CN101258547A - Bd9 hybrid disc and copy protection system therefor - Google Patents

Abstract

The present invention provides a drive, a method of operating the drive and a hybrid disc, BD9, comprising the physical layer of a dual layer DVD disc, DVD9, and the application layer of a Blu-ray disc (BD). The disc comprises a reserved area containing a modulation code and a file structure of the application layer and a BD-ROM mark for a copy protection system (CPS) according to the established BD-ROM format. The disc is readable by a conventional DVD drive, but the firmware and specific hardware and software (47,48,49) for detecting the BD- ROM mark is used. In this way, present DVD or BD drives need only firmware upgrades.

Description

BD9 mixing pan and copy protection system thereof

Technical field

The present invention relates to a kind of driver and function driver so that read the method for the optical data carrier that comprises the copy protection system (CPS) that is used for BD9 (Blu-ray disc), this method can be utilized again to the existing hardware of current developing BD system.The invention still further relates to optical data carrier.

Background technology

The disclosed patented claim No.2004/0264694A1 of the U.S. has disclosed a kind of high density compact disc, a kind of enciphered data and encrypted data has been recorded in method on this high density compact disc.High density compact disc such as blu-ray disc read storer (BD-ROM) has the helical track that comprises data.Data can be encrypted with dish radius information or the AU number that is included in the address location (AU), more encrypted data are recorded on the high density compact disc.Therefore, can prevent that the user who holds the compact disk equipment such as the BD-RE player from unlawfully upward and unlawfully reproducing the data that copied with the copying data of BD-ROM to BD-RE.

WO 2004/075187 has disclosed a kind of information carrier that is used to keep user profile.This information carrier comprises the visit information that is rendered as the access information bits form that is used for calling party information.Access information bits is being stored on the information carrier by the parameter variation pattern that comprehensive detection detects.Access information bits is according to predetermined method for scrambling scrambling.By according to predetermined method for scrambling to the access information bits scrambling, just can not detect visit information as long as know method for scrambling.If know how to handle the resulting signal in back, zone that comprises access information bits reading, use the comprehensive detection technology so only to produce visit information.So just can further prevent illegally obtaining to user profile.

WO 2004/075188 relates to a kind of information carrier that is used to keep user profile.This information carrier comprises the visit information that is used for calling party information.Visit information is stored in the predetermined first area on the information carrier.This information carrier also comprises the other zone that comprises fake information that at least one is different with the first area.This invention has to a certain degree increase based on the noise level of recognizing read output signal in hiding the zone of visit information.For fear of the difference that has and do not have this noise level between the zone of visit information, a specific region of information carrier is given in a visit information assignment, and fake information also writes other zones.Therefore, realized the improved copy protection system that prevents from the illegal sense information carrier to exist maybe the user profile that will exist.

The technology contents of all these three open source literatures is all quoted in this manual as a reference.

At present just be called BD9 in question new form.This BD9 form uses the Physical layer of DVD-dual layer dish (DVD9), but has the application layer of BD.Therefore, the BD9 form is a kind of mixed format.

The physical appearance of BD9 dish is identical with the DVD9 dish basically, comprises two layers, can hold the data up to 7.95GB.The DVD dish has the cover thickness of 0.6mm, the gauge of 740nm and the channel bit length of 146.7nm.Use the laser of wavelength as 650nm when reading, numerical aperture NA is 0.60 or 0.65.

Application layer is the interactive with it layer of user.It comprises that the user can be used for all interactions that dish is operated, the ability of such as the menu structure in the DVD dish, perhaps start little application, select captions and sound, playing games etc.

The BD9 dish is the ROM dish, that is to say that it can not record.It is encoded to data with pit and gap.

In order to obtain with DVD driver compatibility and can to coil, below consider and to be suitable for by the BD9 that the DVD driver is read.Under following constraint, stipulate the layout of DVD9 dish again:

1. current DVD ROM driver should not collapse when reading the BD9 dish.Yet current DVD ROM driver may not be visited the BD9 data.

2. can that is to say not require change hardware by firmware updating only, current BD ROM driver is converted to make it can read the BD9 dish.

Basic thought is to allow the DVD ROM driver of standard believe that dish is general DVD9 dish, just has very little main-data area.The main data area should can tell the user that this is the single file of a special BD9 dish or the ISO9660 file system of one group of file even as big as comprising at least to have.For this reason, the main data area of 5MB is just more than sufficient.Owing to have two-layerly, every layer main data area has only 2.5MB, and the mesozone tightens at layer 0 and begins after being connected on 2.5MB.Provide further discussion below to the solution route of this BD9.

Most BD driver can be read one or more forms of CD, DVD and BD.As mentioned above, such BD driver should only need to change firmware just can read the BD9 dish.Yet, as mentioned above, the DVD driver does not change firmware and should not collapse, should be able to be for example to identify this dish be an incompatible dish by reading file in the above mentioned zone that is configured in little DVD and so on or file group, described file or file group can show that this dish is one and can only coils with the BD9 that driver of future generation (BD driver) read to the user.

