CN101558394A

CN101558394A - Methods, system and mediums for use in protecting content

Info

Publication number: CN101558394A
Application number: CN200780032851.2A
Authority: CN
Inventors: J·泰勒; B·莫瑞利; X·施
Original assignee: Sonic Solutions LLC
Current assignee: Extreme Speed Co ltd
Priority date: 2006-09-06
Filing date: 2007-09-05
Publication date: 2009-10-14
Anticipated expiration: 2027-09-05
Also published as: CN101558394B; TW200830323A

Abstract

The present embodiments provide methods, systems and mediums for use in protecting content. Some embodiments provide methods for use in protecting content that access media content with sectors reserved for error data, search for and identify a reserved sector, access error data, replace at least a portion of the reserved sector in the media content with the error data, and record the media content and the error data onto a medium.

Description

Be used for protecting method, system and the medium of content

Prioity claim

The application is the U.S. Patent application No.11/849 that is filed on September 4th, 2007,898 continuity, and the U.S. Provisional Application No.60/824 that requires on September 6th, 2006 to submit to offered in institute's quoted passage, 748 rights and interests, described document is quoted by a full piece of writing and is contained in this.

Invention field

The present invention generally relates to digital content, relates more specifically to protect digital content.

Background

In nearly decades, the use rapid growth of numerical data also has the trend that continues growth.All dissimilar numerical datas are transmitted, communicate by letter and/or store by various systems, network and medium.

The owner that general numerical data is valuable data and this valuable data or blazer more are ready data are taked protection.Apply protection to digital data and have many modes, comprise encryption, scrambling and other such protection.Yet other or the additional protection to content need.

The general introduction of embodiment

The present invention is usefully by being provided for solving above-mentioned needs and other needs for digital content provides method, equipment, system and the medium of protection.Some embodiment provide the method that is used for protecting content; i.e. visit has the media content of the sector of reserving for misdata; the sector that search and sign are reserved; the access errors data; replace at least a portion reserved sectors in the media content with misdata, and media content and misdata are recorded on the medium.

Equally, some embodiment provide the method for protection content.These methods access media content, in the identification medium with in will be in conjunction with a plurality of positions of misdata, the misdata that will comprise a succession of a plurality of adjacent cells is attached to the position that each identifies, in navigation, define navigation command, this navigation command indication playback reproducer is skipped each of a series of a plurality of adjacent cells of being attached to misdata in the media content in replayed section, and media content, misdata and navigation are recorded on the medium.

Some embodiment provide the method for protection content.Will be in these methods access media content, assessment media content, the identification medium content in conjunction with a plurality of positions of identifier; Be configured to each position is appointed as to revise in conjunction with each place, home position of the position of misdata to comprise the media content that is combined in the predefined identifier in the media content, and passing on the media content of being revised.

Other embodiment provides the method that is used for creating recordable media.These methods are created medium as follows: recordable media is provided, select the sector on the medium, predefined data is written to selected sector is used for the reserved sectors of acceptance error data, produce the mapping of reserving with the sector of acceptance error data, and this mapping is written on the medium with establishment.

Other embodiment provides recordable media.These media comprise: the medium first area that is configured to storing media content; In this first area prerecord have predefined data a plurality of sectors, this predefined data is configured in a plurality of sectors each is appointed as reserved sectors; And the mapped identification position on the medium of reserved sectors.

By reference following detailed description of the present invention and accompanying drawing, will obtain the features and advantages of the present invention are better understood, accompanying drawing illustrates the exemplary embodiment of utilizing the principle of the invention.

The accompanying drawing summary

By below in conjunction with accompanying drawing the present invention more specifically being illustrated, all aspect of the present invention, feature and advantage will become more obvious, in the accompanying drawings:

Fig. 1 illustrates the simplified flow chart of process that is used to protect content according to some embodiment;

Fig. 2 is depicted as the simplified flow chart that the content of media content for example provides the process of protection;

Fig. 3 illustrates the simplified flow chart of realizing, incorporate error data into the instantiation procedure of content according to some;

Fig. 4 illustrates the simplified block diagram of the system that writes content to medium;

Fig. 5 illustrates the simplified flow chart of the process of the control in the system that realizes Fig. 4 according to some embodiment, when writing content to medium;

Fig. 6 illustrates the simplified flow chart of the process that is adopted in response to receiving write order by write driver or write device when writing content to medium;

Fig. 7 illustrates and is used for the definition of one or more identifiers and/or reserved sectors and/or is incorporated into the simplified flow chart of the process of content;

Fig. 8 illustrates for example simplified block diagram of the medium of CD;

Fig. 9 is illustrated in the simplified flow chart of the process of using in manufacturing and/or the distribution medium; And

The simplified flow chart of the process that Figure 10 illustrates and writes content to medium---for example the medium of Fig. 8---.

The respective drawings mark runs through the institute drawings attached face of land and shows corresponding component.It will be understood by those skilled in the art that the component part among the figure illustrates in the mode of simplifying and understand and not necessarily draws in proportion.For example, the size of some component parts is exaggerated to help to promote the understanding to various embodiments of the present invention with respect to other component part among the figure.In addition, useful or be considered as essential common but known component part and often do not drawn in the embodiment of viable commercial, so that can not produce the understanding of obscuring to so a plurality of embodiment of the present invention.

Describe in detail

Some embodiment provide writing down and/or can be recorded to the protection of the content of medium.This protection limits, suppresses and/or stop to duplicate content is unwarranted at least in part.

Fig. 1 illustrates the simplified flow chart of process 120 that is used to protect content according to some embodiment.In step 122, this process is searched or received content, for example can be by the content of multimedia of playback and/or demonstration and/or other this type of digital content.In step 124, assessment content and location one or more identifiers, site and/or reserved sectors or content part in content.Identifier can be any identifier of difference site, sector and/or a content part basically.In step 126, search, reception and/or generation error data or content.In step 130, misdata be embedded into and/or be incorporated into and in step 124 location the immediate content of one or more identifiers and/or replace these identifiers.

Some embodiment are according to many factors and one or many ground repeating step 124,126 and 130, for example number of times and/or other these factors or the factors combine transmitted of the size of the number of the number of identifier, misdata and/or amount, received content and/or amount, content.The image file of part or all of the content that in certain embodiments, misdata is incorporated into and/or embeds and indicates to be written to medium---for example CD---.In step 132, content through revising and/or the image file with misdata are written to or are recorded to computer-readable medium, for example combination of portable storage media (for example digital versatile disc (DVD), compact disk (CD) and/or other portable storage media), flash memory, memory stick or memory card, random-access memory (ram), ROM (read-only memory) (ROM) and/or other these storeies or storer.

