CN100468554C - Optical storage medium, information-recording device, and information-reproducing device - Google Patents

Abstract

An optical storage medium can be provided by which illegal usage of the optical storage medium involving an infringement on the copyright can be prevented effectively without impairment of the functions for reproducing physical format information and optical storage medium manufacturing information. The optical storage medium includes a main information region in which encrypted data information is recorded as a pit row that is capable of being read out by means of light and a control data region. In the control data region, key information for decoding the encryption of the data information, the physical format information and the optical storage medium manufacturing information are recorded by wobbling a groove.

Description

Optical storage media, information record carrier and information reproduction apparatus

The present invention is dividing an application of No. the 03147130.7th, Chinese patent application.

Technical field

The present invention relates to a kind of optical storage media and reach the information recording/reproducer that this optical storage media is carried out recording of information or reproduction, especially relate in order to protect the works thing tracer signals such as image or sound not to be encrypted the optical storage media of laggard line item and the information recording/reproducer that these medium is carried out recording of information or reproduction by bootlegging.

Background technology

With DVD (Digital Versatile/Video Disc) is the medium of the CD of representative as the large capacity digital data of record AV (Audio Visual) data or computing machine etc., is extensively popularized.Sell after for example writing down the high-quality dynamic image more than two hours.In order to prevent that this copyright from unlawfully being copied in other recording medium, adopt the mode (for example with reference to non-patent literature 1) that content (contents) is encrypted that is called.

Under this mode, use 3 layers privacy key (title key, dish key, master key) to encrypt compressed copyrights such as film, and record in the user area of user-accessible.Most important master key in the privacy key only is notified to licensed regular manufacturer, and encrypts each DVD and essential dish key and the title key of each title, be stored in the control information zone that the user can not visit according to master key.Thereby, because limited subscriber is to the visit of the essential privacy key of decoding, so can not carry out illegal copies such as document copying.But, this technology can not deal with will comprise the content of Zone Full in control information zone of record privacy key, the unlawfully illegal act of exact copy in other CD.

Therefore, propose following method: shown in Figure 53, is the special pit row (Figure 53 B) that unit (Figure 53 A) makes the record mark displacement that is recorded in the CD by record with the frame along radial direction, and judgement is regular CD or the CD of illegal copies (for example patent documentation 1).

Can detect the existence of this special pit row by the colour synchronisation TE signal (Figure 53 D) that generates by trail-and-error signal (Figure 53 C).Therefore, the consistent frame number of signal level in the inner reference signal that takes place of counting and the colour synchronisation TE signal, and discern regular medium or the medium that duplicate according to count value.

Like this, even make the CD of record mark, in the CD of copy, can not generate special pit to the radial direction displacement by the usual way copy.Therefore, can judge the CD of illegal copies.

But, by making pit row swing and record, the allowed band of offset track is narrowed down the reliability step-down of optical storage media and information reproduction apparatus.In order to ensure reliability, the track space of record pit row must be enlarged and the corresponding part of swing, the problem that exists recording capacity to descend.

In addition, in above-mentioned prior art, because only judge regular dish, so, then can be listed as and carry out illegal copies by generate any special pit in this position if know the location of special pit according to the existence of special pit.Thereby not licensed illegal disc wright may hinder the suitable circulation of digital content by a large amount of copyrights of making copy.

Summary of the invention

Make the present invention in order to solve above-mentioned existing issue, its purpose be to provide a kind of do not make recording capacity reduce, can correctly discern optical storage media, and can effectively prevent to be accompanied by literary property the illegal use optical storage media of infringement optical storage media and this optical storage media carried out recording of information, used information recording/reproducer again.

To achieve these goals, the 1st information reproduction apparatus of the present invention reproduces main information to follow the frame unit of synchronous code according to the record mark that forms in the CD, it is characterized in that: have: radial phase difference test section, the radial displacement of detection record mark; The clock extracting part extracts and this reproducing signal synchronization basic standard clock signal from the reproducing signal of described record mark; The reproducing signal handling part detects described synchronizing signal, the described reproducing signal of demodulation from described reproducing signal; Facies relationship column-generation portion, generating with the timing that detects described synchronizing signal is the relevant series of benchmark; With secondary information test section, radial phase difference signal and described relevant series by being generated by described radial phase difference test section detect secondary information.

To achieve these goals, the 2nd information reproduction apparatus of the present invention is characterised in that: also possess: light picker, to the optical storage media irradiates light, in this optical storage media, master data information after encrypting is recorded in the main information region, by make flag column or with respect to the recessed or protruding ditch of light incident side to radially displacement, but record comprises the optical storage media information of the identifying information of optical storage media that the key information of deciphering described master data information or expression be regular manufacturing or information reproduction in the control data zone, and reads master data information and the optical storage media information that writes down in the described optical storage media; The key information detection part according to the signal that described light picker reads, detects described key information; With the demodulation parts,, decipher described master data information according to the detected key information of described key information detection part.

To achieve these goals, the 3rd information record carrier of the present invention is with the frame unit of appended synchronization sign indicating number, write down main information by record mark that can be optically read is next to optical storage media, it is characterized in that: have: modulation portion, in the described main information of modulation, insert synchronous code at every predetermined distance place; The displacement control signal generating unit is a benchmark with the timing of inserting described synchronous code, generates displacement control signal; With secondary information recording part, write down secondary information to outer circumferential side or interior all side displacement trace by make described record mark by described displacement control signal.

To achieve these goals, the 1st optical storage media of the present invention possesses information recording layer, and this information recording layer has main information region, and recorded information is as the recessed or protruding flag column that can read through light; With the control data zone, it is characterized in that: by the swing ditch recessed or protruding with respect to light incident side, record is about the optical storage media information of this optical storage media in described control data zone.

To achieve these goals, the 2nd optical storage media of the present invention possesses information recording layer, and this information recording layer has main information region, and recorded information is as the flag column that can read through light; With the control data zone, it is characterized in that: by the swing flag column, record is about the optical storage media information of this optical storage media in described control data zone.

To achieve these goals, the 3rd optical storage media of the present invention possesses information recording layer, and this information recording layer has main information region, and recorded information is as the flag column that can read through light; With the control data zone, it is characterized in that: by flag column, in described control data zone, write down optical storage media information about this optical storage media, the flag column of recorded in wobbles in described main information region, establishing track space is Tp ₂The time, the peak swing of the displacement of swing is less than Tp ₂/ 30.

To achieve these goals, the 4th optical storage media of the present invention is characterised in that: possess a plurality of information recording layers, this information recording layer has main information region, and recorded information is as the flag column that can read through light; With the control data zone, record is about the optical storage media information of this optical storage media, and record is about the optical storage media information of all information recording layers in the control data zone of arbitrary information recording layer of described a plurality of information recording layers.

To achieve these goals, the record mark of the 5th medium of the present invention by can be optically read, write down main information with the frame unit that follows synchronous code, it is characterized in that: with regard to partial frame at least, by on the position of the position of the outer circumferential side displacement trace of optical storage media or inside all side displacement trace, forming described record mark in the relative standard position, the secondary information of record in not writing down the part of described synchronous code.

Description of drawings

Fig. 1 is the structural representation of the optical storage media of the expression embodiment of the invention 1.

Fig. 2 amplifies the control data zone of optical storage media shown in the presentation graphs 1 and the mode chart that main information region has a common boundary.

Fig. 3 is the structural representation of the information reproduction apparatus of the expression embodiment of the invention 2.

Fig. 4 represents the structural representation of the optical storage media of the embodiment of the invention 3.

Fig. 5 is the mode chart that control data is regional and main information region has a common boundary that amplifies the optical storage media of the expression embodiment of the invention 4.

Fig. 6 is the wobble pits of optical storage media of the expression embodiment of the invention 4 and the mode chart of digital signal.

Fig. 7 is the wobble pits of optical storage media of the expression embodiment of the invention 5 and the mode chart of digital signal.

Fig. 8 is the wobble pits of optical storage media of the expression embodiment of the invention 6 and the mode chart of digital signal.

Pit cross section in Fig. 9 modal representation optical storage media (a) is the sectional view of representing the cross section of pit is formed ideal rectangle shape situation, (b) is the sectional view that expression forms the cross section of pit the trapezoidal shape situation.

Figure 10 is the photodetector of the expression information reproduction apparatus that constitutes the embodiment of the invention 2 and the mode chart of differential operational portion.

Figure 11 is the photodetector of the expression information reproduction apparatus that constitutes the embodiment of the invention 7 and the mode chart of wobble signal detection portion.

Figure 12 is the mode chart of the information format that writes down in the information recording layer of the optical storage media 4 that uses in the information reproduction apparatus of the expression embodiment of the invention 7.

Figure 13 is the weave mode that writes down in the information recording layer of the optical storage media 4 that uses in the information reproduction apparatus of the embodiment of the invention 7.

Figure 14 is other weave mode that writes down in the information recording layer of the optical storage media 4 that uses in the information reproduction apparatus of the embodiment of the invention 7.

Figure 15 is the schematic diagram of record mark shape of the CD of expression embodiment 8.

Figure 16 is the schematic diagram of the secondary recording of information form of expression embodiment 8.

Figure 17 is the schematic diagram of the record mark of secondary information bit [0] of the record of expression embodiment 8 and secondary information bit [1].

Figure 18 is the schematic block diagram of the information record carrier of embodiment 8.

Figure 19 is the figure of the randomizer details of expression information record carrier of the present invention, information reproduction apparatus.

Figure 20 is the detailed diagram of the XOR of embodiment 8.

Figure 21 is the detailed diagram of the radial modulation device of embodiment 8,9.

Figure 22 is the time diagram of the information record carrier by embodiment 8 when writing down secondary information bit [0].

Figure 23 is the time diagram of the information record carrier by embodiment 8 when writing down secondary information bit [1].

Figure 24 is the time diagram of the coherent detection enabling signal of the displacement enabling signal of information record carrier of the present invention and information reproduction apparatus.

Figure 25 is the schematic block diagram of the information reproduction apparatus of embodiment 8.

Figure 26 is the detailed diagram of reproduction head of the information reproduction apparatus of embodiment 8.

Figure 27 is the detailed diagram of secondary information detector of the information reproduction apparatus of embodiment 8.

Figure 28 is the time diagram of the information reproduction apparatus of embodiment 8 when detecting secondary information bit [0].

Figure 29 is the time diagram of the information reproduction apparatus of embodiment 8 when detecting secondary information bit [1].

Figure 30 is the time diagram of the level integrator integrated value in the secondary information detector of information reproduction apparatus of expression embodiment 8.

Figure 31 is the schematic diagram of secondary information record format of the CD of expression embodiment 9.

Figure 32 is the schematic diagram of the record mark of secondary information bit [0] of the record of expression embodiment 9 and secondary information bit [1].

Figure 33 is the schematic block diagram of the information record carrier of embodiment 9.

Figure 34 is the detailed diagram of specific phase coding demodulator in the information record carrier of embodiment 9 and the information reproduction apparatus.

Figure 35 is the time diagram of specific phase coding demodulator operation in the information record carrier of embodiment 9 and the information reproduction apparatus.

Figure 36 is the schematic block diagram of the information reproduction apparatus of embodiment 9.

Figure 37 is the detailed diagram of secondary information detector of the information reproduction apparatus of embodiment 9.

Figure 38 is the time diagram of the level integrator integrated value transition in the secondary information detector of information reproduction apparatus of expression embodiment 9.

Figure 39 is the schematic block diagram of the information record carrier of embodiment 10.

Figure 40 is the block diagram of the timing generator of embodiment 10.

Figure 41 is the time diagram of the information record carrier of embodiment 10.

Figure 42 is the schematic block diagram of the information record carrier of embodiment 11.

Figure 43 is the block diagram of the timing generator of embodiment 11.

Figure 44 is the time diagram of the information record carrier of embodiment 11.

Figure 45 is the schematic block diagram of the information record carrier of embodiment 12.

Figure 46 is the time diagram of the information record carrier of embodiment 12.

Figure 47 is the block diagram of the modulation signal maker of embodiment 12.

Figure 48 is the schematic diagram of the secondary information record format of expression embodiment 13.

Figure 49 is the key diagram that the secondary information record swing of expression embodiment 14 generates.

Figure 50 is the schematic block diagram of the information record carrier of embodiment 14.

Figure 51 is the schematic block diagram of the information reproduction apparatus of embodiment 10.

Figure 52 is the schematic block diagram of the information reproduction apparatus of embodiment 11.

Figure 53 is the schematic diagram of the record mark state of the existing CD of expression.

Embodiment

In the 1st optical storage media of the present invention, at the recessed or protruding ditch of light incident side, record is about the optical storage media information of this optical storage media in the control data zone by swing (ウ オ PVC Le).So-called optical storage media information except that physical format information and optical storage media manufacturing information, also comprises key information that the data message of encrypted record in the decoding main information region uses etc.Therefore, can provide a kind of optical storage media, swing the recording light media information, can not reduce recording capacity, and can correctly discern each medium by in the control data zone, making ditch.In addition, because write down the optical storage media information that comprises key information, so in other optical storage media, be difficult illegally with this optical storage media information reproduction by ditch is swung.Thus, the literary property that can effectively prevent companion data information is by infringement and illegal use optical storage media.

In the 2nd optical storage media of the present invention, by swing flag column in the control data zone, record is about the optical storage media information of this optical storage media.So-called optical storage media information comprises physical format information and optical storage media manufacturing information etc.Therefore, can provide a kind of optical storage media, come recording light media information in the control data zone, can not reduce recording capacity, and can correctly discern each medium by making the flag column swing.In addition, because make flag column swing laggard line item, so in other optical storage media, be difficult illegally with this optical storage media information reproduction.

In addition, the 3rd optical storage media can prevent bootlegging by the flag column of swing main information region.And, be Tp by establishing track space ₂The time, the peak swing of the displacement of swing is less than Tp ₂/ 30, can ignore the influence of cross-talk (Network ロ ス ト-Network) fully.

The 4th optical storage media passes through to write down the optical storage media information about all information recording layers in the control data zone of arbitrary information recording layer of a plurality of information recording layers, if the control data zone of the arbitrary information recording layer of visit then can obtain the optical storage media information about all information recording layers.Thus, learning time can be shortened.

According to information reproduction apparatus of the present invention, make the optical storage media information of swinging laggard line item by from the control data zone, reading with respect to the recessed or protruding ditch of light incident side or flag column, can correctly discern each medium.In addition, detected key information carries out information regeneration from optical storage media information by using, and can effectively prevent to follow literary property by infringement and illegal use optical storage media.In addition, information reproduction apparatus of the present invention is not limited to reproduce special machine, much less, also comprises the device with writing function etc.

In the 1st or the 2nd optical storage media, the information that is recorded in the described main information region preferably is recorded as the flag column recessed or protruding with respect to light incident side.Be recorded in main information region and the control data zone by row that information is all served as a mark, the forming pressure in the time of can reducing to make optical storage media, this is because can reduce the cost of forming machine.And, preferably swing flag column.Thus, can prevent bootlegging really.

In the 2nd optical storage media, be recorded in the preferably recessed or protruding flag column of flag column in the described main information region with respect to light incident side.

In the 2nd or the 3rd optical storage media, the track space in establishing the control data zone is Tp ₁, the mark amplitude is Mw ₁The time, preferably concern

0.3×Tp ₁≦Mw ₁≦0.7×Tp ₁

Set up.Even this is because under the situation that produces mark amplitude making error, also can reduce the influence to the optical storage media information of record.

In the 2nd or the 3rd optical storage media, be Mw when establishing the mark amplitude that is recorded in the control data zone ₁, the mark amplitude that is recorded in the main information region is Mw ₂The time, preferably concern

Mw ₁>Mw ₂

Set up.This is because the information that just is recorded in the main information region all can obtain good signal with the information both sides that are recorded in the control data zone.In addition, in this constituted, the track space in establishing main information region was Tp ₂, the mark amplitude is Mw ₂The time, preferably concern

Mw ₂<0.5×Tp ₂

Set up.Even this is because under the situation that produces mark amplitude making error, also can reduce the influence to reproducing signal.

In the 2nd or the 3rd optical storage media, the displacement of swing is preferably in the timing in the space in the flag column and carries out.By make the swing displacement at space segment, be difficult to be subjected to the influence of cutter edge (cutting margin), well detection signal.And, preferably have the map table that operation of recording that a plurality of fine settings write down the device of described flag column is used, be made as the timing in the space in the flag column with displacement that will swing.Thus, can suitably adjust the displacement timing of swing, prevent that shake from worsening.

In the 2nd or the 3rd optical storage media, the information that is recorded in the control data zone is preferably represented by the edge part of mark.This is because can guarantee and the same S/N of situation that makes continuous ditch swing, so can the information of reliability highland detection record in the control data zone.In addition, in the 2nd optical storage media, the information that is recorded in the control data zone is preferably represented by the central part of mark.This is because the influence of shake is little, can detect the information that is documented in the control data zone in the reliability highland.

In the 2nd or the 3rd optical storage media, the synchronous mode that best flag column is used when specific period has information reproduction is swung synchronously with described synchronous mode.This is because can generate clock signal according to flag column, even but under the little situation of oscillating quantity also stable detection signal.

In said structure, being preferably in the cycle of establishing 1 synchronous mode is Cy ₁, be Cy hunting period ₂The time, relation

Cy ₂=Cy ₁* M/2 (M is a natural number) or

Cy ₁=Cy ₂* M/2 (M is a natural number)

Set up.According to this best structure, can avoid the influence of bit stream.In addition, under the situation that the latter's relation is set up, timing detection signal that can synchronous mode.

In the 2nd or the 3rd optical storage media, be ML when establishing the mark lengths that is recorded in the control data zone ₁, the light wavelength of shining during described mark at record is the numerical aperture of the optical system of λ, irradiates light when being NA, best relation

ML ₁≧2×λ/NA

Set up.This is because when generating clock signal, even do not use balanced device, also can obtain the enough big signal of amplitude.

In the 2nd or the 3rd optical storage media, be ML when establishing the mark lengths that is recorded in the control data zone ₁, the light wavelength of shining during described mark at record is the numerical aperture of the optical system of λ, irradiates light when being NA, best relation

ML ₁≧λ/(2×NA)

Set up.This is because can use the signal that obtains according to repeating label and space to generate clock signal.

In the 2nd or the 3rd optical storage media, the mark and the space length separately that are recorded in the control data zone are standard with the period T of regulation preferably, are the integral multiple of this period T.And mark and space preferably have single length or multiple length respectively.

