CN100446091C - Optical disk medium, optical disk reproducing device and storage device - Google Patents
Optical disk medium, optical disk reproducing device and storage device Download PDFInfo
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- CN100446091C CN100446091C CNB2005101248927A CN200510124892A CN100446091C CN 100446091 C CN100446091 C CN 100446091C CN B2005101248927 A CNB2005101248927 A CN B2005101248927A CN 200510124892 A CN200510124892 A CN 200510124892A CN 100446091 C CN100446091 C CN 100446091C
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Abstract
On an optical disk medium according to the present invention, address information is recorded along a wobbling track groove 2. The track groove 2 is made up of a plurality of unit sections 22, 23. Each of these unit sections 22, 23 has side faces that are displaced periodically in a disk radial direction. This displacement oscillates at a single period in a tracking direction. However, the displacement pattern differs depending on 'each bit of address information (subdivided information)' allocated to each of the unit sections 22, 23.
Description
The application is that application number is 01815045.4, and the applying date is August 30 calendar year 2001, and denomination of invention is divided an application for " CD media and optical disk reproducing apparatus and memory storage ".
Technical field
The present invention relates to can high density canned data (such as digital video information) CD.
Background technology
The storage density of CD media rises on the way in recent years.Generally can write CD media and be pre-formed rail groove, and form the storage film that covers this rail groove.Write the storage data of film or information along rail groove by the user, that is to say on the storage film or storing by the zone (interval) of rail groove clamping.
Rail groove is formed by the same sigmoid curve of sine wave, according to curve cycle (vibration period), regenerated clock signal.User's data and this clock signal are synchronous, write the storage film, perhaps regenerate from the storage film.
For from CD fixed location stored data, the address information (positional information) of the physical location on the expression CD is distributed in each position of CD, must just these address informations be stored on this position in the fabrication phase of CD.Usually the address is with the regional continuous dispensing of regular length along rail groove.The pattern that these address informations are stored in the CD is various.The following describes and pass by the mode of optical disc storage address.
Te Kaiping 6-309672 communique discloses such magnetic disk storage medium, and the rail groove of curve is disconnected in the part, and the reserved area of memory address is set in disconnection portion.Form the pre-groove of some storage address information at the address of rail groove reserved area.The constituted mode that such CD address reserved area and (for canned data) data reserved area on rail groove are and deposit.
Te Kaiping 5-189934 communique discloses a vibration frequency by rail groove, the disk set of record address information.According to such CD, does not separate along orbital direction with the zone that writes data in the zone of storage address information.
Te Kaiping 9-326138 communique discloses the optical disc apparatus that forms pre-groove between the adjacent orbit groove.This pre-groove has been stored address information.According to above-mentioned various CDs, consider have the problem of the following stated to solve from the viewpoint that improves storage density.
At first, the reserved area on rail groove in order to ensure the address reserved area, all will have some additional overhead with the pre-groove storage address information, and the data area is subtracted by pin, consequently has to reduce the operable storage space of user.
Secondly, by modulation to the track vibration frequency, the CD of memory address, existence can't generate the problem of high-precision store clock signal, originally, the vibration of rail groove be used for storing, regenerating operation necessity synchronously, the generation that utilizes clock signal is the thing that forms as fundamental purpose.Under the single situation of this vibration frequency number, along with vibration, the regenerated signal of oscillation amplitude change is doubled synchronously by PLL etc., can generate the high accuracy clock signal.But not single in vibration frequency, when having a plurality of vibration frequency,, must allow the frequency band of following of PLL reduce (comparing) with the situation of single-frequency vibration in order to prevent the similar lock of PLL.At this moment, PLL can't follow trembling that off-centre owing to the trembling of disk motor, disk produces fully, and the result occurs in also to stay on the storage signal and trembles.
On the one hand, the storage film that forms on the CD, when being the phase change film, among rewriting repeatedly, the SN of storage film can descend gradually.If vibration frequency is single, use the total line filter of frequency band of narrowband region can remove the noise composition.When but the vibration frequency number was modulated, therefore the bandwidth of necessary extended filtering device sneaked into the noise composition easily, and vibration is further worsened.Storage density improves from now on, for reducing vibration, prevents the modulated vibration frequency number, the increase that must suppress to tremble.
The structure that the pre-groove of storage address information forms between rail groove, pre-groove is fully long, number is fully many owing to be difficult to make, and along with the raising of storage density, detects wrong can increasing.If the pre-groove between rail groove is very big, also can have influence on the rail groove that closes on.
Summary of the invention
The present invention is in view of above problem, and its fundamental purpose is to reduce extra additional overhead as far as possible, and based on the vibration of rail groove, provides a kind of CD media that the high precision regenerated clock signal can be provided.
Other purposes of the present invention provide the renovation process and the device of memory address on above-mentioned optical disk medium.
CD media of the present invention, has rail groove, along described rail groove canned data, described rail groove comprises a plurality of unit intervals part of arranging on the described rail groove, this a plurality of unit intervals part has the periodically side of displacement along described rail groove, the side of described a plurality of unit intervals part, with single basic cycle displacement, described side is by being formed towards the periphery displacement of described CD media and towards the combination of the mutually different multiple vibrational waveform of steepness of the interior Zhou Bianwei of described CD media, described unit interval part has with single basic cycle displacement and vibrational waveform that have a plurality of cycles, and address information is represented in the combination of described vibrational waveform.
In desirable embodiment, the displacement of above-mentioned rail groove side is towards the outer circumferential side of interior all sides of disk CD media or disk CD media and the displacement that produces from the center line of described magnetic track rail groove.
In desirable embodiment, above-mentioned information is with the block unit storage of given length, and each piece comprises N the unit interval part of arranging along above-mentioned rail groove.
In desirable embodiment, the common side displacement cycle of above-mentioned a plurality of unit intervals part has certain value at least in a piece.
In desirable embodiment, the constituent parts segment part is distributed the secondary information of a position, the secondary message block in part storage N position, the N that comprises each data block unit interval.
In desirable embodiment, the secondary message block in above-mentioned N position comprises that the unit interval part of storing above-mentioned secondary message block belongs to the address information of data block.
In desirable embodiment, the secondary message block in above-mentioned N position comprises error correcting code and/or error-detecging code.
In desirable embodiment, above-mentioned error correcting code or error-detecging code and above-mentioned address information error correcting capability are overlapping, and the next position one side relatively is provided with greatlyyer.
In desirable embodiment, constituent parts segment part signal waveform has two kinds of patterns, stipulate that a kind of rising makes it more precipitous than descending, and suppression ratio rises gently, it is the first side displacement pattern, perhaps the rising of specified waveform is milder than descending, and the second precipitous side displacement pattern of suppression ratio rising.
Address of the present invention renovation process has rail groove, is the CD media along above-mentioned rail groove canned data,
Above-mentioned rail groove is a plurality of unit intervals part of arranging along above-mentioned rail groove, and comprising along above-mentioned rail groove has periodically a plurality of unit intervals part of the side of displacement,
The side of above-mentioned a plurality of segment part is in single basic cycle displacement, and the form of being distributed by the constituent parts segment part shows the secondary information that the constituent parts segment part is distributed,
The side of constituent parts segment part equates from the basic frequency number, all patterns that variform first and second vibrational waveform is selected, and according to the CD media that these forms are carried out displacement, the method for the above-mentioned secondary information of from then on regenerating,
In the constituent parts segment part, relatively detect the number of times and the number of times that detects above-mentioned second vibrational waveform of above-mentioned first vibrational waveform, by this comparison, decision is allocated in the secondary information of above-mentioned unit interval part.
In desirable embodiment, detect the poor of number of times what first vibrational waveform of above-mentioned unit interval part detected number of times and above-mentioned second vibrational waveform, if in determining scope the time, the secondary information that this unit interval part is distributed is carried out error correction.
In desirable embodiment, based on the signal rising displacement tendency of corresponding above-mentioned vibrational waveform, or the tendency of decline displacement, the kind of detected vibration waveform.
In desirable embodiment, the absolute value and the absolute value that is inclined to that descends that the rising displacement of above-mentioned signal is inclined to compare, thus the kind of detected vibration waveform.
Optical disk reproducing apparatus of the present invention has rail groove, is the CD media along above-mentioned rail groove canned data,
Above-mentioned rail groove is a plurality of unit intervals part of arranging along above-mentioned rail groove, and comprising along above-mentioned rail groove has periodically a plurality of unit intervals part of the side of displacement.
The side of above-mentioned a plurality of unit intervals part is in single basic cycle displacement, and the shape of being distributed by the constituent parts segment part shows the secondary information that the constituent parts segment part is distributed,
All forms that the first and second different vibrational waveform of equal shape is selected are counted from basic frequency in the side of constituent parts segment part, and according to the CD media that these forms are carried out displacement, the device of the above-mentioned secondary information of from then on regenerating comprises:
On above-mentioned CD media, carry out laser radiation, according to the light of above-mentioned CD reflection, from generating the laser head of electrical signal; Generate the regenerating treater of the vibration signal that changes from the above-mentioned vibrational waveform of above-mentioned electrical signal response; With the above-mentioned vibration signal device that the absolute value sample-synchronous rising value of tendency obtains that rises regularly; With the above-mentioned vibration signal regularly absolute value sample-synchronous drop-out value acquisition device of tendency that descends; The more above-mentioned rising value acquisition device and the retention value of drop-out value acquisition device determine the secondary information detection device of secondary information according to the principle of majority opinion.
Optical disk reproducing apparatus of the present invention has rail groove, is the CD media along above-mentioned rail groove canned data; Wherein:
Above-mentioned rail groove is a plurality of unit intervals part of arranging along above-mentioned rail groove, comprises along above-mentioned rail groove, has periodically a plurality of unit intervals part of the side of displacement;
The side of above-mentioned a plurality of segment part is in single basic cycle displacement, and the form of being distributed by the constituent parts segment part shows the secondary information that the constituent parts segment part is distributed;
All forms that the first and second different vibrational waveform of equal shape is selected are counted from basic frequency in the side of constituent parts segment part, according to the CD media that these forms are carried out displacement, and the device of the above-mentioned secondary information of from then on regenerating;
On above-mentioned CD media, carry out and with rayed, according to the light of above-mentioned CD reflection, from generating the laser head of electrical signal; Generate the regenerating treater of the vibration signal that changes from the above-mentioned vibrational waveform of above-mentioned electrical signal response; Stipulate that above-mentioned vibration signal rises regularly, the generating apparatus of the differentiation timing signal regularly of descend timing and above-mentioned secondary information; Detect the first above-mentioned vibrational waveform according to above-mentioned timing signal, calculate the first shapometer counting apparatus that detects number of times; With detect the second above-mentioned vibrational waveform according to above-mentioned timing signal, calculate the second shapometer counting apparatus detect number of times; By the count value that the count value of the first above-mentioned shapometer counting apparatus and the above-mentioned second shapometer counting apparatus draw, the principle that compares according to majority opinion determines above-mentioned secondary information.
Optical disk reproducing apparatus of the present invention has rail groove, is the CD media along above-mentioned rail groove canned data, wherein:
Above-mentioned rail groove is a plurality of unit intervals part of arranging along above-mentioned rail groove, and comprising along above-mentioned rail groove has periodically a plurality of unit intervals part of the side of displacement;
The side of above-mentioned a plurality of segment part is in single basic cycle displacement, and the secondary information of being distributed by the shape performance constituent parts segment part that the constituent parts segment part is distributed;
All forms that the first and second different vibrational waveform of equal shape is selected are counted from basic frequency in the side of constituent parts segment part, according to the CD media that these forms are carried out displacement, and the device of the above-mentioned secondary information of from then on regenerating; Comprising:
On above-mentioned CD media, carry out rayed,, generate the shaven head of electrical signal according to light from above-mentioned CD reflection
Generate the regenerating treater of the vibration signal that changes from the above-mentioned vibrational waveform of above-mentioned electrical signal response;
Stipulate that above-mentioned vibration signal rises regularly, the generating apparatus of the differentiation timing signal regularly of descend timing and above-mentioned secondary information; Detect the first above-mentioned vibrational waveform according to above-mentioned timing signal, calculate the first shapometer counting apparatus that detects number of times;
Detect the second above-mentioned vibrational waveform according to above-mentioned timing signal, calculate the second shapometer counting apparatus that detects number of times;
Count value by the count value of the first above-mentioned shapometer counting apparatus and the above-mentioned second shapometer counting apparatus draw compares the secondary information monitoring unit that determines above-mentioned secondary information according to the principle of majority opinion;
The difference of the count value that is drawn by the count value of the first above-mentioned shapometer counting apparatus and the above-mentioned second shapometer counting apparatus is within specialized range the time, and the elimination detection device of sign is eliminated in output;
According to the output of above-mentioned secondary information detection device and the output of above-mentioned elimination detection device, implementation mistake is corrected, the error correction device of calculated address information.
CD media of the present invention is to have rail groove, and the positional information of physical location of representing above-mentioned rail groove is by the CD media of the vibration shape of above-mentioned rail groove performance, wherein:
Have a plurality of positional information units of arranging on the above-mentioned rail groove,
And each position information unit has the combination of the vibrational waveform of being selected by multiple vibrational waveform, the positional information portion that shows above-mentioned positional information;
The vibrational waveform of above-mentioned positional information portion has the synchronous mark portion of the vibrational waveform of the shape that can discern.
In desirable embodiment, has the accurate witness marker portion that each position information portion elder generation line position is set.
In desirable embodiment, above-mentioned accurate witness marker is configured in above-mentioned positional information unit foremost.
In desirable embodiment, the vibrational waveform of above-mentioned accurate witness marker portion has the shape that can be discerned by the vibrational waveform of above-mentioned synchronous mark portion.
In desirable embodiment, the vibrational waveform of above-mentioned accurate witness marker has the shape that can be discerned by the vibrational waveform in the above-mentioned positional information.
In desirable embodiment, the vibrational waveform of above-mentioned positional information portion comprise have level and smooth sine-shaped first and in the disk Zhou Bianwei and/or towards the periphery displacement, have the second portion of the shape more precipitous than sine wave.
In desirable embodiment, the vibrational waveform in the above-mentioned synchronous mark portion comprises above-mentioned first and/or second portion.
In desirable embodiment, above-mentioned accurate witness marker comprises and is used for pinpoint distinguishing mark.
In desirable embodiment, above-mentioned distinguishing mark is discontinuous by the part of above-mentioned rail groove and mirror flag that form.
In desirable embodiment, above-mentioned mirror flag is configured in 2～4 initial cycles of the above-mentioned vibrational waveform of above-mentioned accurate witness marker portion.
In desirable embodiment, the vibrational waveform of above-mentioned accurate witness marker has sinusoidal waveform.
In desirable embodiment, be arranged in order above-mentioned accurate witness marker portion, above-mentioned positional information portion and above-mentioned synchronous mark portion in the above-mentioned positional information unit.
In desirable embodiment, the storage data block as the least unit of storing comprises that the above-mentioned L of positional information unit (L is a natural number) is individual.
In desirable embodiment, above-mentioned data block is consistent with the data unit that the formation mistake is corrected symbol.
