CN101154396B - Optical disc and optical disc device - Google Patents
Optical disc and optical disc device Download PDFInfo
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- CN101154396B CN101154396B CN2007101695455A CN200710169545A CN101154396B CN 101154396 B CN101154396 B CN 101154396B CN 2007101695455 A CN2007101695455 A CN 2007101695455A CN 200710169545 A CN200710169545 A CN 200710169545A CN 101154396 B CN101154396 B CN 101154396B
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Abstract
In a multilayer optical disc having information layers conforming to a plurality of different optical disc standards, because the type of each information layer is not recorded in the other information layers, in read and write operations by a compatible optical disc device conforming to a plurality of optical disc standards, every time the information layer being accessed changes, it has been necessary to read the type of the information layer and select a method of generating a tracking error signal adapted to the type of information layer, so access has taken time. In order to solve the above problem, in the optical multilayer disc according to the present invention, having information layers conforming to a plurality of different optical disc standards, in an area in one of the information layers, information about the other information layers is recorded. The time required to access the other information layers can be reduced by using this information to select a tracking error signal generating method.
Description
The application divides an application, and the application number of original bill application is 200580026036.6, and international application no is PCT/JP2005/015160, and the applying date is on August 19th, 2005, and denomination of invention is " CD and an optical disc apparatus ".
Technical field
The present invention relates to the Information Level multilayer of a plurality of different discs standards is turned to the CD of a dish and the optical disc apparatus that this CD is carried out the information record or reproduces.
Background technology
In information record field, carrying out research about CD.But this CD be owing to can carry out recoding/reproduction, can cheap realize the high capacity file and have the medium that reproduces tailored version, afterthought type rewriting type according to purposes in non-contacting mode, thereby uses from industry and civilianly to be used on a large scale.
The high capacity of above-mentioned various CDs is by the size that is the information that rail-like writes that reduces to coil, and adopts and become at record and convergent point size that the object lens of the short wavelengthization of the laser of the light source that uses in reproducing and high-NA reduce on the focal plane reaches.
For example, at CD (Compact Disc: compact disk), the thickness that becomes the optic disc base board of light-transmitting layer is about 1.2mm, and optical maser wavelength is about 780nm, and the numerical aperture of object lens (NA) is 0.45, capacity is 650MB, and in DVD (digital multi-purpose CD), the thickness that becomes the optic disc base board of light-transmitting layer is about 0.6mm, and optical maser wavelength is about 650nm, NA is 0.6, and capacity is 4.7GB.DVD is that the dish that 2 optic disc base boards with for example about 0.6mm of thickness are bonded as 1.2mm thickness uses.
And; at highdensity BD (Blu-ray Disc: Blu-ray Disc); employing makes the thickness of the protective seam that is arranged on the light-transmitting layer on the optical recording layer be thinned to the CD of 0.1mm, by making optical maser wavelength be about 405nm and making NA 0.85 realize the high capacity more than the 23GB.
Like this, when CD carries out high capacity, CD, DVD, the such various compact disk standards of BD have been formulated.On the other hand, but optical disc recording/reproduction device generally is the device with interchangeability of the CD of a plurality of standards of record-playback.
For example, under the situation of DVD record reproducing device, have except the record-playback of DVD, can also carry out the goods of the record-playback of CD, under the situation of BD record reproducing device, have the goods of the record-playback of the record-playback of the record-playback that can carry out BD, DVD and CD.These have interchangeability record reproducing device since can record-playback the CD of the existing standard that had of user, thereby convenience height is being brought into play important effect aspect the popularizing smoothly of new standard.
These dishes are the dishes according to various standards, yet in order to improve user's convenience, the Information Level multilayer of developing a plurality of different discs standards of sening as an envoy to turns to the CD (for example, with reference to patent documentation 1) of a dish.
Patent documentation 1: TOHKEMY 2004-95005 communique
In above-mentioned CD, there is following problem, that is: when just carrying out access at certain Information Level, because unclear other Information Level that whether do not exist, thereby under the situation of the information of being badly in need of reading or write down other Information Level, need the time at the access of this other specified Information Level.
