CN1547196A - Method for regulating 2T writing policy, CD player and correction system thereof - Google Patents
Method for regulating 2T writing policy, CD player and correction system thereof Download PDFInfo
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Abstract
The invention refers to a method, optical disk machine and the correcting system for adjusting the 2T writing tactics. The method includes: the optical disk machine is driven to form a test odd record label and a test even record label on a disc, detects the signal waveform corresponding to the two labels, several writing time periods of the even record label are generated according to the signal waveform amendment of the test even record label, several time periods amended according to the test odd waveform label but not according to the even record, in order to generate several time periods for generating an odd record label.
Description
Technical field
The present invention relates to a kind of cd-recorder and method and the corrective system of setting its write-in policy, particularly a kind ofly can adjust method, rewritable formula CD player and the corrective system of 2T write-in policy to produce best burning quality.
Background technology
In recent years along with the Computing ability is more and more powerful, the development that adds network technique is constantly progressive, make the user heighten to the demand of data storage capacity, therefore various store tools also becomes popular product thereupon, for example utilize CD as storing media, because CD is honest and clean at the bottom of unit price under the same storage volume, not and frivolous not the taking up space of volume and being easy to carry, all very attracted attention all the time, especially over the years the function of various cd-recorder is become stronger day by day, read quality and storage speed and constantly upwards promote, the standard that makes cd-recorder almost become every personal computer is equipped with.For instance, because rewritable formula CD player (CD-RW drive) can write data in a rewritable formula CD (CD-RW disk) and this rewritable formula CD recorded data of erasing, therefore make the user to utilize CD to come storage data more expediently.
Generally speaking, one cd-recorder is when storing data to a CD, meeting utilize these data one scrambler (encoder) of this cd-recorder to be converted to the saving format of this CD earlier, in present known technology, above-mentioned conversion is generally one eight to 14 bit modulation (Eight-to-FourteenModulation, EFM), that is eight to 14 bit modulation be to represent with the square wave of different time length with desiring to be stored in this optical disc data, the conversion after eight to 14 bit modulation data (EFM data) then be burned onto this CD by this cd-recorder.For rewritable formula CD, its recording layer (recording layer) is to form for a phase transformation (phase-change) material, the optical pick-up unit of rewritable formula CD player (optical pick-up unit, OPU) output laser (laser beam) is beaten on a rewritable formula CD precalculated position to order about phase transformation material correspondence one amorphous state (amorphous state) or a monocrystalline state (crystalline state) in this precalculated position, and because monocrystalline state and amorphous state difference corresponding different refractive index (refractive index), so can be distinguished via optical mode.
For rewritable formula CD player, its optical pick-up unit mainly provides a reference power (P
Bias), the power (P that erases
Erase), and a Writing power (P
Write), wherein this Writing power is greater than this power of erasing, and this power of erasing is greater than this reference power.When rewritable formula CD player is carried out a data erase operation for use, the optical pick-up unit of rewritable formula CD player can be exported this power of erasing and heat rewritable formula CD, so that the equal corresponding monocrystalline state of the phase transformation material of corresponding heating location and reach the purpose of the data of erasing.When rewritable formula CD player is carried out a data write operation, if it desires to make the corresponding amorphous state in precalculated position on the rewritable formula CD, then the optical pick-up unit of rewritable formula CD player can be exported Writing power earlier with heating rewritable formula CD, export the result that this reference power reaches cooling then, so this precalculated position gets final product corresponding one first logical value (for example " 1 "), on the contrary, power heats this precalculated position if this optical pick-up unit output is erased, and then the precalculated position can form monocrystalline state and be used for corresponding one second logical value (for example " 0 ").
See also Fig. 1, Fig. 1 is the functional block diagram of known rewritable formula CD player (CD-RW drive) 10.Rewritable formula CD player 10 includes an optical pick-up unit (optical pick-upunit, OPU) 12, one power control units (power control unit), 14, one controllers (controller) 16, an and storer 18.Optical pick-up unit 12 can be exported the laser of different capacity to CD according to different driving voltages, optical pick-up unit 12 exportable reference power Pb for example, the one power P e that erases, an and th writing power P w, power control unit 14 then is the output power that is used for controlling optical pick-up unit 12, for instance, when desiring to carry out the data erase operation for use, power control unit 14 exportable one suitable driving voltages to optical pick-up unit 12 to control its output power P e that erases.16 of controllers are the overall operations that firmware (firmware) 20 stored in the execute store 18 is controlled rewritable formula CD player 10, for example when carrying out data write operation, controller 16 outputs control signals to power control unit 14, so that driving power control module 14 produces suitable driving voltage to optical pick-up unit 12.In practical application, rewritable formula CD player 10 is to utilize a write-in policy (write strategy) to control the power output state of optical pick-up unit 12 so that correctly the pairing record marks of eight to 14 bit modulation data (mark) are write on the rewritable formula CD, that is optical pick-up unit 12 is to switch ground output th writing power P w and reference power Pb, stores a predetermined logic values so that form the record mark (corresponding amorphous state) of length-specific on this rewritable formula CD.