In desirable embodiment, the storage of above-mentioned storage data block begins or finishes after the length in accordance with regulations from the starting point of above-mentioned accurate witness marker.
In desirable embodiment, the storage of above-mentioned storage data block begins or finishes after the mirror flag specified length.
In desirable embodiment, the length of above-mentioned image sign is along rail groove 1 μ m～10 μ m.
In desirable embodiment,, each secondary information unit is distributed above-mentioned one by a secondary information of vibration (M is 2 above natural numbers) performance in M cycle.
In desirable embodiment, the vibrational waveform that above-mentioned synchronous mark portion two aspects of Zhou Bianwei and periphery displacement in the disk have a precipitous rectangle position constitutes in the combination of N (N is a natural number) of M cycle second vibrational waveform repeatedly at M cycle first vibrational waveform and/or level and smooth sine wave oscillations repeatedly.
In desirable embodiment, above-mentioned synchronous mark includes only above-mentioned first vibrational waveform.
The above-mentioned synchronous mark portion of desirable embodiment, first above-mentioned vibrational waveform and the second above-mentioned vibrational waveform are alternatively arranged.
In desirable embodiment, above-mentioned synchronous mark portion is by these two aspects combinations of the change point that comprises the change point that shifts to second vibrational waveform from first vibrational waveform and shifted to first vibrational waveform by second vibrational waveform and constitute.
In desirable embodiment, above-mentioned positional information: the length of A position, above-mentioned synchronous mark: the vibration B cycle, comprise the length of the above-mentioned accurate location division of above-mentioned image sign: the C cycle branch of vibration, the length in 1 cycle of vibration: the W of storage data 1 channel bits doubly, the channel figure place of the storage block of the least unit of storing, regenerating: the D position, be distributed in the above-mentioned positional information units of each storage block: under the situation of E, A, B, C, D, E, M and W are natural numbers, and satisfy formula
D＝(A×M+B+C)×W×E。
In desirable embodiment, B is the multiple of M.
In desirable embodiment, A=48, M=32, B=128, C=8, W=186, E=4.
In desirable embodiment, A=48, M=36, B=144, C=9, W=155, E=4.
In desirable embodiment, A=48, M=24, B=96, C=6, W=186, E=4.
In desirable embodiment, A=48, M=36, B=144, C=9, W=124, E=4.
In desirable embodiment, F=16, M=32, C=8, W=186, P=1, Q=4, R=93.
In desirable embodiment, F=15, M=36, C=9, W=155, P=1, Q=4, R=93.
In desirable embodiment, F=12, M=24, C=6, W=186, P=1, Q=4, R=93.
In desirable embodiment, F=12, M=36, C=9, W=124, P=1, Q=4, R=93.
Positional information renovation process of the present invention is from the renovation process of above-mentioned CD media read-out position information, comprising: the synchronous mark that detects the synchronous mark portion of above-mentioned CD media formation detects step; The accurate witness marker that detects above-mentioned accurate witness marker detects step; Use at least one side who detects the result who detects result and accurate witness marker of above-mentioned synchronous mark, obtain the positional information bit synchronization step of the bit period of positional information; There is above-mentioned positional information bit synchronization step to carry out the positional information regeneration step of positional information regeneration based on bit synchronization.
The date storage method of data of the present invention is in the storage means of the enterprising line data of above-mentioned CD media storage, comprising: what detect the synchronous mark portion that is formed at above-mentioned CD media detects step synchronously; The accurate witness marker that the result detects accurate witness marker that detects based on above-mentioned synchronous mark portion detects step; Use the positioning step that the result positions that detects of above-mentioned accurate witness marker; Carry out the storage that data storage begins by above-mentioned positioning step based on positioning result and begin step.
Optical disk reproducing apparatus of the present invention is the optical disk reproducing apparatus from CD media read-out position information, has following device: the synchronous mark detection device that detects the synchronous mark portion that is formed at above-mentioned CD media; Detect by the synchronous mark of above-mentioned synchronous detection device and regularly to begin to generate the first window generating apparatus that first of stipulated time amplitude detects window through after the stipulated time; Use above-mentioned first window to detect the distinguishing mark detection device of the distinguishing mark of above-mentioned CD media formation; At least use above-mentioned synchronous mark to detect regularly and above-mentioned distinguishing mark detects regularly a kind of, obtain the bit synchronous positional information bit synchronizer of positional information of above-mentioned CD media formation; The bit synchronization timing of corresponding above-mentioned positional information bit synchronizer, the positional information regenerating unit that carries out the regeneration of positional information.
Optical disk storage apparatus of the present invention is the optical disk storage apparatus that carries out data storage from above-mentioned CD media, has following device: the synchronous mark detection device that detects the synchronous mark portion that is formed at above-mentioned CD media; Detect by the synchronous mark of above-mentioned synchronous detection device and regularly to begin to generate the first window generating apparatus that first of stipulated time amplitude detects window through after the stipulated time; Detect the distinguishing mark detection device that window detects the distinguishing mark that is formed on the above-mentioned CD media with above-mentioned first; Detect the starting position of regularly determination data storage or the data storage device of final position from above-mentioned distinguishing mark.
CD media of the present invention is to have rail groove, is the CD media along above-mentioned rail groove canned data,
A plurality of unit intervals part that above-mentioned rail groove is arranged on the above-mentioned rail groove comprises a plurality of unit intervals part that has the side of a plurality of periodicity displacements along above-mentioned rail groove;
The side of above-mentioned a plurality of unit intervals part is to carry out displacement with the common cycle, distributes the shape performance that is dispensed on the constituent parts segment part with the secondary information of constituent parts segment part; And by the CD media of the combination of above-mentioned secondary information performance management information.
In desirable embodiment, above-mentioned management information is stored in non-user area.
CD media of the present invention is to have rail groove, and along the CD media of above-mentioned rail groove canned data, the management information of CD media is by the vibration performance of above-mentioned rail groove.
In desirable embodiment, above-mentioned management information is arranged to show with the combination of the different vibrational waveform of same frequency number vibration.
In desirable embodiment, above-mentioned management information by level and smooth sinusoidal wave position and in the disk displacement of week and/or disk periphery make precipitous rectangle position, the combination that constitutes the vibration shape shows.
CD media of the present invention has rail groove on storage surface, be along the above-mentioned rail groove CD media of data block unit's canned data of length according to the rules, forms the distinguishing mark foremost of each data block unit of expression on above-mentioned rail groove.
In desirable embodiment, write the signal of specific forms on the above-mentioned distinguishing mark.
In desirable embodiment, above-mentioned distinguishing mark is positioned at the central authorities in above-mentioned signal storage zone.
In desirable embodiment, above-mentioned distinguishing mark is positioned at than data block one side before the central authorities of above-mentioned signal storage zone.
In desirable embodiment, above-mentioned distinguishing mark has the flat that blocks above-mentioned rail groove setting.
In desirable embodiment, above-mentioned distinguishing mark comprises a plurality of son signs.
In desirable embodiment, above-mentioned rail groove periodically vibrates, and above-mentioned distinguishing mark is formed by the connection in the different a plurality of zones of the vibration phase of above-mentioned rail groove.
In desirable embodiment, rail groove is arranged to periodically sigmoid curve, it is characterized in that distinguishing mark has the frequency different with the frequency number of above-mentioned sigmoid curve.
In desirable embodiment, the data block unit of the length of afore mentioned rules has a plurality of sub-piece of arranging along group, and the distinguishing mark of above-mentioned sub-piece is arranged within this sub-piece.
In desirable embodiment, periodic sigmoid curve is set in rail groove, distribute the sigmoid curve of the frequency number different in the distinguishing mark of above-mentioned sub-piece with other parts.
In desirable embodiment, the distinguishing mark of above-mentioned sub-piece is positioned at corresponding sub-piece foremost.
In desirable embodiment, the distinguishing mark that is included in the sub-piece in the block unit of afore mentioned rules length shows as the secondary information of the above-mentioned block unit of expression address.
In desirable embodiment, the vibration of above-mentioned rail groove has the pairing shape of information of the above-mentioned block unit of expression address.
Signal storage method of the present invention, be on storage surface, to have rail groove, along the CD media of above-mentioned rail groove with the block unit canned data of specified length, the formed CD media of distinguishing mark foremost for each the data block unit that on above-mentioned rail groove, represents, the signal storage method of storage signal, the signal that should store will begin storage from the front of the distinguishing mark foremost that is positioned at a data block unit at least, the above-mentioned signal that should store at least the distinguishing mark of the afterbody that is positioned at a data block unit by after stop storing.
Signal storage method of the present invention, be on storage surface, to have rail groove, along the CD media of above-mentioned rail groove with the block unit canned data of specified length, the distinguishing mark of formation foremost of each the data block unit that represents on the above-mentioned rail groove, CD media for a plurality of sub-pieces that comprise each distinguishing mark, the signal storage method of storage signal, begin storage foremost after the signal that should store will detect from the initial sub-piece that comprises that is positioned at a data block unit at least, the above-mentioned signal that should the store last child sign that distinguishing mark comprised at the end that is positioned at a data block unit at least detects back termination storage.
In desirable embodiment, write the signal of specific forms on the above-mentioned distinguishing mark.
In desirable embodiment, above-mentioned particular form signal is VFO.
Description of drawings
Figure 1A is the top view of CD media of the present invention.
The top view of the rail groove flat shape of Figure 1B, CD media of the present invention
Fig. 2 (a) is the vertical view of expression vibration key element, and Fig. 2 (b) is the vertical view of four kinds of vibrational waveforms of the above-mentioned key element formation of combination.
Fig. 3 A is the vibration according to rail groove, based on the amplitude of variation of vibration signal, can discern the figure of basic comprising of device of the kind of vibrational waveform.
Fig. 3 B is the oscillogram of vibrational waveform, vibration signal and the pulse signal of expression rail groove.
Fig. 3 C separates pulse signal from vibration signal, and the circuit of clock signal constitutes synoptic diagram.
Fig. 4 is the main position pie graph of embodiment 1 CD media.
Fig. 5 is the pie graph of embodiment 2 optical disk reproducing apparatus.
Fig. 6 is the pie graph of embodiment 3 optical disk reproducing apparatus.
Fig. 7 is the key diagram of embodiment 4 optical disk reproducing methods.
Fig. 8 is the pie graph of embodiment 5 optical disk reproducing apparatus.
Fig. 9 is the detailed maps of embodiment 5 vibration shape detection devices.
Figure 10 is the main position pie graph of embodiment 6 CD media.
Figure 11 A and Figure 11 B are about the key diagram of storage signal in the method for VFO storage area 21.
Figure 12 is the main position of embodiment 7 a CD media pie graph.
Figure 13 is the main position of embodiment 8 a CD media pie graph.
Figure 14 A and Figure 14 B are the key diagrams of embodiment 8 signal storage methods.
Figure 15 is the main position of the CD media in the embodiment 9 pie graph.
Figure 16 is the main position of the CD media in the embodiment 10 pie graph.
Figure 17 is the main position of the CD media in the embodiment 11 pie graph.
Figure 18 is the main position of the CD media in the embodiment 12 pie graph.
Figure 19 is the formation picture of device from CD media playback of data block signal and address signal of embodiment 12.
Figure 20 is the pie graph of the secondary information of CD media in the embodiment 13.
Figure 21 is the pie graph of the secondary information of CD media in the embodiment 14.
Figure 22 is the pie graph of the secondary information of CD media in the embodiment 15.
Figure 23 is secondary each the bit representation detail drawing of information of the CD media in the embodiment 16.
Figure 24 (a)～(b) is the pie graph of the CD media in the embodiment 16.
Figure 25 is that the CD media in the embodiment 16 constitutes synoptic diagram.
Figure 26 A～Figure 26 D is the synoptic diagram of the CD media rail groove pattern in the embodiment 16.
Figure 27 is the synoptic diagram of the accurate witness marker of the CD media in the embodiment 16 portion.
Figure 28 A～Figure 28 E is the synoptic diagram that the CD media synchronous mark portion in the embodiment 16 constitutes.
Figure 29 is the pie graph of the CD media recording/reproducing in the embodiment 17.
Figure 30 A～Figure 30 E is the key diagram that the storage in the embodiment 18 begins/finishes and its mirror position concerns.
Figure 31 A～Figure 31 C be in the embodiment 18 storage data standard form list figure.
Figure 32 (a)～(c) is that the relevant storage means in position that the storage in the embodiment 18 begins/finishes lists figure.
Figure 33 is the process flow diagram of the data stream of the positional information Regeneration Treatment example in the expression embodiment 18.
Figure 34 is the process flow diagram of the data stream of the positional information Regeneration Treatment example in the expression embodiment 18.
Figure 35 is the process flow diagram of the data stream of the data storage processing example in the expression embodiment 18.
Figure 36 is that the CD media in the expression embodiment 18 constitutes synoptic diagram.
Figure 37 A～Figure 37 E is about embodiment 19, management information storage form and other list figure.
Figure 38 is the synoptic diagram of the embodiment of 4 positional informations that positional information unit is comprised separately comprising in a positional information section 403, management information.
Figure 39 is by can the regenerate optical disc storage regenerating unit pie graph of stored management information of the vibration signal of rail groove.
Embodiment
The storage surface 1 of CD media of the present invention is shown in Figure 1A, and rail groove 2 forms spiral fashion.Figure 1B is that the part of rail groove 2 enlarges later synoptic diagram.The disk center that in Figure 1B, does not have to show below figure, radially the representing of disk by arrow a.The laser spots that arrow b is illustrated in the storage/regeneration that forms on the disk is followed the moving direction of disk rotation.In this instructions, the direction parallel with arrow a is called radially (radius) of disk, and the direction parallel with arrow b is called orbital direction.
On the coordinate system of the fixing luminous point that forms on the disk, by the disk segment of light beam irradiates (disk irradiation portion), move to the opposite direction of arrow.
Here, shown in Figure 1B like that, we consider the coordinate of X-Y earlier.On CD of the present invention, Y coordinate position cyclical variation of the 2a of rail groove side, 2b along with the increase of X coordinate.The periodic position displacement of such rail groove side 2a, 2b is referred to as the vibration of rail groove 2, perhaps is called vibration.Displacement to arrow a direction is referred to as the displacement of disk outer circumferential side, is referred to as Zhou Bianwei in the disk to the reciprocal displacement of arrow a.Among the figure, the vibration one-period represent with T.The frequency number of vibration and the one-period of vibration are inversely proportional to, and are directly proportional with the linear velocity of light beam spot on the disk.
Example shown in the figure, the amplitude of rail groove 2 is the same along orbital direction (arrow b).
Therefore the position of side 2a, the 2b of rail groove 2 is the same to the center (setback line) of the addendum modification of disk radial (arrow b) and rail groove 2 to the addendum modification of disk radial.Therefore below, the disk radial displacement of rail groove lateral location is shown as rail groove displacement or rail groove vibration simply.But the center of rail groove 2 of the present invention and side 2a, the 2b of rail groove 2 not only are defined in the situation of the identical vibration of disk radial.The amplitude direction along ng a path of rail groove 2 change also can, the center of rail groove 2 does not vibrate has only the vibration of rail groove side also passable.
