CN106782624B - Compact disc recordable adds hidden identification method and device - Google Patents
Compact disc recordable adds hidden identification method and device Download PDFInfo
- Publication number
- CN106782624B CN106782624B CN201611095542.7A CN201611095542A CN106782624B CN 106782624 B CN106782624 B CN 106782624B CN 201611095542 A CN201611095542 A CN 201611095542A CN 106782624 B CN106782624 B CN 106782624B
- Authority
- CN
- China
- Prior art keywords
- loaded
- data
- frame
- length
- bank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- G11B20/00094—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised record carriers
- G11B20/00115—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised record carriers wherein the record carrier stores a unique medium identifier
Landscapes
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Signal Processing (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
The present invention relates to a kind of method and devices of the additional hidden identification of compact disc recordable, which comprises detects and record compact disc recordable loads distance of swimming sequence；Mark data to be loaded is obtained, the mark data to be loaded is modulated according to preset modulating rule, obtains identification data sequence to be loaded；Distance of swimming sequence and the identification data sequence to be loaded are loaded according to described, rule is controlled by preset load, obtains engraving data sequence；Export the engraving data sequence.Method provided by the present invention, can be under the premise of not influencing the reading of compact disc recordable data with existing, additional hidden identification data, and guarantees the confidentiality of added hidden identification data.
Description
Technical field
The present invention relates to CDs can record technical field, more particularly to a kind of additional hidden identification method of compact disc recordable and dress
It sets.
Background technique
Traditional optical digital disk product is all to be situated between after converting information into binary data with certain modulation system and storage
Two kinds of different physical states of matter record symbol are corresponding, realize data storage, become two-value storage.Currently, compact disc recordable
It is mostly two-value storage used by memory technology, judges that current corresponding position is according to the height of the light intensity of reflected light
" hole " (Pit) or " bank " (Land) can recorde two status numbers in each recording unit, respectively correspond the letter of 1 (bit)
Breath.
Compact disc recordable be can engraving data as desired CD, in the actual use of compact disc recordable, it is sometimes desirable to
The imprinting identification information on the compact disc recordable of data with existing, how in the premise for not destroying existing data information on compact disc recordable
Under, hiding mark data is added, and guarantee the safety and concealment of mark data, is that one in traditional technology is important
Research topic.
Summary of the invention
Based on this, it is necessary to for how under the premise of not destroying existing data information on compact disc recordable, add hidden
The mark data of hiding, and guarantee the safety and concealed problem of mark data, a kind of additional hide of compact disc recordable is provided and is marked
The method and device of knowledge.
The method of the additional hidden identification of compact disc recordable provided by the present invention includes:
It detects and record compact disc recordable loads distance of swimming sequence；
Mark data to be loaded is obtained, the mark data to be loaded is modulated according to preset modulating rule, is obtained
Take identification data sequence to be loaded；
Distance of swimming sequence and the identification data sequence to be loaded are loaded according to described, is controlled and is advised by preset load
Then, engraving data sequence is obtained.
The detection and record compact disc recordable load distance of swimming sequence in one of the embodiments, comprising:
Obtain interval bit length a and load bit length b, and the length of b of the length of a at least equal to twice；
It detects and records the bank record symbol imprinted CDs, the length of the bank record symbol is greater than 2a+b if detecting, will
It is at least the position of a, with the initial position of bank record symbol and the interval of final position with the length of the load bit length b
Record one can load mark, the position of the remaining bank record symbol, since the initial position of bank record symbol, with institute
The length for stating load bit length b successively records non-load mark；
All marks and all non-load mark compositions of can loading of the compact disc recordable can be loaded into the distance of swimming
Sequence.
It is described in one of the embodiments, to detect and record the bank record symbol imprinted CDs, further includes:
If detecting, the length of the bank record symbol is greater than [(n+1) × a]+(n × b), and wherein n is the positive integer greater than 1,
Then the position for being at least a with the interval of bank record symbol and initial position is started, to be at least a in bank record symbol
Length records at equal intervals uniformly record at least two and can load mark, and described at least two can load last of mark
It is a to load mark, also it is at least a, the position of the remaining bank record symbol with the interval of the final position of bank record symbol
It sets, since the initial position of bank record symbol, non-load mark is recorded successively with the length of the load bit length b.
It is described in one of the embodiments, to obtain mark data to be loaded, according to preset modulating rule to it is described to
Load mark data is modulated, and obtains identification data sequence to be loaded, comprising:
Obtain the mark data to be loaded；
The mark data to be loaded is subjected to DK modulation according to preset code rate, DK is obtained and modulates frame data；
By DK modulation frame data according to preset record frame create-rule, identification data sequence to be loaded is obtained.
It is described in one of the embodiments, that the mark data to be loaded is subjected to DK modulation according to preset code rate,
It obtains DK and modulates frame data, comprising:
The mark data to be loaded is subjected to the untethered modulation of DK according to preset first code rate, obtains the untethered tune of DK
Frame data processed, or,
The mark data to be loaded is subjected to the limited modulation of DK according to preset second code rate, DK is obtained and is limited modulation-frame
Data；
It is described that the DK is modulated into frame data according to preset record frame create-rule, obtain mark data sequence to be loaded
Column, comprising:
By the untethered modulation frame data of the DK according to preset record frame create-rule, mark data sequence to be loaded is obtained
Column, or,
By the limited modulation frame data of the DK according to preset record frame create-rule, mark data sequence to be loaded is obtained
Column.
Described generate the limited modulation frame data of the DK according to preset record frame is advised in one of the embodiments,
Then, identification data sequence to be loaded is obtained, comprising:
By the limited modulation frame data of the DK according to preset record frame create-rule, generates DK and be limited frame data；
The DK is limited frame data and carries out contracting acyclic homologically trioial system, obtains identification data sequence to be loaded.
The record frame create-rule in one of the embodiments, comprising:
Before every frame data of DK modulation frame data, intubating length is the record frame head of the first frame length, generates DK frame
Data.