Be attached to misdata in the content some protections of duplicating without permission to content and/or medium can be provided.In certain embodiments, misdata will cause content incorrectly duplicates and/or causes detected mistake of the device that is duplicated by execution and/or fatal error, and this will cause carrying out the device that duplicates and stop to duplicate.For example, under some application scenarios, misdata can comprise change or one or more incorrect or bad error correcting code (ECC) data and/or data block are provided, so that modified content comprises bad or wrong ECC data and/or data block.Bad ECC data will make content replication become difficult and/or stop content replication.Other these misdatas can be additionally and/or alternatively are incorporated into content so that the protection to content replication to be provided.

Fig. 2 illustrates according to some embodiment simplified flow chart to the process 220 of the protection of the content of for example media content is provided.In step 222, search and/or received content.In step 224, parsing and/or search content are to locate one or more identifiers and/or reserved location or sector.In step 226, determine in a part, perhaps whether to be positioned with reserved sectors and/or identifier in one section content.When identifier or reserved sectors are identified, enter optional step 230, process 220 determines in this step whether misdata is combined in the content.In certain embodiments, carry out optional step 230 to change misdata in appearance and/or position in revising content, this shows as in some implementations and makes the position randomization of misdata in content.For example, by introducing step 230, process 220 can select some identifiers and/or reserved sectors to incorporate error data into content and/or image file randomly.The variation of misdata position makes that location and/or prediction error data are positioned at medium in content stream and/or the image file, and which has partly increased extra difficulty for the duplicating secure content.

When determining misdata in step 230 when combined, process 220 proceeds to step 232, generates, searches and/or receive misdata there.In step 234, misdata is incorporated into and/or embeds content.In step 236, misdata is recorded to storer or medium.In step 238, the position on sign content stream and/or the medium.Under some application scenarios, the position of misdata is recorded or maintains in impact damper or other temporary storage.In step 240, process determines whether to assess and/or to write more contents.In the time will writing more contents, process turns back to step 224 to continue to resolve content.Perhaps, process proceeds to step 250.

Look back step 226, when not detecting reserved sectors and/or identifier, process proceeds to step 242, and the sector of content or a part are recorded to storer and/or medium there.After step 242, process proceeds to step 240 to have determined whether more contents and wait evaluated and/or to have write.Identical with step 230, when definite misdata will not be incorporated into content, process 220 proceeded to step 244, there with sector deletion or it is recorded to medium from content stream.Under some application scenarios, process proceeds to the one or more position that step 238 is attached in content, the reflection with mark or record and/or is written to the reserved sectors of medium.After step 238, process proceeds to step 240 to have determined whether more contents and wait evaluated and/or to have write.

In step 250, process produces and/or changes a file, file structure, mapping and/or navigation by the position that utilizes sign in step 238.Navigation partly assists playback reproducer to navigate in being written to the content of medium.In step 252, process 220 is incorporated into image file with navigation and/or navigation is recorded on storer or the medium.This makes playback reproducer in partly navigation and/or the mapping on the access medium when containing bag institute in conjunction with the media playback content of misdata, with the playback of content on the coordination medium.In some cases, navigate by the playback reproducer utilization to avoid the access errors data and/or to skip misdata.In certain embodiments, for fear of access errors data in playback, the preceding command array of program chain (PGC) is inserted in the cell link order skipped it with near the unit with bad is positioned at PGC top the time.As additional or select, in the time of near bad is positioned at the PGC tail end, cell command can be added into unit before the bad module unit to skip it.In addition, in some cases,, UOP is placed the NAV bag, thereby forbid near the scanning the misdata for when carrying out forward scan or reverse scan, avoiding misdata.Under some other application scenarios, can add the additional invalid mpeg data of extra random near the error block so that decode or encode again and may on invalid mpeg data, lose efficacy.Under other situation, can in navigation, use the DSV data pattern, for example U.S. Patent application is announced those contents of putting down in writing among the No.2005/0193313, and the document is quoted is contained in this.

In certain embodiments, in visit and/or during received content and content implementation procedure 220 when being written to medium actively.Content partly helps to change in certain embodiments and/or combination or the layout of randomization misdata in content and medium in that content record is incorporated error data into during to medium.Therefore, different medium can comprise the diverse location that different misdatas and/or misdata can be arranged in content and/or medium.Navigation can show as multi-form equally to each medium, for example based on the random arrangement of misdata in content stream and/or medium.

To a certain extent, because those attempt generally can't use the sign where may be in conjunction with the template of misdata without the people who walks around protection and reproducting content under the proper situation of authorizing, so the distribution of misdata can strengthen protecting data.Thereby each people who attempts the duplicating secure content must try hard to content on detailed evaluation medium and the medium to locate misdata exactly before attempting to duplicate.

In certain embodiments, misdata can comprise a succession of a plurality of error data cells, and these error data cells are combined in the program chain (PGC) of video caption collection.Can be among the single PGC in conjunction with a string location or many string locations, a plurality of PGC and/or a plurality of video caption collection can comprise the error data cells of a string or more strings separately simultaneously.As additional, misdata can comprise conversion stage in factual error content (for example bad ECC data) front and/or back.This transformation can provide buffering or buffer zone at face before or after the misdata.For example, misdata can comprise one or more buffered data units in one or more error unit front that contains wrong data, and in some cases, can follow one or more imaginary unit or the buffer cell of buffered data after one or more unit.Buffered data generally comprises can be by playback reproducer visit and/or playback and the content that can not lead to errors in playback.For example, buffer cell can comprise the black frame of one or more video content.Buffer cell and error unit be all as the reference (for example the unit ID of each appointment and object video ID) of content navigation, and navigation is also indicated playback reproducer to skip these unit and/or comprised the sector of unit.These buffer cells with quote the people such as Basile that are contained in this announce that the single error data of putting down in writing among the U.S. Patent application No.2005/0185926 are different, in addition, navigation provides the instruction of skipping misdata rather than does not visit the individual unit with misdata.

