CN1725345A - Addition of watermark keys according to a flexible format - Google Patents
Addition of watermark keys according to a flexible format Download PDFInfo
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- CN1725345A CN1725345A CNA2005100791901A CN200510079190A CN1725345A CN 1725345 A CN1725345 A CN 1725345A CN A2005100791901 A CNA2005100791901 A CN A2005100791901A CN 200510079190 A CN200510079190 A CN 200510079190A CN 1725345 A CN1725345 A CN 1725345A
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- 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
- G11B20/00884—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a watermark, i.e. a barely perceptible transformation of the original data which can nevertheless be recognised by an algorithm
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- G—PHYSICS
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- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
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- G11B19/02—Control of operating function, e.g. switching from recording to reproducing
- G11B19/04—Arrangements for preventing, inhibiting, or warning against double recording on the same blank or against other recording or reproducing malfunctions
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- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/02—Control of operating function, e.g. switching from recording to reproducing
- G11B19/12—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark
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- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
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- G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
- G11B20/00572—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which change the format of the recording medium
- G11B20/00586—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which change the format of the recording medium said format change concerning the physical format of the recording medium
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- G11B20/1217—Formatting, e.g. arrangement of data block or words on the record carriers on discs
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- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
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- G11B23/28—Indicating or preventing prior or unauthorised use, e.g. cassettes with sealing or locking means, write-protect devices for discs
- G11B23/283—Security features, e.g. digital codes
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- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
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- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/005—Reproducing
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- H04N5/00—Details of television systems
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- H04N5/91—Television signal processing therefor
- H04N5/913—Television signal processing therefor for scrambling ; for copy protection
- H04N2005/91307—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal
- H04N2005/91335—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal the copy protection signal being a watermark
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Abstract
The present invention relates to a method of recording signals on a disc recording carrier with marks of a first physical type. The method is different from the encoding format of coded signal data; and additional signals are inserted in the coded signals. The additional data are encoded according to a second format that is different from the encoding format of the coded signal data; or the marks of the same physical type are used, but the marks are modulated according to a second modulation method; or the marks of a second type that has different physical characteristics from the first type are used; the format description information, which is relevant to the second format, is recorded on the recording carrier.
Description
This case is that application number is 00801809.X, the applying date to be that on June 27th, 2000, denomination of invention are divided an application for " according to the flexible format addition of watermark keys ".
The present invention relates to a kind of as subsequently the described method of claim 1 preorder, this method be used for a coded signal insert additional data and with described signal record at disc-like record carrier.The invention still further relates to a kind of device of carrying out this method, use a kind of disc-like record carrier that this method obtains and a kind ofly be used to reproduce the device that is recorded in data on a kind of like this disc-like record carrier.
Growing for the needs that additional data is set in the Voice ﹠ Video signal.Watermark is a kind of additional data information that is inserted in the multimedia equipment, and this insertion is preferably carried out with the form that visually can not see.These watermarks comprise, for example, and the information of relevant document source or copyright status and viewing program.They can be used for providing copyright owner's legal proof, and can follow the tracks of abuse and support protection of Intellectual Property Rights.
In European Patent Application No. 98900036.9, disclose and a kind ofly knownly in coded audio and vision signal, inserted additional data and can not influence institute basically and feel the method for quality, this european patent application in this instructions back be file D1 in detectable reference paper.Disclosed herein is the method for a kind of applying unit bit encoder with audio-frequency signal coding, this scrambler can be such as the used sigma-delta modulator of audio form record high-quality audio-frequency signal with digital universal disc (DVD).This scrambler produces an output stream, and this output stream is included in the bit output sampling opposite with many bit sample used in each coding step.Thereby by with selected position for example the 100th numerical digit that replaces with digital watermark pattern of each output stream insert a digital watermark pattern.
This process is defective when being used to encroach right.Because demoder is arranged in the hardware components of a player, therefore, the form of the data of inserting must be fixed.All dishes will be encoded according to this form.A possible bootlegger can use this set form to obtain a large amount of coding materials.In case this bootlegger understands this coded format, his can decode all following contents and develop these technology then to avoid all protections.