And, in above-mentioned CD, also there is following problem, that is: the kind owing to certain Information Level is not recorded in other Information Level, thereby when using the exchange optical disc apparatus corresponding to read and write with a plurality of compact disk standards, whenever just when the Information Level of access changes, need that all this Information Level is carried out access and read its kind, select the generation method of the tracking error signal corresponding with the kind of Information Level afterwards, access needs the time.
Summary of the invention
In order to address the above problem, the objective of the invention is in the CD of the Information Level multiple stratification that makes a plurality of different discs standards of foundation, to shorten the access time.
The present invention is a kind of optical disc apparatus, it carries out the record or the reproduction of CD, this CD has a plurality of Information Levels, these a plurality of Information Levels have the track by laser scanning, the highest Information Level of recording density of above-mentioned a plurality of Information Levels has the management area, this management area records about the kind of the multiple Information Level except that the Information Level with this management area and the information that has or not, record its kind and the above-mentioned multiple Information Level that has or not is to be foundation with recording density mutual different a plurality of CD specifications respectively in above-mentioned management area, it is characterized in that above-mentioned optical disc apparatus has: the unit that the Information Level with above-mentioned management area is carried out access; Read the unit of information of management area of the Information Level of above-mentioned institute access; And from the information of above-mentioned management area, extract out above-mentioned about multiple Information Level kind and the unit of the information that has or not, above-mentioned optical disc apparatus carries out access to above-mentioned Information Level according to the above-mentioned kind and the information that has or not about multiple Information Level of extracting out.
According to the present invention, in the CD of the Information Level multiple stratification that makes a plurality of different discs standards of foundation, the access time can be shortened.
Description of drawings
Fig. 1 is the skeleton diagram of state that the CD in the embodiment 1 is shown and the Information Level L1 of this CD is carried out the optical disc apparatus of access.
Fig. 2 is the skeleton diagram of state that the CD in the embodiment 1 is shown and the Information Level L2 of this CD is carried out the optical disc apparatus of access.
Fig. 3 is the skeleton diagram of state that the CD in the embodiment 1 is shown and the Information Level L3 of this CD is carried out the optical disc apparatus of access.
Fig. 4 is the skeleton diagram of management area that the Information Level L1 of the CD in the embodiment 1 is shown.
Fig. 5 is the skeleton diagram that the optical disc data structure of the information field that comprises the management area in the embodiment 1 is shown.
Fig. 6 is the concept map of the information field in the management area in the embodiment 1.
Fig. 7 be in the embodiment 1 Information Level L2 be the information that rail-like writes and the skeleton diagram of convergent point.
Fig. 8 be in the embodiment 1 Information Level L3 be the information that rail-like writes and the skeleton diagram of convergent point.
Fig. 9 is the process flow diagram that the order of the kind of information that reads each Information Level in the embodiment 1 is shown.
Figure 10 illustrates the process flow diagram that the kind of information of utilizing each Information Level in the embodiment 1 is reproduced the order of other Information Level.
Figure 11 is the skeleton diagram of management area that the Information Level L1 of the CD in the embodiment 2 is shown.
Figure 12 is the concept map in the management area in the embodiment 2.
Figure 13 is the concept map in the management area in the embodiment 3.
Symbol description
1: CD; 2a: bluish violet semiconductor laser light resource; 2b: red semiconductor LASER Light Source; 2c: infrared semiconductor laser light source; 3a: the light beam of bluish violet semiconductor laser light resource; 3b: the light beam of red semiconductor LASER Light Source; 3c: the light beam of infrared semiconductor laser light source; 4a, 4b, 4c: collimation lens; 5a, 5b, 5c: prism; 6: object lens; 7a: the convergent point of bluish violet semiconductor laser light resource; 7b: the convergent point of red semiconductor LASER Light Source; 7c: the convergent point of infrared semiconductor laser light source; 8: the sensing lens; 9: photodetector; 10: signal processing unit; 11: image process unit; 12: optical disc apparatus; 13: main frame; 14,14a: management area; 15,15a: user data area; 16: information field; 17: bank; 18: groove; 19: record mark; 20: pit: 21: the viewing area; 22: category regions.