By in the error unit front and/or binding buffer unit, back, can limit and/or prevent the mistake of non-expectation in the playback.Some playback reproducers are forward scan video content for example in replayed section, thereby the content of playback is wanted in the high-speed cache expection.As a result, in fact some playback reproducers can order with high-speed cache before skipping misdata from containing of error unit of wrong data from the playback navigation reception.By in the error unit front in conjunction with one or more buffer cells (with respect to the playback of unit), the content of player cache buffer cell, thus make player in time receive skip command to skip misdata (this will indicate player to skip one or more buffer cell and error unit).Since playback reproducer buffer memory the empty data that in playback reproducer, do not make the mistake (for example in black screen video content, the unit one or more static VOBU etc.), playback reproducer can be skipped misdata and not experience mistake.Yet as indicated above and next further specify, unwarranted duplicating will can not be skipped buffer cell or error unit and can lead to errors when the reproducting content.

As introduce above and next further specify, misdata can be arranged in the possible a plurality of positions of content.In addition, in the content in conjunction with the position changeableization (for example random arrangement) of misdata further to protect content at least in part.Equally, when realizing misdata by all unit, the number of the error unit of definition error data and/or the number of buffer cell can change in the same manner.Moreover, but but the number random variation of the number random variation of buffer cell and error unit in some cases.As additional or selection, can change the position of the relative buffer cell of error unit.In general, misdata starts from buffered data and ends at buffered data, wherein contains wrong data locking and/or is distributed on the buffered data.For example, one or more buffer cells are positioned at the place that begins of a succession of misdata, and one or more buffer cell is positioned at ending place of this string misdata.Under some application scenarios, for the number existence restriction of error unit and/or buffer cell.For example, based on some standards and/or playback reproducer, the number of error unit and/or buffer cell is restricted to 255 every PGC in unit.In addition, the randomization of misdata can be included in the static VOBU of the buffering of searching and/or create random number in the buffer cell, create the beginning logical block sequence number (sector number) of random number, this sequence number starts from bad ECC piece, in one or more error unit, create the bad ECC piece of random number, relatively one or more error unit in the buffer cell random position misdata and other these become example and/or become the example combination.The buffered data that is adopted and/or the amount of buffer cell can be depending on many factors, comprise the amount of misdata or total error unit, expection playback reproducer and/or other these factors of accessed content.For example; under some application scenario; buffered data can comprise the misdata of four times of amounts; and the data that can comprise one (1) megabyte in the beginning and ending place of misdata both sides and/or misdata in some cases contain protection aspect wrong data, search and/or the scanning to provide to playback reproducer limiting access in replayed section.

Fig. 3 illustrates the simplified flow chart according to the instantiation procedure that incorporates error data into content 320 of some application scenarios.For example, process 320 can be carried out as at least a portion in the step 232 and/or 234 of the process among Fig. 2 220.In step 322, identify a video caption collection and at this video caption centralised identity PGC.In step 324, sign is incorporated into the number of total unit of the PGC that identifies.This number of unit can be predefined numeral, by external source regulation, that determine at random, based on when precondition and/or content, one or more playback reproducer of expection, the medium that writes content on it or other these Standard Selection.In step 326, determine to be incorporated into the number of the error unit of misdata.Equally, the number of error unit can be predefined, by external source regulation, that determine at random, based on when precondition and/or content, one or more playback reproducer of expection, the medium that writes content on it or other these Standard Selection.In step 330, determine the location of one or more error unit of total counting unit adopted misdata decided at the higher level but not officially announced.In many examples, step 330 be incorporated in the misdata of face before the error unit based at least one buffer cell and often at least one buffer cell followed an error unit this be true and be restricted.

In certain embodiments, the navigation of playback is in conjunction with making playback reproducer skip misdata and/or containing the skip command of the sector of misdata, and it comprises skipping of buffer cell and error unit in some cases.Yet as previously mentioned, some playback devices cache are in the content of the content front of current playback.These playback reproducers can be before receiving skip command the part of one or more buffer cell of high-speed cache, but in case receive skip command and the buffer cell content of this high-speed cache can be abandoned.

In some cases, navigation comprises the low layer navigation command that defines playback sequence.As additional or select, navigation can comprise that the indication playback reproducer skips buffer cell and error unit and/or cell command or the PGC order that links between the unit is provided.These skip command are set up at least a portion of navigation pattern.In normal playback, skip command can comprise unit-cell link order in the PGC command area and/or the unit-cell link order in the cell command district.Navigation can be used as additional or selectively is attached in search information and/or the parameter, for example is used to search for, the video search information of F.F., rewinding etc.For example, when F.F. and/or rewinding, near the scan pattern sign the misdata near the navigation bag of (for example the error unit) is disabled to read and/or the cache misses data for example bad ECC piece in case non-return is put the device trial.

Under many situations, the distribution of misdata in content and/or medium can further provide and/or define a pattern.This pattern can be used in addition identification media and/or the checking medium authenticity.For example, the pattern of misdata can be defined as and as watermark, signature, fingerprint or other identifier that medium and/or content and other medium and/or content are differentiated, this will give further instruction in the back.

Fig. 4 illustrates the simplified block diagram of the system 420 that writes content to medium 422.This system comprises storer or the memory 428 and the communication network 430 of controller 424, write device or driver 426, storing digital content.In the single write device 432 that under some occasions, controller 424, write driver 426, storer 428 and communication network 430 can be attached to and can write content to medium 422---for example compact disc rocordable (for example can write DVD), flash memory and/or other these media---.Storer 428 can be internal storage, external memory storage, flash drive or other these storeies.Communication network 430 can be the system bus of coupled system parts or other these communication networks.Some embodiment further comprise one or more interface 434, and these interface 434 permission systems 420 are connected to communicate by letter with far-end server 440, storer 442 and/or other device with one or more external device (ED) and/or distributed network 436 (for example Local Area Network, wide area network (WAN), satellite network, Intranet, internet etc.).

System 420 can be by utilizing program module the combination of hardware, software and/or hardware and software realize.In some cases, system 420 all or part of can be by computing machine, computer system, server and/or the computer executable instructions that may operate on one or more computing machine with any substantially configuration realize, these computing machines comprise---but being not limited to---uniprocessor or multiprocessor computer system, small-size computer, mainframe computer and personal computer, hand-held computing device, based on microprocessor or programmable consumer electronics etc., each in them operationally is coupled in the one or more devices that are associated.As additional and selection, some functions that the teleprocessing device of link that system can realize in distributed computing environment, and this computing environment has by by one or more communication network---for example communication network 430 and/or distributed communication network 436---is realized.In distributed computing environment, program module, executable program, data, content etc. can be arranged in local memory storage and remote storage.