This instructions latter end the file D2 in the reference paper table that can find be in the European patent 706174, disclose and a kind ofly be used to prevent be recorded in detection method such as the bootlegging of the output stream on the such light readable medium recording program performing of CD-ROM for form with the hole.Disclosed detection method comprises determines the unique physical characteristics of dish, with this information encryption and to be different from that the mode that is recorded in main information on this dish is used up or magnetic writes step on this dish.When this main information regeneration, detect and use the physical message that is comprised to check the physical characteristics of this dish to close therebetween whether there is certain particular kind of relationship once more so that make decision.This physical message can be the degree of depth in a kind of arrangement of cheating angle, hole and tracking amount, the second low reflecting part, dust position or the like.But for each dish, described physical characteristics must detect, and this makes to make and complicates.In addition, can not insert predetermined watermark information therein by this way.
Therefore, wherein an object of the present invention is to avoid above-mentioned defective.One of them aspect of the method according to this invention is characterized in that as the characteristic of claim 1 described.
The present invention allows to use form insertion flexibly to need the data of inserting, and this form all is specific for each record carrier or a group record carrier.When the bootlegger understood the form of the additional data insertion that is used for a kind of record carrier, he did not understand the form of other dishes.Can obtain safe protection by the explanation of on record carrier, placing other forms of described flexible format.Such as using different modulation to obtain, for example or optics or magnetic modulator approach for the mark of same physical type.Or use mark, or optical markings or magnetic mark with different physical type.Usually, the bit duplicator generally only duplicates the variation of using first kind of first physical parameter that modulation treatment obtained, and these change the main information that expression is write down.Have only specific reproduction equipment can detect such as the variation of using second kind of second physical parameter that modulation treatment obtained.
Having described relevant a kind of being used in independent claims 13,24 and 35 respectively is inserted into disc-like record carrier with additional data, the device on the record carrier and other the useful aspects of the present invention that are used to reproduce the device that is positioned at data on this record carrier.
In claim 2, described of the present invention another useful aspect.This aspect allows combination to be used for the pen recorder of data in a big way.In addition, can also make up pen recorder and transcriber.
Some effective embodiment that use the modulation of identical one's respective area have been described in dependent claims 3,4 and 5.
In other dependent claims, described of the present invention some other useful aspect.A specific useful embodiment has been described in claim 7.
Can make these and other beneficial effect of the present invention significantly and will be described this in detail hereinafter with reference to disclosed most preferred embodiment and with particular reference to subsequently accompanying drawing, in these accompanying drawings,
Fig. 1 shows a kind of record carrier that has the optical readable type of optically detectable marks;
Fig. 2 shows a kind of being used for according to the present invention coded data and additional data is recorded in device on as shown in Figure 1 the record carrier;
Fig. 3 shows in detail an embodiment who is used to revise coded signal;
Fig. 4 shows an example of amended bits of coded data stream;
Fig. 5 shows according to a kind of device that is used for reproducing from record carrier as shown in Figure 1 coded data and extraction additional data of the present invention;
Fig. 6 shows in detail the device that is used for extracting from the data stream of coded data and additional data additional data; And
Fig. 7 shows a kind of method that is used for additional data is inserted into coded signal according to of the present invention.
Fig. 1 shows a possibility embodiment according to used light recordable-type record carrier 1.But Fig. 1 a is the planimetric map that illustrates along by the arrangement of the light mark note of the represented track center line of reference signs 2.Fig. 1 b shows the amplification view of part 3, but this part 3 shows light mark note 4 and the zone line or the space 5 of arranging along track 2.But this light mark note 4 can be the form in local dent or so-called hole.But, but the light mark of other types note also is suitable, the mark that for example uses phase-change material and obtained.This mark 4 causes for the modulation along the reflection density of the beam of track 2 scanning directions.In Fig. 1 c, provide signal 6, the modulation of this signal indication under the situation of using constant linear velocity passing marker 4 and space 5 patterns along track 2.Along the length of the length of the mark 4 of track 2 and intermediate space 5 some bit locations (comprising) corresponding to signal 6.Bit location length T is corresponding to the period T of signal 6 data clocks.In Fig. 1 b, assign to represent a bit location by the orbit portion that has length L.