Embodiment
Fig. 1 to Fig. 3 is the skeleton diagram of state that the CD in the embodiments of the present invention 1 is shown and the Information Level of this CD has been carried out the optical disc apparatus of access, and Fig. 4 is the skeleton diagram of management area that the Information Level L1 of the CD among Fig. 1 is shown.Fig. 5 is the skeleton diagram that the optical disc data structure of the information field that comprises the management area is shown.Fig. 6 is the concept map of the information field in the management area.Fig. 7 be Information Level L2 be the information that rail-like writes and the skeleton diagram of convergent point, Fig. 8 be Information Level L3 be the information that rail-like writes and the skeleton diagram of convergent point.Fig. 9 is the process flow diagram that the order of the kind of information that reads each Information Level is shown.Figure 10 illustrates the process flow diagram that the kind of information of utilizing each Information Level is reproduced the order of other Information Level.
Below, use accompanying drawing that embodiments of the present invention 1 are described.In Fig. 1, CD 1 is provided with Information Level L1, L2, the L3 of a plurality of different discs standards, and this Information Level L1, L2, L3 are stacked on the thickness direction of CD 1.Information Level L1, L2, L3 are on the position of 0.1mm, 0.6mm and 1.2mm by the distance that this order is configured in respectively from the surface to the Information Level.And these Information Levels L1, L2, L3 satisfy the compact disk standards of BD, DVD, CD respectively by this order, and Information Level L1 is the highest layer of recording density, and Information Level L3 is the minimum layer of recording density.Here, to being respectively that the situation of reproducing tailored version, recordable type, reproduction tailored version describes.
The state representation of Fig. 1 is carried out the state of access to Information Level L1, become directional light from light beam 3a by collimation lens 4a as the bluish violet semiconductor laser light resource 2a outgoing of about 405nm of minimal wave length, by prism 5a reflection, on Information Level L1, be converged to convergent point 7a by object lens 6 then.
Reenter by Information Level L1 beam reflected 3a and to be mapped to object lens 6.Afterwards, see through prism 5a, 5b, 5c, shine on the photodetector 9 by sensing lens 8.
9 pairs of light beams that received of photodetector carry out opto-electronic conversion and output to signal processing unit 10.The luminous quantity of signal processing unit 10 control light source 2a, perhaps the tracking error signal of the relative position error of the track of generation expression convergent point and Information Level is perhaps exported the information after the signal Processing to image process unit 11.Image process unit 11 carries out the image processing line output of going forward side by side.
The state representation of Fig. 2 is carried out the state of access to Information Level L2, become directional light from the light beam 3b of the red semiconductor LASER Light Source 2b outgoing of the about 650nm of wavelength by collimation lens 4b, by prism 5b reflection, on Information Level L2, be converged to convergent point 7b by object lens 6 then.At this moment, light beam 3b sees through Information Level L1.Therefore, Information Level L1 considers to set material and structure at the physical characteristics of the transmissivity of the light beam of the about 650nm of wavelength and reflectivity etc., so that do not influence the access of Information Level L2.
Reenter by Information Level L2 beam reflected 3b and to be mapped on the object lens 6.Afterwards, see through prism 5a, 5b, 5c, shine on the photodetector 9 by sensing lens 8.Because signal processing unit 10 and image process unit 11 carry out same action, thereby omit.In Fig. 2, that signal processing unit 10 is controlled is light source 2b.
The state representation of Fig. 3 has been carried out the state of access to Information Level L3, become directional light from the light beam 3c of the infrared semiconductor laser light source 2c outgoing of the about 780nm of wavelength by collimation lens 4c, by prism 5c reflection, on Information Level L3, be converged to convergent point 7c by object lens 6 then.
At this moment, light beam 3c sees through Information Level L1, L2.Therefore, Information Level L1, L2 consider to set material and structure at the physical characteristics of the transmissivity of the light beam of the about 780nm of wavelength and reflectivity etc., so that do not influence the access of Information Level L3.