BD9 dish (in general) can not be read with the BD driver that can only read the BD dish, because the physical format of BD9 dish is the physical format of DVD dish.Yet, believe that most BD driver also can read DVD (and CD) dish.The BD9 dish can not can not be read the CD driver of DVD dish with reading the CD dish and read.

Except other features, the BD-ROM form also comprises copy protection system especially, and desirable is also copy protection system to be included in the BD9 form.

Summary of the invention

An object of the present invention is to provide a kind of driver and this driver of operation and make its suitable method of handling new BD9 form.

Another object of the present invention provides a kind of copy protection system that is used for optical data carrier, and this copy protection system can be by the BD drive processes of current use or exploitation, and does not need to change hardware wherein.

According to the present invention, from the CPS key signal of BD9 dish be configured to the BD class signal seemingly, therefore can carry out detection with existing platform to the CPS key.So, realize that BD9 CPS system only need change the firmware of BD driver.

According to one aspect of the present invention, provide a kind of initialization driver so that read to comprise the Physical layer of DVD-dual layer form and the method for the BD9 formatted data carrier of the application layer of blue light BD form, this method comprises: optical data carrier is inserted driver, determining the form optical data carrier such as CD, DVD, the BD and to select the corresponding optical pick-up unit of reading, such as for CD or DVD with red laser or for the BD blue laser; Read the dish information in the promoter region that is included in data carrier and corresponding information is stored in the storer; If data carrier is the DVD form, whether the specified data carrier is the BD9 form; If the specified data carrier is the BD9 form, with the hardware and software that is fit to read the BD-ROM mark with read to comprise the reserved area of described BD-ROM mark with the optical pick-up unit that is fit to read the DVD form; And definite decruption key and key is stored in the storer.

In an embodiment of this method, whether described specified data carrier is that the information by reading to comprise the disc-type such as CD/DVD/BD for example, the information, the promoter region of writing the information of strategy of media type such as R, RAM, RW realize for the BD9 form, with these information stores in described storer.This method can also comprise: the data of reading optical data carrier; With described decruption key data are deciphered; And send through the decrypted data signal.

In yet another aspect, a kind of driver is provided, this driver of initialization so that read comprises the BD9 formatted data carrier of the application layer of the Physical layer of DVD-dual layer form and blue light BD form, and this driver comprises: the receiving trap that is used for receiving the optical data carrier of driver; Be used for determining that optical data carrier is such as CD, DVD, the selection circuit of the form of BD and so on and the corresponding optical pick-up unit of reading of selection, such as for CD or DVD with red laser or for the BD blue laser, to read the dish information in the promoter region that is included in data carrier and corresponding information be stored in the storer, whether be BD9 form and read to comprise the reserved area of BD-ROM mark if being used for the specified data carrier, and be used for selecting to be fit to read the hardware and software of described BD-ROM mark and use the selection circuit of the optical pick-up unit that is fit to read the DVD form; Thereby described hardware and software is fit to determine decruption key and key is stored in the storer.

In one embodiment, the optical pick-up unit that is fit to read the DVD form also be fit to read to comprise the disc-type such as CD/DVD/BD for example information, the media type such as R, RAM, RW information and write the promoter region of the information of strategy, with these information stores in described storer.Be fit to read the data that the optical pick-up unit of DVD form can also be fit to read optical data carrier.This driver can also comprise with described decruption key to data deciphering with send circuit through the decrypted data signal.

According to another aspect of the present invention; the optical data carrier (BD9) of the application layer of a kind of Physical layer that comprises DVD-dual layer system (DVD9) and blu-ray system (BD) is provided; this optical data carrier is included in the modulation code that contains application layer on the carrier and the reserved area of file structure, disposes the BD-ROM mark that is used for copy protection system in this reserved area.

In one embodiment, the reserved area can be configured in carrier be in radius from about 21.0mm in the zone of the inner radius of 24.0mm.The advantage of this configuration is that driver can be read the BD-ROM mark relatively quickly.

The radius that is in the second layer (L1) that the reserved area can be configured in carrier is in the zone of the inner radius to about the 24.0mm about 22.2mm or 22.5mm, and the radius that burst cuts off district (BCA) of generally including of ground floor (L0) does not comprise that from the respective regions to about the 24.0mm about 22.2mm described burst cuts off district (BCA).Perhaps, described burst cut off district (BCA) can be configured in the ground floor inside radius from about 21.3mm to 22.2mm.The advantage of this configuration is to detect the BD-ROM mark relatively quickly, and the risk that the DVD driver of previously known can be collapsed reduces to minimum simultaneously.

Perhaps, the reserved area can be configured in radius from about 24.0mm in the mesozone of 58.0mm.Or, the reserved area be configured in carrier be in radius from about 58.0mm in the zone of the outer radius of 58.5mm.The advantage of these solution routes is to make the reserved area greatly to satisfying the demand, but this be with the required time of start-up course be cost.