But for example can obtain by the applicant is the modulation of disclosed such other types in 91203147.3 in European Patent Application No., and this European patent occurs as file D3 in the reference paper table that this instructions latter end can be found.But Fig. 1 d shows to make and uses up the embodiment that mark is remembered 4 wide variety.The wide variety of mark 4 causes in extra density modulation in the beam of track 2 scannings, consequently produces two components in corresponding signal 6.In the time can not superposeing the component frequency spectrum that causes by width modulated, then can recover the represented information of any modulation separably by the component frequency spectrum that length modulated caused.Fig. 1 e shows the embodiment that use changes at the orbital position that is transverse to track 2 directions.This position modulation has the form that track rises and falls, just known radial track swing.Can also be by easily detecting this track wobble with certification mark 4 employed identical light-beam scanners.By using mark 4 degree of depth or change in location on recording medium 1 plane to obtain other modulation.Fig. 1 f shows the sectional view of the part 3 on the record carrier 1 of line b-b of this modulation of explanation.The transparent liner of reference number 7 expressions.But cover liner 7 with reflection horizon 8.Protective seam 9 covers reflection horizon 8.But have the light mark note 4 that occurs with the hole form on this liner 8.The position or the change in depth in hole 3 are represented by line 10 and 11.When with the pattern shown in the focused radiation bundle scintigram 1f, the variation in mark 4 planes causes can be by easy detected focusing error.
Fig. 2 shows an embodiment of the apparatus according to the invention, and this device is used for additional data is inserted into coded signal and described coded signal is recorded as shown in Figure 1 disc-like record carrier.Receive the first data-signal D1 at first input end 20.This data-signal D1 can represent data, video or audio-frequency information or the like.This data-signal D1 can be analog form or digital form.If this data-signal D1 is an analog form, thereby then provide a digital-to-analog converter 22 that this analog data signal D1 is converted to a digital data signal.Although generally, this A/D converter may cause the n position digital signal, in the situation of sound signal, can use 1 bit A/D converter to be used for being converted into a Bitstream signal BS usually.This Bitstream signal BS only has two different expression symbols, and " 0 " or " 1 ", therefore, this signal BS is a binary signal.This 1 bit A/D converter (also being called as bit stream translation device or δ-Delta modulator) can be used normally f
s=44.1,48 or a 32kHz sample frequency n frequency doubly come sound signal D1 is sampled, such frequency for example can be 64*44100=2822400Hz.As the sound signal D1 that digital form is provided, and with the sample frequency f of 44.1kHz
sIt is for example during 16 bits that its sampling and this sampling are represented as each sampling, uses still as this sample frequency f
sN frequency is doubly carried out over-sampling to this digital audio and video signals.Its result still produces 1 bit bit stream signal BS.
Sound signal is converted to 1 bit bit stream signal has many benefits.Bit stream translation is a kind of high-quality coding method, under the situation with simple this added advantage of decoding circuit, might obtain high-quality decoding or low-quality decoding.
According to the specific coding form additional data D2 is inserted among the bit stream BS.According to the present invention, some different coding forms can be used for this purpose.Possible form number is very big and can all be specific for each dish or for every group of dish.Therefore, can provide type generating device 25 to produce the represented specific coding form by format description signal F, F offers modifier 24 with this format description signal.Can have n.f with comprising subsequently
sThereby the resultant bit stream BS ' of 1 bit through revising offer extraction filter 26 and obtain to have f
sThe long numeric data stream of for example 16 bits of frequency.Use 27 pairs of these long numeric data streams of channel coding device to carry out such being used for of suitable chnnel coding such as EFM modulation 8 bit wide data bytes are converted to 14 channel bit wide channels words.In addition, additive error control information.
For this channel bit is recorded on the optically readable record carrier 1, fibrous root writes beam according to this channel bit modulation.For this purpose, provide modulating device 29 to control to write beam so that can be modulated at the light raadable mark arranged on the track of record carrier 1 and the length in space therebetween according to the channel bit that is obtained.This length modulated has been shown in Fig. 1 b.
Writing unit 30 is provided in addition, and this writing unit comprises that being used for except that laser cell and optical element will be positioned at the device that loop record carrier 1 beam radially writes the luminous point location according to the drive signal that is transmitted by modulating device 29.With drive unit 31 combination, this luminous point that is used for rotating according to the drive signal that is obtained from modulating device 29 this record carrier 1 can move along track.Use the channel bit that modulating device obtained to control this laser cell.
The synchronous S that is produced by clock-generating device 32 can be used for determining to write the speed of this Channel Elements and therefore definite channel clock period T as shown in Fig. 1 c.In addition, provide control device 35 to produce the control signal C that is used for control device.