In one of the embodiments, before every frame data that the DK is modulated to frame data, intubating length first
The record frame head of frame length generates DK frame data, comprising:
The record frame head includes at least two original frame heads；
Before every frame data that the DK is modulated to frame data, intubating length is the record frame head of the first frame length, is generated
DK frame data, comprising:
Before every frame data of DK modulation frame data, according to preset cycline rule, being sequentially inserted into length is first
Described at least two original frame heads of frame length generate DK frame data.
The method of the additional hidden identification of compact disc recordable provided by one of embodiment, detects adding in compact disc recordable
The bank run-length recording that hidden identification can be loaded is that can load distance of swimming sequence, and by mark to be loaded by the bank distance of swimming for carrying hidden identification
Know data and form mark sequence to be loaded through ovennodulation, loads distance of swimming sequence and mark sequence to be loaded further according to described,
Rule is controlled by preset load, acquisition can record data sequence, can be used for additional hidden identification of imprinting CDs after output.This hair
Bright method, can be under the premise of not influencing the reading of compact disc recordable data with existing, additional hidden identification data, and guarantees to add
Hidden identification data confidentiality.
The method of the additional hidden identification of compact disc recordable provided by one of embodiment, according to selected load bit length
With interval bit length, reselection loads a hidden identification data, or the multiple hidden identification data of load on it can load the bank distance of swimming,
Under the premise of not influencing compact disc recordable reading legacy data, make full use of compact disc recordable loads the bank distance of swimming, and load is hidden
Mark data, and multiple hidden identification data are loaded in the bank distance of swimming by that can load at one, it improves and is loaded in compact disc recordable
Hidden identification data information content.
The method of the additional hidden identification of compact disc recordable provided by one of embodiment can carry out DK to data to be loaded
Data to be loaded, are modulated to the hidden identification data that can be recorded in compact disc recordable, institute by untethered modulation and the limited modulation of DK
The flexible data modulation provided, can satisfy the modulation demand of different data to be loaded.
The method of the additional hidden identification of compact disc recordable provided by one of embodiment can carry out DK to data to be loaded
After limited modulation, the DK that will acquire is limited frame data further progress contracting acyclic homologically trioial system, improves the information content of data sequence to be loaded.
The method of the additional hidden identification of compact disc recordable provided by one of embodiment, is utilized as data sequence to be loaded
Every frame data before, circuit sequentially insertion primitive frame header structure, generate DK frame data so that data sequence to be loaded itself has
The functions such as completeness check.
The present invention also provides a kind of devices of the additional hidden identification of compact disc recordable, comprising:
Distance of swimming sequence generating module can be loaded, loads distance of swimming sequence for detect and record compact disc recordable；
Identification data sequence generation module to be loaded, for obtaining mark data to be loaded, according to preset modulating rule
The mark data to be loaded is modulated, identification data sequence to be loaded is obtained；
Engraving data sequence generating module, for distance of swimming sequence and the mark data sequence to be loaded can be loaded according to
Column control rule by preset load, obtain engraving data sequence.
It is described in one of the embodiments, to load distance of swimming sequence generating module, comprising:
Bit length determination unit, for obtaining interval bit length a and load bit length b, and the length of a is at least equal to twice
The length of b；
Identification generation unit, for detecting and recording the bank imprinted CDs record symbol, if detecting the bank record symbol
Length is greater than 2a+b, then the interval of initial position and final position with bank record symbol is at least to the position of a, with institute
Mark, the position of the remaining bank record symbol, from bank record symbol can be loaded by stating length records one of load bit length b
Initial position starts, and successively records non-load mark with the length of the load bit length b；
Distance of swimming sequence generating unit can be loaded, for all of the compact disc recordable described can be loaded mark and all institutes
Distance of swimming sequence can be loaded by stating non-load mark composition.
The identification generation unit in one of the embodiments, if being also used to detect the length of the bank record symbol
Greater than [(n+1) × a]+(n × b), wherein n is the positive integer greater than 1, then by the interval with the bank record symbol and initial position
At least position of a starts, the bank record symbol in be at least the length records at equal intervals of a uniformly record at least two can
Load mark, and described at least two can load mark the last one can load mark with the bank record symbol stop bit
The interval set also is at least a, the position of the remaining bank record symbol, since the initial position of bank record symbol, with institute
The length for stating load bit length b successively records non-load mark.
The identification data sequence generation module to be loaded in one of the embodiments, comprising:
Mark data acquiring unit to be loaded, for obtaining the mark data to be loaded；
Modulation-frame data generating unit, for the mark data to be loaded to be carried out DK modulation according to preset code rate,
It obtains DK and modulates frame data；
Identification data sequence generation unit to be loaded, for generating DK modulation frame data according to preset record frame
Rule obtains identification data sequence to be loaded.
The modulation-frame data generating unit in one of the embodiments, comprising:
Untethered modulation frame data generate subelement, are used for the mark data to be loaded according to preset first code rate
The untethered modulation of DK is carried out, the untethered modulation frame data of DK are obtained, or,
Limited modulation frame data generate subelement, for by the mark data to be loaded according to preset second code rate into
The limited modulation of row DK obtains the limited modulation frame data of DK；
The identification data sequence generation module to be loaded, comprising:
Untethered identification data sequence generation unit to be loaded is used for the untethered modulation frame data of the DK according to default
Record frame create-rule, obtain identification data sequence to be loaded, or,
It is limited identification data sequence generation unit to be loaded, for the DK to be limited modulation frame data according to preset note
Frame create-rule is recorded, identification data sequence to be loaded is obtained.
The limited modulation frame data generate subelement in one of the embodiments, for the DK to be limited modulation
Frame data generate DK and are limited frame data according to preset record frame create-rule；The DK is limited frame data and carries out contracting acyclic homologically trioial
System, obtains identification data sequence to be loaded.
The identification data sequence generation unit to be loaded in one of the embodiments, is used for the DK modulation-frame
Before every frame data of data, intubating length is the record frame head of the first frame length, generates DK frame data.
The record frame head includes at least two original frame heads in one of the embodiments,；
The identification data sequence generation unit to be loaded, for pressing before every frame data of DK modulation frame data
According to preset cycline rule, the described at least two original frame heads that length is the first frame length are sequentially inserted into, DK frame data are generated.
