CN101051482A - Information recording medium, recording apparatus, reproduction apparatus, recording method, and reproduction method - Google Patents

Abstract

An information recording medium is provided, which comprises a plurality of recording layers and a first disc information area for storing parameters relating to access to the plurality of recording layers and formats relating to the plurality of recording layer. The first disc information area is provided in a first recording layer which is one of the plurality of recording layers.

Description

Information recording medium, recording unit, reproducer, recording method and reproducting method

The application Chinese patent application No.03805686.0 of the same name that to be applicant Panasonic Electric Equipment Industrial Co.,Ltd submit on January 20th, 2003 divides an application.

Technical field

The present invention relates to a kind of information recording medium that comprises at least two recording layers, record information to the method and apparatus on this media, and be used for the method and apparatus of from this media information reproduction.

Background technology

In recent years, various information recording mediums that can the recoding/reproduction bulk information have been developed.CD is exactly one of them.One of huge capacity compact discs are the both-sided optical discs that comprises two CDs that connect together, can recoding/reproduction information on each at these two CDs., often need random-access application such as computing machine for some, but recreation or the like needs a kind of high power capacity the single face and the random-access CD that do not need to spin upside down.

In order to address that need (high power capacity, random access, and single face), it is contemplated that single CD comprises at least two recording layers (this CD can be called as multiplayer optical disk), but on its single recoding/reproduction information.Fig. 7 shows the structure that a kind of one side comprises the CD 700 of two recording layers.

This CD 700 comprises 704, the first substrates 705 of first recording layer, binder resin 703, the second substrates 701 and second recording layer 702.Each substrate all is equipped with pilot hole 706.Second recording layer 702 comprises optical disc information district 707 and data field 710.First recording layer 704 comprises optical disc information district 711 and data field 714.

First substrate 705 and second substrate 701 are made by polycarbonate resin or analog, are used for protecting respectively first recording layer 704 and second recording layer 702.Optical disc information district 707 is for only reproducing the district, write down this type of information of laser energy such as irradiation second recording layer 702 or the like in this zone.Optical disc information district 711 is also for only reproducing the district, write down this type of information of laser energy such as irradiation first recording layer 704 or the like in this zone.

In CD 700, for example, at first on first recording layer 704, reproduce, then on second recording layer 702, reproduce immediately.In this case, reproduce operation with following order: the information of from optical disc information district 711, reproducing the laser energy of expression irradiation first recording layer 704; On data field 714, reproduce; From optical disc information district 707, reproduce the information of the laser energy of expression irradiation second recording layer 702; On data field 710, reproduce.Alternatively, successively in optical disc information district 711, optical disc information district 707, operation is reproduced on the data field 710 in data field 714.Therefore, in CD 700, must be from two optical disc information districts information reproduction.Therefore, take a long time the parameter and the format information that reproduce CD 700, as laser energy or the like.

Summary of the invention

According to an aspect of the present invention, a kind of information recording medium comprises a plurality of recording layers and the first dish block of information, and this first dish block of information is used for storing about the parameter of these a plurality of recording layers of visit and the form of relevant these a plurality of recording layers.This first dish block of information is to provide in first recording layer as one of these a plurality of recording layers.

In one embodiment of the invention, distribute the address to give this first recording layer.Parameter comprises that expression is used for shining the second irradiation energy information that the first irradiation energy information of laser energy value of this first recording layer and expression are used for shining the laser energy value of another recording layer in these a plurality of recording layers.The regional assigned address of the storage first irradiation energy information is less than the regional assigned address of the storage second irradiation energy information in the first dish block of information in the first dish block of information.

In one embodiment of the invention, this information recording medium also comprises the second optical disc information district that is used for storing with the first dish block of information identical information.This second optical disc information district provides in second recording layer, and this second recording layer is an another one in these a plurality of recording layers.

In one embodiment of the invention, this first recording layer is one of these a plurality of recording layers, before has been confirmed as key horizon.

In one embodiment of the invention, these a plurality of recording layers be can recorded information recording layer.This information recording medium also comprises a plurality of regulatory regions, is used for regulating the record energy of laser.Each all comprises in these a plurality of regulatory regions corresponding one in these a plurality of recording layers.

In one embodiment of the invention, second recording layer as one of a plurality of recording layers comprises buffer zone.In a plurality of regulatory regions that comprise in this buffer zone and this second recording layer one is adjacent.

In one embodiment of the invention, these a plurality of regulatory regions each all be in the different radial positions on this information recording medium, to provide.

In one embodiment of the invention, this information recording medium is the information recording medium of WORM.

In one embodiment of the invention, distribute the address to give this first recording layer.Parameter comprises second parameter about another recording layer in first parameter of this first recording layer of visit and relevant these a plurality of recording layers.In the first dish block of information region allocation of storage first parameter to the address less than the address arrived of region allocation of storage second parameter in the first dish block of information.

In one embodiment of the invention, distribute the address to give this first recording layer.Form comprises second form about another recording layer in first form of first recording layer and relevant these a plurality of recording layers.In the first dish block of information region allocation of storage first form to the address less than the address arrived of region allocation of storage second form in the first dish block of information.

In one embodiment of the invention, this information recording medium further comprises the data field that is used for writing down the user data that is provided in these a plurality of recording layers.These a plurality of recording layers are furnished with groove.Second recording layer as one of these a plurality of recording layers comprises the zone and zone that a part of data field be provided identical with the first dish block of information radial position.Coil the groove shapes type that is equipped with in the identical zone of block of information radial position and provide the groove shapes type that is equipped with in the zone of a part of data field identical with first.

In one embodiment of the invention, at least a portion of these a plurality of recording layers, is furnished with groove.Second recording layer as one of these a plurality of recording layers does not have groove in the zone identical with the first dish block of information radial position as the part of second recording layer.

In one embodiment of the invention, these a plurality of recording layers are furnished with groove.As the groove shapes type in second recording layer of one of these a plurality of recording layers is constant.

In one embodiment of the invention, first recording layer is furnished with groove.The shape type of the first dish block of information further groove is with a part of as first recording layer and different with this first groove shapes type of coiling in the adjacent areas of block of information.

In one embodiment of the invention, this first recording layer is furnished with groove.The groove of this first dish in block of information with link to each other as first recording layer part and with groove in this first dish block of information adjacent areas.

In one embodiment of the invention, this parameter comprises first parameter and first form relevant with first recording layer with form.This parameter and form comprise and relevant second parameter and second form of second recording layer as another recording layer of these a plurality of recording layers.The length in zone of storing second parameter and second form in the first dish block of information in the length in storage this first parameter and the zone of first form and the first dish block of information is identical.

In one embodiment of the invention, this parameter comprises first parameter of relevant visit first recording layer.This form comprises first form of relevant first recording layer.One cover first parameter and first form are to repeat continuously, and are stored in this first dish block of information.

In one embodiment of the invention, this parameter comprises second parameter of relevant second recording layer, another recording layer that this second recording layer is these a plurality of recording layers.This form comprises second form of relevant this second recording layer.One cover second parameter and second form are to repeat continuously, and are stored in this first dish block of information.

In one embodiment of the invention, this optical disc information district storing multiple sets parameter and form.

In one embodiment of the invention, this information recording medium further comprises the dummy argument district.Should comprise first cover and second cover by many covers.This dummy argument district is provided in the first area that first cover is provided and provides between the second area of second cover, and this first area is the part of the first dish block of information, and this second area is another part of the first dish block of information.

In one embodiment of the invention, the length in this dummy argument district is the integral multiple of the zone length of storage set of parameter and form.

