | 2004-05-20 | Information storage medium and method and apparatus of recording and/or reproducing data on and/or from the same |
Publications (2)
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|---|---|
| CA2515489A1 CA2515489A1 (en) | 2004-12-02 |
| CA2515489C true CA2515489C (en) | 2014-07-08 |
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| CA2515489A Expired - Lifetime CA2515489C (en) | 2003-05-20 | 2004-05-20 | Information storage medium and method and apparatus of recording and/or reproducing data on and/or from the same |
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| JP2007323775A (en) * | 2006-06-02 | 2007-12-13 | Toshiba Corp | Optical recording medium, information recording method, and information reproducing method |
| WO2008129450A1 (en) * | 2007-04-18 | 2008-10-30 | Koninklijke Philips Electronics N.V. | System and method for storing the normalized push-pull ratio in a pre-formatted portion of a re-writable disc to facilitate the smooth performance of a tracking servo |
| RU2623660C2 (en) * | 2015-11-23 | 2017-06-28 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Казанский национальный исследовательский технический университет им. А.Н. Туполева - КАИ" (КНИТУ-КАИ) | Method of detecting signals from the magnetic recorder, recorded by rll codes, and a detector for its implementation |
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| US5553051A (en) * | 1987-09-04 | 1996-09-03 | Hitachi, Ltd. | Increased intensity optical recording medium with adjacent grooves of different optical depth and a method and apparatus for reproducing the same |
| JPH0645696B2 (en) * | 1988-05-10 | 1994-06-15 | 昭和高分子株式会社 | Curable resin composition |
| JP2764960B2 (en) * | 1988-11-16 | 1998-06-11 | 松下電器産業株式会社 | Recording / playback method |
| JPH02156422A (en) * | 1988-12-09 | 1990-06-15 | Hitachi Ltd | Device for driving optical disk |
| JP2863190B2 (en) * | 1989-03-24 | 1999-03-03 | ソニー株式会社 | Manufacturing method of magnetic disk |
| JP3059026B2 (en) * | 1993-07-15 | 2000-07-04 | 松下電器産業株式会社 | Optical recording medium, recording device and recording method |
| JPH0954985A (en) * | 1995-08-15 | 1997-02-25 | Sony Corp | Optical disk and production of optical disk |
| DE69634850T2 (en) * | 1995-10-09 | 2006-05-18 | Matsushita Electric Industrial Co., Ltd., Kadoma | INFORMATION RECEIVING CARRIER, INFORMATION REPRODUCER AND INFORMATION REPRODUCTION PROCESS |
| JPH09251668A (en) * | 1996-03-15 | 1997-09-22 | Sony Corp | Optical recording medium |
| JPH1125606A (en) * | 1997-07-04 | 1999-01-29 | Toshiba Corp | Optical recording and reproducing disk |
| JP4097801B2 (en) * | 1997-09-26 | 2008-06-11 | 松下電器産業株式会社 | optical disk |
| JP2000357344A (en) * | 1999-06-15 | 2000-12-26 | Ricoh Co Ltd | Optical disk and optical disk recorder |
| DE60042766D1 (en) * | 1999-06-30 | 2009-09-24 | Sharp Kk | An optical disk apparatus for reproducing an optical disk having pits of different depths formed therein |
| JP2000082220A (en) * | 1999-09-30 | 2000-03-21 | Matsushita Electric Ind Co Ltd | Optical recording medium |
| RU2187153C2 (en) * | 2000-10-10 | 2002-08-10 | Общество С Ограниченной Ответственностью "Инсмат Технология" | Method and disk-type data medium for tracking data track of disk-type optical- record medium |
| JP2003030856A (en) * | 2001-07-17 | 2003-01-31 | Pioneer Electronic Corp | Optical disk and recording/reproducing device |
| KR100788646B1 (en) * | 2001-08-09 | 2007-12-26 | 삼성전자주식회사 | An optical disk Burst Cutting Area code recording method |
| JP2004030860A (en) * | 2002-04-30 | 2004-01-29 | Pioneer Electronic Corp | Recording disk and apparatus and method for reproducing recorded information |
| US7649824B2 (en) * | 2002-07-01 | 2010-01-19 | Panasonic Corporation | Optical storage medium control data region |
| KR100716966B1 (en) * | 2002-11-04 | 2007-05-10 | 삼성전자주식회사 | Optical disc having tracking polarity information, apparatus and method for recording and reproducing the same thereon |
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- 2004-05-20 CA CA2515489A patent/CA2515489C/en not_active Expired - Lifetime
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| EP1642270A1 (en) | 2006-04-05 |
| MY165340A (en) | 2018-03-21 |
| RU2005130398A (en) | 2006-01-27 |
| HK1122394A1 (en) | 2009-05-15 |
| HK1122393A1 (en) | 2009-05-15 |
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