CN105096984B - Image watermarking and encryption method based on optical storage media - Google Patents
Image watermarking and encryption method based on optical storage media Download PDFInfo
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- CN105096984B CN105096984B CN201510399642.8A CN201510399642A CN105096984B CN 105096984 B CN105096984 B CN 105096984B CN 201510399642 A CN201510399642 A CN 201510399642A CN 105096984 B CN105096984 B CN 105096984B
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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
Abstract
The present invention provide it is a kind of based on the image watermarking of optical storage media in encryption method, comprise the following steps：Original document is received, and original document is converted into binary sequence A, binary sequence A corresponds to hole and bank in the physical runlength of optical storage media；Hidden file is received, and the hidden file is converted into binary sequence B；Binary sequence B Yi Zikeng, sub- bank coded system are subjected to coding with the binary sequence A and form a composite coding, son hole is formed so as to be formed at least part hole of the optical storage media physical runlength in sub- bank and at least part bank, and the composite coding hole that imprinting is formed in physical runlength on the optical storage media, bank, sub- bank and son are cheated.
Description
Technical field
The present invention relates to a kind of image watermarking and encryption method, more particularly to a kind of image watermarking based on optical storage media
With encryption method.
Background technology
Existing optical digital disk product is all to convert the information into binary data, and by binary number according to this certain modulate
Mode and two kinds of different physical states of storage medium recorded symbol are corresponding, realize data storage, this kind of storage mode is referred to as two
Value storage.All be two-value storage mode used by current read-only optical disc memory technology, according to the height of reflected light light intensity come
Judge that current corresponding position is " hole "（Pit）Or " bank "（Land）, two states can be recorded in each recording unit
Number, that is, just correspond to 1（bit）Information.User obtains the information of digital light disc recording by decoder.
In today that awareness of safety and privacy aware increasingly improve, the secrecy of information is gradually valued by people, in addition,
During bulk information or data transfer, the identification to information or data source reliability is also very important research class
Topic.All it is generally in the prior art to realize data encryption by using software algorithm, but this mode is in security performance
Hardware encryption not to data is more powerful, and is unable to reach the purpose of image watermarking.
The content of the invention
In summary, it is necessory to provide a kind of simple and safe image watermarking based on optical storage media with adding
Decryption method.
It is a kind of based on the image watermarking of optical storage media in encryption method, comprise the following steps：
Original document is received, and original document is converted into binary sequence A, binary sequence A corresponds to optical storage Jie
Hole and bank in the physical runlength of matter；
Hidden file is received, and the hidden file is converted into binary sequence B；
Binary sequence B Yi Zikeng, sub- bank coded system and the binary sequence A are carried out into coding, and to form one compound
Coding, son is formed in sub- bank and at least part bank so as to be formed at least part hole of the optical storage media physical runlength
Hole, and
By the composite coding on the optical storage media imprinting formed physical runlength in the hole, bank, sub- bank and
Son hole.
Relative to prior art, hidden file is loaded into original by the embodiment of the present invention by Yi Zikeng, sub- bank coded system
In beginning file, it is achieved thereby that hardware encryption and the hiding purpose of data, substantially increase the security of image watermarking, and be somebody's turn to do
Method is simply easily achieved.
Brief description of the drawings
Fig. 1 is the credible CD drive functional module provided in an embodiment of the present invention with image watermarking and encryption function
Block diagram representation.
Fig. 2 is Zi Keng, the schematic diagram of sub- bank coded system that the embodiment of the present invention 1 provides.
Fig. 3 is the offer of the embodiment of the present invention 2 using the credible CD after Zi Keng, sub- bank fgs encoder mode engraving data
Read the waveform diagram of radiofrequency signal.
Main element symbol description
| Credible CD drive | 100 |
| Data transmission unit | 12 |
| Master controller | 14 |
| Embedded controller | 16 |
| Optics head assembly | 18 |
| Data transfer module | 162 |
| Data conversion module | 164 |
| Data encoding module | 166 |
Following embodiment will combine above-mentioned accompanying drawing and further illustrate the present invention.