In one embodiment of the invention, distribute the address to give first recording layer.This parameter comprises second parameter about another recording layer of first parameter of this first recording layer of visit and relevant these a plurality of recording layers.This first parameter and second parameter are stored in the first dish block of information and are assigned in the zone of same address.

In one embodiment of the invention, distribute the address to give first recording layer.This form comprises second form about another recording layer of first form of visit first recording layer and relevant these a plurality of recording layers.This first form and second form are stored in the first dish block of information and are assigned in the zone of identical address.

According to a further aspect in the invention, provide a kind of recording unit that is used for recording information in the information recording medium.This information recording medium comprises a plurality of recording layers, and the optical disc information district that is used for storing the form of the parameter of relevant these a plurality of recording layers of visit and relevant these a plurality of recording layers.This optical disc information district provides in first recording layer as one of these a plurality of recording layers.This recording unit comprises can write information light the shaven head of this information recording medium, and is used for controlling the control assembly that uses the shaven head record.This record comprises reproducing and is stored in stored parameters and form in the optical disc information district, and according to the parameter and the form of this reproduction, records information to the step in this information recording medium.

According to a further aspect in the invention, provide a kind of reproducer that is used for from information recording medium information reproduction.This information recording medium comprises a plurality of recording layers, and the optical disc information district that is used for storing the form of the parameter of relevant these a plurality of recording layers of visit and relevant these a plurality of recording layers.This optical disc information district provides in first recording layer as one of these a plurality of recording layers.This reproducer comprise can be from this information recording medium the shaven head of light sense information, and be used for controlling the control assembly that uses shaven head to reproduce.This reproduction comprises reproduces parameter and the form that is stored in the optical disc information district, and according to the parameter of this reproduction and the step of form information reproduction from this information recording medium.

According to a further aspect in the invention, provide a kind of recording method that is used for recording information in the information recording medium.This information recording medium comprises a plurality of recording layers, and the optical disc information district that is used for storing the form of the parameter of relevant these a plurality of recording layers of visit and relevant these a plurality of recording layers.This optical disc information district provides in first recording layer as one of these a plurality of recording layers.This recording method comprises reproduces parameter and the form be stored in the optical disc information district, and according to the parameter and the form of this reproduction, records information to the step in this information recording medium.

According to a further aspect in the invention, provide a kind of reproducting method that is used for from information recording medium information reproduction.This information recording medium comprises a plurality of recording layers, and the optical disc information district that is used for storing the form of the parameter of relevant these a plurality of recording layers of visit and relevant these a plurality of recording layers.This optical disc information district provides in first recording layer as one of these a plurality of recording layers.This reproducting method comprises and reproduces parameter and the form be stored in the optical disc information district, and according to the parameter of this reproduction and the step of form information reproduction from this information recording medium.

Therefore, the advantage of invention as described herein is to provide a kind of information recording medium that comprises at least two recording layers, a kind of method and apparatus that is used for recording information on this media, and a kind of method and apparatus that is used for from this media information reproduction, wherein reduced from the required time of optical disc information district information reproduction.

With reference to the accompanying drawings, after reading and describing in detail below the understanding, for a person skilled in the art, these and other advantage of the present invention will become apparent.

Description of drawings

Fig. 1 is the synoptic diagram according to the CD of the embodiment of the invention.

Fig. 2 A is the synoptic diagram of the track that is equipped with in the recording layer according to the embodiment of the invention.

Fig. 2 B is the synoptic diagram of the track that is equipped with in the recording layer according to the embodiment of the invention.

Fig. 2 C is the synoptic diagram of the track that is equipped with in the recording layer according to the embodiment of the invention.

Fig. 2 D is the synoptic diagram of the track that is equipped with in the recording layer according to the embodiment of the invention.

Fig. 3 is the synoptic diagram according to the recording/reproducing apparatus of the embodiment of the invention.

Fig. 4 A is the synoptic diagram according to the track of the embodiment of the invention.

Fig. 4 B is the synoptic diagram according to the track of the embodiment of the invention.

Fig. 4 C is the synoptic diagram according to the recoding/reproduction direction of the embodiment of the invention.

Fig. 4 D illustrates the synoptic diagram that distributes according to the recording layer address number of the embodiment of the invention.

Fig. 5 A is the synoptic diagram according to the track of the embodiment of the invention.

Fig. 5 B is the synoptic diagram according to the track of the embodiment of the invention.

Fig. 5 C is the synoptic diagram according to the recoding/reproduction direction of the embodiment of the invention.

Fig. 5 D illustrates the synoptic diagram that distributes according to the recording layer address number of the embodiment of the invention.

Fig. 6 A is the layout of information in the optical disc information district.

Fig. 6 B is the layout of information in the optical disc information district.

Fig. 7 is the CD synoptic diagram.

Fig. 8 A is the synoptic diagram according to the CD of the embodiment of the invention.

Fig. 8 B is the synoptic diagram according to the CD of the embodiment of the invention.

Fig. 9 is the synoptic diagram according to the CD of the embodiment of the invention.

Figure 10 is the synoptic diagram according to the CD of the embodiment of the invention.

The specific embodiment mode

Below, will be with reference to the accompanying drawings, present invention is described by example.

Fig. 1 shows a kind of rewritable optical disc 100 that comprises two recording layers according to the embodiment of the invention.

This CD 100 comprises 104, the first substrates 105 of first recording layer, binder resin 103, the second substrates 101 and second recording layer 102.Each all is equipped with pilot hole 106 in these substrates and the recording layer.CD 100 has the data field 115 of the user data of being used for.On first recording layer 104 and second recording layer 105, all provide data field 115.The data field 114 that provides on the data field 110 that provides on second recording layer 102 and first recording layer 104 is provided in data field 115.

Second recording layer 102 comprises optical disc information district 107, defect list district 108, spare area 109 and data field 110.First recording layer 104 comprises optical disc information district 111, defect list district 112, spare area 113 and data field 114.First recording layer 104 and second recording layer 102 are to provide on the one side of this CD 100.

Optical disc information district 107, defect list district 108, spare area 109, data field 110, optical disc information district 111, defect list district 112, each all is equipped with a plurality of spirals or concentric rail spare area 113 and data field 114.Each track comprises a plurality of sectors.

Here, defect list district 108, spare area 109, data field 110, defect list district 112, but spare area 113 and data field 114 are recording areas, at these regional middle orbits by pre-fixing turn bending.With reference to figure 2B, by covering high-frequency component in orbit, address information or the like can be recorded in the track.Alternatively, with reference to figure 2C, by replace the segment corresponding to pre-fixing turn integral multiple with the segment with different frequency, address information or the like can be recorded in the track.Alternatively, with reference to figure 2D, can regulate the segment of the segment replacement of pattern or combination of frequency with having part corresponding to pre-fixing turn integral multiple.By forming the trade shape type shown in Fig. 2 C and Fig. 2 D, can obtain the state continuity of predetermined cyclic part, thus the feasible Clock Extraction of carrying out easily.