In the 1-3 optical storage media, the information that preferably is recorded in the main information region is data encrypted information, and described optical storage media information comprises the key information that the described data message of decoding is used.According to this structure, can effectively prevent to follow the infringement of literary property and illegal use optical storage media.In addition, preferably come recording key information by swinging recessed or protruding ditch or flag column.Preferably represent key information by the central part of swing.In addition, in the 1-the 3 optical storage media, also can replace above-mentioned key information, but and to comprise expression be the optical storage media of regular manufacturing or the also identifying information of information reproduction.

In the 1-3 optical storage media, the length that can be compared to a pair of mark and space hunting period most is long.This is because the influence that can alleviate adjacent orbit.Hunting period is more preferably greater than 4 times of a pair of mark and space length.

In the 1-3 optical storage media, be standard with the period T of regulation hunting period preferably, is the integral multiple of this period T.This is can to detect by the optical storage media information of wobble modulations from the clock signal of mark and space generation repeatedly because can use.

In the 1-the 3 optical storage media, be Md when establishing the mark that is recorded in the control data zone or the optical depth of ditch ₁, when the light wavelength of shining when record described mark or ditch is λ, best relation

λ/8≦Md ₁≦λ/4

Set up.This is because can obtain high-quality signal.

In the 1-3 optical storage media, the hunting frequency in the described control data zone is the high frequency of the servo frequency domain of comparison-tracking preferably.

In the 1-3 optical storage media, swing is preferably in does not have DC component in the tracking servo frequency domain.This is because can carry out tenacious tracking.

In the 1-3 optical storage media, the timing of swing displacement is preferably simulated at random.This is because decoding becomes more difficult.

In the 1-3 optical storage media, preferably to a plurality of swings of 1 Bit Allocation in Discrete of key information.This is because there is not DC component when input, and can delete low frequency component, improves S/N.

In the 1-3 optical storage media, key information is preferably by discrete or continuous recording.If discrete record then helps improving the difficulty of decoding, if continuous recording, then because read the required time shortening, so help reducing the period of reservation of number when reproducing.

In the 1-3 optical storage media,, has the buffer area that to read also harmless ditch or mark even preferably be provided with in the boundary of control data zone with main information region.This ditch or flag column are preferably recessed or protruding with respect to light incident side.Even this is because also can obtain the measured tracking error signal of matter in the boundary of control data zone and main information region thus.

In the 1st or the 2nd optical storage media, the track space Tp in best control data zone ₁Track space Tp with main information region ₂Different.In addition, the track space Tp in best control data zone ₁Track space Tp than main information region ₂Greatly.This is because with regard to control data zone and main information region, can obtain measured reproducing signal of matter and tracking error signal.

The 1-3 optical storage media preferably possesses a plurality of described information recording layers, recorded information in the main information region of at least one information recording layer of described a plurality of information recording layers, as recessed or protruding flag column, record is about the optical storage media information of all information recording layers in the control data zone of at least one information recording layer of described a plurality of information recording layers.Thereby, if described 1 information recording layer of visit, then because of the optical storage media information that can obtain, so can shorten learning time about all information recording layers.

In described the 1-the 3 optical storage media or the 4th optical storage media that possesses a plurality of information recording layers, be preferably in each control data zones of described a plurality of information recording layers record about the optical storage media information of all information recording layers.This is because no matter focus on which information recording layer, can both read the optical storage media information about all information recording layers, can correctly discern optical storage media.

In described the 1-the 3 optical storage media or the 4th optical storage media that possesses a plurality of information recording layers, be preferably in the control data zone in the key horizon of this optical storage media record about the optical storage media information of all information recording layers.

In described the 1-the 3 optical storage media or the 4th optical storage media that possesses a plurality of information recording layers, be preferably in the control data zone in one decks at least of described a plurality of information recording layers record about the information of the tracking error signal polarity of described a plurality of information recording layers.Preferably will be recorded in the control data zone in all information recording layers of control data zone in the key horizon of this optical storage media or this optical storage media about the information of described tracking error signal polarity.This is because when the playback light medium, can shorten the time of study tracking error signal polarity.

In described the 1-the 3 optical storage media or the 4th optical storage media that possesses a plurality of information recording layers, be preferably in the control data zone in one decks at least of described a plurality of information recording layers record about in order to record the information in described a plurality of information recording layer and the recording layer information of the surface configuration that forms.So-called described recording layer information is the expression paired domination number according to the information record form in zone for to the information of one of the recessed ditch of light incident side, protruding ditch, concave label or protruding mark etc.In addition, described recording layer information preferably comprises the information about the described surface configuration degree of depth.

The the 1-the 4 optical storage media is to have to reproduce tailored version, write in type and the rewriting type optical storage media that at least two kinds of information recording layers are used as described information recording layer troactively, described optical storage media information is recorded on the roughly the same radial location in control data zone.This structure helps shortening the time of study tracking error signal polarity when the playback light medium.

Described information reproduction apparatus preferably also is provided with decision means, according to the testing result of described key information detection part, and the described optical storage media that judged whether bootlegging; Forbid parts with reproduction, when described decision means is judged as the optical storage media that will reproduce by bootlegging, forbid information reproduction from described optical storage media.This is because can effectively get rid of illegal duplicating thus.

In addition, in information reproduction apparatus of the present invention, described reproduction forbids that parts preferably stop output signal from described demodulation parts.Perhaps, the preferably described optical storage media with reproduction of discharge from this information reproduction apparatus of parts is forbidden in described reproduction.And, preferably also possess alarm features, when described decision means is judged as the optical storage media that will reproduce by bootlegging, warn this optical storage media by bootlegging.This be because by these structures can more certain eliminating optical storage media by bootlegging.

Information reproduction apparatus of the present invention preferably uses to have and reproduces tailored version, writes in type and the rewriting type at least two kinds of information recording layers troactively and with common modulation system the optical storage media that described optical storage media information is recorded on the common location of control data zone is used as described optical storage media.This is because can realize can preventing from the optical storage media with polytype information recording layer is carried out the information reproduction apparatus of bootlegging thus.

Information reproduction apparatus of the present invention does not detect under the situation of described key information at described key information detection part, if detect reproducible identification code in the signal that can read according to described light picker from optical storage media, then described decision means is judged as optical storage media not by bootlegging.This is needn't forbid the information of duplicating because can prevent overprotection, and can guarantee user convenience.

The swing detection parts that are used for the wobble detection signal in the information reproduction apparatus of the present invention are differential operational parts or phase place comparing unit preferably.If use the differential operational parts, then can simplify the structure of detection system.If use the phase place comparing unit, then because be not subjected to the influence of DC component, so can improve reliability.

Information reproduction apparatus of the present invention preferably uses the signal that obtains from a plurality of swings to come the demodulation key information.This is because can improve reliability.In addition,, then can reduce wobble amplitude, reduce the influence of cross-talk if it is many to be used to obtain the swing quantity of key information.

Information reproduction apparatus of the present invention preferably adds up average behind the signal of swing detection parts output, decoding key information.In addition, the multiplication number of times is many more, then can improve S/N more, can improve the reliability of the key information that reads more.

Information reproduction apparatus of the present invention preferably uses the signal that obtains from flag column to generate clock signal, and uses described clock signal to come detection key information.But this is because the stable detection signal.

Information reproduction apparatus of the present invention preferably uses the signal that obtains from flag column for demodulation and generates clock signal from the signal that flag column obtains, and uses described clock signal to come detection key information.This is because can simplify circuit structure.

In the 5th medium, preferably do not exist in the described record mark from the displacement of the inside all sides of outer circumferential side or from the displacement of interior all side direction outer circumferential sides.

In the 5th medium, described record mark is preferably in the radial displacement of the optical storage media permission of not writing down described secondary information to displacement radially.

In the 5th medium, preferably the record mark by making a plurality of described frames writes down 1 bit of described at least secondary information to microdisplacement radially.Described a plurality of frame preferably be configured in continuously on the described optical storage media track the frame group or with predetermined distance arranged discrete frame group in orbit.

In the 5th medium, in the specific region in particular frame and/or frame, preferably there is not described microdisplacement radially.

In the 5th medium, by described record mark to the guidance field in the optical storage media preferably, zone that radially microdisplacement writes down secondary information.

The 5th medium is a plurality of that the part that will not write down described synchronous code in the described frame is divided into the length inequality, in described each piece, make record mark different with the cycle of interior all side displacement trace to outer circumferential side, and, the record mark length of inside all side displacements and the described optical storage media of length claim 65 about equally in each piece to the record mark of outer circumferential side displacement.And, be preferably in inside all side displacements in all frames record mark length summation with to the summation of the record mark length of outer circumferential side displacement about equally.

In the 5th medium, preferably the part that does not write down described synchronous code in the described frame is divided into a plurality of of specified length, in described each piece, make record mark different with the cycle of interior all side displacement trace to outer circumferential side, in each piece the summation of the record mark length of inside all side displacements with to the summation of the record mark length of outer circumferential side displacement about equally.

In the 5th medium, preferably the part that does not write down described synchronous code in the described frame is divided into n (n is the natural number greater than 4) piece of specified length, every m (m be n 1 beyond approximate number) in described, make record mark different with the cycle of interior all side displacement trace to outer circumferential side, and, in each piece the summation of the record mark length of inside all side displacements with to the summation of the record mark length of outer circumferential side displacement about equally.

In the 5th medium, preferably be recorded in the frame that does not write down described secondary information by making record mark will reproduce described secondary information information necessary to outer circumferential side and interior all side displacement trace.The essential information of the so-called described secondary information of reproduction for example is the error correcting code of secondary information etc.

The 5th medium is preferably determined record mark displacement to outer circumferential side and interior all sides according to making fake information overlap signal on the described secondary information.

In information record carrier of the present invention, preferably do not carry out microdisplacement to radially to inserting synchronous code in the described frame unit at least.

In information record carrier of the present invention, described displacement control signal is preferably by coming the signal of the secondary information of frequency spectrum diffusion in the initialized simulation random number of the timing series of inserting described synchronous code.

In information record carrier of the present invention, described displacement control signal preferably makes described record mark to the displacement probability of outer circumferential side and the displacement probability phase encoding modulation about equally of inside all sides.

In information record carrier of the present invention, described displacement control signal is preferably in and makes described record mark about equally the time, not have the change point of described displacement control signal to the displacement probability of the displacement probability of outer circumferential side and inside all sides in the interval that forms record mark.

In information record carrier of the present invention, best 1 bit with the described at least secondary information of a plurality of frame unit records.Described a plurality of frame preferably be configured in continuously on the optical storage media track the frame group or with predetermined distance arranged discrete frame group in orbit.

In information record carrier of the present invention, preferably the part that does not write down described synchronous code in the described frame is divided into a plurality of of length inequality, in described each piece, make record mark different with the cycle of interior all side displacement trace to outer circumferential side, and, in each piece the record mark length of inside all side displacements with to the length of the record mark of outer circumferential side displacement about equally.

In information record carrier of the present invention, the summation of the record mark length of inside all side displacements in all frames with to the summation of the record mark length of outer circumferential side displacement about equally.

In information record carrier of the present invention, preferably the part that does not write down described synchronous code in the described frame is divided into a plurality of of specified length, in described each piece, make record mark different with the cycle of interior all side displacement trace to outer circumferential side, in each piece the summation of the record mark length of inside all side displacements with to the summation of the record mark length of outer circumferential side displacement about equally.

In information record carrier of the present invention, preferably the part that does not write down described synchronous code in the described frame is divided into n (n is the natural number greater than 4) piece of specified length, every m (m be n 1 beyond approximate number) in described, make record mark different with the cycle of interior all side displacement trace to outer circumferential side, and, in each piece the summation of the record mark length of inside all side displacements with to the summation of the record mark length of outer circumferential side displacement about equally.

In information record carrier of the present invention, preferably be recorded in the frame that does not write down described secondary information by making record mark will reproduce described secondary information information necessary to outer circumferential side and interior all side displacement trace.

In information record carrier of the present invention, preferably determine record mark displacement to outer circumferential side and interior all sides according to making fake information overlap signal on the described secondary information.

In the 2nd information reproduction apparatus of the present invention, preferably be modulated at the initialized simulation random number of the timing series that detects described synchronous code and generate described relevant series by phase encoding.

In the 2nd information reproduction apparatus of the present invention, described relevant series is preferably in the interval of reproducing described record mark does not have change point.

In the 2nd information reproduction apparatus of the present invention, preferably extract the described secondary information of at least 1 bit by reproducing a plurality of described frames.

In the 2nd information reproduction apparatus of the present invention, preferably do not detect secondary information the synchronous code in described at least frame.

Below, the embodiment of optical storage media of the present invention and information recording/reproducer is described with reference to accompanying drawing.In addition, identical symbolic representation same structure key element or same effect, action among each figure.

(embodiment 1)

Fig. 1 is the figure of structure one example of expression optical storage media of the present invention.Primary storage medium 41 have control data zone 41a and main information region 41b.In main information region 41b, flag column is registered as pit, so that by the data message after the light reading encrypted.On the other hand, in the 41a of control data zone, write down and comprising the optical storage media information that decoding is recorded in the key information that the data message among the main information region 41b uses by groove being carried out wobble frequency (wobbling).In addition, in optical storage media information, except that described key information, also comprise physical format information and optical storage media manufacturing information etc.

Linear velocity when the information of record in the playback light medium 41 is when being about 5m/s, and hunting frequency is about 1MHz, modulates with the sufficiently high frequency of the servo frequency domain of comparison-tracking.With wavelength X is that the numerical aperture of 400-420nm, object lens is the information that the light picker (pickup) of 0.8-0.9 reads record in the optical storage media 41.

Fig. 2 amplifies the main information region 41b of expression optical storage media 41 and near the planimetric map of the state in boundary of control data zone 41a.Here, establish track space (trackpitch) Tp of control data zone 41a ₁Be 0.35 micron, the track space Tp of main information region 41b ₂It is 0.32 micron.That is the track space Tp of control data zone 41a, ₁Track space Tp than main information region 41b ₂Wide.This is that any of the tracking error signal that uses when reading the information that writes down among the 41a of control data zone of reproducing signal, (4) when reading the information that writes down among the 41a of control data zone, reproducing signal, the tracking error signal that uses when (2) read the information that writes down among the main information region 41b, (3) when (1) is read the information that writes down among the main information region 41b all can obtain good quality.

On the viewpoint of signal quality, the quality of the reproducing signal when reading the information that writes down among the main information region 41b, the degree of depth of pit is λ/4 o'clock the bests when forming ideal rectangle in the cross section of pit.In addition, if detect tracking error signal by phase difference method, the quality of used tracking error signal is λ/4 o'clock the bests in the degree of depth of pit also when then reading the information that writes down among the main information region 41b.On the other hand, because reproducing signal when reading the information that writes down among the 41a of control data zone and the tracking error signal that uses when reading the information that writes down among the 41a of control data zone all detect by the method for recommending of carrying out differential operational, so the degree of depth of ditch is that λ/8 are o'clock the best in quality when forming ideal rectangle in the cross section of ditch.But when trench depth being set in as the λ that reads optimum depth in the information that writes down among the main information region 41b/4, the result is for the poorest, the signal that can not get.In addition, if depth ratio λ/8 of pit are shallow, then because the noise effect that noise that medium self have and light source have is remarkable, so preferably shallow unlike λ/8.Therefore, the degree of depth of ditch and pit must be more shallow than λ/4, darker than λ/8, is preferably λ/8-λ/5.Because the cross section of pit that forms in the reality or ditch is not a desirable rectangle and have the inclined-plane, so equivalent depth is more shallow than actual grade.In addition, the influence on inclined-plane is obvious to the information signal that is read recorded information among the main information region 41b by the tracking error signal comparison of recommending the method detection.Having the regulation inclined-plane in pit or the ditch by making, is λ/4 even make the degree of depth of ditch and pit, also can guarantee to read the information signal of the information that writes down among the main information region 41b and by recommending two quality of signals height of tracking error signal that method detects.That is, in fact, if equivalent ditch and pit depth Md ₁Has relation

λ/8≦Md ₁≦λ/4，

Then can obtain high-quality signal.

The cross section of Fig. 9 modal representation pit, Fig. 9 (a) represents the cross section of pit is formed the situation of ideal rectangle shape, Fig. 9 (b) expression forms the cross section of pit the situation of trapezoidal shape.When the pit amplitude is Pt ₁, pit depth is d ₁The time, shown in Fig. 9 (a), be under the situation of rectangular shape in the cross section of pit, the equivalent depth Md of pit ₁Be d ₁Former state is constant.On the other hand, shown in Fig. 9 (b), be under the situation of trapezoidal shape, when the amplitude of establishing trapezoidal inclined-plane is a phase encoding in the cross section of pit ₁, trapezoidal bottom surface amplitude be Pd ₁The time, equivalent depth probably is

Md ₁=d ₁* phase encoding ₁/ Pt ₁

In addition, Pt is arranged ₁=Pd ₁+ 2 * phase encoding ₁Therefore, the bottom surface amplitude Pd that for example works as pit ₁Be 0 o'clock, equivalent depth Md ₁Become d ₁/ 2, even the depth d of pit ₁Be λ/4, equivalent depth Md ₁Become λ/8, the tracking error signal that is detected by the method for recommending also can obtain big amplitude.Much less, when calculating actual grade, the also essential refractive index of considering the material of formation optical storage media.

In addition, in optical storage media 41, even in the intersection setting of control data zone 41a and main information region 41b by not reading the buffer area 41d that buffer area 41c that also harmless ditch constitutes and pit constitute.Buffer area 41c, buffer area 41d are set respectively, so that read the information of the intersection record of control data zone 41a and main information region 41b without barrier, even promptly also can obtain good tracking error signal in the boundary of control data zone 41a and main information region 41b.

In the optical storage media 41 of present embodiment, comprise the optical storage media information that prevents Copy Info (key information) and be registered as swing (wobbling) signal in the sufficiently high frequency downconverts system of the servo frequency domain of comparison-tracking.Therefore, even use common infromation recording/reproducing apparatus to attempt replicate optical storage media 41, also can't duplicate the ditch of wobble modulations, therefore reproducible does not have the optical storage media 41 that prevents Copy Info.Thereby, effectively got rid of bootlegging.

In addition, also can in optical storage media 41, write down also reproducible information.At this moment, needn't encrypt the data that write down among the main information region 41b, needn't decipher the key information of usefulness certainly yet, therefore, key information is not recorded among the 41a of control data zone.