Also format description information F is offered second code device 33 that is used for this information is encoded to second coded signal.Preferably this second coded signal is modulated the beam that writes that it is different from aforementioned length modulated by second modulating device 34 then.Figure 1 illustrates some examples of this different modulating.Shown in these examples comprise width second modulation (Fig. 1 d) of mark 4, position second modulation (Fig. 1 e) of the track 3 of mark 4 or mark position second modulation (Fig. 1 f) in the record carrier 7.The other types modulation is provided with radial streak, modulation track space width or the like near can being included in disk center.
The use different modulating that transcriber must be able to be read except that institute's record coding and amended bit stream is handled the format description information that is write down.Thereby make the demoder of additional data can be programmed the coded format flexibly of supporting this additional data like this.Can all be specific like this for each dish.To have insertion additional data the bit stream that writes down and corresponding encoded form be connected on the same vehicle, can guarantee to use comfortable like this.Above-mentioned two contents are combined with original legal content.By not only writing down such as the such additional data of watermark data, also record uses other modulation techniques with the used form of this additional data coding, and it is not enough only duplicating the bit stream that is encoded and revised.
Be noted that and can or directly obtain to have this recording of information carrier 1 with for example phase-change material.Perhaps directly obtain: having writing information on the stamper of photographic layer by following manner; subsequently the dish of illuminated mistake is developed, thereby by the casting pressing mold and use a reflectance coating and protective seam to produce a pressing mold of this dish and use this pressing mold to make final record carrier 1.
Usually, 1 bit A/the D converter can also be called as the cell bit scrambler, and bit stream signal can be used as the cell bit encoded signals.Some examples of this cell bit scrambler can be Delta modulator, δ-Delta modulator and form of noise scrambler.They all belong to and have feedback control loop scrambler family.δ-Δ modulation is used for writing down high-quality audio-frequency signal by the audio mode of digital universal disc (DVD), and the f of 2822400Hz is used in this modulation
sSample frequency (64*44100) also has the signal to noise ratio (S/N ratio) of 115dB.
Fig. 3 shows an example as δ-Delta modulator of 22 1 embodiment of AD converter among Fig. 2.Interchangeable embodiment is disclosed in file D1.Data-signal D1 is offered the subtracter 41 that is used for deducting output signal BS from input signal D1.Resulting error signal e offered decoding filter 42 (summer or integrator) thus obtain to be imported into a prediction signal in the polarity detector 43.This polarity detector 43 is with by sample frequency f
sDetermined speed also produces an output sampling+1 or-1 according to the polarity of this prediction signal.In this embodiment, multiplexer 44 has been formed the modifier among Fig. 1.These multiplexer 44 responses select signal SEL to use watermark bit pattern D2 to replace the selected bits (for example, each the 100th) of polarity detector 43 outputs.In fact, use the δ-Delta modulator shown in Fig. 3, can be at the f of 2822400 (64*44100) Hz
sThe acquisition of sample frequency place is used for the signal to noise ratio (S/N ratio) with the 115dB of audio-frequency signal coding.Can find that 1 sampling is replaced in per 100 samplings only increases synchronization noise 1dB.This is corresponding to the watermark bit speed with 28000 bps.
Another example that inserts watermark data D2 is the sampling of reversal phase coding signal y, with watermark data D2 by being represented by the bit period number between the anti-phase sampling continuously.
Fig. 4 shows an example that uses the input waveform 51 that embodiment encodes shown in Fig. 3.This input waveform 51 is consistent with the input signal D1 among Fig. 3, the numeral 52 expressions output signal that be encoded consistent with the bit stream BS among Fig. 3.When input signal became big, this δ-Delta modulator produced and more just samples.As shown in the figure, the input voltage of-0.5V is encoded to three-1V pulse and one+1V pulse train, the input voltage of 0V is encoded to interchangeable-1V pulse and one+1V pulse mode (except the watermark pulse 54 that is inserted into), and the input voltage of general+0.5V is encoded to three+1V pulse and one-1V pulse train.At receiving end by with received pulse shaping again and make it by a low-pass filter this coded signal of decoding once more.In the embodiments of figure 3, come this coded signal of demodulation by 13 sample means with bit stream 52.Numeral 53 expressions are except by the recombination signal the time delay that average treatment caused.