Known as industry, for the data write operation of low power speed, for example store eight to 14 bit modulation data with 16X (the X representative is speed doubly), then normally adopt 1T write-in policy (1T writestrategy), that is to say, in time one-period (1T) of in eight to 14 bit modulation clock signals (EFM clock), optical pick-up unit 12 can output write-once power P w.Yet, along with the burning development of technology, rewritable formula CD player 10 (for example rewritable formula CD player of 32 times of speed or 48 times of speed) can be at faster speed with data burning to rewritable formula CD, in other words, when carrying out the processing of eight to 14 bit modulation, the frequency of eight to 14 required bit modulation clock signals also increases thereupon, makes that the Cycle Length of these eight to 14 bit modulation clock signals is more and more short.Under this situation, after optical pick-up unit 12 is being exported th writing power P w, the time of its output reference power P b in time one-period (1T) is just obviously not enough, therefore the phase transformation material just can't successfully be cooled off and write down desired logical value, so high speed burning meeting causes the output time of reference power too short and make deficiency cool time, produces the problem of wrong storage data at last.
In order to solve the problem of an above-mentioned 1T write-in policy, known technology proposes a kind of 2T write-in policy (2T write strategy) in addition, see also Fig. 2 and Fig. 3, Fig. 2 is the synoptic diagram that known 2T write-in policy forms an even record mark, and Fig. 3 is the synoptic diagram that known 2T write-in policy forms a strange record mark.Known as industry, eight to 14 bit modulation data are to be converted to the record mark of different length and to be stored on the rewritable formula CD, and according to specification (Orange Book Part III, Volume 3), when carrying out the 2T write-in policy, include even record mark (even mark) and strange record mark (odd mark) in the record mark of different length, wherein even record mark is corresponding 2T record mark, the 4T record mark, the 6T record mark, 8T record mark and 10T record mark, the strange then corresponding 3T record mark of record mark, the 5T record mark, the 7T record mark, 9T record mark, and 11T record mark.When controller 16 startup 2T write-in policies come to form the 10T record mark on a rewritable formula CD, at first, controller 16 driving power control modules 14 are set optical pick-up unit 12 and are exported the power P e that erases, as shown in Figure 2, controller 16 driving power control module 14 when time t is set optical pick-up unit 12 and is write lasting output th writing power P w among the period Tmn one, then, controller 16 driving power control modules 14 are set optical pick-up unit 12 output reference power P b.Significantly, optical pick-up unit 12 output th writing power P w heat the phase transformation material of rewritable formula CD, and when optical pick-up unit 12 output reference power P b, the phase transformation material of rewritable formula CD can be cooled off thereupon, as shown in Figure 2, in the time of every 2T, optical pick-up unit 12 all can continue output th writing power P w in writing period Tmn, at last, optical pick-up unit 12 is finished the operation of output th writing power P w in time 8T～10T after, controller 16 driving power control modules 14 are set optical pick-up unit 12 at a cooling period T
C1Output reference power P b, then, controller 16 driving power control module 14 is again set the purpose that optical pick-up unit 12 outputs are erased power P e and finished formation 10T record mark.For other even record marks, it forms with the 10T record mark similar, is example with the 4T record mark, and when optical pick-up unit 12 was finished the output of twice th writing power P w in time 0～4T after, optical pick-up unit 12 can be then at cooling period T
C1Output reference power P b, then, optical pick-up unit 12 is exported the purpose of erasing power P e and finishing formation 4T record mark again.
When controller 16 startup 2T write-in policies come to form the 11T record mark on a rewritable formula CD, at first, controller 16 driving power control modules 14 are set optical pick-up unit 12 and are exported the power P e that erases, as shown in Figure 3, controller 16 driving power control module 14 when time t is set optical pick-up unit 12 and is being write lasting output th writing power P w among the period Tmn, then, controller 16 driving power control modules 14 are set optical pick-up unit 12 output reference power P b, significantly, optical pick-up unit 12 output th writing power P w heat the phase transformation material of rewritable formula CD, and when optical pick-up unit 12 output reference power P b, the phase transformation material of rewritable formula CD can be cooled off thereupon, as shown in Figure 3, except the time of last 3T, in the time of every 2T, optical pick-up unit 12 all can continue output th writing power P w in writing period Tmn.Finish the operation of output th writing power P w in time 6T～8T when optical pick-up unit 12 after, controller 16 is set optical pick-up unit 12 at a heating period Tmn at time t ' driving power control module 14
+In continue output th writing power P w, then, controller 16 driving power control modules 14 are set optical pick-up unit 12 at a cooling period T
C2Output reference power P b, last, controller 16 driving power control module 14 is again set the purpose that optical pick-up unit 12 outputs are erased power P e and finished formation 11T record mark.For other strange record marks, it forms with the 11T record mark similar, with the 5T record mark is example, when optical pick-up unit 12 is finished the output of write-once power P w in time 0～2T after, optical pick-up unit 12 can then be exported write-once power P w again in the time of follow-up 3T, optical pick-up unit 12 is at cooling period T then
C2Output reference power P b, last, optical pick-up unit 12 is exported the purpose of erasing power P e and finishing formation 5T record mark again.