The device of the additional hidden identification of compact disc recordable provided by one of embodiment, detects adding in compact disc recordable
The bank run-length recording that hidden identification can be loaded is that can load distance of swimming sequence, and by mark to be loaded by the bank distance of swimming for carrying hidden identification
Know data and form mark sequence to be loaded through ovennodulation, loads distance of swimming sequence and mark sequence to be loaded further according to described,
Rule is controlled by preset load, acquisition can record data sequence, can be used for additional hidden identification of imprinting CDs after output.This hair
Bright method, can be under the premise of not influencing the reading of compact disc recordable data with existing, additional hidden identification data, and guarantees to add
Hidden identification data confidentiality.
The device of the additional hidden identification of compact disc recordable provided by one of embodiment, according to selected load bit length
With interval bit length, reselection loads a hidden identification data, or the multiple hidden identification data of load on it can load the bank distance of swimming,
Under the premise of not influencing compact disc recordable reading legacy data, make full use of compact disc recordable loads the bank distance of swimming, and load is hidden
Mark data, and multiple hidden identification data are loaded in the bank distance of swimming by that can load at one, it improves and is loaded in compact disc recordable
Hidden identification data information content.
The device of the additional hidden identification of compact disc recordable provided by one of embodiment can carry out DK to data to be loaded
Data to be loaded, are modulated to the hidden identification data that can be recorded in compact disc recordable, institute by untethered modulation and the limited modulation of DK
The flexible data modulation provided, can satisfy the modulation demand of different data to be loaded.
The device of the additional hidden identification of compact disc recordable provided by one of embodiment can carry out DK to data to be loaded
After limited modulation, the DK that will acquire is limited frame data further progress contracting acyclic homologically trioial system, improves the information content of data sequence to be loaded.
The device of the additional hidden identification of compact disc recordable provided by one of embodiment, is utilized as data sequence to be loaded
Every frame data before, circuit sequentially insertion primitive frame header structure, generate DK frame data so that data sequence to be loaded itself has
The functions such as completeness check.
Detailed description of the invention
Fig. 1 is that imprinting controls signal correction schematic diagram；
Fig. 2 is the flow diagram of the method for the additional hidden identification of compact disc recordable of one embodiment；
Fig. 3 is the flow diagram of the method for the additional hidden identification of compact disc recordable of another embodiment；
Fig. 4 is the flow diagram of the method for the additional hidden identification of compact disc recordable of another embodiment；
Fig. 5 is the flow diagram of the method for the additional hidden identification of compact disc recordable of further embodiment；
Fig. 6 is the flow diagram of the method for the additional hidden identification of compact disc recordable of further embodiment；
Fig. 7 is the structural schematic diagram of the device of the additional hidden identification of compact disc recordable of one embodiment；
Fig. 8 is the structural schematic diagram of the device of the additional hidden identification of compact disc recordable of another embodiment；
Fig. 9 is the structural schematic diagram of the device of the additional hidden identification of compact disc recordable of another embodiment.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, right with reference to the accompanying drawings and embodiments
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
Compact disc recordable second load data principles are as follows: it is as shown in Figure 1 that imprinting controls signal correction principle.It is current when detecting
When signal is load signal, imprinting control signal does the multistage modulation of super-resolution.That is, " sub- hole " modulation is added in the bank distance of swimming,
It cheats and " sub- bank " modulation is added in the distance of swimming.
Fig. 2 is the flow diagram of the method for the additional hidden identification of compact disc recordable of one embodiment, and as shown in Figure 2 can
Recording the method that CD adds hidden identification includes:
Step S100, is detected and record compact disc recordable loads distance of swimming sequence.
Specifically, detection needs to load the bank distance of swimming in the compact disc recordable of hidden identification data first, according to the principle of Fig. 1
Figure, using in the bank distance of swimming add son hole modulation system, and the degree of the opposite bank distance of swimming and be added in the bank distance of swimming son hole
Length is limited, such as on the basis of the length of the bank distance of swimming meets certain bit length, the son hole of addition limitation bit length, to guarantee
The initial data in compact disc recordable can be read according to original bank distance of swimming, and can be read according to the son hole of the limitation bit length of addition
Hidden identification data.
In general, the length in the son hole of addition can be set as 1t-1.5t.Assuming that when the length in the sub- hole is 1t, it is described
The bank distance of swimming length need be more than or equal to 5t, and son hole length and the bank distance of swimming where it initial position between interval
It is greater than the son hole length equal to 2 times, after meeting above-mentioned setting, can guarantees and can read the number of original bank distance of swimming
It is influenced according to the son hole without carrying hidden identification data added by it, and hidden identification data information can be carried.
Step S200 obtains mark data to be loaded, according to preset modulating rule to the mark data to be loaded into
Row modulation, obtains identification data sequence to be loaded.
Specifically, being formatted after obtaining mark data to be loaded, ECC inspection Error Correction of Coding, then may be selected to carry out DK
Limited modulation, or the untethered modulation of DK is carried out, modulated data are that frame structure is obtained by being inserted into frame head before every frame data
Take last identification data sequence to be loaded.Wherein, it carries out DK and is limited modulated data, contracting acyclic homologically trioial system can be carried out again, improve
The information content of mark data to be loaded.
Step S300 loads distance of swimming sequence and the identification data sequence to be loaded according to described, is added by preset
Control rule is carried, engraving data sequence is obtained.
Specifically, can load distance of swimming sequence and the identification data sequence progress superposition to be loaded by described in, acquisition can be recorded
Data sequence.
The method of the additional hidden identification of compact disc recordable provided by the present embodiment, detect in compact disc recordable load it is hiding
The bank run-length recording that hidden identification can be loaded is that can load distance of swimming sequence, and by mark data to be loaded by the bank distance of swimming of mark
Mark sequence to be loaded is formed through ovennodulation, distance of swimming sequence and mark sequence to be loaded are loaded further according to described, by pre-
If load control rule, acquisition can record data sequence, can be used for additional hidden identification of imprinting CDs after output.Side of the invention
Method, can be under the premise of not influencing the reading of compact disc recordable data with existing, additional hidden identification data, and guarantee to be added hides
The confidentiality of mark data.
