CN1707675B - Method for forming recording medium and apparatus and methods for reproducing data - Google Patents

Method for forming recording medium and apparatus and methods for reproducing data Download PDF

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Publication number
CN1707675B
CN1707675B CN2005100747468A CN200510074746A CN1707675B CN 1707675 B CN1707675 B CN 1707675B CN 2005100747468 A CN2005100747468 A CN 2005100747468A CN 200510074746 A CN200510074746 A CN 200510074746A CN 1707675 B CN1707675 B CN 1707675B
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China
Prior art keywords
data
recording medium
encryption
user data
link area
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Expired - Fee Related
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CN2005100747468A
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Chinese (zh)
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CN1707675A (en
Inventor
金进镛
徐相运
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LG Electronics Inc
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LG Electronics Inc
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Priority claimed from KR1020020067956A external-priority patent/KR100936711B1/en
Priority claimed from KR1020020077093A external-priority patent/KR100576165B1/en
Priority claimed from KR10-2002-0077094A external-priority patent/KR100513333B1/en
Priority claimed from KR1020020079818A external-priority patent/KR100576163B1/en
Priority claimed from KR1020020079819A external-priority patent/KR100952952B1/en
Priority claimed from KR1020030001858A external-priority patent/KR100957798B1/en
Application filed by LG Electronics Inc filed Critical LG Electronics Inc
Publication of CN1707675A publication Critical patent/CN1707675A/en
Application granted granted Critical
Publication of CN1707675B publication Critical patent/CN1707675B/en
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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/0021—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier
    • G11B20/00217—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source
    • G11B20/00253—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source wherein the key is stored on the record carrier
    • G11B20/00398—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source wherein the key is stored on the record carrier the key being stored in sync patterns
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/0021—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier
    • G11B20/00217—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source
    • G11B20/00253—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source wherein the key is stored on the record carrier
    • G11B20/00405—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source wherein the key is stored on the record carrier the key being stored by varying characteristics of the recording track, e.g. by altering the track pitch or by modulating the wobble track
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/0021—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier
    • G11B20/00485—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier characterised by a specific kind of data which is encrypted and recorded on and/or reproduced from the record carrier
    • G11B20/00492—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier characterised by a specific kind of data which is encrypted and recorded on and/or reproduced from the record carrier wherein content or user data is encrypted
    • G11B20/00507—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier characterised by a specific kind of data which is encrypted and recorded on and/or reproduced from the record carrier wherein content or user data is encrypted wherein consecutive physical data units of the record carrier are encrypted with separate encryption keys, e.g. the key changes on a cluster or sector basis
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10527—Audio or video recording; Data buffering arrangements
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
    • G11B20/1217—Formatting, e.g. arrangement of data block or words on the record carriers on discs
    • G11B20/1252—Formatting, e.g. arrangement of data block or words on the record carriers on discs for discontinuous data, e.g. digital information signals, computer programme data
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2537—Optical discs
    • G11B2220/2541—Blu-ray discs; Blue laser DVR discs

Abstract

A recording medium, such as a high-density and/or read-only recording medium including a data area including at least two data sections and a linking area to link neighboring data sections, the linking area including scrambled user data produced by scrambling user data with a scrambling key, and to methods and apparatuses for forming, recording, and reproducing the recording medium.

Description

Form the method for recording medium and the equipment and the method for reproduction data
The application is that the application number submitted on March 5th, 2004 is that 03800997.8 (international application no is PCT/KR03/01096, international filing date is on June 4th, 2003), denomination of invention is divided an application for " structure of the link area that forms on high-density read-only recording medium and manufacturing/reproducting method thereof and equipment ".
Technical field
The present invention relates to the enciphered data of the link area of recording medium.
Background technology
Optical disc types recording medium such as compact disk (CD) can permanent storage high-quality digital audio data, make that this medium is very popular.Developed the recording medium of digital versatile disc (being referred to as " DVD " from now on) as a kind of new optical disc types.DVD can store the data more much more than CD, thereby, can on DVD, store higher-quality moving image or voice data, this makes DVD be widely used.At least three kinds of DVD types are arranged now, be used for read-only DVD-ROM, be used for the DVD-R of write-once, and be used for rewritable DVD-RAM or DVD-R/W.
Recently, introduced another re-writable recording medium that is called as BD-RE (blu-ray disc rewritable) bigger than DVD on memory capacity.
As shown in Figure 1a, the CD-RW such as BD-RE comprises such as clamp zone 1 transition region 2, burst cut-out district (BCA) 3, introducing zone 4, data tape, and the zone of drawing zone 5.
Clamp zone 1 is by the central area of the steady arm of compact disk equipment location, with the CD of fixing rotation, and transition region 2 is in clamp zone 1 and comprises zone between the information area of introducing zone 4 and data area.And BCA3 is used as and finishes after the CD manufacture process interpolation information to CD.Introducing zone 4 is zones of required important information in the optical disc replay, draws the zone that zone 5 provides the CD end signal simultaneously.
To introduce zone 4 and be subdivided into some zones, comprise first protected location 1, permanent information and control (PIC) district, second protected location, 2, the second information, OPC, reserved area, and the first information 1.
1 zone, first protected location is used to prevent that BCA3 from rewriteeing the protection zone in PIC zone; this PIC zone is wherein to be stored in zone in the groove of record in advance about the general information of CD and multiple out of Memory; zone, second protected location 2 usefulness act on the buffer area that is transformed into rewritable area from the zone of writing down in advance; and first and second information areas are used for storing the customizing messages about CD or application; for example, control information.
Fig. 1 b and 1c show exemplary RUB (recording unit block).Shown in Fig. 1 b, by importing (run-in), physical cluster derives (run-out) and protected location zone and forms corresponding to the single RUB of single ECC (error correcting code) piece.Shown in Fig. 1 c, if create a lot of RUB, promptly a time; continuous RUB stores real-time input data, for example, and the A/V data; then quantity as required repeat to import, the setting of physics and derivation, and form zone, protected location " Gurar_3 " at the end of.
Shown in Fig. 2 a, this Lead-In Area can comprise 1100 channel bit protected locations " Guard_1 " and 1660 channel bit preambles (preamble) " PrA ".Repeat the head that write protection district " Guard_1 " indicates RUB, and first synchrodata " Sync_1 " and second synchrodata " Sync_2 " of 30 channel bit write preamble " PrA " for 55 times with 20 channel bit patterns (bitpattern).Each synchrodata is made up of 24 bit synchronous main bodys and 6 bit synchronous ID.The first and second data synchronization ID be respectively " 000100 " (FS4) and " 010000 " (FS6).
Shown in Fig. 2 b, this derivation is by 540 channel bit protected locations " Guard_2 " and comprise that back (post-amble) " PoA " synchronously of 564 channel bit of the 3rd synchrodata " Sync_3 " forms.The 3rd synchrodata also comprises 24 bit synchronous main bodys and 6 bit synchronous ID.The synchronous ID of the 3rd synchrodata be " 000001 " (FS0).
Create protected location " Guard_2 " and prevent overlapping between data that formerly write down and the new data that will be recorded.And it has the zone that 27 times of 20 channel bit patterns repeat to indicate precedence record, that is, and and the ending of the RUB that has just write down.
User data write in the physical cluster and by signal processor it is returned to initial data, this processor uses and writes on the synchronous clock of synchrodata in the importing.
Fig. 1 d shows the record format of the physical cluster of BD-RE, has wherein write down 31 record frames (frame #0-#30).Shown in Fig. 1 d, 7 frame synchronization (FS#0 is to #6) that differ from one another that will be used for BD-RE write 31 record frames in proper order with uniqueness.
Fig. 1 e shows the type and the pattern of the frame synchronization that will be written into physical cluster.Shown in Fig. 1 e, use 7 frame synchronization altogether, and each frame synchronization is made up of with 6 bits different sync id pattern in 7 frame synchronization 24 bit synchronous main bodys.