As mentioned above, the 2T write-in policy mainly is to heat rewritable formula CD once with th writing power P w in the time of 2T, therefore when carrying out data write operation with high power speed, the interval time of the heating period of two th writing power P w, just enough phase transformation materials were finished cooling with corresponding amorphous state.For strange record mark and even record mark, its heating period Tmn is corresponding same numerical value, therefore as heating period Tmn, Tmn
+Setting can make phase transformation material corresponding equably amorphous state in one first predetermined length (strange record mark), yet, the setting of same heating period Tmn but possibly can't make phase transformation material corresponding equably amorphous state in one second predetermined length (even record mark), in other words, when optical pick-up unit 12 reads the record mark that is write down on the rewritable formula CD, if high frequency (RF) signal of corresponding strange record mark has preferable waveform, then the waveform of the high-frequency signal of corresponding even record mark is often not good.Similarly, for writing of even record mark, if the setting of heating period Tmn can make phase transformation material corresponding equably amorphous state in one first predetermined length, yet, for writing of strange record mark, same heating period Tmn and adjustable heating period Tmn
+But possibly can't make phase transformation material corresponding equably amorphous state in one second predetermined length, in other words, when optical pick-up unit 12 reads the record mark that is write down on the rewritable formula CD, the high-frequency signal of corresponding even record mark has preferable waveform, and the waveform of the high-frequency signal of corresponding strange record mark is then not good.
Comprehensively above-mentioned, the known heating period Tmn of strange record mark is corresponding same numerical value with the known heating period Tmn of even record mark, but strange record mark still has the unexistent Tmn+ of even record mark.Therefore, yet can make strange record mark produce the heating period Tmn that well writes quality not necessarily can be used to make even record mark generation well to write quality, similarly, the heating period Tmn that can make even record mark generation well write quality not necessarily can be used to make strange record mark to produce and well writes quality, so rewritable formula CD player 10 is if come burning data then to be difficult for making the simultaneously equal corresponding good burning quality of strange record mark and even record mark according to known 2T write-in policy.
Summary of the invention
The invention provides a kind of 2T of adjustment write-in policy to promote the method and the rewritable formula CD player of burning quality, to address the above problem.
The present invention discloses a kind of method of adjusting the 2T write-in policy (2T write strategy) of CD player, and it includes: (a) form a strange record mark of test and the even record mark of a test at a CD; (b) detect testing strange record mark and this tests the signal waveform of even record mark; (c), then a plurality ofly write the period according to what this first residual quantity correction produced an even record mark if this tests corresponding one first residual quantity with the sequential of the maximum signal of one first ideal waveform of sequential of maximum signal of the signal waveform of even record mark; And,, then a plurality ofly write the period according to what this second residual quantity was proofreaied and correct generation one strange record mark if this tests corresponding one second residual quantity with the sequential of the maximum signal of a secondary ideal waveform of sequential of maximum signal of the signal waveform of strange record mark.
The present invention discloses a kind of CD player in addition, it includes: an optical pick-up unit (opticalpick-up unit, OPU), be used for exporting a laser to produce a plurality of strange record marks (odd mark) and a plurality of even record mark (even mark) in a CD etching; An and control module (controller), be electrically connected on this optical pick-up unit, be used for driving this optical pick-up unit according to a 2T write-in policy (2Twrite strategy), this optical pick-up unit of this control module may command uses corresponding at least three time spans a plurality ofly writes the period and exports this laser to form a strange record mark and an even record mark on this CD.Certainly, CD player (for example being a hypervelocity rewritable formula CD player) can also comprise a detecting unit (detector) again.At this, detecting unit is to be electrically connected on control module, and in order to read these strange record marks and these even record mark gained information according to optical pick-up unit, how the notice control module revises these writes the period.At this, detecting unit can be according to a predefined database, and according to the difference of actual burn result with the most desirable burning result, how the notice control module revises these writes the period; Detecting unit also can be according to the profile of these strange record marks and these even record marks and the analysis of distribution, notifies control module how to revise these and writes the period.
The present invention also discloses a kind of CD player corrective system, includes: detecting unit, in order to analyze other profile and the distribution of different recording mark on the CD; And adjustment unit, be electrically connected on a detecting unit and an optical pick-up unit (or say be electrically connected on a CD player), in order to analyze the information that obtains according to detecting unit, change employed a plurality of periods that write of optical pick-up unit (or CD player writes the part of period in order to control), write the period these these and be correspondence at least three time spans and by optical pick-up unit in order to according to exporting a laser to form a strange record mark and an even record mark on CD.
Because 2T write-in policy of the present invention is when burning idol record mark and strange record mark, the idol record mark write writing period length and all can setting independently of period length and strange record mark, so just can make even record mark and strange record mark all have good burning quality via the suitable setting that writes the period.
The accompanying drawing summary
Fig. 1 is the functional block diagram of known rewritable formula CD player.
Fig. 2 forms the synoptic diagram of an even record mark for known 2T write-in policy.
Fig. 3 is the synoptic diagram that known 2T write-in policy forms a strange record mark.
Fig. 4 adjusts the operational flowchart of the method for 2T write-in policy for the present invention.
Fig. 5 is the synoptic diagram of the signal intensity profile characteristic of record mark.
Fig. 6 sets the synoptic diagram of the 2T write-in policy of an even record mark for the inventive method.
Fig. 7 sets the synoptic diagram of the 2T write-in policy of an even record mark for the inventive method.