3b incides object lens 6 once more by Information Level L2 beam reflected.Afterwards, see through prism 5a, 5b, 5c, shine on the photodetector 9 by sensing lens 8.Because signal processing unit 10 and image process unit 11 carry out same action, thereby omit.In Fig. 3, that signal processing unit 10 is controlled is light source 2c.
In Fig. 4 and Fig. 5, the interior management area 14 of Information Level L1 that is arranged on above-mentioned CD 1 is arranged on interior all positions of CD 1, and management area 14 is to be outside equipped with user data area 15.And, in the information field 16 of management area 14, have the kinds of information of each Information Level of expression.Optical disc apparatus 12 obtains the kinds of information of each Information Level of expression by reading this information field 16.
Fig. 6 is the concept map of information field 16.Each region S 1, S2, S3 in the information field 16 is respectively the position of the kind of expression Information Level L1, L2, L3.Region S 1, S2, S3 constitute by 2 respectively, use to add up to 6.Last rheme is that reproducing under the situation of tailored version is 01 at this Information Level, is to be 10 under the situation of recordable type at this Information Level.Do not represent with 00 under the situation of Information Level having.Therefore, the region S 1 in the present embodiment 1, S2, S3 are registered as 01,10,01 respectively.
Fig. 7 illustrate Information Level be recordable type be information that rail-like writes and the figure of convergent point 7b.In recordable type, has the track that is called as bank 17 and groove 18.Utilize the chemical change and the change of shape of material to come information as record mark 19 records.Under the situation of the Information Level of recordable type, known differential recommending (Differential Push-Pull) method (DPP method) is used in the generation of tracking error signal.This method is light beam to be divided into 3 bundles be focused on the Information Level, and makes its reflected light cut apart photodetector by 32 to receive the method for carrying out computing and obtaining tracking error signal.
Fig. 8 illustrate Information Level be reproduce tailored version be information that rail-like writes and the figure of convergent point 7c.In reproducing tailored version, use the small hole recorded information that is called as pit 20.In this case, the generation of tracking error signal uses known differential phae to detect (Differential PhaseDetection) method (DPD method).This method is to make beam convergence on Information Level, and makes its reflected light cut apart photodetector by 14 to receive the method for carrying out computing and obtaining tracking error signal.
In Fig. 9, when being inserted into CD 1 in the optical disc apparatus 12 (ST1), optical disc apparatus 12 is by reading the information field 16 (ST2) in the management area 14 in the Information Level L1 on the above-mentioned CD 1, obtain the kinds of information of expression each Information Level L1, L2, L3, this information is remained on signal processing unit 10 interior (ST3) and finishes (ST4), be in the waiting status of wait from the indication of main frame 13.
In Figure 10, optical disc apparatus 12 is at the reproduction indication (ST10) from the Information Level L2 of main frame 13, the kind (ST11) of reading the Information Level L2 of the inside that remains on signal processing unit 10 as mentioned above in order.Because Information Level L2 reproduces tailored version (ST12 for " vacation " (FALSE)), but recordable type (ST13 be " very " (TRUE)), thereby selection is suitable for the DPP method of the Information Level L2 of recordable type, set the laser power of the laser instrument of the wavelength that is suitable for Information Level L2 simultaneously, generate tracking error signal (ST14), carry out information regeneration (ST15) from Information Level L2.
Equally, optical disc apparatus 12 is also at the reproduction indication (ST10) from the Information Level L3 of main frame 13, according to the kind (ST11) of the Information Level L3 that call over the inside that as mentioned above remains on signal processing unit 10 identical with Figure 10.Because Information Level L3 reproduces tailored version (ST12 is " very "), thereby select to be suitable for to reproduce the DPD method of the Information Level L3 of tailored version, set the laser power of the laser instrument of the wavelength that is suitable for Information Level L3 simultaneously, generate tracking error signal (ST16), carry out information regeneration (ST17) from Information Level L3.
At reproduction indication from main frame 13, in the kind of the Information Level L3 of the inside that remains in signal processing unit 10 neither reproduce tailored version, neither recordable type (ST12, ST13 all are the situation of " vacation "), promptly be under the situation of the information that can not discern by optical disc apparatus, have the Information Level that reproduces indication be can not access the meaning turn back to main frame 13 (ST18) and finish (ST19), wait for next indication from main frame 13.