Having physical address information (for example, address location number (AUN)) corresponding to each RUB of aforesaid single ECC piece makes and can random access writes on any RUB on the BD-RE.After physical address information and audio/video (A/V) data being modulated together and encode, physical address information is write in the physical cluster of RUB.And AUN derives from the physical sector number (PSN) that does not in fact write on the BD-RE.
Write-once and CD-RW (DVD-R ,-RW ,-RAM ,+R in+RW) the situation, before the data of discontinuous record precedence record and new data, formerly creates linking frames after Ji Lu the zone.But,, do not need any linking frames to link two data parts such as the read-only optical disc of DVD-ROM and CD-Video because it comprises fully the data of record.
This can rewrite and read-only optical disc between difference require general Disc player, drive such as DVD player and DVD-ROM and be equipped with other hardware and/or software to reset two types CD.
Compact disk equipment that can the recoding/reproduction compact disc rocordable also must be equipped other hardware and/or software reset read-only optical disc and compact disc rocordable.
Simultaneously, the standard of high-density read-only recording medium, promptly so-called " BD-ROM " also with the standard of BD-RE together just under discussion.If the physical format of the physical format of BD-ROM and BD-RE is identical, then Disc player can be used identical reproduction algorithm to two kind of recording medium.In addition, need them to be distinguished from each other, and have compatible form, this just needs to coordinate these situations about opposing each other.But, also do not provide suitable coordination solution.
Summary of the invention
According to an aspect of the present invention, relate to a kind of method that forms recording medium, it comprises:
With the encryption keys user data; With
The user data of encrypting is write in the link area, to be linked at the adjacent data division of the data field on the described recording medium.
According to another aspect of the present invention, relate to a kind of method from the recording medium reproducing data, it comprises:
Use comprises the link area of user data of encryption from described recording medium reproducing data, the adjacent data division in this link area link data district.
According to another aspect of the present invention, relate to a kind of method at the recording medium identifying recording layer, it comprises:
Use comprises the link area of user data of encryption at described recording medium identifying recording layer, the adjacent data division in this link area link data district.
According to another aspect of the present invention, relate to a kind of being used for from the equipment of recording medium reproducing data, described equipment comprises:
Optical pickup apparatus is used for writing described recording medium from described recording medium sense data or with data;
Control module, the data that are configured to control described optical pickup apparatus are read or are write, and also are configured to discern link area and control from described recording medium reproducing data,
The adjacent data division in wherein said link area link data district, and comprise the user data of encryption.
In the exemplary embodiment, the present invention proposes a kind of recording medium with identical or similar physical record form, such as high density and/or read-only recording medium, it comprises the reproduction compatibility of link area with improvement and high density and/or re-writable recording medium, and the present invention also proposes to be used to form, to write down and reproduce the equipment and the method for recording medium.
In the exemplary embodiment, the present invention proposes a kind of recording medium that has synchrodata in link area, such as high density and/or read-only recording medium, the bit mode of the synchrodata in link area is different from the synchrodata that writes in the data recorded area, and the present invention also proposes to be used to form, to write down and reproduce the equipment and the method for read-only recording medium.
In the exemplary embodiment, the present invention proposes a kind of recording medium that has physical address and frame synchronization in link area, such as high density and/or read-only recording medium, and the present invention also proposes to be used to form, to write down and reproduce the equipment and the method for read-only recording medium.
In the exemplary embodiment, the present invention proposes a kind of recording medium with the link area that wherein writes enciphered data, such as high density and/or read-only recording medium, and the present invention also proposes to be used to form, to write down and reproduce the equipment and the method for read-only recording medium.
In the exemplary embodiment, the present invention proposes a kind of recording medium that comprises with the link area of identical with master data or similar mode ciphered data that has, such as high density and/or read-only recording medium, and the present invention also proposes to be used to form, to write down and reproduce the equipment and the method for read-only recording medium.
In the exemplary embodiment, the present invention proposes a kind of recording medium with link area of the value ciphered data that comprises that the physical piece that is associated by the Frame that uses in the previous and/or ensuing physical cluster is derived, such as high density and/or read-only recording medium, and the present invention also proposes to be used to form, to write down and reproduce the equipment and the method for read-only recording medium.
In the exemplary embodiment, the present invention proposes a kind of recording medium that has pseudo-data in its link area, and such as high density and/or read-only recording medium, and the present invention also proposes to be used to form, to write down and reproduce the equipment and the method for read-only recording medium.
In the exemplary embodiment, the present invention proposes a kind of recording medium that comprises with the link area of the data of error-recoverable format record that has, such as high density and/or read-only recording medium, and the present invention also proposes to be used to form, to write down and reproduce the equipment and the method for read-only recording medium.
In the exemplary embodiment, the present invention proposes a kind ofly to have at the recording medium corresponding to the link area in the zone of the importing of re-writable recording medium and/or leading-out zone, such as high density and/or read-only recording medium, and the present invention also proposes to be used to form, to write down and reproduce the equipment and the method for read-only recording medium.
In the exemplary embodiment, the present invention proposes a kind of recording medium with link area of the record frame that comprises required size, such as high density and/or read-only recording medium, and the present invention also proposes to be used to form, to write down and reproduce the equipment and the method for read-only recording medium.
In the exemplary embodiment, the present invention proposes a kind of recording medium that writes on the useful information in the record frame that has, and such as high density and/or read-only recording medium, and the present invention also proposes to be used to form, to write down and reproduce the equipment and the method for read-only recording medium.
In the exemplary embodiment, the present invention proposes a kind of recording medium with the link area between the data division of record, such as high density and/or read-only recording medium, wherein each link area comprises at least one synchronizing signal of indicating link area, and the present invention also proposes to be used to form, to write down and reproduce the equipment and the method for read-only recording medium.
In the exemplary embodiment, the present invention proposes a kind of recording medium that writes on the synchronizing signal in the link area that has, such as high density and/or read-only recording medium, synchronizing signal in this link area is different from the synchronizing signal that writes in the data division, and the present invention also proposes to be used to form, to write down and reproduce the equipment and the method for read-only recording medium.
In the exemplary embodiment, the present invention proposes a kind ofly to have by the recording medium that writes on the physical address ciphered data before or after the link area, such as high density and/or read-only recording medium, and the present invention also proposes to be used to form, to write down and reproduce the equipment and the method for read-only recording medium.
In the exemplary embodiment, the present invention proposes a kind ofly to have by the recording medium of writing frame synchronization ciphered data therein, such as high density and/or read-only recording medium, and the present invention also proposes to be used to form, to write down and reproduce the equipment and the method for read-only recording medium.
In the exemplary embodiment, a kind of recording medium that has by the value ciphered data that provides is provided in the present invention, and such as high density and/or read-only recording medium, and the present invention also proposes to be used to form, to write down and reproduce the equipment and the method for read-only recording medium.
In the exemplary embodiment, the present invention proposes the recording medium of the pseudo-data that write down in a kind of record frame that has in link area, such as high density and/or read-only recording medium, and the present invention also proposes to be used to form, to write down and reproduce the equipment and the method for read-only recording medium.
In the exemplary embodiment, the present invention proposes a kind of recording of information medium that indication writes on the physical address in the record frame that has, such as high density and/or read-only recording medium, and the present invention also proposes to be used to form, to write down and reproduce the equipment and the method for read-only recording medium.
In the exemplary embodiment, the present invention proposes a kind of recording medium that writes on the user data in the record frame with error correcting code (ECC) piece that has, such as high density and/or read-only recording medium, and the present invention also proposes to be used to form, to write down and reproduce the equipment and the method for read-only recording medium.
In the exemplary embodiment, the present invention proposes a kind ofly to have in the record frame that writes in the link area, with the recording medium of the data handled with the identical or similar mode of the user data in Frame, such as high density and/or read-only recording medium, and the present invention also proposes to be used to form, to write down and reproduce the equipment and the method for read-only recording medium.