Embodiment
Image watermarking and encryption method provided by the invention based on optical storage media are described in detail below with reference to accompanying drawing.
The embodiment of the present invention provides a kind of image watermarking and encryption method based on optical storage media, comprises the following steps：
S1, original document is received, and original document is converted into binary sequence A, binary sequence A corresponds to optical storage
Hole and bank in the physical runlength of medium；
S2, hidden file is received, and the hidden file is converted into binary sequence B；
S3, binary sequence B Yi Zikeng, sub- bank coded system are subjected to coding with the binary sequence A and form one
Composite coding, formed so as to be formed at least part hole of the optical storage media physical runlength in sub- bank and at least part bank
Son hole, and
S4, by the composite coding on the optical storage media imprinting formed physical runlength in the hole, bank, sub- bank with
And son hole.
Firstly the need of explanation, in the embodiment of the present invention, due to the binary sequence A and the physics of optical storage media
Hole and bank in the distance of swimming is corresponding, and binary sequence B is corresponding with the Zi Keng in the physical runlength of the optical storage media, sub- bank, because
This, it is follow-up for convenience of describing, part illustrate in can Yi Keng and bank replace binary sequence A（Original document）, Yi Zikeng, sub- bank
To replace binary sequence B（Hidden file）.And during, file stores, it is to be sequentially generated binary sequence A, two enter
Then sequence B processed is correspondingly formed hole, bank, sub- bank, son further according to binary sequence A, binary sequence B on optical storage media
Hole.
The optical storage media can be various data types CD, such as, but not limited to DVD, CD, BD, EVD and
At least one of HDDVD.
In data storage scribing process, the imprinting of a branch of convergence swashs the optical storage media of traditional two-value physical runlength length
The surface of optical storage media is crossed in optical scanning, by modulating the power of laser come record information.The power of laser is at least modulated into
Two kinds of power, one kind can make to leave physics hole on the optical storage media, and another kind can not make to leave on the optical storage media
Physics is cheated.The place for being left physics hole is referred to as cheating（pit）, it is impossible to the place for being left physics hole is referred to as bank
（land）.In reading process, a branch of convergence reads laser along the scanned video disc recording layer in scanning direction during record, is reflected back
Light intensity will be detected by photodetector.The place for having hole can reduce the light intensity of reflection, that is, export photodetector
Read output signal amplitude reduce.Cutting is carried out to the radiofrequency signal that detection is read, you can the length of hole and bank is obtained, so as to obtain
The information of record.
A physical data bits are referred to as a passage or a T, consecutive identical type on optical storage media（Hole or bank）
Physical data bits be a physical runlength.Such as DVD physical runlengths shortest length is 3T, up to 14T, wherein Data Physical
Run length can be the arbitrary value in 3T to 11T, and 14T is data frame frame head.Physical runlength on optical storage media is with the hole
Or the continuous appearance of bank alternating, these are continuously alternately cheated or what bank represented is the initial data being stored on the optical storage media.
Image watermarking described in the embodiment of the present invention and encryption method be principle based on the optical storage media data storage and
Process.
In above-mentioned steps S1, the original document as needs the data text being stored on the optical storage media originally
Part, the original document is externally visible, i.e., anyone may be by such as CD-ROM drive and reads out the original document.The original text
Part can be first converted into the binary sequence A before being stored on the optical storage media, and binary sequence A represents the original
The data message of beginning file.Subsequent optical recordable media can continuously alternate form be burnt at by binary sequence A Yi Keng and bank
On the optical storage media.