In addition, can discern the identification code of the information that writes down among the also reproducible main information region 41b whether, thereby whether can effectively discern reproducible information by record in control data zone 41a or main information region 41b.In addition, the optical storage media 41 of present embodiment is by making the track space Tp of control data zone 41a ₁Track space Tp than main information region 41b ₂Wide, thus even be under the situation of λ/5 in trench depth, the signal quality of the tracking error signal that the method for recommending obtains might as well.The ratio that control data zone 41a accounts for optical storage media 41 integral body is less than 5%, even widen track space slightly, the reduction of recording capacity can be ignored basically also less than 1%.

In addition, because the data that write down among the main information region 41b do not swing, can not increase cross-talk fully, promptly can not reduce signal quality, optical storage media that reliability is high so can provide.

(embodiment 2)

Fig. 3 is the block diagram of the structure example of expression information reproduction apparatus of the present invention.In optical storage media, use the optical storage media 41 shown in the embodiment 1.Light picker 4 is the laser of 400nm to optical storage media 41 illumination wavelength lambda, and the signal that writes down in the playback light medium 41.Transmission control unit (TCU) 5 makes light picker 4 move to the radial direction of optical storage media 41, with at the optional position of optical storage media 41 reproducing signal.Optical storage media motor 6 makes optical storage media 4 rotations.The 1st control assembly 7 control light picker 4, transmission control unit (TCU) 5 and optical storage media motors 6.Amplifier 8 amplifies the signal that light picker 4 reads.

9 expressions the 2nd control assembly.Output signal to the 2nd control assembly 9 input amplifiers 8.Servosignals such as essential focus error signal and tracking error signal when the 2nd control assembly 9 generates light picker 4 and reads the signal of optical storage media 41 according to this signal, and this servosignal outputed to the 1st control assembly 7.

Figure 10 represents the differential operational portion 52,53 of one of the photodetector 51 of one of inscape of light picker 4 and inscape of control assembly 9.The formation of light picker 4 is different because focus error signal and tracking error signal detection mode are different, but represents here to the additional astigmatism of optical storage media 41 beam reflected and by the situation of the general formation of photodetector 51 sensitization with 4 photographic department 51a-51d.By obtaining focus error signal from the signal of photographic department 51a and 51c output with from the signal of photographic department 51b and 51d output by differential operational portion 52 differential operationals.On the other hand, by obtaining tracking error signal from the signal of photographic department 51a and 51d output with from the signal of photographic department 51b and 51c output by differential operational portion 52 differential operationals.The detection mode of focus error signal is the known manner that is called as Astigmatism methord, and the detection mode of tracking error signal is the known manner that is called as the method for recommending.Swing ditch or pit are the same with the BEAM SQUINT assigned position that makes light picker 4 optically focused corresponding to swing.Therefore, by using the parts that detect tracking error signal, can detect signal by swing ditch or pit record.That is,, then be not limited to the method for recommending, also phase difference method or 3 variety of ways such as method can be used for the wobble detection signal if can detect the mode of tracking error signal.Recommend in use under the situation of method because the optical system of light picker 4 and constitute the tracking error signal detection part of the 2nd control assembly 9 can the simplest formation, so cheap information reproduction apparatus can be provided.Much less, the detection mode of focus error signal does not retrain the present invention fully, can make in any way yet.

In addition, the signal of importing the 2nd control assembly 9 is a simulating signal, but the 2nd control assembly 9 is with this analog signal digital (2 value).In addition, the 2nd control assembly 9 judges whether bootlegging optical storage media 41, is being judged as under the situation of bootlegging, transmits control signal from forbidding output block 13, to stop output signal.

Demodulation parts 10 are analyzed the digitized signal that reads from optical storage media 41, simultaneously, according to the key information that the control data zone 41a from optical storage media 41 reads, separate data such as the image of code encryption or music.Signal from output block 14 output decoders.Detection part 11 detects address signal etc. from the signal by 9 outputs of the 2nd control assembly, and it is outputed to system control component 12.

System control component 12 is discerned optical storage media according to the optical storage media information (physical format information and optical storage media manufacturing information) that reads from control data zone 41a, and deciphering reproducing condition etc. are controlled whole information reproduction apparatus.

Under the situation of the information of record, according to the indication of system control component 12, the 1st control assembly 7 drives transmission control unit (TCU) 5 in playback light medium 41.As a result, transmission control unit (TCU) 5 makes light picker 4 to moving corresponding to the position of control data zone 41a.In addition, light picker 4 reads the optical storage media information that writes down among the 41a of control data zone.According to these information, system control component 12 sends indication to the 1st control assembly 7.According to the indication of system control component 12, the 1st control assembly 7 drive controlling transmission control unit (TCU)s 5.As a result, transmission control unit (TCU) 5 makes light picker 4 move to the desired locations of main information region 41b, and light picker 4 reads the tracer signal (data message) of optical storage media 41.

Optical storage media 41 is not limited to forbid originally do not have the optical storage media that duplicates under the situation of key information at light picker 4 from the optical storage media information that control data zone 41a reads, and forbids that output block 13 stops output signal.In addition, also can from information reproduction apparatus, discharge optical storage media 41.The alarm features (not shown) of the optical storage media warning of sending the expression bootlegging also can be set in addition, simultaneously.Forbid output block 13 and alarm features by additional, can strengthen the copyright protection function.

As described in example 1 above, also in optical storage media 41, store reproducible information sometimes.At this moment, be preferably in the identification code (reproducible identification code) of the information that writes down among the also reproducible main information region 41b of record expression among control data zone 41a or the main information region 41b.Under the situation of using this optical storage media 41, even information reproduction apparatus does not have key information in the data that light picker 4 reads from the 41a of control data zone, as long as can be from by detecting reproducible identification code in the signal that reads this optical storage media 41, then being judged as does not have this optical storage media 41 of bootlegging, and reproduces this optical storage media 41.Constitute according to this, because needn't overprotection needn't forbid the information of duplicating, so can not damage user convenience.

Information reproduction apparatus has been described here, but has had a plurality of information recording layers and 1 information recording layer is to write troactively under the situation of type or rewriting type, also recordable information reproduction apparatus at optical storage media.

(embodiment 3)

Fig. 4 represents the formation of optical storage media 42, as another embodiment of optical storage media of the present invention.Primary storage medium 42 have two information recording layer 42a and 42b, and information recording layer 42a reproduces special-purpose information recording layer, and information recording layer 42b is rewritable information recording layer. Information recording layer 42a, 42b have control data zone 42a ₁, 42b ₁With main information region 42a ₂, 42b ₂The control data zone 42a of information recording layer 42a, 42b ₁, 42b ₁All by identical modulation system swing ditch, write down the optical storage media information that comprises the key information that the information that writes down in the deciphering main information region uses.In addition, the control data of information recording layer 42a, 42b zone 42a ₁, 42b ₁Optical storage media both information of the optical storage media information of recorded information recording layer 42a and information recording layer 42b all.Thereby, when information that in wanting playback light medium 42, writes down or recorded information, no matter focusing on which information recording layer, which kind of formation can both discern optical storage media 42 easily is.

On the other hand, at the main information region 42a of information recording layer 42a ₂In, be listed as recorded information with pit, at the main information region 42b of information recording layer 42b ₂In, formation can obtain the ditch of tracking error signal.At main information region 42b ₂In to form ditch and information recording layer 42b be that to write the situation of type troactively the same.By all reproduce the tailored version optical storage medias, can rewriting type optical storage media and only can write down and generally in 1 time the optical storage media come record control data zone 42a by swing ₁, 42b ₁In position and modulation system during the information of record, from optical storage media being inserted infromation recording/reproducing apparatus to judging that optical storage media shortened for which kind of required time, so can shorten the time of infromation recording/reproducing apparatus before can record-playback.In addition, the processing of judging optical storage media is which kind of optical storage media is all the same, but so no matter be reproduce special-purpose massaging device or the massaging device of record-playback can both Common Hardware ﹠ Software, thereby because the hair style of device and mass production cost reduce, so a kind of massaging device of cheapness can be provided.Much less, optical storage media also can have the information recording layer greater than 3, and in addition, information recording layer also reproduces tailored version, writes type troactively, one of can the rewriting type.When forming ditch and come the recordable optical storage media of recorded information by flag column in main information region, the degree of depth of ditch and pit is preferably the scope of λ/16-λ/8.The reasons are as follows.That is, when coming recorded information with flag column, the degree of depth of ditch is shallow more, then in order to reduce the diffraction loss that ditch causes, increases the signal amplitude of the information signal that obtains from flag column.On the other hand, the tracking error signal that the method for recommending causes is λ/8 o'clock maximums in trench depth, and when trench depth was more shallow than λ/8, trench depth was shallow more, and then the amplitude of tracking error signal reduces.Trench depth be the tracking error signal intensity of λ/16 o'clock be trench depth be λ/8 o'clock tracking error signal 1/2.As long as the signal amplitude of tracking error signal descends less than 1/2, then is enough to allow.Therefore, if consider tracking error signal and information signal both sides, then the optimum range of trench depth is the scope of λ/16-λ/8.

After peelling off the protective seam of optical storage media, expose that pit forms part, thereby the behavior of electroplating, make stamper, former state punching press bootlegging optical storage media thereon becomes problem.On the contrary, by opening disclosed bar code in flat 2000-No. 76659 communiques in the optical storage media of explanation in the above-described embodiments and with the spy, can prevent to duplicate.In addition, resemble at optical storage media and to have under the situation of a plurality of information recording layers the present embodiment, peel off protective seam after, exposing pit, to form that part duplicates be unusual difficulty.

In the above description, example at the control data of information recording layer 42a, 42b zone 42a ₁, 42b ₁In all write down the formation of the optical storage media both information of the optical storage media information of recorded information recording layer 42a and information recording layer 42b, but these optical storage media information also can be recorded at least one side's control data zone 42a of information recording layer 42a, 42b ₁, 42b ₁In.At this moment, preferably the key horizon of optical storage media 42 is made as the information recording layer of recording light media information.

And the control data of information recording layer 42a, 42b zone 42a in the above description, ₁, 42b ₁All swing ditch, thereby record comprises the optical storage media information of the key information that information that deciphering writes down in the main information region uses, but also can not swing ditch with identical modulation system.

(embodiment 4)

Fig. 5 represents structure one example of other optical storage media of the present invention.Fig. 5 amplifies near the state boundary of the main information region 43b of optical storage media of present embodiment and control data zone 43a.Optical storage media is the same with optical storage media 41 in embodiment 1 or 2, has control data zone 43a, main information region 43b and cushions regional 43c.In main information region 43b, the information of depositing is recorded as and can be listed as through the pit that light reads.In the 43a of control data zone, optical storage media information (physical format information and optical storage media manufacturing information etc.) is recorded as and can be listed as through the pit that light reads.In addition, in the 43c of buffer area, also form the pit row.In the optical storage media 41 of embodiment 1, swing continuous ditch and come the information (optical storage media information) that writes down among the 43a of record control data zone, but in the optical storage media of present embodiment, the information that writes down among the 43a of control data zone is recorded as the pit row of swing.Because also form the pit row among the 43a of control data zone, thus can generate tracking error signal by phase difference method, and use this signal to carry out tracking Control.

Accept to be radiated at light beam on the main information region 43b by photodetector, obtain the reproducing signal of the information that writes down among the main information region 43b according to light summation (below be called and signal).On the other hand, the light beam of the photodetector sensitization irradiation by having 2 photographic departments, and differential operational is from the signal of these two photographic departments outputs (below be called differential wave), the reproducing signal of the information that writes down among the controlled data area 43a.By at control data zone 43a and main information region 43b information all being recorded as the pit row, the forming pressure in the time of can reducing to make optical storage media is so can reduce the cost of forming machine.In addition, because also shortened the shaping required time, so cheap optical storage media can be provided.

Here, the track space of main information region 43b is Tp ₂Be 0.32 micron, the track space of control data zone 43a is Tp ₁It is 0.35 micron.In addition, the pit amplitude that forms in establishing control data zone 43a is Mw ₁The time, have

Mw ₁＝0.5×Tp1。

In addition, the pit amplitude that forms in establishing main information region 43b is Mw ₂The time, have

Mw ₂＝0.3×Tp ₂。

That is the pit amplitude Mw that forms among the 43a of control data zone, ₁Than the pit amplitude Mw that forms among the main information region 43b ₂Wide.Thereby the information that writes down among the information that writes down among the 43a of control data zone, the main information region 43b can both be reproduced on the reliability highland.Make the pit amplitude Mw that forms among the 43a of control data zone ₁With the pit amplitude Mw that forms among the main information region 43b ₂Be not both because use and signal comes the reproducing signal of the information that writes down among the controlled data area 43a, the use differential wave obtains the reproducing signal of the information that writes down among the main information region 43b, so the top condition difference of pit amplitude.In addition, the pit amplitude Mw that forms among the 43a of control data zone ₁Be preferably

0.3×Tp ₁≦Mw ₁≦0.7×Tp ₁。

Obtaining under the situation of signal by carrying out differential operational, signal quality exists

Mw ₁＝0.5×Tp ₁

The time best.In addition, because the pit amplitude Mw that optical storage media produces when making ₁The signal amplitude change of difference guiding is also minimum.If in the scope in front, then can guarantee good signal quality in fact.

On the other hand, if the pit amplitude Mw that forms among the main information region 43b ₂Less than 0.5 * Tp ₁, the signal that can obtain then.

The pit that control data zone 43a, main information region 43b and cushioning forms among the regional 43c and the actual effect length of space (space) are standard with specified period T all preferably, are the integral multiple of this period T.Period T for example is 0.08 micron.Pit and space with 1-7 modulation are encoded and formed among the main information region 43b have the length of 2T-8T respectively.On the other hand, pit and the space that forms among the 43a of control data zone is respectively single 8T length.

By pit and space are made as single length respectively, in the phase place comparison of the phase comparator that constitutes phase-locked loop, can the invalid phase place comparative structure of wrong output.As a result, can generate highly stable clock signal.In addition, by pit and space are made as single length respectively, differential wave can be imported in the bandpass filter of narrow frequency domain, and obviously be reduced noise, so can increase the S/N of differential wave.Therefore, the information that writes down among the energy reliability highland reproducing control data area 43a.

In addition, pit and the space length ML that forms among the 43a of control data zone ₁At the optical source wavelength of light picker is the numerical aperture of λ (for example 405nm), object lens when being NA (for example 0.85), preferably relation

ML ₁≧2×λ/NA

Set up.Under the situation that this relation is set up, when generating clock signal, even do not use balanced device, the amplitude of the signal that obtains from pit and space becomes enough greatly, the also clock signal that can obtain, and circuit scale diminishes.Therefore, can provide cheap information reproduction apparatus.

In addition, for equivalent pit depth Md ₁, if relation

λ/8 ≦ Md ₁Set up ≦ λ/4,

Then can obtain high-quality signal.

In addition, by establishing pit and space length that forms among the 43a of control data zone and the integral multiple that is respectively period T hunting period, the clock signal that use can generate repeatedly from pit and space, but the information that writes down among the wobble detection modulated control data area 43a.Pit and space can form usually alternately, so exist frequency higher than swing, therefore, can generate the stable clock signal, and the information that writes down among the 43a of control data zone is detected on the reliability highland.

Fig. 6 represents a wobble pits that writes down and an example of using the detected digital signal of differential wave among the 43a of control data zone.

In this embodiment, establishing 1 wobble length Wob1 is 16T, in the information center that is equivalent to 1 or 0, for example has the pit of 8T length.That is, become pulse-position modulation.By becoming pulse-position modulation, so the shake grow is the information that writes down among the energy reliability highland reproducing control data area 43a.In addition, essential fringe time is present in the timing in space to make pit wobble, thus needn't high-speed response, can use cheap modulator elements such as acousto-optic element, so the optical storage media of cheapness can be provided.

In the optical storage media of present embodiment, the information that writes down in the control data zone is recorded as with the high warbled swinging signal of the servo frequency domain of sufficient comparison-tracking.Therefore,, also can't duplicate the ditch of wobble modulations even use common infromation recording/reproducing apparatus to attempt replicate optical storage media, therefore can not replicate optical storage media.Thereby, effectively got rid of bootlegging.

Here, the pit and the space that form among the 43a of control data zone are respectively single 8T length, but the same with the pit that writes down in the main information region, also can form the pit and the space of multiple length according to specific modulating rule.At this moment, because can make pit and space self have information, so can realize the optical storage media of high power capacity.But recorded in wobbles represent be the optical storage media of regular manufacturing or also information reproduction identifying information and make pit and space self effective especially when having the key information that decoding data encrypted information uses.At this moment, because can make key information have high content information, so be difficult to illegally analyze data encrypted information and decoding.Therefore, can improve the confidentiality of the data message that writes down in the main information region.The pit that writes down among modulating rule by the pit that will control data writes down among the 43a of zone and space and the main information region 43b and the modulating rule in space are made as identical, can use decoding to use circuit jointly, and can improve the information reproduction apparatus of cheapness.

In the present embodiment, example is encrypted the information that writes down among the main information region 43b, but also data encrypted information can be recorded among the main information region 43b.At this moment, the same with the optical storage media of embodiment 1, except that physical format information and optical storage media manufacturing information, also the key information that decoding data encrypted information can be used is recorded among the 43a of control data zone as optical storage media information.In addition, reproducing the information reproduction apparatus that this optical storage media uses can equally with the information reproduction apparatus of embodiment 2 constitute.

(embodiment 5)

Fig. 7 represents the state of the wobble pits that writes down in the control data zone and the digital signal of using differential wave to detect, as the variation of the optical storage media of embodiment 4.Be that with the difference of optical storage media shown in the embodiment 4 there is pit in the optical storage media shown in the embodiment 4 in the information center that is equivalent to 1 or 0, and there is pit in the optical storage media shown in the present embodiment in the end that is equivalent to 1 or 0 information.Under the situation of the optical storage media that uses present embodiment, the timing sampling differential wave in the end that is equivalent to 1 or 0 information is carried out 1 or 0 judgement, thereby, if make continuous ditch swing, then can guarantee same S/N.Thus, can detect the information that writes down among the 43a of control data zone in the reliability highland.

(embodiment 6)

Fig. 8 represents the state of the wobble pits that writes down in the control data zone and the digital signal of using differential wave to detect, as the another variation of the optical storage media of embodiment 4.Be with the difference of optical storage media shown in the embodiment 4, in the optical storage media shown in the embodiment 4 pit and space be made as the length of 8T respectively in fact, and in the optical storage media of present embodiment pit and space are made as the length of 2T respectively in fact.

The length M L in pit and space ₁Has ML ₁≧ λ/(2 * NA) relation.At this moment, the signal that can use repetition pit and space to obtain generates clock signal.