In the exemplary embodiment, the present invention proposes a kind ofly to have corresponding to the importing of re-writable recording medium and leading-out zone and wherein write the zone of definition of recording unit block (RUB) and the recording medium of the record frame of the size of definition, such as high density and/or read-only recording medium, and the present invention also proposes to be used to form, to write down and reproduce the equipment and the method for read-only recording medium.
In the exemplary embodiment, the present invention proposes a kind ofly to have corresponding to the importing of re-writable recording medium and leading-out zone and wherein write the zone of definition of RUB and the recording medium of the record frame of the size of definition, such as high density and/or read-only recording medium, the frame synchronization that wherein has unique bit mode is written at least one record frame, and the present invention also proposes to be used to form, to write down and reproduce the equipment and the method for read-only recording medium.
In the exemplary embodiment, the present invention proposes a kind ofly to have corresponding to the importing of re-writable recording medium and leading-out zone and wherein write the zone of definition of RUB and the recording medium of the record frame of the size of definition, such as high density and/or read-only recording medium, the frame synchronization that wherein has unique bit mode is provided at least twice, and the present invention also proposes to be used to form, to write down and reproduce the equipment and the method for read-only recording medium.
In the exemplary embodiment, the present invention proposes a kind ofly to have corresponding to the importing of re-writable recording medium and leading-out zone and wherein write the zone of definition of RUB and the recording medium of the record frame of the size of definition, such as high density and/or read-only recording medium, the frame synchronization that wherein has unique bit mode is written at least one record frame, and the present invention also proposes to be used to form, to write down and reproduce the equipment and the method for read-only recording medium.
In the exemplary embodiment, the present invention proposes a kind of recording medium that comprises the data field of the link area that comprises at least two data parts and link adjacent data part, and this link area comprises the user data by the encryption that produces with the encryption keys user data.
In a further exemplary embodiment, the present invention proposes a kind of method that forms recording medium, and this method comprises with the encryption keys user data with the user data of encrypting and writing in the link area to be linked at the adjacent data division of the data field on the recording medium.
In a further exemplary embodiment, the present invention proposes a kind of method from the recording medium reproducing data, and it comprises the use link area to reproduce data, and this link area comprises the user data of the adjacent data encryption partly in link data district.
In a further exemplary embodiment, the present invention proposes a kind of method at the recording medium identifying recording layer, and it comprises the use link area with record data, and this link area comprises the user data of the adjacent data encryption partly in link data district.
In a further exemplary embodiment, the present invention proposes a kind of equipment from the recording medium reproducing data, and this equipment uses link area to reproduce data, and this link area comprises the user data of the adjacent data encryption partly in link data district.
In a further exemplary embodiment, the present invention proposes a kind of method that is used for recording of encrypted data on recording medium, it comprises the part physical address is written into shift register, encrypted byte is exported in each displacement for shift register, and makes up the byte of each encrypted byte and user data.
In a further exemplary embodiment, the present invention proposes a kind of method that is configured in the linking frames on the recording medium, it comprises with the encryption keys user data, make up the user data of additional data and encryption and the enciphered data of combination is write linking frames to be linked at the adjacent data division of the data field on the recording medium.
Description of drawings
Above-mentioned feature of the present invention and other advantage will more clearly be understood by the detailed description below in conjunction with accompanying drawing.In the accompanying drawings:
Fig. 1 a shows the structure of CD-RW BD-RE (blu-ray disc rewritable);
Fig. 1 b and 1c show the form separately of the recording unit block of BD-RE;
Fig. 1 d shows the structure of the physical cluster of BD-RE;
Fig. 1 e shows the frame synchronization that is used for BD-RE;
Fig. 2 a and 2b show importing and the export area that comprises respectively in the recording unit block of BD-RE;
Fig. 3 a and 3b show according to the importing that forms in the recording unit block of BD-ROM of exemplary embodiment of the present invention and the form separately of export area;
Fig. 4 a shows the form according to the link area in BD-ROM of another exemplary embodiment of the present invention;
Fig. 4 b shows the form according to the link area in BD-ROM of another exemplary embodiment of the present invention;
Fig. 4 c shows the form according to the link area in BD-ROM of another exemplary embodiment of the present invention;
Fig. 4 d shows the form according to the link area in BD-ROM of another exemplary embodiment of the present invention;
Fig. 5 shows the new frame synchronization according to exemplary embodiment definition of the present invention;
The BD-ROM that is linked at that Fig. 6 a shows according to exemplary embodiment of the present invention goes up the link area of the physical cluster that forms and the structure of applicable frame synchronization;
Fig. 6 b shows the frame synchronization that will be used to linking frames according to exemplary embodiment of the present invention;
Fig. 7 a shows according to each linking frames in link area of exemplary embodiment of the present invention and the structure separately of writing frame synchronization therein that illustrates to 7c;
Fig. 7 d is the conversion table that exemplary 17PP modulates;
Fig. 8 is the process flow diagram that reproduces each linking frames according to an exemplary embodiment of the present invention;
Fig. 9 is a simplified block diagram of playing the player of recording medium according to an exemplary embodiment of the present invention;
Figure 10 a shows the mode that according to an exemplary embodiment of the present invention physical address is write in the link area to 10c;
Figure 11 a is the block scheme that an exemplary link frame of creating the linking frames with the input user data shown in Fig. 4 a is constructed circuit;
Figure 11 b is the block scheme that an exemplary link frame of creating the linking frames with the input user data shown in Fig. 4 d is constructed circuit;
Figure 12 a shows the exemplary physical address of distributing in the linking frames shown in Fig. 4 b;
Figure 12 b is an example block diagram, shows the encryption equipment that ciphering user data is advanced the linking frames shown in Figure 12 a;
Figure 13 is an example block diagram, shows the encryption equipment that ciphering user data is advanced the linking frames shown in Fig. 4 c;
Figure 14 a shows wherein with the example user data space of the linking frames of the user data of arbitrary value to 14c;
Figure 15 a shows the embodiment that user data is write the user data space of the linking frames shown in Fig. 4 d with the error-recoverable form of the present invention;
Figure 15 b shows in the embodiment of Figure 15 a the exemplary data recording situation with the ECC form;
Figure 15 c shows in the embodiment of Figure 15 a the small size useful data record case with the ECC form; And
Figure 16 shows the another way that user data is write the user data space of linking frames with the error-recoverable form according to exemplary embodiment of the present invention.
Embodiment
In order to understand the present invention fully, its preferred embodiment is described below with reference to the accompanying drawings.
At first, describe in detail according to the link area of the high-density recording media of exemplary embodiment structure of the present invention and according to exemplary embodiment of the present invention with the related Data recording technique of this link area, that is, data form technology.
Hereinafter, use term " to write ", " record " and " formation " represents identical implication to read-only recording medium such as read-only medium, and the frame that will form in link area is called linking frames or record frame.
(1) structure of link area
Recording medium such as high density and/or read-only recording medium; for example; BD-ROM according to exemplary embodiment structure of the present invention has the physical format of describing with reference to Fig. 1 and 2 that is used for high density, re-writable recording medium, and it is made up of Lead-In Area, physical cluster, leading-out zone and protected location.
Shown in Fig. 3 a, according to the Lead-In Area of exemplary embodiment of the present invention by protected location " Guard_1 " with comprise that the preamble " PrA " of two synchrodatas forms.Each synchrodata comprises 24 bit synchronous main bodys and 6 bit synchronous ID.
Though shown in Fig. 2 a, the synchronous ID of the synchrodata in the preamble of BD-RE is " 000 100 " and " 010 000 ", and according to the preamble of the BD-ROM of exemplary embodiment of the present invention structure comprise two its ID be FS0 (" 000001 ") (Sync_3) and FS6 (" 010 000 ") synchrodata (Sync_2).Synchrodata Sync_3 can be placed on the front of synchrodata Sync_2.
In addition, shown in Fig. 3 b, comprise that according to back " PoA " synchronously in the leading-out zone of the BD-ROM of exemplary embodiment of the present invention structure its ID is FS4 (" 000 100 ") synchrodata (Sync_1).This and BD-RE different are that the synchronous ID that will have FS0 (" 000 001 ") writes BD-RE back synchronously in.