In another embodiment, in the reserved area with the bowl configurations that waves that comprises the BD-ROM mark.Modulation code can be the 17pp modulation code.The main data area can comprise that at least one meets the file of traditional DVD form such as the ISO9660 file system, and this document contains tells that this carrier of user is the information of a special BD9 dish.This carrier can read with traditional DVD driver for the sub-district of containing the ISO9660 file system, and can be with the BD drivers decode that may comprise that firmware is adaptive.The BD-ROM mark can be configured to be in the bowl configurations that waves in the described reserved area.

Description of drawings

From below in conjunction with can being clear that some other purpose of the present invention, feature and advantage embodiments of the invention and the detailed description of the invention in conjunction with the accompanying drawings, in these accompanying drawings:

Fig. 1 is the synoptic diagram of first embodiment of the layout of BD9 dish;

Fig. 2 is the synoptic diagram of the block of information of dual layer discs;

Fig. 3 is the synoptic diagram of second embodiment of the layout of BD9 dish; And

Fig. 4 is the block scheme that comprises according to the adaptive driver of firmware of the present invention.

Embodiment

The dish that meets the BD-ROM physical format of new regulation comprises following each zone:

The block of information is divided into some to have from the annular region of the certain radius of disk center's measurement.

Dish comprises the clamp area of a radius from 11.5mm to 16.5mm, and its mid-game is by the 53 (see figure 4) physics clampings of dish connected system, is that the center pit of 7.5mm or opening are connected on the driving shaft that makes the motor that dish rotates by radius.

The zone of transition of a radius from 16.5mm to 21.0mm arranged after the clamp area.

Be the BCA (burst cut off district) of radius from 21.0mm to 22.0mm then, comprise a series of certain information of the antiradar reflectivity striped of configuration along the circumferential direction that are rendered as.Information in the BCA zone is usually included in the individual pen, similar bar code repeated several times.

After this, be Lead-In Area 11,22.0mm plays 24.0mm from radius.Lead-In Area can comprise certain information, such as protection 1, PIC (permanent information and control data), protection 2, INFO2, reservation, INFO1.

The data field is configured in the position of radius from 24.0mm to 58.0mm.

At last, from 58.0mm to 58.5mm, dispose leading-out zone at radius.

The DVD-ROM dish has following data:

BCA：22.3mm-23.5mm

Lead-In Area: 23.88mm-24.0mm

Data field 24.0mm-

Fig. 1 shows the block of information of BD9 dish.

Be main data area 12 behind Lead-In Area, radius is (maximum) from 24.0mm to 58mm.

Be mesozone 13 behind main data area 12, radius is from 58mm to 58.5mm.This is the BD9 data field.The mesozone can earlier begin after the small documents system immediately, and is as described below.

The BD9 dish is a dual layer discs, repeats identical structure at second recording layer by another order, i.e. mesozone 14, main data area 15 and leading-out zone 16.The BD9 dish is read-only disk (ROM).

Figure 2 illustrates the conventional information structure of BD-RE dish, comprise Lead-In Area, data field 0, the outside area 0 and the outside area 1 that all is in the second recording layer L 1, data field 1 and the leading-out zone that all are in the first recording layer L0.In addition, also show substrate and tectal position and light beam.

As mentioned above, under following constraint, stipulate the layout that BD9 coils again:

1. current DVD ROM driver should not collapse when reading the BD9 dish.Yet current DVD ROM driver may not be visited the BD9 data.

2. can that is to say not require change hardware by firmware updating only, current BD ROM driver is converted to make it can read the BD9 dish.

Basic thought is to allow the DVD ROM driver of standard believe that dish is general DVD9 dish, just has very little main-data area. Main data area 12 and 15 should even as big as comprise at least have can notify the user this be the single file of a special BD9 dish or the ISO9660 file system (file system of in meeting the DVD of general standard, using) of one group of file.For this reason, the main data area of 5MB is just more than sufficient.Owing to have two-layerly, thereby every layer main data area has only 2.5MB, this means that mesozone 13,14 tightens at every layer to begin after being connected on 2.5MB.

In another embodiment, use be following solution route, rather than on the BD9 dish, form a little DVD session and with BD9 in be received within the very large mesozone.For example in the DVD+RW, adopt a notion that is called general application area GAA at some driver.This GAA can be used to prevent to cause the situation of fault in existing DVD driver as for example BD9 coils.GAA has stipulated in the district little file system, and it can contain just like " this is the BD9 dish, can only read with the BD player " such message.Each existing DVD driver be can't see anything else except this little panel, and plays this limited content.Yet the BD9 player is familiar with it, and knowing has second file system that contains BD9 information.In this embodiment, concerning BD9, do not need the mesozone, but all data are configured in the main data area all.It is identical that current DVD layout keeps, and nearly all existing driver is all known the GAA notion.

