CN1897122A - Method for determining first and final impulse move tf/tl for data recording medium - Google Patents
Method for determining first and final impulse move tf/tl for data recording medium Download PDFInfo
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- CN1897122A CN1897122A CN 200610100051 CN200610100051A CN1897122A CN 1897122 A CN1897122 A CN 1897122A CN 200610100051 CN200610100051 CN 200610100051 CN 200610100051 A CN200610100051 A CN 200610100051A CN 1897122 A CN1897122 A CN 1897122A
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Abstract
The invention relates to a method for determining first and final impulse move tf/tl for a data recording medium. The data recording medium having a plurality of concentric or spiral tracks for recording information represented as marks and spaces between the marks. This method comprises steps of: a)generating a pattern siganl containing a1) measurement signal and a2) reference signal; b) storing the pattern signal; c) generating one or more drive pulses correspongding to the pattern signal; d)forming spaces and marks on the data recording medium by generating and emitting thereto an optical beam modulated according to the plurality of drive pulses and reproducing the marks and spaces recorded to the data recording medium; f) comparing and obtaining a difference between reproduced reproduction signal and the stored pattern signal; and g) obtaining from this difference the first and final impulse move tf/tl for application to an original sigal containing a sequence of space parts of length QT and mark parts of PT.
Description
The application's case is that application number is the dividing an application for female case of " optical data recording method and the equipment that the data recording medium is write down and duplicates " that 200410007852.X, the applying date be on March 3rd, 2004, denomination of invention.
Technical field
The present invention relates to a kind ofly obtain first pulse for data carrier and move the method that TF and final pulse move TL.
Background technology
Owing to be used for optical data, especially digital data record can be utilized the medium memory lot of data of limited entity size with the equipment that is replicated on the data carrier, thereby has become the problem of numerous research and development.
Phase change disc is a kind of recordable optical data recording medium.For data are recorded on the phase change disc, the light beam of semiconductor laser focuses on the CD of rotation, thereby to its heating and fusion, promptly changes the phase of recording film.The speed of the temperature of recording film and recording film cooling for example changes according to the intensity of light beam.
When the intensity of light beam is very high, recording film will cool off rapidly from the condition of high temperature, and recording film will become amorphous phase.When light beam is more weak relatively, recording film will be therefrom high temperature condition cool off gradually, and therefore recording film by crystallization.Amorphous area general designation to the recording film that forms is made " mark "; Crystalline portion between continuous mark general designation is done " space ".These marks and space are used to the recording binary data, and promptly 0 and 1.
It should be appreciated that the laser power when beam intensity is very high is known as " peak power ", and the laser power of beam intensity when very low is known as " substrate bias power ".
When data are duplicated, a low power optical beam, promptly the light beam of its undercapacity to cause undergoing phase transition on the recording film by the directive CD, and then will detect the light that is returned by CD reflection.Usually the reflection coefficient of amorphous mark is very low, and the reflection coefficient in crystalline phase space is very high.Therefore can draw a reproducing signals according to the difference of detected luminance by mark and space reflection.
Mark position record (or PPM record), wherein utilize the position of mark that information is carried out record with measured length, with marker edge record (or PWM record), wherein utilize the length in space between the length of mark and mark that information is carried out record, be two kinds data are recorded in method on the phase change disc.Usually in these two kinds of methods, the data recording density of marker edge record is higher.
Usually the mark of the method record of marker edge record also is longer than the calibration note length when adopting the mark position record.When a peak power light beam directive phase change disc,, assemble to make in the heat on the recording film and generate mark on the recording film, the shape of described some teardrop of mark, its latter half broad diametrically so that when a long mark write down.For example because the increase of the decay of signal linearity in tracer signal, shake when duplicating, during by direct regenerative recording overwrite flags left mark remaining and when duplicating crosstalking etc. between session all can cause signal quality obviously to reduce.
Short mark and the space of record is a kind of measure that increases recording density.But short space length will cause heat to disturb.Behind the mark that for example is recorded along last heat can by conduction by the back the space and impel the rising of the temperature that the mark of back begins to locate.Heat on the mark starting end that is recorded also can by conduction by the front the space and influence the cooling procedure of the mark end of front.The problem of following the heat interference in habitual recording method to occur is that the position on mark edge will change, and causes occurring in the reproduction process higher error rate.
For addressing the above problem, patented claim 7-129959 (the U.S. Patent number US5 of Japanese unexamined, 490,126 and US 5,636,194) propose a kind of method to label record, wherein will adopt the tracer signal that conforms to a mark of mark edge recording mode to be divided into beginning, centre and latter end, each begins all have certain pulse width with latter end and center section includes the fixed cycle pulse.Then adopt this tracer signal promptly the output of scale-of-two laser instrument to be changed.
Adopt the method, the width of the center section of a long mark is constant substantially and can broadening, this be because adopt the some cycles pulse current to laser instrument output drive and described fixed cycle pulse current produce form the required lowest power of mark so.Owing to adopt in the front-end and back-end of mark and decide pulse width and to send laser beam, thus also can be when direct regenerative recording to the forward position of mark and after the increase of shake on edge suppress.
But also can detect mark or before mark and the space behind the mark be long or short, and change record mark according to the length in the space of mark and front and back and begin position with latter end.Take this measure can be to when record because heat disturbs the peakdeviation that causes to compensate, wherein the heat on the end of record mark is conducted the heating process that space by the back and the mark of influence in the back begin to locate, and the record mark of the back heat that begins to locate again can be oppositely by the front the space and influence the cooling procedure at end place of the mark of front.