In the situation of BD-RE, shown in Fig. 1 c,, then form a pair of importing and leading-out zone if create two RUB.This comprises that to importing and leading-out zone (corresponding to link area) its record is three synchrodatas of " Sync_1 ", " Sync_2 " and " Sync_3 " in proper order.The record of this BD-ROM is " Sync_3 " in proper order, and " Sync_2 " and " Sync_1 " is with the reversed in order of BD-RE.
Therefore, though the BD-ROM of three structures is similar with BD-RE or identical on the physical record form according to the present invention, it can be distinguished with BD-RE because the different synchrodata in link area writes order.In addition, can determine easily whether current region is the link area of BD-ROM based on the layout of synchrodata.
In the above-described embodiments, this importing, derivation and protected location " Guard_3 " zone may comprise the information that writes down that is similar on the corresponding region of BD-RE.
Another exemplary link zone that is used for BD-ROM is shown in Fig. 4 a.Shown in Fig. 4 a, in the exemplary embodiment of BD-ROM, two linking frames (1932 channel bit) of identical size are formed single link area.On the contrary, in the situation of BD-RE, provide 1104 different in size bits to import and 2760 bit export areas, but also form single link area.
Two link area possibility structures are identical, and each frame is made up of 30 channel bit frame synchronization, 9 byte physical addresss, 114 bytes of user data and 32 byte parities.
The user data of this 114 byte may comprise multiple other information, for example, make be difficult to or can't illegal copies be recorded in content among the BD-ROM, such as the anti-piracy information of film to other medium, perhaps can be used for the control information of servo control operation.
Fig. 4 b shows another exemplary embodiment of the present invention.Link area in this exemplary embodiment is made up of (1932 channel bit) linking frames of two identical sizes, and each frame is made up of 30 channel bit frame synchronization, 9 byte physical addresss, 146 bytes of user data.Compare with Fig. 4 a, the difference of the embodiment of Fig. 4 b is that it does not have parity.
Useful information can be write the user data space of 146 bytes.This useful information can comprise make be difficult to or can't illegal copies be recorded in content among the BD-ROM, such as the anti-piracy information of film to other medium, perhaps be used for the control information of servo control operation.
Fig. 4 c shows another exemplary embodiment of the present invention.Link area in this exemplary embodiment is made up of (1932 channel bit) linking frames of two identical sizes, and each frame is made up of 30 channel bit frame synchronization and 155 bytes of user data.Comparison diagram 4a, the difference of the embodiment of Fig. 4 c is that it does not have physical address and parity.This embodiment is different with Fig. 4 b also, are that it does not have physical address.
Fig. 4 d shows another exemplary embodiment of the present invention.Link area in this exemplary embodiment by 30 channel bit guiding frame synchronization, 3714 channel bit link parts, two 30 channel bit after synchronously, and two be respectively that the repeat pattern of 40 and 20 channel bit is formed.This 3714 channel bit link part can be made up of three linking frames and the pseudo-data of 4 bits.
Though Fig. 4 a shows the exemplary embodiment of link area, any other layout based on said structure that can use those of ordinary skills to know to 4d.
The form of data with the ECC module write in the physical cluster, and seven above-mentioned frame synchronization FS0-FS6 are used in the ECC module usually.
In exemplary embodiment of the present invention, at least one in two linking frames shown in Fig. 4 a-4d used new frame synchronization " FS n ", and they are different on synchronous ID with seven frame synchronization that are used for BD-RE.As shown in Figure 5, the synchronous ID of this new frame synchronization " FS n " be " 100 101 " (FS7), " 101 010 " (FS8), " 010 101 " (FS9), perhaps " 101001 " (FS10).
All four example synchronization candidates satisfy the constraint condition of transition shift, and it is specific for BD-RE, and are not shorter than 2 bits on bit mode.
In the exemplary embodiment of Fig. 4 a, frame synchronization FS0 is write in first linking frames, and frame synchronization " FS n " is write in second linking frames.
The data that write down on BD-ROM must satisfy " forbidding RMTR (moving limited conversion) " constraint condition of 17PP (parity protection) modulation code, and this condition is the data recording standard for the BD-RE definition.
The RMTR constraint condition of forbidding that guarantees the stable detection of RF signal illustrates minimum running length 2T, that is, " 01 " or " 10 " can not repeat continuously above six times.Therefore, preferably use the frame synchronization that in new frame synchronization, has little conversion frequency, that is, " 100 101 " (FS7) or " 101 001 " (FS10), make the successive bits string satisfy constraint condition.To be described in more detail the use of frame synchronization with reference to figure 6a-6b.
First situation shown in Fig. 6 b is the exemplary embodiment of Fig. 3 A and 3B.In this exemplary embodiment, at two 1932 channel bit records of link area record frame, and each record frame is made up of frame synchronization, physical address, user data and parity.Two at least one that write down in the frame comprise the frame synchronization " FS n " of redetermination.
For example, frame synchronization " FS0 " writing first frame synchronization that will have its markers (ID) " 000 001 ", and the new frame synchronization " FS n " that is " 010 101 ", " 101 010 ", " 100101 " or " 101 001 " with its sync id pattern writes in second frame synchronization.
Using its sync id pattern is in the incident of new frame synchronization " FS n " of " 010 101 ", " 101 010 ", " 100 101 " or " 101 001 ", shown in Fig. 6 a, has unencrypted initial data " 00 " at frame synchronization " FS n " 9 byte physical addresss afterwards.This is because the RMTR constraint condition that satisfies for the defined 17PP modulation code of data recording on BD-RE is useful.
For example, if use the new frame synchronization FS7 of sync id pattern with " 100 101 ", and, simultaneously, next bits of user data is " 01 11 01 11 ", and its bit by the modulation of the 17PP modulometer shown in Fig. 7 d is " 010 101 010 101 ", comprises that the bit of the last modulation of sync id pattern is formed " 100 101 010 101 010 101 ", and wherein 2T pattern (one 0 (10) pattern between adjacent two 1) occurs for continuous seven times.
But if user data comprises " 00 " at its head, then above-mentioned instances of user data becomes " 00 01 11 01 11 ", and its 17PP modulation bit string is " 010 100 101 010 101 ".Therefore, the final bit with sync id pattern is formed " 100 101 010 100 101 010101 ", three 2T patterns wherein, and a 3T and four 2T mode continuous occur.
Second situation shown in Fig. 6 b is the exemplary embodiment of Fig. 4 A.In this exemplary embodiment, two 1932 channel bit records of record frame in link area, and each record frame is made up of frame synchronization, physical address, user data and parity.At least one in the frame of two records comprises another in the frame synchronization " FS n " of frame synchronization FS10 (" 101 001 ") and redetermination.
For example, the frame synchronization FS0 that will have its markers " 000 001 " writes first frame synchronization, is that the new frame synchronization FS10 of " 101 001 " writes in second frame synchronization simultaneously with its sync id pattern.
In the incident of using new frame synchronization " FS10 ", the RMTR constraint condition of the defined 17PP modulation code of the data recording on BD-RE is satisfied automatically.Therefore, ensuing physical address need not begin with " 00 ".
For example, if use new frame synchronization " FS10 " with sync id pattern " 101 001 " and, simultaneously, next bits of user data is " 01 11 01 11 ", and its bit by the modulation of the 17PP modulometer shown in Fig. 7 d is " 010 101 010 101 ", the Bit String that then has the last modulation of sync id pattern is formed " 101 001 010 101 010 101 ", one of them 2T, and a 3T and six 2T patterns occur.
The 3rd situation shown in Fig. 6 b is the exemplary embodiment of Fig. 4 B.In this exemplary embodiment, two 1932 channel bit records of record frame in link area, and each frame is made up of frame synchronization, physical address, user data and parity.And two record frames all comprise the frame synchronization " FS n " of redetermination.
For example, among frame synchronization FS7 (" 010 101 "), the FS8 (" 101 010 ") of first and second frame synchronization use redetermination and the FS9 (" 100 101 ").
