CN100401382C - Optical recording media - Google Patents
Optical recording media Download PDFInfo
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- CN100401382C CN100401382C CNB2005100290429A CN200510029042A CN100401382C CN 100401382 C CN100401382 C CN 100401382C CN B2005100290429 A CNB2005100290429 A CN B2005100290429A CN 200510029042 A CN200510029042 A CN 200510029042A CN 100401382 C CN100401382 C CN 100401382C
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- 230000003287 optical effect Effects 0.000 title claims description 9
- 238000000465 moulding Methods 0.000 claims description 8
- 230000001360 synchronised effect Effects 0.000 abstract 1
- 230000008929 regeneration Effects 0.000 description 6
- 238000011069 regeneration method Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 4
- 238000006731 degradation reaction Methods 0.000 description 4
- 241000304170 Blera Species 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- FNMKZDDKPDBYJM-UHFFFAOYSA-N 3-(1,3-benzodioxol-5-yl)-7-(3-methylbut-2-enoxy)chromen-4-one Chemical compound C1=C2OCOC2=CC(C2=COC=3C(C2=O)=CC=C(C=3)OCC=C(C)C)=C1 FNMKZDDKPDBYJM-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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Abstract
The invention relates to a disc which can use the wide range record of land pre-pit disc to improve the address ability, wherein it comprises land pre-pit synchronous bit, relative address bit and user data bit; the first concave of land pre-pit is P1, the second concave is P2, and the third concave is P3, while the lengths of concaves are LP1, LP2, and LP3; the distance between land pre-pit and magnetic track is Tp meets that 2Tp>=LP1>LP2>=LP3.
Description
[technical field]
The invention relates to optical recording media, refer in particular to the CD that uses in the wide range with the land pre-pit signal of DVD-R/RW addressing.
[background technology]
General as the information record, get rid of, and the possible CD of regeneration, DVD-RAM, among the DVD-RW according to the record of certain magnetic track information/or forming regeneration all can form concave point.This concave point is to form when making for the molding press of making substrate.
And write down the control of main axle servo in the possible CD (servo) work and data recording/must comprise address information for the clock (clock) of regenerating occurs in the CD structure.
But the discrepancy of the maximum of DVD-RAM and DVD-RW occurs in recording areas.
That is, DVD-RAM is recorded in concave point district and base station district, all exists with the pit form for the zone that the address (address) of seeking each unit of information position exists according to certain physical unit.
Resemble DVD-R/RW on the contrary and possess base station (land) and concave point (groove) magnetic track, but can only be in above-mentioned concave point magnetic track record data.And above-mentioned base station magnetic track makes land pre-pit (LandPre-pit:LPP) position arranged and comprised physical address, do not comprise data pits.
That is, the physical address of concave point magnetic track (Physical address) is formed by pit and comes record in the above-mentioned base station magnetic track, and above-mentioned in addition LPP contrast concave point magnetic track and phase place are recorded.
Many problems can appear when then, using record range in the situation of DVD-R/RW of land pre-pit addressing to increase record as CD DCD wide range gradually together with the shake that possesses a uniform amplitude and a cycle.
Particularly, have very big variation for land pre-pit signal standard (level) amplitude (Amplitude) of addressing according to the record and the regeneration condition of the wide range of disk behind whole record and the partial record, therefore the BELRa of the address decoding performance behind the record can increase, and this is a shortcoming.
Then, for the length of replenishing such shortcoming increase land pre-pit will be subjected to the very big interference of especially little signal (3T signal), can distort the RF signal if increase land pre-pit amplitude (amplitude) in addition.At this moment, not only signal waveform is inhomogeneous but also can cause the degradation of most important characteristics of signals odd even A mistake and signal jitter characteristic for the signal of above-mentioned distortion.
Be necessary to grope to improve the method for addressing capability after then the mode of the DVD-R/RW of use land pre-pit addressing (Land pre-pit addressing) writes down in the wide range record.
[summary of the invention]
The present invention's innovation and creation in order to solve aforesaid problem, its purpose just provide the record CD that addressing capability is improved in record back in the wide range record of the CD that utilizes above-mentioned land pre-pit (land pre-pit).
Pre-pit synchronizing code (the Pre-pit sync code) position that comprises land pre-pit for the feature of the optical recording media of the present invention of realizing aforesaid purpose is formed by relative address (relative address) position and user data (user data), first pit of land pre-pit (the firstpit) is called P1, second pit (the second pit) is called P2, the 3rd pit (the thirdpit) is called P3, first pit, second pit, the length of the 3rd pit is called LP1 respectively, LP2, LP3, land pre-pit satisfies 2Tp＞=LP1＞LP2＞=LP3 with the track pitch that is called Tp, forms land pre-pit.