The vibration structural specifications of rail groove 2 of the present invention is combined by the displacement form of a plurality of kinds.The flat shape that is to say rail groove 2 is not only shown in Figure 1B and is made up of single sine wave, at least some and sinusoidal wave different shape part.The basic comprising of such vibration group is illustrated in patented claim (special hope 2000-6593 number, special hope 2000-187256 number and spy are willing to 2000-319009 number) by applicant.
About the rail groove 2 of Figure 1B, the Y coordinate at rail groove center is with the function f of X coordinate.When form (x) is represented, f.(x) such as representing with constant * SIN (2 π x/T).
Following with reference to Fig. 2 (a) and the formation that (b) describes the vibrational waveform that adopts in the present invention in detail.
Fig. 2 (a) has represented to constitute four kinds of fundamentals of the vibrational waveform of rail groove 2.At Fig. 2 (a), level and smooth sine wave 100 and 101 have been represented, to the square wave part 102 of the precipitous displacement of disk peripheral direction and the square wave 103 of the precipitous displacement of Zhou Fangxiang in disk.By the combination of these key elements, four kinds of vibrational waveforms 104～107 shown in Fig. 2 (b) have been formed.
On the CD of reality, the disk radial displacement of rail groove is vertically realized it being difficult to orbital direction, therefore surely not form complete square wave.So the words that the edge shape of the square wave of actual CD is more precipitous relatively than the displacement at sinusoidal wave position are just passable, there is no need is complete square wave.Can see clearly from Fig. 2 (b), finish in time of 1/2 of vibration period in the displacement of sine wave part from interior all sides to the most peripheral side.Approximately finish below 1/4 in the vibration period in the same displacement of square wave part, the waveform of then such shape difference can be detected fully.
In addition, Zhou Fangxiang displacement rectangle is its feature in the vibrational waveform 106, and the feature of vibrational waveform 107 is that ' interior Zhou Fangxiang displacement rectangle ' adds peripheral direction displacement rectangle.
About vibrational waveform 105～107, adopt the coordinate system of Figure 1B, represent the Y coordinate of orbit centre in the mode of the function of X coordinate, then these functions can launch with the Fourier series.The item (radio-frequency component) that in the Fourier series that launches, comprises the Sin function shorter than the vibration period of Sin (2 π X/T).But all vibrational waveforms all have the basic waveform composition.This instructions claims that the frequency number of basic waveform is the vibration frequency number.4 kinds of above-mentioned vibrational waveforms have common vibration frequency number.
The present invention by vibration frequency is carried out frequency modulation, replaces writing address information to rail groove 2, and the combination by above-mentioned multiple vibrational waveform can be stored the various information that comprise address information to rail groove.Specifically, distribute any one of above-mentioned 4 kinds of vibrational waveforms 104～107 in the regulation interval of each rail groove, such as storing four symbols such as ' B ' ' S ' ' 0 ' and ' 1 '.Here, ' B ' expression block message, ' S ' represent synchronizing information.' 0 ' and ' 1 ' and by their combination table current address numbering error detection symbol or the like.
Secondly with reference to Fig. 3 A and Fig. 3 B, explanation vibration by disc tracks groove of the present invention, the basic skills that canned data is regenerated.
At first, with reference to Fig. 3 A and Fig. 3 B.
Fig. 3 A is the synoptic diagram of regenerating unit major part, and Fig. 3 B is the synoptic diagram of rail groove and regenerated signal relation.
Fig. 3 B is for the rail groove 200 of modular form ground expression, and scanning is regenerated with the luminous point of laser beam 201 in the direction of arrows.Laser beam 201 forms reflected light 202 from CD reflection.Reflected light 202 is accepted by the detecting device 203,204 of the regenerating unit shown in Fig. 3 A.Detecting device 203,204 distributes by the direction of corresponding disk radius, separately according to the light intensity output voltage that receives.To a certain side displacement of certain distribution locations of irradiation position (light receiving position) between detecting device 203 and detecting device 204 of detecting device 203,204 reflected light 202, difference (differential recommending detects) appears in the output gap of the output of detecting device 203 or detecting device 204.Detecting device 203,204 output to differential circuit 205, carry out subtraction at differential circuit 205.The vibration shape that its result tackles rail groove 200 obtains signal 206 (vibration signal).Vibration signal 206 carries out differential and handles to Hi-pass filter (HPF) 207 inputs in Hi-pass filter (HPF) 207.As a result, the level and smooth basis that is included in the vibration signal 206 is attenuated, and obtains having the pulse signal 208 with corresponding pulse composition of precipitous inclined rectangular part.As can be seen from Figure 3B, each pulse polarity of pulse signal 208 depends on the direction of the precipitous displacement of rail groove 200.Therefore can discern the vibrational waveform that rail groove 200 is held from pulse signal 208.
Secondly, with reference to Fig. 3 C.Fig. 3 C is the synoptic diagram that the circuit of the vibration signal 206 production burst signals 208 represented from Fig. 3 B and clock signal 209 constitutes example.
In the formation example of Fig. 3 C, vibration signal 206 is input among the first bandpass filter BPF1 and the second bandpass filter BPF2.The first bandpass filter BPF1 and second bandpass filter BPF2 production burst signal 208 and clock signal 209 separately then.
If as Fw (Hz), the first bandpass filter BPF1 is to be that the wave filter of the peak value of gain (transmitance) constitutes by having frequency number with 4Fw～6Fw (such as 5Fw) the vibration frequency number of track.By such wave filter from low frequency to the crest frequency number such as being 20dB/dec, gain is risen and is entered the zone also higher than crest frequency number (such as 60dB/dec) rapidly, wishes that gain can reduce.The first bandpass filter BPF1 can from vibration signal 206 suitably generate the expression track vibration rectangle changing unit pulse signal 208.
On the other hand, the second bandpass filter BPF2 has (such as contain the bandwidth that vibration frequency is counted 0.5Fw～1.5Fw at the center) gain height with the frequency number bandwidth of regulation, and the less characteristic that when other frequency number, gains.The second bandpass filter BPF2 like this, the sine wave signal of frequency that can generate the vibration frequency number with respective carter is as clock signal 209.
Below describe the embodiment of CD media of the present invention in detail.
On the storage surface 1 of the relevant CD of present embodiment, also shown in Figure 1A, form spiral helicine rail groove 2.
What Fig. 4 represented is the shape of present embodiment rail groove 2.Rail groove 2 is divided into a plurality of data blocks, is provided with the block mark (distinguishing mark) 210 as positioning action between piece and the piece.Block mark 210 in the present embodiment forms the rail groove disjunction.
The difference of vibrational waveform as described above, shows as the difference that is detected the rise and fall limit inclination of the regenerated signal that obtains by differential circuit.So, be vibrational waveform 105 or the vibrational waveform 106 of Fig. 2 A such as the vibrational waveform of unit interval 22, all can be easy to identification.As previously mentioned, carry out the above-mentioned operation that detects, increased the noise composition by differential to regenerated signal.Therefore when using the lower high-density CD medium of SN, may produce and detect mistake.For fear of detecting wrong generation, present embodiment has adopted the technology of following explanation.
The information (to call canned data in the following text) that should write by the user, be divided into a plurality of data blocks, write accumulation layer along rail groove.Canned data to write with piece 210 be starting point, be that unit carries out with the piece that extends specified lengths (such as the 64K byte long) along rail groove 2.Such piece is the unit in the information processing, such as being expressed as the ECC data block.Piece contains N (N is a natural number) height piece.Piece is the 62K byte, and when sub-piece was the 2K byte, the number N of the sub-piece that comprises in piece was exactly 32.
In the present embodiment, the zone that the information of each sub-piece is written on the rail groove is corresponding to the unit interval 22,23 of rail groove.
Because unit interval 22,23 has been stored a secondary information 0 or 1 respectively, the secondary information of N=32 in each piece (position) is assigned with.The address of representing this piece in the present embodiment by this secondary message block of 32.
Such as being 2418 bytes (=2048 bytes+parity code) with constituent parts length of an interval degree, suppose that a vibration period length is equivalent under the situation of 11.625 bytes, the constituent parts interval just includes the vibrational waveform in 208 cycles.Its result vibration signal 206 shown in Fig. 3 B and Fig. 3 C is detected during the cycle branch (208 wave number) of vibration 208, as long as it is just passable to discern the kind of vibrational waveform.Therefore detect mistake even some take place during signal regeneration, also can correctly differentiate secondary information.
More particularly, such as the differentiated waveform (pulse signal 208) of differential push-pull signal to its each rising, the preservation of taking a sample descends.Then rising number of times and decline number of times accumulated value are separately compared, do like this,, can accurately extract the composition of secondary information out owing to removed the noise composition.
In addition, the block mark 210 of Fig. 4 is that disjunction rail groove 2 is provided with, and therefore some problems will take place the accumulation layer written information on block mark 210.That is to say that catoptrical amount alters a great deal by the having or not of rail groove, the effect of interference is played in the existence of block mark 210 to regenerated signal.So in the zone 21 of the specified length that comprises block mark 210, distributed VFO (Variable Frequency Oscilator) storage area 21 in the present embodiment.So-called VFO storage area 21 is zones that single-frequency is counted signal VFO storage, and VFO is the PLL signal for necessity of the regeneration introducing of canned data.If vfo signal even there are some to disturb change, the shake of some parts takes place just also, can not produce mistake.Because vfo signal is the repeated signal of single-frequency number, can isolate interference in addition by block mark.Even if being stored in the signal of VFO21 storage area is not the single-frequency number, the signal of block mark 210 also can so long as can separate the specific waveform signal of very narrow spectral bandwidth.
Illustrate that with reference to Fig. 5 embodiment 1 has the optical disk reproducing apparatus of the address regeneration function of CD media.
The laser beam irradiation that sends from this regenerating unit laser head 331 forms luminous point on the rail groove of CD 1 on CD 1.Drive system control luminous point follows being rotated on the rail groove of CD to move.
Be input to block mark detecting circuit 334. from the full additive signal of read signal processing circuit 332 outputs.Block mark detecting circuit 334 detects the position of block mark 210 from full additive signal.On the CD of embodiment 1, the laser intensity of the partial reflection that forms from block mark 210 is than other part height.When therefore read signal processing circuit 332 surpasses the level of full additive signal regulation, generate the block mark detecting signal, pass out to timing signal generation circuit 335..
Timing signal generation circuit 335 is counted clock from the position foremost of piece based on above-mentioned block mark detecting signal and clock signal.By this counting, rising timing, descend timing, the timing of secondary information segmenting and the timing of piece segmentation of vibration signal just can determine.
The inclination setting U of vibration signal when the first shape counting circuit 336 rises to vibration signal in each unit interval
THThe number of times that more than reaches is counted.Specifically push-pull signal be tilted in the rising of vibration signal the time, at setting U
THAbove, then only on count value C1, add 1, if discontented U
TH, count value C1 remains unchanged.When rising, stipulates vibration signal by the output signal of timing signal generation circuit 335.
The inclination of vibration signal reached setting D when the second shape counting circuit 337 descended to vibration signal in each unit interval
THAbove number of times is counted.Specifically push-pull signal be tilted in the decline of vibration signal the time, at setting D
THWhen following, then only on count value C2, add 1, if surpass D
TH, count value C2 remains unchanged.When descending, stipulates vibration signal by the output signal of timing signal generation circuit 335.
Secondary information detecting circuit 338 is based on the subregion timing signal of the secondary information of timing signal generation circuit 335 generations, relatively the count value C1 of the first shape counting circuit 336 and the count value C2 of the second shape counting circuit 337.If certain unit interval C1 〉=C2 sets up, just,, just export ' 0 ' as the secondary information in this unit interval if C1＜C2 sets up as the secondary information output ' 1 ' in this interval.In other words, each unit interval determines the kind of vibration signal with the form of majority vote.
339 pairs of error correction circuits are distributed in the secondary information that a data block comprises a plurality of unit intervals and carry out error correction, refresh address information.
Each above-mentioned circuit there is no need independent separately forming circuit, and the key element of some circuit can be general in a plurality of circuit.And, a storer of write-in program is in advance arranged, can the control figure signal processor according to this program, also can by the function of its executive circuit.This is equivalent to the function of the following various embodiments that will illustrate.
Other embodiment of optical disk reproducing apparatus of the present invention is described with reference to Fig. 6.The address regenerating unit of the optical disk reproducing apparatus of present embodiment and embodiment 4 compares, and its difference is to have the detecting circuit of wiping 340, and the function of error correction circuit 339 is also different.Except these differences, the device of present embodiment is identical with the device of embodiment 2, so just do not repeat explanation about two common formations of embodiment.
Wiping detecting circuit 340 compares the count value C1 of the first shape counting circuit, 336 outputs and the count value C2 of the second shape counting circuit, 337 outputs in the constituent parts interval.To the value E of defined ,-E＜C1-C2＜+when the relational expression of E is set up, as the ambiguous differentiation of secondary information, output ' 1 '.And-E＜C1-C2＜+when the relational expression of E was false, diagnostic criterium ' 0 ' was wiped in output.
Present embodiment is eliminated wrong position by such sign of wiping, so but the error correction figure place of error correcting code is original 2 times.And as wiping sign, C1-C2≤-output ' 0 ' during E ,-E＜C1-C2＜+export during E " X ", output ' 1 ' also can during+E≤C1-C2.At this moment, be ' X ', also can implement error correction forcibly if wipe zone bit.
As mentioned above, very little by the optical disk reproducing apparatus of present embodiment to the difference of the first shapometer numerical value and second shape counting circuit values, when being difficult to accurately judge secondary information, eliminate that position in error correction procedure, can improve error correcting capability, more reliably refresh address.
The address renovation process of CD media of the present invention is described with reference to Fig. 7.
On the top of Fig. 7, modular form ground expression vibration shape 351.The displacement that descends of the left half of vibrational waveform 351, the right half displacement of rising precipitously precipitously.
Showed vibration signal 352 quality decline of push-pull signal by the distortion of noise, waveform.
The signal 353 of binaryzation is the signal that vibration signal 352 cuts out at the zero level place.Differential signal 354 is that vibration signal 352 is carried out the signal that obtains behind the differential.Differential signal 354 has the inclination information of vibrational waveform.Detect beyond the sloping portion of displacement point, also showed peak value by noise, wave form distortion.
In order to oversimplify, describe with regard to the first arbitrarily 355 and the second portion 356 of vibration signal.
In the first 355 of vibration signal, the absolute value of the sampling value 358 of the differential signal 354 of the absolute value of the sampling value 357 of the differential signal 354 on the rising edge edge of two-value signal 803 and drop edge is compared.Because the absolute value of sampling value 358 is bigger, just can determine the vibration signal that first 355 comprises, relatively the displacement of its trailing edge of displacement of rising edge has more precipitous vibrational waveform.
Equally, in the second portion 356 of vibration signal, the absolute value of the sampling value 360 of the differential signal 354 of the absolute value of the sampling value 359 of the differential signal 354 on the rising edge edge of two-value signal 803 and drop edge is compared.Because the absolute value of sampling value 359 is bigger, just can determine the vibration signal that second portion 356 comprises, relatively the displacement of its rising edge of displacement of trailing edge has more precipitous vibrational waveform.