Fig. 3 is the flow diagram of the method for the additional hidden identification of compact disc recordable of another embodiment, as shown in Figure 3
The method of the additional hidden identification of compact disc recordable includes:
Step S110 obtains interval bit length a and load bit length b, and the length of b of the length of a at least equal to twice.
Specifically, after being loaded with sub- hole in a length of bank distance of swimming of gap digit, the starting in the sub- hole and the bank distance of swimming
The gap length of position or final position, the length that the son for loading bit length to be loaded in the bank distance of swimming is cheated.The interval
The relationship of bit length and the load bit length is that the interval bit length needs the length of the load bit length at least equal to twice.It is described
It is spaced bit length and loads the length setting of bit length, be to guarantee after adding hidden identification data in the bank distance of swimming, not influencing can
Record CD legacy data is read.
Step S120 is detected and is recorded the bank record symbol imprinted CDs, if detecting, the length of the bank record symbol is greater than
The interval of initial position and final position with bank record symbol is at least the position of a, then with the load position by 2a+b
Length records one of long b can load mark, the position of the remaining bank record symbol, from the initial position of bank record symbol
Start, non-load mark is recorded successively with the length of the load bit length b.
Specifically, can be swum in the bank when the length that the bank for detecting the compact disc recordable records symbol is greater than 2a+b
The hidden identification data that length is b, and the initial position of the hidden identification data and the bank distance of swimming are loaded in journey
All it is at least a with the interval of final position.
After having recorded load mark, in the rest position of the bank distance of swimming, non-load mark is recorded with this.Add as described
Load is identified as 1, and the position for identifying the bank distance of swimming can load hidden identification, then non-load mark can use 0 mark, non-load mark
The bit length of knowledge can be equal to load bit length.
Step S130, by the compact disc recordable it is all it is described can load mark and all non-load marks form can
Load distance of swimming sequence.
Specifically, can load mark 1 and non-load mark 0 by described in, composition can load distance of swimming sequence.
The method of the additional hidden identification of compact disc recordable provided by the present embodiment, according to selected load bit length and interval
Bit length, selection load a hidden identification data on it can load the bank distance of swimming, read legacy data not influencing compact disc recordable
Under the premise of, make full use of compact disc recordable loads bank distance of swimming load hidden identification data.
Fig. 4 is the flow diagram of the method for the additional hidden identification of compact disc recordable of another embodiment, as shown in Figure 4
The method of the additional hidden identification of compact disc recordable includes:
Step S110 obtains interval bit length a and load bit length b, and the length of b of the length of a at least equal to twice.
Step S120 ', if detecting, the length of bank record symbol is greater than [(n+1) × a]+(n × b), wherein n be greater than
The position for being at least a with the interval of bank record symbol and initial position is then started, records and accord in the bank by 1 positive integer
In record at least two uniformly to be at least the length records at equal intervals of a and can load mark, and described at least two can load
The last one of mark can load mark and the interval of the final position of bank record symbol is also at least a, the remaining bank
The position for recording symbol is successively recorded non-load since the initial position of bank record symbol with the length of the load bit length b
Mark.
Specifically, it is hidden that at least two can be loaded in a bank distance of swimming when detecting bank distance of swimming long enough
Mark data is hidden, but in order to not influence the reading of compact disc recordable legacy data, at least two hidden identification data phases loaded
Between mutually, between hidden identification data and the initial position and final position of the bank distance of swimming, still to keep as defined in the bit length a of interval away from
From.
Step S130, by the compact disc recordable it is all it is described can load mark and all non-load marks form can
Load distance of swimming sequence.
The method of the additional hidden identification of compact disc recordable provided by one of embodiment, according to selected load bit length
With interval bit length, also selection loads multiple hidden identification data on it can load the bank distance of swimming, reads original not influencing compact disc recordable
Under the premise of there are data, multiple hidden identification data are loaded in the bank distance of swimming by that can load at one, improve institute in compact disc recordable
The information content of the hidden identification data of load.
Fig. 5 is the flow diagram of the method for the additional hidden identification of compact disc recordable of further embodiment, as shown in Figure 5
The method of the additional hidden identification of compact disc recordable includes:
Step S210 obtains the mark data to be loaded.
Specifically, mark data to be loaded, to need additional hidden identification data.
Step S220 judges whether to the untethered modulation of DK, if so, step S230 is met, if not, skipping to step S230 '.
Specifically, modulating firstly, it is necessary to determine the mark data to be loaded which kind of being carried out, it is non-to can choose progress DK
Limited modulation and the limited modulation of DK.
The mark data to be loaded is carried out the untethered modulation of DK according to preset first code rate, obtained by step S230
The untethered modulation frame data of DK.
Specifically, carrying out the untethered modulation of DK as determined, then the untethered modulation of DK is carried out according to preset first code rate,
Such as, mark data to be loaded is subjected to DK (0,9) modulation according to the code rate of R=8/9.
It is inserted into a data after each byte, it should be opposite with last position of the byte for data.Such as: byte data turns
Low level first goes out when changing bit data stream into, then last position of each byte is not highest order (b7).At this point, being inserted into if b7=' 1 '
Position b8=' 0 '；Conversely, not 1 b8=' '.Code table is as follows.
| Input code word | Output codons |
| b0…b7 | b0…b7b8 |
| xxxx xxx1 | xxxx xxx1 0 |
| xxxx xxx0 | xxxx xxx0 1 |
Step S240 is obtained to be loaded by the untethered modulation frame data of the DK according to preset record frame create-rule
Identification data sequence.
The untethered modulation frame data of the DK are obtained into mark data sequence to be loaded according to preset record frame create-rule
Column.The record frame create-rule, including by before every frame data of DK modulation frame data, intubating length is the first frame length
Frame head is recorded, DK frame data are generated.Further, the record frame head includes at least two original frame heads；The DK is modulated
Before every frame data of frame data, according to preset cycline rule, it is sequentially inserted at least two original that length is the first frame length
Beginning frame head generates DK frame data.