First substrate 105 and second substrate 101 are to be made by polycarbonate resin, are used for protecting respectively first recording layer 104 and second recording layer 102.The district can be reproduced by optical disc information district 107, can reproduce at this and write down in district with visiting the parameter of first recording layer 104 and second recording layer 102 and the form of first recording layer 104 and second recording layer 102.The district is only reproduced in optical disc information district 111, has write down in this zone with visiting the parameter of first recording layer 104 and second recording layer 102 and the form of first recording layer 104 and second recording layer 102.Optical disc information district 111 has write down the information identical with optical disc information district 107.CD 100 can have optical disc information district 107 and optical disc information district 111, or has optical disc information district 107 or optical disc information district 111.Stored parameters is expression is fit to the laser radiation energy of second recording layer 102 when recoding/reproduction information on second recording layer 102 the second irradiation energy information in the optical disc information district 107, and expression is fit to the first irradiation energy information of the laser radiation energy of first recording layer 104 when recoding/reproduction information on first recording layer 104.Stored parameters is expression is fit to the laser radiation energy of second recording layer 102 when recoding/reproduction information on second recording layer 102 the second irradiation energy information in the optical disc information district 111, and expression is fit to the first irradiation energy information of the laser radiation energy of first recording layer 104 when recoding/reproduction information on first recording layer 104.By every circle or per two circle radiai adjustment tracks, information is recorded on the media.A kind of example of rail adjustment has been shown among Fig. 2 A.

In this embodiment, only reproduce district (as optical disc information district 107, optical disc information district 111, or the like) but and recording areas (as defect list district 108, spare area 109, data field 110, defect list district 112, spare area 113, data field 114, or the like) between use different trade shape types.Therefore, before the address that optical disc recording/reproducing equipment can write down, judge whether current zone of reproducing is the optical disc information district in reproducing track.

For multiplayer optical disk, be used for reproducing from the laser radiation energy of the information of layer may be greater than the laser radiation energy that is used for single-layer optical disc farthest from the optical disc surface that reads information.Therefore, the laser radiation energy of single-layer optical disc may be not enough to from CD 100 current address again,, may be enough to the track signal waveform recognition optical disc information district that obtains according to the shape from orbital groove.

Fig. 3 shows the recording/reproducing apparatus 300 according to the embodiment of the invention.This recording/reproducing apparatus 300 comprises Spindle Motor 302, shaven head 303, and laser control circuit 304, servo circuit 305 reproduces binarization circuit 306, digital signal processing circuit 307, record compensating circuit 308, and CPU309.

With CD 100 (Fig. 1) recording/reproducing apparatus 300 of packing into.This recording/reproducing apparatus 300 will be from host PC 310 reception information, and information is sent to host PC 310.

As the CPU309 of control assembly according to built-in control program, all operations in controlling recording/reproducer 300.As described below, shaven head 303 writes CD with information light on the one side of CD 100.In addition, shaven head 303 can read information by light from CD 100.CPU309 uses bare headed 303 controlling recording and reproduces operation.Recording operation comprises and reproduces parameter and the form be stored in the optical disc information district, and according to the parameter and the form of this reproduction, records user data up to the step on the CD 100.Reproduce operation and comprise and reproduce parameter and the form that is stored in the optical disc information district, and, reproduce the step of the information in the CD 100 that is recorded in according to the parameter and the form of this reproduction.Below the operation of recording/reproducing apparatus 300 will be described downwards.

CD 100 has as top with reference to figure 1 described structure.Spindle Motor 302 is to be used for the motor of rotary CD 100.Shaven head 303 usefulness laser radiation CDs 100, and will convert electric signal to from CD 100 laser light reflected 311, so that the output reproducing signal.Laser control circuit 304 controls are from the laser energy of shaven head 303 outputs.These controls are to carry out according to the instruction from CPU309.The position of servo circuit 305 control shaven heads 303 focuses on, and follows track, and the rotation of main shaft 302.Reproduce 306 pairs of reproducing signals that obtain by shaven head 303 of binary circuit (data-signal is an additive signal, and the information of relevant optical disc information district or address is subtraction signal) and amplify and binarization, thus the generation binary number.Built-in PLL (not shown) is used for producing the clock synchronous with binary signal.

Modulated process or error correction procedure that 307 pairs of binary signals of digital signal processing circuit are scheduled to.When record data, the data of this record are carried out error correcting code increase process and predetermined modulated process, thereby produce modulating data.Record compensating circuit 308 converts modulating data to the optical modulation data that comprise pulse train, simultaneously also according to the reproducing signal in optical disc information district or before be stored in data among the CPU309, pulsewidth of fine setting optical modulation data or the like, thus the recording pulse signal that is suitable for forming pit produced.CPU309 controls all operations in this recording/reproducing apparatus 300.Host PC 310 comprises the computing machine (not shown), the application program (not shown), and operating system (not shown) or the like, and ask this recording/reproducing apparatus 300 to carry out information record or reproduction.

When CD 100 is packed this recording/reproducing apparatus 300 into,, use to have the shaven head 303 of predetermined irradiation energy from optical disc information district 111 information reproductions according to signal from laser control circuit 304 and servo circuit 305.In this case, this information reproduction is to be used for information (user data) is recorded irradiation energy information in first recording layer, or the like.When host PC is sent when request, CPU309 will be used for recorded information and be set to laser control circuit 304 to the record energy in first recording layer 104, and control bare headed 303 recorded informations in data field 114.Next, CPU309 will be used for recorded information and be set to laser control circuit 304 to the record energy in second recording layer 102, and control bare headed 303 recorded informations in data field 110.

The optical disc information district 111 of CD 100 comprises the parameter of first recording layer 104 and second recording layer 102 and form (irradiation energy of record, or the like), therefore as long as reproduce primary information from the optical disc information district.Therefore, with information reproduction from optical disc information district 111 so that with data recording in first recording layer 104, simultaneously from optical disc information district 107 information reproductions so that data recording is compared to the situation second recording layer 102, reduced the visit the required time of optical disc information district.

In this embodiment, parameter and form are to be recorded in simultaneously in optical disc information district 107 and the optical disc information district 111, thereby make and can obtain irradiation energy information or the like from arbitrary layer.Therefore, even when because the interference in the focus control of the irregular thickness of binder resin 103 or servo circuit 305, therefore from another layer that is different from predetermined layer, during information reproduction, also can obtain the required information of record from this layer.

In this embodiment, irradiation energy information or the like is recorded in optical disc information district 107 and the optical disc information district 111 simultaneously.Therefore, can less record data before the required time, for example, when at first record data are in data field 114, information reproduction from optical disc information district 111, perhaps when at first record data are in data field 110, information reproduction from optical disc information district 107.

In this embodiment, CD 100 has two-layer, that is, and and first recording layer 104 and second recording layer 102.Alternatively, CD 100 can have three or a plurality of recording layer that writes down.In this embodiment, the recording of information form that is recorded in optical disc information district 107 and the optical disc information district 111 is such, makes every circle or per two enclose the beam mode of radiai adjustment tracks.Alternatively, as shown in Fig. 2 B, by high-frequency component is covered in orbit, information can be recorded in the track according to pre-fixing turn bending.Alternatively, shown in Fig. 2 C and 2D,, replace this track segment with segment with different frequency or pattern by using the orbital groove shape of same type, information can be recorded in the track according to pre-fixing turn bending, can produce substrate more easily.

In this embodiment, optical disc information district 107 and optical disc information district 111 each all have a plurality of spirals or concentric rail.Information can be recorded in optical disc information district 107 and the optical disc information district 111 with the form of pit and projection.By use with dispatch from the factory before record data to the same method of the method in the data field, information can be recorded in the optical disc information district.

Optical disc information district 107 and optical disc information district 111 can have the defect list of being different from district 108, spare area 109, data field 110, defect list district 112, the track gradient of spare area 113 and data field 114 track gradients (perhaps radially pit gradient) (perhaps radially pit gradient).By enlarging the track gradient in the optical disc information district, influence that can less adjacent tracks.

By enlarging track gradient or the pit gradient in the optical disc information district, but make it track gradient or pit gradient greater than recording areas such as data field or the like, even when using when for example having the compact disk equipment of long optical maser wavelength shaven head, also can be from the optical disc information district information reproduction.In this case, minimal information can return to the user.In other words, by enlarging the compatibility in the optical disc information district between the different types of optical disks equipment,, also can know the reason that can not write down even when can not information reproduction owing to the specification of this equipment.