In the incident of using new frame synchronization FS7, FS8 or FS9, shown in Fig. 6 a, 9 byte physical addresss after frame synchronization FS7, FS8 or FS9 have unencrypted initial data " 00 ".Here it is, as previously mentioned, and to better meet the RMTR constraint condition of the defined 17PP modulation code of data recording on BD-RE.
Under the situation of using new frame synchronization FS7 (" 100 101 "), can satisfy RMTR constraint condition by after frame synchronization, writing user data space with the data that are not " 01 11 01 11 ".
The 4th situation shown in Fig. 6 b is the exemplary embodiment of Fig. 4 C.In this exemplary embodiment, in link area, write down two 1932 channel bit record frames, and each record frame is made up of frame synchronization, physical address, user data and parity.And for example, two record frames all comprise the frame synchronization FS10 (" 101 001 ") of redetermination.
Use new frame synchronization " FS10 " to be used for the incident of two Frames therein, the RMTR constraint condition of the defined 17PP modulation code of the data recording on BD-RE automatically is satisfied.Therefore, the physical address after each frame synchronization need not begin with bit " 00 ".
If as the frame synchronization " FS n " of use redetermination described above different because new frame synchronization and those use in physical cluster, can be very easy to and definite accurately current region whether in link area.
For example, using frame synchronization to make up to determine in the situation of current region, because by writing on " the FS n " in the link area and writing on FS4, FS4 in the 29th to the 31st record frame (record frame #28-#30) in formerly the physical cluster respectively and frame synchronization that FS2 forms makes up and becomes FSn-FS4 or FSn-FS2, obviously be different from the combination of forming by the frame synchronization that writes in the physical cluster, can determine that accurately current region is whether in link area based on frame synchronization combination.
Sum up exemplary embodiments more described above below.
If applied enough constraint condition to will just in time writing on frame synchronization data afterwards, can use any four frame synchronization so.
For example, in the situation after physical address is write on frame synchronization,, can use frame synchronization FS8 and FS9 so if physical address always has the preamble of bit " 00 ".
Even in the situation that does not write physical address, if with specified byte, for example, what did not encrypt " 08h " (0,000 1000) just in time writes on after the frame synchronization, to be placed on after the frame synchronization from the Bit String " 000 100 100 100 " that " 08h " modulated by the 17PP modulation, make that can ignore RMTR constraint condition uses any four new frame synchronization FS7-FS10.
To write in the linking frames such as one frame synchronization among four new frame synchronization FS7-FS10, and among the known frame synchronization FS0-FS6 one is written in other linking frames.New frame synchronization can used in the situation 3 of Fig. 6 and two linking frames shown in the situation 4.
If in linking frames, use at least one new frame synchronization " FS n ", as shown in Figure 9 comprise optical pickup apparatus 11, VDP system 12, and the Disc player of D/A converter 13 can detect when reproducing the data of record from BD-ROM, the current frame that reads is link area or in data division (physical cluster).
In the situation of BD-RE, independent the comprising of 31 record frames during seven different frames are synchronously.But seven frame synchronization are not enough to diacritic definition 31 record frames, and frame synchronization or frame in the feasible record frame formerly are used for identifying current record frame and the frame synchronization in present frame.
In other words, record frame N can be by continuous the discerning of its frame synchronization and formerly record frame N-1, N-2 and/or the frame synchronization among the N-3 synchronously.In other words, though do not detect one or two previous synchronous N-1 and/or N-2, last detected synchronous N-3 can be used to identification record frame N and its synchronously.
For example, suppose that the current record frame is the 7th, that is, record frame #6, shown in Fig. 1 d, its frame synchronization is FS1.
But frame synchronization FS1 also is written among frame #1, #23 and the #24, makes previous detected frame synchronization be used for identifying present frame.Current detection to frame synchronization FS1 and previous detected frame synchronization in frame #5, #4 and #3 respectively or FS4, FS1 and/or FS3 make and can indicate present frame synchronously.
Because the layout of frame synchronization is as described above is used for the identification data frame, can realize using the frame synchronization sequence from previous Frame to the record frame link area of the frame synchronization of redetermination.This will describe in detail to 7c with reference to figure 7a.
Fig. 7 a shows applicable according to an exemplary embodiment of the present invention frame synchronization sequence to 7c.
Fig. 7 a is the example at first situation shown in Fig. 6 a and 6b, and Fig. 7 b and 7c are respectively applied for the FS7-FS7 of the 3rd situation shown in Fig. 6 b and the synchronous right example of FS7-FS8.
In the situation of the frame synchronization of use FS0 shown in Fig. 7 a and FS7, shown in situation (1), frame N, N-1 before having the frame #0 of frame synchronization FS0 and the frame synchronization of N-3 are FS7, FS0 and FS2 in order.This frame #0 is corresponding to first address location of RUB.Shown in situation (2), have frame synchronization FS2, FS4 and FS4 in order at second three frames before frame #0 of going.This frame #0 is corresponding to the intermediate address unit of RUB.Shown in situation (3), three frames before frame #1 have frame synchronization sequence FS0, FS7/FS2 and FS4, make first address location or the temporary location of this frame #1 corresponding to RUB.In addition, shown in situation (4), the frame synchronization of three frames before frame #2 is FS1, FS0 and FS7/FS2 in order, makes first or the temporary location of this frame #2 corresponding to RUB.
Shown in " A " mark situation of Fig. 7 a, corresponding to the frame #0 and the frame synchronization sequence that has identical previous frame according to the frame #31 (first linking frames) of exemplary embodiment of the present invention of the intermediate address unit of RUB.Therefore, will be difficult to detect the beginning of link area, and adopt FS0 and FS7 to will not being suitable solution.
Shown in Fig. 7 b, only use FS7.Shown in the situation among Fig. 7 b (1), the frame synchronization sequence before frame #0 is FS7/FS2, FS7/FS4 and FS2/FS4, and frame #0 is first address location or the temporary location of RUB.Shown in situation (2), the frame synchronization sequence before frame #1 is FS0, FS7/FS2 and FS7/FS4, and frame #1 is first or the temporary location of RUB.In addition, shown in situation (3), the frame synchronization sequence before frame #2 is FS1, FS0 and FS2, and frame #2 also is first or the temporary location of RUB.
But shown in " B " mark situation of Fig. 7 b, first linking frames (frame #31) has identical frame synchronization sequence at frame N with the N-3 place with second linking frames (frame #32) according to an exemplary embodiment of the present invention, and this may have problems in the definition link area.But two linking frames have the frame synchronization FS7 of redetermination, and the situation of this FS7-FS7 will be more prone in the FS0-FS7 situation than Fig. 7 a aspect the detection link area.
Fig. 7 c shows the situation of using FS7 and FS8.Shown in situation (1), the frame synchronization sequence before frame #0 is FS8/FS2, FS7/FS4 and FS2/FS4, and frame #0 is first and the intermediate address unit of RUB.Shown in situation (2), the frame synchronization sequence before frame #1 is FS0, FS8/FS2 and FS7/FS4, and frame #1 is first or the temporary location of RUB.
In addition, shown in situation (3), the frame synchronization sequence before frame #2 is FS1, FS0 and FS7/FS2, and frame #2 also is first and the temporary location of RUB.
Shown in Fig. 7 c, the use of FS7 and FS8 is not presented in the identical previous frame synchronization sequence before the arbitrary frame, that is, the previous frame synchronization sequence before the arbitrary frame is unique, therefore, can not have problems when detecting link area.
Therefore, for the link area of exemplary embodiment structure according to the present invention, using FS7 and FS8 is good select a pair of.In addition, illustrate that frame synchronization FS7 and FS8 satisfy RMTR constraint condition as the front.Though in this exemplary embodiment, select FS7 and FS8 sign link area and/or satisfy RMTR constraint condition, as known to persons of ordinary skill in the art, can use other combination arbitrarily.
Fig. 8 reproduces the process flow diagram of the exemplary embodiment of the method for the recording medium of structure according to an exemplary embodiment of the present.