The frame head data that 20 bits contain frame head condition code will be added before every frame modulation data constitutes complete record frame
Data.In order to improve integrality judgement when record data are read, each record frame line sets inserting for different original frame heads
Enter sequence.
Total four kinds different original frame heads are listed below.
Original frame head:
SYNC0=1000 0,010 0,000 0,000 0001
SYNC1=1010 0,010 0,000 0,000 0001
SYNC2=1001 0,010 0,000 0,000 0001
SYNC3=1000 1,010 0,000 0,000 0001
Four kinds of different original frame heads press the sequence of SYNC ID=0 112233121323, are sequentially inserted into
Before the ECC row modulation data of 2184 bits, and every 13 record frames recycle.
The mark data to be loaded is carried out the limited modulation of DK according to preset second code rate, obtains DK by step S230 '
Limited modulation frame data.
Specifically, carrying out the limited modulation of DK as determined, then the limited modulation of DK is carried out according to preset second code rate, it e.g., will
Mark data to be loaded carries out DK (1,7) modulation according to R=2,3 code rate.
By the code rate of R=2/3, by 182 bytes of every row ECC data, coding (code table such as following table institute is limited by DK (1,7)
Show), it is modulated to the record frame modulation data of (182*8) * 3/2=2184 bit.
Substantially modulating code table is
(1,7) code table
| Basic code table | Replace code table | ||
| 00 | 101 | 00/00 | 101000 |
| 01 | 100 | 00/01 | 100000 |
| 10 | 001 | 10/00 | 001000 |
| 11 | 010 | 10/01 | 010000 |
Step S240 ' obtains mark to be loaded by the limited modulation frame data of the DK according to preset record frame create-rule
Know data sequence.
The limited modulation frame data of the DK are obtained into identification data sequence to be loaded according to preset record frame create-rule.
The record frame create-rule, including by before every frame data of DK modulation frame data, intubating length is the note of the first frame length
Frame head is recorded, DK frame data are generated.Further, the record frame head includes at least two original frame heads；By the DK modulation-frame
Before every frame data of data, according to preset cycline rule, be sequentially inserted into that length is the first frame length described at least two are original
Frame head generates DK frame data.
The frame head data that 20 bits contain frame head condition code will be added before every frame modulation data constitutes complete record frame
Data.In order to improve integrality judgement when record data are read, each record frame line sets inserting for different original frame heads
Enter sequence.
Total four kinds different original frame heads are listed below.
Original frame head:
SYNC0=1000 0,010 0,000 0,000 0001
SYNC1=1010 0,010 0,000 0,000 0001
SYNC2=1001 0,010 0,000 0,000 0001
SYNC3=1000 1,010 0,000 0,000 0001
Four kinds of different original frame heads press the sequence of SYNC ID=0 112233121323, are sequentially inserted into
Before the ECC row modulation data of 2184 bits, and every 13 record frames recycle.
It is untethered can to carry out DK to data to be loaded for the method for the additional hidden identification of compact disc recordable provided by the present embodiment
Data to be loaded, are modulated to the hidden identification data that can be recorded in compact disc recordable by modulation and the limited modulation of DK, provided
Flexible data modulation can satisfy the modulation demand of different data to be loaded.It is utilized as data sequence to be loaded
Before every frame data, insertion primitive frame header structure is circuited sequentially, DK frame data are generated, so that data sequence to be loaded itself has had
The functions such as whole property verification.
Fig. 6 is the flow diagram of the method for the additional hidden identification of compact disc recordable of further embodiment, as shown in FIG. 6
The method of the additional hidden identification of compact disc recordable includes:
Step S241 ' generates DK and is limited frame by the limited modulation frame data of the DK according to preset record frame create-rule
Data.
The DK is limited frame data and carries out contracting acyclic homologically trioial system, obtains identification data sequence to be loaded by step S242 '.
Specifically, " contracting zero " processing is carried out to the load data sequence after the original frame head of insertion, to improve modulating-coding effect
Rate." contracting zero " coding rule are as follows: cancel each ' 1 ' subsequent ' 0 '.Such as:
Original data sequence are as follows: 01001010001010100000010010010100
Contracting Zero-code sequence are as follows: 0101100111000001010110
Original frame head after contracting zero:
SYNC0=0100 1,110 0,000 0,000 11
SYNC1=0110 0,110 0,000 0,000 11
SYNC2=0011 0,110 0,000 0,000 11
SYNC3=0101 0,110 0,000 0,000 11
The method of the additional hidden identification of compact disc recordable provided by the present embodiment can carry out the limited tune of DK to data to be loaded
After system, the DK that will acquire is limited frame data further progress contracting acyclic homologically trioial system, improves the information content of data sequence to be loaded.
Fig. 7 is the structural schematic diagram of the device of the additional hidden identification of compact disc recordable of one embodiment, and as shown in Figure 7 can
The device of the additional hidden identification of record CD includes:
Distance of swimming sequence generating module 100 can be loaded, loads distance of swimming sequence for detect and record compact disc recordable.
Identification data sequence generation module 200 to be loaded is advised for obtaining mark data to be loaded according to preset modulation
Then the mark data to be loaded is modulated, obtains identification data sequence to be loaded；Untethered mark data sequence to be loaded
Column-generation unit, for the untethered modulation frame data of the DK according to preset record frame create-rule, to be obtained mark to be loaded
Data sequence is known, or, identification data sequence generation unit to be loaded is limited, for the DK to be limited modulation frame data according to pre-
If record frame create-rule, obtain identification data sequence to be loaded.
Engraving data sequence generating module 300, for distance of swimming sequence and the mark number to be loaded can be loaded according to
According to sequence, rule is controlled by preset load, obtains engraving data sequence.
Compact disc recordable provided by the present embodiment adds the device of hidden identification, and loading in detection compact disc recordable is hiding
The bank run-length recording that hidden identification can be loaded is that can load distance of swimming sequence, and by mark data to be loaded by the bank distance of swimming of mark
Mark sequence to be loaded is formed through ovennodulation, distance of swimming sequence and mark sequence to be loaded are loaded further according to described, by pre-
If load control rule, acquisition can record data sequence, can be used for additional hidden identification of imprinting CDs after output.Side of the invention
Method, can be under the premise of not influencing the reading of compact disc recordable data with existing, additional hidden identification data, and guarantee to be added hides
The confidentiality of mark data.