When from one deck to another layer vertical moving laser spots because the substrate that links together is heavy and, the pilot hole of substrate heavy and or the like, be difficult to laser spots is positioned in the identical radial position.For example, when attempting when distance first recording layer 104 inner rings the 1000th track moves on to distance second recording layer 102 inner rings the 1000th track, the error of ± 50 tracks takes place.Therefore, but when at the boundary vicinity that only reproduces between track and the track record, when laser spots moves on to another layer from one deck, if the track on the zone of interest is discontinuous, then reproduce or recording operation becomes unstable, and can not carry out fast.

Therefore, even when the track gradient in optical disc information district 107 and optical disc information district 111 is different from defect list district 108, spare area 109, data field 110, defect list district 112, the track gradient of spare area 113 and data field 114 wishes that also the orbital groove in optical disc information district 107 and optical disc information district 107 adjacent domains (are the defect list district 108 in Fig. 1 example as this zone; This zone can be spare area 108 or data field 110) orbital groove connect continuously.Similarly, wish that the orbital groove in optical disc information district 111 and optical disc information district 111 adjacent domains are (as the defect list district 112 in Fig. 1 example; This zone can be spare area 113 or data field 114) orbital groove connect continuously., wish that gradient as far as possible moderately changes.Consider servo, the track gradient in optical disc information district and defect list district, the difference between the track gradient of spare area or data field wishes it is about 10%, maximum is approximately 15%, reproduces fast when moving to arbitrary layer track with convenient laser spots.

In this embodiment, shown in Fig. 2 A, by each reference circle or per two circle radiai adjustment tracks, optical disc information is recorded in the optical disc information district.As Fig. 2 B, shown in Fig. 2 C and Fig. 2 D,, perhaps on this track, cover high-frequency component by the track of component frequency modulation according to pre-fixing turn bending, address information or the like is recorded to the defect list district, in spare area and the data field.In whole or part track gradient zone of transition, can be with the optical disc information district, the defect list district, a kind of regulative mode that any one degree does not use in spare area and the data field forms track, perhaps may not be conditioned, may not crooked perhaps.

Like this, by change zone of transition and the control method between the adjacent area or the shape type of track gradient before and after zone of transition, recording/reproducing apparatus 300 can the quick identification zone of transition.

As mentioned above, remove point of discontinuity from the border between the zone with different track gradients.Therefore, when reference position moves to radial position away from the purpose of discontinuous part (reference position) zone, compare, in the purpose zone of CD, can begin fast to handle with discontinuous part with laser spots.

In this embodiment, the optical disc information district is that inner ring at CD provides.Alternatively, the optical disc information district can be that the outmost turns at CD provides, and perhaps provides simultaneously in the inner ring and the outer ring of CD.

In this embodiment, optical disc information district 107 and optical disc information district 111 each all comprise irradiation energy information of first recording layer and second recording layer or the like.If specified the one deck that reproduces, then may all in its optical disc information district, comprise irradiation energy information of all floor or the like by not all floor.

The distance that reads the optical disc surface of information to CD 100 is used as key horizon with recording layer to the essentially identical CD 100 of optical disc surface distance of the information that reads of the CD that comprises single recording layer.At least this key horizon can comprise the optical disc information district.Therefore, be used for recording/reproducing apparatus in enterprising line item of the CD that comprises single recording layer and reproduction, can obtain the optical disc information of 100 arbitrary layers of this CDs, thereby make the structure that to simplify this recording/reproducing apparatus.Recording layer (as first recording layer 104) as key horizon is previous definite from a plurality of recording layers.

Note, along with the increase of the distance of optical disc surface because the degradation of the reproducing signal that tilts to cause also increases.Therefore, wish that key horizon is identical to the distance of optical disc surface with the recording layer of single-layer optical disc to the distance of optical disc surface, and this key horizon is from optical disc surface distance one deck farthest.In this case, when the shape type of the shape type that is positioned at the zone in the same radial position as the part of the recording layer beyond this key horizon and with the optical disc information district of this key horizon and the data field of user data was identical, penetrability can have nothing to do with radial position equally.Therefore, do not need to be used for the particular detection device of from the optical disc information district of key horizon information reproduction, therefore can simplify the structure of recording/reproducing apparatus, and be easier to make recording layer.

Especially, in comprising the multiplayer optical disk of a plurality of recording layers, the shape type of the groove in the recording layer outside the key horizon is identical with groove shapes type in data field (only using a kind of groove shapes type), thereby has simplified the manufacturing of substrate.

When key horizon comprises the optical disc information district, do not provide groove (being flat structures) being positioned on the zone in the same radial position, can reduce the dispersion of light in the recording layer outside the key horizon as the part of the recording layer outside the key horizon and with the optical disc information district of key horizon.Therefore, can improve quality from the reproducing signal of key horizon.

The optical disc information district only is provided in key horizon, then, is easy to judge whether the recording layer of current reproduction is key horizon by the radial position near zone that is equipped with CD optical disc information district is reproduced.

The optical disc information district can store the parameter of relevant a plurality of recording layers, as the irradiation energy information that is used for reproducing of recommending, the irradiation energy information that is used for writing down of recommending, the maximum illumination energy information, pulsewidth in the record, ratio in the record between a plurality of irradiation energies of structure, the marginal constant that in judging record, uses during best irradiation energy, or the like.

The optical disc information district can comprise the form of relevant a plurality of recording layers, as optical disc name, disc size, version information, arbitrary layer optical disc types (that is, but expression one deck is record/can reproduce layer or the identifier of only reproducing layer), but the quantity of all recording layers, all only reproduce the quantity of layer, and the quantity of all layers.The optical disc information district also comprises the form of relevant a plurality of recording layers, as represents the identifier whether information in arbitrary layer can be copied, clock information, whether expression provides the identifier of the BCA (Burst CuttingArea) that is used for providing customizing messages after optical disc replay, transmission speed, recoding/reproduction direction, physical address starting symbol, physical address stops number, logical address starting symbol, logical address stop number, the shortest mark lengths, writing speed, or the like.

By being arranged in each recording layer record and reproducing required parameter, the degree of freedom in the time of can improving the design CD.For example, when using a plurality of recording layers to obtain high density recording, must consider the variation of reflection in those layers of laser penetration at least.Therefore, and only compare, need more high-precision design at an enterprising line item of recording layer.In this case, for example,, can infer that then CD 100 has any problem when the design record layer if first recording layer 104 and second recording layer 102 must reproduce with same irradiation energy.For example, must under the situation of high-penetrability, guarantee the record performance of second recording layer 102.For fear of this point, the irradiation energy that is used for reproducing is not limited, and change into irradiation energy information is recorded in the optical disc information district.Therefore, when reproducing in first recording layer 104, irradiation energy can increase.Degree of freedom in the time of can being increased in the recording film that designs second recording layer 102.

By enterprising line item of one deck in office and the required parameter of reproduction are recorded in the optical disc information district of at least one recording layer together, can grasp the control method of whole CD the best fast.

BCA is used for further the CD that has same content in the optical disc information district being classified.After optical disc replay, classification is recorded with the form of bar code.BCA is also providing in key horizon in one deck at least ideally.In this case, provide the groove shapes that is different from key horizon, then, just be easy to discern key horizon by in the key horizon radial extension of BCA is provided, reproducing to the layer that does not contain BCA.Especially, in the recording layer outside key horizon,, thereby make the dispersion that can reduce light in other layer for the radial extension that BCA is provided provides the flat structures that does not have groove.In addition, can improve quality, and make things convenient for the manufacturing of substrate from the information reproduction of BCA.