By will-1 sampling replace with+watermark that 1 sampling is carried out in this example handles.This watermark sampling of numeral 54 expressions.Can clearly interrupt+1V and-the replaceable pattern of 1V pulse.But because recombination signal 53 still is similar to input signal 51, therefore its influence of insertion of this watermark is limited.In detail disclosed as institute in file D1, this is because in feedback control loop, this influence is fed back to input end, and after watermark inserts, compensate this influence by subsequently input signal being encoded.
It will be appreciated that, although described the present invention with these embodiment that use aforesaid coding method and watermark insertion method,, the present invention is not limited thereto.
The method of inserting embedded data is very flexibly: quantity and the extracting position that can select to big degree of freedom embedded data.Selection signal SEL among Fig. 3 determines which position of bit stream is the watermark position.This information SEL is included in the common form of the format description information F that is produced by type generating device 25 among Fig. 2.In brief, this format description information F can only comprise that a N position that shows bit stream is several N of watermark position.For example, by replacement-1V respectively ,-1V and+the 6th, 16 and 26 of 1V bit stream, can obtain corresponding watermark pattern D2=' 001 '.
Can also use other method that is used to insert, such as, for example selected sampling of anti-phase this bit stream is represented the watermark data by the bit period number between continuous anti-phase sampling.
Obviously, higher if desired security can be used the more position complicated format that is used to insert the watermark data.Replace fixed number N, can use the variable number sequence, this sequence can produce according to a special algorithm.
But, according to the present invention, by allow to insert the watermark data flexibly form obtain safeguard protection.These needs write down for the explanation of form in addition so that notice is arranged in the programmable decoder of transcriber.As described,, use second code device 33 and second decoding device 34 for the purpose that obtains safer protection with reference to figure 2.Only be that those specific reproduction devices that have the particular detection device can extract the watermark data that is inserted.
Note, insert watermark data or other control data in this way and for example do not comprise, video or similar general data encrypted process main audio data.This coding stream only is subjected to The noise in a small amount, thereby causes the less reduction of signal to noise ratio (S/N ratio) equivalent.But encryption and decryption need the more data treatment circuit, and this can cause the higher cost expense.
For this reason, to carry out the step of revising coded signal in this encoder feedback ring inside.Therefore any correction of coded signal being carried out for adding the watermark purpose is fed and will be compensated in the subsequent encoding operation.
Although, will use aforesaid coding and watermark insertion method that the present invention is described,, the present invention is not limited thereto.
Fig. 5 shows according to of the present invention being used for and reproduces coded data and extract the device of additional data from the record carrier of light recordable-type.
The dish that has the light raadable mark 1 that is driven as shown in Figure 1 by 61 rotations of disc spins device rotates.Optical pick-up unit 62 usefulness are shone this dish 1 by for example beam that semiconductor laser produced.This beam or optical pick-up unit 62 are upwards moved in footpath at dish 1.With this beam along circular orbit 2 scanning disks 1.Detect by coiling 1 ray that is reflected and being converted into the detection of electrons signal by the radiativity sensitive detectors in the optical pick-up unit 62.Variation in this detection of electrons signal has reflected by what the optically detectable marks of dish on 1 responded to and has been detected modulation in the ray.This detection signal is offered first demodulating equipment 64 that is used to produce a focus control signal and a tracking error signal, and focus control signal and tracking error signal all are used to control optical pick-up unit 62.In addition, a speed control signal is offered disc spins device 61.Derive from detection signal by demodulating equipment 64 and to comprise for example sample frequency f
sSynchronizing signal.Except other signal, in demoder with this signal f
sBe used to the purpose of decoding.
First demodulating equipment 64 be applicable to also that detection is changed by described mark lengths and these marks between variation in the detection of electrons signal responded to of spatial variations.Fig. 1 b shows the arrangement of mark 4, and Fig. 1 c has described the example corresponding to detection of electrons signal 61.With the synchronizing signal S combination of the specified data clock period T that obtains, can from the detection of electrons signal, derive channels bits.Subsequently by first decoding device 65 use for example known from compact disk (CD) data processing the EFM demodulation method or use known EFM+ modulator approach from digital universal disc (DVD) data processing, channels bits is converted to data bit.Can also the use error treatment for correcting.Resulting data stream comprises sample frequency f in this stage
sThe word of 16 bit widths.In the situation of voice data,, use interpolation filter and use n.f as an example
sSample frequency the circulation of this long numeric data is changed to a binary data stream.This binary data stream is applied in 1 D/A converter 67, thereby this bit stream voice data is converted to original simulated audio signal D1 again.