Each cycle that is identified in so all carries out, and the result of identification adds up, and can carry out most principles of differentiating in the secondary information unit thus.
So, address of the present invention renovation process is exactly to the edges of signals of vibration signal binaryzation differential signal sampling and sampling value relatively regularly.Its result detects the inclination of the displacement point of vibrational waveform, even noise, wave form distortion are arranged, also can detect to high reliability.
Embodiment 5
With reference to Fig. 8 explanation from CD of the present invention can refresh address other optical disk reproducing apparatus.
The difference of the regenerating unit of present embodiment and the regenerating unit of Fig. 5 is that the device of present embodiment has vibrational waveform testing circuit 361.Whether the rising displacement that vibrational waveform testing circuit 361 all will be discerned vibrational waveform in each vibrational waveform cycle is the first precipitous shape, and whether the decline displacement is the second precipitous shape, to secondary information detecting circuit 338 output vibrational waveform shape informations.Secondary information detecting circuit 338 is based on the vibrational waveform shape information that obtains from the vibrational waveform circuit, and the decision shape detects several most shapes.Identification is distributed in the secondary information of noticeable secondary information unit then, and output.
Secondly, describe the operation of vibrational waveform detecting circuit 361 in detail with reference to Fig. 9.
Vibrational waveform detecting circuit 361, accept push-pull signal (vibration signal), have the BPF (bandpass filter) 362 that can lower the unnecessary noise composition, this BPF362 can allow the basic waveform frequency number composition of vibration signal and the radio-frequency component with vibrational waveform inclination information pass through.The basic frequency number of vibration signal is decided to be Fw, and the variation edge of considering linear velocity preferably uses the bandpass filter of the bandwidth with 1/2Fw～5Fw.
The output of BPF362 is to inclination detecting circuit 363 and binarization circuit 365 inputs.
Circuit for reversing 904 reverses the output of inclination detecting circuit 363 to 0 level, obtain circuit 367 outputs to rising value.
Binarization circuit 905 detects the zero crossing timing and the zero crossing timing that descends of the rising of vibration signal.Regularly to be vibration signal be indexed to the timing of ' H ' level from ' L ' level to the zero crossing that rises, and the decline zero crossing regularly is vibration signal is indexed to ' L ' level from ' H ' level timing.
The rising zero crossing that 366 pairs of binarization circuits 365 of circuit detect of the obtaining rising value inclination of output of detecting circuit 363 preservation of taking a sample of regularly tilting.Equally, drop-out value obtains circuit 367, the inclination (counter-rotating of tilting value) of the output of the inclination circuit 364 of the rising zero crossing that binarization circuit 366 is detected in the regularly preservation of taking a sample.
Here, the rising value value that obtains circuit 366 sampling is the inclination when rising, so be on the occasion of.And drop-out value to obtain the value of circuit 367 sampling be the reverse value of inclination that descends, also be on the occasion of.That is to say that rising value is obtained value that circuit 366 and drop-out value obtain circuit 367 samplings and all is equivalent to the absolute value that tilts separately.
Obtain 369 pairs of rising values of comparator circuit absolute value that rising that circuit 366 sampling preserves regularly tilts and drop-out value obtain the absolute value that decline that circuit 377 samplings preserve regularly tilts and compare with vibration decline zero crossing delay circuit 368 official hour delay timings regularly, if the value of rising value detecting circuit 366 is big, as first shape, if not so, as second shape output vibration shape information.That is to say as long as, just can carry out detecting of certain vibrational waveform by the most certain (differential value maximum, minimum) the rising zero crossing of the inclination information of vibration signal regularly being tilted and the comparison of the inclination of decline zero crossing timing.
And, in the present embodiment, same signal is imported in binarization circuit 365 and the tilt detection circuit 363, but the present invention does not limit this.For the zero crossing that detects vibration signal more accurately regularly, it is also passable by LPF (low-pass filter) BPF362 to be input to binarization circuit 365.And, can prepare two kinds of BPF as BPF362, the BPF that will have a different qualities distributes to inclination detecting circuit 363 and binarization circuit 365 is also passable.At this moment, in order to make phase place unanimity, wish to be provided with in addition one and postpone interpolation circuit by the vibration signal of each BPF.
Like this, by the optical disk reproducing apparatus of present embodiment, in zero crossing timing with secondary information vibration signal, the inclination of vibration signal is preserved in sampling, compare that save value, can carry out the identification of vibrational waveform really by doing like this, can reduce because the mistake of the secondary information that noise causes detects.
Embodiment 6
What Figure 10 represented is the formation that block mark 210 is configured in the central authorities of VFO storage area 21.And in the example of Figure 10, square wave forms in VFO storage area 21, but the present invention is not limited to this form.
Here with reference to Figure 11 A and Figure 11 B, just the method for signal storage in VFO storage area 21 described.Figure 11 A and Figure 11 B, in order to simplify, omitted the record that is formed at the vibrational waveform in the rail groove 2.
Figure 11 A, be illustrated on the rail groove 2 situation that storage is equivalent to a data block.The storage signal of a data block unit comprises data (DATA) 202 and VFO202,203.
The storage of each piece is from VFO201.The VFO202 of present embodiment is stored in the VFO zone 21, and the storage starting position of VFO202 is near block mark 210.After the storage VFO202, the DATA202 of a piece of storage stores VFO203 at last.VFO203 is stored in the VFO zone 31, and the storage final position of VFO203 is at the rear of block mark 210.That is to say present embodiment be positioned at storing predetermined zone block mark foremost near the storage of start information, the storage of termination message after the block mark at the end by being positioned at above-mentioned zone.
When the central authorities of block mark 210 begin data storage, the part that block mark 210 exists, the quality of storage film produces significantly and descends.The block mark 210 of present embodiment is blocked rail groove 2 and is provided with, and therefore has the part of block mark 210, and it is poor to produce section on the rail groove.When having the part canned data of stage difference, when storage film canned data,, must give high-energy such to illuminated portion because irradiation has high-octane laser on the storage film.
Front and back in the zone of laser beam irradiation produce big temperature difference.Such temperature difference produces stress on the storage film.The part that produces at stress exists above-mentioned section difference may make generation be full of cracks such as storage film.When producing be full of cracks on the storage film, owing to can make be full of cracks enlarge the damage that finally may cause storing film in the storage repeatedly.
In the present embodiment,, be provided with the zone that does not have block mark 211 in the beginning of storage and the position of termination in order to prevent such damage.
VFO is pre-prepd spacing wave for data reproduction.At the vfo signal regeneration period data section level is carried out FEEDBACK CONTROL to the regenerated signal center,, pin PLL for further clock extraction.For playback of data verily, must correctly carry out the binaryzation of regenerated signal and clock regularly.If the vfo signal time is too short, during the regeneration beginning, PLL does not also fully pin, and piece data foremost just might make a mistake.Therefore VFO requires from beginning storage near the block mark, and guarantees sufficient zone length.
If stored data on the piece, shown in Figure 11 B, these VFO that stored piece may repeat to write at the last branch of piece VFO of going ahead of the rest in advance.The part of the vfo signal of having stored in this case, is erased.And former VFO may be also asynchronous with the phase place of the VFO that writes up.Therefore, it is inadvisable to pin the practice of PLL of later piece with the VFO of in advance piece.
More than we narrate with regard to the storage starting position of VFO, about the storage film deterioration, the data storage final position is set up too.It is back for well that but the final position of storage is placed near the block mark 310.
If the storage final position is placed near the block mark 310, may produce the interval between this piece and the follow-up piece.This gap, the rayed of high energy less than, be the zone that can't form sign.Identical with difference in height, these gaps may become the reason of storage film deterioration.The VFO at the end of the piece of storage foremost and the VFO foremost of the piece of storage later on are piled up.VFO's is overlapping shown in Figure 11 A, with the starting position of VFO storage be set in block mark 210 near, simultaneously the storage final position of VFO is set in formation after the block mark 310.
The interval of block mark position and VFO storage starting position/final position is preferably disposed on the position more than 10 times of the light beam spot of the laser that is used to store.The diameter of laser spots be by Wavelength of Laser divided by NA value decision size, so the laser of illumination wavelength 650nm is when using the optical head of NA0.65, the diameter of the laser beam spot on the disk is 1 a μ m (=wavelength/NA).At this moment be preferably in the position of leaving more than the block mark 10 μ m storage starting point or storage terminating point are set.But 10 times of these standards of laser spots can be revised according to the characteristic (particularly heat preach rate) of storage film and obtain.
And when the front of block mark 210 began to store, this block mark can't detect at the end.Therefore for correctly from beginning storage near the block mark, a method be arranged, infer the position that fast sign in advance.Such as beginning clock number is counted from above-mentioned clock signal after the block mark that detects predecessor block, when reaching the clock number of regulation, begin to store the VFO of next piece.
Embodiment 7
The CD media of present embodiment is described with reference to Figure 12.Above-mentioned embodiment, block mark 210 are arranged on the rough central authorities of VFO storage area 21, but in the present embodiment, as shown in Figure 2, block mark 211 also wants a side of predecessor block to form in the central authorities than VFO storage area 21.By such constituting, can guarantee longer than VFO foremost.
With reference to Figure 13, Figure 14 A and Figure 14 B, the CD media of present embodiment is described.
The block mark 210 of present embodiment is made up of child sign 210a and son sign 210b.Be made of this, the timing ratio of storage is easier to.That is to say that owing to forms piece can indicate 210a also detect before do not begin store after the sign 210b of part detects foremost by two signs.And the termination of storage, can after detecting, second sign of the part foremost that is positioned at next piece 210a carry out.
So, the detection time point from the block mark of predecessor block there is no need block count, also can accurately determine the storage starting position.
And, sign 210A and the interval that indicates 210B should be set enough widely in order to prevent to store the deterioration of film.Specifically storage starting position and positioned at intervals luminous point about 10 times or more of sign 210A with sign 210B, the interval that for this reason indicates 210A and sign 210B preferably is set at light beam spot about more than 20 times for well.When the light beam spot on the CD was 1 μ m, it is above for well that above-mentioned interval is set at 20 μ m.
Embodiment 9
With reference to Figure 15, the CD of present embodiment is described.All all are to block rail groove 2 to form the block mark 210 of making in the above-mentioned embodiment.The intercepted part of such rail groove does not form rail groove, so be flat, is called ' minute surface sign '.The minute surface sign can be with high reflectivity reflective regenerate light, therefore detects to be easy to.But in the present embodiment, do not adopt the block mark of minute surface sign, adopted block mark 218 in other schemes.Below block mark 218 is elaborated.
In the present embodiment, as shown in figure 15, allow the phase place of vibration of rail groove reverse in VFO storage area 21, the part that this phase place is produced counter-rotating is used as block mark 218.
As previously mentioned, block mark 210 bearing accuracies of minute surface sign are very high, have the advantage that detects easily, when SN ratio hangs down, have the wrong problem that detects remarkable increase.To this, allow the front and back of block mark 218 reverse the words that vibration phase forms rail groove, suppose change point (block mark 218) owing to reason vibration phases such as noises, and, also can detect the block mark of passing through at certain time point by observing the block mark 218 later vibration phases that pass through under its situation that can not detect.
Embodiment 10
With reference to Figure 16 other embodiments of CD of the present invention are described.In the present embodiment, two block mark 218A and 218B are set in each VFO storage area.This block mark 218A and 218B are formed by the vibration phase counter-rotating of rail groove.
The main difference of the embodiment of present embodiment and Figure 15 is that the inverted population of the vibration phase that forms of each interblock have plenty of odd number and have plenty of even number.Vibration phase is reversed in when producing one time in each VFO storage area 21 (odd number number of times) as shown in figure 15, the phase place of the vibration that the position that its phase reversal produces is later does not arrive this section through next block mark, the phase place for the predecessor block vibration is to keep the state of counter-rotating usually.Its result PLL from the vibration of rail groove extracts clock synchronously out, work like this, and the reversal of poles of PLL phase bit comparison output is so slippage takes place in PLL.Therefore as shown in figure 15, the phase reversal number of times of vibration is if odd number, behind the passing through of block mark, must allow the reversal of poles of PLL.
To this, in the present embodiment for the phase place (218A) of once reversing is reversed (218B) once more, for the phase place of the phase place predecessor block that vibrates and same phase place are returned the polarity of the PLL that need not reverse.
The interval of block mark 218A, 218B in each VFO storage area 21 must be more longer than the measurable fault noise that arrives.If but this is also longer than the response time of PLL at interval, the probability that above-mentioned slippage takes place will increase.Consider above various situations, the interval of block mark 218A, 218B in each VFO storage area 21 is considered optimum in 3～10 times of degree of vibration frequency number.
And it must be 2 that the number of block mark 218A, 218B in each VFO storage area 21 does not limit, so long as even number just can be received the effect that present embodiment is same.But forming block mark 218A, 218B more than 4 in limiting length range, is bad from the viewpoint of integrated level.
In the above-mentioned embodiment 4 and 5, by making the counter-rotating of vibration phase, form block mark, as long as can detect the variation of phase place, there is no need to make phase differential before and after the block mark just in time is 90 degree.The position of block mark is at the vibration phase that changes preferably in the scope, such as being 45～135 degree.
Embodiment 11
Secondly, with reference to Figure 17, present embodiment 6 is described.
The difference of present embodiment and above-mentioned embodiment is the formation of block mark 219.The block mark 219 of present embodiment is by the vibration regulation of the different frequency number of the vibration frequency number of the rail groove that is positioned at piece inside.In the example among the figure, the vibration frequency number of block mark 219 is counted height than the vibration frequency of piece inside.So use processing regenerated signals such as bandpass filter, as long as separate, discern the different signal of vibration frequency number partly, just can detect the position of block mark 219 accurately thus.
The CD media of present embodiment, block mark 219 also forms in the VFO records area, and the VFO data also are written in the zone of block mark 219 existence.
The vibration frequency number of block mark 219 preferably is set in more than 1.2 times below 3.0 times in this scope of piece internal vibration frequency number, if can be set in more than 1.5 times below 2.0 times in this scope then better.The vibration frequency number of block mark 219 and the vibration frequency number of piece inside too near the time, detect block mark 219 become the difficulty.When the vibration frequency number of the vibration frequency number of if block sign 219 and piece inside relatively uprised on the other hand, because approaching with the frequency number of storing the signal that writes on the film, two signals interfered with each other, and also are bad.
And between the piece, preferably the vibration frequency number in the region unit beyond block mark 219 and the vibration of same frequency are formed.Vibrational waveform between the piece is preferably different with the vibrational waveform in the piece.Group in the example shown in Figure 17 between the piece is S shape as drawn sine wave curve.
Embodiment 12
Secondly, with reference to Figure 18, embodiment of the present invention 7 is described.
In the present embodiment, do not use the shape of amplitude, frequency number or phase change partly, with all using of sinusoidal wave such sigmoid curve group of being drawn as block mark as block mark.And the part foremost of each sub-piece 221,222 is provided with the vibration 228,229 of change frequency number partly.
