CN100385516C - Information storage medium and method and apparatus for recording/ reproducing data on/from the same - Google Patents
Information storage medium and method and apparatus for recording/ reproducing data on/from the same Download PDFInfo
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- CN100385516C CN100385516C CNB2005800003916A CN200580000391A CN100385516C CN 100385516 C CN100385516 C CN 100385516C CN B2005800003916 A CNB2005800003916 A CN B2005800003916A CN 200580000391 A CN200580000391 A CN 200580000391A CN 100385516 C CN100385516 C CN 100385516C
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
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Abstract
An information storage medium on which data is recorded after performing optimum power control (OPC) and a method and apparatus to record/reproduce data on/from the information storage medium, wherein the recordable information storage medium has a plurality of recording layers and a pickup irradiates a beam onto the information storage medium, utilize operations of: recording data on at least a portion of a recording layer through which a test beam to find an optimum recording power passes before performing optimum power control (OPC) on a desired recording layer and performing OPC on the desired recording layer. The method and apparatus allow data to be recorded after performing a test to determine an optimum recording power, thus providing effective recording/reproducing quality.
Description
Technical field
What the present invention relates to is information storage medium and the method and apparatus that this information storage medium carried out data recording reproducing, especially, the present invention relates to after carrying out best power control (OPC), the information storage medium with a plurality of recording layers be carried out the method and apparatus of data recording reproducing.
Background technology
Optical head can carry out non-contacting recording to information storage medium.CD is one type a information storage medium, is divided into compact disk (CD) and digital universal disc (DVD) according to the data recording capacity.Examples of optical disks that can reading and writing information comprises the DVD+RW that can write down CD (CD-R), can rewrite CD (CD-RW) and 4.7GB.In addition, just surpass at present high definition DVD (HD-DVD) or the Blu-ray disc (BD) of 15GB, and can read and be lower than the super-resolution CD of resolution limit by the data of indicia patterns record at the development records capacity.
Though have only individual layer 4.7GB recordable DVD dish commercially to use,, double-deck 8.5GBDVD-ROM dish is sold on market.For the data that are recorded on the 8.5GB DVD-ROM dish are backed up, require the recordable DVD dish to have same capability.So,, wish very much to obtain a kind of technology, but have the identical recording feature of maintenance on the recorded information storage medium of a plurality of recording layers in order to realize to having the demand of the recordable disc of first, second recording layer at least.One of most important recording feature is called best power control (OPC).
Summary of the invention
The invention provides a kind ofly, and utilize method of the present invention to write the information storage medium of data in the above at the method and apparatus that has carried out best power control (OPC) but had recording data on the recorded information storage medium of a plurality of recording layers afterwards.
According to an aspect of the present invention, provide a kind of method of data recording reproducing, but the recorded information storage medium that utilizes optical head to have a plurality of recording layers relatively carries out data recording reproducing.This method be included in carry out on the required recording layer before the OPC data are recorded in recording layer pass through be used for finding out at least one part of test beams of optimal recording power, on required recording layer, carry out OPC then.The described part of described recording layer is corresponding to channel contained in the described test beams.
Represent respectively at SL, TP, NA, n under the situation of refractive index of thickness, the channel separation of the wall between described a plurality of recording layer, the numerical aperture of object lens, described information storage medium, determine channel number with following equation:
According to the distance described optical head from closely coming record data to the order of recording layer far away.
When described a plurality of recording layers comprise first recording layer and second recording layer, and during the more close described optical head in the position of described first recording layer, before carrying out OPC on described second recording layer, data are recorded on the part that described the above test beams of first recording layer passes through.
At least a being recorded on each recording layer in shake, asymmetry, degree of modulation or the reflectivity.
According to another aspect of the present invention, a kind of information storage medium is provided, comprise first recording layer and second recording layer, in described first and second recording layer any one contains Lead-In Area, user data area and leading-out zone, wherein, data are carried out record from described first recording layer to described second recording layer.In this information storage medium, described first and second recording layer comprises the best power control zone respectively, data are recorded in the periphery or the interior week of the best power control zone of described first recording layer, carry out best power control on a zone of the best power control zone of described second recording layer, described zone is arranged to and is recorded data and be used for determining the regional relative of optimal recording power.