In addition, in Figure 10, the kind of judging Information Level is to reproduce among tailored version or the step ST12 of recordable type and the ST13 which side formerly can.
And, figure 10 illustrates the situation that main frame 13 reproduces indication, yet even writing down under the situation of indication, too according to the kinds of information of representing Information Level, Information Level at the record indication is arranged can shorten the access time, and can carry out suitable operation of recording.
In the present embodiment, in the CD of the Information Level multiple stratification that makes a plurality of different discs standards of foundation, the kinds of information of other Information Level of record expression, thus make optical disc apparatus discern the kind of other Information Level easily, can shorten the access time.
And, this information is recorded in the management area of the highest Information Level of recording density, thereby the frequency of utilization of expecting this Information Level is the highest, thereby optical disc apparatus can read and keep this information reliably.
And, under the situation of this CD being carried out the information record and reproducing, optical disc apparatus can be according to the kinds of information of these Information Levels of expression, the laser power of the laser instrument of the wavelength of the layer that is suitable for wanting access is redefined for suitable value, and be predetermined the expression convergent point and be information that rail-like writes generation method, thereby can shorten the access time at the tracking error signal that crosses the relative position error on the direction of a plurality of tracks.
Embodiment 2
That embodiments of the present invention 2 and embodiments of the present invention 1 are identical is Fig. 1 to Fig. 5 and Fig. 7 to Figure 10, and use in the zone in the management area among Fig. 6 of different is embodiment 1.
In Figure 11, CD is made of management area 14a that is positioned at all sides and the user data area 15a that is positioned at outer circumferential side, the category regions 22 that is provided with the viewing area 21 of the information that has or not that records other Information Level of expression and records the kinds of information of other Information Level of expression in the 14a of management area.In Figure 12, regional T2, the T3 of viewing area 21 be the information that has or not of Information Level L2, the L3 shown in the record sheet diagrammatic sketch 1 respectively.Zone T4 is illustrated in and does not make illustrated foundation in the CD 1 the blue violet semiconductor laser of the about 405nm of wavelength having or not as the Information Level of other compact disk standards beyond the BD of light source or other standard that will develop future.Zone T2, T3, T4 have 1 Information Level respectively, and viewing area 21 constitutes by adding up to 3.Above-mentioned everybody respectively with 1 and 0 situation of representing that the situation of Information Level is arranged and not having Information Level.
In Figure 12, regional U2, the U3 of category regions 22, U4 are associated accordingly with regional T2, the T3 of viewing area 21, the Information Level that T4 represents, are the zones that records the kinds of information of each Information Level of expression.That is, exist in regional T2, T3, T4 under the situation of Information Level (position 1), regional U2, U3, U4 represent the kind of these Information Levels respectively.Zone U2, U3, U4 have 2 information respectively, and category regions 22 constitutes by adding up to 6.Above-mentioned each 2 is to represent with 00 when reproducing tailored version at Information Level, represents with 01 when being the afterthought type, represents with 10 when being rewriting type.The DVD-R that can not rewrite but the afterthought type comprises afterthought and+R and their double-deck standard.And, rewriting type comprise DVD-RW and+double-deck standard and the DVD-RAM of RW.In any one party of regional T2, T3, T4, do not exist under the situation of Information Level (position 0), 00 distribute to regional U2, U3, the U4 corresponding to what be equivalent to reserve (preparation is regional) with this zone.In this case, on the surface, when Information Level is the reproduction tailored version, have identical position, yet any one party of optical disc apparatus in regional T2, T3, T4 is under the situation of position 0, do not read regional U2, U3, the U4 corresponding, thereby can not have problems especially with this zone.Perhaps can distribute position beyond above-mentioned (for example 11).