Storer 428,442 can be that any computer-readable medium and/or media set merge and can comprise volatibility and non-volatile media, removable and one or more kinds in removable medium and/or other storer not substantially.In another example, computer-readable medium can comprise---but being not limited to---RAM, ROM, EEPROM, flash memory or other memory technology, internal hard drive, CD-ROM, DVD or other optical disc memory, tape cassete, tape, magnetic disk memory or other magnetic memory apparatus, and/or can be used to memory contents, executable program and/or other closes any other medium or the combination of media of the information of need.Communication network and/or medium 430,436 can comprise---but being not limited to---computer-readable instruction, data structure, program module in some implementations and/or appear at carrier wave for example or other data in modulated data signal of other transmission mechanism, and comprise any information transmission medium substantially.For example, communication media can comprise cable network for example or the directly wire medium that connects of circuit, for example wireless medium of sound, RF, infrared ray and other wireless medium and/or their combination.

Controller 424 provides the control in the system 420 to and guide write driver 426 that content is written to medium 422 from storer 428,442.Controller can be realized by any processor, dual microprocessors and/or other multiple processor structure, microprocessor, computing machine, server and/or other these control device substantially.In some cases, controller and/or system 420 comprise permission user control and/or mutual user interface 444 (for example keyboard, mouse or other fixed-point apparatus, audio frequency I/O, display and other user interface).Communication network 430 can be one or more communication link and/or can be further interconnected and/or comprise memory bus (having or do not have memory controller), peripheral bus and the types of bus structure of using any local bus in the multiple commercial bus architecture.Interface 434 can be wired and/or wave point and realize that by any substantially communication interface these communication interfaces comprise---but being not limited to---USB (universal serial bus) (USB) interface, IEEE 1394 interfaces, parallel port, serial port, game port, infrared ray (IR) interface and/or other this class interface.

Far end device 440 can be one or more remote server, workstation, router, personal computer, pocket computer, the recreational facilities based on microprocessor, peer and/or other common network node.Communication on the distributed network 436 can be wired and/or wireless (for example radio frequency (RF), Wireless Fidelity (WiFi), bluetooth and/or other wireless technology).

In operation, controller 424 instructs write driver 426 that for example content of content of multimedia is written to medium 422 from local memory 428 and/or long-range memory 442.Along with content writes, controller monitors content and indicates write device change content and/or incorporate error data into media content before being written to medium 422.Write driver or device can be any device that can write content to medium 422 basically, and for example---but being not limited to---can record the DVD unit, can record CD unit and/or other such write device.In certain embodiments, the content that be written to medium 422 is reached system 420 from network 436.In addition, but received content, and this content has will be in conjunction with one or more identifier and/or the reserved sectors of misdata.As additional or selection, can receive the content that will be written to medium 422 from local storage 428.Local storage can be internal storage, external memory drive and/or other these memory stores.For example, storer 428 can comprise the optical storage that is used to hold type portable storage medium, and content can be copied to type portable storage medium 422 from first type portable storage medium.In some cases, when reproducting content, controller 424 is for example searched in order to content is made the authority of duplicating by access server 440.

Fig. 5 illustrates the simplified flow chart of realizing the process 520 of the control in Fig. 4 system 420 according to some embodiment, when writing content to medium 422.In step 522, controller is resolved or is instructed as the resolver of selecting and resolve media content.As additional or selection, in certain embodiments, content is not shielded before parsing.For example, the addressable remote server 440 of controller to be searching encryption key or other authority, thereby allows the visit of content and duplicate, and uses key and/or other authority to visit and resolve content.In step 524, the part of chosen content or a sector.In step 526, whether the content of determining the sector comprises identifier or is not defined as the reserved sectors of content.When a part of assessing content or sector, determine whether one or more bit or a succession of bit equal the predefine pattern.As mentioned above, identifier can be any distinctive mark basically.In certain embodiments, predefined a succession of bit or Globally Unique Identifier (GUID) can be included in the sector, being reserved sectors with sector mark.For example, controller can determine whether the sector comprises predefine GUID.

When controller is discerned this sector and is reserved sectors, enter step 532, determine there whether the sector is selected to and comprise misdata.This selection can be to select at random based on the GUID or the pattern of sign, can plant this class of predefine pattern or other based on one or more and select.By changing the selection to the sector, for example the change of misdata position makes and describes where become difficulty more and supplementary protection to content is provided of misdata.Be selected as comprising that in the sector process enters step 534 under those situations of misdata, its middle controller indication write driver 426 incorporates error data into content stream.Perhaps, entering step 536 also writes according to original state merely or deletes from content stream.In certain embodiments,

step

534 and 536 is sent write order through changing or different command to write driver or install 426 and realize by controller 424, with the various write operations of definite implementation according to step 532.After

step

534 and 536, process proceeds to step 542.In step 542, determine whether to resolve and/or to assess more contents.When do not exist more in perhaps during the sector, process stops.Perhaps, process turns back to step 522 to continue to resolve and assess content stream.

Refer back to step 526, when definite one or more bit or a succession of bit were not equal to the predefine pattern, process 520 entered step 540.In step 540, write the sector from content stream with remaining unchanged.In certain embodiments, step 540 and controller similar to step 536 sends write order (for example WRITE10 order).Can be used for step 534 through the write order of changing or revise, write driver or device can differentiate itself and other write order and realize exactly writing of misdata.As selection or additional, some embodiment send the write order with data pattern, and this data pattern makes some write devices produce misdatas.In some cases, data pattern is usually can not received by write device and write device is made mistakes and write the pattern that contains wrong data.The use of this data pattern in write order, for example can by some possibly can't discern indication write error data particular command and/or can't be in conjunction with being utilized with the old write device that utilizes write order through revising through revising firmware.After step 540, process proceeds to step 542 to determine whether assessing more data.

As previously mentioned, identifier can comprise that the predefine pattern that can discern bit or byte or character string, Globally Unique Identifier (GUID) maybe can be other this class identifier of reserved sectors with sector mark.In certain embodiments, with GUID a succession of bit repeats once or more times with fill up with sector mark for wherein will in conjunction with and/or embed the sector of the reserved sectors of misdata.For example, GUID can be the predefine value, and such as " the 4D 36 E9 65 E3 25 11 CE BF C1 08 00 2B E1 03 18 " that write with hexadecimal format, it is identified as the misdirection data with combined identifier.In another example, some embodiment can be changed to GUID or other pattern of predefine 128 bits that are repeated till the sector is filled up by 2048 byte datas with the sector and indicate reserved sectors.Comprise at content stream under the situation of image file of sector, when whether being reserved sectors, can ignore the copyright and district management information (CPRMAI) header of 6 bytes in definite this sector with 2054 bytes.