According to another embodiment of the present invention, but a kind of recorded information storage medium comprises a plurality of recording layers, wherein store the best power control information, whether this best power control information representative data has write on the recording layer is used for determining that by test beams optimal recording power is with on the part of the enterprising line item of required recording layer.In this case, described recording layer has the best power control zone, and described best power control information comprises whether representative data has write on the interior week in optimal recording power district or the information of periphery.In described a plurality of recording layer each all comprises Lead-In Area, user data area and leading-out zone, and described best power control information is recorded in described Lead-In Area and the described leading-out zone at least one.But described Lead-In Area comprises read-only zones and posting field, but described best power control information is recorded in described posting field.
According to a further aspect in the invention, provide a kind of data recording reproducing equipment, but the recorded information storage medium that comprises a plurality of recording layers is carried out data recording reproducing, described equipment comprises: optical head, with light beam irradiates to described information storage medium; The recording signal processor receives from described information storage medium beam reflected through described optical head, carries out signal Processing; Controller detects data and whether has been recorded in passing through on the recording layer and is used for determining on the part of test beams of optimal recording power, and carry out best power control on required recording layer, to carry out record through described optical head.
In other embodiments, the invention provides a kind of data recording reproducing equipment, but the recorded information storage medium that comprises a plurality of recording layers is carried out data recording reproducing, and described equipment comprises: optical head, with light beam irradiates to described information storage medium; The recording signal processor receives from described information storage medium beam reflected through described optical head, carries out signal Processing; Controller, read so a kind of information, whether this information representative data has been recorded in passing through on the recording layer is used for determining on the part of test beams of optimal recording power, and carries out best power control on required recording layer, carries out record to utilize the described optical head of described information via.
When data were not recorded on the described part of described recording layer, the control optical head was recorded in data on the part of passing through described test beams of described recording layer, determines optimal recording power, with at the enterprising line item of required recording layer.Be recorded in information on the part of passing through test beams of described recording layer at record representative data on the described information storage medium.
Described information storage medium comprises the control information of representing the optimal recording power condition, when data are recorded on the part of passing through test beams of described recording layer, and when data are not recorded on the part of passing through test beams of described recording layer, be suitable for described optimal recording power condition.Be not recorded in when data on the described part of described recording layer, use the optimal recording power condition to replace independent record data and carry out best power control, to find out optimal recording power.
Other aspects of the present invention and/or the description below of advantage part partly propose, and part can become apparent or learn from the practice of the present invention from the following description.
The present invention also provide a kind of on information storage medium the equipment of recording data, on required recording layer, test, find out optimal recording power.
The present invention also provides a kind of information about the required data recording of OPC, to select the record condition of OPC according to the type of driver, therefore can more effectively carry out OPC.
Description of drawings
From below in conjunction with the description of accompanying drawing to embodiment, these and/or other aspect of the present invention and advantage can become clear and be more readily understood.In the accompanying drawings,
Shown in Fig. 1 is the layout of dual-layered information storage medium, and the method for data recording reproducing is carried out in expression to this information storage medium according to one embodiment of the present invention;
Fig. 2 is the synoptic diagram that information storage medium is carried out the equipment of data recording reproducing according to one embodiment of the present invention;
Shown in Fig. 3 is layout according to the information storage medium of one embodiment of the present invention;
Shown in Fig. 4 is another layout according to the information storage medium of one embodiment of the present invention, has write down the information of relevant dish on this information storage medium;
What the layout of Fig. 5 A and Fig. 5 B was represented is according to an embodiment of the invention information storage medium to be tested to determine the method for optimal recording power;
The flowcharting of Fig. 6 A and Fig. 6 B be, to carry out the process of OPC according to one embodiment of the present invention information storage medium is carried out in the method for data recording reproducing.
Embodiment
To at length speak of embodiments of the present invention below.In the accompanying drawing that the example of these embodiments is represented, wherein, identical Reference numeral is from first to last represented identical component part.Below, by the reference accompanying drawing these embodiments are described, to explain the present invention.
According to one embodiment of the present invention, a kind of method of the information storage medium with a plurality of recording layers being carried out data recording reproducing is provided, when finding out optimal recording power, make the data prerecord on the part of another recording layer that light beam passes through with light beam irradiates target record layer.
But the recorded information storage medium carried out best power control (OPC) before record data, to determine optimal recording power.In order to carry out OPC, according to booking situation power data are write on the OPC district, then data are read out, test reappears feature.In case in test process, found optimal recording power, just in each record slot according to the optimal recording power record data.