And, also have such feature: the height of first pit, second pit, the 3rd pit is called AP1 respectively, AP2, AP3, the same with land pre-pit the degree of depth of concave point (The depth ofGroove) is called Dg, satisfy Dg＞=AP3＞=AP2＞AP1, form land pre-pit.
In addition; another feature is: described medium comprise that the molding press center with above-mentioned optic disc base board of constructing by guiding and structure optic disc base board is the spiral recording track of standard on above-mentioned optic disc base board, also comprise the pit that forms in the relevant arbitrary region of the arbitrary data that writes down in the recording track of constructing on above-mentioned optic disc base board with above-mentioned molding press.
Aforesaid optical recording media of the present invention deviation for the land pre-pit amplitude (amplitude) of addressing behind record alters a great deal according to record in the wide rangeization of disk and regeneration condition, and therefore the shortcoming that falls behind for the supplement address decoding performance not only improves the addressing performance but also the RF signal that can reduce the land pre-pit amplitude that is improved is distorted the interference of the regenerated signal that influences.
Other purposes of the present invention, characteristic and benefit will be very clear with reference to the detailed description of accompanying drawing embodiment.
[description of drawings]
Fig. 1 is land pre-pit position and the pie graph of existing DVD-R/RW.
Fig. 2 is that land pre-pit is measured the LPP signal graph that extraction occurs with dither signal in the loop among the existing DVD-R/RW.
Fig. 3 is the location drawing that existing ECC constitutes piece and land pre-pit.
Fig. 4 is the land pre-pit formation figure of DVD-R/RW substrate of the present invention.
Fig. 5 is the sectional view that comprises the land pre-pit formation of DVD-R/RW substrate of the present invention.
[embodiment]
With reference to accompanying drawing the desirable embodiment of optical recording media of the present invention is carried out following explanation.
Take place to want the concave point (groove) of recording disk to also have physical address information in base station (land) face in order to control main axle servo (servo) work or the clock (clock) of the recording/reproducing of data, the record the same with DVD-R/RW may use land pre-pit addressing (land pre-pitaddressing) mode in the type CD.
At this moment; the land pre-pit of DVD-R/RW in recording process with concave point in the information pits that writes down (pit is markedness also; mark) difference can form pit simultaneously when making the concave point that the information of calculating in the modulator in control (mastering) engineering of molding press of boot disk utilizes laser beam record molding press in the base station magnetic track.
Fig. 1 is the position of land pre-pit of DVD-R/RW and an illustration of structure, and Fig. 2 is that land pre-pit is measured and extracted an illustration that occurs the LPP signal with dither signal in the loop among the DVD-R/RW.
Survey the LPP signal write down in the magnetic track of above-mentioned DVD-R/RW, survey address information that track location occurs, synchronizing signal etc.
Following 1 pair of above-mentioned land pre-pit of DVD-R/RW disk embodiment (LPP) position describes.
The DVD-R/RW disk is formed by data recording regeneration ECC (Error Correction Code) piece (block) unit, an ECC (ErrorCorrection Code) piece (block) that comprises the user data and the information that corrects mistakes as described in Figure 3 is made of 16 physical sectors (physical sectors), and a physical sector is formed by 26 synchronization frames (sync frame) again.And there are 8 shakes (wobble) again in above-mentioned 1 synchronization frame (sync frame).
Modulating the above-mentioned certain clock that is called shake here is exactly the information that comprises in disk.For example, the information of relevant position, the information of disk reaction velocity etc. are extracted in the loop in shake and are obtained.
There is land pre-pit in the position on relevant shake summit like this.
The words of at first observing the Frame length of land pre-pit form 8 of 1 pre-pit synchronizing code and 4 of relative addresses (relative address) and user data.
Such pre-pit data frame length forms pre-pit physical sector (physical sector) by a process that is transformed into 3.And write down in each physical sector even number (even) frame length same period and write down the LPP data in LPP data or odd number (odd) frame length same period.Also have and write down 39 LPP data in the physical sector.
And one to the land pre-pit that is arranged in first shake summit be called frame length synchronously the position of the 14T on (SYNC) position, this next door (also have by mark name), the 32 bit synchronization codes (32bit sync code) that form by base station because of being that information is recorded in concave point.
In addition, be arranged in the land pre-pit of the second and the 3rd shake, according to the sign of land pre-pit promptly, the 1st, land pre-pit exists, and the 0th, land pre-pit does not exist.