In above-mentioned steps S3, the Zi Keng, the coded system of sub- bank refer to two enter each in binary sequence B
Value or partial value Yi Zikeng, sub- bank processed form embodiment.Sub- bank and son hole and the binary system sequence in i.e. described physical runlength
It is corresponding to arrange B, for the follow-up hardware-embodied on the optical storage media of the hidden file.The Zi Keng, the concept of sub- bank are phases
For the hole for representing original document and bank.The sub- bank is arranged in the hole, can decompose original hole, so that
Hole originally is formed on physical runlength length direction continuously replaces short hole, sub- bank and short hole.Similarly, the sub- hole is set
In the bank, can decompose original bank so that original bank formed on physical runlength length direction it is continuously alternately short
Bank, sub- hole and short bank.Similarly, the short bank and short hole are for the original bank residing for themselves and hole
's.That is, original bank and hole due to Zi Keng, sub- bank addition and decompose.Therefore, the Zi Keng, sub- bank coded system are to make
Formed at least part hole of the optical storage media physical runlength in sub- bank and at least part bank and form son hole.Sub- bank, son
Cheat the arrangement mode in the physical runlength and represent the hiding data.
As long as the position that the sub- hole adds in the bank ensure first paragraph of the bank in physical runlength length with
And final stage is the short bank.Similarly, as long as the position that the sub- bank adds in the hole ensures that the hole exists
First paragraph and final stage in physical runlength length are the short hole.
In above-mentioned steps S3, the binary sequence B includes " 1 " and " 0 " two class data bit, and the Zi Keng, sub- bank are compiled
Code mode further comprises：When for " 1 " when, can corresponding to the binary sequence A hole and bank in set sub- bank or son hole, when
For " 0 " when, corresponding to the binary sequence A hole and bank in do not set sub- bank or son hole.Similarly, the Zi Keng, sub- bank
Coded system can also further comprise：When for " 0 " when, can corresponding to the binary sequence A hole and bank in set sub- bank or
Son hole, when for " 1 " when, corresponding to the binary sequence A hole and bank in do not set sub- bank or son hole.
In above-mentioned steps S3, the Zi Keng, sub- bank coded system can further comprise selecting specific physical runlength length
Hole and the sub- bank and Zi Keng are set on the bank, less than the specific physical runlength length hole and be not provided with the bank the sub- bank and
Son hole.It such as may be selected to set sub- bank on hole of the physical runlength length more than or equal to 7T and be more than or equal in physical runlength length
9T of setting on the bank hole.Preferably, add after the Zi Keng and sub- bank and ensure that the length of the short bank and short bank is more than etc.
In 3T.
Further, the quantity of the sub- bank set in some described hole can be one or more, some described bank
The quantity in the son hole of middle setting can be one or more.Preferably, in the embodiment of the present invention, the son that is set in a hole
Bank quantity is 1, and the son hole quantity set in a bank is 1.
Further, the Zi Keng, the length of sub- bank are controlled, makes the reading radiofrequency signal in the hole for including sub- bank not
More than cutting level.The Zi Keng, the length of sub- bank are controlled, makes the reading radiofrequency signal for including sub- hole not less than described
Cutting level.The standard that the cutting level judges when reading data for the hole and bank, the output signal in the hole are less than
The cutting level, the output signal of the bank are more than the cutting level.That is, in the rf signal curve of reading data
In, the cutting level is the threshold value of the difference hole and bank.
By the Zi Keng, sub- bank coded system be determine physical runlength Shang Keng, bank, sub- bank, sub- hole arrangement mode.
The arrangement mode is the composite coding.
In above-mentioned steps S4, according to the composite coding or the hole, bank, sub- bank, sub- hole arrangement mode described
On optical storage media carry out imprinting will the original document and hidden file be recorded on the optical storage media.
During data read-out, laser scanning forms the radiofrequency signal of consecutive variations, passes through light in physical runlength
Decoding chip corresponding to storage medium, you can revert to data of optical disk.When the hidden file is added institute by addition Zi Keng, sub- bank
When stating in initial data, the radiofrequency signal of reading is exported when by the decoding chip, the Zi Keng, the radiofrequency signal of sub- bank
Fluctuation does not meet data encoding rule corresponding to the decoding chip, but radiofrequency signal is not above caused by Zi Keng, sub- bank
Or less than the cutting level, data processing is carried out so as to which system noise can be taken as, so as to which what is finally read is still original
File.And hiding data is needed by specific decryption system, according to image watermarking encryption data rule（The Zi Keng, sub- bank
Coded system）It is decrypted, you can extract the concealed encrypted hidden file.