That should follow has a following governing principle:

1. the sector leader should be general

A. physical address should be general

B. the sector auxiliary information byte should be indicated each panel of Lead-In Area, leading-out zone, main data area and mesozone.The district is during solution route in use, and all sectors of containing the BD9 content all are designated as " mesozone ", be included in radius from about 24.0mm to about the 58.0mm.

The c.CPRMAI byte must all be zero everywhere on whole dish, perhaps is used for the CSS of the video in the main data area is encrypted.The CPRMAI byte is relevant with the copyright management information of DVD dish.They should be zero, because what use on BD9 is different copyright system.CSS is meant Content Scrambling System, is the common name of DVD copy protection system.

2. control data zone should have the general content at the DVD form:

A. the book type/version should be 0x01, indicates in control data zone, and control data zone comprises information that driver is read from dish and the essential information that comprises dish when starting, such as the information of dish according to which standard manufacture.

B. as the DVD9 dish, every other byte also is general.

C. be configured in the control data zone, say more specifically that byte 1024...2048 in the physical format information part that is configured in control data zone is current in DVD, to keep, but when the layout of using in the mesozone, can be used to stipulate where be the BD9 part.The ROM mark will be used for just identifying.Therefore, this in control zone zone only need tell the border of BD9 driver BD9 data field and for the physical address of layer 0 and layer 1 to the logical address mapping.

The additional information of the BD9 of relevant this format is as follows:

The reading speed of being advised is 3 times of existing ECMA standard that are used for DVD, equals 33Mbps on the red laser disk drive.

On some parameters such as excentricity and imbalance, more strict tolerance is arranged.

File system is with identical for BD25/50 (UDF2.6).

Use: identical with BD25/50 (BD-MV and BD-J).

Content protecting: identical with BD-ROM 25/50; Only need minimum change for different physical disks; Stability at least with BD-ROM 25/50 on identical level.

For the BD-ROM dish, developed the copy protection system CPS that comprises the BD-ROM mark already, this BD-ROM is labeled as the key that waves of available comprehensive detection technology for detection, for example sees WO 2004/075187.

The BD-ROM mark comprises key, and this key is used for the data decode that exists in the data field to BD-ROM dish with other Copy Protection measures.BD-ROM promptly reads before real data is read during being marked at the initial phase of driver.Usually, the BD-ROM mark can be the visit information that is stored in the PIC district of information carrier.Information carrier comprises so-called permanent information and control data (PIC) district.In this PIC district, store general information and various other information of information carrier.Like this, can create a data channel of recorded information in advance that is used for enough capacity and data transfer rate.The PIC information stores is in the pit/gap of writing down in advance, but this information also can be stored in the signal of the quite big bandwidth of usefulness in high frequency modulated (HFM) groove of the record in advance of radial modulation.Because information stores in oscillation channel, therefore can be created a buried passage.In order to read visit information, can retrieve with certain method for the index of the position of visit information in the PIC district.The PIC district comprises the main data channel that has address location number (AUN).These AUN are used to refer to the starting position of visit information in the PIC district.This is possible, because the oscillation channel signal is locked on the data-signal (HF-passage).The address is 4 bytes (nibble) (not having the ECC byte).Because the PIC district only is in the sub-fraction of information carrier, therefore in the PIC district, have only the minimum effective bit (lsb) of 32 limited bits to change (being first lsb usually).These 16 bits are enough to determine the position in the PIC district.PIC has extended in the district about 2000 tracks; Suppose that visit information only exists in 20 tracks in succession, the starting position of this visit information is determined according to user profile with AUN.So preceding 16 lsb of this AUN for example use through the modulation arrangement of descrambling in whole PIC district everywhere.Therefore, during random site in arriving the PIC district, just can read preceding 16 bits of AUN, jump to the starting position of visit information, and read visit information.Like this, the exact position of visit information further is hidden in the PIC district, because it just is in the certain position in this band, rather than entire belt everywhere.

Visit information is with waving the PIC district that bowl configurations writes dish.The master data that is included in the bowl configurations comprises common PIC information (driver is cancelled information, dish information).Visit information can be to coiling the required key part of user profile decoding.The amplitude that waves is little, and for example peak-to-peak value is 5-10nm.Like this, wig-wag signal is that noise is very serious, directly copy.

So concerning the BD9 dish that a modified DVD with application layer of blu-ray system coils, desirable being to use and the similar copy protection system that the BD-ROM dish has been proposed.Like this, just can use and the identical hardware and software that is used for BD ROM copy protection system.The BD driver can comprise copy protection system for the software of BD-ROM system development is modified as by comprising.

According to the present invention, this purpose is to be transformed into by the BD ROM mark that will be used for the BD-ROM system to can be used for the BD9 system and realize.The BD9 dish makes new BD driver can read this file further through overregulating.New BD driver is normally with former dvd system compatibility, thus they can to read physically be the BD9 dish of a DVD dish.