But when carrying out OPC in the recorded information storage medium with a plurality of recording layers, the recording feature that shows after finishing OPC is along with from a recording layer to another recording layer and difference for example, depends on and write down order or recording power.Because these differences can cause the OPC out of true, so the condition that must detection may cause the recording feature to change along with the state of each recording layer then, has considered that these conditions carry out OPC.
In order to find the condition that influences the recording feature, test, data are write on the information storage medium of Fig. 1.Wherein, information storage medium has by different order, the first recording layer L1 and the second recording layer L2 that the recording power level is different.
The record condition of information storage medium is: linear velocity is 3.8m/s, and optical maser wavelength is 650nm, and numerical aperture of objective (NA) is 0.6.Information storage medium uses the multiple-pulse wrting method.For the first recording layer L1, use 15.1mW recording power, 1.45T Ttop, 0.65T Tmp and-the Tdtp 3T of 0.03T; And for the second recording layer L2, use 20mW recording power, 1.65T Ttop, 0.70T Tmp and-the Tdtp 3T of 0.03T.What Ttop, Tmp, Tdtp represented respectively is the time span that goes up pulse, the time span of each pulse and the time of relative datum skew.Here, the master record condition enactment is recording power and wrting method by only writing data and can carry out the minimum jitter adjustment on required recording layer.1T represents 38.5ns.
What table 1 was represented is under these conditions data to be write on shake, I3/I14 modulation, asymmetry and the reflectivity that the last back of first and second recording layer L1, L2 is measured.Optics is provided with near the first recording layer L1 first watch.Reference numeral 10 is represented object lens.
Table 1
Can find out significantly that from table 1 no matter recording status or order are how, the first recording layer L1 almost keeps identical shake, I3/I14, asymmetry and reflectivity; And showing feature, the second recording layer L2 changes in proper order according to record.That is, when from the first recording layer L1 when the second recording layer L2 writes data in proper order, second recording layer L2 generation marked change aspect shake, asymmetry and reflectivity.When writing data according to opposite order, the second recording layer L2 diminishes in the variation of these characteristic aspect.
Table 2 expression be that 120% and 150% recording power with normal power writes the recording feature that the back is measured with data.In the OPC process, test with different recording power levels, determine optimum recording powers of laser beam.Especially, because in case use the information storage medium of predetermined period can be because surface contamination and recording power that need be higher than normal power, so, must test with higher power.
Table 2
Can find out significantly from table 2, even when recording power was bigger, the first recording layer L1 also showed recording feature much at one.When order writes data on the first recording layer L1 and the second recording layer L2, second recording layer L2 generation marked change aspect reflectivity, asymmetry and shake.With compare with normal power record, shake has increased, and is almost constant but reflectivity and asymmetry keep.
From top table 1 and 2 as can be seen, the first recording layer L1 less is subjected to the influence of record order or recording power, and the second recording layer L2 is subjected to the influence of record order or recording power very big.Especially, when order write data on first and second recording layer L1, L2, marked change had taken place in the second recording layer L2 on the recording feature.This variation is caused by transmissivity, and whether transmissivity can change by the record or the non-recorded part of recording layer according to writing light beam.Low transmissivity has reduced the effect of recording power.
Simultaneously, must under the condition that causes the variation of recording characteristic remarkable, test.That is,, so, just can find optimal recording power accurately if the change of recording feature is all little under any condition, and without any need for the special test that is used for determining optimal recording power.Yet,, so, just need under the condition that causes the variation of recording characteristic remarkable, test, to determine optimal recording power if the recording feature changes with record condition.
So, when sending test beams and find out optimal recording power, in general, at least a portion recording layer that test beams is passed through, write data.
With reference to Fig. 2, information storage medium D comprises the first recording layer L1 and the second recording layer L2, be used for the optical head 50 of record data be positioned at the first recording layer L1 below., with before carrying out OPC on the second recording layer L2 data are recorded on the part that the test beams of the first recording layer L1 passes through at the transmission test light beam.In this case, data can be recorded in and shine in the corresponding district of channel contained in the light beam of the first recording layer L1.
Referring to Fig. 1, channel number contained in the part of the tested light beam irradiates of the first recording layer L1 is provided by equation (1):
Wherein, SL and TP represent the thickness and the channel separation of the wall 15 between first and second recording layer L1, the L2 respectively.