Need among the BCA to shine but record information to having than laser at the much higher energy of the required energy of the enterprising line item of recording areas.Therefore, but may damage recording areas such as defect list district, spare area, the characteristic of the recording film of data field or the like.Therefore, but wish that recording areas does not comprise the variation of BCA and record position.But if recording areas with the regional adjacent of BCA is provided, then be desirable to provide buffer zone, in this buffer zone, do not limit the purposes of appointment between these zones, in this case, but reduced the net capacity of recording areas.

According to above-mentioned viewpoint, typically wish to be equipped with the zone that BCA is provided at the end of radial direction.At last not at the BCA that provides of outmost turns, because when action and from the viewpoint of capacity, all need the information among the BCA.Shown in Fig. 8 A, wishing is more providing BCA in the inner ring than optical disc information district.As mentioned above, when recorded information is in BCA, shine CD, may damage and only reproduce the data that write down in the district with high energy laser.Therefore, as shown in Fig. 8 B, the inner ring (optical disc information district 801A) in the optical disc information district can be equipped with bumper portion, provides the dummy argument data in this bumper portion, and as " 0 ", in fact, data are to be recorded in its outer ring (optical disc information district 801B).

In this embodiment, for each reference circle and per two circles,, optical disc information is recorded in the optical disc information district by the radiai adjustment track.Alternatively, in the zone of BCA is provided, can use the control method that is different from the optical disc information district.On the contrary, track can be the straight groove not do not regulated or can be by pre-fixing turn bending.In addition, provide between the zone and optical disc information district of BCA, the track gradient can be different.In this case, can damage orbital groove owing to record information among the BCA, the zone that therefore comprises BCA preferably has bigger track gradient.

As mentioned above, by changing the shape type of rail adjustment method and track, recording/reproducing apparatus can be distinguished zone and the optical disc information district that BCA is provided apace.

Generally speaking, when laser spots during from one deck to another layer vertical moving because the substrate that links together heavy and, substrate pilot hole heavy and, or the like, therefore be difficult to laser spots is positioned in the identical radial position.For example, when attempting when distance first recording layer 104 inner rings the 1000th track moves on to second recording layer, 102 inner rings the 1000th track, the error of ± 50 tracks takes place.Therefore, but when at the boundary vicinity that only reproduces between track and the track record, when laser spots moves on to another layer from one deck, if the track on the zone of interest is discontinuous, then reproduce or recording operation becomes unstable, and can not carry out fast.Therefore, even when the zone that BCA is provided has different track gradients with the optical disc information district, wish that also these zones link together continuously.In addition, wish that this track gradient moderately changes.

Ideally, be used for the irradiation energy of irradiation energy information that reproduce prior to being used for writing down.In this case, the request of sending when host PC is when reproducing, if that the irradiation energy information that is used for writing down does not have is reproduced, also can reproduce data fast.

The enterprising line item of arbitrary floor and required parameter and the form of reproduction that are recorded in the optical disc information district can be recorded in defect list district 108, spare area 109, and data field 110, defect list district 112 is in the track of spare area 113 and data field 114.Because this information is recorded in arbitrary track, for example, when receiving the reproduction request from host PC 310, just from the optical disc information district, reproduce required minimum information, as irradiation energy or the like, this optical disc information district does not have because of reproducing the danger that irradiation energy is deleted user data.Next, selecting waiting time from the track of data field, to reproduce remaining information, as the irradiation energy information that is used for writing down of when then receiving record request, wishing to use, or the like, thereby make and can reproduce data fast.

Can use with the method identical method of address information recording in each zone, perhaps use the method for the method that is different from recording address information to come recording parameters and form.

The parameter and the form that are recorded in the optical disc information district can not be to be recorded in defect list district 108, spare area 109, and data field 110, defect list district 112, spare area 113 is in the All Ranges of data field 114 or the like.For example, when parameter was not recorded in the data field 114, owing to wherein do not have parameter or form, even data field 114 has the trade shape identical with other zone, recording/reproducing apparatus also can be identified as the data field with data field 114.

The parameter of all floor and form may not be recorded in defect list district 108, spare area 109, and data field 110, defect list district 112, spare area 113 is in the track of data field 114.Each layer can only comprise parameter and the form of himself.Except himself parameter and form, each layer can further comprise the minimum information that needs of other layer.Owing to do not write down the information of other layer, therefore, for example can write down the address information copy of greater number.Other layer information integration by will needing combination is to the inside part, the available optical disc substrate of easily making.

Next, will be described address number to 5D to 4D and Fig. 5 A with reference to figure 4A.Fig. 4 A shows track to 4D, recoding/reproduction direction, and address number.Fig. 4 A shows the spiral groove pattern in first recording layer 104.Fig. 4 B shows the spiral groove pattern in second recording layer 102.The recoding/reproduction directional diagram 4D that Fig. 4 C shows CD 100 shows the distribution of address number.When these CD 100 rotations, shaven head moves to the outer ring along track 401 or 402 from inner ring.When the journal data, for example, 114 inner ring is to outmost turns from the data field, and 110 inner ring carries out record to outmost turns from the data field then.Physical address in each recording layer numbers 403 and logical address numbers 404 is cumulative along the recoding/reproduction direction.Physical address numbers 402 may not be since 0, and may be discontinuous on first and second layers border.

For example, level number can be included in the physical address numbers 403, and can be positioned at the top part of physical address numbers 403.To distribute to data fields all on the CD since 0 continuously cumulative logical address numbers 404.In the data field 114 of ground floor, the logical address of outmost turns numbers 404 is 0, and cumulative one by one towards the outer ring direction.In the data field 110 of the second layer, logical address numbers 404 adds 1 from the ground floor maximum number, and is cumulative one by one towards the outer ring from inner ring.Reference number 405 and 406 expression leading-out zone (not shown in figure 1)s, this leading-out zone is in order to make shaven head 303 to be equipped with along track when shaven head 303 exceeds the data field.

, make substrate and be more prone to as shown in the 4D as Fig. 4 A than substrate with different hands of spiral with same-handed direction.

Fig. 5 A shows track to 5D, an example of recoding/reproduction direction and address number.Fig. 5 A shows the spiral groove pattern in first recording layer 104.Fig. 5 B shows the spiral groove pattern in second recording layer 102.Fig. 5 C shows the recoding/reproduction direction of CD 100.Fig. 5 D shows the distribution of address number.When CD 100 rotation, shaven head 303 along inner orbit 502 from ground floor the inner ring on 104 to the outer ring, and along track 501 from the second layer move to inner ring 102 outer ring.When the journal data, for example, 114 inner ring is to outmost turns from the data field, and 110 outmost turns is carried out record to inner ring from the data field.Physical address numbers 503 and logical address numbers 504 is cumulative along the recoding/reproduction direction in each recording layer.Notice that second layer spiral has the direction opposite with the ground floor spiral.Therefore, the relation between address number and the radius is opposite.In the data field 114 of ground floor, be 0 in inner ring logical address numbers 504, and cumulative one by one towards the outer ring direction.In the data field 110 of the second layer, logical address number 504 maximum number from ground floor add 1, and are cumulative one by one to inner ring direction from outmost turns.Reference number 505 and 506 expression leading-out zone (not shown in figure 1)s, this leading-out zone is in order to make shaven head 303 to be equipped with along track when shaven head 303 exceeds the data field.

As Fig. 5 A under the situation shown in the 5D, 114 inner ring is to outmost turns from the data field, then 110 outmost turns is carried out record to inner ring from the data field, especially, if all recording layer special parameters and format information are recorded in the single optical disc information district together, do not need shaven head 303 to get back to the optical disc information district of inner ring from outmost turns.