Incorporate error data into the content that will be written to and/or just be written to medium 422 and be in certain embodiments by give notice write driver or install 426 and realize of controller 424 in conjunction with the write order of misdata.According to some embodiment, write order can be to write (10) and/or write (12) small computer system interface (SCSI) order through what revise.Following table 1 has defined an example writing (10) command descriptor block (CDB) structure, and this structure can instruct write driver 426 initialization contents writing to medium.

Table 1-writes feature description

In general, memory storage is made of a plurality of logical blocks, and these logical blocks generally come index by project LBA (Logical Block Addressing) (LBA) and other parameter.Typical LBA equals 512 store bytes, and for writing (10) and writing (12), generally comprises the LBA address of 32 bits.In many systems, for example the device of each on SCSI bus is assigned at least one logical unit number (LUN).Simple device can have a LUN, can have a plurality of LUN than complicated apparatus.Note reserving " 1 " bit in " 1 " byte, and generally write (10) and/or write (12) order with the transmission of " 0 " value.

Table 2 and table 3 illustrate respectively through what revise and write (10) and write (12) CDB through what revise.Write order through revising be used in certain embodiments the initialization misdata combination and/or the example that writes.

The write feature description of table 2-through revising

The write feature description of table 3-through revising

Notice that " 1 " bit write in (10) and " 1 " byte of writing (12) through revising through revising is defined as bad ECC (BE) indication bit.When the BE parameter is changed to first value, (for example being changed to " 0 " value), writing (10) or indicate writing (10) or writing (12) of write driver 426 operative norms effectively through write (12) revised through what revise.Perhaps, when the BE parameter for example is changed to " 1 ", writes (10) and/or write (12) order indication write driver in the LBA of regulation insertion and/or misregistration data, for example improper or bad ECC data through what revise.Transmission length can identify amount and the number of creating and/or being combined in the data block of the misdata in the content.In some cases, write (10) and/or write the data input of (12) ordering and be left in the basket.

In certain embodiments, also revise write driver or install 426 and/or the firmware of write driver incorporate error data into content to detect the BE bit and to determine when.For example, write driver or install 426 application programming interface (API) and can be modified in certain embodiments to detect and write (10) and/or write (12) order through what revise, and carry out the desired function of writing exactly.In addition, in some application scenarios, controller 424 can be inquired or whether definite write driver and/or device can detect exactly through what revise and write (10) and/or write (12) order and/or whether can incorporate error data into the content stream that is written to medium.In some cases, whether write driver 426 has had in conjunction with misdata in response to inquiry or indication write driver and/or has accurately explained and realize writing (10) and/or writing GET CONFIGURATION (the obtaining configuration) order of the ability of (12) order through what revise.

Table 4 is write device response inquiry or GET CONFIGURATION order and the misdata sent can write an example of feature descriptor.

Table 4-writes feature description

The existence indication driver that misdata can write feature can for example write down and/or be attached to medium according to the misdata standard with misdata.Feature code may be defined as descriptor is designated the misdata feature descriptor, for example feature code can be arranged to the FF54h that writes with hexadecimal format." write " ability that parameter can be used to identify write driver write error data.

For example, (for example be changed to " 0 ") when write parameters is changed to first value, then the misdata write capability is unavailable for write driver.Perhaps, (for example be changed to " 1 ") when write parameters is changed to second value, driver requires to carry out the ability that misdata writes.Can be used as and add or selectively other parameter is included in the descriptor.For example, can comprise version field (for example being changed to the 0h that is write as with hexadecimal format).Persistent bit (for example being changed to zero) can be set, can change its current state to indicate this feature.Current bit, when for example being changed to " 0 ", it is sluggish indicating this feature current, and with the interdependent data of this feature may be invalid, and when for example being changed to " 1 ", can indicate that this feature is current to be enlivened, and effective with the interdependent data of this feature.For example, when current field was changed to " 0 ", the disc that disc or current installation be not installed do not support comprising of misdata or inserts, and when current field is changed to " 1 ", disc was installed and can uses misdata on this medium.Some examples comprise additional length field, it can be changed to the 04h that sexadecimal number is for example write as.

Fig. 6 illustrates the simplified flow chart of the process 620 that write driver or write device 426 adopt in response to receiving write order when writing content to medium 422.In step 622, receive write order.Typically, write order is sent by controller 424.In step 624, determine whether write order comprises the instruction in conjunction with misdata.In certain embodiments, step 624 comprises that determining whether write order is included in through what revise writes (10) order, the bad ECC bit that is changed to predefine value (for example BE is changed to " 1 ") in (12) order or other order of writing through revising.When write order does not comprise in conjunction with the instruction of misdata constantly, enter step 626, wherein the data based on the write order sign are written to medium.

When write order comprises instruction in conjunction with misdata, enter step 630, search and/or produce misdata there.In step 632, misdata is recorded to medium.In certain embodiments, step 630 and 632 can and be made single step, produces misdata there in being recorded to the process of medium, as being described further hereinafter.In step 634, the position of misdata in medium and/or content is identified, record or buffer memory.In some application scenarios, can in producing the playback navigation of using by playback reproducer, utilize the position of misdata.

The performance of write device and/or expection playback reproducer can limit and how incorporate error data into content and/or image file and where it is combined in content and/or the image file.For example, in some cases and/or for some write devices 426, misdata is generated as a series of consecutive data block, for example three (3) individual or more a plurality of sequential cells or bad ECC data, and this is equivalent to for example the 0x30 sector of medium (for example according to the DVD form).What this made that some write devices stop content effectively writes, begins writing of misdata, with stop to write and restart to write content and (for example in first unit, stopping to write content of misdata, write error data on second unit, and stop in Unit the 3rd the write error data to and begin to write content once more).Content writes stops and beginning for example can realizing in some write devices that can work under grouping writes pattern.Some embodiment realize the multistage ablation process, write content there during writing for the first time, and for example override by the part that the phase one is write or skips and during writing for the second time the write error data.In addition, under some application scenarios, alignment errors data on the ECC border for example.Yet, may not need continuous error block and/or borderline alignment in some cases and/or in some write devices.As additional or select, some write devices are also sending the isochronous cache order and/or sending the isochronous cache order the write error data after before the write error data, to obtain transformation more accurately between content and the write error data writing.