But Japanese unexamined patent application 7-129959 does not propose the instruction about the optimum position method of the beginning of determining mark and latter end, and proposes relevantly to change and adjust the concrete structure of position on beginning and end edge and the instruction of principle yet.
If can not propose a kind of like this method and structure of the best, realize that then the reliability of best titime will be very low.Even realize best record in addition, to think that also a large amount of time is paid in the best position of search and very big circuit overhead is a cost.
So invented a kind of as realizing being used for of high density data storage measure according to having data to be recorded to change the beginning of mark and finishing method along the position.But follow the problem of this invention to be, because aforesaid heat disturbs the mark that is recorded along moving.This also depends on the structure of CD and the composition of recording film greatly along mobile phenomenon, even and in case have in above-mentioned two kinds of factors and a kind ofly slightly change, just can not realize best record.
Summary of the invention
The objective of the invention is to propose a kind ofly obtain first pulse for data carrier and move the method that TF and final pulse move TL.
The technical scheme that realizes above-mentioned purpose is:
A kind ofly obtain the method that TF is moved in first pulse for data carrier, the mark that described data carrier has multisession and forms by the light beam of being modulated by one or more driving pulses,
Described method comprises the steps:
A) produce a figure signal, described figure signal comprises:
A1) it is the space part of the adjacency of QT that a measuring-signal, described measuring-signal have mark part and its length-specific that its length-specific is PT, and wherein T is a reference period, P be positive integer and Q be positive integer and
A2) reference signal, described reference signal have the space part of the adjacency of the mark part of predetermined length and predetermined length, and described reference signal is positioned near the described measuring-signal and is used to determine near measuring-signal benchmark edge;
B) figure signal is stored;
C) produce one or more one or more driving pulses that conform to the described mark part of figure signal;
D) on data carrier, form space and mark by light beam according to a plurality of driving pulse modulation;
E) mark and the space that are recorded on the data carrier are duplicated, so that the reproducing signals that acquisition is duplicated;
F) obtain poor between the figure signal of the reproducing signals that duplicates and storage; With
G) obtain first pulse that is used for original signal by this difference and move TF, it is the sequence of the mark part of PT that described original signal comprises space part and the length that a length is QT.
According to further design of the present invention, described measuring-signal has the mark and the space that has all lengths that have all lengths, each mark is represented a group with a mark lengths or a plurality of mark lengths, a group with a space length or a plurality of spaces length is represented in each space, and wherein said reference signal have one be included in measuring-signal in the longest project team in the mark lengths that conforms to of mark lengths with one be included in measuring-signal in the longest project team in the mark lengths that conforms to of space length.
According to further design of the present invention, for a plurality of mark lengths and space length combination are obtained first pulse and moved TF by changing P and Q.
According to further design of the present invention, figure signal comprises to be used to realize numeral and to change DSV to be zero adjustment signal.
A kind ofly obtain the method that final pulse moves TL for data carrier,
Described data carrier has
Multisession and
The mark that forms by the light beam modulated by one or more driving pulses,
Described method comprises the steps:
A) produce a figure signal, described figure signal comprises:
A1) it is the space part of the adjacency of QT that a measuring-signal, described measuring-signal have mark part and its length-specific that its length-specific is PT, and wherein T is a reference period, P be positive integer and Q be positive integer and
A2) reference signal, described reference signal have the space part of the adjacency of the mark part of predetermined length and predetermined length, and described reference signal is positioned near the described measuring-signal and is used to determine near measuring-signal benchmark edge;
B) figure signal is stored;
C) produce the one or more driving pulses that conform to the described mark part of figure signal;
D) on data carrier, form space and mark by light beam according to a plurality of driving pulse modulation;
E) mark and the space that are recorded on the data carrier are duplicated, so that the reproducing signals that acquisition is duplicated;
F) obtain poor between the figure signal of the reproducing signals that duplicates and storage; With
G) obtain the final pulse that is used for original signal by this difference and move TL, it is the sequence of the mark part of PT that described original signal comprises space part and the length that a length is QT.
According to further design of the present invention, described measuring-signal has the mark and the space that has all lengths that have all lengths, each mark is represented a group with a mark lengths or a plurality of mark lengths, a group with a space length or a plurality of spaces length is represented in each space, and wherein said reference signal have one be included in measuring-signal in the longest project team in the mark lengths that conforms to of mark lengths with one be included in measuring-signal in the longest project team in the mark lengths that conforms to of space length.
According to further design of the present invention, for a plurality of mark lengths and space length combination are obtained final pulse and moved TL by changing P and Q.
According to further design of the present invention, figure signal comprises to be used to realize numeral and to change DSV to be zero adjustment signal.
Data carrier according to a first aspect of the invention has many sessions that are used to write down the information of representing with the space between mark and mark, send a light beam by session and form mark to data carrier, described light beam is modulated by one or more driving pulses, wherein according to the quantity of the length adjustment driving pulse that is recorded in the mark part in the original signal on the session, data carrier comprises: a data recorded area that is used for record data, with a control information recording areas, this district is used to store the numerical value of final pulse position Td that the numerical value of the first pulse position Tu of at least one reference position that is used to determine the mark that is recorded and at least one are used to determine the end position of the mark that is recorded.
Thereby when existing concrete difference, compact disk structure and/or recording film composition can form mark and space according to this tracer signal, and realize best record by to the duplicating and adopt these values to produce the tracer signal of the bests of these adjusted values Tu and Td.