Like this, have the zone of the vibration frequency different,, can suitably detect the border of sub-interblock thus definitely in the configuration foremost of each sub-piece with the basic frequency of vibration.In the above-mentioned various embodiments, the position of sub-piece can be by detecting vibration counting from block mark, and in the present embodiment, by counting to the sub-block mark in each sub-piece (228,2229), and position that can the recognin piece.
And it is also passable that the block mark that adopt in above-mentioned various embodiments the appropriate location in the VFO zone 21 forms same block mark.And in the present embodiment, form the different partly sub-piece distinguishing mark 228,229 of vibration frequency in the part foremost of each sub-piece 221,222, and the position of sub-block mark 228,229 is also passable in the rearward end of each sub-piece.And, can on all sub-pieces, not establish distinguishing mark 228,229, replace, it is also passable that odd-numbered or even-numbered only are set.
The vibration frequency of sub-block mark 228,229 suitably is set in more than 1.2 times of other partial vibration frequencies by the identical reason of above-mentioned reason, in the scope below 3.0 times for well, if in the scope below 2.0 times more than 1.5 times then better.
The position of sub-block mark 228,229 specific sub-BOB(beginning of block)s, therefore fine use also can show other information more.Such as using a plurality of sub-block mark in certain piece, comprise, store that piece or other address of related is also passable, it is also passable to store some other information.Use under the situation of a plurality of sub-block mark MBA memory block addresses,, have the advantage that the address regenerating stability improves because its address is to be stored by the vibrational waveform in the piece.
During by the information of a plurality of of the combination of sub-block mark storages, must give the possible different shape of identification more than sub-block mark 2 values.For the vibration of the sub-block mark of difference, can distribute different frequencies, also can distribute different phase places tuning.
Secondly, with reference to Figure 19, describe from the circuit formation of CD media regenerated clock signal relevant and address information with present embodiment.
At first owing to use with track orthogonal directions (diametric(al) of disk) is cut apart and be subjected to photoelement 901 and difference operation device 371, regeneration comprises the electrical signal of the signal content corresponding with the vibration of rail groove.Low-pass filter (LPF) 374 is only extracted the basic cycle composition of vibration signal out from this regenerated signal.Have only the signal of basic cycle composition to give clock forming circuit 373.Clock forming circuit 373 such as being to be made of the PLL circuit, by the basic cycle signal of accepting is enlarged several times, is generated as the clock signal that the storing, regenerating signal Synchronization is handled.
On the one hand, Hi-pass filter (HPF) 375 allows the radio-frequency component that is included in the regeneration vibration signal pass through selectively.The radio-frequency component that comprises sub-block mark 228,229 as shown in figure 18 in the output of Hi-pass filter 375 is by the marginal element of the wavy precipitous variation of the sawtooth of sawtooth wave vibration generation.
Sub-block mark detecting circuit 377 detects the vibration component by sub-block mark 228,229 assigned frequencies, sends timing signal when detecting these signs.Deliver to address decoder 378 from the timing signal of sub-piece detecting circuit 377 outputs.
As previously mentioned, the polarity at the edge of the precipitous displacement of sawtooth wave vibration is according to ' 1 ', ' 0 ' counter-rotating of address information.Address information detecting circuit circuit 376 detects its reversal of poles based on the output of Hi-pass filter, and bit data stream is delivered to address decoder 378.The address decoder 378 of receiving bit data stream is based on the timing signal refresh address information from sub-block mark detecting circuit output.
From above embodiment as seen, vfo signal writes on each piece and forms distinguishing mark, and one group of vibration calculated address is arranged, and can provide with the piece thus is that unit is suitable for high density, easily the CD media of the canned data that realizes.In addition, because sufficient distance is left apart from this distinguishing mark in the position that storage beginning and storage stop, can alleviate the deterioration of storage film.
Embodiment 13
Please refer to Figure 20 below.
On the CD of present embodiment, stored address information 301 for upper 21 of 32 of secondary message block.And in 32 of the secondary message block, 10 functions storage parity codes 302 of central authorities, the most the next storing additional information 303 as error correcting code.When CD has two layers of accumulation layer, storage ' 0 ' in the additional information 303 of the accumulation layer of ground floor, storage ' 1 ' also can in the additional information 303 of the accumulation layer of the second layer.The content of additional information 303 does not limit such layer information.It is also passable by the quantity of information that additional information 303 increases can show to make up a plurality of continuous additional information.So, than the more complicated information of above-mentioned layer information, such as literary property information, fabricator's information etc. can be stored.Above-mentioned 21 bit address information or 31 s' error correcting code can be by exclusive logic with as simple parity code.Improve the ability of EDC error detection and correction thus.Additional information is ' 1 ' also passable entirely.And only secondary information be the follow-up block mark in ' 1 ' unit interval as block mark identification, the precision that block mark is detected improves.
What here, above-mentioned 31 error correcting codes were used as the symbol that can correct the mistake more than 2 is well-known BCH code.As shown in figure 20,31 bit address information are b0, b1 ..., b20,10 bit parity positions are Pp0, p1..., and p9, message polynomial 1 (x) they are (formula 1), and odd even polynomial expression P (x) is that (formula 2) is represented, and P (x) is generated by (formula 3).At this moment, generator polynomial G (x) is (formula 4).This is well-known as (31,21) BCH code, and 2 error correction arbitrarily that are included in 31 codes are possible.
(formula 1)
(formula 2)
(formula 3)
P(x)＝x
10*I(x)mod?G(x)
(formula 4)
G(x)＝x
10+x
9+x
8+x
6+x
5+x
3+1
In the present embodiment, address information, parity code, secondary information are arranged in order, but are not limited to these.Further, if predetermined fixed configuration, no matter how arrange the position in all positions of 21 of secondary block address information, 10 of parity codes, 1 of secondary information, can return former state and handle.And each piece of the CD of present embodiment gives the formation of 32 secondary information, still, and such as giving 26,52,64 etc. the formation of secondary information as long as suitably select can bring into play effect equally as error correcting code.
As mentioned above, the CD media of present embodiment, a message block is divided into N=32 sub-piece, quite the interval of each height piece is pre-formed the vibration of corresponding secondary information shape, thus, need not overhead and between group, pre-groove need not be set, can the calculated address.Further, though the vibration of Xing Chenging here since the frequencies of the different vibrations of the shape of the rising of secondary information, decline can not change yet.When extracting all the time signal out for storage thus, after the bandpass filter of using the bandwidth of the frequency that only allows pass through is removed the noise composition,, just can obtain not having the clock signal that distorts as long as use PLL to double synchronously simply.And then, secondary message block is divided into address information and odd even part as error correcting code, can the very high address information of regenerating stability.
Embodiment 14
What Figure 21 represented is the distribution of the position of the secondary message block of embodiment 14 CD media.In addition, the CD of the CD embodiment 13 of present embodiment is different with the formation of secondary message block, and the configuration of other secondary information, shape etc. are the same with the CD of embodiment 13.
Usually, address information is an arranged in order, as long as the address of understanding predecessor block, the address of subsequent block also just can be predicted.But, possibly can't guarantee continuity sometimes because wrong track jumps.Yet the track of mistake discontinuous the situation about changing in the next position side in address that produces of jumping is a lot, and in upper position side owing to can analogize from the radial location of shaven head, we can say that address information is very important in the change of the next position side.
So in the CD of present embodiment 21 address information is divided into 14 upper 311 and 7 address information 312 of address information, an additional bit parity position 313 becomes 15 error correcting code (error-detecging code) in the address information upper 311, and then in address information the next 312 additional 8 the next odd even 314, as 15 error correcting code.Further, add up to constitute 32 secondary message block in the additional information 315 of appending 2.Additional information 315 is the same things with the additional information 303 of embodiment 13 expressions.
What here, 15 error correcting code constituting of above-mentioned address information the next 312 and the next odd even 314 adopted as the code that can correct 2 bit-errors is well-known BCH code.7 address information the next 312 be b0, b1 ..., b6,8 following bit parity 314 be p0, p1 ..., p7, message polynomial I (x) is (formula 5), odd even polynomial expression P (x) be by (formula 6) expression, P (x) is generated by (formula 7).The generator polynomial G (x) of this moment is (formula 8).Here (15,7) are called optical imaging as BCH code, can comprise any 2 error correcting codes in 15 code signs.
(formula 5)
(formula 6)
(formula 7)
P(x)＝x
8*I(x)mod?G(x)
(formula 8)
G(x)＝x
8+x
7+x
6+x
4+1
Upper odd even 313 (p10), 14 address information upper 311 be b8, b9 ..., b20, the even number odd even that p10=b8+b9+...b20 (+for exclusive logic and) tries to achieve.This can detect any 1 mistake that is included in code sign.Like this, the odd even of the less redundancy of upper use of address information, the big redundant odd even of the next employing that is to say that the error correcting ability of address information is overlapping, the next position one side tool is made of stronger ability.
And, upper 14 additional 1 bit parities of address information in the CD of present embodiment, the next 7 additional 8 bit parities of address information are as error correcting code, such as 1 bit parity in also can upper 16,10 bit parities in the next 5 (the next (15,5) BCH code), perhaps upper 9 do not have odd even, 11 bit parities (the next (23,12) BCH code) in the next 12, be provided with in this wise, carry out upper the next cutting apart without limits.
As mentioned above,, add that the CD media address information of embodiment 13 is carried out upper, the next cutting apart, make the error correcting ability of a next side be improved, further improved the reliability of address information regenerative operation by the CD media of present embodiment.
But the same with embodiment 13, in the CD media of embodiment 14, owing to use the error correcting code of a kind of like this complexity of BCH, be the address problem that necessary circuit scale becomes very big of regenerating with regard to having produced on the other hand.
Embodiment 15
Figure 22 represents is the distribution of position of secondary message block of the CD media of embodiment 15.In addition, the CD media of the CD media of present embodiment and embodiment 13 is different with the formation of secondary message block, and the configuration of other secondary information, shape etc. are the same with the CD media of embodiment 13.The secondary message block of the CD media of present embodiment amounts to 32 by 21 address informations and 11 s' odd even 322 and constitutes as shown in figure 22.
Below, use Figure 23 that detailed formation is described.Address information 321 21 from b0 to b20, b20 are to b14, and b13 is to b7, and b6 is to 7 row * 3 row configurations of b0, and 7 additional 1 bit parity positions of 1 row become 8, and 3 additional 1 bit parity positions of 1 row become 4, amount to the error correcting code of (7+1) * (3+1)=32.Additional odd even is from P0 to P10, and the parity bit symbol that the symbol of 47 row of 8 of add parity position 1 row and 1 row becomes separately selects ' 1 ' or ' 0 '.And then P0 selects the even number parity character from P7 to P0.That is to say that P0 is obtained to (formula 19) by (formula 9) to P10.
(formula 9)
P
10＝b
20+b
12+b
18+b
17+b
16+b
15+b
14
(formula 10)
P
9＝b
13+b
12+b
11+b
10+b
9+b
8+b
7
(formula 11)
P
8＝b
6+b
5+b
4+b
3+b
2+b
1+b
0
(formula 12)
P
7＝b
20+b
13+b
6
(formula 13)
P
6＝b
19+b
12+b
5
(formula 14)
P
5＝b
18+b
11+b
4
(formula 15)
P
4＝b
17+b
10+b
3
(formula 16)
P
3＝b
16+b
9+b
2
(formula 17)
P
2＝b
15+b
8+b
1
(formula 18)
P
1＝b
14+b
7+b
0
(formula 19)
P
0＝P
7+P
6+P
5+P
4+P
3+P
2+P
1
Here the even number parity character number that is included in code sign 1 becomes even number and selects even bit like that, and this can detect 1 mistake as everyone knows.And the error correction information position just all adopts exclusive logic and get final product, and the circuit formation is very simple.And then, having reversed such as supposition b18 mistake, row odd even P10 and row odd even P4 can detect mistake and the errors present of b18, as long as with the b18 counter-rotating, just can error correction.
As implied above, the CD of present embodiment, the address information two-dimensional arrangement, two-dimensional directional adopts simple parity code separately, thus, though the address regenerative loop is small, has very strong error correcting capability.
Embodiment 16
With reference to Figure 24 (A)～(D), the embodiment of CD media of the present invention is described.
What Figure 24 (A) represented is the storage surface 401 of CD media, and the track space with regulation on the storage surface 401 forms spiral helicine rail groove 402.Data storage regeneration is carried out storage block 403 as least unit.
Each storage block 403 in order to manage the position of its storage block, all has positional information (address information), and in the present embodiment, shown in Figure 24 (b), each storage block 403 comprises four positional information units 404.
In each position information unit 404, the physical location information of CD media, its index that detects be storage in advance all.In the present embodiment, these information combination by the vibration shape of rail groove or the like shows.The vibration group forms when CD media is made.Can rewrite the positional information of storage as the combination of vibrational waveform.
Like this, in the present embodiment, for a storage block 403 of the least unit of the storing, regenerating of data, the positional information of its piece is stored in a plurality of zones.Therefore as long as detect of a plurality of positional informations, just can determine the position of storage block 403, this is its advantage.
Here, positional information 404 comprises accurate witness marker portion 405, positional information portion 406, synchronous mark portion 407 shown in Figure 24 (C).The index of the absolute fix in accurate witness marker portion 405 during as the storage of data is used, and forms accurate witness marker (distinguishing mark).Accurately witness marker wishes to have the same structure of block mark that adopts in the above-mentioned embodiment.
Accurately witness marker uses memory storage to play an important role in data are noted down the storage film of CD.In order to improve the precision of absolute fix, should use the shape that detects than higher frequency signal.
In position information portion 406 and synchronous mark portion 407,, write various positional informations owing to allow the vibration shape of rail groove 402 change.The variation of the vibration shape of rail groove can be by the disk of rail groove through the variation of amplitude, frequency and/or the phase place of direction displacement and obtain.The vibration shape that adopts is difficult to that the storage data are had bad influence, and the positional information that shows as the vibration of rail groove changes with the film quality of storage film, has determined the data and the Signal Separation of storage to become easy.More particularly the frequency of vibration signal should belong to than the also low frequency band of the storing frequencies of data that writes the storage film for good.And as previously mentioned,, should take various ways for high precision identification vibrational waveform.
Shown in Figure 24 (C), in continuous 2 positional information units 404, be included in the accurate witness marker portion 405 in the positional information unit 404 of back, be configured in the rear that is included in the synchronous mark portion 407 in the positional information unit 404 in advance.
By adopting above-mentioned configuration, utilize the result that detects who also is easy to the synchronous mark portion 407 that detects separately, can detect the accurate witness marker of follow-up accurate witness marker portion 405 accurately.Specifically,, after the elapsed time by regulation, open the prediction window that detects of accurate witness marker, can detect and be positioned at the accurate witness marker that detects prediction window from the detection time point of synchronous mark portion 407.Do like this, can prevent the mistake that detects of accurate witness marker.