Fig. 8 is the structural schematic diagram of the device of the additional hidden identification of compact disc recordable of another embodiment, as shown in Figure 8
The device of the additional hidden identification of compact disc recordable includes:
Bit length determination unit 110, for obtaining interval bit length a and load bit length b, and the length of a is at least equal to two
The length of b again.
Identification generation unit 120, for detecting and recording the bank imprinted CDs record symbol, if detecting the bank record symbol
Length be greater than 2a+b, then by with the bank record symbol initial position and final position interval be at least a position, with
Length records one of the load bit length b can load mark, and the position of the remaining bank record symbol records from the bank and accords with
Initial position start, with it is described load bit length b length successively record non-load mark；If being also used to detect the bank note
The length of record symbol is greater than [(n+1) × a]+(n × b), and wherein n is the positive integer greater than 1, then will record symbol and starting with the bank
The position that the interval of position is at least a starts, and is uniformly recorded in bank record symbol with the length records at equal intervals for being at least a
At least two can load mark, and described at least two can load the last one of mark and can load mark and record with the bank
The interval of the final position of symbol is also at least a, the position of the remaining bank record symbol, from the initial position of bank record symbol
Start, non-load mark is recorded successively with the length of the load bit length b.
Distance of swimming sequence generating unit 130 can be loaded, for all of the compact disc recordable described can be loaded mark and institute
Distance of swimming sequence can be loaded by being made of the non-load mark.
The device of the additional hidden identification of compact disc recordable provided by one of embodiment, according to selected load bit length
With interval bit length, also selection loads multiple hidden identification data on it can load the bank distance of swimming, reads original not influencing compact disc recordable
Under the premise of there are data, multiple hidden identification data are loaded in the bank distance of swimming by that can load at one, improve institute in compact disc recordable
The information content of the hidden identification data of load.
Fig. 9 is the structural schematic diagram of the device of the additional hidden identification of compact disc recordable of another embodiment, as shown in Figure 9
The device of the additional hidden identification of compact disc recordable includes:
Mark data acquiring unit 210 to be loaded, for obtaining the mark data to be loaded.
Modulation-frame data generating unit 220, for the mark data to be loaded to be carried out DK tune according to preset code rate
System obtains DK and modulates frame data；Include: that untethered modulation frame data generate subelement, is used for the mark data to be loaded
The untethered modulation of DK is carried out according to preset first code rate, obtains the untethered modulation frame data of DK, or, limited modulation frame data are raw
It is limited to obtain DK for the mark data to be loaded to be carried out the limited modulation of DK according to preset second code rate at subelement
Modulate frame data；The limited modulation frame data generate subelement, for the DK to be limited modulation frame data according to preset
Frame create-rule is recorded, DK is generated and is limited frame data；The DK is limited frame data and carries out contracting acyclic homologically trioial system, obtains mark to be loaded
Data sequence.
Identification data sequence generation unit 230 to be loaded, for the DK to be modulated frame data according to preset record frame
Create-rule obtains identification data sequence to be loaded；For by before every frame data of DK modulation frame data, intubating length to be
The record frame head of first frame length generates DK frame data.The record frame head includes at least two original frame heads；The mark to be loaded
Know data sequence generation unit, before every frame data for the DK to be modulated to frame data, according to preset cycline rule, successively
Intubating length is described at least two original frame heads of the first frame length, generates DK frame data.
It is untethered can to carry out DK to data to be loaded for the device of the additional hidden identification of compact disc recordable provided by the present embodiment
Data to be loaded, are modulated to the hidden identification data that can be recorded in compact disc recordable by modulation and the limited modulation of DK, provided
Flexible data modulation can satisfy the modulation demand of different data to be loaded.It is utilized as data sequence to be loaded
Before every frame data, insertion primitive frame header structure is circuited sequentially, DK frame data are generated, so that data sequence to be loaded itself has had
The functions such as whole property verification.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (16)
1. a kind of method of the additional hidden identification of compact disc recordable, which is characterized in that the described method includes:
It detects and record compact disc recordable loads bank distance of swimming sequence, the son for limiting the length of the bank distance of swimming and being added in the bank distance of swimming
The length in hole sets son hole of the interval between the length in son hole and the initial position of the bank distance of swimming where it more than or equal to twice
Length；
Obtain mark data to be loaded, the mark data to be loaded be modulated according to preset modulating rule, obtain to
Load identification data sequence；
Bank distance of swimming sequence and the identification data sequence to be loaded are loaded according to described, rule is controlled by preset load,
Obtain engraving data sequence.
2. the method for the additional hidden identification of compact disc recordable according to claim 1, which is characterized in that the detection simultaneously records
Compact disc recordable loads bank distance of swimming sequence, comprising:
It detects and records the bank record symbol imprinted CDs, the length of the bank record symbol is greater than 2a+b if detecting, will be with institute
The interval of the initial position and final position of stating bank record symbol is at least the position of a, with the length records of the load bit length b
One can load mark, and the position of the remaining bank record symbol is added since the initial position of bank record symbol with described
The length for carrying bit length b successively records non-load mark；
All marks and all non-load mark compositions of can loading of the compact disc recordable can be loaded into bank distance of swimming sequence
Column；
Wherein, a indicates interval bit length, and b indicates load bit length, described after being loaded with sub- hole in a length of bank distance of swimming of gap digit
Son hole and the initial position of the bank distance of swimming or the gap length of final position, the load bit length is is loaded in the bank distance of swimming
Son hole length.
3. the method for the additional hidden identification of compact disc recordable according to claim 2, which is characterized in that the detection simultaneously records
The bank record symbol imprinted CDs, further includes:
If detecting, the length of the bank record symbol is greater than [(n+1) × a]+(n × b), and wherein n is the positive integer greater than 1, then will
The bank record symbol with initial position interval be at least a position start, the bank record accord in be at least a etc.