Optical disc apparatus by reading regional T2, T3, the T4 of the viewing area 21 in the management area 14a in the Information Level L1 on the CD, obtains expression Information Level L2, L3 and according to the information that has or not of the Information Level of other standards when being inserted with CD.Then, optical disc apparatus has a region representation to exist under the situation of corresponding Information Level (position 1) in this zone T2, T3, T4, read regional U2, U3, the U4 of the category regions 22 in the 14a of management area, obtain the kinds of information of expression Information Level, and this information is remained in the signal processing unit 10.Action afterwards is identical with flow process shown in Figure 10.
In addition, optical disc apparatus only can be designed to exist under the situation of Information Level (position 1) in the information representation that obtains from regional T2, T3, T4, could only read corresponding information from regional U2, the U3 of category regions 22, U4.Yet optical disc apparatus can be designed to, no matter the information that obtains from regional T2, T3, T4 is that expression has Information Level or expression does not have Information Level, all reads regional U2, U3, the U4 of category regions 22.
In addition, there be the Information Level corresponding with above-mentioned zone T4, and this Information Level is that foundation is under the situation of the blue violet semiconductor laser of the about 405nm of wavelength as the Information Level of the compact disk standards beyond the BD of light source, comprise with as (2 of the corresponding a plurality of Information Levels of about 405nm of minimal wave length, be Information Level L1 and the Information Level corresponding with regional T4), and above-mentioned viewing area 21 and category regions 22 are arranged at least in the Information Level L1.Yet, not only can be arranged in the Information Level L1, and can be arranged in the both sides of Information Level L1 and the Information Level corresponding with regional T4.
And above-mentioned zone T4 and regional U4 can be used as the preparation zone and leave a blank and do not put into special information, use for the situation of formulating in the future new standard.In this case, viewing area 21 and category regions 22 keep the information of two kinds of Information Levels of Information Level L2, L3.
And, can classify according to the structure kind of information track for 2 that distribute to the regional U2 corresponding with the DVD layer.In this case, can classify according to the periodic structure of the information track of swing (wobble) frequency etc.For example, do not distribute 00 when can not have the reproduction tailored version of DVD-ROM etc. of swing only there being forward located depression, when DVD-R that has swing and DVD-RW, distribute 01, there is swing but hunting frequency distributes 10 during than high DVD+R of DVD-R and DVD-RW and DVD+RW, departing from and be formed on bank/groove helical structure and distribute 11 when not having the DVD-RAM of swing towards radial direction at head.Under the situation of DVD layer, each is classified and identical form according to it because the periodic structure of information track uses, thereby can before being carried out access, the DVD layer set the characteristic of the Wobble signal detection circuit (circuit of the frequency of sense cycle structure) of bandpass filter etc., can be controlled to be desired value to the dish rotating speed apace, can shorten the access time.
In the present embodiment, in the CD of the Information Level multiple stratification that makes a plurality of different discs standards of foundation, the information that has or not of other Information Level of record expression, thus make optical disc apparatus discern having or not of other Information Level easily, can shorten the access time.
And, in the management area of CD, with be arranged in the 21 minutes category regions 22 of the kinds of information that stores the expression Information Level of the viewing area of the information that has or not that stores other Information Level of expression, the information of viewing area 21 is associated with the information of category regions 22, and the information of the information of viewing area 21 and category regions 22 has hierarchy.Therefore, be provided with other regional situation or append under the situation of other kinds of information layer future in management area 15, can guarantee to utilize the extendability of hierarchy.
And, these information are recorded in the management area of the highest Information Level of recording density, thereby the frequency of utilization of expecting this Information Level is the highest, thereby optical disc apparatus can read and keep these information reliably.
And, under the situation of this CD being carried out the information record and reproducing, optical disc apparatus can be according to above-mentioned information, the laser power of the laser instrument of the wavelength of the layer that is suitable for wanting access is redefined for suitable value, and be predetermined the expression convergent point and be information that rail-like writes generation method, thereby can shorten the access time at the tracking error signal that crosses the relative position error on the direction of a plurality of tracks.
Embodiment 3
Embodiment 3 are the kind of Information Level in CD 1 kinds of comprising the L1 layer interior be at most the mode of 2 kinds situation.That identical with embodiments of the present invention 2 is Fig. 1 to Fig. 5 and Fig. 7 to Figure 11, the viewing area 21 among Figure 12 of different is embodiment 2 and the use of category regions 22.