When n is the refractive index of information storage medium, when NA is the numerical aperture of object lens 10, utilize relational expression NA=nsin θ, equation (1) may be summarized to be:
Before the test beams that will be used for OPC shines on the second recording layer L2, can write on data on the last zone of the first recording layer L1 corresponding to the defined channel number of equation (2).
As SLtan θ=41.25 (μ m), during TP=0.74 μ m, the channel number that is contained in the test beams approximately is 112.
Under the situation of DVD-ROM driver, optical head is positioned under first recording layer, and data write to second recording layer from first recording layer.In order to keep consistent with the DVD-ROM driver, but the recorded information storage medium can be designed so that data write to second recording layer from first recording layer.
When optical head is positioned at the top of the second recording layer L2, can use identical data recording reproducing method according to one embodiment of the present invention.In this case, data at first are recorded on the second recording layer L2., before carrying out OPC data are being recorded at least a portion second recording layer L2 that test beams passes through for record on the first recording layer L1.
And this method both can be used for opposite channel path (OTP) dish, also can be used for parallel channel path (PTP) dish.Although the present invention is described with reference to dual-layered information storage medium,, this method also can be used to have the multilayered medium of three or more recording layers.
Simultaneously, in order to obtain optimal recording power, be on each recording layer at least a in shake, degree of modulation, asymmetry and the reflectivity of each recording layer of stylus point.Referring to Fig. 3, comprise Lead-In Area 20, user data area 25 and leading-out zone 30 according to the information storage medium of one embodiment of the present invention.
But Lead-In Area 20 is divided into read-only zones and posting field.Control data section in the read-only zones comprises information and the copy protection information relevant with dish.Can be used for carrying out OPC with any in relevant information of dish and the copy protection information.
Be recorded in the control data section with predetermined bite at least a in shake, degree of modulation, asymmetry or the reflectivity of each recording layer.Especially, but the recorded information storage medium can comprise asymmetry information.When light beam under first recording layer during surface launching, be recorded in data on the part that the light beam of first recording layer passes through after, can be to measuring at the asymmetry of second recording layer.
When the material of information recording carrier or type change, can write down control informations such as asymmetry, degree of modulation, shake together.Control information both can be recorded in Lead-In Area 20, also can be recorded in leading-out zone 30, perhaps was recorded on Lead-In Area 20 and the leading-out zone 30.
As another kind of mode,, can be recorded on the different spaces in the control data section about the asymmetry information of each first and second recording layer referring to Fig. 4.In this case, about the asymmetry information of first recording layer with represent level number, i.e. first recording layer, information record together, and about the asymmetry information of second recording layer and the information of representing second recording layer record together.The information relevant with dish can be recorded on first and second recording layer by same way as.
With reference to Fig. 5 A, first and second recording layer L0, L1 comprise the L0-23 and the L1-23 in first and second OPC district respectively.On the regional 21b of the first recording layer L0, carry out OPC, on the regional 22a of the second recording layer L1, carry out OPC.Zone 21b is not arranged to relative with regional 22a.When light beam during through the first recording layer L0 incident, be to carry out before the OPC on the second recording layer L1, the data prerecord is on the regional 21a that is positioned under the regional 22a.
The regional 21b of OPC is carried out in the position of the regional 22b of the second recording layer L1 with respect to the first recording layer L0.Zone 22b can divide and is used in the reserved area.On the second recording layer L1, carry out the regional 21a of the light beam of OPC by the first recording layer L0.For record on regional 21a, can in the process of manufacturing dish, carry out prerecord technology, perhaps by predefined mode data are being recorded on the presumptive area of the first recording layer L0 before the user data.
Referring to Fig. 5 B, first and second recording layer L0, L1 comprise first and second OPC district L0-23 and L1-23 respectively.On zone 21 ' a of the first recording layer L0, carry out OPC, on zone 22 ' b of the second recording layer L1, carry out OPC.Zone 21 ' a is positioned at the week of an OPC district L0-23, and zone 22 ' b is positioned at the periphery of the 2nd OPC district L1-23.
When light beam during through the first recording layer L0 incident, be to carry out before the OPC on the second recording layer L1, the data prerecord is on the zone 21 ' b that is positioned under the 22 ' b of zone.
Zone 21 ' a of OPC is carried out in the position of zone 22 ' a of the second recording layer L1 with respect to the first recording layer L0.Zone 22 ' a can be the reserved area.Identical recording mechanism can be used for the periphery and the interior week of information storage medium.