Uniformly record at least two can load mark to gap length record, and described at least two can load the last one of mark can
Mark is loaded, is also at least a with the interval of the final position of bank record symbol, the remaining bank records the position of symbol, from
The initial position of the bank record symbol starts, and successively records non-load mark with the length of the load bit length b.
4. the method for the additional hidden identification of compact disc recordable according to claim 1, which is characterized in that the acquisition is to be loaded
Mark data is modulated the mark data to be loaded according to preset modulating rule, obtains mark data sequence to be loaded
Column, comprising:
Obtain the mark data to be loaded；
The mark data to be loaded is subjected to DK modulation according to preset code rate, DK is obtained and modulates frame data；
By DK modulation frame data according to preset record frame create-rule, identification data sequence to be loaded is obtained.
5. the method for the additional hidden identification of compact disc recordable according to claim 4, which is characterized in that it is described will be described to be added
It carries mark data and carries out DK modulation according to preset code rate, obtain DK and modulate frame data, comprising:
The mark data to be loaded is subjected to the untethered modulation of DK according to preset first code rate, obtains the untethered modulation-frame of DK
Data, or,
The mark data to be loaded is subjected to the limited modulation of DK according to preset second code rate, obtains the limited modulation frame number of DK
According to；
It is described that the DK is modulated into frame data according to preset record frame create-rule, identification data sequence to be loaded is obtained, is wrapped
It includes:
By the untethered modulation frame data of the DK according to preset record frame create-rule, identification data sequence to be loaded is obtained,
Or,
By the limited modulation frame data of the DK according to preset record frame create-rule, identification data sequence to be loaded is obtained.
6. the method for the additional hidden identification of compact disc recordable according to claim 5, which is characterized in that it is described by the DK by
Limit modulation frame data obtain identification data sequence to be loaded according to preset record frame create-rule, comprising:
By the limited modulation frame data of the DK according to preset record frame create-rule, generates DK and be limited frame data；
The DK is limited frame data and carries out contracting acyclic homologically trioial system, obtains identification data sequence to be loaded.
7. the method for the additional hidden identification of compact disc recordable according to claim 4, which is characterized in that the record frame generates
Rule includes:
Before every frame data of DK modulation frame data, intubating length is the record frame head of the first frame length, generates DK frame data.
8. the method for the additional hidden identification of compact disc recordable according to claim 7, which is characterized in that described by the DK tune
Before every frame data of frame data processed, intubating length is the record frame head of the first frame length, generates DK frame data, comprising:
The record frame head includes at least two original frame heads；
Before every frame data that the DK is modulated to frame data, intubating length is the record frame head of the first frame length, generates DK frame
Data, comprising:
Before every frame data of DK modulation frame data, according to preset cycline rule, being sequentially inserted into length is the first frame length
Described at least two original frame heads, generate DK frame data.
9. a kind of device of the additional hidden identification of compact disc recordable characterized by comprising
Distance of swimming sequence generating module can be loaded, loads bank distance of swimming sequence for detect and record compact disc recordable, limitation bank trip
The length of the length of journey and the son hole being added in the bank distance of swimming, sets the length in son hole and the initial position of the bank distance of swimming where it
Between interval more than or equal to twice son hole length；
Identification data sequence generation module to be loaded, for obtaining mark data to be loaded, according to preset modulating rule to institute
It states mark data to be loaded to be modulated, obtains identification data sequence to be loaded；
Engraving data sequence generating module, for bank distance of swimming sequence and the mark data sequence to be loaded can be loaded according to
Column control rule by preset load, obtain engraving data sequence.
10. the device of the additional hidden identification of compact disc recordable according to claim 9, which is characterized in that described to load trip
Journey sequence generating module, comprising:
Identification generation unit, for detecting and recording the bank imprinted CDs record symbol, if detecting the length of the bank record symbol
Greater than 2a+b, then the interval of the initial position of bank record symbol and final position is at least to the position of a, with the load
Length records one of bit length b can load mark, the position of the remaining bank record symbol, from the start bit of bank record symbol
Beginning is set, non-load mark is recorded successively with the length of the load bit length b；
Distance of swimming sequence generating unit can be loaded, for by all marks and all described non-of can loading of the compact disc recordable
Load mark composition can load bank distance of swimming sequence；
Wherein, a indicates interval bit length, and b indicates load bit length, described after being loaded with sub- hole in a length of bank distance of swimming of gap digit
Son hole and the initial position of the bank distance of swimming or the gap length of final position, the load bit length is is loaded in the bank distance of swimming
Son hole length.
11. the device of the additional hidden identification of compact disc recordable according to claim 10, it is characterised in that:
The identification generation unit, if being also used to detect, the length of the bank record symbol is greater than [(n+1) × a]+(n × b),
Middle n is the positive integer greater than 1, then starts the position for being at least a at the interval of bank record symbol with initial position, described
Mark, and described at least two can be loaded by recording at least two uniformly in bank record symbol to be at least the length records at equal intervals of a
The last one a for loading mark can load mark, also be at least a with the interval of the final position of bank record symbol, remaining
The bank record symbol position, since the bank record symbol initial position, with it is described load bit length b length successively remember
Record non-load mark.
12. the device of the additional hidden identification of compact disc recordable according to claim 9, which is characterized in that the mark to be loaded
Know data sequence generation module, comprising:
Mark data acquiring unit to be loaded, for obtaining the mark data to be loaded；
Modulation-frame data generating unit is obtained for the mark data to be loaded to be carried out DK modulation according to preset code rate
DK modulates frame data；
Identification data sequence generation unit to be loaded is advised for generating DK modulation frame data according to preset record frame
Then, identification data sequence to be loaded is obtained.
13. the device of the additional hidden identification of compact disc recordable according to claim 12, which is characterized in that the modulation frame number
According to generation unit, comprising:
Untethered modulation frame data generate subelement, for carrying out the mark data to be loaded according to preset first code rate
The untethered modulation of DK obtains the untethered modulation frame data of DK, or,
Limited modulation frame data generate subelement, for the mark data to be loaded to be carried out DK according to preset second code rate
Limited modulation obtains the limited modulation frame data of DK；
The identification data sequence generation module to be loaded, comprising:
Untethered identification data sequence generation unit to be loaded is used for the untethered modulation frame data of the DK according to preset note
Frame create-rule is recorded, identification data sequence to be loaded is obtained, or,
It is limited identification data sequence generation unit to be loaded, for the DK to be limited modulation frame data according to preset record frame
Create-rule obtains identification data sequence to be loaded.