In addition, 1 wobble length Wob1 is 16T, and it is 32T that always there is the hunting period under the situation in swing.On the other hand because the repetition period in pit and space be 4T, so become 8 times of cycle in repetition pit and space hunting period.By more than 4 times of cycle that will be made as repetition pit and space hunting period, be difficult to be subjected to forming in the adjacent orbit influence in pit or formation space, can detect the information that writes down among the 43a of control data zone in the reliability highland.

In addition, shorten shortlyer by repetition period than the cycle of swing with pit and space, can be to making frequency be equivalent to the narrow frequency domain bandpass filter input differential wave that pit and the signal of space repetition period pass through, and obviously reduce noise, so can increase the S/N of differential wave.In addition, at this moment, be difficult to the influence that is subjected to forming pit in the adjacent orbit or forms the space.Therefore, the information that writes down among the energy reliability highland reproducing control data area 43a.

(embodiment 7)

Figure 11 represents as the photodetector 51 of one of inscape of light picker 4 and detects tracking error signal and the swinging signal signal that constitutes, as another variation of information reproduction apparatus of the present invention.Detect tracking error signal and swinging signal with a part that constitutes the inscape that is control assembly, replace with this formation by tracking error signal test section with control assembly 9, but the configuration information transcriber.Here, detect tracking error signal and swinging signal by phase difference method.Addition portion 54 will be from the signal plus of photographic department 51a and 51c output, and addition portion 55 will be from the signal plus of photographic department 51b and 51d output.Be transfused to regularly comparing section 56 from the signal of addition portion 54 and 55 outputs.Regularly comparing section 56 outputs change signal regularly corresponding to shine the mark top and the beam diffraction light on the terminal that form the information recording layer of optical storage media 41 from light picker 4.After the high fdrequency component that the signal of timing comparing section 56 outputs is not wanted, become tracking error signal by low frequency filter 57 reduction tracking servoes.And, after add up on average, become swinging signal by accumulative total averager 58 from the signal of timing comparing section 56 output.

Addition portion 59 will output to clock signal generating unit 60 behind the signal plus of photographic department 51a-51d output.The flag column that forms in the information recording layer of clock signal generating unit 60 according to optical storage media 41 generates clock signal, frame synchronizing signal, swing polar signal, outputs to accumulative total averager 58.The accumulative total that accumulative total averager 58 carries out is average by controlling from the signal of clock signal generating unit 60 output.

Figure 12 represents the form of the information that writes down in the information recording layer of optical storage media 4.In information recording layer intersection record frame synchronization mode Sync and data rows Data1, Data2 ...Usually, classify as from 10 bytes to the 1K byte with respect to data about, be arranged to synchronous mode from 1 byte to 10 bytes about, in the time of can avoiding reading information owing to the position slide (bit slip) etc. produce a large amount of mistakes.After code conversion, record is equivalent to 1 or 0 data in data rows, serves as a mark respectively or the space.Write down the mark or the space of 3T-8T length respectively with EFM,, modulate the mark or the space of writing down 2T-8T length with 1-7pp with mark or the space that EFMplus writes down 3T-14T length.EFM is the code conversion mode of using in the compact disk, and EFMplus is the code conversion mode of using among the DVD, and 1-7pp is the code conversion mode of using in the Blu-ray dish.Here, T is a reference period, and so-called 3T mark is meant that length is 3 times the mark of T.

In this optical storage media, distribute the key information of 1 bit to 1 data rows.6P1-6P10 is respectively the weave mode group, and shown in the pattern list of Figure 13,1 weave mode is made of 6 bits.Under the situation of weave mode 6P1, if the bit of key information is 1, then become 000111 state, if the bit of key information is 0, then become 111000 state.That is, distribute complement.By distributing complement, the bit of identification key information is that the 1 or 0 used hardware or the formation of software become very simple, and cheap information reproduction apparatus can be provided.Weave mode 6P2-6P10 is also the same as shown in figure 13.

In addition,, make the center symmetric vibration of swing relative orbit, in the scope of each weave mode, realize the characteristic of no DC (DC-free), so can not cause bad influence fully to tracking servo by corresponding to 1 or 0 of weave mode.In addition, by swinging flag column according to weave mode shown in the pattern list of Figure 13, the simulation random pattern that the record swing is a kind of so the difficulty of deciphering uprises, is difficult to bootlegging.In addition, here, 10 weave mode 6P1-6P10 that 1 data rows is distributed for synchronous mode Sync and data rows in the synchronous respectively pattern of data that writes down.

The situation of data rows Data1 among Figure 12 is that the expression key information is 1 situation.Corresponding to the state of weave mode 6P1-6P10, the mark that writes down in the Wobble information recording layer.Modal representation swing signal waveform regularly is waveform WB.1 bit length of weave mode 6P1-6P10 is equivalent to 1 cycle of wobble clock signal WCLK.Trochoidal wave form regularly is applied in the swing variation at the rising edge of wobble clock signal WCLK.1 cycle of wobble clock signal WCLK is preferably about the several times of basic cycle T-10000 times.Retrain shortest length by the code conversion mode respectively, the condition that does not produce the scope of bad influence with the servo characteristic to tracking servo retrains extreme length.Here, 1 cycle of wobble clock signal WCLK is 100 times of reference period T.Therefore, in the length that is equivalent to 1 bit of weave mode, there are a plurality of marks and space.Therefore, from a plurality of signals of timing comparing section 56 outputs corresponding to the mark number.The polarity of product is switched according to the rule of weave mode shown in Figure 13 with from the swing polar signal of clock signal generating unit 60 outputs in accumulative total averager 58 limits, and limit accumulative total is on average from a plurality of signals of timing comparing section 56 outputs.When the product number of times that carries out of accumulative total averager 58 was N, signal to noise ratio (S/N ratio) was only improved the square root of N.Therefore, product often, the reliability height of the key information that then reads.Key information to 1 bit distributes several swings, can wait freely to design corresponding to bit number, the time that allows to read, the necessary signal to noise ratio (S/N ratio) of the key information of record.If it is certain to establish essential signal to noise ratio (S/N ratio), then the swing that the key information of 1 bit is distributed is many, and then Bai Dong variable amplitude is little, and the influence of cross-talk diminishes.Therefore, though not only in the control data information area in main information region recording key information, also can not damage the signal quality of main information region, but recording key information.When establish swing less than track space 1/30 the time, can ignore the influence of cross-talk fully.

The situation of having represented continuous input key information in the form of Figure 12, even but discrete be input in the information recording layer also harmless.At this moment, because the difficulty of deciphering is higher, so more difficult illicit copy.Import under the situation of key information continuously, shortening because read the required time, so can shorten the period of reservation of number of information reproduction apparatus.

In addition, described here, but restriction especially also can realize with 4 bits shown in the pattern list of Figure 14, or the use more bits realizes in the situation that 1 weave mode is realized no DC under as the scope of 6 bits.

Here, used weave mode after the data rows Data2 has been described, but both can write down with data rows Data1 in the pattern of the pattern same rule that writes down, also can be different.In addition, only use specific weave mode also harmless even in each data rows, only write down weave mode 6P1 etc.Used weave mode is little, and then the formation of information reproduction apparatus becomes simple, and is then more cheap.On the other hand, used weave mode is many, then deciphering difficulty, more difficult bootlegging.

In addition, when can not be mark but space also, have a plurality of pattern lists as the timing of swing displacement.When being made as the space by the timing that will swing displacement, the bad influence that the modulator performance that in the time of can being difficult to appear at cutting optical storage media stamper light beam is partial to causes is so can provide a kind of energy reliability highland to read the optical storage media of key information.

Clock signal generating unit 60 shown in Figure 11 generates data clock signal DCLK used in the reading of data, reads frame synchronizing signal and swings used wobble clock signal WCLK, swing polar signal according to the signal corresponding to mark and space row variation.Can generate wobble clock signal WCLK, the swing polar signal is because weave mode makes frame synchronization mode and data rows synchronous.By generating wobble clock signal WCLK, under the little situation of the amplitude of swing or during discrete record, all can generate wobble clock signal WCLK according to the signal that changes corresponding to mark and space row.In addition, be made as the integral multiple of data clock signal DCLK by 1 cycle with wobble clock signal WCLK, even do not have phase-locked loop again, but also the usage counter circuit generates wobble clock signal WCLK, can provide a kind of can constitute realization and cheap information reproduction apparatus by ball bearing made using.In order to make frame synchronization mode and swing synchronous, preferably for 1 frame synchronization mode, swinging is M/2.In addition, for 1 swing, preferably frame synchronization mode is M/2.Here, M is a natural number.Therefore, can freely set the relation of frame synchronization mode and swing by the design of hope.

Here shown in by phase difference method detect tracking error signal test section constitute an example, much less, to detect constituting of tracking error signal by phase difference method all applicable for the formation of the timing that changes of the signal of the formation of additional delay parts or the relatively output of 2 photographic departments from 4 photographic departments etc.

In addition, this detection mode is effective especially when flag column is swung.Phase difference method is that the light that detects by the mark diffraction changes mode regularly, preferably with the signal input phase comparer of AC coupling, thereby can not be subjected to the bias effect that electricity or optics produce, can reliability highland detection signal.

The wavelength of the hunting period shown in the various embodiments described above, track space, light source, the optical conditions such as numerical aperture of object lens are examples, in the scope that does not break away from spirit of the present invention, but various values.

In addition, the shape to optical storage media does not impose any restrictions, and is discoid or different shape in case of necessity such as card shape etc. is all harmless.

In addition, in the various embodiments described above, example in the control data zone, write down the optical storage media of the optical storage media information that comprises key information by swing ditch or pit, but ditch or pit are concavo-convex arbitrary all harmless.In addition, wobble modulations is that 2 values or 3 values are all harmless, because also the modulating rule of encoding is not imposed any restrictions, so applicable various modulating rule.

In addition, be preferably in the optical storage media with a plurality of information recording layers, the recording layer information that will how to form or as optical storage media information, be recorded in the control data zone about the information of tracking error signal polarity (below be called polarity information) about the surface configuration that recorded information in each information recording layer is used.What so-called described recording layer information was that expression forms for recorded information in information recording layer is which information of the recessed or protruding pit of the ditch recessed or protruding with respect to light incident side.Therefore, by the record polarity information, even detecting by the method for recommending under the situation of tracking error signal, also can be in the enterprising line trace action of the track of expectation.Under the situation that does not write down polarity information, under initial recorded information of optical storage media or situation about reproducing, because do not know the polarity of tracking error signal, so when following the tracks of action, do not know to trace on the track with where interorbital, so the time of essential study polarity.Polarity information is being recorded under the situation in control data zone as optical storage media information,,, can shortening record or essential time of information reproduction so do not need to learn the time of polarity because judge the polarity of the tracking error signal of each layer in advance.In expecting to be recorded in a plurality of information recording layers layer as benchmark to major general's polarity information.Have that the layer as benchmark is to be in and this information recording layer layer on the same position in having the optical storage media of single Information Level in the optical storage media of a plurality of information recording layers.Promptly, for optical storage media with single information recording layer, if the distance of establishing from the light entrance face to the information recording layer is x, then for optical storage media, is positioned at apart from light entrance face and becomes described key horizon apart from the information recording layer on the x with a plurality of information recording layers.In addition, for optical storage media, be preferably in each information recording layer and write down polarity information with a plurality of information recording layers.

In addition, because the present invention is also applicable under one of the concavo-convex situation that forms mark down, so when making optical storage media, can freely select the whole bag of tricks.Thereby can provide a kind of optical storage media of cheapness.

And, the invention is not restricted to flag column is formed the medium of concavo-convex pit, also applicable to the deep or light optical storage media that forms flag column according to pigment.

In addition, be listed as situation about data being recorded in the main information region by recessed or protruding pit under, preferably also record the information in the control data zone by recessed or protruding pit row.By all being listed as record is carried out in main information region, control data zone by pit, compare with the mixed situation about existing of pit and ditch, the forming operation when making optical storage media is very easy to, thereby, can improve the qualification rate when making optical storage media, cheap optical storage media can be provided.In addition, at this moment, by the information in the control data zone of will being recorded in about optical storage media be recorded as be recorded in main information region in the pit row of the identical modulation system of information, thereby but the software that uses during the information that writes down in the shared reproduction main information region of former state during the information that writes down in the reproducing control data area can provide cheap information reproduction apparatus.In addition, preferably the information with optical storage media is listed as record as pit, and comes recording key information by the pit that writes down in the swing control data zone.During the information that in reading the control data zone, writes down, can read key information simultaneously, promptly, essential time in the time of can need not to read key information in fact, can not retrain from optical storage media being inserted the required time of information that information reproduction apparatus writes down to the playback light medium and can not producing the information reproduction apparatus of more stand-by period burdens so can provide a kind of.But also can use expression be the optical storage media of regular manufacturing or also the identifying information etc. of the information reproduction information that can discern the optical storage media of regular optical storage media or bootlegging replace key information, reach purpose of the present invention equally.In addition, be suitable for phase difference method and having under the situation of optical storage media of the form that does not hinder information regeneration fully, preferably the pit depth with essence is made as about λ/4.At this moment, best from the signal jitter that pit row obtain, in addition, the S/N of the tracking error signal that is obtained by phase difference method is also best, and the result obtains the high optical storage media of reliability.

In addition, improve signal to noise ratio (S/N ratio), be not limited to the detection mode of phase difference method, can improve signal to noise ratio (S/N ratio) by the accumulative total averager too even recommend other signal detecting mode such as method by using the accumulative total averager.

(embodiment 8)

Below, describe embodiments of the invention 8 in detail with accompanying drawing.Below, example DVD is used as optical storage media, but optical storage media of the present invention is not limited to DVD.

Figure 15 is the schematic diagram of record mark displacement among the expression present embodiment DVD.The DVD of present embodiment is the DVD that writes down main information with frame unit, has synchronous code portion 101 and data portion 102.In this DVD, at least in partial frame, make record mark (radial direction) microdisplacement (swing) radially of removing the data portion 102 after the synchronous code portion 101 according to displacement control signal, write down secondary information.

The displacement control signal of the so-called DVD of present embodiment is by the signal of initialized simulation random number series with secondary information spread spectrum in the insertion position of synchronous code.At displacement control signal is in the interval of " 1 ", and record mark is only to dish outer circumferential side displacement small displacement D ₁On the other hand, be in the interval of " 0 " at displacement control signal, record mark is all side displacement small displacement D in dish only ₀

The displacement of record mark is preferably the scope of 5nmp-p (nanometer phase encoding ak to phase encoding ak)～20nmp-p.This be because, by make record mark at radially displacement in this scope, be difficult to carry out the observation of SEM (scanning electron microscope), and can stably read swing.

Make cycle (hunting period) of record mark displacement preferably follow the above frequency band of frequency band of track servo.This is because when following the tracks of track servo, can not detect swing.For example, if the 16T swing then is preferably 3.75MHz.

And, be preferably in and have integer swing in each frame.This is because can revise the skew of swing detection, the swing of formation and main information synchronization.

On the other hand, because above-mentioned record mark is not implemented to axial displacement in important zone in the main information regenerations such as synchronous code portion 101, so even under the situation of the secondary information of record, the influence of reading precision to main information can be suppressed to minimum yet.

In addition, in DVD, to important ID in the 1st frame recording master information regeneration in the sector.

The DVD of present embodiment does not carry out displacement to radially to the important frame (frame 105 for example shown in Figure 15) of additional ID.That is, control whether to radially displacement by frame unit.

In addition, in DVD according to present embodiment, because,, may worsen the reproduction quality so when reproducing, be affected each other (cross-talk) to the record mark of radially displacement and the record mark of adjacent orbit by making record mark write down secondary information to microdisplacement radially.Therefore, though the zone record mark of the DVD of present embodiment by will writing down secondary information to the track space Tp in the zone of microdisplacement radially _A, be made as greater than the zone of not writing down secondary information, promptly do not make record mark to the track space Tp in the zone of microdisplacement radially _BThereby, solve crosstalk problem.But under the situation that crosstalk problem does not take place, the track space that writes down the zone of secondary information also can equate with the track space in the zone of not writing down secondary information the radial displacement of record mark little.

In addition, in the DVD of present embodiment, preferably establish record mark to radially displacement less than the radial displacement that does not allow to the optical discs in general of radially displacement.Thereby, confirm to have or not secondary information to become difficult from the record mark shape, can the information that confidentiality is higher be recorded as secondary information.

Below, illustrate by record mark with Figure 16 and to come the DVD of present embodiment is write down the form of secondary information to microdisplacement radially.

DVD has 16 sectors 202 in the ECC piece 201 as the logic unit of reading.In sector 202, there are 26 frames 207 with synchronous code portion 203 and data portion 204.In the 1st frame (#0) in sector 202, to data portion 204 additional ID205.

In embodiment 8,, illustrate that the record mark by making 3 frames writes down the form of the secondary information of 1 bit to microdisplacement radially as an example.

Promptly, in example shown in Figure 16, the security information of 1 bit (secure info[0]) is recorded in the 2-the 4 frame (in 3 frames of #1-#3) as secondary information, below, the the 23-the 25 frame (the secure info[7 of #22-#24)] too, in per 3 frames record 1 bit secondary information.Here, the example of security information as secondary information is shown, but the kind of secondary information and user are not limited to security information itself.

For by comparing with the front and back synchronous code, judgement is which frame detects frame dislocation when reproducing in the sector, simultaneously, also detects the bit dislocation, erroneous bytes etc. of information reproduction simultaneously and compensates the synchronous code of addition record in synchronous code portion 203.Therefore, if the accuracy of detection of synchronous code worsens, then owing to not detecting above-mentioned reproduction dislocation, so be difficult to abnormal reproduction is adapted to normal condition.CD according to present embodiment does not reproduce the secondary information of quality reduction ground record in order not make as mentioned above, does not carry out the radially microdisplacement of record mark in synchronous code portion 203.That is, in main information regeneration, do not carry out record mark in the important synchronous code portion 203, only the record mark of the data portion in the frame 204 is carried out radially microdisplacement to radially microdisplacement.

In DVD, the additional ID205 of the 1st frame in the sector as sector id.ID205 is used as positional information in the CD that the transcriber that reproduces this CD uses.Therefore,, then read and worsen equally, can have a strong impact on playback accuracy with synchronous code if the precision that reads of ID205 worsens.Therefore, the CD of present embodiment does not carry out displacement to radially to the record mark of the frame (the 26th frame of last sector (frame #25)) before the frame of the 1st frame in the sector that comprises ID205 and additional ID205.