Playback navigation can indicate playback reproducer to walk around or skip misdata during playback.So, can not tape error content on the ground playback medium.Yet during content on attempting replicating medium, many reproduction processes are not analyzed content and/or are utilized navigation.Therefore, these reproduction processes of attempting reproducting content and misdata (for example bad ECC data) produce and stop the mistake of duplicating, and in a single day content is write in response to misdata just begin deterioration, and/or cause attempting to forbid or hinder other influence of duplicating.

The combination of misdata and content limits and/or avoids mistake, glitch and/or the detected variation of user's energy with writing down further to be embodied as in playback.In certain embodiments, misdata is being skipped based on navigation easily by playback reproducer and/or error information can be incorporated into content with respect to the format positions aligning place of the expection of content and/or content and/or medium.For example, can be in conjunction with misdata before or after a part of content, as hereinafter further specifying.Yet, under other situation and/or in other playback reproducer, misdata can be attached to any substantially position that needs of closing in image file and/or the content stream.

Still with reference to Fig. 6, the step 630 that produces and/or receive misdata can realize in many ways.For example, misdata can produce and be transmitted or searched with combined according to write order by write driver by controller 424 or other device.In some application scenarios, but write driver scrambling or change ECC data and will be incorporated into content as misdata in addition through the ECC of scrambling data.Scrambling can be any scrambling that makes the ECC data no longer valid basically.When content is written to medium, can produce misdata by the modulation that changes content.As additional or select, when utilizing the laser write content, can change laser instrument power and/or intensity, in the write operation process, make and stop and begin, pause in write operation, to produce, form chained block, generation marginarium and/or other these methods.

Fig. 7 illustrates and is used to define the definition of one or more identifiers and/or reserved sectors and/or it is incorporated into the simplified flow chart of the process 720 of content.Identifier and/or reserved sectors are inserted into content with can be in conjunction with at least some of the position of misdata in the definition content.In step 722, visit and/or retrieve content.In some cases, content is in the initial format when recording medium receives, for example video of uncompressed and audio frequency, or other form that is utilized by content developer and/or supplier.

In step 724, the assessment content can and be selected a part of content.In certain embodiments, the transformation of this assessment and selection sign content, the beginning of all parts of for example scene variation, interior perhaps content and/or other these positions in ending, small pause and the content.For example, the assessment of content can comprise the ending that identifies content or beginning, scene or draw in ending, the beginning of content (for example film) or ending, the head of variation, run-out or preview content of frame (I-frame) with feature thank to other these conversion in the beginning of opening and/or the content.In addition, contain wrong data and can be incorporated into zone or the position that generally is not read in the medium.For example, misdata can be incorporated on the disc or be included on other associated media with other data, for example when content is not filled up medium, can incorporate error data into and not write down as yet in the substantial zone, its zone for generally not read in the medium.Perhaps, can will add or the empty word curtain is combined in the content, wherein not accessed, link of these subtitlings or reference.So, these captions generally are not read when playback, perhaps can visit during content replication usually.

In step 726, determine whether identifier or reserved sectors are attached in the content before the selected portion content in the step 724.For example, the determining section ground of carrying out in step 76 makes the placement variation and/or the randomization of the misdata in the content, and the content of a plurality of versions has reserved sectors and/or along the identifier of content insertion diverse location thus.In certain embodiments, in the step 726 about when will in conjunction with reserved sectors or identifier determine can based on select at random, based on the predefine pattern and/or based on for example being used for other factors and other these factors of desired type of playback reproducer of play content.

When before this part during not in conjunction with identifier or reserved sectors, step 720 proceeds to step 738.Perhaps, when will be, enter step 730 and produce identifier in conjunction with identifier or reserved sectors.In some cases, identifier is GUID and/or other discernible bit or byte pattern.For example, identifier can be that repetition is for several times to fill up the GUID of selected content part one or more sector before.In addition, for example one or more blank or black frame or screen combine with content and/or identifier.

In step 732, content is corrected in conjunction with identifier and/or with reserved sectors combination and/or embedding content.Insert identifier and/or reserved sectors, establishment chained block simply in selected content part front in conjunction with comprising, create the edge, create district and/or other these combinations.As mentioned above, the combination of identifier and/or reserved sectors and/or embedded comprising identifier and/or reserved sectors are embedded in part or all the image file of content that expression will be written to the medium of CD for example.

In step 734, this part content and identifier are recorded and/or cushion.For example this part content and identifier are cushioned the part as image file, and in a single day this image file is finished can be communicated to pen recorder and/or be distributed to the long-distance user and be used for pirate recordings.After step 734, process proceeds to step 744.In step 744, process has determined whether that more contents is waited and has been added and/or combination.When not having more contents, process turns back to step 724.Some embodiment also provide the mapping of the position that combines identifier in the media content.Perhaps, process stops and the content (for example media content) through revising can be recorded to medium, convey to other device with pirate recordings and/or be distributed to one or more long-distance user (for example passing through distributed network).For example, finish image file, it comprises the media content through revising that contains identifier and/or reserved sectors.This media image can be subsequently by pirate recordings and/or propagation.

Get back to step 726, when before this part during not in conjunction with identifier or reserved sectors, process 720 proceeds to step 738, and wherein this part content is recorded and/or cushions.In step 740, determine whether identifier or reserved sectors will be incorporated in the content part content of selecting in the step 724 afterwards.In the time of will be in conjunction with identifier or reserved sectors after this part, process 720 proceeds to step 742, and wherein media content is corrected so that identifier and/or reserved sectors are generated and incorporated into the content after the selected content part.After step 742, process proceeds to step 744 and will be added and/or combination to have determined whether more contents.Turn back to step 740, when determining not in conjunction with identifier or reserved sectors, process proceeds to step 744 and is added and/or combination to have determined whether more contents.

Step 720 defines content owner, supplier and/or distributor can be in conjunction with one or more positions of wrong content in the content.Sector and/or identifier based on reserving can incorporate error data into content when writing and/or transmitting content.This makes has being distributed to through authorizing and/or the destination of authentication through revising content of identifier and/or reserved sectors.In addition, under some above-mentioned application scenarios, not necessarily to wrong content be incorporated into content at each identifier and/or reserved sectors place.Can select (for example at random select) one or more identifier and/or reserved sectors and can be with respect to selected one or more reserved sectors and/or identifier in conjunction with misdata.