According to the present invention, second demodulating equipment 68 is provided so that from by change except described mark lengths and these marks between the detection of electrons signal responded to of variation the spatial variations change derived information.These change such as, for example, as respectively in width, radial position or the change in depth shown in Fig. 1 d, Fig. 1 e and Fig. 1 f.If by tunable bandpass filter, this radial variations has shown another frequency range, then can from length variations, isolate radial position and change.Can isolate the degree of depth or wide variety similarly.The variation of another kind of type can appear, such as for example at the mark that extends in the radial direction of dish 1.
The signal that obtains from the detection signal by 68 demodulation of second demodulating equipment, sort signal for example can be the channels bits cell signal, and this signal comprises foregoing coded format descriptive information.Use second decoding device 69 with the data word of this information decoding as the presentation format descriptive information.Based on received format description information, this second decoding device 69 offers programmable decoder 70 with format description signal F.Use this signal F, by this way with 70 programmings of this programmable decoder: can therefrom extract according to corresponding format and be inserted into additional data in the bit stream.For this purpose, programmable decoder 70 receptions are from the decoding bit stream of first decoding device 65.
Use this format description signal F, thereby indication or programming programmable decoder 70 extract therefrom according to the additional data that is inserted into by the represented format description of signal F in the bit stream.This format description information F can comprise for be used for additional data encode used form a complete description or only be the part of this explanation.For example, as previously mentioned, this format description information F can only be which position of or a series of these bit streams of expression comprises the number of additional data figure place, and this programmable decoder 70 can be applicable to and handle these numerals.This format description information can also only comprise the part of total format description that decoding is required.In this case, can remainder be stored in second demoder 70 in advance.
Fig. 6 shows an embodiment of programmable decoder 70 among Fig. 5, and this demoder is used for extracting the watermark that is inserted from a delta modulation bit steam.Can be with the data input pin that is applied to such as the modified encoding bit stream BS ' that produces by first decoding device 65 by the register 80 of signals selected SEL institute timing.The output terminal of this register 80 is watermark pattern or other control data D2.Signals selected SEL determines which position of bit stream BS ' is the watermark position.This signal is produced by frequency divider stage 81, and this frequency divider stage 81 uses digital n with sample frequency f
sFrequency division, this numeral n for example can be by such as the format description signal F determined digital 100 that produces by second decoding device 70.Corresponding signal in this signals selected SEL and the pen recorder is synchronous.This synchronous by in watermark signal D2, providing predetermined synchronization bit pattern to obtain.In such an embodiment, synchronizing indicator 82 phase place that detects described patterns and change frequency divider stage 81 is up to detecting this synchronous mode.
Can in file D2, find to extract other specific embodiment of watermark data D2.Being noted that can be with the function combinations of some devices in a device, or even can skip some devices.For example, first decoding device 65 and decoding device able to programme 70 can be combined in the decoding device.In addition, in practice, can in a unit, arrange first and second demodulating equipments 64 and 68.
When being used as a home recorder with reference to figure 2 illustrated pen recorders and this register only writes down a so-called public watermark according to common format in bit stream, then can obtain another embodiment of transcriber.This device can all be done watermark at all dishes, and carries out the recording operation of family expenses.As described in reference to Figure 5 all, a corresponding reproducing device that combines with the identical recordings device can detect this public watermark, and this is because the form of this watermark is known.In contrast, can preserve so-called private watermark and its corresponding format so that official already delivers factually.
Substitute or except watermark information D 2, control information can be inserted among the bit stream BS ' that is encoded.Then, this control information can be used for controlling transcriber.