In order to achieve this end, on the BD9 dish, keep a reserved area, contain the modulation code (17pp modulation code) that uses by the BD system and full RUB (recording unit block) structure of BD system, rather than the EFMPlus RLL (the limited distance of swimming is grown) modulation code and the frame structure that use by dvd system.The modulation code that is used by the BD system is the 17PP modulation code (1,7RLL sign indicating number) of distance of swimming length from 2T to 8T, and is distance of swimming length 2,10 yards from 3T to 11T by the modulation code that former dvd system uses.In order this modulation code to be described, for example to see the ECMA Standard N r 267 that specifies 120mm DVD read-only disk, this standard can openly be downloaded from the ECMA network address.

Reserved area can be in Lead-In Area, leading-out zone or the mesozone of dish.In special area, data write with the BD-ROM form with 17pp modulation code.In this zone, write as the BD-ROM mark that comprises physics with waving bowl configurations.This means that the existing hardware that detects the BD-ROM mark of developing for the BD copy protection system also can be used for BD9.In all new BD drivers, all comprise this hardware.In addition, can also use same software.

With with same mode used in BD-ROM, the BD9 mark will comprise key, this key is used for the data decryption that exists in the data field to BD9 dish with other Copy Protection measures.

Should change over to make and reach detection time waving amplitude with identical under BD-ROM mark situation.Because how much do not changing readout time as at the datum velocity of BD9 the time with 3 times DVD speed, suitably convergent-divergent waves amplitude and should obtain identical key detection time.

May need gauge is increased to from used 350nm in writing the BD PIC zone of BD ROM mark the 740nm of dvd system.If the BD ROM mark that can make driver detect BD9 becomes easier, then can change gauge and channel bit length to a certain extent.

The gauge of BD ROM mark is 350nm, and the gauge in the data field is 320nm.If gauge λ/NA convergent-divergent just can obtain following table:

BD-ROM BD9，NA＝0.6 BD9，NA＝0.65

320nm 727nm 671nm

350nm 796nm 734nm

The gauge of DVD is 740nm, greater than the interior value from the 320nm convergent-divergent of table.In the worst case, the gauge of BD9ROM mark need be 796nm, for example 800nm.

The BD9ROM mark can be placed with upper/lower positions:

1) the BD9ROM mark is configured in Lead-In Area 11 (see figure 1)s.Two INFO (or buffering) district is arranged in dvd system, 2724mm and 2905mm length are arranged respectively along track.16 RUB that zoom to BD9 can be contained in the INFO1 district, and INFO2 can comprise 17 RUB (gauge is 740nm).RUB available in this solution is less relatively.

2) the BD9ROM mark is configured in the mesozone 13,14.Under the DVD situation, be not defined in the sector number in the mesozone, therefore can use all to detect the required space of BD9ROM mark.If a RUB is that 175mm is long, just need 175m for 1000 RUB so, these RUB can be configured in the periphery of radius from 58.41mm to 58.5mm of dish.

3) the BD9ROM mark is configured in the leading-out zone 16 of the inner radius (if words of OTP) that is in dish.Suppose that gauge is 800nm, 1000 RUB are fit at radius 22.6mm between the 23.56mm so.

The position of 17pp zone on BD9 should be selected to be with existing DVD startup configuration in no case can cause the startup problem.For the mesozone of BD9 dish really like this.

Some other consideration cause using such as near importing or leading-out zone in the layer 0 of lens.

The content of main data area 12,15 can be any data, this means that this zone can be used for including in further Copy Protection measure.

Must revise the parameter of BD-ROM for the BD9 form.

The parameter of DVD is as follows:

Wavelength 650nm

NA_1 0.6

NA_2 0.65

cbl(DL?DVD) 146.7nm

Tp (gauge) 740nm

Reading speed 3.84m/s

The parameter of BD-ROM is as follows:

Wavelength 405nm

NA_1 0.85

cbl(@23.3BG) 80nm

cbl(@25BG) 74.5nm

tp(@PIC) 350nm

Tp (PIC is outer) 320nm

Reading speed (@23.3BG) 5.28m/s

Reading speed (@25BG) 4.917m/s

This parameter causes the linear scale factor:

Zoom factor 1 (BD9_1) 2.273662551

Zoom factor 1 (BD9_2) 2.098765432

The length that zooms to the 17pp RUB length of BD9 will be:

BD BD9_1 BD9_2

NA＝0.85 NA＝0.60 NA＝0.65

The length (@23.3BG of RUB) 76.97088 175.0058074 161.5438222

The length (@25BG of RUB) 77.679132 162.9741581 150.4376844

The signal frequency of the BD9ROM mark of 3 times of DVD reading speeds will be (speed calculation of BD relatively):

BD-ROM BD9_1 BD9_2

NA＝0.85 NA＝0.60 NA＝0.65

23.3GB1 0.959605 1.039572

25GB1 1.030448 1.116319

Various layout is possible in Lead-In Area.Following these radial location of imagination:

The layout 1 that causes 351 RUB of BD9ROM mark:

Beginning radius (mm) stops radius (mm)

DVD?BCA 22.3 23.55

BD9ROM mark 23.55 23.88

Lead-In Area 23.88 24

(4096 DVD sectors)