In certain embodiments, the selection of a part of content is confined to significantly conversion in the content in step 724, scene is interrupted and/or those parts of other special transformation.In some cases, for digital video content (for example film), transformation can be before the beginning part of movie contents, after movie contents ending, before run-out or the preview content, after the run-out content and/or be other these transformations.Yet other application scenario can be combined in reserved sectors and/or identifier in the movie contents, for example at the scene transitions place, drawing in frame (I-frame) other these positions before or in the content.In certain embodiments, the insertion of misdata and/or location can be indicated by the playback reproducer of expection at least in part.Equally, the selection of identifier and/or reserved sectors can be depending on the playback reproducer of expection, the some of them playback reproducer can have limited capability and therefore misdata be constrained to and content playback do not produced the some place that disturbs in these misdatas and carry out combination.

For example author, distributor and/or the wright of the content of video run-out or video film captions can comprise reserved sectors and/or misdata or agllutination are incorporated in the video content, and wherein reserved sectors or misdata can't be by the visits of the menu system in the content.Equally, playback reproducer is not generally visited these parts, because they do not carry out index in menu.As additional or selection, another section or another part content (for example video section) can be inserted image file or content stream, for example be inserted into the centre of medium, this section or this partial content can partly be full of or be full of fully misdata or bad data piece, and wherein this section or this part are not generally directly visited from menu access or by playback reproducer.

As mentioned above, in certain embodiments, the content provider can be incorporated into content stream as identifier with one or more blank frame or black frame, makes it near identifier and/or as the part of the reserved sectors of content.When in conjunction with misdata,, just can utilize identifier, reserved sectors and/or blank screen in case combine misdata.In certain embodiments, reserved sectors of some or all or the data in the reserved sectors are replaced misdata, for example contain wrong ECC data.

In certain embodiments, the misdata of some or all can be bonded in the predefine part of medium.One or more medium part can be made and/or dispose to this medium, but these medium parts can be by preselected to hold misdata, can comprise misdata and/or physics change.Fig. 8 illustrates for example simplification sketch of the medium 820 of CD (as DVD, CD or other this medium).Medium 820 comprises the data division 822 and the control zone 824 that wherein can write content.In Fig. 8, medium 820 is illustrated as has the control zone 824 that is positioned on the medium internal diameter.Yet the control zone can be positioned at any substantially zone, and distribution and/or partition are on medium.In certain embodiments, the control zone is usually can not be by the zone of pen recorder visit.Existing medium have generally can not write access the similar control district.The control zone can comprise one or more menu, parameter, encryption key, authorization message, sequence number and/or other these data.

Data division 822 also comprises one or more predefine zone 826.These zones can be that indication can be incorporated into the identifier in predefine zone 826 in conjunction with misdata and/or with it to part, the sign that it is incorporated into misdata near predefine zone 826, these zones may comprise misdata, can physically change to lead to errors or other these situations and/or their combination.In certain embodiments, one or more predefine zone 826 definables allow medium to be identified and/or are used to verify that medium is to allow for example content replication to be gone into the pattern of data division 822.For example, the signature of the medium that the permission of pattern definition one-tenth can be identified and/or verifies.

Fig. 9 is illustrated in the simplified flow chart of making and/or distributing the process of using in the medium such as CD 820 and/or other medium for example 920.In step 922, one or more part of selection medium or zone are so that it comprises identifier, misdata, and they can physically change and/or comprise others.In some implementations, this selection is to make institute's favored area be randomly dispersed in selection at random on the data division at least 822 of medium.In step 924, produce the mapping of medium.This mapping identifies the position of institute's favored area at least.In step 926, medium is stamped or otherwise forms institute's favored area.Equally, institute's favored area can comprise the identifier that is embossed into institute's favored area, the misdata that is embossed into institute's favored area can be comprised, can during impressing, be changed (for example making these data can't be written to these zones), and/or other these processing institute's favored area can be used to refer to or defined by physics.In some cases, mapping further is stamped on the medium and can be stamped into data field 822 and/or control zone 824.

The medium that produces by process 920 in can be in conjunction with the medium of misdata in conjunction with misdata and/or identifier field.In certain embodiments, the fabricator can impress a medium, and repetitive process 920 has another medium in the selection district of different pattern with generation subsequently.Perhaps, manufacturing can produce many parts of media with identical patterns, and subsequently to other medium repetitive process 920.For example, the fabricator can produce more than first part of medium (for example first 500 DVD), and each part medium has the institute constituency 826 of first pattern.The fabricator can produce second pattern subsequently and impress more than second part of medium (for example second crowd of 500 DVD), and continues to produce the 3rd, the 4th and any amount of substantially pattern in the selection district with variation subsequently.Can adopt multiple pattern to produce medium.In case be distributed, medium is disseminated to different enterprises, and they scatter the medium with identical patterns effectively.

Figure 10 illustrates the simplified flow chart that for example writes content to according to the process 1020 of the medium of the medium 820 of some embodiment.In step 1022, determine whether medium is in driver neutralization/or not for addressable.When the medium inaccessible, in step 1024, produce mistake.Perhaps, enter step 1026, wherein process determines whether medium comprises one or more predefined mistake or bad block.In certain embodiments, the assessment medium is to determine whether mapping exists medium to comprise the indication in predefine zone.As additional or selection, the medium that can assess some or all is to determine whether medium comprises the predefine zone.When medium did not comprise the predefine zone,---for example process 220---execution content was write according to one or more other process.

When medium comprised the predefine zone, process 1020 proceeded to the mapping of step 1030 with access medium.In step 1032, identify one or more predefine zone by mapping and/or assessment medium.In step 1034, visit and/or reception are written to the content of medium.In step 1036, write device for example according to controller indicated begin to write content like that.In certain embodiments, step 1036 comprise resolve content will be to determine whether content comprises wherein in conjunction with one or more identifier and/or the reserved sectors of misdata, for example carry out in the process 220 of Fig. 2 like that.In step 1040, determine whether the predefine zone runs into the content that just is being written to medium.Equally, it is known that the predefine zone generally is based on mapping, and can be estimated before reaching the predefine zone along with content is written to medium.During not running into the writing of predefine when zone as yet, process continues to write content to medium in step 1042.In step 1044, determine whether to write more contents.When there not being more contents to be written into, then process stops.Perhaps, when more contents will be written to medium, process was got back to step 1040.

Turn back to step 1040, predefine when zone when meeting medium, enter step 1046, stop during wherein content writes and skip the predefine zone.Perhaps, misdata can be written to the predefine zone of some or all.In step 1050, process continues to be written in predefine zone content afterwards.Process turns back to step 1044 subsequently will be written to medium to have determined whether more contents.