Comprise the BD-ROM (S81) of the link area of structure according to an exemplary embodiment of the present if be written into, the management information that writes on BD-ROM that at first will be used for reproducing control is read in storer (S82).Introduce in the zone if management information has been write on, it was read by optical pickup apparatus in the initial preparatory stage.Then, under the control of control module, begin to reproduce master data (S83).In the reproduction process, detect frame synchronization (S84).If detect, determine whether detected be synchronous (S85) that writes in the main-data area synchronously.If have optical disc recording/reproducing equipment and detected synchronous the comparing synchronously of storage that reach of the synchronous FS0-FS8 that is stored in wherein, may make this and determine.
If determining detected is (S86) among synchronous (FS0-FS6) that writes in the main-data area synchronously, then continue reproduction.But, if determine detected of not belonging to synchronously in synchronous (FS0-FS6), mean that then it is the synchronous FS7 or the FS8 of redetermination, think that its current location is link area (S87), and determine that afterwards this zone is in first linking frames or in second linking frames (S88).If in first linking frames, then will go out (S89) at the data decryption after its frame synchronization.Otherwise, think that current location is second linking frames, and afterwards will be just in time the data decryption after the frame synchronization of data go out (S90).
Therefore, Disc player comprises optical pickup apparatus 11, VDP system 12 and D/A converter 13 as shown in Figure 9, when being placed on BD-ROM wherein, it can detect first and second linking frames (record frame #k+1, #k+2) physical address among and user data at BD-ROM more accurately.Especially, be used for anti-piracy or servo-controlled Useful Information if user data comprises, Disc player is operated to use Useful Information.
As mentioned above, can by detect and relatively the frame synchronization of redetermination be more prone to and determine that fast optical pickup apparatus current location thereon is in link area or in main-data area.
(2) physical address
In the linking frames structure shown in Fig. 4 a, physical address is write in each the record frame of link area shown in Figure 10 a and have three kinds of situations at least.First situation is that the AUN with the physical cluster #k+1 behind the most close frame writes in two linking frames, and second situation is that AUN with the physical cluster #k before the most close frame writes in two linking frames.
In the 3rd situation, the AUN of the physical cluster #k before the most close first linking frames is write first linking frames and the AUN of the physical cluster #k+1 after the most close second linking frames is write second linking frames.
Will be shown in Figure 11 a by 4 byte addresses, 1 byte keeps and 4 byte parities are formed physical address encode by the RS (9,5,5) that is used for BD-RE and make it have error correction capability.To describe in detail below and make the address have the process of error correction capability.
When being placed on BD-ROM wherein, the Disc player that comprises optical pickup apparatus 11, VDP system 12 and D/A converter 13 as shown in Figure 9 can more accurate detection (write down frame #k+1, #k+2) physical address in and user data in first and second linking frames of BD-ROM.Especially, be used for anti-piracy and servo-controlled useful information if user data comprises, then Disc player is operated to use Useful Information.
In the linking frames structure shown in Fig. 4 d, shown in Figure 10 b physical address being write in each of three record frames of link area has two kinds of situations.The AUN of the physical cluster #k+1 of first situation after with the most close frame writes in three linking frames, and second situation writes on the AUN of the physical cluster #k before the most close frame in three linking frames.
The physical address that to be made up of 4 byte addresses, the reservation of 1 byte and 4 byte parities shown in Figure 11 a makes it have error correction capability by RS (9,5, the 5) coding that is used for BD-RE.To describe in detail below and make physical address have the process of error correction capability.
When being placed on BD-ROM wherein, as shown in Figure 9 comprise optical pickup apparatus 11, the Disc player of VDP system 12 and D/A converter 13 can more accurate detection (write down frame #k+1, #k+2, #k+3) physical address in and user data in three continuous linking frames of BD-ROM.Especially, be used for anti-piracy and servo-controlled useful information if user data comprises, then Disc player uses the operation of Useful Information.
Figure 10 c shows another exemplary embodiment of the present invention, and it writes the record frame with the address.(record frame #k+1 #k+2) comprises the 9 byte physical addresss that wherein comprise 4 byte actual addresses to each linking frames.4 byte actual addresses may have with write on linking frames before or after physical cluster in 16 values that AUN#0-#15 is identical.
Shown in Figure 10 c, the 4 byte actual addresses that write in first linking frames physical cluster before are made up of 27 bit addresses, 4 bit sequence numbers (0000-1111) and 1 bit fixed value " 0 ", wherein its order in physical address of serial number indication.All 27 bit addresses that write in the physical cluster of front have identical value.
Shown in Figure 10 c, another 4 byte actual addresses that write in second linking frames physical cluster afterwards are made up of 27 bit addresses, 4 bit sequence numbers (0000-1111) and 1 bit fixed value " 0 ", wherein its order in physical address of serial number indication.All 27 bit addresses that write the physical cluster back have identical value.
As mentioned above, 4 byte actual addresses of first linking frames comprise and write on the address that is arranged in the physical address before its.For example, shown in Figure 10 c, 4 byte actual addresses of first linking frames have the 16AUN (AUN#15) of the most close 27 bits and the address value of " 11110 ".In this situation, be one that writes in link area rather than the physical cluster in order to indicate physical address, last 1 bit " 0 " that is written in five bits " 11110 " in first linking frames can be replaced by " 1 ".
In addition, 4 byte actual addresses of second linking frames can comprise and write on the address that is arranged in the physical address after its.For example, shown in Figure 10 c, 4 byte actual addresses of second linking frames have an AUN (AUN#15) of the most close 27 bits and the address value of " 00000 ".In this situation, be one that writes in link area rather than the physical cluster in order to indicate physical address, last 1 bit " 0 " that writes in five bits " 00000 " in second linking frames can be replaced by " 1 ".
Last five bits that write on 4 byte actual addresses in first linking frames may be " 00000 ", and last five bits that write in second linking frames may be " 11110 ", although these values only are exemplary.
In addition, as below with reference to Figure 10 c explanation, the address that writes on any physical bunch that is arranged in the physical cluster before or after the link area can be write on first and second linking frames.
(3) encrypt
Figure 11 a is the block scheme that is used for the exemplary link frame structure circuit of the structure shown in Fig. 4 a.Linking frames structure circuit comprises encryption equipment 10 and totalizer 20.Encryption equipment 10 usefulness 9 byte physical addresss are encrypted 114 bytes of user data and are made that its DSV (digital sum value) is approaching zero, and add 9 byte physical addresss before the user data of encrypting.
Totalizer 20 has been added in from the interpolation of encryption equipment 10 address user data back with 32 byte parities, and 20 channel bit frame synchronization are added in the front of having added the address user data.Thereby, constructed the complete record frame that comprises 114 bytes of user data of encrypting with 9 byte physical addresss.
In the encryption of user data, can use the information except 9 byte physical addresss.
Figure 11 b is the block scheme that is used for another exemplary link frame structure circuit of the structure shown in Fig. 4 d.This linking frames structure circuit comprises encryption equipment 10 ' and totalizer 20 '.Encryption equipment 10 ' is 62 bytes of user data, encrypts with 9 byte physical addresss such as anti-piracy information to make its DSV (digital sum value) near zero, and added 9 byte physical addresss before the user data of encrypting.
Totalizer 20 ' has been added to 32 byte parities from the interpolation of encryption equipment 10 ' after the address user data.Therefore, the 103 complete byte records frames that comprise 62 bytes of user data of encrypting have been constructed with 9 byte physical addresss.
In the encryption of user data, can use the out of Memory except 9 byte physical addresss.
Except the linking frames that comprise frame synchronization, 9 byte physical addresss, 114 bytes of user data and 32 byte parities of structure shown in Fig. 4 a, can construct linking frames, shown in Fig. 4 b or 12a, make it have frame synchronization, comprise that 1 byte keeps and the 9 byte physical addresss and the 146 byte station addresss of 4 byte parities.This 146 bytes of user data may be encrypted, and 4 byte actual physical address may be used as encryption key.
