CN1719423A

CN1719423A - Copyright protection manufacturing method of universal data format (UDF) optical disc

Info

Publication number: CN1719423A
Application number: CN 200510078287
Authority: CN
Inventors: 周赤
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-06-06
Filing date: 2005-06-06
Publication date: 2006-01-11
Anticipated expiration: 2025-06-06
Also published as: CN100359496C

Abstract

The present invention relates to a copyringht protection making method of optical disk containing universal data format (UDF). Its making method includes the following steps: making image file of first generation optical disk, modifying binary code of catalog bit number control and logical block address respectively managing key file binder and file, and utilizing image file to produce finished product optical disk.

Description

The copyright protection manufacturing method of universal data format (UDF) CD

Affiliated technical field

The invention belongs to the intellectual property protection technical measures, be specifically related to contain the anti-method for making of duplicating of the CD of universal data format (UDF).

Background technology

1996 ISO (International Standards Organization) subordinate optical storage techniques association (OSTA) issued generic diskette file system format (Universal Disk Format is abbreviated as UDF), universal data format can be stored the large data file that surpasses 1G, thereby this standard is widely used in the storage of DVD optical disc data.

DVD CD physical arrangement can have single-surface single-layer (DVD-5), single-surface double-layer (DVD-9) to two-sided bilayer (DVD-18), and capacity can be applied to the electronic publishing of film, music class usually up to 17G.Phonotape and videotape DVD is with high sharpness video or the compressed certain data format that is encoded to of audio frequency, is burnt to laser and can writes on the DVD disc; Perhaps the DVD data layout directly is converted to DDP tape pulse signal, makes metal mother by large scale industry stamper mechanism, become the DVD CD after the sticking pressure of injection moulding, DVD-9 adopts latter's production procedure.DVD does not have small-sized CD writer in early days, must big industry make, and cost of manufacture is very high, and audio-visual publishing industry has adopted region code (Region), simulating signal protection system (APS) and content EVAC (Evacuation Network Computer Model) (CSS), and audio-video copyright is protected.Along with DVD burner with can write the DVD memory feature and popularize gradually, the DVD cost of manufacture descends, and copy-right protection methods such as CSS and region code are cracked in succession, and the DVD phonotape and videotape becomes does not have copyright protection.The bootlegger only needs to implement can follow one's bent behind the lossless video stream copy to the vob file simple copy in the video DVD or by the IFO navigational system, or by the transnational publication of Network Transmission, or change ratio of compression with low-quality image Illegal publishing, or (as rm, rmvb, avi) behind tens of collection serial translation data forms be burnt in the DVD CD, original copyright is worth suffers a disastrous decline.Only because of the pirate impact of compressing one of DVD overseas just faces extinction, unauthorized copying causes damage to the whole world and can't add up China's recording and video industry in 2004 short two months.

The inventor is at disclosed Chinese patent ZL02104957.2 (CN1369882A on September 18th, 2002; G11B23/30) a kind of anti-piracy method for making of Video Compact Disc that adds the power information data housing shroud protection image kernel of cutting blocks for printing at the Video Compact Disc afterbody has been proposed; the method can be used for audio class DVD in theory; but the DVD disk format contains the UDF standard; the UDF standard is to carry out the package imprinting; the imprinting of present incompatible multi-region section; the ZL02104957.2 application surface rests on VCD and makes the field, still can not be applied to DVD and make.

In addition, the also known in the industry a kind of technology of CD with software change data class compact disc image files binary code, this technology can make the file of ISO9660 standard optical disc exceed computer documents attribute category, and file does not show in computer operating system.But these ins and outs are open by relevant magazine, and the bootlegger has the multiple approach that cracks, and has lost the meaning of cdrom encryption.The prior technological deficiency of the method is to only limit to the optical data disk of ISO9660 standard (as yellow book, white paper) is encrypted, and is not suitable for the UDF standard, can not prevent to extract video flowing, can't carry out copyright protection to the DVD CD.