In order to obtain above-mentioned effect, should dispose accurate witness marker portion 405. in the tight back of synchronous mark portion 407.Therefore in each position information unit 404, shown in Figure 24 (C), start anew, according to the such arranged in order of accurate location division 405, positional information portion 406 and synchronous mark portion 407 for well.
Figure 24 (D) is the formation synoptic diagram of the data of CD media storage with above-mentioned rail groove structure.For the positional information and related storage data of storing on the hyperdisk, data storage regeneration is handled storage block 403 as least unit.
Continuous two storage blocks 403 are connected by link portions 408.The beginning of storage and end are carried out within link portions 408.The position basically identical of the position of link portions 408 and accurate witness marker portion 405.For link portions 408, the mode that does not comprise user data with storage is for well.So,, be subjected to bad influence, also can not give birth to harmful effect the data renewable hair even the storage signal of link portions 408 has interference with accurate witness marker.
And be positioned on the link portions 408 of storage beginning, terminating point, the storage data are discontinuous.Therefore for sense data reliably, in link portions 408, should store as with the VFO of the signal storage of single-frequency for well.
Below, with reference to Figure 25, present embodiment is elaborated.On the storage surface 401 of the CD media of present embodiment, scribble phase change material, form rail groove 402 with orbital spacing 0.32 μ.On storage surface, further form the dielectric film of 0.1mm.When carrying out storing, regenerating, the laser of wavelength 405nm shines by the contrast lens of NA0.85.Rail groove 402 with cycle of about 11.47 μ m at interior all sides, outer circumferential side snakelike (vibration).The vibration of above-mentioned rail groove can be detected by push-pull signal, and this signal is enlarged about 186 times, and therefore the certain line density storage with 0.0617 μ m (=11.47/186) on the channel bits can generate store clock.
Mistake is corrected, interlacing, cross processing etc., be that least unit is handled with the storage block equally.A storage block of present embodiment comprises the user data of 64K byte.
On the storage data, additional error is corrected sign indicating number, in order to store on suitable CD media, to carry out frequency modulation and handles.As mistake correct sign indicating number can adopt on DVD etc., use read the Suo Luomen industry code, as the frequency modulation of storage data, can adopt the frequency modulation of 8-16.And then, the additional and bit synchronous SYNC of regenerated signal (SYNCronaization Code) on the storage data, or for writing the VFO (Variable Frequency Oscillator) of PLL.The storage data of present embodiment have 1243968 channel bits long.
The accurate witness marker portion 405 of present embodiment as shown in figure 26, the sine wave oscillations 501 of the sinuous vibration of rail groove forms in 8 continuous modes of waveform.And. in so accurate witness marker portion, as shown in figure 27 in second waveform of vibration with rail groove in accordance with regulations length block, form mirror flag 601.Mirror flag 601 can detect from the full additive operation signal that obtains by the disk reflection to reproducing laser.
Accurately witness marker is as the absolute position for decision necessity in positional information detects, the index of the absolute position when service index, data storage.
The length of the mirror flag 601 of present embodiment is 2 (32 channel bits).For the influence of the length that makes mirror flag 601,2 layers of influence between disk layer are tried one's best carry out some settings littlely, such as being set at below 10 bytes (=10 μ m) to the adjacent tracks groove.On the other hand, the length of mirror flag 601 is preferably set for and is made it detect the length that can fully realize, such as being set at more than 1 byte (=1 μ m).
This mirror flag 601 preferably is configured in after vibration second waveform of accurate witness marker portion 405, and in order to ensure the high precision that is detected the vibration position of generation by synchronous mark portion 407, preferably is configured in before the 4th waveform of vibration.
Present embodiment in accurate witness marker portion 405, is carried out the end that the storage of data begins and stores.That is to say the link portions 408 corresponding accurately witness marker portions 405 of the link effect of being responsible for storage.So, can when store location, effectively utilize accurate witness marker.
Secondly, the position of mirror flag 601 is as follows with the best relation of storage beginning, end position.
(A) the storage starting position is after the mirror flag of accurate witness marker portion.
(B) the storage end position is after the mirror flag of accurate witness marker portion.
(C) accurately the top of witness marker portion begins to begin to be provided with longlyer to the storage end position to the length of the storage starting position top than accurate witness marker portion.
(D) for storing the CD media of using repeatedly, storage starting position, storage final position and mirror flag are isolated.So that do not feed through to mirror flag owing to storing the influence that makes storage film deterioration that produces repeatedly.
(E) after the mirror flag of memory storage detects, to the actual processing delay time that begins to store the memory storage of considering necessity, decision mirror flag position and the position relation of storing the starting position.
Below condition (A) is described in detail to condition (B).
Condition (A) is the condition determination of the absolute positional accuracy of storage starting point.Shown in Figure 31 A, owing to the starting position 901 of storage is placed on after the mirror flag 601 of accurate witness marker portion 405, after mirror flag detects in memory storage, can begin storage immediately, therefore can bring into play the purpose of the mirror flag of special physical block starting position to greatest extent.The absolute positional accuracy of storage starting point is improved.
Condition (B) is the condition determination of the absolute positional accuracy of storage terminal point.Shown in Figure 31 b, because end position that will storage is arranged on after the mirror flag 601 of precision witness marker portion 405, after mirror flag detects in the memory location, can stop storage immediately, therefore with the same consideration of storage starting point condition (A), also can improve the absolute positional accuracy of storage terminating point.
Condition (C) is when storage terminating point, starting point are undertaken by same accurate witness marker portion, shown in Figure 31 C, and the meaning that the storage end position 902 of existing storage block and the storage starting position 901 that is right after storage block thereafter can overlappingly be stored.The starting position of decision storage, the end position of storage can prevent to store beginning, store the gap of finishing like this, just prevent to produce the not zone of storage.If in residual not storage area storage data, in regenerating unit during the regeneration canned data, the above-mentioned not storage area regenerated signal that may not can come out, the binaryzation of regenerated signal, clock regularly can produce temporary transient shakiness, and this does not wish to take place.If make the beginning and frequent overlapping the carrying out of end of storage, regenerated signal does not have absent variable situation, can improve the reliability of data reproduction.
Condition (D) is for preventing because in the influence of the starting end deterioration of various storages, and to the condition that produces baneful influence that detects of mirror flag.The phenomenon that the regular meetings such as situation that so-called storage starting end deterioration is exactly all phase-transition materials of CD media storage film take place, the starting position of storage and end position be because the accumulation of temperature, storage etc. repeatedly, and the storage film is rotten or damaged.When regenerate in the damaged generation of the storage film of regenerating unit zone, can observe the variation of total reflection light.So, if mirror flag enters or near the zone of storing top, terminal generation deterioration, by the variation of original total reflection light, detect the deterioration that mirror flag is followed the top terminal, with the difference of the total reflection light difficulty that becomes, probably can be to mirror flag detect the generation baneful influence.In order to prevent above-mentioned baneful influence, shown in Figure 31 D, may be subjected to the position that the zone 903 of top deterioration influence is left from the starting position 901 of storage, mirror flag 601 is set for well.And, as shown in figure 31, may be subjected to the position that the zone 904 of top deterioration influence is left from the end position 902 of storage, mirror flag 601 is set for well.
Condition (E) is to have the more condition of strict difinition than condition (A), it in addition consider the delay of device, consider decision from the position of mirror flag the condition to the length of the starting position of storage.As the processing delay of device, such as be the processing delay of mirror flag detection device, detect after the mirror flag, to the processing delay of synchronous interpolation, for time of producing necessity that the storage laser energy prepares or the like all at this type of.Consider these processing delay time, the starting position of decision storage thus, the purpose of the mirror flag that condition (A) is illustrated, that is to say the effect that the absolute positional accuracy that can reach the storage starting point improves.
And then positional information sign portion 406 and synchronous mark portion 407 are that the set by the continuous secondary information unit 408 of 32 ripples of vibration of same shape constitutes.Positional information sign portion 406, shown in Figure 26 b～26C, in circumferentially the vibration of the precipitous waveform of displacement or the outer circumferentially precipitous waveform of displacement vibration respectively to one information assignment ' 1 ' or ' 0 ' as secondary information, since secondary information unit be 48 continuous, constitute 48 bit position information and its error-detecting code.
Here, from the positional information that positional information sign portion detects, necessary specific location information sign portion foremost.So use mirror flag 601 in the above-mentioned accurate witness marker portion 405.But detecting of mirror flag 601 may wrongly detect separately or NF problem.CD media of the present invention is after synchronous mark, be provided with the accurate witness marker portion 405 of follow-up location information unit 404, the position of the mirror flag 601 that in accurate witness marker portion 405, exists with detect weave in synchronously, therefore high precision is carried out, and it is characterized in that detecting precision and can being improved of the necessary mirror flag 601 in absolute position.
4 continuous waves formations of the secondary information 408 that vibration that two aspects of 407 interior circumferentially displacements of synchronous mark portion and outer circumferentially displacement are precipitous or interior circumferential displacement and sine wave oscillations constitute.What Figure 28 A～28E represented is the example of the vibration shape of synchronous mark portion 407.Synchronous mark 407 all is that the vibrational waveform 501 (to call sine wave oscillations in the following text) of the such sine wave of precipitous vibration wave 504 (to call two square waves in the following text) and Figure 26 A combines by interior circumferential displacement and outer circumferentially displacement both direction as Figure 26 D.And Figure 28 A～28E two rectangle vibrations 504, ' S ', sine wave oscillations 501, is expressed as ' B '.
Figure 28 A is characterized in that 4 secondary information units all are that two rectangles vibration 504 constitutes, and the continuity height of the vibration of same shape is so it is also high to detect precision.Figure 28 b and Figure 28 C be in each secondary information unit, and two rectangle vibrations 504 and sine wave oscillations 501 form alternately, because it is many to vibrate the change point of shape, its feature also is the precision height of its absolute position.Figure 28 D and Figure 28 E are made of two rectangle vibrations, sine wave oscillations, sine wave oscillations, two rectangles vibrations (perhaps its negative shape).The feature of this formation is that the change point that sine wave oscillations shifts to the vibration of two rectangles has two from the change point of two rectangles vibration 504 to the transfer of sine wave oscillations 501, from the reliability height of its position relation to the wrong understanding of absolute position.
In addition, the CD media of present embodiment, the positional information section that is equivalent to a unit of storage block is made of 4 positional information units, but the present invention is not restricted to this.The positional information section also can be made of L (L is a natural number) positional information unit.
Here do following supposition.
The quantity of information of each position information portion 406: A position
The length of each synchronous mark portion 407: the B cycle of vibration
The length of accurate witness marker portion 405: the C cycle of vibration
The length of secondary information unit: the M cycle of vibration
The length of vibration one-period: the W of 1 channel bits of storage data doubly
The channel figure place of each storage block: D position
Positional information number in each position message segment: E
Here, A, B, C, D, E, M and W are natural numbers, and following formula 20 is satisfied in definition.
(formula 20)
D＝(A×M+B+C)×W×E。
Present embodiment, the frequency modulation sign indicating number of storage signal are according to well-known 8-16 frequency modulation, so the vibration period is decided to be 186 channel bits (W=186).And accurately location division 405 vibrated for 8 cycles, secondary 408 vibration 32 cycles (C=8, M=32) of information unit, but the present invention does not limit these, can be such as using 8 frequency modulation sign indicating numbers that become 15, and the vibration period also can be 155 channel bits.And precision witness marker portion also can 405,9 vibration periods, 408,36 vibration periods of secondary information unit.
(1,7) frequency modulation is such as everyone knows, when adopting the conversion frequency modulation sign indicating number of 3 of 2 changes (8 become 12), the vibration period is 186 channel bits, accurately location division 405,6 vibration periods, secondary information unit 408,24 vibration periods also can, perhaps not like this, vibration period is 124 channel bits, accurately witness marker not 405,9 vibration periods, 408,36 such settings of vibration period of secondary information unit also passable.
That is to say, when using 8 bit maps to become F channel bits FM signal, do following supposition.
The length of vibration period: W channel bits
Accurate witness marker portion 405: vibration C cycle
Secondary information unit 408: vibration M cycle
At this moment, shown below if satisfy the CD media that (formula 21) and (formula 22) constitutes simultaneously, accurately the vibration frequency number of all present embodiment of witness marker portion 405, position synchronous portion 406, synchronous mark portion 407 constitutes with equal distribution and is fine.
(formula 21)
P×R×F＝C×W
(formula 22)
Q×R×F＝M×W
Here P, Q are rational number, and R is a natural number.P represents the suitable length of the length of accurate witness marker portion as storage data P frame data.In the present embodiment, P=1, Q are meant that 1 secondary information unit does the storage data, the length that the Q frame divides.In the present embodiment, Q=4.R is the byte number of storage data 1 hardwood, in the present embodiment, and R=93.And the relation establishment that can draw P: Q=C: M by (formula 21) and (formula 22).
By above-mentioned constituting, the association of the curve of montage vibration (comprising positional information and mirror flag) storage data can easily be carried out in CD media in advance.Its result, the memory storage that the CD media of present embodiment is used and the formation of regenerating unit can accomplish to oversimplify.P and Q are that rational number is passable, if integer is better.
All of the accurate witness marker of the CD media of present embodiment portion 405 are provided with mirror flag 601 as accurate witness marker, and the precision that detects of positional information can improve thus.But in order to be diminished by the influence between mirror flag 601 contiguous track, two layers of disk layer, 405 in the accurate witness marker portion that is positioned at positional information section positional information unit foremost 404 is also passable at this configuration mirroring sign 601.
Accurate witness marker does not limit the mirror flag of use in the present embodiment.So long as in order to obtain the high detecting signal of bearing accuracy, the signal identification that obtains position signalling is relatively easy to indicate just passable.Such as, the cycle of the vibration that forms for positional information forms the vibration of abundant weak point, and it also can as accurate witness marker.And, at the groove of the vibration group of adjacency isolated position is set at interval, it also can as accurate witness marker.
In the present embodiment, secondary information ' 1 ' is as the precipitous vibrational waveform of interior circumferential displacement, and secondary information ' 0 ' is as the outer circumferentially precipitous vibrational waveform of displacement, and synchronous mark portion represents like that as the combination that two rectangles vibrate (S) and sine wave oscillations (B).Here, information ' 1 ' and ' 0 ' can be discerned with the Euclidean distance of maximum, and, information (B) with (S) can differentiate with the Euclidean distance of maximum.So, for to same effect, information ' 1 ' represents with two rectangles and sine wave separately with ' 0 ', sign (B) and vibrational waveform that periphery or interior circumferential precipitous part (S) be set are separately represented also passable on year-on-year basis.
In the present embodiment, 4 kinds of vibrational waveforms (sine wave, two rectangles, only in circumferentially displacement precipitous, only outer circumferentially displacement is precipitous) all use storage synchronous marks and positional information, but the present invention is not limited thereto.Such as only use 2 kinds of waveforms here (only circumferentially displacement precipitous/it is only outer that circumferentially displacement is precipitous) vibrational waveform also passable, use 3 kinds of vibrational waveforms also can.When using 2 kinds of vibrational waveforms, should note allowing the identification of synchronous mark and positional information carry out easily.For this reason, determine the frequency modulation rule according to positional information, carry out frequency modulation, the waveform that disposes the uniqueness that does not have appearance in the above-mentioned frequency modulation rule in synchronous mark is also passable.
In addition, in the present embodiment, allow rail groove become sigmoid curve (vibration), carry out positional information and the storage of sign on year-on-year basis by the change of shape (level and smooth or precipitous) of sigmoid curve displacement in the single cycle.But, be configured in the restriction of kind that effect that precision improves is not subjected to the vibrational waveform of rail groove that detects of accurate witness marker that accurate witness marker front obtains owing to synchronous mark.The formation effect of above-mentioned configuration, such as the variation of rail groove vibration period, vibration phase variation, Oscillation Amplitude variation etc., thus the CD of memory address type type or by Oscillation Amplitude change, dark variation and to carry out the CD of type of address storage also applicable.
As mentioned above, if in the positional information unit with accurate witness marker portion, the such arranged in order of positional information portion and synchronous mark portion, in the continuous position information unit, be included in that the accurate witness marker (mirror flag) of accurate witness marker portion is follow-up to be disposed in synchronous mark portion.Therefore use near the result that detects of synchronous mark portion, the precision that detects of the accurate witness marker (mirror flag) foremost that is configured in the follow-up location information unit is improved.
Secondly, describe with regard to the example of the storage data layout of present embodiment with reference to Figure 31 A～31C.Here, Figure 31 A represents to store the data layout of the storage block of starting point, Figure 31 B represents the data layout of the storage block in the storage continuously, Figure 31 C represents to store the data layout of the storage block of terminal point.
In the drawings, each data segment (Data field1, Data field2, Data field3, Data field4) has 19344 byte lengths, 208 configurations continuously of frame zone (not shown) of 93 byte longs.The frame zone of each 93 byte is made of SYNC sign indicating number 2 bytes foremost, storage data 91 bytes of frequency modulation.So the maximum of storage data is 91 * 208=18928 byte.It is 16K bytes that but actual user can store the amount of data, and this is because in order to detect wrong and to correct a mistake and added the redundant datas such as ID that parity code, memory location are discerned.
(VFO1, VFO2 are the zones that utilizes PLL to introduce for regenerative operation VFO3) to each VFO field, are not used for storaging user data here.Each VFO field is because PLL introduces at a high speed carries out, and is easier for bit synchronization is obtained, such as storing the long sign in fixed channel position, space repeatedly for well.
Each PA field (PA) is brought into play the function that it can be connected near the rear end of data field.Such as, as the frequency modulation sign indicating number of data field, when using well-known limited code working time (to call the RLL sign indicating number in the following text), nearby the part that links with the data segment rear end also is full of the run duration limited code, and the symbol of the rear end of data segment can correctly carry out during regeneration.
Each PS field (PS) rises and detects follow-up data field, strengthens byte synchronous effect.Other each zone (data segment, VFO field, PA field) is the waveform that is not easy to detect, such as in other regional non-existent distinct waveforms, make displacement, but can be and all inconsistent precipitous waveform storage of all parts in other zones with own associate feature.
And, Figure 31 A is corresponding with location information field 403 shown in Figure 25 to the storage block shown in Figure 31 C.Each data segment and positional information unit's 404 association store.Just the length of each data segment (Datafield1, Data field2, Data field3, Data field4) makes it consistent with the length of (positional information portion+synchronous mark portion) among four positional information units 404 that constitute positional information section 403.And, the length of (PA+VFO2+PS) is 93 byte longs, make it and accurate consistent storage of length of witness marker portion 405.
Shown in Figure 31 A, among each VFO field, be positioned at the VFO3 of the terminal of the storage block of storing starting point, be 41 byte longs.And shown in Figure 31 B, be arranged in the VFO1 at top of the storage block of continuous storage, be 45 byte longs.It is 86 byte longs that these byte longs add up to, the length secret of VFO2.Equally, the terminal VFO3 that is arranged in the storage block of continuous storage shown in Figure 31 B is that 41 bit bytes are long, and the VFO1 at the top of the storage block that is positioned at the storage terminating point shown in Figure 31 C is 45 byte longs.These byte lengths add up to 86 byte longs, with the equal in length of VFO2.So it is continuously the total of the connecting portion (PA+VFO3+VFO1+PS) between the storage block in the storage is 93 byte longs, consistent with the length of accurate witness marker portion 405.
So, the storage of the positional information association of montage in advance on CD media can be carried out, and data bit stored is put management and also can be carried out with reference to above-mentioned positional information.
Because accurately length 93 bytes of location division 405 are consistent with the length in the frame zone of composition data section, continuously the accurate witness marker portion in the storage both the storage area of (PA+VFO+PS) can be used as a frame processing.So, the link part of each data segment, can obtain synchronously the same with data segment inside, the regenerative operation of regenerating unit also is easy to carry out.
The example that the storage that Figure 32 represents begins and stores the date storage method that finishes.What Figure 32 (A) represented is the sine wave oscillations and the mirror image of the montage in advance of accurate witness marker portion.In this drawing, as selected known (1, the 7) frequency modulation of frequency modulation sign indicating number, 1 byte=12 channels, vibration periods 124 a channel bits length long, accurately witness marker portion is 9 vibration periods.And the position of the sinusoidal wave fixed point of delivering to is as the accurate starting position of witness marker portion, and the starting position of mirror flag is from the 22nd byte position of the starting position of accurate witness marker portion, 2 byte longs of the amplitude of mirror flag.
So, the length that begins the center (the 23rd byte) to mirror flag 601 from accurate witness marker portion is
, about 2.25 cycles of vibration, as shown in the figure, with the zero cross point of the trailing edge of the 3rd ripple of sine wave oscillations and local consistent.
What Figure 32 (B) represented is the storage block of storage beginning.
In this example, VFO section (VFO1) is after (45+K) individual bytes store, stores PS field, data field (Data field) continuously.Here K represents the integer from 0～7.When carrying out the data storage of memory storage, integer K is set at random at every turn, and its effect is the deterioration that reduces the storage film that causes in same address owing to same data storage.
What Figure 32 (C) represented is the storage terminal point of storage block.In this example, finish store the storage of PA field, VFO field (VFO3) (50-K ') afterwards continuously in data block (Datafield4) after.This K ' also is from 0 to 7 round values.Owing to do like this, the storage film deterioration of storage end position alleviates, and the K when this K value begins with storage is the same also passable, and the value that storage beginning, storage finish is different also passable.
When employing becomes the frequency modulation sign indicating number of F channel bits with 8 bit maps, begin to be decided to be (20+J/F) to the length of storage starting position (starting point of VFO1) from the terminal of mirror flag.J is from 0 integer to (F-1).Such as, when carrying out the data storage of memory storage, owing to integer J sets at random, even the situation of storing repeatedly in same address is being stored the deterioration that starting point also can suppress to store film at every turn.
Present embodiment is when storing repeatedly in a place, in the zone that the end all the time of storing film causes deterioration, from the rear G byte of storage beginning, the tight the place ahead of terminating point G byte of storage.
From the length of above-mentioned mirror flag terminal, be in order to satisfy above-mentioned condition (A), (D) and (E) and fixed.In other words, integer J is in above-mentioned scope the time, and beginning to the length of storage starting point from the mirror image terminal is more than 20 discontented 21, minimumly also will guarantee more than 20.As long as guarantee this length, scope, the memory storage mirror image that the deterioration at storage top involves detects the necessary processing time delay of storage beginning, takes the circumstances into consideration to consider also just passable.
On the one hand, is 29 bytes from the terminal of mirror flag to the length of storing end position (terminal point of VFO3), when the precision of memory location is carried out with desirable zero error, the scope G that the storage terminal deterioration involves＜29 o'clock, can be quite from the such condition (D) in position of the regional separation mirror sign of storage terminal deterioration.Clearly this satisfy condition (B).
Accurate beginning of witness marker portion to length (44+J/F) byte of storage starting position, accurately the top of witness marker portion is to length (53+J/F) byte of storage end position, the two differ from 9 bytes.Both satisfied condition (C), when the memory location precision was zero ideally storage in error, storage beginning, end position overlapping had 9 bytes, and the change of memory location adds up to 9 bytes, also can not stay the not zone of storage.
As mentioned above, when the position that the setting storage begins to finish,, use mirror flag can reach the effect of raising storage beginning, end position precision in order all to satisfy the position relation of above-mentioned condition (A) to (E).
And VFO field (VFO1) is to introduce and use for the binaryzation of the playback of data of regenerating unit and PLL, is actually the zone that can be used in above-mentioned purpose in the scope of (45-G).
Embodiment 18
Regeneration CD player road, the address regenerating unit of the CD media of embodiment 17 is described with reference to Figure 29.In Figure 29,801 aggregation laser bundles are followed the tracks of the luminous point of the rail groove of CD media 1, detect the signal that the shaven head of CD signal light and shade, the 802 pairs of laser heads 801 detect and carry out computing, add the computing signal entirely, are the Regeneration Treatment parts that generate vibration signal.Vibration signal as interior all sides just, the negative signal performance of outer circumferential side.Secondary information detecting element detects has only the just output ' 1 ' of the precipitous vibration signal of rising displacement, detects and has only the just output ' 0 ' of the precipitous vibration signal of decline displacement.
Here, do not show the focus control parts among the figure, by luminous point track rail groove, carry out such control by the track control assembly, the optical disc storage regenerating unit of present embodiment at first must detect positional information for the absolute position of special track designation groove.Below, the explanation in order to detect the operation of positional information.
Figure 33 is the schematic block diagram of an example of positional information Regeneration Treatment of the optical disc storage regenerating unit of present embodiment.At first, carry out (the step 1) that detects of synchronous mark in the synchronous mark parts.Detect after the synchronous mark, as the thick synchronous regime of positional information, from synchronous mark detect that prediction of result goes out that follow-up accurate witness marker (mirror flag) should occur during (step 2).(step 3) is as positional information precise synchronization state, from interval (bit interval of the positional information) (step 4) that detects the secondary information of prediction of result of accurate witness marker to detect accurate witness marker (mirror flag) in predictive period.When not detecting accurate witness marker, just with the thick synchronous regime of positional information, from the interval (bit interval of positional information) that detects the secondary information of prediction the result of synchronous mark above predictive period.Location interval according to prediction carries out the regeneration of the portion of positional information, read-out position information (step 5).
As mentioned above, accurately under the situation that witness marker (mirror flag) is detected, in order correctly to predict the interval of secondary information, can reduce the mistake that detects of positional information, accurately witness marker (mirror flag) detect less than the time, the interval that the result also can predict secondary information that detects of using synchronous mark.
And, in treatment scheme shown in Figure 33, under the situation that can't detect synchronous mark of step 1, till detecting, can not transfer to detecting of accurate witness marker, using the result that detects of synchronous mark of the piece before this piece, to change processing also passable.Figure 34 is the schematic block diagram of an example that comprises the locating information Regeneration Treatment of above-mentioned processing.
In Figure 34, when the synchronous mark in the step 1 can not detect, judge that the situation of the synchronous mark that detects in the N piece (N is a natural number) (step 6), detects and carries out, transfer to detecting of accurate witness marker (mirror flag) in advance.That is to say, though the synchronous mark of this piece monitoring less than, can remedy the synchronously thick of positional information from the result of the N piece of front, removed because synchronous mark does not detect the problem that makes the positional information of this piece read not come out.Here parameter N is represented is thick that the synchronous piece of interpolation, the big more expression of N longer during carry out thick synchronous interpolation.When the value of N is extremely big, because synchronous skew may appear in the influence of various variables, so should an optimum value be set according to the performance of device, the characteristic of CD media.
The condition of the synchronously thick or precise synchronization of positional information, using read-out position information or its mistake to detect the result can.Discontinuous such as the several values (address) that detect positional information between its positional information mistake (odd even detection), the continuous piece continuously, in this case, can consider the operation of introducing is synchronously again carried out in the cancellation of the state of synchronously thick or precise synchronization.
To the flow process of above narration, its operation is described with regard to device shown in Figure 29.
Synchronous mark detecting element 804 detects rising displacement, all precipitous signal in decline displacement two aspects of vibration signal, output synchronous mark detecting signal.The first window detecting element 809 is based on the timing of the synchronous mark that is detected by synchronous meter sign detecting element 804, from mirror flag should occur during the back generate the window that detects of amplitude specified time limit.Mirror flag detecting element 805 first window detecting element 809 generate detect between window phase in output add mirror flag position signalling more than the computing signal specified level entirely.There is mirror flag in the CD media of the embodiment 1 accurate witness marker portion follow-up in the tight back of synchronous mark, therefore can clamp-on the above-mentioned window that detects, and prevents that mistake from detecting.
If the synchronous portion 807 of positional information the first window detecting element 809 generate detect between window phase in mirror flag detecting element 805 detect mirror flag, based on it regularly, generate the secondary information interval timing that positional information detects.And when mirror flag detection does not go out,, generate the secondary information interval timing that positional information detects based on the above-mentioned timing that detects window.In this case, when relatively mirror flag detects, detect precision, error rate becomes bad, but can specific location information.The secondary information interval that positional information detecting element 808 position-based information synchronization portions generate regularly judges that secondary information is ' 1 ' or ' 0 ' and detect address information.
Here, in case mirror flag detects simultaneously, the detecting of positional information also when carrying out (error-free situation about being detected), in order to judge that its mirror flag detects the correct of position, the window that detects of the mirror flag of the follow-up location information unit on the same track vibration is further clamp-oned, and can further control wrong detecting thus.
During information stores, systems control division 810 distribution memory commands are to storage part 806..Storage part 806 is based on detecting location-specific absolute position from above-mentioned mirror flag, the starting position of particular memory and end position, and information stores is carried out in the emission light laser on shaven head 801.
Figure 35 is the schematic block diagram of an example of data storage processing of the optical disc storage regenerating unit of present embodiment.
Among Figure 35, the various processing from step 1 to step 6 with by with 33 and the position Regeneration Treatment of Figure 34 explanation identical.By the processing of step 1 to step 6, carry out the regeneration of positional information (address), the positional information (address) of regenerating later is illustrated in the position that store, both judged whether from the next piece in the address of regeneration be (target) (step 7) of the piece of storage object, if judge it is not next destination address, the regeneration frame of home position information is (from step 1～step 6) once more.If judge it is next destination address, just be judgement (the step 8) transfer of precise synchronization state to whether.If judge from accurate witness marker detect state transitions to the precise synchronization state, from the timing that determination data as a result begins that detects of accurate witness marker, store (step 9).Judge it is not the precise synchronization state, return the processing (step 10) that the track with back positions once more.
And, storage starting position and storage end position in advance mirror flag and positional information detect the words of making, even being positioned at the mirror flag foremost of positional information section can not detect, the interpolation of the mirror flag by the positional information section of going ahead of the rest also can be specific.
And, transfer to the condition of the precise synchronization OK that carries out storage, use location information, with and wrong to detect the result also passable.Be detected positional information mistake (odd-even check) continuously such as, this piece or nearby several, perhaps fast continuously between the value of positional information (address) when discontinuous, even detect accurate witness marker, do not begin storage yet, consider the operation that positions once more.