In other words, shown in Figure 12 b, the part of 32 bits of 4 byte physical addresss (addend 0-addend 31) is as initially value of being written into of 16 bit shift registers 101 in encrypted circuit.With the initial value of being written into parallel be written into shift register 101 after, an encrypted byte is exported in each bit displacement.
Because User Data Length is 146 bytes in the embodiment of Fig. 9, per 146 displacements are with the parallel shift register 101 that is written into of the part of physical address.The change that make as link area the part address that will be written into.After parallel being written into, producing 146 bytes (S0-S145) of encrypting, and it is carried out XOR successively by XOR gate 102 and follow-up 146 bytes of user data (D0-D145).To write in the linking frames as the 146 follow-up bytes of encrypting in the past.
Except physical address, some repetitions of partial frame synchronous mode or bit " 10 " can come encrypt user data as encryption key.In addition, except writing on the physical address in the linking frames, can use an address in 16 addresses in being included in physical cluster, wherein this physical address is before or after current linking frames.Especially, can in 16 addresses, use an address of the most close current link frame.
The physical address that will write linking frames may be encrypted together with the user data of writing there.
In another exemplary embodiment of the present invention, can physical address not write in the linking frames shown in Fig. 4 c.In this situation, the physical address before or after linking frames can be used as encryption key, that is, and and to initially value of being written into of shift register.Because user data is 155 byte longs in this exemplary embodiment, then per 155 displacements are written into shift register with identical with different physical addresss as initial value.
As shown in figure 13, with the parallel 16 bit shift registers 101 ' that are written into encryption equipment of part 4 byte addresses (addend #0-#31), this encryption equipment also can be applicable to the BD-RE record, and moves past in the journey the output of 155 8 bit encryption bytes (S0-S154) order at the processing bit afterwards.
By XOR gate 102 ' continuous 155 encrypted bytes (S0-S154) and continuous 155 user octets (D0-D154) are carried out XOR together.As a result of, produce the user data (D ' 0-D ' 154) of 155 encryptions, and they are write in the record frame in the link area.
Except physical address, some repetitions of partial frame synchronous mode and bit " 10 " can come encrypt user data as encryption key.
(4) pseudo-data
Guarantee reproduction compatibility with BD-RE although in the link area of BD-ROM, form two record frames, but be not written under the situation of user data space being used for anti-piracy or servo-controlled useful data, shown in Figure 14 a, this user data space can be with any specific value, for example, " 00h " fills.A series of this filling value is called as pseudo-data.
If identical data are filled into whole user data space, then the manufacture process of BD-ROM can be simplified more.In addition, if having identical bit mode, adjacent track will occur crosstalking.Like this, as another exemplary embodiment of pseudo-data, shown in Figure 14 b, in order to reduce the probability of crosstalking, with some values, for example " 00h ", " 01h ", " 10h ", " 11h ", " FFh ", " AAh " etc. write user data space in turn.
In the exemplary embodiment of this pseudo-data recording, the pseudo-data of different value are recorded in the record frame of each linking frames that is distributed among the BD-ROM, and this has reduced the probability of the identical logging mode of between adjacent track formation.Therefore, reduced the probability of crosstalking significantly.
In two the record linking frames of frames, form in the situation about guaranteeing with the reproduction compatibility of BD-RE at BD-ROM, in another exemplary embodiment according to the present invention, user data space may be filled with some different values arbitrarily, for example " 00 ", " 01 ", " 11 ", shown in Figure 14 c, the appearance that they replace.
In the exemplary embodiment of the pseudo-data recording of Figure 14 c, link area has the identical data in their user data, and adjacent link area has different pseudo-data.
In this exemplary embodiment, the probability that forms identical logging mode between adjacent orbit is low-down, therefore, has reduced the probability of crosstalking.The manufacture process of the BD-ROM of this exemplary embodiment is also simpler.
In addition, if a value, for example " 00h " fills whole user data space after encrypting with the physical address that has changed each link area, also can reduce and crosstalk.
After encrypting, fill under the situation of user data space with " 00h ", if " 08h " is placed on each user data space foremost with unencrypted, can ignore any above-mentioned new frame synchronization of RMTR constraint condition use of appointment in the 17PP modulation as described above.
(5) ECC modular structure
If write in the user data space with important information useful, this information channel is encoded guarantees its reliability.RS (62,30,33) and RS (248,216,33) coded system are operable exemplary channel coded systems.Also specify coded system to write in the physical cluster of BD-ROM those as encoded user data.
Figure 15 a shows the record instance of record data in having as the link area of the described structure of Fig. 4 d.Shown in Figure 15 a,, at first 30 byte useful datas are encoded by RS (62,30, the 33) system of creating 32 byte parities in order to record the data of usefulness.
Hereto the operation, the input data by sequential storage in storer to constitute 30 * 309 data modules.When having constituted 30 * 309 data modules, each row of continuous sweep (151).Produce 32 byte parities by RS (62,30,33) coded system in the scanning of row each time, and it is appended to the there.As a result of, constitute 62 byte data series.
Each 62 byte comprise can be encrypted parity.In the situation of encrypting, as previously mentioned, the part physical address can be used as encryption key.
9 byte physical addresss are added in front in 62 bytes that form by said process.This 9 byte physical address may be made up of actual physical address and its parity.For example, 9 byte physical addresss may be made up of 4 byte actual addresses, the reservation of 1 byte and 4 byte parities.
The pseudo-data of 145 bytes are added in 71 bytes that comprise physical address, and, as a result of, add 32 byte parities afterwards by RS (248,216,33) coding.The 145 pseudo-data of removing interpolation produce the 103 byte data unit that will be written in link area.
Next 30 byte useful datas are repeated aforesaid operations produce 103 continuous byte data unit.After forming three unit, after three unit, add 4 dummy bits, and then altogether 2467 bits modulated by 17PP.After 17PP modulation, with 2467 bit expanded to 3714 channel bit.First frame synchronization of 30 channel bit is placed on the front of 3714 bits of modulation, and after the bit mode that repeats of bit mode, the 3 30 channel bit frame synchronization and other 20 channel bit that the 2 30 channel bit frame synchronization, 40 channel bit are repeated appends to the bit of modulation in proper order.3864 channel bit that form are like this write link area.
Under the situation of the aforesaid single link area of the very little not enough filling of useful data, add pseudo-data to useful data segment and form 30 bytes.For example, will write in the situation of 3 byte useful datas at each link area, a byte in three has to form single data cell.Therefore, shown in Figure 15 c, only filled one 309 byte row in 30 * 309 data modules, and other 29 provisional capital is filled with pseudo-data.This means at each row and add the pseudo-data of 29 bytes to 1 byte useful data.Afterwards, using RS (62,30,33) coded system is listed as to each of 30 bytes of having added pseudo-data 32 byte parities is appended to there.
In order to recover to write useful data in the link area, carry out decode procedure, the reverse order of promptly above-mentioned ablation process as in the past.
Form in the situation of single link area at two shown in Fig. 4 b identical frames, shown in Fig. 4 a, the user data space of linking frames may be filled with 114 byte useful datas and 32 byte parities.In the record instance of Fig. 4 a, use and Fig. 4 b or the described diverse ways of 4c guarantee data reliability in chnnel coding.To diverse ways be described with reference to Figure 16.
At first collect the nearly useful data (S1) of 2048 bytes.4 byte EDC (error-detecging code) are appended to the useful data module of forming by 2048 bytes of collecting (S2).2052 bytes that comprise EDC are divided into 18 114 byte data unit (S3).Encrypt first data cell (S4), and add 9 byte physical addresss (S5) in its front.Add the pseudo-data of 93 bytes to comprise physical address 123 byte data unit, and, whereby 32 byte parities are appended to data cell by RS (248,216,33) system coding.93 bytes of removing interpolation produce 155 byte frame data (S6), and afterwards with its 17PP modulation.At last, add the complete linking frames (S7) that 30 above-mentioned channel bit frame synchronization form 1932 channel bit in the front of frame data.