Fig. 8 is the synoptic diagram of rewritable formula CD player of the present invention.
Fig. 9 is the synoptic diagram of CD player corrective system of the present invention.
The reference numeral explanation
10,30 rewritable formula CDs, 12,32,44 optical pick-up units
14,34 power control units, 16 controllers
18 storeies, 20 firmwares
22,24,26 family curves, 36 detecting units
40 CD player corrective systems, 46 adjustment units
Embodiment
See also Fig. 4, Fig. 4 adjusts the operational flowchart of the method for 2T write-in policy for the present invention.The method that the present invention adjusts the 2T write-in policy includes the following step:
Step 100: beginning;
Step 102: on a CD, write a plurality of strange record marks and a plurality of even record mark according to a 2T write-in policy;
Step 104: read these a plurality of strange record marks and this a plurality of even record marks to detect corresponding signal intensity profile characteristic;
Does step 106: the sequential that an even record mark produces maximum signal depart from a desirable sequential? if then execution in step 108, otherwise, execution in step 110;
Step 108: use at least two various durations to adjust the 2T write-in policy with the sequential of reduction maximum signal and the side-play amount between the desirable sequential;
Does step 110: the sequential that a strange record record produces maximum signal depart from a desirable sequential? if then execution in step 112, otherwise, execution in step 114;
Step 112: use at least three various durations to adjust the 2T write-in policy with the sequential of reduction maximum signal and the side-play amount between the desirable sequential;
Step 114: finish.
Certainly, the present invention not necessarily will handle even record mark earlier and handle strange record mark again, and the present invention also can handle strange record mark earlier and handle even record mark again.That is, also can be first execution in step 110 and step 112, and then treatment step 106 and step 108.Certainly, so-called even record mark can comprise record marks such as 2T, 4T, 6T, 8T and 10T, and as long as wherein there is the sequential of some record marks to depart from corresponding desirable sequential, just represents even record mark to depart from the reason sequential.Relatively, so-called strange record mark can comprise record marks such as 3T, 5T, 7T, 9T and 11T, and as long as wherein there is the sequential of some record marks to depart from corresponding desirable sequential, just represents strange record mark to depart from the reason sequential.
The method that the present invention adjusts the 2T write-in policy is to be applied to rewritable formula CD player 10 shown in Figure 1, a hypervelocity rewritable formula CD player (ultra-speed CD-RW drive) for example, because the function of rewritable formula CD player 10 has described in detail as above with operation, therefore no longer repeats to give unnecessary details at this.The present invention adjusts the operation of 2T write-in policy, and details are as follows, behind the adjustment operation start of 2T write-in policy, controller 16 is just carried out firmware 20 writes a CD with control data operation, therefore controller 16 is just according to predetermined 2T write-in policy (for example Fig. 2 and known 2T write-in policy shown in Figure 3) power controlling control module 14, power control unit 14 just drives optical pick-up unit 12 and write a plurality of strange record marks (5T record mark for example on this CD then, the 7T record mark, the 9T record mark, the 11T record mark) and a plurality of even record mark (4T record mark for example, the 6T record mark, the 8T record mark, the 10T record mark) (step 102), that is above-mentioned a plurality of strange record mark and a plurality of even record mark are intended for the test record mark.
Then, optical pick-up unit 12 begins to read above-mentioned a plurality of strange record mark and a plurality of even record mark to write down its signal intensity profile characteristic respectively, sees also Fig. 5, and Fig. 5 is the synoptic diagram of the signal intensity profile characteristic of record mark, wherein transverse axis is represented the time, and vertical axis represent signal intensity.Show three family curves 22,24,26 among Fig. 5, be respectively three kinds of issuable signal intensity profile of corresponding same record mark.For instance, for the 10T record mark, family curve 24 is to be its idealized characteristic, that is the maximum signal of 10T record mark can form when time T 2.Yet, if after reading the 10T record mark, family curve 22 is detected, as shown in Figure 5, family curve 22 pairing time spans are less than family curve 24 pairing time spans, significantly, the maximum signal of 10T record mark forms in time T 1, that is family curve 22 can be offset Ideal Characteristics curve 24, and the actual sequential T1 of maximum signal is early than desirable sequential T2, known as industry, when 10T record mark correspondence family curve 22, the recordable time of expression 10T record mark is too short, in other words, if write the 10T record mark on CD according to 2T write-in policy shown in Figure 2, the duration that then writes period Tmn is too short and cause the corresponding family curve 22 of 10T record mark at last.On the contrary, if after reading the 10T record mark, family curve 26 is detected, as shown in Figure 5, family curve 26 pairing time spans are greater than family curve 24 pairing time spans, significantly, the maximum signal of 10T record mark forms in time T 3, that is family curve 26 can be offset Ideal Characteristics curve 24, and the actual sequential T3 of maximum signal is later than desirable sequential T2, known as industry, when 10T record mark correspondence family curve 26, the recordable time of expression 10T record mark is long, in other words, if write the 10T record mark on CD according to 2T write-in policy shown in Figure 2, the duration that then writes period Tmn is oversize and cause the corresponding family curve 26 of 10T record mark at last.