As mentioned above, in the DVD of present embodiment, in as all 26 frames in the sector of additional ID unit, remove in 24 frames of the 1st frame and the 26th frame, with the secondary information of a plurality of frame units (per 3 frames in present embodiment 8) record 1 bit.That is, in present embodiment 8, the secondary information of record 8 bits in 1 sector, the secondary information of record 128 bits in the 1ECC piece.

Below, with Figure 17 illustrate according among the DVD of present embodiment by making record mark write down the method for secondary information to microdisplacement radially.

DVD is modulated into 16 bit informations (8-16 modulation) by the information with per 8 bits record, simultaneously, inserts synchronous code with every predetermined distance, generates channel code (Figure 17 A).In common DVD,, generate channel signal (Figure 17 B), and, on CD, generate record mark (Figure 17 C) by making the writing laser power variation according to this channel signal by NRZI conversion channel code.

In the DVD of present embodiment, during displacement enabling signal (Figure 17 D) was " H ", simulation random number series (Figure 17 E) took place, by making inside all sides of record mark or outer circumferential side microdisplacement, write down secondary information according to this simulation random number series.The displacement enabling signal is inserted during the synchronous code in each frame and is become " L " the 1st, the 26th image duration in each sector.In addition, during the displacement enabling signal was " L ", record mark was not to microdisplacement radially.

Be under the situation of [0] with secondary information bit value record, by carrying out above-mentioned simulation random number series (Figure 17 E) and secondary information [0] " different " computing, displacement control signal (Figure 17 F) generated.According to the phase encoding modulation deviation control signal (Figure 17 G) of this displacement control signal being implemented phase encoding modulation, make record mark to microdisplacement radially.In present embodiment 8, make phase encoding modulation deviation control signal for the record mark in the interval of " H " to CD outer circumferential side microdisplacement, make record mark to CD in all side microdisplacement of phase encoding modulation deviation control signal for the interval of " L ".Thereby, the displacement record mark (Figure 17 H) of the overlapping secondary information of formation [0] on CD.

On the other hand, with the secondary information bit value record situation that is [1] too, by carrying out above-mentioned simulation random number series (Figure 17 E) and secondary information [1] " different " computing, generate displacement control signal (Figure 17 I).According to the phase encoding modulation deviation control signal (Figure 17 J) of this displacement control signal being implemented phase encoding modulation, make record mark to microdisplacement radially.In present embodiment 8, make phase encoding modulation deviation control signal for the record mark in the interval of " H " to CD outer circumferential side microdisplacement, make record mark to CD in all side microdisplacement of phase encoding modulation deviation control signal for the interval of " L ".Thereby, the displacement record mark (Figure 17 K) of the overlapping secondary information of formation [1] on CD.

As mentioned above, the DVD record mark of present embodiment is removed record mark that generates synchronous code and the record mark that constitutes the 1st, the 26th frame, bit value [0] is being recorded as in the interval of secondary information, according to the synchronization code inserting position being the phase encoding modulation deviation control signal after the simulation random number series of benchmark is implemented the phase encoding modulation, to microdisplacement radially.On the contrary, bit value [1] being recorded as in the interval of secondary information, is the phase encoding modulation deviation control signal of implementing after the simulation random number series of benchmark after the phase encoding modulation according to reversing with the synchronization code inserting position, to microdisplacement radially.

Below, the information record carrier of present embodiment is described.In addition, though the example as CD with DVD is shown, the invention is not restricted to this here.

Figure 18 illustrates main formation of the DVD pen recorder of present embodiment.The DVD pen recorder of present embodiment 8 forms and can optically read record mark write down main information by go up spiral fashion at CD (DVD), simultaneously, according to being the displacement control signal that benchmark generates, write down secondary information to microdisplacement radially by making above-mentioned record mark with the timing of in the frame unit of main information, inserting synchronous code.This DVD pen recorder possesses timing generator 401, modulator 402, randomizer 403, XOR404, phase encoding modulator 405, recording channel 406, radial modulation device 408 and record-header 407.

Timing generator 401 generates synchronizing signal, byte clock, displacement control signal and phase-coded signal.Synchronizing signal is represented according to the timing of giving synchronous code as main information record with the recording clock of reference clock signal.The byte clock is the signal synchronous with byte unit, in DVD, is 16 frequency divisions of clock.As mentioned above, displacement control signal is the signal that only just becomes " L " when the timing of the 1st and the 26th frame and appended synchronization sign indicating number.Phase-coded signal is to repeat the signal of 8 clocks " L " in 8 clocks " H " back.The synchronizing signal that timing generator 401 generates to modulator 402, randomizer 403 and XOR404 output respectively, to randomizer 403 output byte clocks, to the 408 output displacement enabling signals of modulator radially, to phase encoding modulator 405 output phase coded signals.

Synchronizing signal is that expression is modulated main result of information, inserted the signal of the timing of synchronous code at every predetermined distance modulator 402, is the signal of expression from record frame beginning beginning the 32 clock intervals in DVD.

The byte clock is and byte unit (the 16 recording clock size) clock signal synchronous of the main information that writes down, generates by 16 frequency division recording clocks in DVD.

Displacement control signal is to become the signal that becomes " High " in " Low ", the interval outside above-mentioned in the interval of timing of inserting synchronous code by modulator 402 and the 1st and the 26th frame in the record sector in DVD.

Phase-coded signal is that preceding 8 bits of byte unit (16 recording clock size) of the main information of record are the signal of " Low " for " High ", back 8 bits.

The byte of the main information of 402 pairs of records of modulator (8 bit) unit transformation is 16 bit informations (8-16 modulation), simultaneously, and by generating channel code inserting synchronous code for the interval of " High " from the synchronizing signal of timing generator 401.In addition, by this channel code of NRZI conversion, generate channel signal, and output to recording channel 406.

Randomizer 403 generates simulation random number series according to synchronizing signal and byte clock from timing generator 401.Figure 19 represents its detailed diagram.

The randomizer 403 of present embodiment is made of shift register 501 and XOR502.Randomizer 403 is in the interval of " High " in synchronizing signal, presets the initial value that secret is stored in this information record carrier inside.On the other hand, be in the interval of " Low " in synchronizing signal, with LSB from the timing Output Shift Register of the synchronous byte clock of the main information byte unit of timing generator 401, as 1 bit simulation random number series.In addition, meanwhile, with shift register 501 from LSB to MSB 1 bit that is shifted, and make the shift register [10] and the exclusive logical OR of shift register [14] turn back to shift register [0].Like this, the bit base of 403 pairs of main information of randomizer takes place per 1 than the random number series of specially upgrading, and outputs to XOR404.

XOR404 is a part of calculating random number series and the exclusive logical OR of the secondary information of record, as shown in figure 20, mainly calculates portion 603 by secondary information storage part 601, secondary information update section 602 and exclusive logical OR and constitutes.

Secondary information storage part 601 is parts of the secondary information (being 128 bits in embodiments of the invention 8) of stored record in as each ECC piece of the logical message unit of main information.

Secondary information update section 602 is according to calculating the sector position and the frame position of record from the synchronizing signal of timing generator 401.In addition, from secondary information storage part 601, extract each zone of writing down the secondary information of 1 bit (in the present embodiment, the form of record 1 bit in 3 frames shown in Figure 16) corresponding to the secondary information of 1 bit of current sector position and frame position, output in " different " calculate portion 603.

As mentioned above, secondary information update section 602 is removed in the sector in all 24 frames of the 1st and the 26th frame, takes out the secondary information of per 1 bit of per 3 frames from secondary information storage part 601.Therefore, in 1 sector, take out the secondary information of 8 bits in turn, in the 1ECC piece, take out the secondary information of 128 bits in turn.

Phase encoding modulator 405 generates phase encoding modulation deviation control signal according to the displacement control signal of exporting from XOR404 with from the phase-coded signal that timing generator 401 is exported, and outputs to radial modulation device 408.The phase encoding modulator 405 of present embodiment by " different " door constitutes.

Recording channel 406 bases generate the control signal that makes the writing light beam [ON] [OFF] of exposure in CD (DVD) 410 from [1] [0] of the channel signal of modulator 402, output to record-header 407.

Record-header 407 by shining writing light beams and form record mark to CD 410, writes down main information according to [ON] [OFF] signal from recording channel.

Radial modulation device 408 is applied to the voltage near the electrode 409 that is arranged on the record-header 407 by control, make the writing light beam refraction that shines CD 410 from record-header 407.Thus, can make record mark to the laggard line item of radially micro-dislocation.As shown in figure 21, radial modulation device 408 is made of digital swinging signal generator 701, DA transducer 702 and LPF703.

Numeral swinging signal generator 701 generates from the displacement enabling signal of timing generator 401 with from the phase encoding modulation deviation control signal of phase encoding modulator 405.In addition, generate expression when modulator control signal during for " Low " be level "0", when the displacement enabling signal for " High " and phase encoding modulation deviation control signal during for " High " for "+" level, when the displacement enabling signal is the digital swinging signal of the 3 stage level of "-" level for " High " and phase encoding modulation deviation control signal during for " Low ", and output to DA transducer 702.For example, be under the situation of 10 bits at digital swinging signal, generate " 3FF " conduct "+" level of 16 systems, " 200 " that generate 16 systems generate " 001 " conduct "-" level of 16 systems as level "0".

DA transducer 702 digital to analog conversions (DA conversion) are from the digital swinging signal in 3 stages of digital swinging signal generator 701 outputs.The digital swinging signal that DA transducer 702 generates "+" level, "-" level and the level "0" that will import is transformed to respectively+V ,-analog wobble signal of V and earth level, output to LPF703.LPF703 generates the high fdrequency component that cuts out as noise component from analog wobble signal after, generate the simulation displacement control signal, and output to electrode 409.

As mentioned above, writing light beam is corresponding to the voltage level that is applied on the electrode 409, to radially refraction.Therefore, be under the situation of benchmark for example with the GND level, if apply+V voltage to electrode, the outside circumferential microdisplacement of record mark then, if apply-V voltage to electrode, inside all side microdisplacements of record mark then, and be formed on the CD 410.

Below, the action of writing down main information and secondary information by this information record carrier is described with Figure 22 and Figure 23.Figure 22 is the time diagram of the action under the situation of the secondary information bit value of expression record [0], and Figure 23 is the time diagram of the action under the situation of the expression secondary information bit value of record [1].

In this information record carrier, the main information that modulator 402 will write down is transformed to 16 bit informations (8-16 conversion) with byte unit, generates channel code (Figure 22 A, Figure 23 A).In addition, the synchronous code synchronizing signal of inserting from timing generator 401 in expression (Figure 22 C, Figure 23 C) regularly is the interval of " High ", after synchronous code is inserted channel code, by the NRZI conversion, generate channel signal (Figure 22 B, Figure 23 B), and output to recording channel 406.

In addition, timing generator 401 is created on the interval of the synchronous code portion 801 in each frame and removes in the interval of the 1st frame and the 26th frame and becomes the displacement enabling signal (Figure 22 D, Figure 23 D) of " High ", and outputs to radial modulation device 408.

Figure 24 is the time diagram of the variation of the above-mentioned displacement enabling signal of expression in the sector.The displacement enabling signal is the signal that becomes " High " as the interval 1004 that becomes " Low ", record data zone 802 to the synchronous code interval 1001 in the interval of each record synchronous code portion 801 of all 26 frames in the sector, with the interval 1002 of record the 1st frame and the interval 1003 of writing down the 26th frame.

In randomizer 403, the negative edge of the synchronizing signal (Figure 22 C, Figure 23 C) of the maker of self-timing in the future 401 is regularly as initialization timing 803, preset secret and be stored in inner initial value, according to byte clock from timing generator 401, per 1 bit generation random number series (Figure 22 E, Figure 23 E), and output to XOR404.In present embodiment 8, because expression is to the suitable example of DVD, so the channel signal unit corresponding to 16 bits of main information 1 byte is taken place the random number series of 1 bit.

In XOR404, the ECC unit of prior record is stored the secondary information of 128 bits, counting is from the synchronizing signal of timing generator 401, thereby the sector numbers and the frame number of judgement current record take out the secondary information of 1 corresponding bit from the secondary information of prior storage.By the secondary information of 1 bit of calculating taking-up (Figure 22 F, Figure 23 F) with from the random number series of randomizer 403 " different ", generate displacement control signal (Figure 22 G, Figure 23 G).

Therefore, the displacement control signal that XOR404 generates is under the situation of " 0 " at the secondary information bit of record, becomes the identical signal (Figure 22 G) of random number series that takes place with randomizer 403.On the contrary, be under the situation of " 1 " at the secondary information bit that writes down, become the equal signal of signal (Figure 23 G) with the random number series counter-rotating that randomizer 403 is taken place.

Then, the displacement control signal (Figure 22 G, Figure 23 G) that generates of XOR404 phase-coded signal (Figure 22 H, Figure 23 H) 401 that generate by timing generator, that per 8 bit channels signals are carried out " 1 " " 0 " counter-rotating is implemented the phase encoding modulation.As a result, obtain phase encoding modulation deviation control signal (Figure 22 I, Figure 23 I), output to radial modulation device 408.

Radial modulation device 408 is according to from the displacement enabling signal (Figure 22 D, Figure 23 D) of timing generator 401 with from the phase encoding modulation deviation control signal (Figure 22 I, Figure 23 I) of phase encoding modulator 405, generate and have 3 kinds of level (the GND level ,+the V level ,-the V level) simulation displacement control signal (Figure 22 J, Figure 23 J).The simulation displacement control signal becomes+the V level during phase encoding modulation deviation control signal is for " 1 ", becomes during " 0 "-the V level.By above-mentioned simulation displacement control signal is outputed to electrode 409, make the refraction of optical beam, thereby the facula position that forms with the writing light beam that shines from record-header 407 under the voltage condition that applies the GND level to electrode is a benchmark, at the mimotope shifting signal be+form hot spot to CD outer circumferential side displacement d under the situation of V level, be-situation of V level under in CD all side displacement d formation hot spots.Thus, for synchronous code, the record mark of removing the 1st frame and the 26th frame, can on CD, form to outer circumferential side microdisplacement Δ d, the inside all sides record mark of microdisplacement Δ d (Figure 22 K, Figure 23 K) radially radially.

Therefore, in the information record carrier according to present embodiment, if the secondary information of record [0] is identical with the channel signal of secondary information [1], it is the benchmark and the shape of reversing that the record mark of the record mark that then writes down secondary information [0] and the secondary information of record [1] forms with the record mark center line on CD.

Below, illustrate and reproduce record mark forms spiral helicine DVD on dish device, as the current concrete example that reproduces the information reproduction apparatus of main information and secondary information from optical storage media of the present invention.Transcriber of the present invention is not limited thereto example.

Figure 25 is the block diagram of the main piece of information reproduction apparatus of expression present embodiment.The information reproduction apparatus of present embodiment possesses and reproduces 1101, reproduces passage 1102, clock withdrawal device 1103, reproducing signal treatment circuit 1104, randomizer 1105, phase encoding modulator 1106, TE signal AD transducer 1107 and secondary information detector 1108.

Reproduce 1101 a record mark optically focused and illumination beams on CD 1109, its reflected light is transformed to electric signal, thereby generate, and output to and reproduce passage 1102 as RF signal by the information regeneration signal of record mark record by photodetector.Simultaneously, reproduce 1101 generate the center that makes light beam trace into spiral fashion be recorded in the record mark on the CD 1109 the center the result, the expression record mark is to the simulation TE signal of radially phase error, and outputs to TE signal AD transducer 1107.

Figure 26 is the schematic diagram that the main composition that the TE signal of record mark radial displacement is used is represented in the expression generation.

Reproduce 1101 by optical system 1202, make the light optically focused that penetrates from semiconductor laser 1201, focus is converged to record mark on the CD 1109.In addition, in optical system 1202, divide the laser beam of descriscent CD 1109 irradiations and reflected light, above-mentioned reflected light is transformed to electric signal by photodetector 1203,1204 from CD 1109.In outer circumferential side, interior all sides, the center line of relative record mark is symmetrical arranged photodetector 1203,1204.Photodetector 1203,1204 outer circumferential side or interior all side respectively electricity judge catoptrical brightness, so the signal level by obtaining photodetector 1203 and photodetector 1204 is poor, can extract record mark to radially displacement.

Usually, the center of laser beam traces into the center of record mark by tracking servo, but under the situation of the outwards circumferential displacement of record mark, the reflected light that photodetector 1203 senses is than the height of photodetector 1204, so output "+" current potential is as the TE signal.On the other hand, under the situation of the inside all side displacements in the center of record mark, the reflected light that photodetector 1203 senses is lower than photodetector 1204, so output "-" current potential is as the TE signal.In addition, to export this TE signal with the RF signal same frequency that reads signal as the simulation of record mark.

Reproduce passage 1102 by the RF signal from the reproduction head is carried out change or whole ripples such as waveform, be transformed to numeral and read signal, and output to clock withdrawal device 1103 and reproducing signal treatment circuit 1104.

(Phase Locked Loop: circuit phaselocked loop) is used for reading signal from reproduction passage 1102 digitized numerals and extracts the clock signal that reads signal Synchronization with above-mentioned numeral clock withdrawal device 1103 built-in PLL.In addition, under synchronizing signal timing from aftermentioned reproducing signal treatment circuit 1104, the clock signal that from the PLL circuit, extracts by 16 frequency divisions, generate with numeral read preceding 8 bits in 16 bit bases that the synchronous byte clock of 16 bit bases of signal and numeral read signal become " High ", after 8 bits become the phase-coded signal of " Low ".Clock withdrawal device 1103 is to reproducing signal treatment circuit 1104, randomizer 1105 and secondary information detector 1108 output byte clocks, to phase encoding modulator 1106 output phase coded signals.

Reproducing signal treatment circuit 1104 is according to read signal and the clock that comes self-clock withdrawal device 1103 from the numeral of reproducing passage, generate the synchronizing signal that expression detects synchronous code, detection position with above-mentioned synchronous code is a benchmark, numeral is read signal 16 bit bases carry out main demodulates information, thereby reproduce main information to 1 byte (8 bit).In addition, read the synchronizing signal that detects synchronous code result generation the signal to clock withdrawal device 1103, randomizer 1105 and 1108 outputs of secondary information detector from numeral.