In Figure 13, regional T2, T3, the T4 of viewing area 21 are identical with Figure 12.
Exist under the situation of other Information Level beyond Information Level L1, the regional V1 of category regions 22 represents the kind of this other Information Level.Category regions 22 only has the information of 2 regional V1.Above-mentioned 2 is to represent with 00 when reproducing tailored version at Information Level, represents with 01 when being the afterthought type, represents with 10 when being rewriting type.The afterthought type comprise DVD-R and+R and their double-deck standard etc.And, heavier types comprise DVD-RW and+the double-deck standard of RW and DVD-RAM etc.
For example, be all to be to reproduce tailored version and do not have other layers that (under situation T4=0), regional V1 be 00 for T2=1, T3=1 at Information Level L1 by individual layer or double-deck recordable type, Information Level L2, the L3 that constitutes.And, be to be to reproduce tailored version and do not have other layers that (under situation T4=0), regional V1 be 00 for T2=1, T3=0 by individual layer or double-deck reproduction tailored version, the Information Level L2 that constitutes at Information Level L1.
Like this, in CD 1, have position 1 and represent that this Information Level of 1 is under a kind the situation regional T2, the T3 of viewing area 21, at least one side among the T4, perhaps the zone for position 1 in regional T2, T3, T4 only is under the situation of individual layer, can make category regions 22 is 2, thereby compare with above-mentioned embodiment 2, have the effect of saving information bit.Particularly, accord with the demands of the market owing to expect only to exist any one party among Information Level L2, the L3 and this layer is used as the CD that reproduces tailored version, thereby be to reproduce under the situation of CD of tailored version at only manufacturing/marketing information layer L2 or L3, the regional V1 of category regions 22 only 2 just enough.
In addition, as shown in Embodiment 2, regional V1 can classify according to the structure kind of the information track that has or not etc. of swing.
The regional V1 that shows category regions 22 in the present embodiment only is the situation of 2 information, yet in order further to save information bit, can be only to be 1 information.In this case, for example, reproduce tailored version and can represent that in other cases, promptly afterthought type or rewriting type can be represented with 1 with 0.Perhaps, can classify according to the structure kind of information track as the situation that not have to swing being set at 0, the situation that swing is arranged being set at 1 etc.
And, like this, at the regional V1 of the information of storage representation Information Level is 1 and standby and do not put under the situation of special information as the preparation zone the regional T4 of the viewing area 21 of Figure 13, because this zone T4 originally just is assigned with 1, thereby can be distributing to this zone T4 as 1 of the regional V1 of the information of this Information Level of expression.Like this, can further save information bit, and can be with viewing area 21 and category regions 22 in abutting connection with configuration, the result can further shorten access time of optical disc apparatus.
In addition, other effects are identical with the effect shown in embodiment 1 and 2.
Embodiment 4
Embodiment 2 and 3 category regions 22 are considered this effective utilization in the future, also can be all as preparing region allocation 00 or 0, and do not distribute to any information especially.And, as embodiment 3 illustrated, be to reproduce under the situation of CD of tailored version at only manufacturing/marketing information layer L2, L3, also have the situation that can not distribute to the kinds of information of expression Information Level category regions 22 especially.
Yet, manufacturing/marketing information layer L2, L3 are the CDs that reproduces tailored version having not only in the future, but also under the situation of the turn of the market of the CD of the various mixed types of manufacturing/sale etc., when when position that is necessary to the kind use classes zone 22 of expression Information Level, in order to ensure with Information Level L2, L3 be the interchangeability of reproducing the CD of tailored version, the 00 or 0 reproduction tailored version of distributing to the maximum kind of use of distributing to category regions 22.And,,, also be necessary to manage to give over to preparation zone etc. distributing to 00 or 0 of category regions 22 according to same reasons even under the situation of the position that this is used as fully other project of expression.