Data field 24-

The layout 2 that causes 1737 RUB of BD9ROM mark:

Beginning radius (mm) stops radius (mm)

DVD?BCA 21.3 22.2

BD9ROM mark 22.2 23.88

Lead-In Area 23.88 24

(4096 DVD sectors)

Data field 24-

The layout 3 that causes 978 RUB of BD9ROM mark:

Beginning radius (mm) stops radius (mm)

BD9 ROM mark 21.3 22.3

DVD?BCA 22.3 23.55

Lead-In Area 23.88 24

(4096 DVD sectors)

Data field 24-

The channel bit length of 17pp modulation code (cbl) should be modified as the length near DVD, is 146.7nm for DVD-dual layer.The channel bit length of BD 25 GB is 75nm, causes 1.956 times increase.Gauge also will increase to the 740nm of DVD from 350nm, increase the factor and be similarly about 2 times.If can make driver detect the more easy words of BD ROM mark of BD9, gauge and cbl can be changed.

Further consider to be:

The content of main channel can be random in the 17pp part of BD9 dish.The main channel is included in the information in the general data signal that draws from pit and ridge.

In DVD, there is not standard at the radial push pull PP signal of the radial position of controlling the optical tracking unit.

Detect BD ROM mark and need this PP signal.Therefore, the BD9 dish need have fully big PP signal.Can form with BD ROM in the comparable standardization of signal PP signal.By this way, can produce and have little invisibility with detectability and have and the identical BD9ROM mark that waves amplitude used in BD-ROM.The relevant BD-ROM signal that detects the BD-ROM mark is radially PP signal and HF signal.

The position of 17pp zone on BD9 can be chosen to start configuration with existing DVD in no case can cause the startup problem.Possible position is that the 17pp zone is arranged in the mesozone 13,14 of BD9 dish.

Fig. 3 shows another embodiment of BD ROM mark configuration.BD ROM mark is configured in behind the leading-out zone of second layer L1 at 23.4mm to the radius between the 22.2mm.In this embodiment, not disposing burst before the Lead-In Area in ground floor L0 and cutting off district BCA, because there is BCA may disturb the risk of reading, because the zone of the position of common DVD BCA and configuration BD ROM mark overlaps ROM mark in the L1.Yet, if wish that BCA on the BD9 dish, just can use BD BCA.This BD BCA uses the zone from 21.3mm to 22.2mm, can not disturb the BD ROM mark in the L1.Can finish some surplus is set by the ROM marker ligand being set to, because enough spaces are arranged at the 22.5mm place.Therefore, the layer L1 of BD9 dish goes up BD ROM marked region from 22.2mm (22.5mm) to 23.4mm and contains and can make and can use identical hardware when detection BD ROM mark according to writing the 17pp data of ROM mark with the identical form of defined in BD ROM.

In BD ROM, the detection time of BD ROM mark is usually about 30ms.Because what datum velocity can be with the DVD bilayer in BD9 is identical, is 3.84m/s, be BD 25 GB 4.917m/s 1/1.28th, and the RUB behind the convergent-divergent from BD-ROM to BD9 is 1.956 times, therefore will more longer common detection time, be generally 75ms, and this is an acceptable.

Be that the BD9 dish contains the Physical layer of DVD, and has only little zone to have the 17pp sign indicating number, with permission CPS information is write in this zone what this explanation that the realization that is used for BD9 is done was done.Another possibility is to have the BD9 that does not have the DVD Physical layer but have BD to zoom to the Physical layer (so data can be read with the dvd pickup device) of DVD to coil.So whole dish will contain the 17pp sign indicating number, so BD9 will just in time be the full format BD-ROM dish that zooms to DVD.Yet this has a shortcoming, these ECC pieces through the BD of convergent-divergent form will be dispersed in dish inner radius more than a circle on.This has reduced the error correcting capability of system, because radially cut is crossed out some bytes in same ECC piece probably.

Can by include in current BD ROM driver be used to detect the hardware of BD9 ROM mark and include that thereby firmware is adaptive to be modified as readable BD9 dish with traditional DVD driver in.

Dish comprises the data of BD9 form and comprises that in the main data area having only of DVD form for example is the small documents of 5MB in the mesozone.Yet, might dispose some bigger can be with the file that for example comprises a given data of DVD drive read.Therefore, the main data area can have any size, and such as 700MB, and remaining can be used for the BD9 data.

When driver starts, take following action.At first be that driver is attempted dish is identified as CD, DVD or BD.There are some to be used for the algorithm of this purpose.

In case driver knows that it is CD/DVD or BD, it just switches to and reads the required correct optical devices of this specific format in the optical pick-up unit (OPU).

Then, driver will proceed to the Lead-In Area of dish, read to contain " startup " district of the extraneous information relevant with dish that is called dish information.This can be (but not being exclusiveness): reaffirm dish (CD, DVD or BD), and media type (R, ROM or RW), but write strategy under the writing format situation, or the like.