As mentioned above, the method that the present invention adjusts the 2T write-in policy just can judge whether to need to adjust the duration of Writing power according to the pairing signal intensity profile of each record mark on the CD, so just detecting the sequential of the maximum signal of an even record mark, present embodiment whether departs from a desirable sequential (step 106), if the sequential of the maximum signal of this idol record mark departs from this ideal sequential, then the duration of Writing power just needs to adjust further so that the desirable sequential (step 108) of the sequential convergence of maximum signal in the 2T write-in policy.When this idol record mark family curve 22 corresponding shown in Figure 5, then present embodiment can be adjusted the duration of Writing power in the 2T write-in policy so that increase total recordable time of this idol record mark; On the contrary, when this idol record mark family curve 26 corresponding shown in Figure 5, then present embodiment can be adjusted the duration of Writing power in the 2T write-in policy so that reduce total recordable time of this idol record mark.
Certainly, the family curve of Fig. 5 might not be to be offset the time of (or not being) maximum signal yet, but the situation that (or also having) characteristic distribution broadens or narrows down.But the reason of this moment, except the duration of Writing power is improper, also might be laser power inappropriate or focus on improper or the like.Therefore, will change the recordable time altogether to this record mark this moment in the mode of trial and error (try and error), look for the only Writing power duration.
See also Fig. 6, Fig. 6 sets the synoptic diagram of the 2T write-in policy of an even record mark for the inventive method.Known as industry, even record mark includes the 2T record mark, the 4T record mark, and the 6T record mark, 8T record mark, and 10T record mark, and Fig. 6 illustrates with the 10T record mark.In the present embodiment, when controller 16 startup 2T write-in policies form the 10T record mark on CD, at first, controller 16 driving power control modules 14 are set optical pick-up unit 12 and are exported the power P e that erases, when time t1, controller 16 driving power control modules 14 are set optical pick-up unit 12 and are write lasting output th writing power P w among the period Ta in one, then, controller 16 just driving power control module 14 is set optical pick-up unit 12 output reference power P b, significantly, optical pick-up unit 12 output th writing power P w heat the phase transformation material of CD, and when optical pick-up unit 12 output reference power P b, the phase transformation material of CD can be cooled off thereupon.Then when time t2, controller 16 driving power control modules 14 are set optical pick-up unit 12 and are write lasting output th writing power P w among the period Tb in one, then, controller 16 again driving power control module 14 set optical pick-up unit 12 output reference power P b.As shown in Figure 7, controller 16 is set optical pick-up unit 12 lasting output th writing power P w in writing period Tb respectively at time t3, t4 driving power control module 14 after a while.Optical pick-up unit 12 has been finished the operation of four heating in the time of 0～8T, therefore optical pick-up unit 12 needs to carry out the operation of last heating in the time of 8T～10T according to the 2T write-in policy, in the present embodiment, controller 16 driving power control module 14 when time t5 is set optical pick-up unit 12 and is write lasting output th writing power P w among the period Tc in one, at last, optical pick-up unit 12 is in a cooling period T ' output reference power P b, and controller 16 again driving power control module 14 set optical pick-up unit 12 outputs and erase power P e and finish the purpose that forms the 10T record mark.
Note that to write period Ta, write period Tb, and write period Tc for can dynamically adjusting, that is write period Ta, Tb, Tc can distinguish corresponding different setting values.Fig. 7 is the output power waveform that display optical pickup unit 12 forms the 10T record mark, for other even record marks, it forms with the formation of 10T record mark similar, with the 4T record mark is example, in time 0～2T, finish the output of write-once power P w (its duration is heating period Ta) when optical pick-up unit 12 after, optical pick-up unit 12 is then finished the output of another time th writing power P w (its duration is heating period Tc) in 2T～4T, then, optical pick-up unit 12 is similarly in cooling period T ' output reference power P b, and optical pick-up unit 12 is exported the purpose of erasing power P e and finishing formation 4T record mark again.
So, when the corresponding family curve 22 shown in Figure 5 of 10T record mark, then present embodiment can be adjusted the time length of heating period Ta, Tb, Tc, for example increase the duration of heating period Ta, Tb, Tc simultaneously or keep the duration of heating period Tb and the duration of increase heating period Ta, Tc, all can reach the purpose of the recordable time that increases the 10T record mark, after the recordable time of 10T record mark increases, the convergence the family curve 24 but signal power of 10T record mark distributes just and have preferable burning quality.In addition, when the 10T record mark is corresponding family curve 26 shown in Figure 5, then present embodiment can be adjusted the time length of heating period Ta, Tb, Tc, for example reduce the duration of heating period Ta, Tb, Tc simultaneously or keep the duration of heating period Tb and the duration of minimizing heating period Ta, Tc, all can reach the purpose of the recordable time that reduces the 10T record mark, after the recordable time of 10T record mark reduces, the convergence the family curve 24 but signal power of 10T record mark distributes just and have preferable burning quality.
Similarly, whether the sequential that present embodiment also can detect the maximum signal of a strange record mark departs from a desirable sequential (step 110), if the sequential of the maximum signal of this strange record mark departs from this ideal sequential, then the duration of Writing power just needs to adjust further so that the desirable sequential (step 112) of the sequential convergence of maximum signal in the 2T write-in policy.When this strange record mark family curve 22 corresponding shown in Figure 5, then present embodiment can be adjusted the duration of Writing power in the 2T write-in policy so that increase the recordable time of this strange record mark; On the contrary, when this strange record mark family curve 26 corresponding shown in Figure 5, then present embodiment can be adjusted the duration of Writing power in the 2T write-in policy so that reduce the recordable time of this strange record mark.