The processing (S4-S7) of order described above is applied to next 114 byte datas of dividing forms another linking frames.Two linking frames that form are like this write link area, as a result of, form the structure shown in Fig. 4 a.
When encrypting each 114 byte data unit with above-mentioned processing, as previously described in encryption, use physical address.Write on first and second linking frames that the identical or different physical address that is arranged in the RUB before or after the link area is used for link area.Under the situation of using different addresses, this first linking frames is used and is write on linking frames address before, and the use of second linking frames writes on linking frames other addresses afterwards.
As previously mentioned, the physical address that be written in each linking frames may be made up of 4 byte actual addresses, the reservation of 1 byte and 4 byte parities.In this situation, 4 byte parities are produced 5 bytes by using RS (9,5,5) channel coded system.
In addition, 4 byte actual addresses are made up of 27 bit addresses and 5 bit addresses identifiers, and this address designator is used for distinguishing the independent physical address in link area.
A pair of " 00000/11110 " or " 00001/11111 " may be used as address designator.In person's (or latter) the situation, " 00000 " (or " 00001 ") is inserted in the physical address in the linking frames before use, simultaneously another linking frames is inserted in " 11110 " (or " 11111 ").
In the above description, described new frame synchronization " FS n ", they are different with synchronous " FS0-FS6 " of Frame in writing on physical cluster, and can be used for linking frames.Use and the situation of the synchronous different new frame synchronization of Frame under, in order to protect the digital content that is recorded on the BD-ROM, will be written in the frame synchronization that the data in the physical cluster are used in the linking frames and encrypt not by illegal copies.
Though the content with this ciphered data that will be recorded on the BD-ROM copies CD-RW to, for example, on the BD-RE, " FS n " can not copy on the BD-RE in the new frame synchronization on the linking frames, and it is not created in the BD-RE recording process yet.In other words, being used for encrypted secret key is unavailable in the process of the content that is reproduced in the copy on the BD-RE, makes that it cannot be decrypted.Therefore, can protect the content on BD-ROM not to be subjected to illegal copies.
Above-mentioned structure according to the link area of high-density read-only recording medium of the present invention guaranteed when being reproduced by Disc player or disc drives, the reproduction compatibility of itself and re-writable recording medium (such as BD-RE).In addition, the structure of this link area make it can be used for Disc player or disc drives come by from rewritable recording medium very fast tell read-only recording medium, if necessary, and carry out suitable operation.In addition, by above-mentioned recording mode, Useful Information can be stored in the link area reliably.
Though described exemplary embodiment of the present invention in conjunction with high density, read-only recording medium, it should be understood by one skilled in the art that, instruction of the present invention also can be applicable to other recording medium, such as recordable, rewritable or once rewritable medium and relative method and apparatus.
Although disclose some specific embodiment of the present invention, should notice that the present invention also may be embodied as other form under the situation that does not break away from its spirit and essential characteristic.Therefore, should think that the present invention is exemplary aspect all and is not restrictive, by the scope of the present invention of additional claim indication, and all variations in claim and equivalent scope and implication all are intended to be contained in wherein.

Claims (19)

1. method that forms recording medium, it comprises:
With the encryption keys user data; With
The user data of encrypting is write in the link area, to be linked at the adjacent data division of the data field on the described recording medium.
2. the method for claim 1, wherein this encryption key is the part of the physical address of physical data part the preceding.
The method of claim 1, wherein this encryption key be after the part of physical address of physical data part.
The method of claim 1, wherein this encryption key be the preceding or after the part of physical address of physical data part.
5. the method for claim 1, wherein this encryption key is the part of the physical address of current physical data part.
6. method from the recording medium reproducing data, it comprises:
Use comprises the link area of user data of encryption from described recording medium reproducing data, the adjacent data division in this link area link data district.
7. method as claimed in claim 6, wherein the user data of this encryption has used the encryption key data that is included in the part of physical data the preceding to encrypt.
8. method as claimed in claim 7, wherein the user data of this encryption has used that to be included in be that encryption key data in the physical address of the part of physical data part is the preceding encrypted.
9. as claim 7 or 8 described methods, wherein this encryption key data is used to decipher the user data of described encryption.
10. method as claimed in claim 9, wherein this use comprises that the link area of the user data of encryption comprises the step of using described encryption key data to decipher the user data of described encryption from the step of described recording medium reproducing data.
11. method as claimed in claim 10, wherein any one of the repetition of physical address, bit mode and a part of frame synchronization mode is used as the user data that encryption key data is deciphered described encryption.
12. the method at the recording medium identifying recording layer, it comprises:
Use comprises the link area of user data of encryption at described recording medium identifying recording layer, the adjacent data division in this link area link data district.
13. method as claimed in claim 12, wherein the user data of this encryption is encrypted by the encryption key in the part that is included in the part of physical data the preceding.
14. method as claimed in claim 12, wherein the user data of this encryption is that encryption key in the physical address of the part of physical data part is the preceding encrypted by being included in.
15. one kind is used for from the equipment of recording medium reproducing data, described equipment comprises:
Optical pickup apparatus is used for writing described recording medium from described recording medium sense data or with data;
Control module, the data that are configured to control described optical pickup apparatus are read or are write, and also are configured to discern link area and control from described recording medium reproducing data,
The adjacent data division in wherein said link area link data district, and comprise the user data of encryption.
16. equipment as claimed in claim 15, it further comprises:
Encryption equipment is configured to receiving subscriber data and encryption key, with the user data that produces described encryption and
Totalizer is configured to by the user data addition of described encryption equipment with additional data and described encryption.
17. equipment as claimed in claim 16, wherein this encryption equipment be used to receive with at the relevant encryption key of preceding data division.
18. equipment as claimed in claim 17,
Wherein use described encryption key to decipher the user data of described encryption.
19. equipment as claimed in claim 18, wherein any one of the repetition of physical address, bit mode and a part of frame synchronization mode is used as the user data that encryption key is deciphered described encryption.
CN2005100747468A 2002-06-05 2003-06-04 Method for forming recording medium and apparatus and methods for reproducing data Expired - Fee Related CN1707675B (en)

Applications Claiming Priority (24)

Application Number Priority Date Filing Date Title
KR1020020031746A KR100896058B1 (en) 2002-06-05 2002-06-05 High density read only optical disc, apparatus and method for recording and reproducing an encoded data on them
KR10-2002-0031746 2002-06-05
KR1020020031746 2002-06-05
KR10-2002-0067956 2002-11-04
KR10-2002-0067955 2002-11-04
KR1020020067955 2002-11-04
KR1020020067956 2002-11-04
KR1020020067956A KR100936711B1 (en) 2002-11-04 2002-11-04 Method for recording additional information of high density read only optical disc and high density read only optical disc therof
KR20020067955 2002-11-04
KR10-2002-0077093 2002-12-05
KR1020020077093A KR100576165B1 (en) 2002-12-05 2002-12-05 Method for recording and reproducing data on linking area of high density read only optical disc and high density read only optical disc therof
KR10-2002-0077094 2002-12-05
KR1020020077093 2002-12-05
KR10-2002-0077094A KR100513333B1 (en) 2002-12-05 2002-12-05 Method for recording and reproducing data on linking area of high density read only optical disc and high density read only optical disc therof
KR1020020077094 2002-12-05
KR1020020079818A KR100576163B1 (en) 2002-12-13 2002-12-13 Method for recording data on linking area of high density read only optical disc and high density read only optical disc therof
KR1020020079819 2002-12-13
KR1020020079818 2002-12-13
KR10-2002-0079819 2002-12-13
KR10-2002-0079818 2002-12-13
KR1020020079819A KR100952952B1 (en) 2002-12-13 2002-12-13 Method for recording data on linking area of high density read only optical disc and high density read only optical disc therof
KR10-2003-0001858 2003-01-11
KR1020030001858A KR100957798B1 (en) 2002-11-04 2003-01-11 Method for recording additional information of high density read only optical disc and high density read only optical disc therof
KR1020030001858 2003-01-11

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