For existing DVD special purpose driver is not collapsed, need during start-up course, avoid the 17pp sign indicating number that it can not discern.Therefore, the BD-ROM mark is put in Lead-In Area may be caused some problems in this.

Perhaps, the BD-ROM mark can be configured in the mesozone or external diameter of dish.Yet the shortcoming of this configuration is not convenient like this for starting: driver at first is identified as the DVD dish with the BD9 dish, and will start with the dvd pickup device, begins to read dish information, knows that from dish information this dish is actually a BD9 dish.Optical devices are correct optical devices, but need extra start-up course, promptly search the BD-ROM mark.If the BD-ROM mark is in the mesozone or outside area, driver need proceed to the mesozone or the outside area in the outside that is in dish so, and the current Lead-In Area that is in of OPU.Big redirect will spend valuable start-up time, this means under the situation of the start-up course of wishing that BD-ROM is marked at and do not disturb existing DVD special purpose driver as far as possible near Lead-In Area.

Therefore, this embodiment shown in Figure 3 is a good replacement scheme.The BD-ROM mark is arranged in the BCA district, yet on object lens layer farthest.It is near Lead-In Area, but from its as far as being enough in most of the cases to avoid the DVD special purpose driver collapse when starting, to occur.

Common starting process is as follows:

1) difference CD/DVD/BD

2) select correct OPU and the correct CD/DVD/BD circuit of selection

3) begin to read dish information

4) beginning read/write data

Can read under the situation of BD9 some change of this process at the BD driver.Firmware modification becomes to occur following operation:

1) difference CD/DVD/BD

2) select correct OPU

3) begin to read dish information

4), select correct CD/DVD/BD circuit according to the result of step 1) if not BD9 dish

5) if what insert is the BD9 dish, select DVD OPU, proceed to the ROM mark position, and select to detect the BD circuit of BD-ROM key

6) behind the acquisition key, proceed to the BD9 data field, switch to the DVD circuit of readback data.

Fig. 4 shows driver to be furnished with already for the adaptive block scheme of the firmware that can read the BD9 form.

Driver comprises optical pick-up unit, optical pick-up unit comprises infrared laser 40, red laser 41 and blue laser 42, these laser instruments are connected with second selector 44 with first selector 43, so that a laser instrument in the laser instrument 40,41,42 is connected to the circuit 45,46 and 47 of the signal that is used to handle CD, DVD and BD.Driver comprises and is used to determine that the dish that is inserted is CD, DVD or the algorithm of BD that it is controlled selector switch 43,44.

BD circuit 47 comprises aiming at discerns the BD-ROM mark and adaptive hardware 48 and software 49.These hardware and softwares are used for detecting the BR-ROM mark, can determine decruption key according to the BR-ROM mark, with decruption key in other parameters are stored in storer 50.

According to the present invention, also comprise another selector switch 51, be configured to circuit 47 and hardware 48 and software 49 insertion DVD circuit 46.Therefore, when BD9 dish is inserted driver, determine that this dish is the dish with the readable DVD type of selected red laser 41.Selector switch 44 is selected DVD circuit 46.When reading Lead-In Area, identifying this dish is the BD9 dish, and this activates selector switch 51, connects circuit 47 and hardware 48 and software and detects a CPS required time of key for 49.Circuit 47 and hardware 48 and software 49 identification and definite decruption keys, then with decruption key in other parameters are stored in parameter storage 52.It should be noted that selector switch 43,44,51 can be presented as the interior software of program of Control Driver.Though Fig. 4 shows the square frame or the circuit of the step of carrying out certain method, should understand these method step major parts and can carry out, as usual employing the in the field with software.

As can be seen from Fig. 4, use circuit 47, hardware 48 and the software 49 identical to detect BD9 with being used for traditional BD detection.Yet software 49 can be that process is duplicated rather than be used for two purposes.Yet according to the present invention, hardware 48 can be used for double duty at least, does not therefore need to add hardware.Yet in the new driver that comprises the BD9 compatibility, if be ready, hardware also can be through duplicating.

After detecting the ROM mark, switch 51 switches to DVD circuit 46 again, the data in the EFMplus sign indicating number that reads back.

What should emphasize is that in this instructions and claims, so-called " comprising " do not got rid of and also have other parts or step.In addition, though multiple arrangement, device or method step are listed separately, they can be realized with for example individual unit or processor.In addition, in different claims, may comprise independent feature, but these features can combine valuably, and in different claims, comprise different features and do not mean that these combination of features are not feasible and/or useful.In addition, singular reference is not got rid of plural number.Just example is clear to be provided label in claims as making, and this should be interpreted as what restriction is the scope to claim have.

Though abovely describe the present invention in conjunction with concrete aspect of the present invention and embodiment, this is not the concrete form that will limit the invention to here to be proposed.Say that precisely the present invention is only limited by appended claims, and in the scope that appended claims provides, the embodiment outside the above specific embodiment is possible equally.The present invention is only limited by appended patent claims.