See also Fig. 7, Fig. 7 sets the synoptic diagram of the 2T write-in policy of a strange record mark for the inventive method.Known as industry, strange record mark includes the 3T record mark, the 5T record mark, and the 7T record mark, 9T record mark, and 11T record mark, and Fig. 7 illustrates with the 11T record mark.When controller 16 startup 2T write-in policies come to form the 11T record mark on CD, at first, controller 16 driving power control modules 14 are set optical pick-up unit 12 and are exported the power P e that erases, when time t6, controller 16 driving power control modules 14 are set optical pick-up unit 12 and are write lasting output th writing power P w among the period Td in one, then, controller 16 just driving power control module 14 set optical pick-up unit 12 output reference power P b.Then, when time t7, controller 16 driving power control modules 14 are set optical pick-up unit 12 and are write among the period Te in one and continue output th writing power P w, and then, controller 16 driving power control module 14 is again set optical pick-up unit 12 output reference power P b.As shown in Figure 6, controller 16 is set optical pick-up unit 12 lasting output th writing power P w in writing period Te respectively at time t8, t9 driving power control module 14 after a while.Because optical pick-up unit 12 has been finished the operation of four heating in the time of 0～8T, therefore optical pick-up unit 12 needs to carry out the operation of last heating in the time of 8T～11T according to the 2T write-in policy, in the present embodiment, controller 16 driving power control module 14 when time t10 is set optical pick-up unit 12 and is write lasting output th writing power P w among the period Tf in one, at last, optical pick-up unit 12 is in a cooling period T " output reference power P b; then, controller 16 driving power control module 14 is again set the purpose that optical pick-up unit 12 outputs are erased power P e and finished formation 11T record mark.
Note that to write period Td, write period Te, and write period Tf for can dynamically adjusting, that is write period Td, Te, Tf can distinguish corresponding different setting values.Fig. 7 is the output power waveform that display optical pickup unit 12 forms the 11T record mark, for other strange record marks, it forms with the formation of 11T record mark similar, with the 5T record mark is example, in time 0～2T, finish the output of write-once power P w (its duration is heating period Td) when optical pick-up unit 12 after, optical pick-up unit 12 is then finished the output of another time th writing power P w (its duration is heating period Tf) in 2T～5T, then, optical pick-up unit 1 is similarly in cooling period T " output reference power P b; then, optical pick-up unit 12 is exported the purpose of erasing power P e and finishing formation 5T record mark again.
When the corresponding family curve 22 shown in Figure 5 of 11T record mark, then present embodiment can be adjusted the time length of heating period Td, Te, Tf, for example increase the duration of heating period Td, Te, Tf simultaneously or keep the duration of heating period Te and the duration of increase heating period Td, Tf, all can reach the purpose of the recordable time that increases the 11T record mark, after the recordable time of 11T record mark increases, the convergence the family curve 24 but signal power of 11T record mark distributes just and have preferable burning quality.In addition, when the 11T record mark is corresponding family curve 26 shown in Figure 5, then present embodiment can be adjusted the time length of heating period Td, Te, Tf, for example reduce the duration of heating period Td, Te, Tf simultaneously or keep the duration of heating period Te and the duration of minimizing heating period Td, Tf, all can reach the purpose of the recordable time that reduces the 10T record mark, after the recordable time of 11T record mark reduces, the convergence the family curve 24 but signal power of 12T record mark distributes just and have preferable burning quality.
When the strange record mark of rewritable formula CD player 10 burnings and even record mark are on CD, the period that writes that writes period and corresponding even record mark of corresponding strange record mark is and can independently adjusts, in other words, when forming strange record mark and even record mark, known technology is general and use the same period Tmn that writes and carry out heating operation for another example for optical pick-up unit 12.For instance, known 2T write-in policy is when writing an even record mark and a strange record mark, and it must adopt two kinds of differences to write period Tmn, Tmn
+Apply Writing power on CD, yet for a strange record mark, the method that the present invention adjusts the 2T write-in policy can be used at least two kinds of differences and write the period (for example Ta=Tb Tc) applies Writing power on CD.In addition, for an even record mark, the method that the present invention adjusts the 2T write-in policy can be used at least three kinds of differences and write period (Td for example, Te, therefore Tf) apply Writing power on CD, when writing an even record mark and a strange record mark, it can be used at least three kinds of differences and write period (Ta=Tb=Td=Te for example, Tc Tf) applies Writing power on CD.So, for writing of a strange record mark, heating period Ta, Tb, the individual settings of Tc can make phase transformation material corresponding equably amorphous state in one first predetermined length, in addition, for writing of an even record mark, heating period Td, Te, the individual settings of Tf then may make phase transformation material also corresponding equably amorphous state in one second predetermined length, in other words, when record mark that optical pick-up unit 12 reads on the CD to be write down, the high-frequency signal of corresponding strange record mark all can have good waveform with the high-frequency signal of corresponding even record mark, therefore can be convenient to follow-up error recovery and correctly capture desired data with the decoding computing.