Referring to Fig. 6 A, at each recording layer in the information storage medium with a plurality of recording layers, the method for carrying out OPC comprises: when injecting information storage medium in the driver, upwards carry out OPC at recording layer from nethermost recording layer; Before carrying out OPC on the last recording layer that covers, record the user data in the same recording layer that carries out OPC.In this case, behind first recording layer record, on second recording layer, carry out OPC.But, because this method allows user data to continue input in the process of carrying out OPC at second recording layer, so, need storer or buffer to come storing predetermined quantity data, up to finishing OPC.
Referring to Fig. 6 B, the another kind of method of carrying out OPC at each recording layer comprises: when injecting information storage medium in the driver, sequentially carry out OPC on each recording layer, sequentially data are recorded on each recording layer then.This method does not need storer or buffer, and therefore, its advantage is a continuously record data interruptedly not.
Referring to Fig. 2, the equipment (disk drive) that information storage medium D carries out data recording reproducing is comprised optical head 50, recording signal processor 60 and controller 70 according to embodiment of the present invention.More particularly, the collimation lens 52 that optical head 50 comprises the laser diode 51 of launching light beam, beam collimation that laser diode 51 is sent is parallel beam, change the beam splitter 54 of incident beam travel path and will focus on object lens 56 on the information storage medium D by the light beam of beam splitter 54.
Be subjected to the reflection of beam splitter 54 by information storage medium D beam reflected, incide photodetector 57 (for example four fens photodetectors) then.The light beam that is received by photodetector 57 is converted to electric signal by operating circuit 58, exports as RF or with signal through channel C h1, and h2 exports as push-pull signal through the differential wave channel C.
Before data being recorded in the information storage medium D with first and second recording layer L1, L2, controller 70 is tested on the test section of information storage medium D, determines optimal recording power.In order to realize this function, after on data being recorded in the first recording layer L1, in opc test process at the second recording layer L2, whether controller 70 detection data have been written on the part of the last tested light beam irradiates of the first recording layer L1, and control optical head 50 is recorded in data at least a portion that light beam passes through on the first recording layer L1 before testing then.
In the opc test process, controller 70 also reads control informations such as reflectivity, shake, degree of modulation or asymmetry through optical head 50, utilizes these control informations to determine optimal recording power then.Then, it is the normal power that obtains the test process that controller 70 makes the writing light beam of launching from optical head 50, like this, can use this writing light beam that data are recorded on the information storage medium D.
In order to reappear the data of such record, by object lens 56 and beam splitter 54, be incident on then on the photodetector 57 from information storage medium D beam reflected.The light beam that is input to photodetector 57 is then converted to electric signal by operating circuit 58, exports as the RF signal.
The driver of another embodiment can comprise the OPC information on the information storage medium according to the present invention.For example, OPC information can comprise such information, promptly whether is recorded in the influence to OPC that causes on the part that light beam passes through on the information storage medium about data in the OPC process.Driver with such information no longer needs the data prerecord in district that light beam on the information storage medium passes through in the OPC process.
That is to say that according to present embodiment, the driver with this OPC information does not require and data is being recorded on the adjacent recording layer of information storage medium before the OPC.For OPC, data are recorded on the information storage medium, even in driver, also can increase the data recording time, and because the record of data has reduced the OPC district with OPC information.
Like this, the driver that has OPC information by utilization provides predetermined information, needn't data be recorded on the adjacent recording layer for OPC.Therefore, by using this predetermined information, this driver can use the OPC information of embedding accurately, promptly to carry out OPC, even data do not write on the part that the light beam that is used for OPC passes through.
For example, a kind of driver has a kind of OPC information, and whether this OPC information representative data has been recorded in the influence to OPC that causes on the part that the light beam that is used for OPC passes through.If this driver is driver A, establishing the driver that does not have this information is driver B, and the district that establishes by the light beam irradiates that is used for OPC is district Y.
For data are recorded on the information storage medium, driver A read before carrying out OPC and coils relevant information.In this case, when the expression data have write on information on the district Y of the light beam process that is used for OPC and have not been recorded on the information storage medium, driver A utilizes the OPC information of its embedding to carry out OPC, do not need independent data are recorded on the district Y, therefore saved the time of spending data being recorded on the district Y.In contrast, when the expression data had write on the fate that the information of district on the Y is recorded in information storage medium, driver A carried out OPC.The recording power that carries out OPC will consider that the data that write on the district Y adjust.