Claims (18)

1. an initialization driver is to read the method for BD9 formatted data carrier, and described BD9 formatted data carrier comprises the Physical layer of DVD-dual layer form and the application layer of blue light BD form, and this method comprises:

Optical data carrier is inserted driver, so that determine the form of the optical data carrier such as CD, DVD, BD and select the corresponding optical pick-up unit of reading, such as for CD with infrared laser, for DVD with red laser or for BD with blue laser;

Read the dish information in the promoter region that is included in data carrier and corresponding information is stored in the storer;

It is characterized in that:

If data carrier is the DVD form, whether the specified data carrier is the BD9 form so;

If having determined data carrier is the BD9 form, use the reserved area that is fit to read the hardware and software (47,48,49) of BD-ROM mark and reads to comprise described BD-ROM mark with the optical pick-up unit that is fit to read the DVD form (41) so; And

Determine decruption key and this key is stored in the storer.

2. the method for claim 1, whether wherein said specified data carrier is that the information by reading to comprise the disc-type such as CD/DVD/BD, the information, the promoter region of writing the information of strategy of media type such as R, RAM, RW realize that these information are stored in the described storer for the BD9 form.

3. claim 1 or 2 method also comprise:

Read the data of optical data carrier;

With described decruption key data are deciphered;

Transmission is through the decrypted data signal.

4. driver that is used to carry out the method for above any one claim, described method is used for the initialization driver to read BD9 formatted data carrier, described BD9 formatted data carrier comprises the Physical layer of DVD-dual layer form and the application layer of blue light BD form, and this driver comprises:

Be used for receiving the receiving trap (53) of optical data carrier at driver;

Be used for determining the type of the optical data carrier such as CD, DVD, BD and selecting the corresponding optical pick-up unit of reading (40,41,42) selection circuit (43,44), such as for CD with infrared laser, for DVD with red laser or for BD with the blue laser, to read the dish information in the promoter region that is included in data carrier and corresponding information be stored in the storer (50,52);

It is characterized in that

Be used for the specified data carrier and whether be the BD9 form and be used to read comprise the selection circuit (51) of the reserved area of BD-ROM mark, be used for selecting to be fit to read the hardware and software (47 of described BD-ROM mark, 48,49) and use the optical pick-up unit (41) be fit to read the DVD form; Thereby described hardware and software (47,48,49) is fit to determine decruption key and this key is stored in the storer (52).

5. the driver of claim 4, the wherein said optical pick-up unit (41) that is fit to read the DVD form also be fit to read to comprise information, the media type such as R, RAM, RW of the disc-type such as CD/DVD/BD information, write the promoter region of the information of strategy, these information are stored in the described storer.

6. claim 4 or 5 driver, the data that the wherein said optical pick-up unit (41) that is fit to read the DVD form also is fit to read optical data carrier.

7. the driver of claim 6 also comprises with described decruption key to the data deciphering with send circuit (46) through the decrypted data signal.

8. the optical data carrier (BD9) of the application layer of Physical layer that comprises DVD-dual layer system (DVD9) and blu-ray system (BD) is characterized in that:

The reserved area that contains modulation code on carrier disposes the BD-ROM mark that is used for copy protection system in described reserved area.

9. what the carrier of claim 8, wherein said reserved area were configured in carrier is in radius approximately in the zone of the inner radius from 21.0mm to 24.0mm.

10. the carrier of claim 9, the radius that is in the second layer (L1) that wherein said reserved area is configured in carrier is in the zone of the inner radius to about the 24.0mm about 22.2mm or 22.5mm, and the radius that burst cuts off district (BCA) of generally including of ground floor (L0) does not comprise that from the respective regions to about the 24.0mm about 22.2mm described burst cuts off district (BCA).

11. the carrier of claim 10, wherein said burst cut off district (BCA) be configured in ground floor (L0) inside radius approximately from 21.3mm to 22.2mm.

12. the carrier of claim 8, wherein said reserved area are configured in radius approximately in the mesozone from 24.0mm to 58.0mm.

13. what the carrier of claim 8, wherein said reserved area were configured in dish is in radius approximately in the zone of the outer radius from 58.0mm to 58.5mm.

14. the carrier of any one claim in the claim 8 to 13, in the wherein said reserved area with the bowl configurations that waves that comprises the BD-ROM mark.

15. the carrier of any one claim in the claim 8 to 14, wherein said modulation code are the 17pp modulation code.

16. the carrier of any one claim in the claim 8 to 15, wherein the main data area comprises that at least one meets the file of traditional DVD form such as the ISO9660 file system, and this document contains tells that this carrier of user is the information of special BD9 carrier.

17. the carrier of any one claim in the claim 8 to 16, described carrier are with traditional DVD drive-readable and the available carrier that only comprises the BD drivers decode that firmware is adaptive.

18. the carrier of any one claim in the claim 8 to 17, wherein said BD-ROM marker ligand is set to the bowl configurations that waves that is in the described reserved area.

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