CN101046985A - Information recording method and apparatus, information reproducing method and apparatus, and recording medium - Google Patents
Information recording method and apparatus, information reproducing method and apparatus, and recording medium Download PDFInfo
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- CN101046985A CN101046985A CN 200710102554 CN200710102554A CN101046985A CN 101046985 A CN101046985 A CN 101046985A CN 200710102554 CN200710102554 CN 200710102554 CN 200710102554 A CN200710102554 A CN 200710102554A CN 101046985 A CN101046985 A CN 101046985A
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Abstract
A clock mark for extracting a clock when reproducing information from a recording medium and a synchronization mark for detection a bit-slip are recorded so that a part of the synchronization mark is identical to a pattern of the clock mark. Then, the bit-slip detection and the clock detection are performed simultaneously with a single mark by multi-value recording. The clock mark, the synchronization mark and a synchronization pull-in mark are recorded, the clock mark for extracting a clock when reproducing information from a recording medium, the synchronization mark for detecting a bit-slip, the synchronization pull-in mark for pulling in a phase synchronization at a position immediately after the synchronization mark. If a clock phase misalignment occurs when reproducing, the phase misalignment can be rapidly recovered by using the synchronization pull-in mark, and an error due to signal missing or the like is minimized.
Description
Patented claim of the present invention is dividing an application of following application for a patent for invention:
Application number: 200480011723.6; The applying date: on March 15th, 2004; Denomination of invention: information recording method and device, deck mechanism for magnetic recording/reproducing apparatus and device and recording medium.
Technical field
The present invention relates to the information recording and reproduction technology, particularly be used for the recording medium that is recorded in the deck mechanism for magnetic recording/reproducing apparatus of information in this recording medium and device in the information recording method of the many-valued level mode of the recording medium recorded information of embodied on computer readable and device, playback, has write down the embodied on computer readable of information with such recording method.
Background technology
In recent years, as the information recording carrier of embodied on computer readable, CD-R dish, CD-RW dish, DVD+R dish, DVD+RW dish etc. are constantly popularized.In general, the information that writes down in such information recording carrier is carried out playback time, detect the clock mark be recorded in the information recording carrier and sync mark and obtain clock signal and synchronizing signal.
In the past,,, also correctly carried out the byteization of bit stream, stoped the generation (for example, opening flat 7-320419 communique) of too much data error with reference to (Japan) spy even the bit offset that the defective on the bit stream causes takes place about Clock Extraction and synchronizing signal.
In addition, the necessity of the clock mark in relevant many-valued when record, have the multi-value data portion that has been used for writing down multilevel information, write down the bit portion of the synchronization bit that is used to generate the demodulation clock that can obtain timing that the multilevel information that is recorded in this multi-value data portion is reset in advance, by generate described demodulation clock corresponding to the electric signal of described synchronization bit, detect signal level (for example, opening flat 4-219626 communique (No. 2914732 communique of patent)) with the corresponding electric signal of described multilevel information synchronously with this demodulation clock with reference to (Japan) spy.
Under the situation with many-valued level recording information in recording medium, be difficult to from its replay signal, extract clock, be recorded in recording medium so will be used to extract the special marker of clock.At playback time, the interval of clock mark changes because of the rotation of recording medium is irregular, so need have the mark of the window width bigger than this change part.In addition, need not produce the synchronous mark of mistake among this window width, the sync mark that is used to restore because of the bit offset of generation such as defective also is the synchronizing signal of necessity.The change of sync mark is bigger than clock mark, so need bigger window.
When in fact producing the signal shortcoming that bit offset causes, the phase place of clock greatly is offset, and the reliability of signal is greatly lost.Therefore, in order to make the phase place unanimity of clock,, phase place is overlapped lentamente with a plurality of clock marks in mode in the past.Therefore, even till obtaining phase-locking after the signal restoring, the possibility that produces mistake in replay data is arranged all.
In addition, under the situation of two value records, can from replay signal, extract clock, so even replay signal vacancy temporarily also can automatically be introduced clock when having restored replay signal.But, under the situation of many-valued record, as mentioned above, have the elongated problem of time till introducing phase place.
Summary of the invention
Overall purpose of the present invention is, a kind of information recording and reproduction technology is provided, and helps to solve and improve the problems referred to above.
Purpose more specifically of the present invention is, a kind of information recording and reproduction technology is provided, and can carry out bit offset detection and clock detection simultaneously and reduce redundance with a mark.
Other purposes of the present invention are, a kind of information recording and reproduction technology is provided, and can promptly restore the caused clock phase skew of the mistake that causes because of the signal shortcoming.
To achieve these goals, according to an aspect of the present invention, a kind of information recording method is provided, recorded information and the sync mark that is used to extract the clock mark of clock and detects bit offset when resetting this information in recording medium are so that the part of sync mark is identical with the pattern of clock mark.
According to above-mentioned information recording method, form with clock mark identical shapedly by a part with sync mark, can carry out that bit offset detects and clock detection with a mark simultaneously.
According to a further aspect in the invention, a kind of deck mechanism for magnetic recording/reproducing apparatus is provided, from having write down information and being used for extracting the clock mark of clock and detecting the sync mark of bit offset so that the part of the sync mark recording medium identical when this information of playback with the pattern of clock mark, come playback information according to sync mark and clock mark, and detect bit offset with sync mark, also carry out the synchronous detection of clock simultaneously.
According to above-mentioned deck mechanism for magnetic recording/reproducing apparatus, detect and clock detection by carry out bit offset simultaneously with a mark, thereby can reduce redundance.
In above-mentioned information recording method, preferably so that record is uniformly-spaced carried out in the position of the position of the clock mark in the sync mark and other clock marks.In addition, in above-mentioned information recording method, also can come recorded information, and clock mark be formed the combination of the 2nd level of the 1st level of replay signal maximum and replay signal minimum with multilevel information.In addition, in above-mentioned information recording method, preferred so that the beginning of clock mark and last continuous plural same level are carried out record.And, in above-mentioned information recording method, also can correct mistake with the error recovery sign indicating number of the 1st kind and the 2nd kind, recorded information on the error recovery direction of the 1st error recovery sign indicating number, and sync mark is recorded in the 2nd error recovery sign indicating number starts corresponding part.
According to a further aspect in the invention, provide a kind of information record carrier, according to above-mentioned information recording method recorded information in recording medium, it comprises clock mark and sync mark is recorded in device in the information.
According to above-mentioned information record carrier, form with clock mark identical shapedly by a part with sync mark, can carry out that bit offset detects and clock detection with a mark simultaneously.
And, a kind of information reproducing device is provided, the recording medium that has carried out record according to above-mentioned information recording method is reset, it is included in clock mark and sync mark is recorded under the situation that the recording medium in the information resets, detect bit offset with sync mark, also carry out the device of the synchronous detection of clock simultaneously.
According to above-mentioned information reproducing device, detect and clock detection by carry out bit offset simultaneously with a mark, thereby can reduce redundance.
In above-mentioned information reproducing device, also can comprise the device of the sync detection window of detection window that bit offset is set respectively and clock.
In addition, according to a further aspect in the invention, provide a kind of recording medium of embodied on computer readable, write down and have the data that write down the structure that clock mark and sync mark constitute by above-mentioned information recording method.
According to the recording medium that the aforementioned calculation machine can read, form with clock mark identical shapedly by a part with sync mark, can carry out that bit offset detects and clock detection with a mark simultaneously.
In addition, according to a further aspect in the invention, a kind of information recording method is provided, for recording medium, come recorded information with many-valued level, to recording medium recording information the time, be used to extract when being recorded in from recording medium playback information clock clock mark, be used to detect the sync mark of bit offset and phase locked synchronous introducing mark is introduced in the position that is used for after this sync mark.
According to above-mentioned information recording method, record is used to introduce phase locked synchronous introducing mark after sync mark.Thus, even produced at playback time under the situation of clock phase skew, also can this phase deviation be restored as soon as possible by utilizing synchronous introducing mark.Therefore, the mistake that signal shortcoming etc. causes can be suppressed to Min..
In above-mentioned information recording method, preferably recording clock mark and sync mark is so that the part of sync mark is identical with the pattern of clock mark.In this case, can carry out bit offset simultaneously with a mark and detect and clock detection, can reduce redundance.Therefore, after appended synchronization is introduced mark, be favourable.
In addition, in above-mentioned information recording method, also can come record with introducing the combination pattern of mark synchronously as the 2nd level of the 1st level of replay signal maximum and replay signal minimum.In this case, except input easily, also be not vulnerable to the influence of noise etc., can realize introducing synchronously reliably.
In above-mentioned information recording method, the combination pattern that also can introduce mark synchronously is at the pattern that has a plurality of other the 2nd level or the 1st level between the 1st level or between the 2nd level.In addition, preferably introduce the quantity that a plurality of in the combination pattern of mark are meant that the amplitude that do not cause with intersymbol interference descends synchronously.In this case, can prevent that the amplitude that intersymbol interference causes from descending, and can realize introducing synchronously reliably.
In addition, in above-mentioned information recording method, preferably correct mistake with the 1st error recovery sign indicating number and the 2nd error recovery sign indicating number, recorded information on the error recovery direction of the 1st error recovery sign indicating number is with sync mark and the synchronous part of introducing label record in the beginning of corresponding the 1st error recovery sign indicating number.In this case, by at the beginning part configuration synchronization mark of the transverse direction of error recovery and introduce mark synchronously, can not need to set up Q-character.
In addition, according to a further aspect in the invention, a kind of information record carrier is provided, come recorded information for recording medium with many-valued level, it comprises the label record device, to recording medium recording information the time, be recorded in from recording medium to information carry out playback time be used to extract clock clock mark, be used to detect the sync mark of bit offset and phase locked synchronous introducing mark is introduced in the position that is used for after this sync mark.
According to above-mentioned information record carrier, be used to introduce phase locked synchronous introducing mark owing to after sync mark, having write down by the label record device, even so produced at playback time under the situation of clock phase skew, by utilizing synchronous introducing mark, this phase deviation can be restored as soon as possible, the mistake that signal shortcoming etc. is caused is a Min..
In addition, according to a further aspect in the invention, a kind of recording medium is provided, the information that serves as a mark, be recorded in to the information of record carry out playback time be used to extract clock clock mark, be used to detect the sync mark of bit offset and phase locked synchronous introducing mark is introduced in the position that is used for after this sync mark.
According to foregoing invention, because record is used to introduce phase locked synchronous introducing mark after sync mark, even so produced at playback time under the situation of clock phase skew, by utilizing synchronous introducing mark, this phase deviation can be restored as soon as possible, the mistake that signal shortcoming etc. is caused is a Min..In addition, can improve reliability of recording data.
According to a further aspect in the invention, provide a kind of deck mechanism for magnetic recording/reproducing apparatus,, detect bit offset, carry out the synchronous detection of clock simultaneously, make phase matching based on synchronous introducing mark based on sync mark in that aforementioned recording medium is carried out playback time.
According to above-mentioned deck mechanism for magnetic recording/reproducing apparatus, even the playback time at recording medium has produced under the situation of clock phase skew, by utilizing the synchronous introducing mark that sync mark after, writes down, this phase deviation can be restored as early as possible, the mistake that signal shortcoming etc. is caused is a Min..
In addition, according to a further aspect in the invention, provide a kind of information reproducing device, with aforementioned recording medium as playback object, it comprises based on sync mark detects bit offset, carries out the synchronous detection of clock simultaneously, makes the label information treating apparatus of phase matching based on synchronous introducing mark.
According to above-mentioned information reproducing device, even the playback time at recording medium has produced under the situation of clock phase skew, by utilizing the synchronous introducing mark that after sync mark, writes down by the label information treating apparatus, this phase deviation can be restored as early as possible, the mistake that signal shortcoming etc. is caused is a Min..
In above-mentioned information reproducing device, also can comprise the PLL circuit (phase-locked loop circuit) that is used to introduce synchronously processing, the label information treating apparatus makes the loop gain of PLL circuit in the synchronous introducing mark part surpass the gain of other parts.In this case, owing to the loop gain that improves the PLL circuit with the part of synchronous introducing mark, return so can dephase as early as possible.
In addition, in above-mentioned information reproducing device, also can comprise the PLL circuit (phase-locked loop circuit) that is used to introduce synchronously processing, the label information treating apparatus makes the loop gain of PLL circuit in the synchronous introducing mark part under the bit offset testing conditions surpass other parts.In this case, owing to only detecting under the situation of bit offset, assign to improve the loop gain of PLL circuit, return so can dephase as early as possible with synchronous introducing labeling section.
Other purposes of the present invention, feature and advantage by reference accompanying drawing and the following detailed explanation of reading, will be clearer and more definite.
Description of drawings
Fig. 1 (a)～(c) is the oscillogram of the playback waveform of expression one routine many-valued record.
Fig. 2 is the block scheme of structure of the optical disc apparatus of expression the present invention the 1st embodiment.
Fig. 3 is the figure of information that expression is write down in the CD general format of arranging.
Fig. 4 (a)～(c) is the figure of a routine clock mark of expression the present invention the 1st embodiment.
Fig. 5 (a)～(c) is the figure of a routine sync mark of expression the present invention the 1st embodiment.
Fig. 6 is the figure that is illustrated in the form when having comprised clock mark and sync mark in the information that writes down in the CD.
Fig. 7 is the figure that is illustrated in the form when having comprised clock mark and sync mark in the information that writes down in the CD.
Fig. 8 is the synoptic diagram that is used to illustrate common error recovery.
Fig. 9 is illustrated in the figure of correspondence as the example of configuration synchronization mark in the beginning part of the 2nd error recovery sign indicating number of the transverse direction of data.
Figure 10 is the block scheme of the structure of the information playback in the expression optical disc apparatus shown in Figure 2.
Figure 11 (a)～(d) is the output timing diagram of clock mark window and sync mark window.
Figure 12 is the figure of the information format that writes down in the CD of expression embodiment of the present invention 2.
Figure 13 (a)～(c) is the figure that expression one example is introduced mark synchronously.
Figure 14 is the synoptic diagram that is used to illustrate the error recovery of the present invention's the 2nd embodiment.
Embodiment
(the 1st embodiment)
Below, referring to figs. 1 through Figure 11 the 1st embodiment of the present invention is described.
Fig. 1 is the oscillogram of the playback waveform of expression one routine many-valued record.The ideal value of the playback waveform of (a) expression 8 values among Fig. 1, (b) among Fig. 1 represents the waveform of the playback clock that this is desirable.The voltage of playback waveform not only changes in the rising edge rectangle rolling land of playback clock, and reaches stable and can carry out the level judgement at the negative edge of clock.The actual playback waveform of (c) expression among Fig. 1.
Fig. 2 is the block scheme of structure of the optical disc apparatus of expression the present invention the 1st embodiment.The part relevant with the present invention shown in Fig. 2 is illustrated in MIN structure required in the enforcement of the present invention.
In the optical disc apparatus shown in Figure 2 (CD drive), when interface controller 8 was accepted instruction from external unit (for example personal computer), 8 pairs of controllers of interface controller, 7 notices had been accepted instruction.
In CD 10 during recorded information, the information (being recorded in the data the CD 10) that transmits from external unit, is stored in the memory buffer 5 via digital circuit 6 by interface controller 8 temporarily.
When being recorded in CD 10 in many-valued level mode information, control the electric current that the semiconductor laser light source LD on the pick-up (PU) 2 (owing to the known diagram of omitting) is supplied with by mimic channel 3, make semiconductor laser light source LD luminous simultaneously.
In addition, in pick-up 2, accept to have been reflected reflected light by light receiving element PD (owing to the known diagram of omitting) from the ejaculation light gained of LD by CD 10, and handle by mimic channel 3, generate focusing error signal and tracking error signal and be input to servo circuit 4, control the position of pick-up 2 and the position of lens (owing to the known diagram of omitting) by servo circuit 4.
The information that is recorded in the CD 10 is carried out playback time, and the output data of pick-up 2 simulated circuit 3 and quantizes, and carries out Clock Extraction with PLL etc.Data are carried out synchronous detection, demodulation, error recovery etc. by digital circuit 6, are stored in the memory buffer 5.Then, the data that are stored in the memory buffer 5 are sent to external unit by interface controller 8.
Fig. 3 is the figure of general format of the arrangement of the information that writes down in the CD of expression.In the information that writes down in CD, clock mark and data are alternately disposed.
Under the situation of recording multi-value data, different in CD with two-value data, owing to can not correctly extract the edge part of replay signal, so can not extract clock from edge part.Therefore, except the information portion of record data, record is called as the signalment of clock mark, and extracts clock from clock mark.
The length of clock mark (data length) is set, so that the clock variation that the off-centre of CD etc. produce is in the allowable value of system.In clock mark, adopt the pattern that does not have from the influence of the intersymbol interference before and after it.In addition, even need the shift in position of clock mark, do not produce mistake synchronously yet.
Fig. 4 is the figure of a routine clock mark of expression present embodiment.Clock mark shown in Figure 4 shown in (a) among Fig. 4, for example when coming recorded information with 8 values, is that the big side of reflection light quantity is 0, light quantity is 7 o'clock serial data " 00700 " after a little while.The waveform of the replay signal of playback time is carried out in (b) expression among Fig. 4 to the serial data shown in (a) among Fig. 4.And (c) among Fig. 4 expression is carried out differential and the differentiated waveform obtained to replay signal.Can intersect according to 0 of differentiated waveform and carry out the detection of sync bit.Generate clock by the phase comparator that detected sync bit is input to the PLL circuit.
Fig. 5 is the figure of a routine sync mark of expression the present invention the 1st embodiment.
Shown in (a) among Fig. 5, sync mark and above-mentioned clock mark are same, for example with 8 value record information the time, are equivalent to the big side of reflection light quantity and are 0, light quantity is 7 o'clock serial data " 000070000 " after a little while.The waveform of the replay signal of playback time is carried out in (b) expression among Fig. 5 to the data ordering shown in (a) among Fig. 5.In sync mark, the pattern of the part that with dashed lines surrounds among Fig. 5 is identical with above-mentioned clock mark.
In (c) in Fig. 5, expression is to the differentiated waveform of replay signal differential gained.Can intersect with 0 of differentiated waveform and carry out the detection of sync bit.With above-mentioned clock mark relatively, the long reason of sync mark is, the change that is used to restore the bit offset (bit slip) that produces because of defective etc. is bigger than clock mark, so need bigger window.
Fig. 6 is the figure that is illustrated in the form when comprising clock mark and sync mark in the information that writes down in the CD.At example shown in Figure 6, clock mark is by uniformly-spaced configuration, configuration data and sync mark between it.
Below, the information recording processing of carrying out in the above-mentioned optical disc apparatus is described.The information recording processing is undertaken by the function of the each several part of optical disc apparatus under the control of controller 7, but in the following description, the processing of carrying out as controller 7 illustrates.
In present embodiment,, realize the shared of clock mark and sync mark with the pattern of clock mark shown in Figure 4 and sync mark shown in Figure 5.That is, form the pattern identical, can make sync mark have the function of clock mark with clock mark by a part with sync mark.Therefore, the redundance of data can be reduced, recordable data volume increase in the CD can be made.
In addition, controller 7 is controlled when carrying out above-mentioned recording processing, so that the position of the position of the clock mark in the sync mark and other clock marks uniformly-spaced.
Fig. 7 is the figure of the form when comprising clock mark and sync mark in the information that writes down in the expression CD.As shown in Figure 7, by being uniformly-spaced to dispose, can carry out the generation of clock simply with the part of the clock mark in the sync mark and the pass, position of other clock marks.
And controller 7 is by above-mentioned recording processing during with multilevel information mode recorded information, and the combination that clock mark is made as the 2nd level of the 1st level of replay signal maximum and replay signal minimum comes record.
As shown in Figure 4, utilize the part of " 070 " of clock mark, can be with position, the position of the level " 7 " of amplitude maximum as clock.
In addition, controller 7 grades are when carrying out above-mentioned recording processing, so that the beginning of clock mark and carry out record for continuous two above same level at last.
As shown in Figure 4, change for fear of the intersymbol interference of replay signal because of two consecutive values of the part of " 070 " of clock mark, establish reset (that is, beginning and establish reset respectively at last) in the both sides of " 070 ", making serial data is " 00700 ".Like this, by making same level continuous, can avoid replay signal to change because of intersymbol interference in front and back.
When replay signal is interrupted because of defective etc., can not carry out the detection of clock, clock is state voluntarily.Produce bit offset, the later data of can not resetting when defective is long.
Therefore, restore from bit offset in order to use sync mark, controller 7 is when above-mentioned recording processing, error recovery sign indicating number with the 1st kind and the 2nd kind is corrected mistake, recorded information on the error recovery direction of the 1st error recovery sign indicating number, and sync mark is recorded in the part that is positioned at the 2nd error recovery sign indicating number beginning.
Fig. 8 is the synoptic diagram that is used to illustrate common error recovery.Fig. 9 is the synoptic diagram that is used to illustrate the error recovery of the present invention's the 1st embodiment.
As shown in Figure 8, at additional the 1st error recovery sign indicating number of transverse direction (right side of ' data ' among the figure), at additional the 2nd error recovery sign indicating number of longitudinal direction (downside of ' data ' among the figure), the upper left corner from figure is to transverse direction (right among the figure) record data (information) successively.
Here, recur mistake on the transverse direction when producing defective etc., but come correct errors with the 2nd error recovery sign indicating number of longitudinal direction.In this error recovery, use the technology of so-called erasure correction.Proofread and correct with Q-character (flag) this moment, but Q-character can not be proofreaied and correct for a long time.Therefore, as shown in Figure 9, at part (the beginning part) the configuration synchronization mark of the beginning of the 2nd error recovery sign indicating number of the transverse direction that is positioned at data.Like this, by the beginning part configuration synchronization mark, can invalidly not formulate Q-character at the transverse direction of error recovery.
Below, the information playback processing of being undertaken by optical disc apparatus is described.Information playback is handled under the control of controller 7 by the function of the each several part of optical disc apparatus and is undertaken, but in the following description, the processing of carrying out as controller 7 illustrates.
Figure 10 is the block scheme of the structure of resetting for information about in the expression optical disc apparatus shown in Figure 2.
As shown in figure 10, replay signal (playback waveform) is imported into clock mark test section 22 and sync mark test section 21.But in order to become mistake in preventing during data synchronously, the window that counter/sequencer 24 forms is separately supplied with clock mark test section 22 and sync mark test section 21.That is, generate the sync mark window by counter and supply to sync mark test section 21, generate the clock mark window by sequencer and supply to clock mark test section 22.
After clock mark test section 22 carried out the detection of clock, the clock that phase-locked loop circuit (PLL) 23 forms unit of cells was gone forward side by side line phase relatively.And after sync mark test section 21 carries out synchronous detection, the value of counter is set at designated value.And the clock of the unit of cells that PLL23 forms is output to counter.
Because clock mark is " 00700 ", so might be what causes the possibility that mistake is synchronous because of the both sides is adjacent.Worst-case value is that the front side is configured the situation that " 007 ", rear side are configured " 700 ".
Figure 11 is the sequential chart of the output of clock mark window and sync mark window.
Shown in (c) among Figure 11, be the clock mark window that supplies a Unit 3 before and after the center is provided with by " 7 " with clock mark, can prevent that mistake is synchronously.Equally, shown in (d) among Figure 11, for sync mark, the sync mark window that 5 unit are set is just passable.Thus, by sync mark and clock mark are provided with window respectively, can prevent that mistake synchronously.
Below, the CD that writes down by above-mentioned information recording method is described.
In CD 10, write down information and had clock mark and the consitutional data of sync mark by above-mentioned information recording method.By record data as mentioned above, the reliability of data improves.Particularly can from defective, restore.Like this, be identical pattern by a part that makes sync mark with clock mark, make sync mark have the function of clock mark and reduce redundance, the high recording medium of reliability of data can be provided.
At above-mentioned the 1st embodiment, as recording medium, CD has been described, but information recording method of the present invention, deck mechanism for magnetic recording/reproducing apparatus, information record carrier, information reproducing device are not subject to the recording mode of recording medium.That is,, can adopt the present invention equally, obtain the effect identical with above-mentioned effect for the recording medium of Magnetooptic recording medium, Worm type, rewritable recording medium.
(the 2nd embodiment)
Below, with reference to Figure 12 to Figure 14 the 2nd embodiment of the present invention is described.Have, the structure of the optical disc apparatus of present embodiment is identical with the optical disc apparatus of the 1st embodiment shown in Figure 2, so omit its explanation again.
Figure 12 represents the form of the information of record in the CD 10 of the present invention's the 2nd embodiment.At the form of present embodiment shown in Figure 12, be considered to the inconsistent synchronously of phase place when detecting bit offset, so the position after sync mark, configuration is used to introduce phase locked synchronous introducing mark.Example shown in Fig. 12 is represented as the example application to form shown in Figure 7, but can be used too for the form example of Fig. 6.Especially be applied to the form example of Fig. 7, can carry out bit offset simultaneously with a mark and detect and clock detection, can reduce redundance, so as present embodiment, after having added synchronous introducing mark, be favourable.
Figure 13 is the figure that expression one example is introduced mark synchronously.With regard to introducing mark synchronously, require signal to detect easily, the anti-noise sound intensity.Therefore, in present embodiment, in the scope that obtains peak swing with many-valued level, for example shown in (a) among Figure 13, with 8 the value many-valued recorded information the time, be that the big side of reflection light quantity is that the 1st level " 0 ", light quantity are the 2nd level " 7 " after a little while, make up the such pattern example of serial data " 070070070... " of these the 1st, the 2nd level gained.(b) among Figure 13 represents the waveform example of the replay signal of its playback time, the differentiated waveform when (c) among Figure 13 represents this replay signal differential.According to this differentiated waveform, introduce synchronously successively with its 0 intersection as can be known.
In addition, introduce mark synchronously because of increasing the relatively number of times of phase place, mostly comparable part (level among Figure 13 is 7 part) is favourable.But when carrying out high density recording, replay signal diminishes because of intersymbol interference, is difficult to detect.Therefore, this combination pattern of introducing mark synchronously is at the pattern that has a plurality of other the 2nd level " 7 " or the 1st level " 0 " between the 1st level " 0 " or between the 2nd level " 7 ", and its number is not for the quantity that reduces because of the intersymbol interference amplitude.At the example shown in Figure 13, each combination two the 1st level " 0 " between the 2nd level " 7 ".
, as illustrating in above-mentioned the 1st embodiment, when replay signal is interrupted because of defective etc., can not carry out the detection of clock, clock is state voluntarily.When this defective is long, will cause bit offset.If cause bit offset, the later data of then can not resetting.
Therefore, restore from bit offset with sync mark, so as the explanation of carrying out with reference to Fig. 8, when recording processing, come correct errors with the 1st error recovery sign indicating number and two kinds of codes of the 2nd error recovery sign indicating number, and on the error recovery direction of the 1st error recovery sign indicating number recorded information, sync mark is recorded in the beginning part that is arranged in the 2nd error recovery sign indicating number.
Figure 14 is the synoptic diagram that is used to illustrate the error recovery of present embodiment.In present embodiment, as shown in figure 14, at the part configuration synchronization mark of the beginning of the 2nd error recovery sign indicating number of the transverse direction that is arranged in data, the position configuration after it is used to introduce phase locked synchronous introducing mark.
By optical disc apparatus shown in Figure 2, can and introduce mark synchronously and in CD or from CD 10, reset clock mark, sync mark according to Figure 12, format record shown in Figure 14.
Promptly, when describing for the information recording processing in this optical disc apparatus, controller 7 as with clock mark shown in Figure 4, sync mark shown in Figure 5 and synchronous introducing mark shown in Figure 13 according to Figure 12 and format record shown in Figure 14 in information the label record device and work.Thus,, utilize the function of this label record device for CD 10, recorded information, be used to extract when resetting this information clock clock mark, be used to detect bit offset sync mark, be used to introduce phase locked synchronous introducing mark.Introducing mark synchronously is recorded with position after being positioned at sync mark.In this case, recording processing itself is same with common data recording situation, and the record that carries out each level is just passable.
Handle for resetting, under structure shown in Figure 10, carry out.As shown in figure 10, replay signal (playback waveform) is input to clock mark test section 22 and sync mark test section 21.But,, in counter/sequencer 24, form and supply with window separately for synchronous in preventing during data for mistake.That is, generate the sync mark window and supply with sync mark test section 21, generate the clock mark window and supply with clock mark test section 22 by sequencer by counter portion.
After clock mark test section 22 carried out the detection of clock, the clock that PLL circuit 23 forms unit of cells was gone forward side by side line phase relatively.And after sync mark test section 21 carries out synchronous detection, the value of counter is set at designated value.And the clock of the unit of cells that PLL circuit 23 forms is output to counter.At this moment,, also the window of clock mark test section 22 is opened, carried out the phase bit comparison by PLL circuit 23 even introduce the part of mark synchronously.And, that this window can only occur when sync mark test section 22 detects bit offset, adjust under the situation that signal produced bit offset with counter and to export, also can export all the time.
In addition, in order to accelerate the synchronous introducing of PLL circuit 23,,, can accelerate synchronously by improving the loop gain of PLL circuit 23 in the synchronous part of introducing mark.In addition, with this combination, also can only improve loop gain in the part that detects the synchronous introducing of usefulness mark under the situation of bit offset.
The invention is not restricted to above-mentioned concrete disclosed embodiment, can produce various variation within the scope of the invention and improve example.
Claims (11)
1. an information recording method for recording medium, comes recorded information with many-valued level, it is characterized in that:
To the described information of described recording medium recording the time, be recorded in from described recording medium the clock mark that is used to extract clock when resetting described information, be used to detect the sync mark of bit offset and phase locked synchronous introducing mark is introduced in the position that is used for after this sync mark.
2. information recording method as claimed in claim 1 is characterized in that, writes down described clock mark and described sync mark, so that the part of described sync mark is identical with the pattern of described clock mark.
3. information recording method as claimed in claim 1 is characterized in that, described synchronous introducing mark is come record as the combination pattern of the 2nd level of the 1st level of replay signal maximum and replay signal minimum.
4. information recording method as claimed in claim 3 is characterized in that, the combination pattern of described synchronous introducing mark is at the pattern that has a plurality of other described the 2nd level or described the 1st level between described the 1st level or between described the 2nd level.
5. information recording method as claimed in claim 4 is characterized in that, a plurality of in the combination pattern of described synchronous introducing mark are meant the quantity that the amplitude that do not cause with intersymbol interference descends.
6. an information record carrier comes recorded information for recording medium with many-valued level, it is characterized in that:
Comprise the label record device, to the described information of described recording medium recording the time, be recorded in from described recording medium to described information carry out playback time be used to extract clock clock mark, be used to detect the sync mark of bit offset and phase locked synchronous introducing mark is introduced in the position that is used for after this sync mark.
7. recording medium, it is characterized in that, the serve as a mark structure of message part, be included in to the information of record carry out playback time be used to extract clock the clock mark part, be used to detect the sync mark part of bit offset and phase locked synchronous introducing mark part is introduced in the position that is used for after this sync mark.
8. deck mechanism for magnetic recording/reproducing apparatus, it is characterized in that, in the information of serving as a mark, to write down the information of record is carried out playback time be used to extract clock clock mark, be used to detect the sync mark of bit offset and be used for position after this sync mark introduce the recording medium of phase locked synchronous introducing mark and carry out playback time
Detect bit offset based on described sync mark, carry out the synchronous detection of clock simultaneously, make phase matching based on synchronous introducing mark.
9. information reproducing device, with the information of serving as a mark, to write down the information of record is carried out playback time be used to extract clock clock mark, be used to detect the sync mark of bit offset and the recording medium of phase locked synchronous introducing mark is introduced as playback object in the position that is used for after this sync mark, it is characterized in that
Comprise based on described sync mark and detect bit offset, carry out the synchronous detection of clock simultaneously, make the label information treating apparatus of phase matching based on synchronous introducing mark.
10. information reproducing device as claimed in claim 9 is characterized in that, comprises the PLL circuit that is used to introduce synchronously processing,
Described label information treating apparatus makes the loop gain of PLL circuit described in the described synchronous introducing mark part surpass the gain of other parts.
11. information reproducing device as claimed in claim 9 is characterized in that, comprises the PLL circuit that is used to introduce synchronously processing,
Described label information treating apparatus makes the loop gain of PLL circuit described in the described synchronous introducing mark part under the described bit offset testing conditions surpass other parts.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP125947/03 | 2003-04-30 | ||
| JP2003125947A JP4499372B2 (en) | 2003-04-30 | 2003-04-30 | Information recording method, information reproducing method, information recording apparatus, information reproducing apparatus, and computer-readable recording medium |
| JP310162/03 | 2003-09-02 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800117236A Division CN100363988C (en) | 2003-04-30 | 2004-03-15 | Information recording method and apparatus, information reproducing method and apparatus, and recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101046985A true CN101046985A (en) | 2007-10-03 |
| CN100483515C CN100483515C (en) | 2009-04-29 |
Family
ID=33503054
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101025542A Expired - Fee Related CN100483515C (en) | 2003-04-30 | 2004-03-15 | Information recording method and apparatus, information reproducing method and apparatus, and recording medium |
| CNB2004800117236A Expired - Fee Related CN100363988C (en) | 2003-04-30 | 2004-03-15 | Information recording method and apparatus, information reproducing method and apparatus, and recording medium |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800117236A Expired - Fee Related CN100363988C (en) | 2003-04-30 | 2004-03-15 | Information recording method and apparatus, information reproducing method and apparatus, and recording medium |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4499372B2 (en) |
| CN (2) | CN100483515C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110205653A1 (en) * | 2010-02-24 | 2011-08-25 | Lsi Corporation | Systems and Methods for Data Recovery |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4845575A (en) * | 1987-10-06 | 1989-07-04 | Standard Microsystems Corporation | Analog floppy disk data separator |
| JPH0210574A (en) * | 1988-06-28 | 1990-01-16 | Matsushita Electric Ind Co Ltd | Demodulating circuit |
| US5428648A (en) * | 1992-09-18 | 1995-06-27 | Sony Corporation | Digital PLL circuit having signal edge position measurement |
| JPH10255409A (en) * | 1997-03-13 | 1998-09-25 | Sony Corp | Data reproducing device, data transfer method, data transferring device, and data recording medium |
| JPH1116216A (en) * | 1997-06-19 | 1999-01-22 | Sony Corp | Optical disk and optical disk device |
| JP3519309B2 (en) * | 1999-04-28 | 2004-04-12 | シャープ株式会社 | Optical disc, optical reproducing device and optical recording device |
-
2003
- 2003-04-30 JP JP2003125947A patent/JP4499372B2/en not_active Expired - Fee Related
-
2004
- 2004-03-15 CN CNB2007101025542A patent/CN100483515C/en not_active Expired - Fee Related
- 2004-03-15 CN CNB2004800117236A patent/CN100363988C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2004334934A (en) | 2004-11-25 |
| CN1781144A (en) | 2006-05-31 |
| CN100363988C (en) | 2008-01-23 |
| JP4499372B2 (en) | 2010-07-07 |
| CN100483515C (en) | 2009-04-29 |
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