Randomizer 1105 has randomizer 405 identical functions with the information record carrier of present embodiment 8, regularly from " High " of the synchronizing signal of reproducing signal treatment circuit 1104, preset secret and be stored in initial value in the inside, timing at the byte clock that comes self-clock withdrawal device 1103, per 1 bit generation random number series (relevant series) outputs to phase encoding modulator 1106.Reproducing signal treatment circuit 1104 is judged frame number in the current reproduction sector according to synchronous code, and the coherent detection enabling signal of generation " Low " in the interval of the 1st frame, the 26th frame and synchronous code in detecting the sector, data portion outside above-mentioned generates the coherent detection enabling signal of " High ", and outputs to secondary information detector 1108.

Phase encoding modulator 1106 has phase encoding modulator 405 identical functions in the information record carrier with present embodiment 8, by " different " the door formation, by calculate random number series from randomizer 1105 (relevant series) and from the phase-coded signal of clock detector 1103 " different ", generate phase encoding modulation deviation control signal, and export secondary information detector 1108.

The clock timing sampling of self-clock withdrawal device 1103 is from reproducing a TE signal of 1101 and being transformed to digital signal since the TE signal AD transducer 1107.The digital TE signal that carries out after the AD conversion is output to secondary information detector 1108.

Secondary information detector 1108 according to the byte clock that comes self-clock withdrawal device 1103 with close series and digital TE signal from the synchronizing signal of reproducing signal treatment circuit 1104, coherent detection enabling signal with from the phase encoding modulation phase of phase encoding modulator 1106 from TE signal AD transducer 1107, detect secondary information.As shown in figure 27, secondary information detector 1108 possesses selector switch 1301, secondary information updating timing generator 1302, level integrator 1303 and threshold decision device 1304.

Selector switch 1301 closes series corresponding to the phase encoding modulation phase from phase encoding modulator 1106, the digital TE signal that level translation is exported by TE signal AD transducer 1107, and output to level integrator 1303.In present embodiment 8, digital TE signal is under the situation of center in record mark be 0 level, and, is "+" level in record mark during to the outer circumferential side displacement, when the inside all side displacement of record mark is "-" level, and, get 2 complement performance.Selector switch 1301 is for this numeral TE signal, for example classifying as under the situation of " 1 " from the phase encoding modulation phase of phase encoding modulator 1106 relation, with "+" level promptly "+" level, "-" level promptly the invariant state of "-" level output to level integrator 1303.On the contrary, classify as under the situation of " 0 ", be inverted to the state that "-" level, "-" level be inverted to "+" level with "+" level and output to level integrator 1303 in phase encoding modulation phase relation.

Secondary information updating timing generator 1302 comes the clock of self-clock withdrawal device 1103 by counting and from the synchronizing signal of reproducing signal treatment circuit 1104, calculate the frame number that reproduces in the sector, and in all 24 frames of the 1st and the 26th frame in removing the sector, generation outputs to level integrator 1303 and threshold decision device 1304 to the timing signal that per 3 frame units upgrade secondary information.

Level integrator 1103 is that calculating in the coherent detection enabling signal from reproducing signal treatment circuit 1104 is the part of the digital TE signal integration value that 2 of output, partial inversion complement shows from selector switch 1301 in " High " interval.

In addition, level integrator 1103 is in the timing of the secondary information updating timing signal of once exporting from 1302 pairs 3 frames of secondary information updating timing generator, to threshold decision device 1304 output integral results, simultaneously, the integrated value (vanishing) of zero clearing level integrator 1303 inside.

Therefore, level integrator 1103 is only classified " 1 ", digital TE signal as in the facies relationship of detected phase coded modulation and is classified " 0 ", digital TE signal as under the situation of "-" level for "+" level or phase encoding modulation phase relation, as integrated value on the occasion of increasing continuously.Symmetrically, only classify " 1 ", digital TE signal as and classify " 0 ", digital TE signal as under the situation of "+" level, reduce continuously to negative value as integrated value for "-" level or phase encoding modulation phase relation in the facies relationship of detected phase coded modulation.

Threshold decision device 1304 is in storage inside positive threshold value and negative threshold value, by the integrated value of exporting to per 3 frames from level integrator 1303 being carried out the threshold decision of above-mentioned positive negative threshold value, existing expression to have or not under the situation of the detection sign of secondary information and secondary information, export this pair information.

The threshold decision of threshold decision device 1304 is handled under the integrated value from 1303 outputs of level integrator be situation greater than positive threshold value, and output bit value [0] is as secondary information, and simultaneously, output " High " indicates as detecting.In addition, under integrated value was situation less than negative threshold value, output bit value [1] was as secondary information, simultaneously, and to detecting sign output " High ".On the other hand, under the situation of integrated value, to detecting sign output " Low ", as not detecting secondary information less than positive threshold value and the situation bigger (promptly comparing with positive negative threshold value, is near the integrated value 0) than negative threshold value.

Below, the action when reproducing main information and secondary information by this information reproduction apparatus is described.

Figure 28 and Figure 29 are the time diagrams when reproducing main information and secondary information by this information reproduction apparatus, and Figure 28 is the situation that detects the bit value [0] of secondary information, and Figure 29 is the situation that detects the bit value [1] of secondary information.

This information reproduction apparatus is to record mark (Figure 28 A, Figure 29 A) illumination beam that is formed on the CD, by photodetector reflected light is transformed to electric signal after, carry out digitizing by reproducing passage 1102, and generate numeral and read signal (Figure 28 B, Figure 29 B).

In addition, read signal according to above-mentioned numeral, clock withdrawal device 1103 generates the clock (Figure 28 C, Figure 29 C) that reads signal Synchronization with above-mentioned numeral.

The detection synchronous code detects synchronous code portion 1401 to reproducing signal treatment circuit 1104 signal by reading from above-mentioned numeral, and generates synchronizing signal (Figure 28 D, Figure 29 D).

Reproducing signal treatment circuit 1104 is judged the frame position of current reproduction by the synchronizing signal of counting in the sector, and generates each frame inherence and remove the coherent detection enabling signal (Figure 28 E, Figure 29 E) that becomes " High " in the interval as the synchronous code portion 1401 of synchronous code posting field and the 1st frame, the 26th frame.

Therefore, as shown in figure 24, can be created on the signal that becomes " High " in the interval behind the interval (with reference to the interval 1002,1003 of Figure 24) of removing the interval (with reference to the interval 1001 of Figure 24) of reproducing synchronous code portion 1401 and reproduction the 1st frame, the 26th frame in each frame, as the coherent detection enabling signal in the sector.

Randomizer 1105 presets prior secret in the timing (initialization timing 1403) that detects synchronizing signal and is stored in inner initial value, and according to the byte clock that comes self-clock withdrawal device 1103 (with the synchronizing signal is benchmark, the clock of 16 frequency-dividing clocks), per 1 bit generates relevant series (Figure 28 F, Figure 29 F).

Phase encoding modulator 1106 is a benchmark with the above-mentioned synchronizing signal from 1103 outputs of clock withdrawal device, use per 8 bits to repeat the phase-coded signal (Figure 28 G, Figure 29 G) of " High " " Low ", the relevant series from randomizer 1105 is implemented the phase encoding modulation.The phase encoding modulation coherent signal (Figure 28 H, Figure 29 H) that obtains is thus outputed to secondary information detector 1108.

Secondary information detector 1108 reproduces digital TE signal behind the 1101 TE signal (Figure 28 I, Figure 29 I) that generate according to digitizing, closing series (Figure 28 H, Figure 29 H) at the phase encoding modulation phase from phase encoding modulator 1106 is under the situation of " High ", the level of the digital TE signal of former state accumulative total.In addition, closing series (Figure 28 H, Figure 29 H) at the phase encoding modulation phase is under the situation of " Low ", adds up after the level counter-rotating with digital TE signal again.

Secondary information detector 1108 is judged to have or not secondary information by the aggregate-value (Figure 28 J, Figure 29 J) of inner level integrator 1303 is compared with positive negative threshold value.And, exist under the situation of secondary information, detect this pair information.

Figure 28 represents to detect the process of secondary information bit value [0].Aggregate-value (Figure 28 J) increases gradually to positive dirction.On the other hand, Figure 29 represents to detect the process of secondary information bit value [1].Aggregate-value (Figure 29 J) reduces gradually to negative direction.

In present embodiment 8, in the sector, remove in all 24 frames of the 1st frame, the 26th frame, per 3 frames are detected the secondary information of 1 bit.Figure 30 illustrates the delta frame in the present embodiment 8 and the relation of aggregate-value.

In the sector, by from the continuous reading and recording mark of the 1st frame to the 26 frames, reproduce main information, simultaneously, in removing all 24 frames of the 1st frame, the 26th frame, generate secondary information updating timing signal (Figure 30 B) by 1302 pairs of per 3 frames of secondary information updating timing generator.

Level integrator 1303 is by carrying out the level accumulative total of digital TE signal in the interval before output secondary information updating regularly, calculate aggregate-value (Figure 30 C), in the secondary information updating of output timing regularly, the aggregate-values that 3 frames are whole output to threshold decision device 1304, simultaneously, the aggregate-value of zero clearing level integrator 1303.In addition, (Figure 30 A) is under the situation of " Low " in the coherent detection enabling signal, keeps the aggregate-value of level integrator 1303.

As mentioned above, according to present embodiment 8, can be by can optically read record mark writing down in the CD of main information, write down secondary information by record mark to displacement radially.Thisly be difficult to be copied to other medium, so can be used for being recorded in the record of the encryption key etc. of the copyright in the CD by the information that writes down to displacement radially.

According to embodiments of the invention 8, even in record mark, misplace necessary synchronous code portion or constitute the record mark of the 1st frame in the sector of record sector ID etc. in DVD of bit dislocation, erroneous bytes, frame when revisal is reproduced is not also to radially displacement.Thereby the reliability decrease of main information can be suppressed to the minimum secondary information that writes down.

By make with the synchronous record mark of the synchronous code of main information to microdisplacement radially, can write down secondary information according to main recording of information form, so can when reproducing main information, reproduce secondary information.

Shown in the embodiment of the invention 8, by making radially displacement less than not writing down under the secondary information state amount that allows, the easy judgement of writing down secondary information becomes difficulty, can carry out the higher information record of confidentiality.

In addition, as mentioned above, secondary information is being used under the situation of copyright protection etc., expectation displacement radially can be detected in the noise scope of TE signal.This is because displacement is big, and is obviously outputed under the situation of TE signal, sees brokenly easily to displacement record mark radially.Therefore, record mark is preferably by at the shift amount that also can not cause to the record mark of the common recording mode of displacement radially to radially displacement.

(embodiment 9)

Describe embodiments of the invention 9 in detail with accompanying drawing.

Figure 31 writes down main information, writes down the sector format of the DVD of the present embodiment of secondary information by making record mark to microdisplacement radially by record mark.

The CD of the embodiment of the invention 9 is also the same with the CD shown in the embodiment 8, is the form of the secondary information of record 8 bits in all 24 frames of removing the 1st frame, the 26th frame in the sector.Be with the difference of embodiment 8, do not make the secondary information that has 1 bit in the 3 continuous frames, and in having discontinuous 3 frames of systematicness the secondary information of cutting recording.

In the present embodiment, as shown in figure 31, according to

The secondary information of (the 2nd frame, the 10th frame, the 18th frame) 1 bit

The secondary information of (the 3rd frame, the 11st frame, the 19th frame) 1 bit

The secondary information of (the 4th frame, the 12nd frame, the 20th frame) 1 bit

The secondary information of (the 5th frame, the 13rd frame, the 21st frame) 1 bit

The secondary information of (the 6th frame, the 14th frame, the 22nd frame) 1 bit

The secondary information of (the 7th frame, the 15th frame, the 23rd frame) 1 bit

The secondary information of (the 8th frame, the 16th frame, the 24th frame) 1 bit

The secondary information of (the 9th frame, the 17th frame, the 25th frame) 1 bit

Form, in the sector record 8 bits secondary information.

Figure 32 is the schematic diagram that the video disc recording mark of the expression embodiment of the invention 9 forms.

The main information of the CD modulation record of the embodiment of the invention 9, and according to the NRZI conversion by in frame unit, inserting the signal behind the channel signal (Figure 32 A) that synchronous code generated, the irradiation writing light beam forms spiral helicine record mark (Figure 32 B) on CD, write down main information thus.

Figure 32 B represents that record mark is not to the standard recording mark of radially displacement (not writing down secondary information).

On the other hand, writing down under the situation of secondary information to microdisplacement radially by record mark, according to the 1st frame and the 26th frame in the expression sector and the zone of inserting each frame synchronization code displacement enabling signal (Figure 32 C) in addition, be created on the initialized simulation random number of the timing series (Figure 32 D) of inserting synchronous code.

Additional secondary recording of information mark is according to specific phase coded modulation displacement control signal (Figure 32 G, K), with inside all sides or to the state recording record mark of outer circumferential side microdisplacement.To from the secondary information bit of record with in the initialized simulation random number of the timing series (Figure 32 D) of inserting synchronous code " different " displacement control signal (Figure 32 E, I) of calculating implements the specific phase coded modulation and obtains specific phase coded modulation displacement control signal.

Figure 32 F, J represent the phase encoding modulation deviation control signal of the common phase encoding modulation of the enforcement of embodiment 8 is compared with the specific phase coded modulation displacement control signal of present embodiment.

From Figure 32 F, J with compare as can be known with displacement record mark (Figure 32 H, J), the specific phase coded modulation displacement control signal (Figure 32 G, K) of control present embodiment makes the change point that does not have to radially microdisplacement in forming the way of record mark.

Below, illustrate the DVD pen recorder, as information record carrier according to present embodiment.Information record carrier of the present invention is not limited to the DVD pen recorder.

Figure 33 is the block diagram of expression according to main formation of the information record carrier of present embodiment.This information record carrier writes down main information by record mark, simultaneously, does not write down secondary information by do not have radially microdisplacement change point ground displacement in record mark.This information record carrier possesses: timing generator 1901, modulator 1902, randomizer 1903, secondary information updating device 1904, XOR1905, specific phase coding demodulator 1906, recording channel 1907, record-header 1908 and radial modulation device 1909.

Timing generator 1901 inserts the synchronizing signal of the timing of synchronous code to the timing that modulator 1902, randomizer 1903 and 1904 outputs of secondary information updating device are illustrated in each record frame, simultaneously, generate 1 byte synchronous byte clock with main information, and output to randomizer 1903, generate that preceding 8 bits become " High " in 1 byte (16 channel bit) of main information, back 8 bits become the phase-coded signal of " Low ", and output to specific phase coding demodulator 1906.

Each byte of 1902 pairs of main information of modulator is carried out the modulation (8-16 modulation) to the information of 16 channel bit, simultaneously, by inserting synchronous code in the timing from the synchronizing signal of timing generator 1901, outputs to recording channel 1907 after generating channel signal.

Randomizer 1903 is the pieces that have with randomizer 403 identical functions of the information record carrier of embodiment 8.Randomizer 1903 with the byte clock synchronization from timing generator, generates the random number series of per 1 bit in the timing initialization from the synchronizing signal negative edge of timing generator 1901, outputs to XOR1905.

The memory overlay in advance in the unit of sector of secondary information update section 1904 is recorded in all the secondary information bits (8 bit) on the main information, counting is from the synchronizing signal of timing generator 1901, thereby the frame number in the sector of generation current record, and as follows, per 1 than specially exporting secondary information to XOR1905.

(the 2nd frame, the 10th frame, the 18th frame) 1 bit the 1st secondary information

(the 3rd frame, the 11st frame, the 19th frame) 1 bit the 2nd secondary information

(the 4th frame, the 12nd frame, the 20th frame) 1 bit the 3rd secondary information

(the 5th frame, the 13rd frame, the 21st frame) 1 bit the 4th secondary information

(the 6th frame, the 14th frame, the 22nd frame) 1 bit the 5th secondary information

(the 7th frame, the 15th frame, the 23rd frame) 1 bit the 6th secondary information

(the 8th frame, the 16th frame, the 24th frame) 1 bit the 7th secondary information

(the 9th frame, the 17th frame, the 25th frame) 1 bit the 8th secondary information

XOR1905 by " different " (exclusive OR) door constitutes, by calculating) from the random number of randomizer 1903 series with from exclusive " or " (" different " of the secondary information of 1 bit of secondary information updating device 1904, generate displacement control signal, and output to specific phase coding demodulator 1906.

Specific phase coding demodulator 1906 is according to from the phase-coded signal of timing generator 1901 with from the channel signal of modulator 1902 displacement control signal from XOR1905 being implemented code modulated of specific phase.Its detailed piece constitutes as shown in figure 34.

This specific phase coding demodulator 1906 possesses phase encoding modulator 2001, edge determining device 2002, apart from determining device 2003, apart from determining device 2004, selector switch 2005, UP/DOWN counter 2006 and specific phase coded modulation displacement control signal maker 2007.

Phase encoding modulator 2001 is the pieces that have with phase encoding modulator 405 identical functions of the information record carrier of embodiment 8.Phase encoding modulator 2001 by " different " door constitutes, phase-coded signal by calculating self-timing generator 1901 and from the displacement control signal of XOR1905 " exclusive " or " ", generate phase encoding modulation deviation control signal, output to edge determining device 2002.

Edge determining device 2002 is according to from the recording channel signal of modulator 1902 and phase encoding modulation deviation control signal from phase encoding modulator 2001, generate phase encoding modulation deviation control signal edge A in the record mark, the interior phase encoding modulation deviation control signal B of record mark, and output to respectively apart from determining device 2003,2004.Phase encoding modulation deviation control signal edge A is illustrated in the rising edge marginal position of phase encoding modulation deviation control signal in the interval that generates record mark recording channel signal " High " partly on the CD in the record mark.Phase encoding modulation deviation control signal edge B is illustrated in the negative edge marginal position of phase encoding modulation deviation control signal in the interval of recording channel signal " High " in the record mark.

Apart from determining device 2003 according to from the recording channel signal of modulator 1902 with from phase encoding modulation deviation control signal edge A in the record mark of edge determining device 2002, calculate distance A (just) and output to selector switch 2005 to the distance A (bearing) of recording channel signal negative edge from phase encoding modulation deviation control signal edge A in the record mark from phase encoding modulation deviation control signal edge A in the record mark to recording channel signal rising edge.

Apart from determining device 2004 according to from the recording channel signal of modulator 1902 with from phase encoding modulation deviation control signal edge B in the record mark of edge determining device 2002, calculate from phase encoding modulation deviation control signal edge B in the record mark to recording channel signal rising edge apart from B (bearing) and from phase encoding modulation deviation control signal edge B in the record mark to recording channel signal negative edge apart from B (just), output to selector switch 2005.