Some embodiment provide for example anti-content protecting that duplicates without permission.In addition, some realizations allow to produce for example medium of CD, and this medium is difficult to maybe can't be replicated by most clone methods, and for example---but being not limited to---pursued file copy, duplicated and other content replication method by the sector or by bit.The protection that provides in certain embodiments comprise create bad part and/or incorporate error data into content and/or medium on.As a result, can run into mistake when attempting to duplicate, this makes mistake and/or duplicates failure under many situations.

In some implementations, content provider's content that will have one or more identifier or a predefine sector offers media distribution person and/or fabricator.Available any substantially image file of the use of these identifiers and/or form utilize.For example, can use CD dish, DVD dish and/or other these dishes.For example, identifier can be used for Blu-ray disc and HD-DVD dish and/or other form, because these forms generally have image file identical with the DVD image file and the general big file that just has more sectors.Based on these identifiers, write device can use any technology in writing process misdata and/or bad data piece are created on content and/or the medium substantially.In addition, the combination of misdata can be used for other recordable media, is not only CD, for example memory stick, flash memory and any relevant storer basically.

Although described by specific embodiment and the present invention of using disclosing herein thereof, yet those skilled in that art can make various corrections and variation and not break away from the scope that claims are set forth it.

Claims

1. method that is used to protect content comprises:

Visit has the media content of the sector of reserving for misdata;

The sector that search and sign are reserved;

The access errors data;

Replace at least a portion reserved sectors in the described media content with misdata; And

Described media content and described misdata are recorded to medium.

2. the method for claim 1 is characterized in that, also comprises:

Produce the indication playback reproducer and skip the navigation command of described misdata; And

By media content described navigation command is recorded on the medium.

3. method as claimed in claim 2 is characterized in that, described generation navigation command comprises generation unit-cell link order and it is attached in the described navigation command.

4. method as claimed in claim 3 is characterized in that, described generation navigation command comprises the scan pattern sign relative with misdata in the forbidding navigation bag.

5. method as claimed in claim 3, it is characterized in that, described access errors data comprise a plurality of a succession of unit of generation, in wherein said a succession of unit each comprises the buffer cell of random number, so that first unit in each of described a succession of unit and the most last unit be as buffer cell, and at least one error unit is arranged in the buffer cell of this number randomly;

Described search and sign comprise search and identify a plurality of reserved sectors, and select several reserved sectors in described a plurality of sector; And

Described replacement at least a portion reserved sectors comprises with one of a plurality of a succession of unit replaces in the selected reserved sectors each.

6. the method for claim 1, it is characterized in that, described generation misdata comprises and produces error unit and a plurality of buffer cell, and described replacement at least a portion reserved sectors comprises with described error unit or described a plurality of buffer cell and replaces described at least a portion reserved sectors.

7. method as claimed in claim 6, it is characterized in that, the a plurality of buffer cells of described generation comprise the buffer cell that produces random number, randomly described misdata is attached in the buffer cell of described random number, and at least one buffer cell before described error unit and at least one buffer cell after described error unit.

8. the method for claim 1 is characterized in that, described search and sign comprise search and identify a plurality of reserved sectors, and select several reserved sectors in described a plurality of sector; And

Wherein said replacement at least a portion reserved sectors comprises with misdata replaces each selected reserved sectors.

9. method as claimed in claim 8 is characterized in that, a plurality of reserved sectors of described selection comprise several reserved sectors of selecting randomly in described a plurality of sector.

10. method as claimed in claim 8 is characterized in that, also comprises:

Identify the position of selected sector;

According to the authentication of selected reserved sectors generation to medium.

11. a method of protecting content comprises:

The access medium content;

Will be in the identification medium content in conjunction with a plurality of positions of misdata;

The described misdata that will comprise a succession of a plurality of adjacent cells is attached to each of institute home position;

Define navigation command in navigation, described navigation command indication playback reproducer is skipped each in described a succession of a plurality of adjacent cells of the misdata that is incorporated into described media content during playback; And

Described media content, described misdata and navigation are recorded to medium.

12. method as claimed in claim 11 is characterized in that, describedly comprises in conjunction with misdata:

Identify a plurality of buffer cells;

Identify a plurality of error unit;

Determine where described error unit is positioned in a plurality of buffer cells that identified; And

In conjunction with a plurality of buffer cells that equate with the number of the buffer cell that is identified and a plurality of error unit that equate with the number of the error unit that is identified, wherein said error unit is distributed in the buffer cell of described number in described media content.

13. method as claimed in claim 12 is characterized in that, described definition navigation number comprises the scan pattern sign relative with described misdata in definition and combining unit-cell link order and the forbidding navigation bag.

14. method as claimed in claim 11 is characterized in that, also comprises:

The position that is identified in described media content based on described misdata produces the authentication to described media content.

15. method as claimed in claim 11, it is characterized in that, described in media content a plurality of positions of sign comprise the described medium of assessment, on described medium, identify reservation receiving the zone of misdata, and identify near the part institute's identified areas that will be recorded in described medium in the described media portion.

16. method as claimed in claim 11 is characterized in that, also comprises:

A plurality of positions of misregistration data on the identification media; And

Produce authentication based on the position of the misregistration data that identified on the described medium to medium.

17. one kind for media content provides the method for protection, described method comprises:

Access media content;

Assess described media content;

Identifying will be in conjunction with a plurality of position of identifier in the described media content;

Revise at place, each home position comprise that the media content that is combined in the predefined identifier in the media content, described each home position are configured to each position is designated as can be in conjunction with the position of misdata; And

Pass on the media content of being revised.

18. method as claimed in claim 17 is characterized in that, assesses described media content and comprises the position of determining to take place in the described content content transforming; And

Described in media content a plurality of positions of sign comprise and select two or more content transformings through the location.

19. method as claimed in claim 18 is characterized in that, comprises a plurality of positions that selection is randomly identified from the position of determined a plurality of generation content transformings in conjunction with predefined identifier in described media content.

20. a method that is used to create recordable media comprises:

Recordable media is provided;

Select the sector on the medium;

Predefined data is written to selected sector thinks misdata establishment reserved sectors;

Be produced as the mapping of the sector of misdata reservation; And

Described mapping is written to described medium.

21. a recordable media comprises:

First district of medium, it is configured to storing media content;

Prerecord has a plurality of sectors of predefined data in described first district, and described predefined data is configured in described a plurality of sectors each is designated as reserved sectors; And

Mapped identification position on the medium of described reserved sectors.