Under the situation of present embodiment, adopted the information of the viewing area of the information that has or not that only stores other Information Level of expression, yet for optical disc apparatus, because can be according to the having or not of this other Information Level of information Recognition, thereby help to shorten the access time.
Claims (4)
1. optical disc apparatus, it carries out the record or the reproduction of CD, and this CD has a plurality of Information Levels, and these a plurality of Information Levels have the track by laser scanning,
The highest Information Level of recording density of above-mentioned a plurality of Information Levels has the management area, and this management area records about the kind of the multiple Information Level except that the Information Level with this management area and the information that has or not,
Record its kind and the above-mentioned multiple Information Level that has or not is to be foundation with recording density mutual different a plurality of CD specifications respectively in above-mentioned management area, it is characterized in that,
Above-mentioned optical disc apparatus has:
Information Level with above-mentioned management area is carried out the unit of access;
Read the unit of information of management area of the Information Level of above-mentioned institute access; And
From the information of above-mentioned management area, extract out above-mentioned about multiple Information Level kind and the unit of the information that has or not,
Above-mentioned optical disc apparatus carries out access to above-mentioned Information Level according to the above-mentioned kind and the information that has or not about multiple Information Level of extracting out.
2. optical disc apparatus according to claim 1 is characterized in that, above-mentioned optical disc apparatus is above-mentioned about the kind of multiple Information Level and the information that has or not according to what extract out, selects wavelength to be suitable for wanting the laser of the Information Level of access.
3. optical disc apparatus according to claim 1 is characterized in that, above-mentioned optical disc apparatus is above-mentioned about the kind of multiple Information Level and the information that has or not according to what extract out, sets the laser power of laser that wavelength is suitable for wanting the Information Level of access.
4. according to each described optical disc apparatus in the claim 1 to 3, it is characterized in that the Information Level with above-mentioned management area is by comparing the shortest laser scanning of wavelength with the multiple Information Level in addition of the Information Level with this management area.
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| JP2005039026 | 2005-02-16 | ||
| JP2005-039026 | 2005-02-16 | ||
| JP2005043131A JP3812584B1 (en) | 2005-02-16 | 2005-02-18 | Optical disc and optical disc apparatus |
| JP2005043131 | 2005-02-18 | ||
| JP2005-043131 | 2005-02-18 |
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| CN200580026036.6A Division CN101015013A (en) | 2005-02-16 | 2005-08-19 | Optical disk and optical disk device |
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| CN101154396A CN101154396A (en) | 2008-04-02 |
| CN101154396B true CN101154396B (en) | 2010-06-09 |
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| CN200580026036.6A Pending CN101015013A (en) | 2005-02-16 | 2005-08-19 | Optical disk and optical disk device |
| CN2007101695455A Active CN101154396B (en) | 2005-02-16 | 2005-08-19 | Optical disc and optical disc device |
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| CN2007101695421A Active CN101154395B (en) | 2005-02-16 | 2005-08-19 | Optical disc and optical disc device |
| CN200580026036.6A Pending CN101015013A (en) | 2005-02-16 | 2005-08-19 | Optical disk and optical disk device |
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| US8755258B2 (en) | 2005-02-16 | 2014-06-17 | Mitsubishi Electric Corporation | Optical disc and optical disc device |
| CN101154395B (en) * | 2005-02-16 | 2012-07-04 | 三菱电机株式会社 | Optical disc and optical disc device |
| JP5241569B2 (en) * | 2009-03-05 | 2013-07-17 | 株式会社日立製作所 | Optical disc recording apparatus, optical disc reproducing apparatus, information recording method, and information reproducing method |
| JP2011048868A (en) * | 2009-08-26 | 2011-03-10 | Hitachi-Lg Data Storage Inc | Focus jump method and optical disk device |
| EP2290644A3 (en) * | 2009-08-28 | 2011-03-30 | Hitachi Consumer Electronics Co., Ltd. | Optical disc, optical disc reproducing apparatus, optical disc apparatus, reproducing method and recording method |
| EP4036380B1 (en) * | 2019-12-11 | 2023-08-30 | Mitsubishi Heavy Industries, Ltd. | Turbine stator vane assembly and steam turbine |
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