Selector switch 2005 is according to the value of aftermentioned UP/DOWN counter 2006, at the UP/DOWN Counter Value is under the situation of " just ", output to UP/DOWN counter 2006 and specific phase coded modulation displacement control signal maker 2007 with distance A (bearing) or apart from B (bearing), at the UP/DOWN Counter Value is under the situation of " bearing ", outputs to UP/DOWN counter 2006 and specific phase coded modulation displacement control signal maker 2007 with distance A (just) or apart from B (just).

UP/DOWN counter 2006 is by initial counter value being made as " 0 ", upwards counting distance A (just) and apart from B (just), and downward counting distance A (bear) and apart from the counter formation of B (bearing).

Specific phase coded modulation displacement control signal maker 2007 comes under the situation of chosen distance A (just) in the distance of selecting according to selector switch 2005, make the rising edge position forward travel distance A (just) of phase encoding modulation deviation control signal, on the other hand, under the situation of chosen distance A (bearing), make the rising edge position delay distance A (bearing) of phase encoding modulation deviation control signal.In addition, under the situation of chosen distance B (just), make the negative edge position delay distance B (just) of phase encoding modulation deviation control signal, on the other hand, under the situation of chosen distance B (bearing), make the negative edge position forward travel distance B (bearing) of phase encoding modulation deviation control signal.

Therefore, this specific phase coding demodulator 1906 is in the displacement control signal of phase encoding modulation from XOR1905, in record mark, do not have change point, and, generate the interval specific phase coded modulation displacement control signal about equally of " High " " Low ", and output to radial modulation device 1907.

Figure 35 is the time diagram of the operation of expression specific phase coding demodulator 1906.

Recording channel signal shown in Figure 35 (Figure 35 A) and phase encoding modulator control signal (Figure 35 B) are postponed by the equilateral storage of shift register limit with the time of abundance in advance, thereby can carry out the control of illustrated time diagram.

This specific phase coding demodulator 1906 generates the phase encoding modulation deviation control signal (Figure 35 B) of phase encoding modulation deviation control signal, simultaneously, edge determining device 2002 is in the interval of " High " at the recording channel (Figure 35 A) that generates the interval of record mark on CD, generates the record mark inward flange A (Figure 35 C) of expression phase encoding modulator control signal (Figure 35 B) rising edge.In addition, (Figure 35 A) is in the interval of " High " at recording channel, generates the record mark inward flange B (Figure 35 F) of expression phase encoding modulator control signal (Figure 35 B) negative edge.

Extract in the record marks from position shown in the edge A (Figure 35 C) to the distance (time) of recording channel rising edge, as distance A (just) (Figure 35 D) apart from determining device 2003.In addition, extract in the record mark from position shown in the edge A (Figure 35 C) to the distance (time) of recording channel negative edge, as distance A (bearing) (Figure 35 E).

Equally, extract in the record marks from position shown in the edge B (Figure 35 F) to the distance (time) of recording channel rising edge, as distance B (bearing) (Figure 35 G) apart from determining device 2004.In addition, extract in the record mark from position shown in the edge B (Figure 35 F) to the distance (time) of recording channel negative edge, as distance B (bearing) (Figure 35 H).

Figure 35 I represents the count value of the UP/DOWN counter 2006 of specific phase coding demodulator 1906, and Figure 35 J represents the specific phase coded modulation displacement control signal as 1906 outputs of specific phase coding demodulator.

This specific phase coding demodulator 1906 is present under the situation of " High " interval (being present in the record mark) of recording channel at the change point of phase encoding modulation deviation control signal, by change point is advanced or postpones, be created on the specific phase coded modulation displacement control signal that does not have change point in the record mark outside record mark.

As an example, in Figure 35, describe the situation that the edge eg1 of phase encoding modulation deviation control signal (B) is displaced to the eg6 of special phase encoding modulation deviation control signal (J) in detail.

Here, with regard to recording channel signal (Figure 35 A), be located at the negative edge eg1 that has phase encoding modulation deviation control signal in the record mark interval of 8 clocks that are equivalent to write down reference clock.Therefore, record mark inward flange B represents the situation of eg1.

In record mark, detecting under the situation of negative edge eg1 by record mark inward flange B, generate " 5 " of 5 clocks of the time of expression from eg1 to recording channel signal rising edge eg11, as distance B (bearing), in addition, generate " 3 " of 3 clocks of expression, as distance B (just) from eg1 to recording channel signal negative edge eg12.

UP/DOWN Counter Value (judgement Counter Value) (Figure 35 I) is represented " 0 " in the moment of detecting eg1.That is, be " 0 " because judge to judge Counter Value, so chosen distance B (bearing) and the distance medium and small apart from B (just), promptly apart from B (just) make eg1 be displaced to the position eg6 of 3 clocks of delay, simultaneously, will be added on the UP/DOWN Counter Value apart from B (just).

Below, illustrate from eg2 to be displaced to eg7.

Wherein, the rising edge eg2 that establishes phase encoding modulator control signal (Figure 35 B) is present in the record mark of 6 clocks.At record mark inward flange A place its position is shown.

If logical record mark inward flange A represents to exist in the record mark edge of phase encoding modulator control signal, " 2 " of then extracting 2 clocks representing the distance from eg2 to recording channel signal rising edge eg13 are as distance A (just), in addition, " 4 " of 4 clocks of the distance of extraction expression from eg2 to recording channel signal negative edge eg14 are as distance A (bearing).

The timing UP/DOWN Counter Value down that detects eg2 is " 3 " that expression makes 3 clocks of eg1 delay, promptly be on the occasion of, so chosen distance A (bearing), and make eg2 be displaced to the position eg7 of delay distance A (bearing), simultaneously, deduct distance A (bearing), thereby upgrade the UP/DOWN Counter Value.

Equally, detect eg3, detect distance A (just)=" 6 ", detect distance A (just)=" 6 " from eg3 to recording channel signal negative edge from eg3 to recording channel signal rising edge as the change point in the record mark.

The judgement Counter Value that detects under the timing of eg3 is "-1 ", so chosen distance A (just) is displaced to the position eg8 of 6 clocks that advance with eg3, and count value added " 6 " is updated to " 5 ".

As mentioned above, the value of the UP/DOWN counter 2006 of specific phase coding demodulator 1906 is under the situation of the DVD that 11T is made as dominant record mark amplitude, be controlled at ± 11 between, simultaneously, can be created on the specific phase coded modulation displacement control signal that does not have change point in the record mark.

The recording channel 1907 of this information record carrier is adjusted the intensity or the writing light beam interval of writing light beam according to the channel signal from modulator 1902, and generates the control signal of the writing light beam that CD formation record mark is used, and outputs to record-header 1908.

Record-header 1908, forms record mark, thereby writes down main information to CD 1911 irradiation writing light beams according to the writing light beam control signal from recording channel 1907.

Radial modulation device 1909 has electrode 1910, in the displacement enabling signal from timing generator 1901 is in the interval of " High ", according to phase encoding modulation deviation control signal from specific phase coding demodulator 1906, make electrode 1910 have "+" electric charge or "-" electric charge, thereby make from interior all sides or the outer circumferential side displacement of the writing light beam of record-header 1908 irradiation to CD.As a result, by under the state of inside all sides of the record mark on the CD or outer circumferential side displacement, carrying out record, write down secondary information.Radial modulation device 408 in the information record carrier of the basic comprising of this part and embodiment 8 is identical.

Below, the information reproduction apparatus of present embodiment 9 is described.Figure 36 is the main block diagram of the information reproduction apparatus of present embodiment.The information reproduction apparatus of present embodiment possesses and reproduces 2201, reproduces passage 2202, clock withdrawal device 2203, reproducing signal treatment circuit 2204, randomizer 2205, specific phase coding demodulator 2206, TE signal AD transducer 2207 and secondary Information Extractor 2208.

Reproduce 2201 to CD 2209 illumination beams, generate simulation according to reflected light and read signal, and output to and reproduce passage 2202.In addition, reproduce 2201 and generate the simulation TE signal of expression record marks, and output to TE signal AD transducer 2207 to the phase error of the interior Zhou Fangxiang of relative orbit center or peripheral direction.

Reproduce 2202 pairs in passage and read from reproducing 2201 simulation of reading that amplify on the signal limit, changes such as waveform are carried out on the limit, generate numeral and read signal, and output to clock withdrawal device 2203 and reproducing signal treatment circuit 2204.

Clock withdrawal device 2203 is according to reading signal from the numeral of reproducing passage 2202, generate the clock that reads signal Synchronization with this numeral, and output to reproducing signal treatment circuit 2204, simultaneously, generate the synchronous byte clock of byte unit that reads signal with above-mentioned numeral, output to reproducing signal treatment circuit 2204, randomizer 2205 and secondary Information Extractor 2208.

Reproducing signal treatment circuit 2204 detects synchronous code portion from reading from a numeral of reproducing 2202 signal, according to the clock that comes self-clock withdrawal device 2203, byte clock, with the information conversion (8-16 modulation under the DVD of present embodiment situation) of 16 bits is the information of 8 bits, thereby extracts main information.

Randomizer 2205 is parts of randomizer 1905 identical functions in the information record carrier that has with present embodiment, in timing from the synchronizing signal of reproducing signal treatment circuit 2204, preset secret and be stored in initial value in the inside, timing at the byte clock that comes self-clock withdrawal device 2203, per 1 bit generation random number series outputs to specific phase coding demodulator 2206.

Specific phase coding demodulator 2206 is parts of specific phase coding demodulator 1905 identical functions in the information record carrier that has with present embodiment.Specific phase coding demodulator 2206 is for the relevant series from randomizer 2205, phase-coded signal by coming self-clock withdrawal device 2203 and read signal from the numeral of reproducing passage 2202, in the interval of reproducing record mark, after generating the relevant series of the specific phase coded modulation that does not have from " High " to " Low " or change point, output to secondary information detector 2208 from " Low " to " High ".

TE signal AD transducer 2207 to carrying out the AD conversion from a simulation TE signal that reproduces 2201, outputs to secondary information detector 2208 with digitized digital TE signal according to the clock that comes self-clock withdrawal device 2203.

Secondary information detector 2208 is according to the byte clock that comes self-clock withdrawal device 2203, from from the synchronizing signal of reproducing signal treatment circuit 2204, from the relevant series of specific phase coded modulation of specific phase coding demodulator 2206 with from detecting secondary information the digital TE signal of TE signal AD transducer 2207.As shown in figure 37, secondary information detector 2208 mainly possesses selector switch 2301, secondary information updating timing generator 2302, level integrator 2303 and threshold decision device 2304.

Selector switch 2301 is classified as under the situation of " High " in the specific phase coded modulation facies relationship from specific phase coding demodulator 2206, digital TE signal former state is outputed to level integrator 2203, in addition, classify as under the situation of " Low " in the facies relationship of specific phase coded modulation, behind the digital integrated value of reversing positive and negative, output to level integrator 2203.

Secondary information updating timing generator 2302 outputs to level integrator 2303 from from the synchronizing signal of reproducing signal treatment circuit 2304 with extract the frame position information of reproducing the byte clock of self-clock withdrawal device 2203 as the frame identification signal.

Level integrator 2303 has 8 storage part 2302[0 in inside]-2303[7], and, come accumulative total from the counter-rotating of selector switch 2301 outputs or the digital TE signal level of non-counter-rotating by following corresponding relation according to frame identification signal from secondary information updating timing generator 2302.Will be by storage part 2302[0]-2303[7] the digital TE signal level of accumulative total is as correlation [0]-correlation [7], outputs to threshold decision device 2304.

(the 2nd frame, the 10th frame, the 18th frame) storage part 2303[0]

(the 3rd frame, the 11st frame, the 19th frame) storage part 2303[1]

(the 4th frame, the 12nd frame, the 20th frame) storage part 2303[2]

(the 5th frame, the 13rd frame, the 21st frame) storage part 2303[3]

(the 6th frame, the 14th frame, the 22nd frame) storage part 2303[4]

(the 7th frame, the 15th frame, the 23rd frame) storage part 2303[5]

(the 8th frame, the 16th frame, the 24th frame) storage part 2303[6]

(the 9th frame, the 17th frame, the 25th frame) storage part 2303[7]

Integrated value 2303 is by from the secondary information updating timing signal of secondary information updating timing generator 2302 to the output of per 1 sector, and zero clearing (vanishing) is with storage part 2302[0]-2303[7] in the level integrated value (correlation [0]-correlation [7]) of each TE signal of storage output to the value in the threshold decision device 2304.

Threshold decision device 2304 extracts the secondary information of 8 bits by will 8 integrated values (correlation) from 2303 outputs of level integrator comparing with negative threshold value with being stored in inner positive threshold value in advance to 1 sector under secondary information updating regularly.

The CD of the embodiment of the invention 9 is pressed form shown in Figure 31, as

(the 2nd frame, the 10th frame, the 18th frame) secondary information [0]

(the 3rd frame, the 11st frame, the 19th frame) secondary information [1]

(the 4th frame, the 12nd frame, the 20th frame) secondary information [2]

(the 5th frame, the 13rd frame, the 21st frame) secondary information [3]

(the 6th frame, the 14th frame, the 22nd frame) secondary information [4]

(the 7th frame, the 15th frame, the 23rd frame) secondary information [5]

(the 8th frame, the 16th frame, the 24th frame) secondary information [6]

(the 9th frame, the 17th frame, the 25th frame) secondary information [7]

Like that, by record mark to displacement radially with the secondary information stores of 8 bits in 1 sector.

Figure 38 is the schematic diagram that is illustrated in the correlation of calculating in the secondary information detector 2208.

Usually, the transcriber of CD has the sector of a plurality of frames of spiral fashion record from interior all side direction outer circumferential side successively reproducings.

This information reproduction apparatus is discerned the frame number of all 26 frames in 1 sector by appending to synchronous code on the frame, and uses the storage part corresponding to each frame number to extract correlation by level integrator 2303.

Figure 38 A is above-mentioned frame identification signal, for 24 frames removing the 1st frame and final frame in the sector, to 2303 outputs of level integrator

(the 2nd frame, the 10th frame, the 18th frame) identification code [0]

(the 3rd frame, the 11st frame, the 19th frame) identification code [1]

(the 4th frame, the 12nd frame, the 20th frame) identification code [2]

(the 5th frame, the 13rd frame, the 21st frame) identification code [3]

(the 6th frame, the 14th frame, the 22nd frame) identification code [4]

(the 7th frame, the 15th frame, the 23rd frame) identification code [5]

(the 8th frame, the 16th frame, the 24th frame) identification code [6]

(the 9th frame, the 17th frame, the 25th frame) identification code [7]

Identification signal.

Level integrator 2303 has 8 storage part 2303[0 in inside]-2303[7], by the storage part corresponding to identification code, integration is from the counter-rotating of selector switch 2301 outputs or the digital TE signal level of non-counter-rotating.

Figure 38 B is that the record mark by making the 2nd frame, the 10th frame and the 18th frame writes down the situation of secondary information bit [0] to microdisplacement radially, is the facies relationship of specific phase coded modulation only to take place classify " High " and digital TE signal as and classify " Low " and the digital TE signal situation for " bearing " as for " just " or the facies relationship of specific phase coded modulation.At this moment, in the interval of the 2nd, 10,18 frames, storage part 2303[0] correlation [0] increase to positive dirction is dull.

Figure 38 C is that the record mark by making the 3rd frame, the 11st frame and the 19th frame writes down the situation of secondary information bit [1] to microdisplacement radially, is the facies relationship of specific phase coded modulation only to take place classify " High " and digital TE signal as for " bear " or " Low " classified in the facies relationship of specific phase coded modulation as and digital TE signal is the situation of " just ".At this moment, in the interval of the 3rd, 11,19 frames, storage part 2303[1] correlation [1] reduce to negative direction is dull.

As mentioned above, the CD of the embodiment of the invention 9 writes down main information with the frame unit that follows synchronous code, with the sector unit that is made of a plurality of frames, by the displacement of having a mind to radially, the secondary information of 1 bit is recorded in dish goes up in the record mark of discontinuous 3 frames.Thereby,, also can reduce the danger that 3 frames of the secondary information of record all disappear even under existence jumps the situation of burst error of a plurality of frames.

And the information reproduction apparatus of the embodiment of the invention 9 carries out not having the special phase encoding modulation of change point in record mark to the series that has produced random number in inside.Thus, by microdisplacement radially, in the CD that has write down secondary information, because in record mark, do not produce displacement to radially, so can be so that be difficult to find displacement to radially.

The information reproduction apparatus of the embodiment of the invention 9 can to the secondary information of discontinuous 3 frame recording 1 bits the time, record mark or not the CD of radially displacement, stable reproduction master's information and secondary information.

As mentioned above, because the secondary information of the CD of present embodiment is come record by record mark to microdisplacement radially, so be difficult to copy in the common rewriting type CD.Therefore, for example also decoding key of the content that writes down in the optical disk etc. can be come record as secondary information.Perhaps, in the past in DVD etc., also the dish identification code of the special recording mode record of the initial program by using high price and high output record can be come as secondary information, manufacturing cost can be cut down.

In addition, under the situation of reproduction special-purpose cd that with DVD-ROM is representative, also can consider the tag recognition sign indicating number of generation dish is come record as secondary information.

In the foregoing description 8,9, the initial value secret of the random number series of the random number of information record carrier and transcriber series generator is stored in inside, the dish identification code of special recording mode record that also can replace the initial program by will using high price and high output is as the initial value of random number series generator, also can get rid of pirate manufacturer with this initial program etc.

The sevtor address that also can use the initial value with the random number series generator of the information record carrier of embodiment 8,9 and transcriber to append in the unit of sector carries out initialization.At this moment, can sector unit set different initial values, and can improve the invisible of secondary information.

In the foregoing description 8,9, illustrate by 3 continuous frames or discontinuous 3 frames and write down the form of secondary information, but the invention is not restricted to this.For example, a plurality of frames that jump write down the CD of the secondary information of 1 bit and its pen recorder or transcriber and also all belong to technical scope of the present invention.For example, sometimes by 1 frame is divided into a plurality of intervals (0-N), and a plurality of frames that jump are calculated respectively and are correlated with information reproduction in the interval of this 0-N.

In the foregoing description 8,9, illustrate that the initial value secret with random number series generator is stored in the form of piece inside, but the invention is not restricted to this.For example, according to the form that the independent identification code of each CD is used as the initial value of random number series, also can be by writing down record mark to the intrinsic radial displacement of each disk medium.

For example, also can use the initial value of the key information of result's output that the equipment ineffective treatment handles as random number series.At this moment, also can carry out the equipment that secondary information writes down or reproduces by ineffective treatment.