For data are recorded on the information storage medium, but driver B read before carrying out OPC and coils relevant information and write on information on the posting field.In this case, when the expression data had write on the information of district on the Y and are not recorded on the information storage medium, driver B at first was recorded in data before carrying out OPC on the district Y of information storage medium.When carrying out OPC, driver B OPC light beam irradiates district Y, but then representative data has been write on the posting field (for example information section) that the information of distinguishing on the Y is recorded in Lead-In Area or leading-out zone.
For example, in order to carry out OPC on second recording layer, whether representative data has write on information on the district Y of first recording layer, and can to use byte X to write down on the information section as follows:
Byte X:00000000 (00h)--〉there is not a record
00000001 (01h)--〉record
Meanwhile, interior week or the information on the periphery that whether has write on OPC district L0-23 and L1-23 about the OPC data shown in Fig. 5 A and 5B can use the X byte records as follows:
Byte X:00000000 (00h)--〉be not recorded in internal and external circumferential
00000001 (01h)--〉be not recorded in interior week, be recorded in periphery
00010000 (10h)--〉be recorded in interior week, be not recorded in periphery
00010001 (11h)--〉be recorded in internal and external circumferential
As mentioned above, preceding 4 representatives of a byte are about the information in interior week, and back 4 representatives are about the information of periphery.As another kind of scheme, every kind of information can be with two byte records.
Specifically, information storage medium comprises first and second recording layer L0 and L1, and data are carried out record from the first recording layer L0 to the second recording layer L1.Optical head can be positioned at the below of the first recording layer L0.Driver can use about data whether write on information in the district of the test beams process that is used for OPC individually in the process of carrying out OPC, to carry out record at the second recording layer L1.Do not write this district if be used for the information of OPC, so, driver can use the OPC information of its embedding to carry out OPC, and needn't write down the OPC data separately.
Multilayer information memory medium for having three or a plurality of recording layers can use identical method.In this case, when carrying out the recording layer of OPC with the test beams irradiation, whether write on information in the district that test beams passes through at record representative data on the presumptive area of information storage medium, used this information on these a plurality of recording layers, to carry out OPC then.
Here, the opc test section can be located at user data area district in addition.Although expressing Lead-In Area 20, Fig. 3 and Fig. 4 contain test section,, the position of test section can separate with Lead-In Area and leading-out zone.
Meanwhile, when representing data to write on the fate that the information of district on the Y is recorded in information storage medium, driver B carries out OPC.Carry out the recording power of OPC and will consider that having write on the data of distinguishing on the Y adjusts.
Driver control optical head 50 according to one embodiment of the present invention reads the information that whether has write about data at OPC, carries out OPC according to the special mode of this driver then.
Contain representative data according to the information storage medium of one embodiment of the present invention and whether be recorded in the district that the light beam that is used for OPC passes through, so can whether write down independent data according to the type selecting of driver for OPC.The driver that contains OPC information need not to write down independent data just can carry out OPC, therefore, has reduced writing time, has increased the utilization ratio in OPC district.
According to one embodiment of the present invention information storage medium is carried out the method for data recording reproducing, can determine best read-out power, but the recorded information storage medium with a plurality of recording layers is carried out data recording reproducing.This method need be tested, and finds the optimal recording power that is used to write down, and therefore realizes effective recording feature.The present invention make data according to the distance optical head from closely carrying out recording to the order of recording layer far away, therefore, but provide a kind of recorded information storage medium, can realize consistent with DVD-ROM.
The present invention also provides a kind of equipment, carries out data recording reproducing at information storage medium, tests on required recording layer, to find out optimal recording power.
The present invention also provides the information about record OPC desired data, to select to be used for the record condition of OPC according to type of driver, therefore, can carry out more effective OPC.
Although expression and described several embodiments of the present invention,, those skilled in the art can understand, can make amendment to these embodiments, and can not exceed principle of the present invention and spirit.Scope of the present invention is limited by claim and equivalent thereof.
Claims (27)
1. the method for a data recording reproducing, but the recorded information storage medium that utilizes optical head to have a plurality of recording layers relatively carries out data recording reproducing, and this method comprises:
Data are recorded at least one part that the test beams that is used for finding out optimal recording power on the recording layer passes through,
The record representative data has write on the information on the part that the above test beams of described recording layer passes through,
Carry out best power control on the recording layer covering on the described recording layer.