As mentioned above, address regenerating unit by present embodiment, accurate witness marker (mirror flag) for specific absolute position, be present in the tight back of the synchronous mark portion of the rear portion configuration of positional information unit in advance, therefore detect synchronous mark, determine bit flag (mirror flag) by its subsequent fine that window detects after it is tight that detects that regularly generates (mirror flag) of accurate witness marker, can improve the precision that detects of accurate witness marker (mirror flag) thus, improve the reliability of position regeneration.
And, according to the optical disk storage apparatus of present embodiment, when data storage, detect the result by synchronous mark similarly, clamp-on the position that detects of accurate witness marker (mirror flag), can high precision carry out, so the precision of data storage starting position and end position all is improved.
Embodiment 19
Below just write the combination of variation of shape of the management information rail groove of area stores usually, the embodiment of storage describes.
On known DVD-RAM, write the management information areas in the zone, management information is by embossing processing, makes the concavo-convex groove position of having of physics, canned data.Physical format information, disk manufacturing information and copyright protection information etc. are typically said, are meant to so-called management information.When physical format information comprises storing, regenerating, the energy, the necessary information of compensation of energy of the laser of irradiation CD media, disk manufacturing information comprise CD media the fabricator, relevant information such as make batch.And copyright protection information comprises encipherment, the necessary key information of symbolism etc.Such management information of past is by trench storage.
The embodiment of the invention described above is by the rail groove sigmoid curveization of user area (data area), and the change of shape of rail groove (variation of vibrational waveform) makes up, stored position information.Present embodiment is characterised in that: in the fabrication phase, the vibrational waveform that writes zone and H/ or write the management information sigmoid curve track of storing in the zone makes up and stores.
Below, with reference to Figure 36, present embodiment is described.
At first, with reference to Figure 36..Figure 36 is the pie graph of the CD media of present embodiment.The storage surface 401 of CD media shown in Figure 36 scribbles the material of phase change, orbital groove 0.32 μ m, and spiral fashion forms rail groove 1502..Be coated with the thick dielectric film of last layer 0.1mm on the storage surface again, when carrying out storing, regenerating, the laser of wavelength 405nm is by the camera lens irradiation of NA0.85.
Be located at the writing in the zone of interior week of user area, form one at least and be the rail groove 1502 of management information, this rail groove 1502 is connected with rail groove 402 in the user area shown in Figure 25.The rail groove 1502 that writes in the zone is same with rail groove 402, vibrates at interior all sides, outer circumferential side sigmoid curve in the cycle of rough 11.47 μ m.
Rail groove 1502 is to be made of continuously a plurality of positional information units or the positional information section that comprises a plurality of positional information units.Each position unit comprises a plurality of information units 408 of arranging along rail groove.Have the structure same at these somes groove 1502 that gets on the right track with rail groove 402.
In the present embodiment, positional information unit 1503 is showed by the vibration shape of the first half of secondary information unit 408, and management information unit 1505 is showed by the latter half of vibration shape of secondary information unit 408.
In the example of Figure 36, the positional information unit 503 of 1 bit position information of expression ' 1 ' or ' 0 ' is by the vibration storage in 16 cycles.More particularly, with interior circumferential displacement rectangle vibration performance ' 0 ', the huge vibration performance ' 1 ' of outer circumferentially displacement.In this example, in order to improve the reliability of signal regeneration, stride 16 vibration periods, form the vibration of same shape, all these all show with 1 bit position message unit 1503.
On the one hand, management information is by the combination of 2 kinds of above-mentioned vibrations, in 4 cycles of vibration, with the management information unit of 1 of ' 0 ' or ' 1 ' performance.The example of Figure 36, the management information unit of ' 0 ' → ' 0 ' → ' 1 ' → ' 1 ' 4 cycles of vibration performance ' 0 ', the administrative unit of ' 1 ' → ' 1 ' → ' 0 ' → ' 0 ' 4 cycles of vibration performance ' 1 '.That is to say that the vibration period shows 1 management information unit thus as the two-phase symbol of a unit in 4 cycles of vibration.In the example of Figure 36, the management information unit that each secondary information unit 408 storage is 4.The unit of two-phase symbol is not limited to the vibration in 2 cycles.The unit of two-phase symbol will be considered as management information, necessary quantity of information, and the fiduciary level that can detect determines later on really.When necessary quantity of information is fewer, can the fiduciary level of regeneration further be improved by the two-phase symbol of the vibration in 8 cycles as 1 unit adopted.And each vibration number that is included in the positional information unit of secondary information unit and management information unit is not subjected to the restriction of above-mentioned example yet, suitably determines on the basis of the overlapping consideration of reliability that positional information and management information are relevant.
By adopting above-mentioned two-phase symbol mode, the management information of storing each secondary information unit 408 is latter half of, and the number of the number of the vibration of performance ' 0 ' and the vibration of performance ' 1 ' equates.Its result is in the read-out position message unit, 16 vibration periods judge it is ' 0 ' or ' 1 ', by most decision principles, when adopting the mode of bit position message unit decision, the decision (most decision principle) of the content location information unit of management information is not influence fully.
The a plurality of bit position message units 1503 that obtain from a plurality of secondary information units, by the positional information of its reproduction position information unit (piece), and, by the management information of a plurality of management information unit 1505 regeneration disks.
In the past, during by embossing processing management information, the wavelength of the depth ratio reproducing laser of rail groove
When (λ) shallow, according to having or not of embossing, regenerated signal has the tendency of minimizing.On the other hand, in order to strengthen the regenerated signal amplitude of user profile, the degree of depth of wishing rail groove is in λ/12 degree, and is more shallow for well.Therefore, pay attention to the regeneration of user profile, the rail groove degree of depth is arranged under the situation of λ/12, the management information of regeneration embossing shape store is extremely difficult.
But according to present embodiment, since the combination of the sigmoid curve shape of foundation vibration, management information, even the degree of depth of rail groove is superficial, also can be with very high reliability regeneration management information.
Secondly with reference to Figure 39, the formation of optical disc storage regenerating unit is described.
The difference of the optical disc storage regenerating unit of Figure 39 and the device of Figure 29 is, it possesses from the output of regenerated signal handling part 802 and detects the management information unit detecting element 812 of management information unit and detect the management information detecting element 814 of management information from the management information unit that obtains.
Management information unit detecting element 812 is by constituting with the circuit of secondary information detecting element with spline structure, management information unit detecting element 812 detects has only the just output ' 1 ' of the precipitous vibration signal of rising displacement, detects and has only the just output ' 0 ' of the precipitous vibration signal of decline displacement.Management information detecting element 814 has identical formation with the positional information detecting element, and the secondary information interval that position-based information synchronization portion 808 generates regularly judges that secondary information is ' 1 ' or ' 0 ', detects management information.Management information is delivered to systems control division 810.
Like this,, not only can generate clock signal from the curve shape of rail groove according to present embodiment, can also calculated address information, management information.In the zone of these writing management informations, had better not write user data.In order user data not to be written to the boot section or the draw-out area of CD, should write management information in introducing district and draw-out area.
At the rail groove that does not write user data, user data can be not overlapping with regenerated signal, can extract positional information and management information highly reliably out from regenerated signal.Therefore in non-user area, can use the vibration wave figurate number of lacking than the user area to store one information.Therefore in the present embodiment,, reduce half than the user area for representing 1 secondary information ' 1 ' or ' 0 ' desired vibrational waveform quantity, and the reliability of regeneration is very high for representing that 1 bit position message unit, 1503 desired vibration wave figurate numbers are 18.
In non-user area, the sigmoid curve amount (through the direction vibration amplitude) of vibration that should writing management information also can bigger than the sigmoid curve amount of user area (such as increasing by 2 times).If when writing the regeneration of data vibration signal on the contrary and also not going wrong, the management information that should write afterwards etc. is stored on the rail groove 1502 also passable.
Secondly, with reference to Figure 37 A～37E, other example of management information storage scheme is described.
In the example of Figure 37 A, each vibrates 1 management information storage unit of 1 period allocated.Each vibrates the shape in 1 cycle and represents ' 1 ' or ' 0 '.Compare with the example of Figure 37, quantity of information can increase by 4 times.
In the example of Figure 37 B, each vibrates the management information unit of 1 period allocated position, and this point is the same with Figure 37 B, but respectively vibrating the shape in 1 cycle is expressed as ' B ', ' S ' this point difference.This example becomes easy from the identification with ' 1 ', ' 0 ' the secondary information that shows.
In the example of Figure 37 C, adopt two-phase symbol with 1 of 2 vibration period performance.Compare with the example of Figure 37, can increase by 2 times of quantity of information.
In the example of Figure 37 D, ' 1 ' in Figure 37 C example changed into ' B ', ' 0 ' changes ' S ' into.
In the example of Figure 37 E, by ' S ', ' B ', and ' 1 ', and ' 0 ' 4 kinds vibration shapes, be stored as 2 information of ' 11 ', ' 00 ', ' 01 ', ' 10 '.Because the reliability height is in various repeatedly vibration shapes of 2 vibration periods.
Secondly with reference to Figure 38.In the example shown in Figure 38, a positional information section 403 comprises 4 positional information units.And in 4 information units, in ' positional information ' of the positional information portion stored position information section 403 of positional information unit foremost, positional information portion management information in other 3 positional information units.Each position information unit has an identifying information, and it specifies in the information that positional information portion storing is ' positional information ' or management information.
As mentioned above, in continuous position information unit, the back of synchronous mark portion, when disposing accurate witness marker portion, use synchronous mark detect the result or accurately witness marker detect the result, positively detect the interval of positional information.And this occasion, use detecting of synchronous mark, clamp-on the position that detects of accurate witness marker, also can high precision carry out.Its result has improved the precision of storage starting position and storage end position, can rise to the reliability of positional information regeneration.
CD media of the present invention, the storage of above-mentioned positional information and synchronous mark realizes by varied orbit groove vibrational waveform, simultaneously as accurate witness marker, as mirror flag etc., be to cross over the different shape that has for the rail groove shape of positional information storage to form.Thus, the identification of scale value and accurate witness marker becomes easy synchronously.Its result, about positional information renovation process of the present invention and device, date storage method and device as announcement, and, position regeneration and data storage are carried out accurately with the result that detects who detects result and accurate witness marker of synchronous mark.
Utilize possibility on the industry
CD media of the present invention, a plurality of combination stored position informations of the vibrational waveform of rail groove etc. carried out in the fabrication phase, there is no need in the space of the specific region of rail groove setting for stored position information.And among the present invention, therefore the vibration that rail groove gives can easily form the stable clock signal with the single-frequency displacement.
By the present invention, provide a kind of CD media of high density canned data like this.
Claims (3)
1, a kind of CD media has rail groove, along described rail groove canned data,
Described rail groove comprises a plurality of unit intervals part of arranging on the described rail groove, and this a plurality of unit intervals part has the periodically side of displacement along described rail groove,
The side of described a plurality of unit intervals part, with single basic cycle displacement, described side is by being formed towards the periphery displacement of described CD media and towards the combination of the mutually different multiple weave mode of steepness of the interior Zhou Bianwei of described CD media,
Described unit interval part has with single basic cycle displacement and vibrational waveform that have a plurality of cycles,
Address information is represented in the combination of described vibrational waveform.
2, CD media according to claim 1 is characterized in that,
Each of described a plurality of unit intervals part is distributed secondary information,
Described secondary information is represented by the 1st side displacement waveform or the 2nd side displacement waveform, the rising ratio that described the 1st side displacement waveform is defined as signal waveform descends precipitous, and that suppression ratio rises is mild, and described the 2nd side displacement waveform is defined as the rising of signal waveform, and suppression ratio rises precipitous than descending mild.
3, CD media according to claim 1 is characterized in that,
The displacement of the side of described rail groove is from the displacement towards the outer circumferential side of interior all sides of CD media or CD media of the center line of described rail groove.
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| CNB018150454A Division CN1296906C (en) | 2000-09-01 | 2001-08-30 | Optical disc medium optical disc playback and recorder |
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| CN1838258A CN1838258A (en) | 2006-09-27 |
| CN100446091C true CN100446091C (en) | 2008-12-24 |
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| CNB2005101248927A Expired - Lifetime CN100446091C (en) | 2000-09-01 | 2001-08-30 | Optical disk medium, optical disk reproducing device and storage device |
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| CN2006101732534A Expired - Fee Related CN1975882B (en) | 2000-09-01 | 2001-08-30 | Optical disk medium and reproduction, storage and detection method |
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| CN104335275A (en) * | 2012-05-30 | 2015-02-04 | 索尼公司 | Optical information recording medium and optical information recording medium playback device |
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| WO2008078506A1 (en) * | 2006-12-26 | 2008-07-03 | Panasonic Corporation | Optical recording medium, method for manufacturing the optical recording medium, reproduction signal processing method and evaluation method |
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| JPH10124878A (en) * | 1996-10-14 | 1998-05-15 | Mitsubishi Electric Corp | Optical disk and its device |
| CN1208917A (en) * | 1997-08-16 | 1999-02-24 | Lg电子株式会社 | Information recording medium |
| JPH11175979A (en) * | 1997-12-12 | 1999-07-02 | Sony Corp | Clock generating device, clock generating method and optical disk |
| JP2000137930A (en) * | 1997-03-27 | 2000-05-16 | Sanyo Electric Co Ltd | Optical recording medium and optical reproducing device thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0786767B1 (en) * | 1996-01-26 | 2005-03-16 | Sharp Kabushiki Kaisha | Optical recording medium and optical recording/reproducing device, and manufacturing method of optical recording medium |
| JP3850060B2 (en) * | 1996-02-13 | 2006-11-29 | 三菱電機株式会社 | Optical disc and optical disc apparatus |
-
2001
- 2001-08-30 RU RU2003108875A patent/RU2284588C2/en not_active IP Right Cessation
- 2001-08-30 CN CN2006101732534A patent/CN1975882B/en not_active Expired - Fee Related
- 2001-08-30 CN CNB2005101248927A patent/CN100446091C/en not_active Expired - Lifetime
-
2003
- 2003-02-24 ZA ZA200301470A patent/ZA200301470B/en unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10124878A (en) * | 1996-10-14 | 1998-05-15 | Mitsubishi Electric Corp | Optical disk and its device |
| JP2000137930A (en) * | 1997-03-27 | 2000-05-16 | Sanyo Electric Co Ltd | Optical recording medium and optical reproducing device thereof |
| CN1208917A (en) * | 1997-08-16 | 1999-02-24 | Lg电子株式会社 | Information recording medium |
| JPH11175979A (en) * | 1997-12-12 | 1999-07-02 | Sony Corp | Clock generating device, clock generating method and optical disk |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104335275A (en) * | 2012-05-30 | 2015-02-04 | 索尼公司 | Optical information recording medium and optical information recording medium playback device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1975882B (en) | 2012-02-29 |
| ZA200301470B (en) | 2004-02-12 |
| RU2284588C2 (en) | 2006-09-27 |
| CN1975882A (en) | 2007-06-06 |
| CN1838258A (en) | 2006-09-27 |
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