As shown in Figure 6, optical pick-up unit 12 is in time t2, t3, begin to export th writing power P w during t4, and continue output th writing power P w in same write among the period Tb, yet, optical pick-up unit 12 also can be in time t2, t3, t4 begins to write lasting output of period th writing power P w with difference respectively, for instance, when optical pick-up unit 12 forms the 10T record mark, optical pick-up unit 12 can be in time t1, t2, t3, t4, t5 exports th writing power P w with the period that writes of various durations respectively, and for other even record marks, also the period that writes that can use different length in the time of each 2T is carried out heating operation, also can reach 2T write-in policy of the present invention adjustment and respectively write the period to improve the purpose of burning quality.Similarly, optical pick-up unit 12 also can begin in time t7, t8, t9 shown in Figure 7 to write lasting output of period th writing power P w with difference respectively.
Apparently, as long as the technology of hardware and software can be reached many elements are incorporated on the same CD player, a preferred embodiment of the present invention is to allow the CD player of known technology comprise a detecting unit (detector) again.See also Fig. 8, Fig. 8 is the synoptic diagram of rewritable formula CD player 30 of the present invention.Rewritable formula CD player 30 includes an optical pick-up unit 32, one power control units 34, and a detecting unit 36.At this, detecting unit 36 is to be electrically connected on power control unit 34, and in order to read these strange record marks and these even record mark gained information according to optical pick-up unit 32, how notice power control unit 34 revises these writes the period.At this, detecting unit 36 can be according to a predefined database, and according to the difference of actual burn result with the most desirable burning result, how notice power control unit 34 revises these writes the period; Detecting unit 36 also can be according to the profile of these strange record marks and these even record marks and the analysis of distribution, how to revise these by power control unit 34 and writes the period.Apparently, detecting unit 36 can be hardware, software or firmware with power control unit 34.
Further, whether another preferred embodiment of the present invention be or not detecting unit and CD player not to be integrated, but utilize a kind of CD player corrective system of the previous notion institute construction of introducing.See also Fig. 9, Fig. 9 is the synoptic diagram of CD player corrective system 40 of the present invention.CD player corrective system 40 includes a detecting unit 42, in order to analyze other profile and the distribution of different recording mark on the CD, one optical pick-up unit 46 (it is arranged in the CD player), an and adjustment unit 46, be electrically connected on detecting unit 42 and optical pick-up unit 44, in order to according to detecting unit 42 information that obtains of analyzing, change employed a plurality of periods that write of optical pick-up unit 44 (or CD player writes the part of period in order to control), write the period these these and be correspondence at least three time spans and by optical pick-up unit 44 in order to according to exporting a laser to form a strange record mark and an even record mark on CD.Apparently, detecting unit 42 can be hardware, software or firmware with adjustment unit 46.
Compared to known technology, 2T write-in policy of the present invention is when burning idol record mark and strange record mark, the idol record mark write writing period length and can individually setting of period length and strange record mark, so can make even record mark and strange record mark all have good burning quality via the suitable setting that writes the period, that is when record mark that an optical pick-up unit reads on the CD to be write down, the high-frequency signal of corresponding even record mark all can have good waveform with the high-frequency signal of corresponding strange record mark, therefore rewritable formula CD player just can successfully capture the pairing data of record mark, can reduce the operation of follow-up error recovery simultaneously.
The above only is preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to the covering scope of patent of the present invention.
Claims (10)
1. method of adjusting the 2T write-in policy (2T write strategy) of CD player, it includes:
(a) on a CD, form a strange record mark of test and the even record mark of a test;
(b) detect testing strange record mark and this tests the signal waveform of even record mark;
And
(c), then a plurality ofly write the period according to what this first residual quantity correction was used for producing an even record mark if this tests corresponding one first residual quantity with the sequential of the maximum signal of one first ideal waveform of sequential of maximum signal of the signal waveform of even record mark; And, then a plurality ofly write the period according to what this second residual quantity correction was used for producing a strange record mark if this tests corresponding one second residual quantity with the sequential of the maximum signal of a secondary ideal waveform of sequential of maximum signal of the signal waveform of strange record mark.
2. the method for claim 1, wherein step (c) includes in addition:
When forming this idol record mark in this CD, use one first to write the period and one second and write the period and export a Writing power, wherein this first writes period and this second to write the period is corresponding different time length;
When forming this idol record mark in this CD, use one the 3rd to write the period, one the 4th writes the period, and one the 5th write the period and export this Writing power, the 4th to write the period be to write between the period between the 3rd, five, the 3rd writes the period, and the 4th writes the period, and the 5th to write the period be corresponding different time length; Perhaps
When forming this idol record mark in this CD, use one the 6th to write the period, the a plurality of the 7th writes the period, and one the 8th write the period and export this Writing power, wherein this a plurality of the 7th to write the period be to write between the period between the 6th, eight, a plurality of the 7th to write the period be corresponding same time span for this, and the 6th writes the period, one the 7th writes the period, and the 8th to write the period be corresponding different time length.