Data carrier according to a second aspect of the invention, according to the mark part of tracer signal and directly more specifically determine mark starting position Tu in the length in the space of mark part front, and according to the mark part in the original signal and directly determine mark end position Td in the length in the space of mark part back.
Thereby hot convergence effect that can be when duplicating and heat is disturbed and when duplicating the balanced device distortion compensate, realize the record that shake is very little.
Data carrier according to a third aspect of the present invention be used as the first reference point R1 in forward position of the mark part in the original signal to be recorded and first pulse in a plurality of driving pulses first along between mistiming TF represent the first pulse position Tu, and the second reference point R2 of the specific known location of being correlated with the back edge with the mark part in the original signal that remains to be write down and the mistiming TL between the back edge of the final pulse of a plurality of driving pulses represent final pulse position Td.
Thereby can more accurately obtain mark starting position Tu and mark end position Td.
In data carrier according to a fourth aspect of the present invention, represent the length of the length of the mark part in the original signal and the space part between the mark part with numerical value of N T, wherein T is that reference period and N are the positive integer from n1 to n2.Mark and space part are divided into a plurality of groups that are used for that mark begins to adjust with end position according to the length in mark and space respectively in addition; Be that each adjustment group is set first concrete pulse position Tu and the numerical value of final pulse position Td.
Thereby can a plurality of mark lengths and space length be combined in the scale that the mode in the independent group is dwindled circuit by adopting.By reducing the quantity of mark lengths in group and space length even can realize shaking very little record, and thereby can when shortening mark and space length, increase the quantity of grouping along with shortening mark and space length.
Data carrier according to a fifth aspect of the present invention can be divided into three groups with mark part according to length, and according to length the space part is divided into three groups.
Data carrier according to a sixth aspect of the invention can be divided into four groups with mark part according to length, and according to length the space part is divided into four groups.
Can realize shaking very little record by the quantity of mark and space length being divided into groups more subtly and increase the adjustment group in addition.
The data carrier of the 7th aspect according to the present invention in the length and space partial-length that shorten mark part, increases the quantity of adjustment group.
Short mark and space occurrence frequency are higher, and adopt the reference signal of a signal of high occurrence frequency as the adjustment mark position, compare as reference signal with the signal that adopts low occurrence frequency, can realize shaking littler record.
In the data carrier according to an eighth aspect of the present invention, n1 be 3 and n2 be 11.
In data carrier according to a ninth aspect of the present invention, partly be divided into three groups according to length mark, i.e. 3T, 4T and 5T or be longer than the mark of 5T, and be divided into three groups, i.e. 3T, 4T and 5T or the space of being longer than 5T according to length space part.
In data carrier according to a tenth aspect of the present invention, partly be divided into four groups according to length mark, be 3T, 4T, 5T and 6T or the mark of being longer than 6T, and be divided into four groups, be i.e. 3T, 4T, 5T and 6T or the space of being longer than 6T according to length space part.
In data carrier according to an eleventh aspect of the present invention, there is two or more application to have the method for the Tu and the Td of a plurality of pulses, and represents that the information of application process is pre-stored in the control information posting field.
In data carrier according to a twelfth aspect of the present invention, the method of using Tu adopts Tu to change the rising edge of first driving pulse, and its width is changed, adopt Td to change the position of the negative edge of last driving pulse with the method for using Td, and don't its width is changed.
In according to the data carrier aspect the 13 of the present invention, the method of using Tu adopts Tu to change the width of first driving pulse, and its negative edge position is changed, adopt Td to change the width of last driving pulse with the method for using Td, and don't its rising edge position is changed.
In according to the data carrier aspect the 14 of the present invention, the information that the method for Tu and Td is used in expression is recorded in according to the recording of information direction and is positioned on the position of record position front of Tu and Td numerical value.
The 15 aspect of the present invention relates to a kind of method that is used to obtain the first pulse position Tu of data carrier, described data carrier has multisession, send light beam by session and form mark to data carrier, described light beam is modulated by one or more driving pulses, wherein determine the quantity of driving pulse according to the length that remains to be recorded in the mark part of the original signal on the session, with a control information posting field, described zone has thereon at least one of record first pulse position Tu numerical value and a final pulse position Td numerical value, wherein change the first pulse position Tu and the final pulse position Td of driving pulse at least, be equal to or less than a specific numerical value thereby make to duplicate to shake.Described method comprises: produce a figure signal, described figure signal comprises the mark part of the order with particular length PT and the figure with space part of particular length QT, wherein T is a reference period, and P is that positive integer and the Q from n1 to n2 is the positive integer from n1 to n2; The graphics signal; Produce a plurality of driving pulses according to figure signal; Be formed on space and mark on the data carrier by producing and sending light beam according to a plurality of driving pulses modulation to data carrier; The mark and the space that are recorded on the data carrier are duplicated; Relatively and obtain poor between the combination of mark in the mark in the reproducing signals through duplicating and the combination of space part and the figure signal of storing and space part; The first pulse position Tu with the original signal that draws the sequence that is used to include the mark part that space part that its length is QT and its length is PT by this difference.
According to the 16 aspect of the present invention, more specifically be to draw the first pulse position Tu of the combination that is used for a plurality of mark lengths and space length by changing P and Q.
According to the 17 aspect of the present invention, more specifically be that figure signal comprises one and is used for realizing that numeral and variation (DSV) are 0 adjustment signal.
The 18 aspect of the present invention relates to a kind of method that is used to data carrier to obtain final pulse position Td, described recording medium has multisession, send the mark that light beam forms by session to data carrier, described light beam is modulated by one or more driving pulses, wherein determine the quantity of driving pulse according to the length that remains to be recorded in the mark part of the original signal on the session, with a control information posting field, described zone has thereon at least one of record first pulse position Tu numerical value and a final pulse position Td numerical value, wherein change the first pulse position Tu and the final pulse position Td of driving pulse at least, be equal to or less than a specific numerical value thereby make to duplicate to shake.This method comprises: produce a figure signal, described figure signal comprises the mark part of the order with length-specific PT and the figure with space part of length-specific QT, wherein T is a reference period, and P is that positive integer and the Q from n1 to n2 is the positive integer from n1 to n2; The graphics signal; Produce a plurality of driving pulses according to figure signal; By producing and sending the light beam of modulating according to a plurality of driving pulses, be formed on space and mark on the data carrier to data carrier; The mark and the space of record are replicated on the data carrier; Relatively and obtain poor between the combination of mark in mark in the reproducing signals through duplicating and the combination of space part and the figure signal of storing and space part; To be used to include its length that is used for original signal be that the space part of QT and its length are the first pulse position Tu of sequence of the mark part of PT with being drawn by this difference.
Thereby by adopting the very short simple special pattern of its graphic length can accurately obtain mark starting position Tu and mark end position Td.
Preferably according to nineteen of the present invention aspect, this method is obtained the final pulse position Td that is used for a plurality of mark lengths and space length combination by changing P and Q in addition.
Preferred the 20 aspect according to the present invention in addition, the figure signal that this method is used comprises one and is used for realizing that numeral and variation (DSV) are 0 adjustment signal.
The 21 aspect of the present invention relates to a kind of equipment of obtaining the first pulse position Tu for data carrier, described recording medium has multisession, send the mark that light beam forms by session to data carrier, described light beam is modulated by one or more driving pulses, wherein determine the quantity of driving pulse according to the length that remains to be recorded in the mark part of the original signal on the session, with a control information posting field, described zone has thereon at least one of record first pulse position Tu numerical value and a final pulse position Td numerical value, wherein change the first pulse position Tu and the final pulse position Td of driving pulse at least, be equal to or less than a specific numerical value thereby make to duplicate to shake.This equipment comprises: the unit 125 that is used to produce a figure signal, described figure signal comprises the mark part of the order with length-specific PT and the figure with space part of length-specific QT, wherein T is a reference period, and P is that positive integer and the Q from n1 to n2 is the positive integer from n1 to n2; The unit 120 that is used for the graphics signal; Be used for producing the unit 111 of a plurality of driving pulses according to figure signal; Be used on data carrier, forming unit 109, the 103-106 of space and mark by light beam according to a plurality of driving pulse modulation; Be used for will record mark and space be replicated in unit 105-108,112-115 on the data carrier; Be used for comparison and obtain the mark of the reproducing signals that duplicates and the figure signal of space combination and storage in the unit 120 of mark and the space difference between making up; Obtain first pulse position Tu that is used for original signal and the unit that the first pulse position Tu is stored with being used for by this difference, it is the sequence of the mark part of PT that described original signal comprises space part and the length that length is QT.
Preferably according to the 22 aspect of the present invention, be that a plurality of mark lengths and space length combination are obtained the first pulse position Tu in addition by changing P and Q.
In addition preferably according to the 23 aspect of the present invention, preferably combination is classified, and wherein copied cells comprises a balanced device 114, and as long as longest mark and the shortest being marked in the same classification, then the ratio between the output amplitude of the output amplitude of balanced device and the balanced device when the frequency of the shortest mark is equal to or less than 3dB when the frequency of longest mark.
Thereby can reduce the distortion of the balanced device when duplicating, and can realize shaking very little record.
Preferably according to the 24 aspect of the present invention, figure signal comprises that one is used to realize that DSV is zero adjustment signal in addition.
The 25 aspect of the present invention relates to a kind of equipment that is used to data carrier to obtain final pulse position Td, the mark that described data carrier has multisession and forms by the light beam of being modulated by one or more driving pulses, wherein determine the quantity of driving pulse according to the length of the mark part in the original signal that is recorded on the session, with a control information posting field, described zone has thereon at least one of record first pulse position Tu numerical value and a final pulse position Td numerical value, wherein change the first pulse position Tu and the final pulse position Td of driving pulse at least, be equal to or less than a specific numerical value thereby make to duplicate to shake.This equipment comprises: the unit 125 that is used to produce figure signal, described figure signal comprises: one has the sequence notation part of length-specific PT and the figure with space part of length-specific QT, wherein T is a reference period, and to be n1 be the positive integer from n1 to n2 to the positive integer of n2 and Q to P; The unit 120 that is used for the graphics signal; Be used for producing the unit 110 of a plurality of driving pulses according to figure signal; Be used for also this light beam being launched on data carrier, form unit 109, the 103-106 of space and mark by producing according to the light beam of a plurality of driving pulse modulation; Be used for will record mark and space be replicated in unit 105-108,112-115 on the data carrier; Be used for comparison and obtain the mark of the reproducing signals that duplicates and the figure signal of the combination of space part and storage in the unit 120 of mark and the space part difference between making up; Obtain final pulse position Td that is used for original signal and the unit 127 that the first pulse position Tu is stored with being used for by this difference, described original signal comprises the sequence of the mark part of the space part of a length QT and length PT.
Preferably according to the 26 aspect of the present invention, be that a plurality of mark lengths and space length combination are obtained the first pulse position Tu in addition by changing P and Q.
In addition preferably according to the 27 aspect of the present invention, combination is classified, and copied cells comprises a balanced device 1514, and as long as longest mark and the shortest being marked in the same classification, then the ratio between the output amplitude of the output amplitude of balanced device and the balanced device when the frequency of the shortest mark is equal to or less than 3dB when the frequency of longest mark.
Preferably according to the 28 aspect of the present invention, figure signal comprises that one is used to realize that DSV is zero adjustment signal in addition.
The second nineteen aspect of the present invention relates to a kind of record and copying equipment that writes down and duplicate at data carrier, described data carrier has multisession, send the mark that light beam forms by session to data carrier, described light beam is modulated by one or more driving pulses, wherein determine the quantity of driving pulse according to the length that remains to be recorded in the mark part of the original signal on the session, with a control information posting field, described zone is used to write down about using the information in the space between mark and mark, and has thereon at least one of record first pulse position Tu numerical value and a final pulse position Td numerical value, wherein change the first pulse position Tu and the final pulse position Td of driving pulse at least, be equal to or less than a specific numerical value thereby make to duplicate to shake.This record and copying equipment comprise: be used for unit 1505-1508,1512-1517 that the prerecord first pulse position Tu and final pulse position Td on data carrier are duplicated; Be used for unit that the first pulse position Tu that duplicates and final pulse position Td are stored; Be used for the unit 1510 that produces driving pulse and the driving pulse that produces is proofreaied and correct according to data acknowledgment signal according to the first pulse position Tu and final pulse position Td; Be used for sending light beam, so that on data carrier, form unit 109, the 103-106 of space and mark according to the driving pulse of proofreading and correct.
Preferably according to the 30 aspect of the present invention, copied cells comprises a balanced device 1514 in addition, and the ratio between the output amplitude of the output amplitude of the balanced device when the frequency of longest mark and the balanced device when the shortest mark frequency is equal to or less than 3dB.
The 31 aspect of the present invention relates to a kind of manufacturing equipment of making data carrier, described recording medium has multisession, send the mark that light beam forms by session to data carrier, described light beam is modulated by one or more driving pulses, wherein determine the quantity of driving pulse according to the length that is recorded in the mark part of the original signal on the session, with a control information posting field, described zone is used to adopt the space recorded information between mark and mark, and has thereon at least one of record first pulse position Tu numerical value and a final pulse position Td numerical value, wherein change the first pulse position Tu and the final pulse position Td of driving pulse at least, be equal to or less than a specific numerical value thereby make to duplicate to shake.This equipment comprises: the unit 2701 that is used to the driving pulse sequence that the first pulse position Tu that obtains in advance and final pulse position Td numerical value are stored; Be used for method of adjustment information-storing device 2702 that the information of expression pulse position method of adjustment is stored; Be used for converting method of adjustment information, the first driving pulse position Tu and last driving pulse position Td to be used to write down and be used to produce reproducing signals unit 2703; With the laser generation unit 2704,2705,2706 that is used for producing laser beam according to tracer signal.
Description of drawings
The present invention is described further below in conjunction with accompanying drawing, so that realize the present invention comprehensively understood and understand other purpose of the present invention and instruction.
Fig. 1 is the block diagram according to the optical data recording equipment of the first embodiment of the present invention;
The signal of Fig. 2 in first embodiment shown in Figure 1, using;
Fig. 3 is the recording impulse sequence in first embodiment shown in Figure 1;
Fig. 4 A and 4B move table for typical pulse in first embodiment shown in Figure 1;
Fig. 5 is used for illustrating the group technology at first embodiment shown in Figure 1;
Fig. 6 is used for illustrating the group technology at first embodiment shown in Figure 1;
Fig. 7 is used for illustrating the group technology at first embodiment shown in Figure 1;
Fig. 8 is used for illustrating the group technology at first embodiment shown in Figure 1;
Fig. 9 is used for illustrating the group technology at first embodiment shown in Figure 1;
Figure 10 is the frequency characteristic curve diagram that duplicates balanced device among first embodiment shown in Figure 1;
Figure 11 illustrates the signal that is applied to first embodiment shown in Figure 1;
Figure 12 illustrates the signal that is applied to first embodiment shown in Figure 1;
Figure 13 illustrates the signal that is applied to first embodiment shown in Figure 1;
Figure 14 illustrates the signal that is applied to first embodiment shown in Figure 1;
Figure 15 is the block scheme of optical data recording equipment according to a second embodiment of the present invention;
Figure 16 is the planimetric map of the data carrier of second embodiment shown in Figure 15;
Figure 17 illustrates the signal that is applied to second embodiment shown in Figure 15;
Figure 18 is illustrated in the recording impulse sequence of second embodiment shown in Figure 15;
Figure 19 moves table for the typical pulse at second embodiment shown in Figure 15;
The oscillogram that Figure 20 moves for explanation first pulse of the present invention;
The oscillogram that Figure 21 moves for explanation final pulse according to the present invention;
The oscillogram that Figure 22 adjusts according to first pulse width of the present invention for explanation;
Figure 23 is the oscillogram of explanation according to final pulse width adjustment of the present invention;
Figure 24 moves table for other pulse according to the present invention;
Figure 25 is the planimetric map of data carrier of the present invention;
Figure 26 is the planimetric map of another data carrier of the present invention;
Figure 27 is used for female CD of the present invention is carried out the block scheme of the system of photoetching;
Figure 28 illustrates the signal that is used for first embodiment shown in Figure 1.
Embodiment
To contrast accompanying drawing below is illustrated embodiments of the invention.
To contrast accompanying drawing below is illustrated according to a preferred embodiment of the invention optical data recording method.Fig. 1 is the block scheme of optical data recording equipment according to a first advantageous embodiment of the invention.Here it is to be noted that the main user of optical disk recording device is producer and other commercial user who produces CD.
As shown in Figure 1, a CD 101 has many sessions concentric or spiral, spindle motor 102, semiconductor laser 103, collimation lens 104, beam splitter 105, object lens 106, convergent lens 107, photodetector 108, drive circuit for laser 109, pulse walking circuit 110, what have the identical delay time delays circuit 128 and 129, pulse producer 111, prime amplifier 112, low-pass filter 113, duplicate balanced device 114, digitizer 115, phaselocked loop 116, separate mediation error correction circuit 117, replicating data signal 118, power adjusting circuit 119, pulse position biasing metering circuit 120, switch 121, switch contact 122,123 and 124, figure signal generator 125, be used to connect the bus 126 of pulse position biasing metering circuit 120 and pulse walking circuit 110 and be used for the storer 127 that stored record has pulse mobile message table.
Optical recording apparatus shown in Figure 1 is used to generate the table shown in Fig. 4 A.Shown in Fig. 4 A and then be transmitted in the storer of another recording unit shown in Figure 27 by the table that the recording unit shown in Fig. 1 generates, and be recorded in the predetermined recording district of CD of all making.
Here it is to be noted that the shaven head of optical data recording equipment shown in Figure 1 comprises semiconductor laser 103, collimation lens 104, light beam separation scraper 105, object lens 106, convergent lens 107 and photodetector 108.When being contained in a CD 101 on the optical data recording equipment, shaven head moves to a section that is used for determining the optimum position of the reference position of each mark and end position.
The section that should determine best starting and ending position is the interior circle district of CD or a zone in the cylindrical district, and this zone is outside the user data posting field.Typical zone is the driving test section of CD.Switch touches contact 122 and 123 121 this moments.
Here it is to be noted that if the recording unit of optical disc production producer special use, then this zone that is used for the position of definite best starting and ending can be a user data area.
As Fig. 2 first figure signal 201 as the output signal of figure signal generator 125, the output signal 202 of pulse producer 111, the output signal 203 of pulse walking circuit 110 are shown, and as the marker graphic 204 that on the record session at CD 101 to the laser output power modulation result between peak power and bias power level, forms according to output signal 203.It is to be noted, although signal 201,202 and 203 is not produced simultaneously, however consideration for convenience, so their appropriate section in each signal all is vertically aligned.
In first figure signal 201, mark part 209,211,213,215,217 and 219 is the signal sections that form mark according to this signal on CD, and space part 210,212,214,216,218 and 220 is the space parts that occur as the space on CD.Also set in addition, mark part 209 after space part 220, thereby make first figure signal 201 comprise the figure that mark part and space part 209 to 220 repeat.
For example when adopting the marker edge recording method that the data that produced by the modulation of 2,10 run length are write down, mark and space have for the shortest length of 3T and are the longest length of 11T, and wherein T is a reference period.Mark part 209 is a 6T signal (below be called the 6T mark part), space part 210 is 6T spaces, and 211 is 3T marks, and 212 is 6T spaces, 213 is 6T marks, 214 is 6T spaces, and 215 is 6T marks, and 216 is 4T spaces, 217 is 6T marks, 218 is 6T spaces, and 219 is that a 7T mark and 220 is 6T spaces.
It is to be noted, if numeral and change (DSV) be mark in a specific period and space length with, then when passing through to insert signal 219 and 220 never mark and space, the numeral that draws and change actually when being zero can obtain having the little direct current component or the reproducing signals of low frequency part.Duplicating a signal with a plurality of direct current components or low frequency part will miss in digitizer 115 and generate a signal that has the order of 0 and 1 mistake.
For avoiding the appearance of this point, will insert as guaranteeing numeral and changing actual to first figure signal 201 is a 7T mark part 219 and the 6T space part 220 of 0 compensating signal.Specifically, first figure signal 201 of generation should make mark part 209,211,213,215,217 and 219 cycles equal space part 210,212,214,216,218 and 220 with 34T and 34T.To calculate numeral and variation (DSV) as cycle of the mark part of positive number and cycle addition as the space part of negative.As a result of, the numeral of first figure signal 201 and be changed to 0.
Convert first figure signal 201 to pulse train by pulse producer 111, draw pulse producer output signal 202.Shown in Fig. 3 corresponding to the pulse output of the pulse producer 111 of 3T to 11T length mark.
With the 6T signal among Fig. 3 is example, and the pulse when signal begins is known as first pulse 301, and the pulse at the signal ended place is a final pulse 304.Pulse between first pulse 301 and final pulse 304 is known as multiple-pulse 302 and has some cycles.
Two multiple-pulses 302 are arranged in the 6T mark, three multiple-pulses are arranged in the 7T mark, and a multiple-pulse is arranged in the 5T mark.Therefore clearly, every increase 1T, first and final pulse between the quantity of multiple-pulse 302 add one, and the every minimizing of signal length 1T, then multiple-pulse quantity subtracts one.Therefore, 4T mark only comprises first and last pulse, and do not have first and last pulse between multiple-pulse.In addition, a 3T mark has only a pulse.
Here it is to be noted that the time basic length of first pulse is 1.5T in this preferred embodiment, final pulse is 0.5T, and multipulse length also is 0.5T.But the present invention is not limited thereto, and the length of these pulses, quantity or cycle can be carried out necessary variation according to the structure of CD 101.
As mentioned above, first figure signal 201 and pulse producer output signal 202 be not when identical on the base, but to the difference between the forward position of first pulse of the output signal 202 of the forward position of any one concrete mark part first figure signal 201 and pulse signal generator all is identical, and also is identical to the back edge of any concrete mark part first figure signal 201 and the difference on the back edge of the final pulse of pulse producer output signal 202.
The output signal 202 of pulse producer is the input of pulse walking circuit 110, and described circuit produces and exports a signal 203, and the position of first pulse and final pulse is moved in this signal.Fig. 4 A and 4B illustrate and are used to be offset the mark of first pulse and final pulse position and the combination in space.
Fig. 4 A moves table for adopting the pulse after method of the present invention is proofreaied and correct, and Fig. 4 B is the table before proofreading and correct.Symbol 3S3M, 4S3M etc. in the table of Fig. 4 B are a kind of addresses, and expression signal type and write the numerical value of this address: when for example reading a numerical value 3S3M as the address, and signal of this numeric representation, 3T is marked at after the 3T space in this signal.As following detailed description, being stored in the numerical value that moves TF with locational first pulse of 3S3M sign is needed moving when 3T is marked at after the 3T space.
These first pulses move the TF numerical example in this way the trial by using special test CD and Error processing draw, and the collection that is drawn is in the table of Fig. 4 A.For all having and the identical CD of structure of testing CD, store the content of complete table.The predetermined initial value of first pulse is stored in Fig. 4 A left-handed watch.In the right table of Fig. 4 B, store to the initial value before the final pulse shift calibrating.
According to mark with directly in the length in the space of its front, the position of first pulse is changed.In this preferred embodiment, mark and space are divided into three groups, i.e. 3T, 4T and 5T or be longer than 5T.Therefore determine nine different final pulse positions altogether.
Figure 20 be in first figure signal 201 shown in Fig. 2 6T mark 217 and at the enlarged drawing of the appropriate section of pulse producer output signal 202, as shown in the figure, 4T space 212 is directly in the fronts of 6T mark 217.The 6T mark that is connected on back, 4T space belongs to the 4S5M group in Fig. 4 A left-handed watch.To the mobile correction of carrying out for initial first pulse of this group storage be illustrated below.
By delaying circuit 128 output signal 202 of pulse producer is delayed a predetermined cycle, and signal then is delivered to pulse walking circuit 110.In present embodiment is given an example, should the predetermined cycle of delaying be 13T.In storer 127, first figure signal is analyzed, so that determine which group that belongs in 18 sets of signals, these sets of signals are 3S3M, 3S4M, 3S5M, 4S3M, 4S4M, 4S5M, 5S3M, 5S4M, 5S5M, 3M3S, 4M3S, 5M3S, 3M4S, 4M4S, 5M4S, 3M5S, 4M5S and 5M5S, still belong to front 10T or more macrocyclic signal.If for example the 6T mark 217 in first figure signal 201 of figure signal generator 125 outputs is connected on after the 4T space 216, then storer 127 detects, and this signal belongs to the 4S5M group.Judge that according to this amount of movement of table 4S5M0 position is then read and be stored in to 110 outputs of pulse walking circuit to storer 127.Pulse walking circuit 110 then moves first pulse that offers its pulse producer output signal 202 after predetermined delaying according to the initial movable numerical value of being read by 4S5M0.
To contrast mobile being described further of 0 pair first pulse of Fig. 1 and 2 below.When giving pulse walking circuit 110 by storer 127 announcement, will there be a figure that belongs to a particular group to arrive soon from delaying circuit 129, TF is moved in first pulse that it also receives this figure by storer 127 simultaneously.For example inform 110, one of pulse walking circuits when storer 127 and belong to the figure of 4S5M0 group, promptly 6T mark 217 is delayed circuit 129 certainly and is arrived after 4T space 216, and it also is sent as the 4S5M0 group simultaneously and reads first pulse and move TF.Pulse walking circuit 110 is then on the rising pulse edge of the 6T mark 217 of delaying circuit 129 certainly that receives, and promptly first pulse is moved TF and begun counting when the time R1 shown in Figure 20.Delay first pulse of circuit 128 outputs and delay one, promptly delay pulse and move TF1 by the cycle of pulse walking circuit 110 countings.
The rising edge R1 that moves with first figure signal 201 when pulse is a benchmark, for example use with shown in Figure 20 reference time R1 the mistiming indicating impulse move TF1.In this embodiment gave an example, pulse was moved TF and is approximately 3 nanoseconds.Here it is to be noted that first pulse is moved, but pulse width is constant.
The signal content that figure signal shown in Figure 2 comprises belongs in the table shown in Fig. 4 A 4 groups in 18 groups, i.e. 3M5S type in the cycle 221, the 5S3M type in the cycle 222, the 4S5M type in the cycle 223 and the 5M4S type in the cycle 224.Therefore partly move with these four types each pulse signal that conforms in first figure signal 201.
Therefore move pulse according to these, laser instrument is driven, so that to real marking record in addition.The mark 204 of formation shown in Figure 2.In a preferred embodiment of the present invention, first figure signal 201 that comprises part 209 to 220 shown in Figure 2 is output repeatedly and goes on record on the session of ring-type.When therefore finishing the record of a complete session, then session is replicated.As described in the following detailed explanation that also will carry out, duplicate and comprise by the conversion of the light signal of photodetector 108 output to electric signal, and then utilize prime amplifier 112, low-pass filter 113, duplicate balanced device 114 and 115 pairs of these electric signal of digitizer are handled, thereby obtain reproducing signals 205.Reproducing signals 205 is transfused to pulse position biasing metering circuit 120.Therefore the reproducing signals 205 from the monochromatic light road is inputed to pulse position biasing metering circuit 120 repeatedly.So more than 120 ground of pulse position biasing metering circuit reads out each cycle 221,222,223 and 224 relevant with the unlike signal type, and calculates the mean value in each cycle.