Referring to Fig. 1, the embodiment of the present invention provides a kind of credible CD drive with image watermarking and encryption function
100, it includes：Data transmission unit 12, master controller 14, embedded controller 16 and optics head assembly 18.
The data transmission unit 12 and the master controller 12 and embedded controller 16 are connected, for by original document
The master controller 14 is transferred to, the hidden file is transferred to the embedded controller 16.The data transmission unit 12
Can be SATA transmission units.
The master controller 14 is used to receiving the original document that the data transmission unit 12 transmits, and by the original document
It is transferred to after being converted into the first imprinting laser switch signal in the embedded controller 16.
Specifically, the master controller 14 mainly can control the imprinting and reading on CD of original document.It is described
The original document can be first converted into the binary sequence A by master controller 14, then again be converted into binary sequence A
The first imprinting laser switch signal.The first imprinting laser switch signal is corresponding binary sequence A light
The hole of checker in disk physical runlength and bank.
The embedded controller 16 is arranged between the master controller 14 and the optics head assembly 18, insertion control
Device 16 further comprises data transfer module 162, data conversion module 164 and data encoding module 166.The data transfer
Module 162 is used to receive the hidden file and the first imprinting laser switch signal.
The data conversion module 164 is used to the hidden file being converted into the second imprinting laser switch signal.Enter one
The hidden file can be first converted into the binary sequence B in advance, then again should by step ground, the data conversion module 164
Binary sequence B is converted into the second imprinting laser switch signal.
The data encoding module 166 is used to believe the first imprinting laser switch signal and the second imprinting laser switch
Number encoded to form one the 3rd imprinting laser switch signal.3rd imprinting laser switch signal passes through the data transfer
Module 162 is transferred to the optics head assembly 18.The coded system that the data encoding module 166 uses is the Zi Keng, son
Bank coded system is loaded into the original document in the form of by the hidden file Yi Zikeng, sub- bank.From the foregoing it will be appreciated that institute
State Zi Keng, sub- bank coded system is to form sub- bank and at least portion at least part hole for make the optical storage media physical runlength
Divide in bank and form son hole.Specific Zi Keng, the above-mentioned by the agency of of sub- bank coded system, will not be repeated here.3rd imprinting
Laser switch signal is embodiment of the composite coding on final laser signal（I.e. described 3rd imprinting laser switch letter
Number it is equal to the composite coding）.
The insertion controller 16 can be that can realize in FPGA, DSP, ARM and single-chip microcomputer of above-mentioned function at least
It is a kind of.The embedded controller 16 can be integrally disposed with the master controller 14.
The optics head assembly 18 receives the 3rd imprinting laser switch signal, and according to the 3rd imprinting laser switch
Signal carries out imprinting on CD and forms the hole, bank, Zi Keng, sub- bank, described original so as to which the hidden file be loaded into
In file, the hidden file hiding on CD is realized, obtains credible CD.
The optics head assembly 18 can be the optics head assembly for being used for imprinting and reading data used in legacy optical drives.Specifically
Ground, the optics head assembly 18 may include laser, object lens and light-sensitive element.The laser is used to produce imprinting and read to believe
Number laser.The object lens are used for hole, the bank information aspect for focusing the laser beam to CD.The light-sensitive element is used for will
The reading laser intensity of reflection is converted into voltage signal.
This is credible, and CD drive 100 can further comprise CD switch storehouse circuit motor and optical disk rotary motor, institute
It is the driving motor that CD storehouse is ejected and sucked to state CD switch storehouse circuit motor.The optical disk rotary motor enters for drive CD
The motor of row rotation.The CD switch storehouse circuit motor and optical disk rotary motor can pass through winding displacement and the master respectively
Controller 14 connects.
Credible CD drive 100 provided in an embodiment of the present invention is equivalent to the master controller and light in existing commercial CD-ROM drive
The insertion controller 16 for being used to load hidden file in the original document is provided between head assembly, so as to obtain
There is image watermarking in the CD drive 100 of encryption function.