Fig. 7 shows a kind of method that is used for inserting at coded signal additional information according to the present invention.In first step 91 (1ST-DAT), receive such as the such first main data of video, audio frequency or conventional data.In step 93 (ENC-1ST-F), be to be applicable to record or the channel data that transmits with first digital coding according to first form such as the form that is used for CD or DVD.In step 92 (SUP-DAT), reception will be inserted into the additional data in the master data.In step 94 (2ND-F), produce second form, this second form is used as for revising first data that are encoded in the step 95 (MOD) so that additional data is inserted one of them regulation.In step 96 (ENG-3RD-F), also will it is characterized by second form or be encoded to channel data from the descriptive information of second a form part according to the 3rd form (this form can be identical with first form).Simultaneously, in step 97 (1ST-MOD), be to be suitable for being recorded on the specific recording medium or the signal that in transmission channel, transmits with corrected first data-modulated that is encoded according to first modulation treatment.In step 98 (2ND-MOD), also the second format description information that will encode according to the second different modulation treatment is modulated to the signal that is suitable for being recorded on the specific recording medium.In step 99 (W), by identical above-mentioned these two signals of recording processing record, this recording processing can be such as the photoscanning beam.Although can separately carry out these two kinds of recording processing or these two kinds handles even differs from one another.But, preferably, use identical recording processing because have such benefit: can use a kind of read to handle to carry out reproduce operation.
The embodiment that is noted that above-mentioned insertion additional data method only is an example.Under the situation that does not break away from essence of the present invention, can walk abreast or order is carried out some steps.
Although described the present invention with reference to its most preferred embodiment,, it being understood that these embodiment are not restrictive example.Therefore, to those skilled in the art, do not break away from such as in the claim under the situation of the scope of the invention the definition, various modification are obvious.Can realize the present invention by means of hardware and software, and some " devices " can be expressed as some part of hardware.In addition, the present invention also is present among each novel feature or these combination of features.Be also noted that word " comprises " does not get rid of other element or the step listed in claim.Any reference symbol can not limit the scope of claim.
The participate-reform file directory:
(D1) the european patent application sequence number 98900036.9, with applicant's name, (PHN16209)
(D2) European patent 706174
(D3) the european patent application sequence number 91203147.3), with applicant's name, (PHN13922).
Claims (10)
1. one kind such as the such disc-like record carrier of optically readable disc, thereby length and the mark on the space orbit direction by means of the type that has different physical characteristicss in relative its peripheral region carry out first modulation record first coded signal on this record carrier, wherein said mark is to be arranged on the circular orbit of this record carrier, wherein
First coded signal is represented to be inserted in wherein additional data according to first data of first form coding and according to second form, it is characterized in that
By means of or be different from second modulation of first modulation of described type mark, or use second type mark have different physical characteristicss for the first kind, second coded signal is recorded on the record carrier, wherein
Second coded signal is represented and is used for the relevant format description information of second form that additional data extracts.
2. according to a kind of disc-like record carrier of claim 1, it is characterized in that, use the described type mark that is subjected to first and second modulation treatment, write down first and second coded signals thereon.
3. according to a kind of disc-like record carrier of claim 2, it is characterized in that,
Second modulation comprises the modulation for the mark geometry that is in non-tangent direction.
4. according to a kind of disc-like record carrier of claim 3, it is characterized in that second modulation treatment comprises the mark width modulation.
5. according to a kind of disc-like record carrier of claim 1, it is characterized in that second modulation treatment comprises the mark that employing is extended on the radial direction of disc-like record carrier central area.
6. according to a kind of disc-like record carrier of claim 1, wherein first data are by the unit bits of encoded.
7. according to a kind of disc-like record carrier of claim 6, wherein first data are to carry out δ-Δ coding.
8. according to a kind of disc-like record carrier of claim 1, it is characterized in that,
First coded signal comprises according to the selected sampling of selected rule, wherein
Revise described sampling according to the sampling of additional data, and
Format description information comprises described selective rule.
9. according to a kind of disc-like record carrier of claim 6, it is characterized in that,
First coded signal comprises the counter-rotating sampling of first signal of the cell bit coding of selecting according to selected rule, and wherein the sampling period number between continuous sampling is represented the data of inserting, and
Format description information comprises described selective rule.