The above-mentioned odd number frame length same period has the even number frame length same period among Fig. 1 in the magnetic track of adjacency, writes down the LPP data for the LPP that prevents and write down overlaps for the second time in the frame length same period in the starting position of the even number frame length same period of adjacency.
And as described in Figure 2 the even number frame length same period the starting position promptly, for the first time (position b2) is 111 to the LPP that loads in the frame length same period for b0, b1, and the LPP that load in the frame length same period second time of the odd number frame length same period is 110.Here b0, b1, b2 are referred to as the position same period.
Then frame length utilized the above-mentioned same period of position (b2) differentiating the even number frame length same period still was the odd number frame length same period for b0, b1 the same period now.
Promptly, the above-mentioned same period position (b0, b1, b2) if 111 words are exactly the even number frame length same period be, in the even number position, form the even number sector of record LPP data, the above-mentioned same period position (b0, b1, b2) if 110 words be exactly the odd number frame length same period promptly, in odd positions, form the odd number of sectors of record LPP data.
And the even number sector of LPP data is put down in writing to formation in the even number frame length same period in first sector one of each ECC piece among the DVD-R/RW.
Be necessary the above land pre-pit detectable signal of the standard that can measure is extracted from dither signal for the information that obtains recording mode (write strategy) also has the general information and the address information of recording medium, LPP determinator from land pre-pit.
In addition, the kind of such signal is and preceding LPPB (the Land pre-pit amplitude before recording relevant with the land pre-pit signal amplitude of record, 0.18＜LPPb＜0.28) and the same signal project of the ratio A R (ApertureRatio, AR＞15%) of the maximin of the land pre-pit amplitude except the record back shake amplitude.
The stabilization signal amplitude is adjusted the degree of depth or the length or the width of land pre-pit before the general record, and the amount of the light of the formation diffraction of adjustment position so LPP will be different in the concave point of adjacency.Then, the standard of the signal that sends according to the intensity PD of the light quantity that arrives PD will be different, the shape of LPP and position before the energy minimization record land pre-pit signal amplitude (LPPb) will become bad.
Particularly, if the excessive meeting of LPP signal amplitude brings influence for the RF signal before the record, will produce interference when the words that the length of signal is longer than the length of 3T signal are read the concave point magnetic track of adjacency in addition, Here it is increases the major reason of signal jitter characteristic and PI8Sum.
Can be counted as rub-out signal if the signal of LPPb is too small in addition, then the words not measured of LPP analytical unit are owing to a ratio of error (the block error rate beforerecording of land pre-pit, BLERb) increase, it is very difficult to obtain correct address information, has brought a lot of problems to record.
In addition not only before record but also behind record beyond the recorded information from the address of land pre-pit obtain and recording section need AR and ratio of error (block error rate after recording, a BLERa) information for correct addressing in the record non-recorded part.Because it is bad that the degradation of the LPP that writes down in the base station magnetic track, the addressing characteristic behind the record are that AR and BLERa characteristic can become.
The illustrational words of non--a plurality of (non-multi) recording mode, smallest record power (optimumrecording power, Po) and the too low situation of ratio (Po/Pm) of intermediate record power (Pm) be that dyestuff variable color or the destroyed reflectance of land pre-pit that the land pre-pit of the adjacency disturbed according to the heat of the mark of record comprises diminishes.Then, the amplitude variations of the LPP signal behind the record has increased.
Increased the unevenness of such land pre-pit signal.That is, AR value step-down has increased the value of BLERa in addition according to the degradation of land pre-pit.Address information after then writing down from land pre-pit discharges easily.
But the high situation of that ratio from the negative: the 14T signal waveform that uneven type level is a standard can be distorted.In addition, the situation of wide range record is that also to be the breaking-up that causes land pre-pit of the mechanicalness problem of effective radius increase, photoelectrical coupler and tracking servo of the light of the influence disturbed by the heat that high record wave source causes, photoelectrical coupler beyond the record ratio can more increase one deck according to the degree of the degradation of range increase land pre-pit.
Then comprise pre-pit synchronizing code (the Pre-pit sync code) position of land pre-pit as described in Figure 4, form the land pre-pit group by relative address (relative address) position for the structure of the land pre-pit that replenishes these.
At this moment, first pit of land pre-pit (the first pit) is called P1, second pit (the second pit) is called P2, the 3rd pit (the third pit) is called P3, the length of each pit is called LP1, LP2, LP3 respectively, land pre-pit satisfies 2TP＞=LP1＞LP2＞=LP3 with the track pitch (Trackpitch) that is called Tp, adjusts land pre-pit.