14. the device of the additional hidden identification of compact disc recordable according to claim 13, it is characterised in that:
The limited modulation frame data generate subelement, for the limited modulation frame data of the DK are raw according to preset record frame
At rule, generates DK and be limited frame data；The DK is limited frame data and carries out contracting acyclic homologically trioial system, obtains mark data sequence to be loaded
Column.
15. the device of the additional hidden identification of compact disc recordable according to claim 12, it is characterised in that:
The identification data sequence generation unit to be loaded, for by before every frame data of DK modulation frame data, insertion to be grown
Degree is the record frame head of the first frame length, generates DK frame data.
16. the device of the additional hidden identification of compact disc recordable according to claim 15, it is characterised in that:
The record frame head includes at least two original frame heads；
The identification data sequence generation unit to be loaded, for by the DK modulation frame data every frame data before, according to pre-
If cycline rule, be sequentially inserted into length be the first frame length described at least two original frame heads, generate DK frame data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611095542.7A CN106782624B (en) | 2016-12-02 | 2016-12-02 | Compact disc recordable adds hidden identification method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611095542.7A CN106782624B (en) | 2016-12-02 | 2016-12-02 | Compact disc recordable adds hidden identification method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106782624A CN106782624A (en) | 2017-05-31 |
| CN106782624B true CN106782624B (en) | 2019-10-25 |
Family
ID=58883423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611095542.7A Active CN106782624B (en) | 2016-12-02 | 2016-12-02 | Compact disc recordable adds hidden identification method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106782624B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108962289B (en) * | 2018-06-29 | 2020-05-12 | 北京同方光盘股份有限公司 | Method and device for appending hidden identification data based on optical disc synchronous frame |
| 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 (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7124441B1 (en) * | 1998-11-12 | 2006-10-17 | Global Anti-Piracy Systems, Inc. | Method and apparatus for securely associating an optically readable memory with a user machine |
| US8144558B1 (en) * | 2004-09-14 | 2012-03-27 | Doug Carson & Associates, Inc. | Hidden patterns on a data storage medium |
| CN102682810A (en) * | 2011-03-17 | 2012-09-19 | 清华大学 | Run length ratio modulating data recording method and system |
| CN105096984A (en) * | 2015-07-09 | 2015-11-25 | 清华大学 | Data hiding and encrypting method based on optical storage medium |
| CN105096983A (en) * | 2015-07-09 | 2015-11-25 | 清华大学 | Trustful disc driver with data hiding and encrypting function |
-
2016
- 2016-12-02 CN CN201611095542.7A patent/CN106782624B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7124441B1 (en) * | 1998-11-12 | 2006-10-17 | Global Anti-Piracy Systems, Inc. | Method and apparatus for securely associating an optically readable memory with a user machine |
| US8144558B1 (en) * | 2004-09-14 | 2012-03-27 | Doug Carson & Associates, Inc. | Hidden patterns on a data storage medium |
| CN102682810A (en) * | 2011-03-17 | 2012-09-19 | 清华大学 | Run length ratio modulating data recording method and system |
| CN105096984A (en) * | 2015-07-09 | 2015-11-25 | 清华大学 | Data hiding and encrypting method based on optical storage medium |
| CN105096983A (en) * | 2015-07-09 | 2015-11-25 | 清华大学 | Trustful disc driver with data hiding and encrypting function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106782624A (en) | 2017-05-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100231670B1 (en) | Record carrier, method of and information recording device for obtaining such recording carriers | |
| US6804356B1 (en) | Hierarchical authentication system for images and video | |
| KR100220499B1 (en) | Digital data transmission system having error detecting and correcting function | |
| CN106782624B (en) | Compact disc recordable adds hidden identification method and device | |
| JP3946230B2 (en) | Record carrier | |
| KR960706168A (en) | Data recording / reproducing method, data reproducing apparatus and recording medium | |
| JPH0648582B2 (en) | Optical information recording / reproducing method | |
| US7489258B2 (en) | Device and method for embedding a secondary signal in a primary data bit stream on an optical disc | |
| JP3972879B2 (en) | Information recording processing apparatus, information reproducing processing apparatus, information recording medium and method, and computer program | |
| TW558904B (en) | Method for encoding a stream of bits of a binary source signal into a stream of bits of a binary channel signal, method and device for decoding a stream of bits of a binary channel signal into a stream of bits of a binary source signal | |
| US6125468A (en) | High-speed data recording method for digital versatile disk-random access memory | |
| US6674699B2 (en) | Method for identifying a reserved data area, and corresponding apparatus | |
| CN108962289A (en) | Method and device based on the additional hiding mark data of CD synchronization frame | |
| SG80581A1 (en) | Data hiding method and extraction method using statistical properties | |
| JP3982488B2 (en) | Information recording processing apparatus, information reproducing processing apparatus, information recording medium and method, and computer program | |
| CN100353445C (en) | Method and device for decoding data regulated by optical driver system 8-14 | |
| JP3953008B2 (en) | Information recording processing apparatus, information reproducing processing apparatus, information recording medium and method, and computer program | |
| CN100477529C (en) | Method for converting information words to a signal, coder and reproducer thereof | |
| JP2000082258A (en) | Data reproducing device | |
| JP3953007B2 (en) | Information recording processing apparatus, information reproducing processing apparatus, information recording medium and method, and computer program | |
| JPS6043556B2 (en) | character reading device | |
| JP2007507051A (en) | Characterization of information carrier materials for reproduction | |
| KR100324763B1 (en) | Tape performance testing method and apparatus for digital signal recording and reproducing apparatus | |
| JPH0316062A (en) | Data detecting method | |
| US20040057367A1 (en) | Method for manufacturing a record carrier as well as such a record carrier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |