CN100485791C - Recording medium, wobble cycle detection method, wobble information detection method and circuit - Google Patents

Abstract

The invention provides a recording medium is characterized in that: track is divided into a first region wobbled continuously by a first wobble groove of a particular carrier cycle, an third region comprising a third wobble groove having the same sycle with that of the first wobble groove and having a 180 degree of phase offset with the first wobble groove, has a four times length of the particular carrier cycle, and a second region is composed of a second wobble groove having a cycle which is twice of the particular carrier cycle and having a twice length, which is distributed in a 180 degree of phase offset corresponding to data 0 and data 1 of the information to be stored by the wobble groove, wherein the third region is disposed at the previous one of the second region or near by.

Description

Recording medium, wobble cycle detection method, wobble information detection method and circuit

The application is dividing an application of following patented claim: application number: 200380107501.X, the applying date: 2003.12.26, denomination of invention: recording medium, wobble cycle detection method, wobble information detection method, wobble information detection circuit, information recording/reproducing apparatus

Technical field

The present invention relates to recording mediums such as inversion of phases, Worm type, optomagnetic type, for the wobble cycle detection method and the wobble information detection method of this recording medium, from the wobble information detection circuit and the information recording/reproducing apparatus of this recording medium wobble detection information.

Background technology

Form track in the posting field on the recording mediums (CD) such as DVD+R dish, DVD+RW dish.This track plays for recording of information and regeneration and the effect of the guiding groove of the luminous point of the laser that shines.

In this track, form swing (complications), because the signal that goes out from swing detection roughly has some cycles, so this detected swinging signal is mainly as rotary speed information.

In addition, by swing is modulated, also can in track, store described rotary speed information information in addition.As canned data by swing, the most general address information that the absolute position on the expression recording medium is arranged.

In addition, can enumerate recording medium characteristic, be the size of recording medium, or expression recording medium is the record type of Worm type or rewriting type, or recording characteristic, is the information such as parameter of optimum recording power or wave recording, or manufacturer's title etc.

The form of each swing of the recording medium (CD-R dish, CD-RW dish etc.) of CD class and the recording medium of DVD+ class (DVD+R dish, DVD+RW coil etc.) then, is described.

The recording medium of CD class: address information etc. is carried out bi-phase modulated, and make track wobble (for example, opening flat 9-212871 communique) with reference to (Japan) spy by frequency modulation (PFM) based on this.

Specifically, in the recording medium of CD class,, use the swing about 10 cycles to come recorded information to 1 (bit) to two kinds of frequencies of data 0 and data 1 distribution 22.05kHz ± 1kHz.In addition, clock signal is made as the probability of happening of data 0 and data 1 about equally, thereby detects from the 22.05kHz as this centre frequency.

The recording medium of DVD+ class: the address information equiphase is modulated, and make track wobble based on this.

In the recording medium of DVD+ class, detect clock signal thereby extract carrier component from the carrier wave swing that accounts for most carrier wave zone.Address information will be swung synchronous swing with carrier wave and will be made as data 0 in the address area, will be made as data 1 with (counter-rotating) swing of carrier wave swaying phase poor " 180 " degree, thus canned data.

But, have problem shown below respectively in the swing of the recording medium of the recording medium of described existing C D class and DVD+ class.

In the swing form of the recording medium of CD class, extract the clock signal of 22.05kHz, considerably less because the difference on the frequency of expression data 0 and data 1 is ± 1kHz, so thereby the S/N of signal is low recording of information poor quality.In addition, exist to be difficult to determine the correct of frequency change point, and the shortcoming of absolute positional accuracy difference.

On the other hand, in the form of the swing of the recording medium of DVD+ class, the logical S/N that uses phase modulation (PM) can improve signal.In addition, also can guarantee absolute positional accuracy, become new form by the carrier wave zone is set.

But, identical with swinging synchronously with the modulation system of the swing that information is used, carry out the difference of synchronizing signal and information signal by the difference that the swing of phase reversal is long, need the time so introduce synchronously.In addition, since by the cycle identical and only phase modulation (PM) come recorded information, so embody significantly in the deterioration that is incorporated in information signal of the wobble component of adjacent tracks, be difficult to guarantee simultaneously the reliability and the recording quality of detected information, and advance the densification of further narrow gauge spacing.

Summary of the invention

General purpose of the present invention be to provide a kind of improvement that solves described prior art problems useful recording medium, wobble cycle detection method, wobble information detection method, wobble information detection circuit, information recording/reproducing apparatus.

More detailed purpose of the present invention is to propose to guarantee the form of swing of densification, high reliability, the stability in the future in the recording medium, can detect the cycle and the information of the swing of this form simultaneously.

In order to reach this purpose, in the recording medium of the present invention, be divided on the structure of track: the first area, by first swing swing continuously in particular carrier wave cycle; And second area, to swing with second, this second swing decides phase place for the cycle different with described first swing and corresponding to data 0 and data 1 by the swing canned data.

In addition, in order to reach this purpose, in the wobble cycle detection method of the present invention, to the swinging signal that obtains according to the swing that is engraved in the track on the recording medium, pass through multiplier, to multiply each other between the identical signal, the signal input that will obtain by this phase multiplication be set to by frequency band in the bandpass filter of about twice of frequency of carrier wave, and the cycle of the twice of the output signal of this bandpass filter is the cycle of the carrier wave of swinging signal.

In addition, in order to reach this purpose, wobble information detection method of the present invention comprises: the carrier processing step, from the first area of recording medium, extract the frequency component of first swing; The special Wave treatment step extracts the phase information component of second swing from the second area of described recording medium; And information detection step, based on the frequency component of extracting by described carrier processing step, from the phase information component that extracts by described special Wave treatment step, detect by swinging canned data.

In addition, in order to reach this purpose, wobble information detection circuit of the present invention comprises: hunting period testing circuit, the cycle of detected carrier from the swinging signal that obtains according to the swing that is engraved in the track on the recording medium; Clock signal generating circuit based on the cycle by the detected carrier wave of this testing circuit hunting period, generates the second clock signal of two doubling times of carrier wave; And the special Wave wobble detection circuit, based on second position or the phase place of swinging of the described second area of described second clock signal indication.

In addition, in order to reach this purpose, information recording/reproducing apparatus of the present invention carries wobble information detection circuit, based on the visit of being undertaken by the detected information of this wobble information detection circuit the target location of described recording medium, thereby described recording medium is carried out recording of information and regeneration.

Recording medium of the present invention, wobble cycle detection method, wobble information detection method, wobble information detection circuit, information recording/reproducing apparatus, propose the form of the swing of a kind of densification that can guarantee the future in the recording medium, high reliability, stability, can detect the cycle and the information of the swing of this form simultaneously.

The invention provides a kind of recording medium, it is characterized in that, track is divided into: first area, the swing continuously by first swinging chute in particular carrier wave cycle; The 3rd zone, comprise identical with the described first swinging chute cycle and with the 3rd swinging chute of the described first swinging chute phase differential 180 degree, have 4 times the length in described particular carrier wave cycle; And second area, constitute by second swinging chute, this second swinging chute is 2 times the cycle in described particular carrier wave cycle and 2 times length, the data 0 and the data 1 of canned data corresponding to passing through swinging chute, respectively with differ from 180 the degree phase assignments, the previous of described second area or near described the 3rd zone of configuration.

The present invention also provides a kind of recording medium, it is characterized in that, track is divided into: first area, the swing continuously by first swinging chute in particular carrier wave cycle; The 3rd zone, comprise identical with the described first swinging chute cycle and with the 3rd swinging chute of the described first swinging chute phase differential 180 degree, have 4 times the length in described particular carrier wave cycle; And second area, comprise second swinging chute and have 4 times the length in described particular carrier wave cycle, this second swinging chute is 2 times the cycle in described particular carrier wave cycle and 2 times length, the data 0 and the data 1 of canned data corresponding to passing through swinging chute, relative occurrence positions is made as 2 times position leaving carrier cycle, simultaneously respectively with differ from 180 the degree phase assignments, the previous of described second area or near described the 3rd zone of configuration.

The present invention also provides a kind of wobble cycle detection method, is used for a kind of recording medium, and the track of this recording medium is divided into: first area, the swing continuously by first swing in particular carrier wave cycle; Second area is swung with second, and this second swing has the cycle different with described first swing and decides phase place corresponding to the data 0 and the data 1 of the canned data by swing; And the 3rd zone, comprise can with the 3rd swing of described first swing and the second swing difference, this method comprises: the carrier processing step, from the first area of described recording medium, extract the frequency component of first swing; The special Wave treatment step extracts the phase information component of second swing from the second area of described recording medium; The synchronous processing step is extracted the phase information component of the 3rd swing from the 3rd zone of described recording medium; And information detection step, based on the frequency component of extracting by described carrier processing step, detect canned data by the phase information component that from described special Wave treatment step and described synchronous processing step, extracts respectively.

The present invention also provides a kind of wobble information detection method, is used for a kind of recording medium, and the track of this recording medium is divided into: first area, the swing continuously by first swing in particular carrier wave cycle; Second area is swung with second, and this second swing has the cycle different with described first swing and decides phase place corresponding to the data 0 and the data 1 of the canned data by swing; And the 3rd zone, comprise the 3rd swing that to swing difference with described first swing and second, this method comprises: the carrier processing step, from the first area of described recording medium, extract the frequency component of first swing, and generate 2 times the clock in described particular carrier wave cycle and described particular carrier wave cycle; The special Wave treatment step, the phase information component of from the second area of described recording medium, swinging based on 2 times the Clock Extraction second in described particular carrier wave cycle at least; The synchronous processing step, the phase information component of from the 3rd zone of described recording medium, swinging based on the Clock Extraction the 3rd in described particular carrier wave cycle; And information detects step, based on the phase information component that extracts by this synchronous processing step, from the phase information component that extracts by specific described special Wave treatment step the described second area of position, detects the canned data by swinging.

The present invention also provides a kind of wobble information detection circuit, is used for a kind of recording medium, and the track of this recording medium is divided into: first area, the swing continuously by first swing in particular carrier wave cycle; Second area is swung with second, and this second swing has the cycle different with described first swing and decides phase place corresponding to the data 0 and the data 1 of the canned data by swing; And the 3rd zone, comprise the 3rd swing that to swing difference with described first swing and second, this wobble information detection circuit comprises: hunting period testing circuit, the cycle of detected carrier from the swinging signal that obtains according to the swing that is engraved in the track on the described recording medium; Clock signal generating circuit, based on cycle by the detected carrier wave of this testing circuit hunting period, the second clock signal of first clock signal in the cycle of generation carrier wave and two doubling times of carrier wave; Synchronization signal detection circuit detects the 3rd synchronizing signal of swinging of representing described the 3rd zone based on described first clock signal; The position signalling generative circuit is a benchmark with described synchronizing signal, and the position signalling of the described second area of expression takes place; And the special Wave wobble detection circuit, according to described position signalling, based on second position or the phase place of swinging of the described second area of described second clock signal indication.

Description of drawings

Other purpose, feature and advantage of the present invention, reading the following description simultaneously by the reference accompanying drawing can further to define.

Figure 1A～B is the figure of structure that represents also to be applicable to the general recording medium of one embodiment of the present invention.

Fig. 2 A～B is the key diagram of phenomenon of the amplitude change of the swinging signal in the recording medium of embodiments of the invention.

Fig. 3 is the key diagram of the form of the swing that forms in the track of recording medium of expression the 1st embodiment to the 4 embodiment of the present invention.

Fig. 4 is the key diagram of the form of the swing that forms in the track of recording medium of expression the 1st embodiment to the 4 embodiment of the present invention equally.

Fig. 5 a～d is the figure of an example of position 1 the wobble shape of the position 0 of expression data 0 of recording medium of difference embodiments of the invention and expression data 1.

Fig. 6 a～c is the example as the special Wave swing of the recording medium of embodiments of the invention, the oscillogram of the trochoidal wave form example of the integral multiple in the cycle of expression carrier wave swing.

Fig. 7 a～d is made as the twice of carrier wave swing and the oscillogram of trochoidal wave form that changed the situation of length in cycle of special Wave swing of the recording medium of expression embodiments of the invention.

Fig. 8 is the key diagram of the form of the swing that forms on the track of recording medium of expression the 8th embodiment to the 10 embodiment of the present invention.

Fig. 9 is the key diagram of the form of the swing that forms on the track of recording medium of expression the 8th embodiment to the 10 embodiment of the present invention equally.

Figure 10 a～e is the key diagram of the form of the swing that forms on the track of recording medium of expression the 8th embodiment to the 10 embodiment of the present invention equally.

Figure 11 a～e is the key diagram of the form of the swing that forms on the track of recording medium of expression the 14th embodiment of the present invention.

Figure 12 a～d is the figure of the waveform of the swing that is provided with in the carrier wave zone of concentrating the recording medium of expression embodiments of the invention, address area, the retaining zone.

Figure 13 a～c is the figure of the waveform of the shape of the swing in the recording medium of expression the 11st embodiment of the present invention and the 12nd embodiment and the signal by this swing detection.

Figure 14 a～b be the expression wobble cycle detection method of realizing the 24th embodiment of the present invention hunting period testing circuit structure and its background technology hunting period testing circuit the block scheme of structure.

Figure 15 a～c is the oscillogram of the signal waveform of the swinging signal of expression input multiplier 32 shown in Figure 14 and its output signal.

Figure 16 a～b is the key diagram of form of track of the recording medium of expression the 13rd embodiment of the present invention and the 14th embodiment.

Figure 17 a～c is the figure of the wobble shape in two kinds of synchronizing cycles of recording medium of expression embodiments of the present invention.

Figure 18 a～b is the form of track of recording medium of expression the 13rd embodiment of the present invention and the 14th embodiment and the figure of the wobble shape in two kinds of synchronizing cycles.

Figure 19 a～d is the key diagram of concrete wobble modulations example in the recording medium of expression the 19th embodiment to the 21 embodiment of the present invention.

Figure 20 a～d is the key diagram of concrete wobble modulations example in the recording medium of expression the 19th embodiment to the 21 embodiment of the present invention equally.

Figure 21 a～d is the key diagram of concrete wobble modulations example in the recording medium of expression the 19th embodiment to the 21 embodiment of the present invention equally.

Figure 22 is the block scheme of structure of the wobble information detection circuit of expression the 30th embodiment to the 35 embodiment of the present invention.

Figure 23 a～1st, expression is with the oscillogram of the output waveform of each circuit of the situation of the recording medium regeneration of the swing form of the Class1 shown in Figure 12 in the wobble information detection circuit shown in Figure 22.

Figure 24 a～k is that expression uses the SIN ripple signal of the condition of phase place 0 degree in the wobble information detection circuit shown in Figure 22 and phase place 180 degree to carry out the oscillogram of waveform of output signal of the each several part of the situation of modulating.

Figure 25 a～f is the key diagram of form of the recording medium of the 15th embodiment of the present invention and the 16th embodiment.

Figure 26 a～f is the figure for the explanation of the simplest method of checking phase state by the wobble information detection circuit of the 32nd embodiment and the 33rd embodiment.

Figure 27 a～d is the oscillogram of wobble shape example of form of the recording medium of expression the 18th embodiment of the present invention.

The oscillogram of the signal waveform of the situation that Figure 28 a～o is expression with the wobble shape demodulation of the type A of Figure 27.

Figure 29 is the block scheme of structure of the information recording/reproducing apparatus of expression the 36th embodiment of the present invention and the 37th embodiment.

Figure 30 A～B is the key diagram from the photo detector 94 of Figure 29 to the detection of the swinging signal of computing circuit 102.

Figure 31 is the block scheme with wobble information detection circuit generalities shown in Figure 22.

Embodiment

Below, specify based on accompanying drawing and to be used to implement optimum way of the present invention.

Fig. 1 is the figure of structure that expression is applied to the general recording medium of one embodiment of the present invention.

This recording medium 1 is CDs such as DVD+R dish, DVD+RW dish, shown in Fig. 1 (a), on record surface track 2 is formed concentric circles or spiral fashion.This track 2 is made of groove 3 and bank 4 shown in Fig. 1 (b).

This track 2 forms device by recording medium and makes in advance, and pen recorder carries out recording of information and regeneration along the track 2 of recording medium.

In addition, as rotation information, under the situation of rotating with a certain linear velocity or a fixed angular speed, groove 3 swings (complications) of track 2 are so that can detect certain frequency (some cycles) in the recording medium.This swing part is called swing.

In CD-R dish, CD-RW dish or DVD+R dish, DVD+RW dish, the swing of this track 2 is made as roughly certain frequency, the part that frequency or phase place change a little is set simultaneously, thus information such as recording address.

In addition, shown in Fig. 1 (a), it is wavy that the shape of swing mostly is usually, as long as but can to extract carrier component just passable, and for example also can be saw shape shape, triangular wave shape, trapezoidal shape etc.

By frequency or the phase place that changes aforesaid swing, the also positive reception and registration of carrying out information in the communications field.In order in communication, can to use a plurality of channels, and transmitting terminal and the employed reference frequency of receiving end are fixed, almost do not had the oscillator of frequency variation output etc. to make carrier component so can use.

Certainly, extract carrier component from the signal of transmission sometimes yet, but be the inching degree, the communication medium frequency does not change.And then the characteristic of this communication path has the interference (noise) of frequency band at random, but can not mix regularly in the band interference identical with the employed frequency band of communication.

On the other hand, difference aspect these in recording mediums such as CD.In recording medium, keep certain control of rotating, but only use the low motor of slow-roll stabilization degree for the lighting of propulsion plant and miniaturization.Thereby recording medium is rotated instability, change of line speed usually.

Therefore, extract carrier component need the swing on recording medium, must can follow the trail of the demodulation of the information of the variation of rotating the linear velocity that changes as benchmark.

Another big difference is that the carrier frequency of swinging has mixing of steady noise., the recording density that makes the track on the recording medium dwindles interorbital interval for bringing up to the limit, owing to be narrower than the diameter of luminous point, so the end of luminous point covers the swing of adjacent tracks.Therefore, the wobble component of adjacent tracks is mixed (this is called ' crosstalking ').This interference that is meant the frequency band identical with the signal of wanting demodulation is mixed.In this case, the swinging signal of detection amplitude change owing to this influence.

Fig. 2 is the key diagram of phenomenon of the amplitude change of the swinging signal in the recording medium.Shown in Fig. 2 (a), swing at track (being called ' the target track ') 2a that shines luminous point SP, the swing of Lin Jin adjacent tracks 2b and 2c is under the situation of same-phase (homophase) with it, signal is cancelled each other, so the amplitude of the swinging signal of the swing of the irradiating and detecting by luminous point SP reduces.

On the other hand, shown in Fig. 2 (b), be to strengthen mutually under the situation of antiphase (anti-phase) in the swing of the swing of the track 2d of irradiation luminous point SP and contiguous with it adjacent tracks 2e and 2f, so the amplitude increase of the swinging signal of the swing of the irradiating and detecting by luminous point SP.

That is, the notion of not crosstalking in the communications field can be carried out the transmission of the theoretical limit calculated near interference noise is made as at random, but only can obtain low-down signal quality in the system of the swing of service recorder medium.

For example, in the DVD+R/RW of CD form, even the stability that the also demanding information of this low quality detects adopts 2 phase phase modulation methods.

But, as synchronously with swing with in the synchronizing signal of phase reversal " 180 " degree etc., only this inversion section be and near carrier wave is swung opposite swinging signal characteristic.

Because the major part of swing is the carrier wave swing, so crosstalk components also may be thought of as carrier component.Specifically, the carrier wave swing part at target track is that the amplitude of detected most swinging signal is big under the anti-phase situation with contiguous swing.But, only phase reversal synchronous be in-phase conditions with swing part, so cancel each other, amplitude reduces.

Thereby by the phase modulation (PM) of carrier cycle, because the baneful influence of crosstalking, the deviation of demodulation result is big, S/N worsens.In the DVD+ class, by this phase modulation method, not only store synchronizing information, and storage address information and record medium information, so the demodulation performance of information reduces a little.But, because synchronizing information is a some cycles, so even demodulation performance reduces a little, also can interpolation.

That is, need strong especially modulation system for crosstalking of the problem that is not considered as problem in the communications field.

Fig. 3 and Fig. 4 are the key diagrams of the form of the swing that forms on the track of recording medium of expression the 1st embodiment to the 4 embodiment of the present invention.

Shown in Fig. 3 and Fig. 4 are common, the recording medium of the 1st embodiment to the 4 embodiment forms the address area (below be also referred to as ' second area ') 11 of the carrier wave zone that accounts for the most of zone in the track (below be also referred to as ' first area ') 10 and a part in orbit.

The carrier wave swing of the swinging signal of carrier wave zone 10 by detecting a some cycles and a phase bit (below be also referred to as " first swing ") 14 is swung continuously.

Owing in this carrier wave zone 10, can detect stable swinging signal, so be used for the generation of clock.In the detection of swing, not only describedly crosstalk but also also become noise by the recorded information component of user record, so need with its frequency separation.

Because according to the frequency characteristic of testing circuit mode or recorded information, thus can not stipulate without exception, but the cycle of general carrier wave swing is about 20～200 times of the recorded information reference clock cycle.

In addition, if oversize more than this (frequency is low), then near the control frequency band of the servo-drive system of the position control check point (luminous point) of in orbit requirement, so can't carry out swing detection.

Address area 11 needs two kinds of wobble shapes of expression " 0 " (below be also referred to as " data 0 ") and " 1 " (below be also referred to as " data 1 ") for recording address information.

In the recording medium of the 1st embodiment, swing by special Wave swing (below be also referred to as " second swing ") address area 11, this special Wave swing detection has and the different cycle of carrier wave swing (below be also referred to as " first swing ") the 14 carrier wave swinging signals that detect (below be also referred to as " first swinging signal "), and the data 0 by canned data and data 1 have the special Wave swinging signal (below be also referred to as " second swinging signal ") of different respectively phase places.

In the recording medium of the 2nd embodiment, as shown in Figure 3, swing by special Wave swing 12 address area 11, this special Wave swing detection has the different cycle of detecting with carrier wave swing 14 of carrier wave swinging signal, and the special Wave swinging signal with data 0 pairing phase place of canned data.Perhaps swing by special Wave swing 13, this special Wave swing detection has the different cycle of detecting with carrier wave swing 14 of carrier wave swinging signal, and the special Wave swinging signal with data 1 pairing phase place of canned data.

Promptly, swing by special Wave swing 12 and 13 address area 11, this special Wave swing detection has the different cycle of detecting with carrier wave swing 14 of first swinging signal, and has the swinging signal that differs from 180 phase places of spending respectively by the data 0 and the data 1 of canned data.Like this, under the situation of phase differential 180 degree that make the special Wave swing according to information (situation of distributing the phase place that differs from 180 degree respectively), data 0 are distributed phase place 0 degree, distribute phase place 180 degree the simplest to data 1, certainly, respectively data 0 are distributed 90 degree, distribute 270 also can data 1.

In addition, as shown in Figure 4, address area 11 also can by combined carriers swing 14 and special Wave swing, this special Wave swing detection has the different cycle of detecting with this carrier wave swing 14 of carrier wave swinging signal, and has the swinging signal that differs from 180 phase places of spending respectively by the data 0 and the data 1 of canned data.In the figure, the situation of expression special Wave swing 12 that the special Wave swinging signal of data 0 pairing phase place with canned data is detected.

In addition, in the recording medium of the 3rd embodiment, 1 pairing special Wave swing 13 makes occurrence positions different with data by the special Wave swing 12 corresponding to the data 0 of described information.

And then in the recording medium of the 4th embodiment, data 0 pairing special Wave swing 12 and data 1 pairing special Wave swing 13 by described information relatively make occurrence positions difference cycle portions separately.

In addition, in the recording medium of the 5th embodiment, cycle of described special Wave swing is made as the integral multiple in the cycle of described carrier wave swing.Thereby, by cycle of the special Wave swinging signal of this special Wave swing detection be integral multiple by the cycle of the carrier wave swinging signal of described carrier wave swing detection.

And then, in the recording medium of the 6th embodiment, cycle of described special Wave swing is made as 2 times of cycle of described carrier wave swing.Thereby, by cycle of the special Wave swinging signal of this special Wave swing detection be 2 times by cycle of the carrier wave swinging signal of described carrier wave swing detection.

In addition, in the recording medium of the 7th embodiment, the length of described special Wave swing is made as 2 times of cycle of described carrier wave swing.Thereby, be 2 times by the length of the carrier wave swinging signal of described carrier wave swing detection by the length of the special Wave swinging signal of this special Wave swing detection.

Fig. 5 is the position (Bit) 0 of the described data 0 of expression difference expression and the figure of an example of the wobble shape of the position (Bit) 1 of expression data 1.

Fig. 5 (a) be with #0 to #8 represent with the carrier wave hunting period on the track be the figure of the relative position of benchmark.

Fig. 5 (b) expression difference provides the wobble shape example of the position 1 of the position 0 of expression data 0 of situation of information and expression data 1 to the position of special Wave swing.

Fig. 5 (c) expression difference provides the wobble shape example of the position 1 of the position 0 of expression data 0 of situation of information and expression data 1 to the phase place of special Wave swing.

The wobble shape example of the position 0 of the expression data 0 of the situation that Fig. 5 (d) expression difference all provides information to the position and the phase place of special Wave swing and the position 1 of expression data 1.

Here, as special Wave swing, expression has 2 doubling times (2 times the cycle in the cycle of carrier wave swinging signal) of carrier wave swing, and has the situation of wobble shape of length of 2 times the length (length of carrier wave swinging signal 2 times) of carrier wave swing.

At first, providing the information of wobble shape in being stored in track of the situation of information to the position of the special Wave shown in Fig. 5 (b) swing is the position (Bit) 0 o'clock of data 0, in the position configuration carrier wave swing of #0, the #1 of track, #4, #5, #6, #7, #8, will be configured in the #2 of track, the position of #3 with the continuous special Wave swing 20 of this carrier wave swaying phase.In addition, in the position (Bit) 1 o'clock that is data 1,, this carrier wave swing and the continuous special Wave of phase place are swung 20 be configured in the #4 of track, the position of #5 in the position configuration carrier wave swing of #0, the #1 of track, #2, #3, #6, #7, #8.

Like this, any one of the phase place on the throne 0 of special Wave swing and the situation of position 1 down, all with the carrier wave swing continuously, but because both occurrence positions differences, so can detect separately information.Here, represented to change the situation of occurrence positions by position 0 and position 1, more simply, can by in the position configuration of #2, the #3 of track the swing special Wave swing and that not have configuration come differentiation bits 0 and 1.

For example, the timing that is in " 90 " degree in the phase place of special Wave swing can be distinguished by differentiating swinging signal voltage.But by changing the occurrence positions of special Wave swing, quantity of information increases, so more increased correctness.

Then, providing the information of wobble shape in being stored in track of the situation of information to the phase place of the special Wave shown in Fig. 5 (c) swing is the position 0 o'clock of data 0, in the position configuration carrier wave swing of #0, the #1 of track, #4, #5, #6, #7, #8, will be configured in the #2 of track, the position of #3 with the continuous special Wave swing 20 of this carrier wave swaying phase.In addition, be data 1 the position 1 o'clock, the position configuration carrier wave swing of same #0, #1 at track, #4, #5, #6, #7, #8, the special Wave swing 21 that will have the phase place of phase place and special Wave swing 20 poor " 180 " degree is configured in the #2 of track, the position of #3.That is, represent swing in the recording medium of the 1st embodiment, the 2nd embodiment, the 3rd embodiment, the 5th embodiment, the 6th embodiment, the 7th embodiment.

Like this, on the throne 0 and position 1 situation under, the occurrence positions of special Wave swing is made as identical, but position 0 and 1 is made as the relation of counter-rotating, thereby in testing circuit described later, can carries out high-quality information detection by phase change " 180 " degree with both.

Then, the information of wobble shape in being stored in track of the situation that provides information to the position and the phase place of the special Wave shown in Fig. 5 (d) swing is the position 0 o'clock of data 0, in the position configuration carrier wave swing of #0, the #1 of track, #4, #5, #6, #7, #8, will be configured in the #2 of track, the position of #3 with the continuous special Wave swing 20 of this carrier wave swaying phase.In addition, in the position 1 o'clock that is data 1, in the position configuration carrier wave swing of #0, the #1 of track, #2, #3, #6, #7, #8, the special Wave that will have a phase place of spending phase place and special Wave swing 20 poor " 180 " is swung 21 and is configured in the #4 of track, the position of #5.That is, represent swing in the recording medium of the 1st embodiment, the 3rd embodiment, the 4th embodiment, the 5th embodiment, the 6th embodiment, the 7th embodiment.

Like this, by making up described position and phase place, the #2 that uses track so quantity of information increases, can improve reliability by well-designed demodulator circuit to #5.

With described same, can be used for 2 cycles of special Wave swing whole 4 cycles of carrier wave swing, but in this case, the special Wave swing accounts for all ratios to be increased, the special Wave wobble component increases in crosstalking.Use in the effect of special Wave swing of 2 doubling times, because that crosstalk components accounts for the major part of carrier component is very important, so should reduce the special Wave swing as far as possible.But if special Wave swing is fully long at interval, then its defective reduces, so that special Wave swung for 2 cycles is also passable.

Then, further specify the length in the cycle in the recording medium of the 5th embodiment.

Fig. 6 is the example as above-mentioned special Wave swing, the oscillogram of the trochoidal wave form example of the integral multiple in the cycle of expression carrier wave swing.

Fig. 6 (a) expression has the wobble shape of special Wave swing 22 of swing in cycle in 2 times (2 cycles) in the cycle of carrier wave swing 14.

Fig. 6 (b) expression has the wobble shape of special Wave swing 23 of swing in cycle in 3 times (3 cycles) in the cycle of carrier wave swing 14.

Fig. 6 (c) expression has the wobble shape of special Wave swing 24 of swing in cycle in 4 times (4 cycles) in the cycle of carrier wave swing 14.

In addition, to be expression with cycle of described special Wave swing be made as 2 times of carrier wave swing to Fig. 7 and change the oscillogram of the trochoidal wave form of long situation.

Fig. 7 (a) expression is made as 2 times of (2) cycles in the cycle of carrier wave swing 14, has the wobble shape of special Wave swing 25 of swing of length in 1 cycle of carrier wave swing 14.

Fig. 7 (b) expression is made as 2 times of (2) cycles in the cycle of carrier wave swing 14, has the wobble shape of special Wave swing 26 of swing of length in 2 cycles of carrier wave swing 14.

Fig. 7 (c) expression is made as 2 times of (2) cycles in the cycle of carrier wave swing 14, has the wobble shape of special Wave swing 27 of swing of length in 3 cycles of carrier wave swing 14.

Fig. 7 (d) expression is made as 2 times of (2) cycles in the cycle of carrier wave swing 14, has the wobble shape of special Wave swing 28 of swing of length in 4 cycles of carrier wave swing 14.

Like this, when cycle of special Wave swing being made as the integral multiple in cycle of carrier wave swing, can swinging by special Wave and avoid the influence of crosstalking and the reference clock that calls from the clock generating solution that generates by the carrier wave swing easily.

In addition, also can give 1 of information with 1 period allocated of special Wave swing, but also can be as described like that more than or equal to 2 cycles.But except described defective, minimizing can be stored in the quantity of information in the swing when increasing 1 of information long, so should shorten as far as possible.Therefore, 2 times the cycle (2 doubling time) and 2 times the length in the cycle of carrier wave swing are the most effective.

Then, in the recording medium of the 8th embodiment, formation in orbit comprises and can swing the synchronous with the retaining zone of swinging of difference with described carrier wave swing and described special Wave.

In addition, in the recording medium of the 9th embodiment, described synchronous being made as with described carrier wave swing with swing had the identical cycle, and differ from 180 shapes of spending with described carrier wave swaying phase.

And then, in the recording medium of the 10th embodiment, in orbit, described retaining zone is configured in the previous of described address area.

In addition, in the recording medium of the 11st embodiment, in the previous described carrier wave zone that disposed of described retaining zone.

And then, in the recording medium of the 12nd embodiment, the length that is configured in the previous described carrier wave zone of described retaining zone is made as 5 times the length in the cycle of swinging more than or equal to described carrier wave.

In addition, in the recording medium of the 13rd embodiment, in track with the described retaining zone of certain arranged spaced, simultaneously to described retaining zone discontinuously and near the configuration described address area.

And then, in the recording medium of the 14th embodiment, being positioned near the synchronous length of the described retaining zone of described address area with swing, the synchronous length with swing of the described retaining zone of configuration is different separately with separating with described address area.

Fig. 8 to Figure 10 is the key diagram of the form of the swing that forms on the track of recording medium of expression the 8th embodiment to the 10 embodiment of the present invention, for giving identical label with the common part of Fig. 3 and Fig. 4.

The recording medium of the 8th embodiment to the 10 embodiment forms the carrier wave zone (first area) 10, the zone, a part of address (second area) 11 that account for the most of zone in the track in orbit, comprise can with the synchronous retaining zone 15 of the special Wave swing difference of the carrier wave swing of carrier wave zone 10 swings and swing in address area 11 (below be also referred to as " the 3rd zone ") with swing (below be also referred to as " the 3rd swings ").

In this retaining zone 15 synchronous with swing detection synchronously with the synchronizing signal of swinging signal as the place (position) in presentation address zone 11.

Thereby what comprise in the retaining zone 15 is synchronous with the shape that swing preferably has and carrier wave is swung or the special Wave swing is different, can distinguish with these swings.

For example, as shown in Figure 8, synchronous in the recording medium of the 8th embodiment to the 10 embodiment preferably be made as with carrier wave swing 14 with swing 16 length that has same period, have 1 cycle of carrier wave swing 14, with the waveform of the phase place of phase differential 180 degree of carrier wave swing 14.In this case, in retaining zone 11, will be configured in front end with swing 16 synchronously, dispose carrier wave swing 14 thereafter continuously.

In addition, also can change above-mentioned synchronous occurrence positions with swing 16.For example, as shown in Figure 9, also can configuration synchronization swing 16 in the swing 14 of the carrier wave in the retaining zone 11.Represented to have used in the address area 12 of this figure the situation of special Wave swing 12 among the figure.

In addition, shown in Figure 10 (c), also can 16 length that are made as 2 cycles of carrier wave swing will be swung synchronously.In any case, so long as the carrier wave swing just can with using the swing difference synchronously.

Figure 11 is the key diagram of the form of the swing that forms on the track of recording medium of expression the 14th embodiment of the present invention.

In the recording medium of the 14th embodiment, need two kinds synchronously with under the situation of swinging, shown in Figure 11 (d) and Figure 11 (e), as long as the synchronous of the length in 1 cycle of use carrier wave swing uses the synchronous of length in 4 cycles of swing 16 and carrier wave swing to use swing 16 ' just passable.Especially, if identical and long difference is distinguished by the cycle, then demodulator circuit also can be shared, correctly grasps the position relation with the address area simultaneously easily.About the special Wave among Figure 11 swing, shown in Figure 11 (d) and Figure 11 (e), represent the waveform in the recording medium of the 2nd embodiment and the 4th embodiment.

Figure 12 is the figure that concentrates the waveform of the swing that is provided with in the described carrier wave of expression zone, described address area, the described retaining zone.

Figure 13 is the figure of the waveform of the shape of the swing in the recording medium of expression the 11st embodiment and the 12nd embodiment and the signal that detects according to this swing.

Figure 13 (b) is illustrated in the synchronous shape with the swing of the carrier wave swing 14 in insertion 3 cycle carrier wave zones between special Wave swing 13 (or 12) of swing 16 and address area of retaining zone.

In addition, Figure 13 (c) is illustrated in the synchronous shape with the swing of the carrier wave swing 14 in insertion 3 cycle carrier wave zones between special Wave swing 12 (or 13) of swing 16 and address area of retaining zone.

In order to extract the carrier wave swinging signal (carrier component) of carrier wave swing from swing shown in Figure 13, by bandpass filter (BPF) with unwanted noise excision, the output binaryzation of this BPF is sent to clock and generates parts, but in the modulation portion of swing the signal confusion.Though also according to the characteristic of BPF, chaotic generation during the number carrier wave.

Figure 14 be the expression wobble cycle detection method of realizing the 24th embodiment of the present invention hunting period testing circuit structure and its background technology hunting period testing circuit the block scheme of structure.

Shown in Figure 14 (a), in the general hunting period testing circuit, to the hunting frequency (fw) with swinging signal is bandpass filter (BPF) 30 input swinging signals by frequency band, with its output signal by the PLL circuit that is sent to the back level after binarization circuit (COMP) 31 binaryzations.Thereby removing high fdrequency component in this PLL circuit generates and the swinging signal clock signal synchronous.On the characteristic of this BPF30, under the situation of importing address area shown in Figure 1 or phase modulation (PM) as synchronous zone or frequency modulated signal, be made as the carrier wave swinging signal, thereby produce the confusion of the output of one number time, this confusion also makes a very bad impression to the PLL circuit of back level.

In (under the situation of the swing that 3 cycles of insertion carrier waves are swung between the synchronous special Wave with swing and address area of retaining zone is swung) under the situation of the swing shown in Figure 13 (c) (two), because swing and special Wave swing synchronously is approaching, output from the BFP30 that represents the cycle that carrier wave is swung is chaotic continuously, so the action instability of PLL circuit is destroyed easily to the synchronization of clock signals of swinging signal.

Therefore, under the situation of general BPF30, because cycle recovery after 3 cycles in the carrier wave swing, so by minimum 5 cycle of insertion carrier wave zone between retaining zone and address area, the signal in the cycle of expression carrier wave swing recovers temporarily, can stablize the action of PLL circuit.

Figure 15 is the oscillogram of the signal waveform of the swinging signal of expression input multiplier 32 shown in Figure 14 and its output signal.

Shown in Figure 14 (b), equally import swinging signal (swinging signal that Figure 15 (a) and Figure 15 (b) respectively represent) two input terminals of multiplier 32 in the testing circuit hunting period of wobble cycle detection method of realizing the 24th embodiment.That is, carry out the computing of the power of swinging signal, but as its multiplication result, the phase modulation (PM) part that yet can be extracted in the cycle of carrier wave swing there is not chaotic signal (with reference to Figure 15 (c)) fully by multiplier 32.

But,,, be made as the clock of carrier wave wobble component behind 2 frequency divisions so the operating frequency of passing through frequency band and PLL circuit of BPF33 is made as 2 times frequency because frequency is 2 times of swinging signal.If use it, then, need between retaining zone and address area, not insert long carrier wave zone owing to the continuous labile factor that becomes the clock signal of problem of retaining zone and address area alleviates.

The recording medium of the 13rd embodiment disposes described retaining zone at certain intervals in track, simultaneously to described retaining zone discontinuously and near the configuration described address area.

In addition, in the recording medium of the 14th embodiment, be positioned near the synchronous length with swing of the described retaining zone of described address area, the synchronous length with swing of the described retaining zone of configuration is different separately with separating with described address area.

Figure 16 is the key diagram of form of track of the recording medium of expression the 13rd embodiment and the 14th embodiment.

On the track of the recording medium of the 13rd embodiment and the 14th embodiment, shown in Figure 16 (b), configuration synchronization zone (only being expressed as the zone of ' synchronously ' among the figure) 15 at certain intervals, simultaneously to retaining zone 15 discontinuously and near configuration address zone (being expressed as the zone of ' AD ' among the figure) 11.

In addition, shown in Figure 16 (a), also can retaining zone 15 and address area 11 is certain for configuration.

For example, in the common form in recording mediums such as DVD+R dish, DVD+RW dish, shown in Figure 16 (a), be one group of close configuration with retaining zone 15 and address area 11.Address area 11 certainly main Input Address information, if but quantity of information has residue also can import the information such as characteristic of recording medium, so need to insert continually as far as possible.

But, as mentioned above, from retaining zone 15 and address area 11 be one group the zone only by hunting period testing circuit detect the signal in chaotic cycle.Thereby,, do not make the insertion frequency of address area too much in order from the carrier wave swing, to extract the stable clock signal.

The confusion in the cycle in retaining zone and the address area has been described, but certainly disposed separately swing only 1 cycle by phase modulation (PM) the situation of retaining zone under, the confusion of two-value signal of expression hunting period is also little, and nearly all in the clock forming circuit of back level, be removed, so not to the clock generating baneful influence.If retaining zone is disposed continually, the time of then seeing retaining zone for the first time is also short, and the back will narrate, and can carry out the bit comparison mutually of SIN ripple signal (fw) and SIN ripple signal (fw/2) continually, so early detection swing displacement, thereby the processing that can proofread and correct.Thereby best and address area is only inserted retaining zone independently continually.

Figure 17 is the figure of the wobble shape in two kinds of retaining zones of expression.

In addition, shown in Figure 16 (b), as by with in groups retaining zone of address area 11 (note is done ' retaining zone A ' among the figure) 15, with be clipped in the carrier wave zone 10, with address area 11 away from and the retaining zone (note is made ' retaining zone B ' among the figure) 15 ' that exists individually changes the example of the situation of wobble shape, expression has changed the example of the number of phase modulation (PM) swing among Figure 17.

The number of ' x ' of ' #x ' of record is that front end swing with retaining zone 15 is made as the 0th and at the number of each periodicity of carrier wave swing among Figure 17 (a).For by can judging correct swing position with the retaining zone 15 of the 11 one-tenth configuration set in address area, the phase modulation (PM) in 1 cycle of the carrier wave of preferred ' #0 ' swing, i.e. 1 modulation of swinging.

But, survey in order to prevent the flase drop that noise causes by independent retaining zone 15 ', and for the segmentation of clear and definite presentation address information, and use phase modulation (PM), i.e. 2 modulation of swinging in 2 cycles that the carrier wave of ' #0 ' and ' #1 ' different with retaining zone 15 swings.

Figure 18 is the form of track of recording medium of expression the 13rd embodiment and the 14th embodiment and the figure of the wobble shape in two kinds of retaining zones.

Figure 18 (a) presentation address zone 11 and retaining zone 15 are in groups near the example that disposes.Figure 18 (b) represents configuration synchronization zone 15 at certain intervals in addition, and configuration address zone 11 examples discontinuously.

Among Figure 18 (b), each configuration address zone 11 to twice retaining zone 15 and 15 ', but be not limited thereto certainly, as long as according to the quantity of information that is stored in the address area, or used the synchronous introducing speed of retaining zone, or be stored in the segmentation of the information in the swing, determine that the ratio in independent configuration synchronization zone is just passable.

For example, if to improve synchronous introducing speed or to check that the swing displacement is a purpose, be frequency configuration address zone preferably smaller or equal to 10 with retaining zone.In addition, if according to the segmentation that is stored in the information in the swing, then preferably every 50～100 insertions.

The synchronous of the previous retaining zone 15 of the address area 11 shown in Figure 18 (b) carries out the phase modulation (PM) in 1 cycle of carrier wave swing with swing, separately the synchronous phase modulation (PM) of carrying out 4 cycles that carrier wave swings with swing of the retaining zone 15 ' of configuration.

For example, if, then be preferably between the address area with number configuration cycle zone smaller or equal to 10 groups to improve synchronous introducing speed or to check that the swing displacement is a purpose.The insertion frequency of this address area is determined by the necessary information amount, but is preferably about 50～100.This is because if consider with the security of general circuit design under the situation of the circuit of carrier wave extracted region clock, then for the total of the length of retaining zone and address area, need be made as about about 10 times.

Otherwise all the shared ratio in carrier wave zone is about 9 one-tenth in the swing, guarantees the operating stably of clock, further increases the storage retaining zone simultaneously, we can say that about limit is 1 one-tenth, so be made as smaller or equal to 10 groups.

Certainly, must be that retaining zone is very short, be 1～2 swing, and the action of clock forming circuit do not produced the mode (pattern) of big influence.Data is segmented into tens place in the information such as the common address of retaining zone.

The synchronous of the previous retaining zone 15 of the address area shown in Figure 18 (b) (AD zone) 11 carries out the phase modulation (PM) in 1 cycle of carrier wave swing 14 with swing 16, and the synchronous of the retaining zone 15 ' of configuration carries out the phase modulation (PM) that carrier wave is swung 4 cycles of 14 with swing 16 ' separately.

Then, the recording medium of the 19th embodiment forms in orbit: carrier wave zone, the swing continuously by the carrier wave swing in particular carrier wave cycle; Retaining zone comprises identical with carrier wave hunting period and differs from the synchronous swings of 180 degree with the carrier wave swaying phase, has 4 times the length in particular carrier wave cycle; And address area, be 2 times the cycle in particular carrier wave cycle and 2 times length, and the special Wave swing that has been assigned with the phase places that differ from 180 degree corresponding to the data 0 of the canned data by swing and data 1 respectively constitutes near the described retaining zone of previous or configuration of described address area.

The recording medium of the 20th embodiment is that the benchmark swing number that described synchronizing cycle is interregional is made as more than or equal to 60 with the carrier wave.

The recording medium of the 21st embodiment forms in orbit: carrier wave zone, the swing continuously by the carrier wave swing in particular carrier wave cycle; Retaining zone comprises identical with carrier wave hunting period and differs from the synchronous swings of 180 degree with the carrier wave swaying phase, has 4 times the length in particular carrier wave cycle; And address area, be included as 2 times the cycle in particular carrier wave cycle and 2 times length, and relative occurrence positions is located at 2 times position leaving carrier cycle with data 1 corresponding to data 0 by the swing canned data, be assigned with the special Wave swing of the phase place that differs from 180 degree simultaneously respectively, and has 4 times the length in particular carrier wave cycle, near the described retaining zone of previous or configuration of described address area.

Figure 19 to Figure 21 is the key diagram of the concrete wobble modulations example in the recording medium of expression the 19th embodiment to the 21 embodiment.Especially, Figure 20 is the key diagram of concrete wobble modulations example in the recording medium of expression the 19th embodiment, and Figure 21 is the key diagram of the concrete wobble modulations example in the recording medium of expression the 21st embodiment.

Shown in Figure 19 (a), at retaining zone (#0～#3) and insert portion of carriers zone (#4, #5) between address area (#6, #7).The situation that has disposed this retaining zone separately is called piece (BlockSync) synchronously, shown in Figure 19 (b), this synchronous phase modulation (PM) with the length of swinging 4 cycles of carrying out the carrier wave swing.

In addition, being configured near the synchronous of the retaining zone in address area is the length in 1 cycle of carrier wave swing with swing, in the address area, use the special Wave swing in 2 times cycle of carrier wave swing, for data 0 swing of distribution shown in Figure 19 (c), to data 1 swing of distribution shown in Figure 19 (d).In Figure 20 and Figure 21, be illustrated in the form that does not have between retaining zone and the address area across the situation in carrier wave zone.

Shown in Figure 20 (a), (#0～#3) and address area (#4, #5) are contiguous, insert portion of carriers zone (#4, #5) for retaining zone.The piece of this retaining zone (BlockSync) synchronously is same with Figure 19 (b).In addition, the synchronous of retaining zone is the length that the carrier wave swing is made as 1 cycle of carrier wave swing with swing, in the address area, use the special Wave swing in 2 times cycle of carrier wave, to data 0 swing of distribution shown in Figure 20 (c), to data 1 swing of distribution shown in Figure 20 (d).In addition, as shown in figure 21, to address region allocation #4～#7, to data 0, shown in Figure 21 (c), distribute the special Wave swing at #4 and #5, to data 1, shown in Figure 21 (d), distribute the special Wave swing different also passable with described special Wave swaying phase at #6 and #7.

In addition, in the recording medium of the 22nd embodiment, be benchmark with the carrier wave swing, the swing number between described retaining zone is made as more than or equal to 80.

And then, in the recording medium of the 23rd embodiment, described retaining zone synchronous is made as 1 cycle in cycle of described carrier wave swing with swing long and 4 cycles are long, 1 cycle in cycle that near previous or retaining zone synchronous that is configured in described address area is made as the swing of described carrier wave with swing is long, and 4 cycles that are made as the cycle that described carrier wave swings in addition are long.

The processing of the wobble information detection method of the action of wobble information detection circuit of the 30th embodiment to the 35 embodiment and the 25th embodiment to the 29 embodiment in this wobble information detection circuit then, is described.

Figure 22 is the block scheme of structure of the wobble information detection circuit of expression the 30th embodiment to the 35 embodiment.

Figure 23 is the oscillogram of output waveform of each circuit of situation of recording medium of the swing form of the type shown in Figure 12 (Type) 1 in the expression regeneration wobble information detection circuit shown in Figure 22.

The wobble information detection method of the 25th embodiment is carried out in wobble information detection circuit shown in Figure 22: from the carrier processing step of the frequency component of the carrier wave extracted region carrier wave swing of the recording medium of described the 1st embodiment to the 14 embodiment and embodiment described later; Extract the special Wave treatment step of the phase information component of special Wave swing from the address area of described recording medium; And based on the frequency component of being extracted by described carrier processing step, the information that detects the canned data by swing from the phase information component that is extracted by described special Wave treatment step detects step.

The wobble information detection method of the 26th embodiment is carried out in wobble information detection circuit shown in Figure 22: from the carrier processing step of the frequency component of the carrier wave extracted region carrier wave swing of the recording medium of described the 8th embodiment to the 14 embodiment and embodiment described later; Extract the special Wave treatment step of the phase information component of special Wave swing from the address area of described recording medium; From the retaining zone of described recording medium, extract the synchronous processing step of using the phase information component of swing synchronously; And based on the frequency component of being extracted by described carrier processing step, the information that detects by the phase information component canned data that extracts respectively from described special Wave treatment step and described synchronous processing step detects step.

The wobble information detection method of the 27th embodiment is in wobble information detection circuit shown in Figure 22, carry out:, and generate the carrier processing step of 2 times the clock in described particular carrier wave cycle at least from the frequency component of the carrier wave extracted region carrier wave swing of the recording medium of described the 8th embodiment to the 14 embodiment and embodiment described later; From the address area of described recording medium, at least based on the special Wave processing sequence of the phase information component of 2 times of the described particular carrier wave cycle Clock Extraction special Wave swing; And the information that detects the canned data by swing from the phase information component that is extracted by this special Wave processing sequence detects step.

The wobble information detection method of the 28th embodiment is in wobble information detection circuit shown in Figure 22, carry out:, and generate the carrier processing step of 2 times the clock in described particular carrier wave cycle and described particular carrier wave cycle from the frequency component of the carrier wave extracted region carrier wave swing of the recording medium of described the 8th embodiment to the 14 embodiment and embodiment described later; From the address area of described recording medium, at least based on the special Wave processing sequence of the phase information component of 2 times of the described particular carrier wave cycle Clock Extraction special Wave swing; From the retaining zone of described recording medium, use the synchronous processing step of the phase information component of swing synchronously based on the Clock Extraction in described particular carrier wave cycle; And based on the phase information component that is extracted by this synchronous processing step, the information that detects by the swing canned data from the phase information component that is extracted by specific described special Wave treatment step the address area of position detects step.

The wobble information detection method of the 29th embodiment is in wobble information detection circuit shown in Figure 22, carry out simultaneously in described address area, based on the phase place of the clock detection swinging signal in described particular carrier wave cycle or first demodulation of frequency, with based on the phase place of 2 times the clock detection swinging signal in described particular carrier wave cycle or second demodulation of frequency, and judge data 0 and data 1 by the swing canned data based on these two demodulation result.

As shown in figure 22, by the bandpass filter (BPF) 41 that carrier component is passed through, and the testing circuit 40 hunting period that constituted of binarization circuit (COMP) 42 extracts the carrier component of swinging signals.This, testing circuit also can use testing circuit hunting period of the wobble cycle detection method of realizing the 24th embodiment hunting period.

With the clock forming circuit 50 of the signal of this carrier component input based on phase-locked loop circuit (PLL circuit) 51, remove high frequency and low frequency component, and generate to follow the trail of the fw signal (first clock signal) of the hunting frequency of carrier component, generate the fw/2 signal (second clock signal) of 1/2 frequency (2 doubling time) of fw signals by 1/2 frequency generation circuit 52.

Swinging signal is desirably the signal of some cycles, but because beat (jitter) (noise or recording medium are rotated the timeliness vibration that change causes) arranged, so the cycle of carrier component changes knifeedge.It is removed high fdrequency component by clock forming circuit 50, and make the change of its trace lines speed.

On the other hand, after having removed the low-frequency noise in the swinging signal, send to synchronization signal detection circuit 60 and address signal testing circuit 70 by Hi-pass filter (HPF) 70.

This synchronization signal detection circuit 60 is main to be detected the carrier wave swing that is contained in the carrier wave zone and is contained in the modulation portion in the synchronous cycle of swinging with carrier waves such as swings in the retaining zone.

Also can be used for the carrier cycle demodulation partly that the address area comprises.

In addition, address signal testing circuit 70 main 2 times modulation portion that detect the carrier cycles such as special Wave swing of address area are not only to use address information.

For example, if four-range described later the 4th swing is then also can detect it by 2 doubling times of carrier wave.If the synchronous of synchronizing cycle is 2 doubling times of carrier wave swing with swing, then also can detect it.In addition, under special Wave swing situation for 2 times cycle of carrier wave swing, generate the clock signal in 2 times the cycle that carrier waves swing by clock forming circuit 50, but under other the situation of integral multiple, generate the clock signal of this integral multiple, and be made as the second clock signal.

In addition, clock forming circuit 50 can have the phase place of differentiating the second clock signal and polarity and the function adjusted, also can carry in addition.

Under the situation of carrying in addition, polarity discriminating circuit is as shown in figure 22 differentiated the phase place of second clock signal based on the demodulation result of synchronizing signal or the 4th swing.According to this result, the polarity or the phase place of the output of the second clock signal of adjustment clock forming circuit 50, or the processing polarity of the address information processing (omission diagram) of level after cooperating.

In synchronization signal detection circuit 60, remove unwanted high frequency noise by low-pass filter (LPF) 61, simultaneously in SIN circuit 62, generate synperiodic SIN ripple signal (fw signal), and carry out multiplying by 63 pairs of output signal and SIN ripple signals (fw) of multiplier from LPF61 according to first clock signal.Figure 23 (f) represents this signal waveform.

The waveform of the each several part of timing is understood in Figure 23 (a)～Figure 23 (g) expression by the SIN ripple signal (fw) of swing carrier cycle by synchronization signal detection circuit.

The number of the writing #x of the swing number shown in Figure 23 (a) is that the front end swing with retaining zone is the 0th number at every carrier cycle issue in explanation, the swing number of the expectation of Figure 23 (h) is considered the delay of demodulator circuit, is the front end swing of retaining zone should detected position be made as the 0th and the number of number.

In addition, thick line is represented frequency or phase modulating part, and in the address area, solid line is represented Data_0, and dotted line is represented the situation of Data_1.

When signal mobile is described, the multiplication result of swinging signal and SIN ripple signal (fw) carries out integral operation by integrator (∫) 64 at each carrier cycle, sample by 65 pairs of integral results of sampling hold circuit (S/H), the time of carrying out carrier cycle keeps.

In this case, the output of S/H65 is synchronizing signal when-side.In second swing of 2 doubling times, integral result is 0.

The sampled signal (Sample) of reset signal of integrator 63 (Reset) and S/H65 in the output signal of S/H65 by the timing action (with reference to Figure 23 (f)) of zero expression.These generally generate in clock forming circuit 50, also working timing in address location signal generating circuit 81 once.At the #0 of swinging signal the phase reversal portion of synchronous portion is arranged, so, in address location signal generating circuit 81, synchronous #6 and the #7 that takes place with swing exported the address location signal that is used for ad-hoc location based on this synchronizing signal.

On the other hand, also carry out roughly the action same in the address signal testing circuit 70 with synchronization signal detection circuit 60.

But SIN wave period is the cycle of second clock signal.The explanation of the waveform here is shown in Figure 23 (h)～Figure 23 (1).

In this case, on swing position, at #6, #7 part as the special Wave swing of 2 doubling times of address information is arranged, the output signal of S/H75 also the delayed carrier wave swing 1 cycle and change, phase place according to the special Wave swing becomes plus or minus, and expression can detect.Owing to the carrier wave swing in the cycle of swinging or synchronously with detecting 0 in the swing, so under the specific situation of the position that the special Wave of not carrying out position signalling is swung, not only plus or minus also needs 0 differentiation at carrier wave.The words of the not posting field that signal quality is good are no problem, but unfavorable to the differentiation of the many posting fields of noise component.Thereby preferably the use location signal carries out the plus or minus differentiation of the position of special Wave swing existence.

Wobble information detection circuit shown in Figure 22 is to use the demodulator circuit of synchronous detection mode, but the delay detection mode by known technology realizes also having no relations in the communications field.

In addition, in described explanation, the method that simulation ground carries out multiplying to SIN ripple signal has been described, but also can have replaced the SIN ripple and use 1 ,-1 square wave to carry out multiplying.In addition, also can be by analog-digital converter with the swinging signal digitizing, and use the generation that is stored in the treatment S IN ripples such as data among the ROM.Preferably Ci Shi quantization speed is more than or equal to 8 times of hunting period, and resolution is more than or equal to 5.

Figure 31 be with wobble information detection circuit generalities shown in Figure 22 block scheme.

By have Figure 22 hunting period testing circuit 40 and the carrier processing system 110 of the function that merges of clock forming circuit 50, synchronous processing system 111, the special Wave disposal system 112 with function of address signal testing circuit 70 with function of synchronization signal detection circuit 60 finish function respectively, can be from swinging signal the information extraction signal, and regeneration is stored in the information in the swing of recording medium.Synchronous processing system 11 must use the reference signal that is obtained by carrier processing system 110 to carry out Data Detection by special Wave disposal system 112, also can be by handling the function of this data dual-purpose synchronous processing system 11.

In waveform shown in Figure 23, also relate to general phase demodulating method and be illustrated, carried out under the situation of demodulation phase place and frequency that can the detected carrier component in first clock signal (fw signal) by carrier cycle.But this only is the also detected situation of crosstalking of carrier component.Because the major part of crosstalking is a carrier component, thus since with the swaying phase homophase of the track of target or anti-phase and swinging signal strengthens mutually or weakens mutually, but this former state reflection and become deviation in demodulation result.Watch the waveform by 2 times second clock signal (fw/2 signal) demodulation of a carrier cycle, for the swing of carrier component, no matter its phase place, demodulation result all is 0.That is, crosstalking of carrier component do not influence the demodulation of second clock signal.

Following proof on mathematics.

Trochoidal wave form is made as f (T).This condition is considered as following four.

(I) f (T)=sin (2T): the swing of carrier cycle

(II) f (T)=sin (2T) ± 0.2*sin (2T): the swing of carrier cycle+crosstalk (carrier component)

(III) f (T)=sin (T): 2 times swing of carrier cycle

(IV) f (T)=sin (T) ± 0.2*sin (2T): 2 times swing of carrier cycle+crosstalk (carrier component)

For these waveforms, (I under situation II), multiply by sin (2T) integration afterwards, and (III under situation IV), multiply by sin (T) integration afterwards, thereby can obtain demodulation result respectively in the demodulation of carrier cycle component in the demodulation of carrier cycle component.The both is 0～2 π between integration period, and this is 2 cycles of carrier wave, i.e. second 1 cycle of swing.

By relatively (I) and (II) and (III) and result (IV), investigate the difference of crosstalking and having or not.

Under the situation of the demodulation of (I), use the substitution of variable method be made as-during 2T=x, T=x/2, dt=dx/2 obtains following formula 1 and formula 2.

[formula 1]

∫ _0→2π)f(T)*sin(2T)dT

＝∫ _0→2π)sin^2(2T)dT

＝1/2*∫ _0→4π)sin^2(x)dx

[formula 2]

∫ _0→4π)sin^2(x)dx

＝[-sin(x)*cos(x)] _(0→4π)+∫ _0→4π)cos^2(x)dx

＝[-sin(2x)] _(0→4π)+∫ _0→4π)(1-sin^2(x))dx

＝∫ _0→4π)dx-∫ _0→4π)sin^2(x)dx

Obtain next formula 3 by formula 1, formula 2.Be formula 4.Thereby obtain formula 5.

[formula 3]

∫ _0→4π)sin^2(x)dx＝2π

[formula 4]

∫ _0→2π)sin^2(2T)dT＝π

[formula 5]

∫ _0→2π)f(T)*sin(2T)dT＝π

Under the situation of demodulation (II), obtain formula 7 from next formula 6 and described formula 4.

[formula 6]

∫ _0→2π)f(T)*sin(2T)dT

＝∫ _0→2π)((sin(2T)±0·2*sin(2T))*sin(2T))dT

＝∫ _0→2π)sin^2(2T)dT±0.2*∫ _0→2π)sin^2(2T)dT

[formula 7]

∫ _0→2π)f(T)*sin(2T)dT＝π±0.2π

Relatively the situation of (I) and demodulation (II) as a result the time, the influence of crosstalking of carrier wave wobble component shows in the demodulation result as can be known.

On the other hand, the demodulation of 2 doubling times of carrier wave swing is as follows.

Under the situation of the demodulation of (III), obtain following formula 8.In addition, the computation process from described formula 3 obtains formula 9.Thereby, obtain formula 10.

[formula 8]

∫ _0→2π)f(T)*sin(2T)dT

＝∫ _0→2π)sin^(2T)dT

[formula 9]

∫ _0→2π)sin^(2T)dT＝π

[formula 10]

∫ _0→2π)f(T)*sin(2T)dT＝π

Under the situation of the demodulation of (IV), obtain following formula 11.In addition, obtain formula 12 from described formula 9.In addition, obtain formula 13.Thereby, obtain formula 14.Then, obtain formula 15 from formula 12 and formula 14.

[formula 11]

∫ _0→2π)f(T)*sin(T)dT

＝∫ _0→2π)((sin(T)±0.2*sin(2T))*sin(T))dT

＝∫ _0→2π)sin^2(T)dT±0.2*∫ _0→2π)sin^2(T)*sin(T)dT

[formula 12]

∫ _0→2π)sin^(T)dT＝π

[formula 13]

∫ _0→2π)sin(2T)*sin(T)dT

＝2*∫ _0→2π)sin^2(T)*cos(T)dT

＝2*[sin^2(T)*sin(T)] _(0→2π)-4*∫ _0→2π)sin^2(T)*cos(T)dT

[formula 14]

∫ _0→2π)sin(2T)*sin(T)dT＝0

[formula 15]

∫ _0→2π)f(T)*sin(T)dT＝π

Relatively the situation of (III) and demodulation (IV) as a result the time, come to the same thing the influence of not crosstalked as can be known.Thereby, by 2 doubling time canned datas with carrier wave swing, the influence of the amplitude change that causes of can not being subjected to crosstalking and demodulating information.

As mentioned above, in address signal testing circuit 70, use the SIN ripple signal (fw/2 signal) of the second clock signal generation of 2 doubling times of swinging according to carrier wave to carry out demodulation.This second clock signal must be synchronous with first clock signal in cycle of the carrier wave swing used in the synchronization signal detection circuit 60, but its phase place can be got 0 degree and 180 two kinds of spending.

Figure 24 is that expression uses the SIN ripple signal of the condition that phase place 0 degree in the wobble information detection circuit shown in Figure 22 and phase place 18 spend to carry out the oscillogram of waveform of output signal of each several part of the situation of demodulation.

Figure 24 (d)～Figure 14 (g) expression phase place 0 degree, the situation of Figure 24 (h)～Figure 24 (k) expression phase place 180 degree.

When comparing both, the reversal of poles of the waveform that the output signal of multiplier is later.Promptly, waveform from the output signal of the integrator of the situation of the phase place shown in Figure 24 (f) 0 degree, with waveform reversal of poles from the output signal of the integrator of the situation of the phase place shown in Figure 24 (i) 180 degree, under the situation of the situation of 0 degree of the phase place shown in Figure 24 (g) and 180 degree of the phase place shown in Figure 24 (k), the polarity of waveform is also reversed as the output signal of the S/H of demodulation result.

Like this, according to first clock signal and second clock signal, promptly the synchronous regime of SIN ripple signal (fw signal) and SIN ripple signal (fw/2 signal) changes the polarity of demodulation result.

Beyond 2 doubling times of address area part, be 0 from the output signal of S/H, so only can't differentiate reversal of poles by the output signal of this address information testing circuit.Thereby the phase state of SIN ripple signal (fw signal) and SIN ripple signal (fw/2 signal) must remain on the state of a certain regulation.The state of this a certain regulation is meant, for example, can make swing #0 beginning and second clock signal, be that the rising edge or the negative edge of SIN ripple signal (fw/2 signal) is synchronous, also can be for the beginning of swing #0, the each alternate of rising edge and negative edge is ((toggle) state repeatedly) once.

The recording medium of the 15th embodiment and the 16th embodiment then, is described.

Figure 25 is the key diagram of form of the recording medium of the 15th embodiment and the 16th embodiment.

The allocation position and the detection waveform of the swing when the interregional swing number of Figure 25 (a)～Figure 25 (c) presentation address is swung for the odd number carrier wave.

The allocation position and the detection waveform of the swing when the interregional swing number of Figure 25 (d)～Figure 25 (f) presentation address is swung for the even number carrier wave.

In the recording medium of the 15th embodiment, be that benchmark is defined as even number with the swing number between the address area with the carrier wave swing so that in swing #0 certain second clock signal, be that the phase place of SIN ripple signal (fw/2 signal) is fixed.

Shown in Figure 25 (d), swing number between the address area is being made as under the situation of even number, shown in Figure 25 (f), at swing #0 at every turn is the phase place (a1 shown in the arrow, a2, a3 among the figure) of identical SIN ripple signal (fw/2 signal), so that the polarity of swing information signal also is decided to be is unique.

On the other hand, in the recording medium of the 16th embodiment, be that benchmark is defined as odd number with the swing number between the address area with the carrier wave swing, the polarity that is stored in the information in the address area record that in each continuous address area, alternately reverses.

Shown in Figure 25 (a), swing number between the address area is being made as under the situation of odd number, shown in Figure 25 (c), when swinging #0 at every turn and arriving, the phase reversal (b1 shown in the arrow, b2, b3 among the figure) of the SIN ripple signal (fw/2 signal) that generates based on the second clock signal.

Separate timing under this state, the alternating polarity ground of detected address demodulating data changes, and must every data demodulating data position (Bit) be reversed in the signal processing circuit of back level, thereby restore the information that is stored in the swing.Perhaps, also can SIN ripple signal (fw/2 signal) be reversed in each address area.

But, in any case all need complicated processing separating timing.Thereby the data that preferably are stored on the recording medium are that swing information row are cut apart in unit with information bit (Bit) number that can be stored in an address area in advance, carry out position (Bit) counter-rotating every these data 1 of having cut apart.Thus, because the swing number between the address area is an odd number, even also out of question in the reversal of poles of each address area SIN ripple signal (fw/2 signal).

In addition, the recording medium of the 17th embodiment is benchmark with the carrier wave swing, and the swing number between described retaining zone is made as more than or equal to the total of the length of the length of address area and retaining zone 10 times.

In the demodulation of this embodiment, for early detection swing displacement, and the swing number between the address area is irrelevant, and the phase place of SIN ripple signal (fw signal) and SIN ripple signal (fw/2 signal) should be by running check.

This be because, as mentioned above, beyond the address area, the output signal of address information testing circuit is 0, so can't differentiate polarity.

Figure 26 is the figure for the explanation usefulness of the simplest method of checking phase state in the wobble information detection circuit of the 32nd embodiment and the 33rd embodiment.

Use described synchronization signal detection circuit 60 to detect synchronizing signal (output signal of S/H).If detect the level of the two-value signal of SIN ripple signal (fw/2 signal) in the timing of this synchronizing signal, the phase place of the SIN ripple signal (fw/2 signal) in then can wobble detection #0.

Certainly, if the phase relation of SIN ripple signal (fw/2) and second clock signal is determined, then also can replaces two-value signal and use the second clock signal.

Because on form, the position of retaining zone and address area relation is determined, so also can carry out same polarity check near the address area that has postponed several swings based on the timing of synchronizing signal.

The polarity check of SIN ripple signal described above (fw/2 signal) is under perfect condition, if once check when demodulation begins then keep this state, so needn't check in retaining zone at every turn.

But on actual act, because interference such as the scar on the recording medium etc., the synchronous regime short time of swing and clock destroys, and the swing number between the address area may produce deviation.Be referred to as the swing displacement, if this swing displacement takes place then the phase relation deviation of SIN ripple signal (fw signal) and SIN ripple signal (fw/2 signal).Thereby, should check polarity in each retaining zone at every turn.

Then, in the recording medium of the 18th embodiment, in the 4th zone of the hunting period of position only leave to(for) retaining zone, configuration and irrelevant, the 4th swing of 2 times the cycle in the cycle that the fixing carrier wave of phase place and occurrence positions is swung and 2 times length by the swing canned data.

That is the swing part of 2 doubling times of the carrier wave of data independence, phase place and the stationkeeping of configuration and swing information.

Figure 27 is the oscillogram of wobble shape example of form of the recording medium of expression the 18th embodiment.

Type (Type) A shown in Figure 27 (c), in the front portion of the special Wave swing 12 in cycle of 2 times of #6 that is configured in the address area and #7, connect the part 12 ' of configuration and the special Wave swing 12 in swing information 2 times cycle that it doesn't matter, that have the carrier wave swing with carrier wave swing.

Type (Type) B shown in Figure 27 (d) is to the synchronous swing 16 in 1 cycle with carrier wave swing of the #0 that is configured in retaining zone, connects the part 12 ' of configuration and the special Wave swing 12 in swing information 2 times cycle irrelevant, that have the carrier wave swing.

Type (Type) 1 shown in Figure 27 (b) and is the employed wobble shape of described explanation as shown in figure 12.

In the method for the described phase place of each retaining zone being checked SIN ripple signal (fw/2 signal), generation that can the wobble detection displacement under the situation of 1 swing displacement if comparative result is correct once more but 2 swings are shifted, and can't detect.

Therefore, with the retaining zone is benchmark, to with swing (special Wave swing) while fixed position, the phase place of 2 doubling times of the swing information carrier wave that it doesn't matter swing, even thereby under the situation that the swing displacement has taken place, also can judge the polarity of swing information, and can detect correct swing information.Shown in type A and type B, the position of additional 2 doubling times part be preferably in retaining zone and address area near, and be preferably length about 1～2 swing of carrier wave swing, so that do not influence the extraction of carrier wave wobble component.

The oscillogram of the signal waveform of the situation that Figure 28 is expression with the wobble shape demodulation of the type A of Figure 27.The thick word of solid line among the figure is the situation of data 0 (Data_0), and the thick word of dotted line is the situation of data 1 (Data_1).

The swing number of swing number and expectation is with described identical.About the demodulation of SIN ripple signal (fw signal), be 0 level in the output signal of 2 new additional doubling time part S/H, in addition with described identical, do not do more explanation especially.

The phase place of Figure 28 (h)～Figure 28 (d) expression SIN ripple signal (fw/2 signal) is the waveform of the output signal of the each several part of the wobble information detection circuit of Figure 22 under 0 situation about spending.

The phase place of Figure 28 (1)～Figure 28 (o) expression SIN ripple signal (fw/2 signal) is the waveform of the output signal of the each several part of the wobble information detection circuit of Figure 22 under 180 situations about spending.

Usually phase place is 0 degree, but is thought of as 180 degree owing to the swing displacement takes place.

Originally, if phase place is 0 degree, then the output signal of the S/H of address area became the signal level of positive side shown in thick line among Figure 25 (k).

But, but being the words of 180 degree, phase place becomes the level of opposite minus side and reversal of poles, the output signal of the S/H of address area becomes the signal level of minus side shown in thick line among Figure 25 (o).In this case, survey if can not detect counter-rotating then become flase drop.

But with the demodulation result of the irrelevant 2 doubling times part of additional swing information, phase place is that 0 signal level when spending is decided to be minus side, and phase place is that 180 signal levels when spending are decided to be positive side, so the phase reversal of expression SIN ripple signal (fw/2 signal).

In addition, under the situation that 2 swings have been shifted, the signal of SIN ripple signal (fw/2 signal) is 0 degree, but the swing number of expectation and the position deviation of wobble demodulation data.

But, owing to go out known data bit (with the demodulation result of swing information 2 doubling times that it doesn't matter part) in the front-end detection of demodulating data, so it is also passable as triggering swing information to be carried out demodulation.Thereby, can detect and swing information 2 doubling times that it doesn't matter signal level partly, and judge the polarity and the position of the demodulation result of swing information portion.

Figure 29 is the block scheme of structure of the information recording/reproducing apparatus of the 36th embodiment of the present invention and the 37th embodiment.

This information recording/reproducing apparatus is divided into the light picker 90 that carries optical system, motor 100 and the various circuit that light picker 90 is moved and recording medium 107 is rotated.The light that has carried laser light source 91 in the light picker 90, laser light source 91 is taken place guides to the optics of each element, the object lens 92 of luminous point optically focused on recording medium 107 that make light, controls the actuator 93 and the photo detector 94 of the position of object lens 92 in order to make luminous point follow the trail of the position that requires.

In addition, have with lower member in the circuit.

Have: drive circuit for laser 101 makes laser light source 91 luminous electric current and waveform based on recorded information decision; Computing circuit 102, the reflected signal of accepting according to photo detector 94 from recording medium 107 comprise the signal operation of light-to-current inversion and swinging signal, RF signal, servosignal; And RF treatment circuit 103, based on this RF input regenerating information.This regenerating information is sent to demodulator circuit (owing to the known diagram of omitting) and is transformed to user data.

Wobble information detection circuit 104 is equivalent to described wobble information detection circuit, thus information and the clock signal of input swinging signal detection of stored in the swing of address information etc.Servosignal carries out various computings by servosignal testing circuit 105, and extracts the positional information of luminous points by servo processing circuit 106, makes motor 100 or light picker 90 or actuator 93 actions in order to make luminous point follow the trail of the position that requires.

Figure 30 is the key diagram from the photo detector 94 of Figure 29 to the detection of the swinging signal of computing circuit 102.

Shown in Figure 30 (b), the photo detector face is cut apart (regional 94a and 94b among the figure shown in A and the B) by 2 at least, and this cut-off rule 110 is parallel with the track 2 shown in Figure 30 (a).And, thereby carry out computing wobble detection signal by 102 pairs of differences of computing circuit from two output signals of two photo detector A49a and B94b.

In the form of the recording medium of embodiments of the invention, the SIN ripple signal (fw/2 signal) of 2 doubling times (1/2 frequency) that the SIN ripple signal (fw signal) and being used to that use is used to detect the carrier cycle of retaining zone (the 3rd zone) detects the carrier wave of address area (second area) detects synchronizing signal and information signal.

These SIN ripple signals can be the clock signals that generates according to the carrier component that obtains from swinging signal, also can make based on this clock signal.Under the synchronous situation of the SIN ripple signal (fw/2 signal) of employed 2 doubling times of the detection that makes the address area and swinging signal, when considering that 0 in phase place with swing be benchmark, the phase place of the SIN ripple signal (fw/2 signal) of 2 doubling times can be got 0 degree and 180 and be spent.Has the characteristic that is determined from the polarity of address area demodulated information (data) by this phase state.

That is, if the phase state of the SIN ripple signal (fw/2 signal) of swinging signal and 2 doubling times is remained on state based on a certain regulation, polarity that then can not judgment data, and can't carry out the detection of correct information.Therefore, under normal condition, the phase place of the SIN ripple signal (fw/2 signal) of swinging signal and 2 doubling times remained on state based on a certain regulation.

In addition, owing to the big reasons such as testing circuit noise of little scar on the recording medium or burst, be the situation that the short time can't the wobble detection signal though exist sometimes.

Under these circumstances, the number of the number of the swinging signal that should detect within a certain period of time and clock signal is misfitted sometimes.

For example, under the situation that is spaced apart 60 swings of retaining zone, can't wobble detection the time, clock signal a little early, when detected clock signal is the 59th in the next retaining zone.The number of the swinging signal that should detect in such certain hour and the number of clock signal are misfitted and are called the swing displacement.

Certainly, under the situation that big scar is arranged on the recording medium, tracking servo etc. are left and are departed from original access location, thus need begin from the generation of clock to carry out again, therefore outside the discussion scope.Therefore, in the present embodiment, tracking servo is normal, although continue the original track of visit, under the different situation of the number of number of swinging and clock, also can handle.In addition, also define for the synchronizing signal of in each information segmenting, inserting.

Recording medium, wobble cycle detection method, wobble information detection method, wobble information detection circuit, information recording/reproducing apparatus according to present embodiment, as the swing form of the high S/N that guarantees the demodulates information signal than, high positional precision, normal condition not only detects even swing displacement also can easily recover the to go forward side by side information of line stabilization takes place.

Like this, according to the recording medium of the 1st embodiment, can detect information high-qualityly, and can carry out the recovery of the high information of reliability.

In addition, according to the recording medium of the 2nd embodiment, owing to obtain the highest restituted signal of signal S/N, so can carry out the recovery of the high information of reliability.

And then, according to the recording medium of the 3rd embodiment, comprise information in phase place and the occurrence positions, obtain high-quality restituted signal, and can carry out the recovery of the high information of reliability.In addition, can increase quantity of information and in crosstalking, not increase the special Wave wobble component.

In addition, according to the recording medium of the 4th embodiment, can obtain signal S/N than the highest restituted signal, so can carry out the recovery of the high information of reliability.

And then, according to the recording medium of the 5th embodiment, can carry out clearly separating, so can detect good swinging signal with the frequency band that becomes recording information signal (than the high frequency of carrier wave) to the noise component of swinging signal.In addition, can easily from carrier component, obtain the employed clock signal of demodulation.

In addition,, guarantee greatlyyer, also can carry out separating simultaneously with the frequency band of recording information signal with being stored in quantity of information in the swing according to the recording medium of the 6th embodiment.

And then according to the recording medium of the 7th embodiment, special Wave swinging signal one fixes in the 1 cycle unit and finishes, owing to do not have the DC component, so that testing circuit becomes is easy.

And then, according to the recording medium of the 8th embodiment, can store new information, be synchronizing information swing with swing by synchronous, and the regeneration of recorded information is not had baneful influence.

And then, according to the recording medium of the 9th embodiment, preferably easily carry out the difference with special Wave swing, the structure of testing circuit is roughly the same with the detection of special Wave swing simultaneously, and then the detection that special Wave is swung does not have baneful influence.

In addition, according to the recording medium of the 10th embodiment, can correctly set the position of special Wave swing, and can carry out the detection of the high information of reliability in high quality.

And then, according to the recording medium of the 11st embodiment since when the introducing of synchronizing signal with the distance of special Wave swing and distinguish easily, so can introduce at high speed.In addition, retaining zone by after chaotic hunting period signal across the carrier wave zone in recover, so can stably keep the clock signal that signal generates according to hunting period.

In addition, according to the recording medium of the 12nd embodiment, in retaining zone, after the confusion, guarantee exalted carrier zone fully, and can stably keep the clock signal that signal generates according to hunting period by signal hunting period that bandpass filter is extracted.

And then, according to the recording medium of the 13rd embodiment, can carry out the storage of information and extract and do not have big influence for being used for carrier component that clock generates.In addition, can swing the detection of displacement continually.

In addition, according to the recording medium of the 14th embodiment, can easily carry out occurrence positions specific of special Wave swing, and can easily find the segmentation of information.

And then according to the recording medium of the 15th embodiment, the phase place of the employed reference signal of demodulation (second clock) is often fixing, and the polarity of restituted signal is decided to be unique.

In addition, recording medium according to the 16th embodiment, the phase place of the employed reference signal of demodulation (second clock) departs from 180 degree at each second area, consider the demodulating data counter-rotating and data on the operation record medium (media), do not need the counter-rotating of the reference signal on the demodulator circuit to handle, or with data processing such as demodulating data alternately reverse, the information of can carrying out simply detects.

And then, according to the recording medium of the 17th embodiment, can be fully little in the ratio of demodulation section carrier cycle confusion, and can obtain stable separating and call reference signal.

In addition,,, also can restore correct demodulating data, and can not make a mistake polarity and data are carried out flase drop survey even swing displacement more than or equal to 2 swings takes place according to the recording medium of the 18th embodiment.

And then, according to the recording medium of the 19th embodiment, can introduce synchronously at high speed, and can improve the reliability of information.

In addition, according to the recording medium of the 20th embodiment, can guarantee the stability of the reference signal (clock) of demodulation.

And then, according to the recording medium of the 21st embodiment, can introduce synchronously at high speed, and can improve the reliability of information.

In addition, according to the recording medium of the 22nd embodiment, can guarantee the stability of the reference signal (clock) of demodulation.

And then, according to the recording medium of the 23rd embodiment, two kinds can be easily differentiated, and high speed and introducing synchronously accurately can be carried out synchronously with the difference of swinging.

In addition, according to the wobble cycle detection method of the 24th embodiment, even also can stably keep clock and not make signal confusion hunting period in the zones that phase place and carrier wave differ from 180 degree.In addition, because can be near second area and the 3rd zone, so can not depart from the position of making a mistake second area owing to swing number by generations such as interference.

And then, according to the wobble information detection method of the 25th embodiment, can the information of detection of stored in the swing of the recording medium of the 1st embodiment and the 2nd embodiment.

In addition, according to the wobble information detection method of the 26th embodiment, can the information of detection of stored in the swing of the recording medium of the 3rd embodiment and the 4th embodiment.

And then, according to the wobble information detection method of the 27th embodiment, can the information of detection of stored in the swing of the recording medium of described each embodiment.

In addition, according to the wobble information detection method of the 28th embodiment, can the information of detection of stored in the swing of the later recording medium of described the 8th embodiment.

And then, according to the wobble information detection method of the 29th embodiment, can from the described the 3rd and the recording medium of the 4th embodiment detect the swing information of high-quality and high reliability.

In addition, according to the wobble information detection circuit of the 30th embodiment, can the information of detection of stored in the swing of the recording medium of described each embodiment.

And then, according to the wobble information detection circuit of the 31st embodiment, can the information of detection of stored in the swing of the later recording medium of described the 8th embodiment.

In addition, according to the wobble information detection circuit of the 32nd embodiment and the 34th embodiment, can be with the phase place of the reference signal of employed 2 doubling times of the demodulation of address area, polarity decision for unique, and demodulating data can be remained the polarity of requirement.

And then, according to the wobble information detection circuit of the 33rd embodiment and the 35th embodiment,, also can restore correct demodulating data, and can not make a mistake polarity and data are carried out flase drop survey even when the swing displacement takes place.

In addition,, the demodulation of good swing information can be carried out, and stable access performance can be obtained because the reliability of address information etc. is high according to the information recording/reproducing apparatus of the 36th embodiment.

And then, according to the information recording/reproducing apparatus of the 37th embodiment, can carry out for the high-quality swing information of recording medium and introduce synchronously stably, so can carry out high speed, high density, stable record and regeneration recording medium.

Utilizability on the industry of the present invention is that recording medium of the present invention can be applied to described light In the recording medium beyond the dish. In addition, wobble cycle detection method of the present invention, swing information detection side Method, wobble information detection circuit, information recording/reproducing apparatus be on the table type personal computer, pen also Remember in the personal computers such as this personal computer and use.

Claims (12)

1. a recording medium is characterized in that,

Track is divided into: first area, the swing continuously by first swinging chute in particular carrier wave cycle; The 3rd zone, comprise identical with the described first swinging chute cycle and with the 3rd swinging chute of the described first swinging chute phase differential 180 degree, have 4 times the length in described particular carrier wave cycle; And second area, constituting by second swinging chute, this second swinging chute is 2 times the cycle in described particular carrier wave cycle and 2 times length, corresponding to by swinging chute and the data 0 and the data 1 of canned data, respectively differing from the phase assignments of 180 degree,

The previous of described second area or near described the 3rd zone of configuration.

2. recording medium as claimed in claim 1 is characterized in that,

The described the 3rd interregional swing number is that benchmark is more than or equal to 60 with the carrier wave.

3. a recording medium is characterized in that,

Track is divided into: first area, the swing continuously by first swinging chute in particular carrier wave cycle; The 3rd zone, comprise identical with the described first swinging chute cycle and with the 3rd swinging chute of the described first swinging chute phase differential 180 degree, have 4 times the length in described particular carrier wave cycle; And second area, comprise second swinging chute and have 4 times the length in described particular carrier wave cycle, this second swinging chute is 2 times the cycle in described particular carrier wave cycle and 2 times length, the data 0 and the data 1 of canned data corresponding to passing through swinging chute, relative occurrence positions is made as 2 times position leaving carrier cycle, simultaneously respectively to differ from the phase assignments of 180 degree

The previous of described second area or near described the 3rd zone of configuration.

4. recording medium as claimed in claim 3 is characterized in that,

The described the 3rd interregional swing number is that benchmark is more than or equal to 80 with the carrier wave.

5. recording medium as claimed in claim 1 is characterized in that,

The 3rd swinging chute in described the 3rd zone has 1 cycle in described particular carrier wave cycle long or 4 cycles are long, the previous of described second area or near the 3rd swinging chute in described the 3rd zone of configuration be that described 1 cycle is long, be that described 4 cycles are long in addition.

6. a wobble cycle detection method is used for a kind of recording medium, and the track of this recording medium is divided into: first area, the swing continuously by first swing in particular carrier wave cycle; Second area is swung with second, and this second swing has the cycle different with described first swing and decides phase place corresponding to the data 0 and the data 1 of the canned data by swing; And the 3rd zone, comprise the 3rd swing with described first swing and the second swing difference,

This method comprises:

The carrier processing step is extracted the frequency component of first swing from the first area of described recording medium; The special Wave treatment step extracts the phase information component of second swing from the second area of described recording medium; The synchronous processing step is extracted the phase information component of the 3rd swing from the 3rd zone of described recording medium; And information detection step, based on the frequency component of extracting by described carrier processing step, detect canned data by the phase information component that from described special Wave treatment step and described synchronous processing step, extracts respectively.

7. a wobble information detection method is used for a kind of recording medium, and the track of this recording medium is divided into: first area, the swing continuously by first swing in particular carrier wave cycle; Second area is swung with second, and this second swing has the cycle different with described first swing and decides phase place corresponding to the data 0 and the data 1 of the canned data by swing; And the 3rd zone, comprise the 3rd swing with described first swing and the second swing difference,

This method comprises:

The carrier processing step is extracted the frequency component of first swing from the first area of described recording medium, and generates 2 times the clock in described particular carrier wave cycle and described particular carrier wave cycle; The special Wave treatment step, the phase information component of from the second area of described recording medium, swinging based on 2 times the Clock Extraction second in described particular carrier wave cycle at least; The synchronous processing step, the phase information component of from the 3rd zone of described recording medium, swinging based on the Clock Extraction the 3rd in described particular carrier wave cycle; And information detection step, based on the phase information component that extracts by this synchronous processing step, from the phase information component that extracts by the described special Wave treatment step the described second area, detect and pass through swing and canned data.

8. a wobble information detection circuit is used for a kind of recording medium, and the track of this recording medium is divided into: first area, the swing continuously by first swing in particular carrier wave cycle; Second area is swung with second, and this second swing has the cycle different with described first swing and decides phase place corresponding to the data 0 and the data 1 of the canned data by swing; And the 3rd zone, comprise the 3rd swing with described first swing and the second swing difference,

This wobble information detection circuit comprises:

Hunting period testing circuit, the cycle of detected carrier from the swinging signal that obtains according to the swing that is engraved in the track on the described recording medium; Clock signal generating circuit, based on cycle by the detected carrier wave of this testing circuit hunting period, the second clock signal of first clock signal in the cycle of generation carrier wave and two doubling times of carrier wave; Synchronization signal detection circuit detects the 3rd synchronizing signal of swinging of representing described the 3rd zone based on described first clock signal; The position signalling generative circuit is a benchmark with described synchronizing signal, and the position signalling of the described second area of expression takes place; And the special Wave wobble detection circuit, according to described position signalling, based on second position or the phase place of swinging of the described second area of described second clock signal indication.

9. wobble information detection circuit as claimed in claim 8 is characterized in that,

Each described synchronizing signal detects the phase place or the polarity of described second clock signal when taking place, and makes described second clock signal consistent with the phase place or the polarity of requirement according to its result.

10. wobble information detection circuit as claimed in claim 8 is characterized in that,

Each described synchronizing signal detects the phase place or the polarity of described second clock signal when taking place, and according to the polarity of its result's decision from described second area demodulated data.

11. wobble information detection circuit as claimed in claim 8 is characterized in that,

With four-range the 4th wobble demodulation in the described recording medium, and make described second clock signal consistent based on described second clock signal with the phase place or the polarity of requirement according to its result.

12. wobble information detection circuit as claimed in claim 8 is characterized in that,

Based on described second clock signal with four-range the 4th wobble demodulation in the described recording medium, and according to the polarity of its result decision from described second area demodulated data.

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