10. according to any disc-like record carrier among the claim 1-9, it is characterized in that additional data comprises and is applicable to that control uses reproducer to being recorded in the device control data of the data reproduction on the record carrier.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP99202163 | 1999-07-02 | ||
| EP99202163.4 | 1999-07-02 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00801809A Division CN1327585A (en) | 1999-07-02 | 2000-06-27 | Addition of watermark keys according to a flexible format |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1725345A true CN1725345A (en) | 2006-01-25 |
Family
ID=8240405
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00801809A Pending CN1327585A (en) | 1999-07-02 | 2000-06-27 | Addition of watermark keys according to a flexible format |
| CNA2005100791901A Pending CN1725345A (en) | 1999-07-02 | 2000-06-27 | Addition of watermark keys according to a flexible format |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00801809A Pending CN1327585A (en) | 1999-07-02 | 2000-06-27 | Addition of watermark keys according to a flexible format |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP1145241A2 (en) |
| JP (1) | JP2003504775A (en) |
| KR (1) | KR20010074868A (en) |
| CN (2) | CN1327585A (en) |
| AU (1) | AU6821400A (en) |
| BR (1) | BR0006884A (en) |
| CA (1) | CA2342913A1 (en) |
| IL (1) | IL141712A0 (en) |
| WO (1) | WO2001003136A2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6449380B1 (en) * | 2000-03-06 | 2002-09-10 | Intel Corporation | Method of integrating a watermark into a compressed image |
| CN101188116A (en) | 2003-01-23 | 2008-05-28 | Lg电子株式会社 | Recording medium and apparatus and methods for forming, recording, reproducing and restricting reproduction of the recording medium |
| BRPI0405623A (en) * | 2003-01-23 | 2005-03-01 | Lg Eletronics Inc | Recording medium with copy protection information formed from intermittent or alternating oscillating holes and apparatus and methods for forming, recording and reproducing the recording medium |
| EP1590804B1 (en) | 2003-01-24 | 2014-07-09 | Intrinsic ID B.V. | Reliable storage medium access control method and device |
| DE102004021404B4 (en) * | 2004-04-30 | 2007-05-10 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Watermark embedding |
| CN101273365A (en) | 2005-09-30 | 2008-09-24 | Nxp股份有限公司 | Watermarking of a processing module |
| US20080291801A1 (en) * | 2005-11-29 | 2008-11-27 | Koninklijke Philips Electronics, N.V. | Record Carrier with Copy Protection Means |
| US8050166B1 (en) * | 2010-05-07 | 2011-11-01 | General Electric Company | System and method for improved data storage |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0930614B1 (en) * | 1991-12-02 | 2004-03-31 | Philips Electronics N.V. | Closed information system with physical copy protection |
| CN1126078C (en) * | 1994-04-18 | 2003-10-29 | 松下电器产业株式会社 | Method and apparatus for preventing illegal copying and illegal installation of information on optical recording medium |
| TW309612B (en) * | 1994-09-22 | 1997-07-01 | Nippon Bickter Kk | |
| PL329943A1 (en) * | 1997-01-27 | 1999-04-26 | Koninkl Philips Electronics Nv | Method of entering additional data into an encoded signal |
| JP4064506B2 (en) * | 1997-09-17 | 2008-03-19 | パイオニア株式会社 | Digital watermark superimposing method, detecting method and apparatus |
-
2000
- 2000-06-27 CN CN00801809A patent/CN1327585A/en active Pending
- 2000-06-27 JP JP2001508454A patent/JP2003504775A/en not_active Withdrawn
- 2000-06-27 IL IL14171200A patent/IL141712A0/en not_active IP Right Cessation
- 2000-06-27 WO PCT/EP2000/005961 patent/WO2001003136A2/en active IP Right Grant
- 2000-06-27 CA CA002342913A patent/CA2342913A1/en not_active Abandoned
- 2000-06-27 EP EP00956157A patent/EP1145241A2/en not_active Withdrawn
- 2000-06-27 BR BR0006884-5A patent/BR0006884A/en not_active IP Right Cessation
- 2000-06-27 AU AU68214/00A patent/AU6821400A/en not_active Abandoned
- 2000-06-27 KR KR1020017002604A patent/KR20010074868A/en active IP Right Grant
- 2000-06-27 CN CNA2005100791901A patent/CN1725345A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CA2342913A1 (en) | 2001-01-11 |
| WO2001003136A3 (en) | 2001-05-03 |
| IL141712A0 (en) | 2002-03-10 |
| AU6821400A (en) | 2001-01-22 |
| EP1145241A2 (en) | 2001-10-17 |
| CN1327585A (en) | 2001-12-19 |
| BR0006884A (en) | 2001-10-30 |
| KR20010074868A (en) | 2001-08-09 |
| WO2001003136A2 (en) | 2001-01-11 |
| JP2003504775A (en) | 2003-02-04 |
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