In addition, also address information, the encrypted content key that writes down in the CD is used as the form of random number series initial value.

Most important information during illegal act is usurped because the random number initial value is in order to prevent secondary information is so also consider at the secret initial value that generates of device interior.

(embodiment 10)

Describe embodiments of the invention 10 in detail with accompanying drawing.

The something in common of the CD of embodiment 10 and the foregoing description 8,9 is to write down main information by record mark, writes down secondary information by making record mark to microdisplacement (swing) radially.In addition, be that make the data portion direction along ng a path of each frame of record mark swing be divided into a plurality of of random-length, hunting period is all different in each piece with the difference of embodiment 8,9.

If the hunting period of record mark is certain, then, can be easier to detect hunting period by by observation trail-and-error signals such as frequency spectrum analysers.If in the wobble detection cycle, then have and use bandpass filter from the trail-and-error signal, to decipher the danger of secondary information.

On the contrary, in the CD of present embodiment, as mentioned above, in frame in each piece hunting period difference, so even, also be difficult to the wobble detection cycle by frequency spectrum analyser observation.Can prevent that thus the people who for example thinks bootlegging from deciphering secondary information.

The formation and the action of the information record carrier of present embodiment are described with reference to Figure 39-Figure 41 here.As shown in figure 39, the information record carrier of present embodiment constitutes the same except that the timing generator 411 that possesses output random number generation clock replaces the timing generator 401 that generates the byte clock with the information record carrier of embodiment 8.In the present embodiment, to have with embodiment 8 in the additional reference marks identical of the piece of the same function of piece of explanation with embodiment 8, omit the detailed description of its formation and function or action.Embodiment 10,11 described later too.

Do not need mutual difference the hunting period of all pieces, if can keep the scrambling of the illegal detection difficult degree of hunting period, then hunting period is identical also passable in a part of piece.

As shown in figure 40, timing generator 411 possesses random number generator 411a, totalizer 411b, reciprocal counter 411c.Random number generator 411a is set frame number, as the initial value of random number series.Totalizer 411b will be from the cycle lower limit addition of random number (Figure 40 B) with the regulation of random number generator 411a output, and with the result as prevalue (Figure 41 C), output to reciprocal counter 411c.In addition, in the example of Figure 41, the cycle lower limit is made as " 7 ".Reciprocal counter 411c becomes " 0 " at Counter Value the moment generates clock (Figure 41 D) with random number and outputs to randomizer 403, simultaneously, resets from the prevalue of totalizer 411b output, and (Figure 41 E) begins to count down.

From the phase-coded signal (Figure 41 F) of timing generator 411 output of present embodiment is to become " Low " from presetting the interval first half that reciprocal counter 411c begins to become to Counter Value " 0 ", becoming the signal of " High " at this interval latter half.Be under the situation of odd number from presetting the clock number that reciprocal counter 411c begins to become to Counter Value the interval of " 0 ", " Low " and one of " High " mutual long 1 clock.In the example for example shown in Figure 41, in the interval of 15 initial clocks, " Low " is 7 clocks, and " High " is 8 clocks, and in the interval of 11 clocks of back, " Low " is 6 clocks, and " High " is 5 clocks.In addition, for example in odd-numbered frame before under the situation of " Low " many 1 clocks, " High " many 1 clocks in current odd-numbered frame.

Therefore, in the present embodiment, the frame that makes record mark swing is divided into a plurality of of random-length, and uneven each piece of these length generated the interval phase-coded signal that equates substantially of " Low " and " High ", generate phase encoding modulation deviation control signal according to the phase-coded signal of generation.Thus, become at random the hunting period in the frame, even observed by frequency spectrum analyser, also is difficult to the wobble detection cycle.Therefore, can realize being difficult to decipher the CD of secondary information or bootlegging.

The following describes the information reproduction apparatus of present embodiment 10.Figure 51 is the block diagram of main composition of the information reproduction apparatus of expression present embodiment.In Figure 51,, omit its detailed description to having and the additional reference marks identical of the piece of the same function of information reproduction apparatus (with reference to Figure 25) of embodiment 8 with embodiment 8.

Shown in Figure 51, the difference of the information reproduction apparatus of the information reproduction apparatus of present embodiment and embodiment 8 is to possess timing generator 1411 and replace randomizer 1105 and phase encoding modulator 1106 (with reference to Figure 25).

The inside formation and the timing generator 411 shown in Figure 39,40 of timing generator 1411 are roughly the same, but be that with the difference of timing generator 411 (1) is shown in Figure 51, the clock of input is the clock that is reproduced by clock withdrawal device 1103, and (2) also import the synchronizing signal that is detected by reproducing signal treatment circuit 1104.Timing generator 1411 imports initialization random number series according to these, as described in example 8 above, generates and output random number generation clock.

In the information reproduction apparatus of embodiment 8, being input in the secondary information detector 1108 is that the phase encoding modulation phase closes series, but in the information reproduction apparatus of present embodiment, and importing in the secondary information detector 1108 is phase-coded signal (Figure 41 F).In addition, the action of the information reproduction apparatus of present embodiment is the same with the information reproduction apparatus of embodiment 8.

(embodiment 11)

Use accompanying drawing to describe embodiments of the invention 11 in detail.

The something in common of the CD of present embodiment and the foregoing description 8,9 is to write down main information by record mark, writes down secondary information by making record mark to microdisplacement (swing) radially.In addition, be, the frame that makes the record mark swing is divided into a plurality of of specified length, make the cycle of record mark swing all different in each piece with the difference of the CD of embodiment 8,9.

The information record carrier of present embodiment is described with reference to Figure 42-Figure 44 here.As shown in figure 42, the information record carrier of present embodiment replaces timing generator 401 and the phase encoding modulator 405 except that possessing timing generator 421 and XOR425, and other information record carrier with embodiment 8 is the same.

Timing generator 421 does not resemble and generates phase-coded signal the timing generator 401 of embodiment 8, but generates the basis displacement signal.XOR425 is to implementing from the displacement control signal of XOR404 with from the basis displacement signal of timing generator 421 " different " computing, its result as displacement control signal, is outputed to radial modulation device 408.

As shown in figure 43, the timing generator 421 of present embodiment has frequency divider 421a, counter 421b, conversion form 421c.Frequency divider 421a16 frequency division recording clock (Figure 44 A) generates byte clock (Figure 44 B) thus, and outputs to randomizer 403 sum counter 421b.Counter 421b imports the byte clock from initial value " 0 " at every turn, and all will be worth increases by 1, and outputs to conversion form 421c.This Counter Value is represented piece sequence number (Figure 44 D).Conversion form 421c uses piece sequence number and random number (Figure 44 C) to decide the cycle of basis displacement control signal (Figure 44 E).The random number of Figure 44 C is identical with random number series from randomizer 403.

For example in the example of Figure 44, the basis displacement control signal cycle of the 1st clock (piece sequence number " 0 ") is 16T, the basis displacement control signal cycle of the 2nd clock (piece sequence number " 1 ") is 8T, and the basis displacement control signal cycle of the 3rd clock (piece sequence number " 2 ") is 4T.In addition, with regard to each piece, the basis displacement control signal is that the length of an interval degree summation of " Low " equates with the length of an interval degree summation of " High ".

Therefore, in the present embodiment, will make the frame of record mark swing be divided into a plurality of of specified length, and make the cycle difference that makes the record mark swing in each piece, thereby, also be difficult to detect hunting period even observe by frequency spectrum analyser.Therefore, can realize being difficult to decipher the CD of secondary information or bootlegging.

The following describes the information reproduction apparatus of present embodiment 11.Figure 52 is the block diagram of main composition of the information reproduction apparatus of expression present embodiment.In Figure 52,, omit its detailed description to having and the additional reference marks identical of the piece of the same function of information reproduction apparatus (with reference to Figure 51) of embodiment 10 with embodiment 10.

Among Figure 52, the 1421st, timing generator, basic identical with the structure of Figure 42, timing generator 421 shown in Figure 43, but be with the difference of timing generator 421, (1) shown in Figure 52, the clock of input is the clock that clock withdrawal device 1103 reproduces, and (2) also import the synchronizing signal that is detected by reproducing signal treatment circuit 1104.In addition, the information reproduction apparatus of present embodiment also possesses randomizer 1422 and XOR1423.

In the information reproduction apparatus of embodiment 10, import in the secondary information detector 1108 is phase-coded signal, but in the complete information reproduction apparatus of this enforcement, the random number series (from the output of randomizer 1422) that will upgrade by the byte clock by the synchronizing signal initialization and by the XOR1423 computing and be input to secondary information detector 1108 from the result's of the basis displacement signal of timing generator 1421 outputs displacement control signal.In addition, the action of the information reproduction apparatus of present embodiment is the same with embodiment 10.

(embodiment 12)

Use accompanying drawing to describe embodiments of the invention 12 in detail.

The something in common of the CD of present embodiment and the foregoing description 8,9 is to write down main information by record mark, writes down secondary information by making record mark to microdisplacement (swing) radially.In addition, be, the frame that makes the record mark swing be divided into n of specified length (n for greater than 4 natural number) piece with the difference of the CD of embodiment 8,9, the cycle that makes the record mark swing to every m (m be n 1 beyond approximate number) the piece difference.

The information record carrier of present embodiment is described with reference to Figure 45-Figure 47 here.As shown in figure 45, the information record carrier of present embodiment replaces timing generator 401 and the phase encoding modulator 405 except that possessing timing generator 451 and modulation signal maker 455, and other information record carrier with embodiment 8 is the same.

In the information record carrier of present embodiment, timing generator 451 generates byte clock (Figure 46 B) by 16 frequency division recording clocks (Figure 46 A), outputs to randomizer 403.Randomizer 403 outputs to XOR404 with the 1 bit random number series (Figure 46 C) of " 0 " or " 1 ".XOR404 by calculate the secondary information of 1 bit that should be recorded in this frame (Figure 46 D) with from the random number series of randomizer 403 " exclusive " or " ", generate displacement control signal (Figure 46 E), output to modulation signal maker 455.

Modulation signal maker 455 is according to displacement control signal, generate modulation signal (Figure 46 G), make each by m piece constitute during in (Figure 46 F) hunting period difference, and the summation of the burst length of the modulation signal " Low " in during each equates with " High " length of an interval degree summation.In example shown in Figure 46, m is 3, and n is 3 multiple.

Figure 47 represents the example that the inside of modulation signal maker 455 constitutes.Among Figure 47,455a is a serial-to parallel converter, and 455b is the conversion form, and 455c is a parallel-to-series converter.

Thereby, in the present embodiment, the frame that makes the record mark swing is divided into n (n is the natural number greater than 4) piece of specified length, make every m (m be n 1 beyond approximate number) make the cycle difference of record mark swing in the piece, thereby, even, also be difficult to the wobble detection cycle by frequency spectrum analyser observation.Therefore, can realize being difficult to decipher the CD of secondary information or bootlegging.

(embodiment 13)

As shown in figure 48, the something in common of the CD of the CD of present embodiment and embodiment 8 is per 3 frames to 2-the 25th frame (#1-#24), by making record mark to microdisplacement (swing) radially, writes down the secondary information of 1 bit.In addition, be with the difference of embodiment 8, the CD of present embodiment in the 1st frame (#0) and the 26th frame (#25), by with the swing same period in different cycle of the record mark of 2-the 25th frame, the essential information of the secondary information of record-playback.As reproducing the essential information of secondary information, for example consider the CRC of secondary information etc., but be not limited thereto.

As an example, be made as under the situation of 16T in hunting period the record mark of 2-the 25th frame, consider to swing by the record mark that makes the 1st frame (#0) and the 26th frame (#25) with the 8T cycle, write down the CRC of secondary information.

Thereby, for the frame that does not write down secondary information, by making record mark swing the essential information of the secondary information of record-playback with the cycle different with the hunting period of secondary information, thereby if different 16T swing, the 8T of frequency reproduction do not swing both, CD that then can not copy embodiment.Thereby, can prevent more really that CD is by bootlegging.

(embodiment 14)

The something in common of the CD of the CD of present embodiment and embodiment 8 is by making record mark write down secondary information to microdisplacement (swing) radially.In addition, as shown in figure 49, be that the record swing in the present embodiment CD is to swing the swing that generates by overlapping phases in the swing of secondary information virtual (dummy) different with the swing of secondary information with the difference of embodiment 8.

Thereby,,, also be difficult to extract the swinging signal of secondary information even observe the trail-and-error signal by frequency spectrum analyser by overlapping virtual swing.Therefore, can realize being difficult to decipher the CD of secondary information or bootlegging.

In order to generate the swing of this record, as shown in figure 50, the information record carrier of present embodiment in the information record carrier (with reference to Figure 18) of embodiment 8 phase encoding modulator 405 and radial modulation device 408 between totalizer 491 is set.Totalizer 491 can generate record swing shown in Figure 49 with the output and the virtual swinging signal addition that comes self-virtualizing swing generator 492 of phase encoding modulator 405.

By only disclosing the method for generation of the virtual swing in the virtual swing generator 492, can prevent the secondary information of bootlegging more really to regular drive maker.

In the foregoing description 8-14, example write down the CD of main information by record mark, so-called [record mark] comprise recessed or protruding mark both.

In addition, for the information reproduction apparatus of the optical storage media that reproduces embodiment 8-14, as described in embodiment 2, the reproduction result who is preferably in according to secondary information is judged as under the situation that optical storage media is not regular medium, takes to forbid measures such as output or warning.

The invention effect

As mentioned above, according to the present invention, can provide a kind of recording capacity that do not make to reduce, can correctly identify light Medium, and the light of illegal use optical storage media that can effectively prevent from being accompanied by the infringement of copyright deposit Storage medium and information recording// transcriber.

Claims (20)

1, a kind of information reproduction apparatus according to the record mark that forms in the CD, reproduces main information with the frame unit that follows synchronous code, it is characterized in that: have:

Radial phase difference test section, the radial displacement of detection record mark;

The clock extracting part extracts and this reproducing signal synchronization basic standard clock signal from the reproducing signal of described record mark;

The reproducing signal handling part detects described synchronous code, the described reproducing signal of demodulation from described reproducing signal;

Facies relationship column-generation portion, generating with the timing that detects described synchronous code is the relevant series of benchmark; With

Secondary information test section detects secondary information by the radial phase difference signal that is generated by described radial phase difference test section with described relevant series.

2, information reproduction apparatus according to claim 1 is characterized in that:

Described facies relationship column-generation portion is made of simulation random number series generating unit and phase encoding modulation portion at least;

To being benchmark with the timing that detects described synchronous code, carrying out the phase encoding modulation, generate described relevant series by the phase encoding modulation portion by the simulation random number series of described simulation random number series generating unit initialization generation.

3, information reproduction apparatus according to claim 2 is characterized in that:

Above-mentioned secondary information test section to from the output of above-mentioned radial phase difference test section, the above-mentioned record mark of expression is average to the signal accumulative total of radially displacement, detects above-mentioned secondary information.

4, information reproduction apparatus according to claim 3 is characterized in that:

Above-mentioned simulation random number series generating unit is come initialization according to constituting the beginning position that the unit that preserves address information is the sector by a plurality of above-mentioned frames by presetting with above-mentioned sector corresponding address information.

5, information reproduction apparatus according to claim 3 is characterized in that:

Above-mentioned simulation random number series generating unit is come initialization according to the detection timing of the above-mentioned synchronous code of giving the initial above-mentioned frame that detects above-mentioned secondary information by presetting the intrinsic identifying information of above-mentioned each CD.

6, information reproduction apparatus according to claim 1 is characterized in that:

Described facies relationship is listed in the interval of reproducing described record mark does not have change point.

7, information reproduction apparatus according to claim 1 is characterized in that:

Described secondary information test section uses the signal that obtains from the described displacement radially in a plurality of cycles to extract the described secondary information of at least 1 bit.

8, information reproduction apparatus according to claim 7 is characterized in that:

Described secondary information test section extracts the described secondary information of at least 1 bit by reproducing a plurality of described frames.

9, information reproduction apparatus according to claim 1 is characterized in that: also be provided with

Decision means, according to the testing result of described key information test section, can judgement permit the reproduction of the described main information of described CD; With

Parts are forbidden in reproduction, when described decision means is judged as the reproduction that can not permit described main information, forbid from described optical disc replay master information.

10, information reproduction apparatus according to claim 9 is characterized in that:

Described reproduction forbids that parts stop from described reproduction processing unit output signal.

11, information reproduction apparatus according to claim 9 is characterized in that: also be provided with

Described reproduction forbids that parts discharge the described CD that will reproduce from this information reproduction apparatus.

12, information reproduction apparatus according to claim 9 is characterized in that:

Also possess alarm features, be judged as the CD that will reproduce to reproduce the time, warn the irreproducible meaning of this CD in described decision means.

13, information reproduction apparatus according to claim 1 is characterized in that:

Fixed mode in the synchronous code of the frame synchronization that is used for obtaining at least described frame does not detect secondary information.

14, information reproduction apparatus according to claim 13 is characterized in that:

In the sector of giving the address information that constitutes by a plurality of described frames, in the particular frame of described sector, do not detect secondary information.

15, information reproduction apparatus according to claim 14 is characterized in that:

Described particular frame is the frame that has write down address information.

16, information reproduction apparatus as claimed in claim 14 is characterized in that:

Described particular frame is the frame of the beginning of described sector.

17, information reproduction apparatus as claimed in claim 14 is characterized in that:

Possesses light picker, this light picker is to by making flag column or optical storage media information being recorded in the CD irradiates light in control data zone with respect to the recessed or protruding ditch radial displacement of light incident side, and read main information and the secondary information that writes down in the described CD, the encrypted record of described main information, described optical storage media information comprise CD that the key information that is used to decipher described main information or expression be regular manufacturing or identifying information that can information reproduction;

Described secondary information test section is according to the secondary information of the input that is read by described optical picking-up head;

Also possess the demodulation parts, this demodulation parts basis is by the described main information of the detected secondary decrypts information of described secondary information test section.

18, information reproduction apparatus according to claim 1 is characterized in that:

The radial phase difference test section that is used to detect the signal of displacement diametrically is a differential operational portion.

19, information reproduction apparatus according to claim 1 is characterized in that:

The radial phase difference test section that is used to detect the signal of displacement diametrically is the phase place comparing section.

20, information reproduction apparatus according to claim 1 is characterized in that:

Described clock extracting part is used the signal clocking that obtains from flag column,

Described secondary information test section uses described clock signal to detect secondary information.

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