Summary of the invention

The purpose of this invention is to provide a kind of universal data format (UDF) CD copyright protection manufacturing method to obtain to have the DVD CD of anti-replication capacity.

The objective of the invention is that copyright protection manufacturing method by a kind of universal data format (UDF) CD realizes, this method comprises following making step:

Do an image file that meets the original disc of dvd standard and make this CD, the above specification CD of DVD-9 is directly produced the DDP tape image file that is output on the industrial stamper machine;

The binary code group that supervisor computer in the image file reads CD with UDF and iso standard addressing is made amendment, and the binary code that is modified comprises critical file folder and the catalogue figure place control routine of file and the LBA (Logical Block Addressing) code of critical file folder in the image file;

Amended image file is carved into CD-enciphering, or is directly output as DDP tape making metal matrix injection moulding production encryption read-only optical disc.

Be in charge of computing machine in the image file and be modified to zero with the critical file folder of UDF standard addressing and/or the catalogue figure place control binary code of critical file.

Be in charge of computing machine in the image file and be modified to the error-logic block address with the binary code of the critical file of iso standard addressing folder LBA (Logical Block Addressing) (LBA).

Have a critical file double-layered quilt sealing in the CD after the encryption at least, computing machine is opened file folder effectively, can't duplicate the data file in this document folder.

The present invention is by revising the binary code of universal data format (UDF) compact disc image files targetedly, and it is destroyed that computing machine reads the addressing approach of CD.The user can be by DVD player and DVD driver normal play to the DVD CD; but can't in computing machine, open the critical file folder in the CD; can't duplicate or be converted to other data layouts to its content; the DVD CD that solves universal data format is prevented duplicating problem, and digital audio-video works copyright is protected.

Embodiment

The present invention will be further described to be made as embodiment with the encryption of a film DVD below, can know the encryption method that other adopt the CD of universal data formats (UDF) according to principle.

Film DVD sheet source contents is the high definition digital image, the MPEG-2 video standard, audio frequency generally adopts Doby AC-3, multichannel, multilingual, multiple captions, compressed coding back is pressed video DVD (DVD-Video) form and is formed the DVD task, all digital image is stored in (DVD-Audio is stored in the Audio_TS file) in " Video_TS " file, does an original disc or a creating a standard DVD task that meets dvd standard earlier and is absolutely necessary.No matter be DVD-Video or DVD-Audio, disk format is ISO9660/UDF according to dvd standard automatically all, and this original disc is made compact disc image files in order to revising.For the DVD-9 of single-surface double-layer, Video TS file has exceeded the memory space that can write the DVD disc greater than 4.7G, then with the imprinting software that CD mirroring can be outputed on the DDP tape, the DVD task is produced one group of DDP mirror image in order to revising.The present invention does not repel other copy-right protection methods; can enable CSS, the region code technology that has been cracked when making original disc; especially CSS (Content Scrambling System) content EVAC (Evacuation Network Computer Model); second step of the present invention will make CSS play a role again, and the effect of utilization integrated protection obviously is better than single method.

DVD player does not have the center processor (CPU) as computing machine, do not possess computational intelligence, broadcast to CD is according to Time Navigation file (* .ifo) video data stream to be reappeared reduction by decoding chip, do not need addressing, the relative audio class DVD of computer addressing algorithm then seems unnecessary, provides the approach of duplicating to the bootlegger on the contrary.The present invention implements protection to audio-video DVD copyright; in fact exactly will protect * .ifo, vob, ubp file in Video_TS file and the file can't not read after not opened or open by computing machine, this destruction to the computer addressing approach does not influence DVD player and the DVD driver is play the reproduction of video flowing.Preceding first step has been made the image file of video DVD, and second step then is that the binary code (ASCII) to this image file is suitably revised.Open the DVD image file with the software that is fit to open mass file, be that various ASCII character are arranged in the visible image file, after being searched for, " Video " can find in relatively-stationary sector, to have some groups " Video_TS ", each component pipe function is had nothing in common with each other, have plenty of and be in charge of the broadcast of player CD, can not revise the code-group of being in charge of broadcast, otherwise will influence normal play.The code-group that also has is to be in charge of computing machine with the reading of UDF standard and iso standard, and these function groups read for the addressing of computing machine that most important but it doesn't matter with playing function, should make amendment.