The method of claim 1, wherein the part passed through of the test beams of described recording layer corresponding to channel contained in the described test beams,
Wherein, SL, TP, NA, n represent the thickness, channel separation, the numerical aperture of object lens, the refractive index of described information storage medium of each recording layer in described a plurality of recording layer and the wall between the next record layer respectively.
The method of claim 1, wherein according to the distance described optical head from closely coming record data to the order of recording layer far away.
4. the method for claim 1, wherein data are recorded in the position on the recording layer of close described optical head after, data are recorded in cover recording layer before, cover on described and carry out best power control on the recording layer.
5. the method for claim 1, wherein before recording the user data on the described information storage medium, on described a plurality of recording layers, carry out best power control.
6. the method for claim 1, wherein, when described a plurality of recording layers comprise first recording layer and second recording layer, and the position of described first recording layer is during than the more close described optical head of described second recording layer, before carrying out best power control on described second recording layer, data are recorded on the part that described the above test beams of first recording layer passes through.
7. the method for claim 1, wherein in the Lead-In Area of described information storage medium and at least one district in the leading-out zone, write down the control information of carrying out best power control.
8. method as claimed in claim 7, wherein, described control information comprises at least a in shake, asymmetry, degree of modulation or the reflectivity.
9. method as claimed in claim 8, wherein, be recorded in data on the part that the above test beams of described recording layer passes through after, described control information is measured.
10. one kind is distributed the method for distinguishing on the information storage medium that comprises first recording layer and second recording layer, in described first and second recording layer any one contains Lead-In Area, user data area and leading-out zone, wherein, data are carried out record from described first recording layer to described second recording layer, and this method comprises:
On described first and second recording layer, distribute the best power control zone respectively,
Periphery or interior week in the best power control zone of first recording layer are distributed a district, and data are recorded in this district so that definite optimal recording power,
The position branch relative with the described district that is used for determining optimal recording power on the best power control zone of second recording layer is used in the district that carries out best power control,
Wherein, the information in the described district that is used for determining optimal recording power that records on this information storage medium whether representative data be recorded in first recording layer.
11. method as claimed in claim 10, wherein, the position of described best power control zone separates with described Lead-In Area and leading-out zone.
12. but method at the recorded information storage medium identifying recording layer that comprises a plurality of recording layers, comprise: but record best power control information on described recorded information storage medium, whether this best power control information representative data has write on the part that test beams is passed through on the recording layer, and described test beams is used for determining that optimal recording power is to cover the enterprising line item of recording layer on described recording layer.
13. method as claimed in claim 12, wherein, described recording layer has the best power control zone, and described best power control information comprises whether representative data has write on the interior week of the best power control zone that described test beams passes through or the information of periphery.
14. as claim 12 or 13 described methods, wherein, each in described a plurality of recording layers all comprises Lead-In Area, user data area and leading-out zone, described best power control information is recorded in described Lead-In Area and the described leading-out zone at least one.
15. method as claimed in claim 14, wherein, but described Lead-In Area comprises read-only zones and posting field, but described best power control information is recorded in described posting field.
16. a data recording reproducing equipment, but the recorded information storage medium that comprises a plurality of recording layers is carried out data recording reproducing, and described equipment comprises:
Optical head, with light beam irradiates to described information storage medium;
The recording signal processor receives from described information storage medium beam reflected through described optical head, carries out signal Processing;
Controller, read so a kind of information, whether this information representative data has been recorded in passing through on the recording layer is used for determining on the part of test beams of optimal recording power, and utilize described information to carry out best power control on the recording layer covering on the described recording layer, to carry out record through described optical head.
17. equipment as claimed in claim 16, wherein, when data are not recorded on the part that the test beams of described recording layer passes through, the control optical head is recorded in data on the part of passing through described test beams of described recording layer, determine optimal recording power, on described recording layer, to cover the enterprising line item of recording layer.
18., wherein, be recorded in information on the part of passing through test beams of described recording layer at record representative data on the described information storage medium as claim 16 or 17 described equipment.
19. as claim 16 or 17 described equipment, wherein, described information storage medium comprises the information about the optimal recording power condition, when data are recorded on the part of passing through test beams of described recording layer, and when data are not recorded on the part of passing through test beams of described recording layer, be suitable for described optimal recording power condition.
20. equipment as claimed in claim 19 wherein, when data are not recorded on the part that the test beams of described recording layer passes through, use the optimal recording power condition to replace independent record data and carries out best power control, to find out optimal recording power.