Similarly, same under situation about only reproducing, when from the data field 114 inner ring to outmost turns, then from the data field 110 outmost turns when inner ring reproduces, especially, if all recording layer special parameters and format information are recorded in the single optical disc information district together, do not need shaven head 303 to get back to the optical disc information district of inner ring from outmost turns.

Fig. 6 A shows the layout of recording layer special parameter and form in optical disc information district 107 and 111.In Fig. 6 A, #1 represent about in the parameter of first recording layer 104 and the form at least one, #2 represent about in the parameter of second recording layer 102 and the form at least one.Fig. 6 A shows the layout of in two-layer CD optical disc information district 601 to 603 and 609.Optical disc information district 601 to 603 and 609 is corresponding to optical disc information district 107 and 111.The arrangement information in optical disc information district 604 is arrangement informations of single-layer optical disc.Notice that optical disc information district 601 to 603 and 609 placement rule can be applied in the multiplayer optical disk in two-layer CD.

In optical disc information district 601 to 603 and 609, many covers recording layer special parameter and format information have been write down.Therefore, by writing down many covers, even, also can from another zone, reproduce and obtain expectation information because scratch and dust make can not reproduce on the zone.

The same ideally layer that relates to parameter and form of the zone length of recording parameters and form has nothing to do.In this case, reference position that can appointed information, thus make it possible to reduce the stand-by period, perhaps make it not need to search the reference position of each recording layer of every suit.Therefore, can simplify the structure of recording/reproducing apparatus.For example, in the optical disc information district, the parameter of relevant first recording layer 104 of record is identical with the zone length of parameter that writes down relevant second recording layer 102 and form with the zone length of form.

In optical disc information district 601, the parameter and the format information of all recording layers of cover are repeated 4 times.For example, data " 0 " are recorded in the remaining area 605 in optical disc information district 601.In this case, when from inner ring when write down the outer ring and reproduce, need the parameter and the form of the recording layer (as first recording layer 104) that at first reproduces by writing down inner ring as key horizon, can obtain the parameter and the form of the recording layer that need at first reproduce fast, and can when irradiation energy is improper for this recording layer that need at first reproduce, revise irradiation energy fast.The regional assigned address of the parameter of relevant first recording layer 104 of storage and form is less than storing the parameter of relevant second recording layer 102 and the regional assigned address of form in the optical disc information district in the optical disc information district.In this case, in the optical disc information district regional assigned address of the irradiation energy information of relevant first recording layer 104 of storage less than storage in the optical disc information district about the regional assigned address of the irradiation energy information of second recording layer 102.Have this feature, for example, can make because the corrupted data that too high irradiation energy causes minimizes.

Similarly, when from the outer ring when inner ring reproduces, need the information of the recording layer that at first reproduces by the record outmost turns, in the time of can irradiation energy is improper the recording layer that at first reproduces for needs, revise irradiation energy fast.In addition, compare 602 of the following stated, apace information reproduction from all recording layers.

When about the quantity of information of the parameter of first recording layer 104 and second recording layer 102 and form when very little, about the parameter of first recording layer 104 and the parameter and the form of form and relevant second recording layer 102 can be stored in the zone that is assigned to same address in the optical disc information district 107.Supposition now is in first recording layer 104, and 100 inner ring is to location distributively, outer ring along circumferencial direction from CD.In this case, compare in the zone that is assigned to same address in the optical disc information district 107 record about the parameter of second recording layer 102 and the zone of form, being assigned to the zone of writing down in the zone of same address about the parameter of first recording layer 104 and form in the optical disc information district 107 and being on the position of inner ring more provides.Alternatively, supposition now in first recording layer 104, along the direction of circumference from the outer ring to inner ring location distributively.In this case, compare in the zone that is assigned to same address in the optical disc information district 107 record about the parameter of second recording layer 102 and the zone of form, being assigned to the zone of writing down in the zone of same address about the parameter of first recording layer 104 and form in the optical disc information district 107 and being on the position of outer ring more provides.

Note, in the included optical disc information district 107 of second recording layer 102, the parameter of relevant second recording layer 102 of storage and the regional assigned address of form may be less than the parameter of storing relevant first recording layer 104 and the regional assigned addresses of form.Therefore, even, when on second recording layer 102, more early reproducing, also can obtain parameter and form fast about second recording layer 102 when comparing first recording layer 104.Therefore, even when the irradiation energy of laser of irradiation second recording layer 102 is improper, also can revise irradiation energy fast.

Expression do not comprise clean data volume in 605 the optical disc information district 601, zone (as, be unit representation with the byte) information can be recorded near the inner ring in optical disc information district 601.Therefore, recording/reproducing apparatus does not reproduce unnecessary data, and can carry out subsequent process fast.Clean data volume can change according to recording layer.Alternatively, clean data volume can be recorded near the inner ring in optical disc information district of each recording layer.

In optical disc information district 601, the information of all recording layers of cover is repeated 4 times.The invention is not restricted to this.The information of expression multiplicity can be recorded near the inner ring in optical disc information district 601.Therefore, recording/reproducing apparatus is not descending unnecessary data, and can carry out subsequent process fast.

In optical disc information district 602, the parameter and the format information of each recording layer of cover are repeated 4 times.For example, data " 0 " are recorded in the remaining area 606 in optical disc information district 601.In this case, by writing down inner ring and need the information of the recording layer that at first reproduces, in the time of can irradiation energy is improper the recording layer that needs at first to reproduce for this, revise irradiation energy fast.In this case, in the optical disc information district the regional assigned address of the parameter of relevant first recording layer 104 of storage and form less than storing the parameter of relevant second recording layer 102 and the regional assigned address of form in the optical disc information district.Because arrangement information is identical with the arrangement information of optical disc information district 602 inner rings in the optical disc information district 604 of single-layer optical disc, therefore can make CD 100, the form of the reproduction algorithm of this CD 100 is identical with reproduction algorithm on being added to single-layer optical disc.Therefore, can simplify recording/reproducing apparatus.

Expression do not comprise clean data volume in 606 the optical disc information district 602, zone (as, be unit representation with the byte) information can be recorded near the inner ring in optical disc information district 602.Therefore, recording/reproducing apparatus does not reproduce unnecessary data, and can carry out subsequent process fast.Clean data volume can change according to recording layer.Alternatively, clean data volume can be recorded near the inner ring in optical disc information district of each recording layer.

In optical disc information district 602, the information of each recording layer of cover is repeated 4 times.The invention is not restricted to this.The information of expression multiplicity can be recorded near the inner ring in optical disc information district 602.Therefore, recording/reproducing apparatus does not reproduce unnecessary data, and can carry out subsequent process fast.Multiplicity can change according to recording layer.The multiplicity of information of one each recording layer of cover can be recorded near the inner ring in optical disc information district 602.

In optical disc information district 603, record and the parameter and the format information that reproduce are divided into each unit.Each discrete cell is all gathered about all recording layers.This collection result is recorded into a cover information.As for repetition methods, as in the optical disc information district 601, a cover information repeats repeatedly, has arranged a whole set of unit in this cover information, and perhaps alternatively, as in the optical disc information district 602, a unit is recorded repeatedly, and then, another unit is recorded repeatedly.

Data " 0 " are recorded in the remaining area and 607 in the optical disc information district 603.By writing down inner ring and need the information of the recording layer that at first reproduces, in the time of can irradiation energy is improper the recording layer that needs at first to reproduce for this, revise irradiation energy fast.