3. method as claimed in claim 2, wherein this first to write the period be to handle the once time of this CD corresponding to this Writing power, second to write the period be the time of handling this CD corresponding to a reference power for this, the 3rd to write the period be the time of handling this CD corresponding to this Writing power for the first time, the 4th to write the period be the time of handling this CD corresponding to this Writing power once more, the 5th write time was the time of handling this CD corresponding to this reference power, the 6th to write the period be the time of handling this CD corresponding to this Writing power for the first time, the 7th to write the period be each time time when repeatedly handling this CD corresponding to this Writing power, and the 8th write time was the time of handling this CD corresponding to this reference power.
4. the method for claim 1, wherein in step (c), if the sequential of the maximum signal of this signal waveform is later than the sequential of the maximum signal of this first ideal waveform, then reduce a plurality of total durations that write the period of this idol record mark, and if the sequential of the maximum signal of this signal waveform early than the sequential of the maximum signal of this ideal waveform, then increases a plurality of total durations that write the period of this idol record mark.
5. the method for claim 1, wherein step (c) includes in addition:
When this CD forms this strange record mark, use one first to write the period and one second and write the period and export a Writing power, wherein this first writes the period second to write the period is corresponding different time length with this;
When this CD produces this strange record mark, use one the 3rd to write the period, one the 4th writes the period, and one the 5th write the period and export this Writing power, the 4th to write the period be to write between the period between the 3rd, five, wherein the 3rd write the period, the 4th writes the period, and the 5th to write the period be corresponding different time length; Perhaps
When this CD produces this strange record mark, use one the 6th to write the period, the a plurality of the 7th writes the period, and one the 8th write the period and export this Writing power, the a plurality of the 7th to write the period be to write between the period between the 6th, eight for this, wherein this a plurality of the 7th to write the period be corresponding same time span, and the 6th writes the period, one the 7th writes the period, and the 8th to write the period be corresponding different time length.
6. method as claimed in claim 5, wherein this first to write the period be to correspond to this Writing power to handle the once time of this CD, second to write the period be to correspond to the time of handling this CD with a reference power for this, the 3rd to write the period be to correspond to the time of handling this CD with this Writing power for the first time, the 4th to write the period be to correspond to the time of handling this CD with this Writing power once more, the 5th write time was the corresponding time of handling this CD with this reference power, the 6th to write the period be to correspond to the time of handling this CD with this Writing power for the first time, the 7th to write the period be the time that corresponds to when repeatedly handling this CD with this Writing power each time, and the 8th write time was the corresponding time of handling this CD with this reference power.
7. the method for claim 1, wherein in step (c), if the sequential of the maximum signal of this signal waveform is later than the sequential of the maximum signal of this secondary ideal waveform, then reduce a plurality of total durations that write the period of this strange record mark, and if the sequential of the maximum signal of this signal waveform early with the sequential of the maximum signal of this secondary ideal waveform, then increase a plurality of total durations that write the period of this strange record mark.
8. CD player, it includes:
(optical pick-up unit OPU), is used for exporting a laser to produce a plurality of strange record marks (odd nark) and a plurality of even record mark (evenmark) in a CD etching to one optical pick-up unit; And
One control module (controller), be electrically connected on this optical pick-up unit, be used for driving this optical pick-up unit according to a 2T write-in policy (2T write strategy), this optical pick-up unit of this control module may command uses corresponding at least three time spans a plurality ofly writes the period and exports this laser to form a strange record mark and an even record mark on this CD.
9. CD player as claimed in claim 8, more comprise a detecting unit (detector), be electrically connected on this control module,, notify this control module how to revise those and write the period in order to read the information of those strange record marks and those even record mark gained according to this optical pick-up unit.
10. CD player corrective system, it includes:
One detecting unit is in order to analyze other profile and the distribution of different recording mark on the CD;
And
One adjustment unit, be electrically connected on this detecting unit and an optical pick-up unit, in order to analyze the information that obtains according to this detecting unit, change employed a plurality of periods that write of this optical pick-up unit, write the period these those and be correspondence at least three time spans and by this optical pick-up unit in order to according to exporting a laser to form a strange record mark and an even record mark on this CD;
Wherein the family curve when a certain record mark correspondence early reaches maximal value than an idealized characteristic, this adjustment unit just increases the recordable time altogether to this record mark, when a family curve of a certain record mark correspondence reaches maximal value evening than an idealized characteristic, this adjustment unit just reduces the recordable time altogether to this record mark, and come to such an extent that broaden than the distribution of an idealized characteristic or narrow down when a characteristic distribution of a certain record mark correspondence, just in trial and error (try and error) mode, change recordable time altogether to this record mark.
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| CN 200310120204 CN1252695C (en) | 2003-12-09 | 2003-12-09 | Method for regulating 2T writing policy, CD player and correction system thereof |
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| CN 200310120204 CN1252695C (en) | 2003-12-09 | 2003-12-09 | Method for regulating 2T writing policy, CD player and correction system thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1928996B (en) * | 2005-09-07 | 2011-04-06 | 三星电子株式会社 | Method for correcting write strategy data of an optical disc and optical disc drive using the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1928996B (en) * | 2005-09-07 | 2011-04-06 | 三星电子株式会社 | Method for correcting write strategy data of an optical disc and optical disc drive using the same |
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