First pit of land pre-pit (the first pit) is called P1 as described in Figure 5 in addition; second pit (the second pit) is called P2; the 3rd pit (the third pit) seen the words of the sectional view of optic disc base board when being called P3; the height of land pre-pit (Height) is called AP1 to the height of each pit respectively; AP2; AP3; be called Dg with the degree of depth (The depth ofGroove) of the same concave point of land pre-pit; satisfy Dg＞=AP3＞=AP2＞AP1; adjust land pre-pit; making can be made the molding press of DVD-R/RW disk, makes the record that disk carries out wide range with it.
LPP with disk of above-mentioned shape measures by the amplitude limit standard and obtains the LPP signal from LPP perception loop after the dither signal amplitude limit.
The LPP that then has an above-mentioned shape is not subjected to the influence of wide range record and regeneration, obtain confirm LPP group the same period signal effect improve, then improve the addressing capability behind the record, also can improve among the AR of the intensity of variation of the land pre-pit behind record.
In not breaking away from technological thought scope of the present invention, can carry out various change and modification by aforesaid content.
Then, technical scope of the present invention is not the content that is limited to the embodiment record, but fixes in the claim item scope.
Claims (3)
1. optical recording media, comprise land pre-pit, the pre-pit synchronizing code position of this land pre-pit is formed by relative address position and user bit, first pit of land pre-pit is called P1, and second pit is called P2, and the 3rd pit is called P3, the length of first pit, second pit, the 3rd pit is called LP1 respectively, LP2, LP3, land pre-pit need satisfy with the track pitch that is called Tp: 2Tp＞=LP1＞LP2＞=LP3.
2. according to the optical recording media of claim item 1, it is characterized in that the height of first pit, second pit, the 3rd pit is called AP1 respectively, AP2, AP3, the same degree of depth concave point with land pre-pit calls Dg, needs to satisfy:
Dg＞＝AP3＞＝AP2＞AP1。
3. according to the optical recording media of claim item 1; it is characterized in that; described medium comprise that the molding press center with above-mentioned optic disc base board of constructing by guiding and structure optic disc base board is the spiral recording track of standard on above-mentioned optic disc base board, also comprise the pit that forms in the relevant arbitrary region of the arbitrary data that writes down in the recording track of constructing on above-mentioned optic disc base board with above-mentioned molding press.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100290429A CN100401382C (en) | 2005-08-24 | 2005-08-24 | Optical recording media |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100290429A CN100401382C (en) | 2005-08-24 | 2005-08-24 | Optical recording media |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1920964A CN1920964A (en) | 2007-02-28 |
| CN100401382C true CN100401382C (en) | 2008-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100290429A Expired - Fee Related CN100401382C (en) | 2005-08-24 | 2005-08-24 | Optical recording media |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1214787A (en) * | 1996-12-06 | 1999-04-21 | 皇家菲利浦电子有限公司 | System for storing and/or reproducing information |
| CN1244004A (en) * | 1998-07-23 | 2000-02-09 | 太阳诱电株式会社 | Optical data media |
| WO2002015177A2 (en) * | 2000-08-11 | 2002-02-21 | Pioneer Corporation | Optical disc and information reproducing apparatus for same |
| US20020093906A1 (en) * | 2001-01-12 | 2002-07-18 | Takayuki Deno | Optical disc substrate and manufacturing method of optical disc master for manufacturing the optical disc substrate |
| JP2002279697A (en) * | 2001-01-12 | 2002-09-27 | Victor Co Of Japan Ltd | Method for manufacturing optical disk substrate and optical master disk |
-
2005
- 2005-08-24 CN CNB2005100290429A patent/CN100401382C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1214787A (en) * | 1996-12-06 | 1999-04-21 | 皇家菲利浦电子有限公司 | System for storing and/or reproducing information |
| CN1244004A (en) * | 1998-07-23 | 2000-02-09 | 太阳诱电株式会社 | Optical data media |
| WO2002015177A2 (en) * | 2000-08-11 | 2002-02-21 | Pioneer Corporation | Optical disc and information reproducing apparatus for same |
| US20020093906A1 (en) * | 2001-01-12 | 2002-07-18 | Takayuki Deno | Optical disc substrate and manufacturing method of optical disc master for manufacturing the optical disc substrate |
| JP2002279697A (en) * | 2001-01-12 | 2002-09-27 | Victor Co Of Japan Ltd | Method for manufacturing optical disk substrate and optical master disk |
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| Publication number | Publication date |
|---|---|
| CN1920964A (en) | 2007-02-28 |
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Granted publication date: 20080709 |