Expression do not comprise clean data volume in 607 the optical disc information district 603, zone (as, be unit representation with the byte) information can be recorded near the inner ring in optical disc information district 603.Therefore, recording/reproducing apparatus does not reproduce unnecessary data, and can carry out subsequent process fast.

The remainder in the optical disc information district 601 to 604 by tentation data being recorded recording parameters and format information, when servo circuit 305 control shaven heads 303 move to the optical disc information district, by reproducing tentation data, can quick identification optical disc information district.

In optical disc information district 601 to 603, shown in Fig. 4 D and Fig. 5 D, write down the information of each recording layer along the cumulative direction of address number.For example, shown in Fig. 5 D, when the hand of spiral was opposite, the physical arrangement between first recording layer and second recording layer was opposite.For example, the inner round portion from the optical disc information district on first recording layer begins to carry out record, and the outmost turns from the optical disc information district is partly carried out record on second recording layer.The invention is not restricted to this.Alternatively, on first and second recording layers, all the inner ring from CD carries out record.

In the optical disc information district 601 to 603, before the customizing messages of each layer of record, can write down recording layer common parameter format information or optical disc information.According to this method, with parameter and format record in optical disc information district 609.By using single cover joint project, when the number of plies increased, the optical disc information district can reduce relatively.By repeatedly writing down joint project, be similar to information #1 and #2 among Fig. 6 A, even then can not reproduce predetermined information from a zone, also can reproduce and acquired information from another zone because scratch or dust make.

Ideally, the zone length that is used for writing down the recording layer joint project is the multiple of zone length that is used for writing down the information of each recording layer.Therefore, even the number change of the number of plies or joint project, recording/reproducing apparatus also is easy to the reference position of information of forecasting, thereby can reduce the stand-by period, and simplifies the structure of recording/reproducing apparatus.

Next, Fig. 6 B shows the modification embodiment in optical disc information district 601, and promptly the optical disc information district 1101,1102,1103 and 1104.Optical disc information district 1101,1102,1103 and 1104 comprises a plurality of dummy arguments district 1100.

In optical disc information district 1101, the parameter and the format information of all recording layers of cover are repeated record, and have been equipped with the dummy argument district between each zone of record one cover information.Therefore, be to be recorded in by detecting the dummy argument district, can identifying information #1 near in the zone after the dummy argument district, perhaps information #2 is recorded near before the dummy argument district.Therefore, no longer need to provide the identifier of expression information #1 or #2, thus, can simplify the structure of recording/reproducing apparatus, and can reduce the processing time.

In the dummy argument district, can write down with optical disc information district remaining area 1105 in the identical content of content (as, data " 0 ") of record, perhaps alternatively, can write down different contents.By writing down different contents, can clearly identify information #1 is to be recorded near in the zone after the dummy argument district, and perhaps information #2 is recorded near before the dummy argument district.Even write down identical content,, also can clearly distinguish dummy argument and zone 1105, thereby cause same effect by changing record length.

As shown in optical disc information district 609 (Fig. 6 A), the information identical with #2 with information #1 is recorded in the dummy argument district, can identify information #1 is to be recorded near in the zone after the dummy argument district, perhaps information #2 is recorded near before the dummy argument district.

As shown in optical disc information district 1102, dummy argument district 1100 can be adjacent with zone 1106, therefore, can identify information #2 and be recorded at least near in the zone before the dummy argument data 1100.Note having only that last dummy argument district just comprises the content that is different from other dummy argument district in the optical disc information district 1102.In this case, can show the end that record repeats.

The length in dummy argument district can be the integral multiple of the zone length of record one cover information #1 and information #2, as shown in optical disc information district 1103.Therefore, even number of plies difference also is easy to predict the reference position of information in each recording layer, thus can low latency, and simplify the structure of reproducing identification.

As shown in optical disc information district 1104, dummy argument district 1100 can be recorded in before the zone of at first recorded information #1 and information #2.Therefore, can identify information #1 is recorded at least near in the zone after the dummy argument district.Note, have only the first dummy argument district in the optical disc information district 1104 just can have the content that is different from other dummy argument district.Therefore, can show the beginning that record repeats.

If can distinguish the optical disc information district and near the zone before the optical disc information district, then the setting in the first dummy argument district is not limited to said method.For example, according to trade shape or on trade shape the difference of the method for coverage information, can identify near the zone before the optical disc information district.

Notice that the dummy argument data shown in Fig. 6 b can be used in the optical disc information district 602, thereby caused essentially identical effect when being applied in the optical disc information district 601.

As mentioned above, be recorded in the single optical disc information district by will and reproducing required recording layer special parameter and format information at the enterprising line item of each recording layer, compare with information reproduction in a plurality of optical disc informations district that from multilayer, is equipped with, can reduce from a plurality of recording layer records and reproduction required time of data.

In this embodiment, the optical disc information district has mainly been described.In addition,, be recorded in the individual layer, can obtain identical effect by information with each recording layer as for defect list district and spare area.

In this embodiment, be recorded in the single optical disc information district at enterprising line item of each recording layer and required recording layer special parameter and the format information of reproduction.Alternatively, all these information can not be recorded in the single optical disc information district, can separately be recorded in a plurality of optical disc informations district.Alternatively, the predetermined essential information item of each recording layer can be recorded in the single optical disc information district, and other can be recorded in each time the optical disc information district.

Note, can be according to the layout shown in Fig. 6 A and the 6B, with the parameter that writes down in the optical disc information district and format record in defect list district 108, spare area 109, data field 110, defect list district 112, spare area 113 is in the track of data field 114.

Next, will rewritable optical disc 900 according to another embodiment of the present invention be described with reference to figure 9.

The CD 900 of Fig. 9 comprises first substrate, 905, the first recording layers 904, binder resin 903, the second recording layers 902 and second substrate 901.Each substrate and each recording layer all are furnished with pilot hole 906.CD 900 comprises and is used for the data field 920 of user data.In first recording layer 904 and second recording layer 902, all be equipped with data field 920.Data field 912 as the part of data field 920 is equipped with in second recording layer 902, and is equipped with in first recording layer 904 as the data field 918 of another part of data field 920.

Second recording layer 902 comprises 907, the first defect list districts 908, optical disc information district, test recording area 909, the second defect list districts 910, spare area 911 and data field 912.

First recording layer 904 comprises 913, the first defect list districts 914, optical disc information district, test recording area 915, the second defect list districts 916, spare area 917 and data field 918.

First recording layer 904 and second recording layer 902 all are to provide on the single face of CD 900.

Hope is the identical data of record in the first defect list district of each recording layer and the second defect list district.This identical data can be recorded in the defect list district of all recording layers.Therefore, when record or reproduction, when laser spots is mobile between recording layer, can save the required time of defect list district reproduction in the destination layer.

Test recording area 909 is used for carrying out test record as regulatory region, so that regulate the laser log energy of recorded information in the data field 912.Similarly, test recording area 915 is used for carrying out test record as regulatory region, so that regulate the laser log energy of recorded information in the data field 918.As among this embodiment,, can determine to be fit to the record condition of each recording layer by in each recording layer, being equipped with test recording area.

When laser spots during from one deck to another layer vertical moving because the substrate that links together is heavy and, the pilot hole of substrate heavy and or the like, be difficult to laser spots is positioned in the identical radial position.For example, when attempting when distance first recording layer 904 inner rings the 1000th track moves on to distance second recording layer 902 inner rings the 1000th track, the error of ± 50 tracks takes place.