This is credible, and the hidden file can be loaded into the original document by CD drive 100, and the loading procedure is not
It can distort the original document, and when the credible CD reads data by conventional commercial CD-ROM drive, be read in the original document
During, the hidden file is taken as noise or redundancy to filter out（The length of the Zi Keng, sub- bank is controlled so that described
For optics head assembly 18 in read output signal, the read output signal will not cross the cutting level, load the hidden file and
The read output signal for being not loaded with the hidden file is crossed the phase of cutting level and will not changed）, so as to common user only
The original document can be obtained, hidden file can not be read by the conventional commercial CD-ROM drive, reach the purpose of image watermarking.Separately
Outside, user, can be using to be tested to read with the corresponding decoder of hidden file coding when verifying the reliability of CD
Whether the hidden file is had on the CD of card, so as to reach the purpose of data source reliability demonstration.
Embodiment 1
Referring to Fig. 2, the original document of the embodiment of the present invention 1 is illustrated using one section of DVD physical runlength sequence（Figure
Indicating is designated as：A）, it is followed successively by run length：7T, 7T, 3T, 3T, 9T, 11T, 7T, 7T, 11T and 9T.
Illustrated in the hidden file using a certain byte（Diagram is labeled as：B）, a kind of the embodiment of the present invention should
Byte is 0x9E, and it is 10011110 to be converted to after binary sequence.
The Zi Keng, sub- bank coded system are：DVD physical runlength of the selection more than or equal to 7T（It is defined as long physical runlength）
It is upper just to consider whether to set sub- hole or sub- bank, wherein, son hole or sub- bank, 0 corresponding long physics trip are set in 1 corresponding long physical runlength
Sub- hole or sub- bank are not provided with journey, so as to form the composite coding or the 3rd imprinting laser switch signal（Diagram is labeled as：
AB）.
Embodiment 2
Illustrated in the embodiment of the present invention 2 using original document using one section of DVD physical runlength sequence, in the distance of swimming
3T, 8T, 10T, 5T, 5T, 7T, 5T are followed successively by length.Similarly, the Zi Keng, sub- bank coded system are：Selection is more than or equal to
7T DVD physical runlengths（It is defined as long physical runlength）It is upper that son hole or sub- bank are just set with credible CD described in imprinting.
Referring to Fig. 3, wherein, dotted line reads radiofrequency signal for the only original disc including original document, and solid line is described
The reading radiofrequency signal of credible CD.It can be seen that Zi Keng, the reading radiofrequency signal of sub- bank are added relative to primary light
Disk reads radiofrequency signal, only causes amplitude change in coal addition position, but the phase for crossing cutting level is unchanged.The DVD
The process of decoding is：1. the radiofrequency signal of simulation is used into clock sampling, turn into discrete digital radio signal A1；2. use
Digital radio signal is carried out resampling by PLL technology, turns into discrete digital radiofrequency signal A2 of the sampling period for a T；3. pair
In discrete digital radiofrequency signal A2, the value more than cutting level is arranged to 1, and the value less than cutting level is arranged to 0, here can be with
Find out, in DVD decoders, only exist higher than cutting level and be less than cutting level two states.Therefore, this difference in magnitude
It is different system noise to be taken as to handle for traditional DVD solution code systems, without influenceing identification 8T, 10T and 7T just
True rate, so as to reach the purpose hidden with encryption data.For other types of CD decoding process and DVD decoding process classes
Seemingly, so as to which other types of CD can also realize image watermarking and the purpose encrypted by the credible CD drive 100.
In addition, those skilled in the art can also make other changes in spirit of the invention, these are according to present invention essence certainly
The change that god is made, it should all be included in scope of the present invention.
In addition, those skilled in the art can also make other changes in spirit of the invention, these are according to present invention essence certainly
The change that god is made, it should all be included in scope of the present invention.