At the UDF standard, must destroy the approach that reads of computing machine regular file management system, and the distinctive ifo video flowing of protection video DVD navigational system, for reaching this purpose, can realize by the directory tree that damages the DVD file system.For example: the critical file folder in the video DVD is " Video_TS ", folder name is called eight bit character, before Video_TS, there is one group of ASCII character to limit Folder Name figure place length, and controlling the directory tree of whole file, this catalogue length control routine is revised as 00, then file will become the non-file that NULI character shows, computer documents management system and DVD crack and can't find Video_TS.Perhaps, this is modified for is used for file, will cause file to become non-file as a same reason, have the ability to cross file and still can't find file, can't carry out the video flowing copy by the ifo file even crack.The inventor recommends this kind modification is applied to file and file simultaneously; file and file to video DVD apply double shielding; the directory tree of DVD file system does not meet the UDF standard with integral body, and the CSS content EVAC (Evacuation Network Computer Model) that has been cracked is played a role again.

Also need to destroy the addressing approach of iso standard simultaneously in the addressing approach that destroys the UDF standard, prevent to crack with of the extraction of ISO approach to phonotape and videotape.The key of destroying ISO addressing approach is the LBA (Logical Block Addressing) LBA (Logical Block Address) of file, the LBA value of file has determined the logic size of file, LBA value correct with " Video_TS " file, to make computing machine with the addressing generation logic error of iso standard to this document folder, file is shown as non-file in the ISO system that cracks or file can't be opened.

In a word, the modification of image file ASCII character is all carried out at the computer addressing algorithm, destroyed the addressing approach of computing machine CD, can't addressing and playback equipment can normal play be an aim to guarantee computing machine.Through after the modification as above embodiment, have at least a critical file to hold in the CD with complete closed, open behind the CD blank out or opened file folder and form endless loop, even the CD of at all not opening, all files folder and file all can not be discerned by computer management system.Computing machine is according to UDF standard, iso standard or deciphering all can't be read the DVD addressing to the ifo video flowing.

The DVD-9 data Layer has bilayer, and the DDP image file has two, so only need to revise the image file of ground floor.Image file is made suitable modification back preserve this image file.

Amended image file is burnt to write becomes CD on the disc; Or be directly output as the DDP tape, and make metal matrix, CD is produced in injection moulding.This step need not more to speak more bright.

Should be appreciated that, universal data format (UDF) is not the publication that only is applied to audio-video DVD, can be applied to common capacity (650M) optical data disk of software class equally, thus to the various modifications and variations combination of present technique and to the expansion of common capacity data CD, EVD CD and Blu-ray Disc all in the application's scope.

Claims

1: the copyright protection manufacturing method of a kind of universal data format (UDF) CD is characterized in that comprising the steps:

Amended image file is carved into CD-enciphering, or is directly output as DDP tape making metal matrix injection moulding production CD-enciphering.

2: the copyright protection manufacturing method according to the described universal data format CD of claim is characterized in that: be in charge of computing machine in the image file and be modified to zero with the critical file folder of UDF standard addressing and/or the catalogue figure place control binary code of critical file.

3: the copyright protection manufacturing method according to the described universal data format CD of claim is characterized in that: be in charge of computing machine in the image file and be modified to the error-logic block address with the binary code of the critical file of iso standard addressing folder LBA (Logical Block Addressing) (LBA).

4: according to the copyright protection manufacturing method of the described universal data format CD of claim; it is characterized in that: have a critical file double-layered quilt sealing in the CD after the encryption at least; computing machine is opened file folder effectively, can't duplicate the data file in this document folder.