21. a method of carrying out best power control is carried out best power control at each recording layer of the information storage medium with a plurality of recording layers, this method comprises:
Read control information;
Carry out best power control on first recording layer in described a plurality of recording layers;
User data on described first recording layer;
That reads whether representative data be recorded in first recording layer is used for determining information on the part that the test beams of optimal recording power of second recording layer passes through;
In the input user data, carry out best power control on second recording layer on be positioned at described first recording layer, wherein, the storage of subscriber data of carrying out importing in the best power control on described second recording layer is in storer or buffer, up to the best power control of having finished on described second recording layer;
Described user data is recorded on described second recording layer.
22. method as claimed in claim 21, also comprise: carrying out best power control on described first recording layer, on described second recording layer, carrying out in the process of best power control, reading and comprise control information at least a in reflectivity, shake, degree of modulation or the asymmetry.
23. a method of carrying out best power control is carried out best power control at each recording layer of the information storage medium with a plurality of recording layers, this method comprises:
When described information storage medium inserts in the driver, on each recording layer, carry out best power control according to priority;
Record data according to priority on each recording layer,
Wherein, the step of carrying out best power control on each recording layer comprises:
That reads whether representative data be recorded in recording layer is used for determining information on the part that the test beams of optimal recording power passes through.
24. method as claimed in claim 23 also comprises: on each recording layer, carry out in the process of best power control, read and comprise control information at least a in reflectivity, shake, degree of modulation or the asymmetry.
25. a data recording reproducing equipment, but the recorded information storage medium that comprises a plurality of recording layers is carried out data recording reproducing, and described equipment comprises:
Optical head, with light beam irradiates to described information storage medium;
Best power control controller when light beam irradiates is to described information storage medium, upwards carries out best power control at recording layer from nethermost recording layer;
Storer or buffer;
The recording signal processor carries out recording to the user data on the recording layer that carries out best power control in described storer or the buffer,
Wherein, what next described best power control controller read whether representative data be recorded in recording layer is used for covering on determining information on the part that the test beams of the optimal recording power of recording layer passes through, carry out best power control on the recording layer last covering, and be recorded in the user data of importing in the best power control procedure of covering recording layer, described storer or buffer be used for covering on described best power control on the recording layer finish before storaging user data.
26. a data recording reproducing equipment, but the recorded information storage medium that comprises a plurality of recording layers is carried out data recording reproducing, and described equipment comprises:
Optical head, with light beam irradiates to described information storage medium;
Best power control controller when light beam irradiates is to described information storage medium, carries out best power control in order on each recording layer;
The recording signal processor carries out recording in order to the data on each recording layer,
Wherein, what best power control controller read whether representative data be recorded in recording layer is used for determining information on the part that the test beams of optimal recording power passes through, so that carry out best power control.
27. disk drive, store predetermined best power control information above with respect to information storage medium, before carrying out best power control, will the data prerecord in the district of the test beams by being used for determining optimal recording power in the best power control procedure of described information storage medium
Wherein, whether this best power control information representative data has write on the part that the test beams that is used for determining optimal recording power on the recording layer is passed through.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020040014378 | 2004-03-03 | ||
| KR20040014378 | 2004-03-03 | ||
| KR1020040027575 | 2004-04-21 | ||
| KR1020040043333 | 2004-06-12 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020136122A1 (en) * | 2001-03-21 | 2002-09-26 | Kazuhiko Nakano | Optical information record medium, method of recording information on optical information record medium, and information recording apparatus |
| US20030137909A1 (en) * | 2002-01-22 | 2003-07-24 | Motoshi Ito | Multi-layered information recording medium, recording apparatus , and recording method |
| CN1447968A (en) * | 2000-09-13 | 2003-10-08 | 松下电器产业株式会社 | Optical information recording medium and optical information recording method, optical information recording device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1447968A (en) * | 2000-09-13 | 2003-10-08 | 松下电器产业株式会社 | Optical information recording medium and optical information recording method, optical information recording device |
| US20020136122A1 (en) * | 2001-03-21 | 2002-09-26 | Kazuhiko Nakano | Optical information record medium, method of recording information on optical information record medium, and information recording apparatus |
| US20030137909A1 (en) * | 2002-01-22 | 2003-07-24 | Motoshi Ito | Multi-layered information recording medium, recording apparatus , and recording method |
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