Claims (7)
1. a kind of image watermarking and encryption method based on optical storage media, comprise the following steps：
Original document is received, and original document is converted into binary sequence A, binary sequence A corresponds to optical storage media
Hole and bank in physical runlength；
Hidden file is received, and the hidden file is converted into binary sequence B；
Binary sequence B Yi Zikeng, sub- bank coded system are subjected to coding with the binary sequence A and form a compound volume
Code, son hole is formed so as to be formed at least part hole of the optical storage media physical runlength in sub- bank and at least part bank,
Wherein, the quantity of the sub- bank set in a hole is 1, and the quantity in the sub- hole set in a bank is
1, and
By the composite coding hole that imprinting is formed in physical runlength on the optical storage media, bank, sub- bank and son hole.
2. image watermarking and encryption method based on optical storage media as claimed in claim 1, it is characterised in that the light is deposited
Storage media is CD, including at least one of DVD, CD, BD, EVD and HDDVD.
3. image watermarking and encryption method based on optical storage media as claimed in claim 1, it is characterised in that described two enter
Sequence B processed includes 1 and 0 liang of class data bit, and the Zi Keng, sub- bank coded system further comprise：When for 1 when, enter described two
Sub- bank or son hole are set in hole corresponding to sequence A processed and bank, when for 0 when, not in hole and bank corresponding to the binary sequence A
Sub- bank or son hole are set.
4. image watermarking and encryption method based on optical storage media as claimed in claim 1, it is characterised in that described two enter
Sequence B processed includes 1 and 0 liang of class data bit, and the Zi Keng, sub- bank coded system further comprise：When for 0 when, enter described two
Sub- bank or son hole are set in hole corresponding to sequence A processed and bank, when for 1 when, not in hole and bank corresponding to the binary sequence A
Sub- bank or son hole are set.
5. image watermarking and encryption method based on optical storage media as claimed in claim 1, it is characterised in that the son
Hole, sub- bank coded system can further comprise selecting the hole of specific physical runlength length and set the sub- bank and son on the bank
Hole, less than the specific physical runlength length hole and be not provided with the sub- bank and Zi Keng on the bank.
6. image watermarking and encryption method based on optical storage media as claimed in claim 1, it is characterised in that described in one
The quantity of the sub- bank set in hole is 1, and the quantity in the sub- hole set in a bank is 1.
7. image watermarking and encryption method based on optical storage media as claimed in claim 1, it is characterised in that described in control
Zi Keng, sub- bank length, the reading radiofrequency signal for including the hole of the sub- bank is no more than cutting level, and make described include
The reading radiofrequency signal for having the sub- hole is not less than cutting level, and the cutting level is sentenced when reading data for the hole and bank
Disconnected standard, the output signal in the hole are less than the cutting level, and the output signal of the bank is more than the cutting level.
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| CN106782624B (en) * | 2016-12-02 | 2019-10-25 | 北京同方光盘股份有限公司 | Compact disc recordable adds hidden identification method and device |
| CN108922567B (en) * | 2018-06-29 | 2020-08-21 | 北京同方光盘股份有限公司 | Method and device for limiting reading times of hidden data of optical disc |
| CN108830116A (en) * | 2018-06-29 | 2018-11-16 | 北京同方光盘股份有限公司 | Identity identifying method and device based on CD hiding data |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1692413A (en) * | 2003-01-06 | 2005-11-02 | 索尼株式会社 | Mastering device, disc manufacturing method, disc-shaped recording medium, disc reproduction device, and disc reproduction method |
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- 2015-07-09 CN CN201510399642.8A patent/CN105096984B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1692413A (en) * | 2003-01-06 | 2005-11-02 | 索尼株式会社 | Mastering device, disc manufacturing method, disc-shaped recording medium, disc reproduction device, and disc reproduction method |
Non-Patent Citations (1)
| Title |
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| multi-level recordable disc using signal waveform modulaton;jing pei.,etc;《2012 International Workshop on Information Storage and Ninth International Symposium on Optical Storage》;20140828;摘要，引言，第2.2节，附图1 * |
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