In test recording area,, determine the record adjusting by under the unstable servo record condition, carrying out test record.In this case, in recording process, the danger of track displacement is arranged, perhaps the danger of the unplanned layer of laser moment focusing.For fear of this danger, ideally, before the test recording area of each recording layer and afterwards, disposed adjacent does not limit the buffer zone that earmarks.Equally preferably, as shown in Figure 9, before test recording area and afterwards, be equipped with a plurality of defect lists district.By before the test recording area of each recording layer and the defect list district is provided afterwards, even, also can reduce to damage the danger of all data in the defect list district in the displacement of record data process middle orbit.In addition, in the process that is recording information to a certain recording layer, focus on displacement, can reduce to damage the danger of all data in the defect list district of another recording layer.

In this embodiment, only be equipped with the defect list district in the inner round portion of each recording layer.With regard to same insight, the defect list district can be provided in the outer ring part.By this outer ring part is provided, can prevent owing to test record damages data in the defect list district.

Notice that the special parameter of each recording layer and format information can be recorded in the single optical disc information district together.Alternatively, each recording layer can comprise parameter and format information separately.

As shown in Figure 10, the test recording area in each recording layer can be positioned in the different radial positions.Figure 10 shows CD 1000, and the improvement embodiment that this CD 1000 is CDs 900 comprises first substrate, 1005, the first recording layers 1004, bonding coat 1003, the second recording layers 1002 and first substrate 1001.

Second substrate, 1001, the second recording layers 1002, bonding coat 1003, the first recording layers 1004 and first substrate 1005 correspond respectively to second substrate, 901, the second recording layers 902, bonding coat 903, the first recording layers 904 and first substrate 905.Except the position difference of test recording area, second recording layer 1002 and first recording layer 1004 have the part identical with first recording layer 904 with second recording layer 902 respectively.Second recording layer 1002 comprises test recording area 1008.First recording layer 1004 comprises test recording area 1007.

Reference number 1009 expression incident lights.Reference number 1010 expressions are from the light of second recording layer, 1002 reflections.Reference number 1011 expressions see through the light of second recording layer 1002.Reference number 1012 expressions are from the light of first recording layer, 1004 reflections.Reference number 1013 expressions see through the light of second recording layer 1002.These reference numbers are represented the path of laser.When reproducing on second recording layer 1002, reflected light 1010 is main playback lights, is the unnecessary light that departs from and see through light 1013.When reproducing on first recording layer 1004, seeing through light 1013 is main playback lights, and reflected light 1010 is the unnecessary light that departs from.

Supposition now has been equipped with the test recording area of the laser radiation energy that is used for determining the data in the record recording layer 1004 on the position in zone 1006.In this case, if test recording area 1008 is degenerated or damaged (for example, because record repeats), change at the transmission coefficient or the reflection coefficient of second recording layer 1002, thereby caused transmitted light 1011, the variation of reflected light 1010 and transmitted light 1013.Therefore, just often different with test recording area 1008, the irradiation energy value that use test recording areas 1006 obtains has departed from correct irradiation energy.

As shown in Figure 10, by test recording area 1007 and test recording area 1008 are provided in the different radial positions of CD 1000, even when test recording area 1008 is degenerated or damaged, also can determine to be fit to the laser radiation energy value of first recording layer 1004 rightly.

As mentioned above, when CD 1000 are the CD-write once read manies that can only write down once, the CD that particularly has irreversible recording sheet, the light characteristic of this irreversible recording sheet changes by record, and at this moment the test recording area of each recording layer is very effective in Different Diameter to locational arrangement.The present invention is applied on this CD that can only write down once.

In this embodiment, the stacked recording areas in each recording layer is to provide in different radial positions.Alternatively, except test recording area, in the different radial positions of each recording layer, placed the zone of tabulation of for example being used for managing all data that write down in the CD or the like, this zone is repeated recording scheduled number of times, the multiplicity that writes down in the zone of this pre-determined number greater than the conventional user data of record.By on different positions, being equipped with such zone, can place in one deck should the zone degradation effects this zone in another layer, therefore can in this zone of another layer, write down and reproduce.

In this embodiment, test recording area 1007 is to provide on the limit, outer ring about radial direction.Alternatively, test recording area 1008 can be to provide on the limit, outer ring about radial direction.For example, under the situation of the recoding/reproduction direction shown in Fig. 5 C, can bring into use test recording area 1007 from the inner ring limit, and bring into use test recording area 1008 from the limit, outer ring.In this case, when use test recording areas 1008, the probability that the outmost turns limit of test recording area 1007 does not have to use is greater than the probability when it uses.Therefore, can further reduce the influence of the degeneration of test recording area 1007 to test recording area 1008.For the CD that can only write down once, this influence is very big.

In this embodiment, only be equipped with test recording area on the inner ring limit.Alternatively, can be equipped with test recording area on the limit, outer ring.

The invention is not restricted to have the CD that can write down recording layer.Have the optical disc information district if having a plurality of CDs that only reproduce recording layer, then can obtain identical effect according to the present invention.

In this embodiment, at two-layer i.e. first recording layer and the enterprising line item of second recording layer.In the time of on presenting invention can be applied to single-layer optical disc, can obtain identical effect.

In this embodiment, rewritable optical disc has mainly been described.The present invention may be used on carrying out once or several times on the CD-R of record, and can obtain identical effect.

Commercial Application

According to CD of the present invention, be recorded in together in the single optical disc information district at the enterprising line item of recording layer and the special parameter and the form that reproduce each required recording layer.Have this feature, can from single optical disc information district, reproduce the parameter and the form of each recording layer, thereby can reduce a plurality of recording layer data recording and required time of reproduction.

On the basis that does not deviate from scope and spirit of the present invention, it will be appreciated by those skilled in the art that and make easily various other modifications.Therefore, the scope of appended here claim does not attempt to be limited to the instructions of setting forth here, but should explain widely claim.

Claims (3)

1. information media comprises:

A plurality of layers, at least one described a plurality of layers layer is a key horizon, this key horizon comprises:

First district, this first district comprise the dish block of information and second district that has stored dish information on it, and this second district comprises the data field;

Wherein between described a plurality of layer, the surface distance layer farthest that information that is positioned at described information media is read is as described key horizon.

2. signal conditioning package, be used to carry out for the reproduction of the information of information media and one of them of record, this information media comprises: a plurality of layers, at least one described a plurality of layers layer is a key horizon, this key horizon comprises: first district, this first district comprises the dish block of information and second district that has stored dish information on it, and this second district comprises the data field; Wherein between described a plurality of layer, the surface distance layer farthest that information that is positioned at described information media is read is as described key horizon,

This signal conditioning package comprises:

The shaven head part can be carried out for the optical reproduction of the information of described information media or one of them of record; With

Control section is used to control described bare headed part, and wherein the control to described shaven head part comprises:

Indicate described bare headed part reproduction dish information;

Obtain the dish information of reproduction; And

Based on the dish information that is obtained, indicate described shaven head part to reproduce or write down the information of described information media.

3. information processing method, be used to carry out for the reproduction of the information of information media and one of them of record, this information media comprises: a plurality of layers, at least one described a plurality of layers layer is a key horizon, this key horizon comprises: first district, this first district comprises the dish block of information and second district that has stored dish information on it, and this second district comprises the data field; Wherein between described a plurality of layer, the surface distance layer farthest that information that is positioned at described information media is read is as described key horizon,

This information processing method comprises the following steps:

Utilization shaven head part is carried out for the optical reproduction of the information of described information media or one of them of record; With

Utilize control section to control described bare headed part, wherein the control to described shaven head part comprises:

Indicate described bare headed part reproduction dish information;

Obtain the dish information of reproduction; And

Based on the dish information that is obtained, indicate described shaven head part to reproduce or write down the information of described information media.

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