120 pairs of pulse position biasing metering circuits compare with the mean value of the type cycle 221,222,223,224 that conforms to and the same period that draws according to reproducing signals 205 that draw in first figure signal 201 of record when the record, so that whether detection any pulse position occurs are offset.With above-mentioned record and the signal that duplicates is example, and the mean value that the generated time of 4T space 216 and 6T mark 217 and corresponding cycle 224 in reproducing signals 205 draw in first figure signal 201 compares, and draws between the two poor.If it is poor to exist, then pulsed bias metering circuit 120 judges that pulse position is offset, and the difference that for this reason this is calculated sends to storer 127.Because this difference is the result of initial movable value 4S5M0, thereby in storer 127, will increase or reduce this initial movable value 4S5M0, realize correction the movement value of storing with this according to difference.The movement value of this correction then is rewritten into the 4S5M type.
It is to be noted, in the foregoing description is given an example, utilize single feedback control loop (by 110,109,108,112,115,120,126) that 4S5M is proofreaied and correct and be rewritten as to the movement value of storage.But obviously, also can use many feedback control loops, first pulse shown in Figure 20 be moved the value of TF and proofread and correct.
Moving of final pulse proofreaied and correct in a similar fashion.That is, changing the final pulse position according to the length in the space of mark lengths and back moves.Embodiment for example in, mark and space are divided into three groups according to length, i.e. 3T, 4T and 5T or be longer than 5T, and be that in nine possible marks/space combination each is determined pulse position and moved.Then use with calculating first pulse and move the mobile TL that the identical method of TF calculates final pulse.
Figure 21 is the enlarged drawing of the part of the output signal 202 of the pulse producer that conforms to 6T mark in first figure signal 201 shown in Figure 2.Adopting aforesaid and first pulse to move the identical mode of TF moves TL to final pulse and proofreaies and correct.But pulse is in the end moved under the situation of TL, with benchmark R2 biasing 2T forward to the end the cycle on the back edge of pulse be known as the time interval, and this time interval is adopted above-mentioned ring is that benchmark is proofreaied and correct with first pulse.This final pulse moves TL and is approximately 13 nanoseconds in this embodiment gives an example.It should be appreciated that, measure variation, but the final pulse width still remains unchanged even TL is moved in pulse in the end, and this embodiment for example in, along with pulse simply skew on time shaft, pulse width remains unchanged.
The mark 207 that the output signal 206 that adopts the correction pulse shown in Fig. 4 A to move the pulse walking circuit 110 that table draws also is shown in Fig. 2, is recorded as this output signal 206 results and by these mark 207 duplicated reproducing signals 208.Although it is inequality with original figure signal 201 to adopt original uncorrected pulse to move the reproducing signals 205 that table (Fig. 4 B) draws, there is not difference substantially adopting correction pulse to move between reproducing signals 208 that table (Fig. 4 A) draws and the original figure signal 201.
It is to be noted, adopt four in 201 pairs of 18 pulse movement values of first figure signal shown in Figure 2 to proofread and correct as mentioned above.Value to other adopts other figure signal similarly to proofread and correct.Specifically, adopt figure signal 1101 couples of 4M5S, 5S4M, 3S5M and 5M3S type shown in Figure 11 to proofread and correct; Adopt the type of figure signal 1201 couples of 4M4S, 3M3S, 4S4M and 3S3M shown in Figure 12 to proofread and correct; Adopt 1301 couples of 4M3S of figure signal shown in Figure 13,4S3M type to proofread and correct; Adopt as shown in figure 14 1401 couples of 3M4S of figure signal, 3S4M type to proofread and correct.
It is to be noted, adopt as shown in figure 28 2801 couples of 5M5S of figure signal and 5S5M to proofread and correct, or can determine error amount very simply.It is to be noted, 5M5S and 5S5M type are proofreaied and correct prior to other type priority.This be because the cycle in these marks and space is the longest and thereby not too be easy to be subjected to heat disturb so.Thereby it is very little to delay the cycle, and can be used for delaying the reference value in cycle as definite other.
Be identified for changing the signal type that first pulse and final pulse move according to following three main factors.
First factor is the hot convergence effect on recording film, hot interference volume and poor by hot interference volume that concrete mark/space combination causes when mark is write down.It is to be noted, above-mentioned heat is disturbed the process that means, in this process, conducted the space by the back and influenced the heating process that next mark begins to locate in the heat of record mark end point, and the heat when the next record mark begins be reversed conduction by the front the space and influence the cooling procedure of the mark end of front.
Can be by having the laser beam that forms the required lowest power level of mark and reduce the influence that the heat on recording film is assembled inserting a plurality of multiple-pulses between first and the last pulse and send.But, form multiple-pulse with fixed cycle, so these hot convergence effects can not be eliminated fully for the consideration of simplifying pulse producer 111.
The degree that hot convergence effect and heat are disturbed also depends on many factors, these factors comprise structure, the recording film of CD 101 characteristic, recording impulse, be used for the linear speed of record on CD 101 and the length of the shortest mark.By realizing that each best heat-transmission convergence effect and the hot interference in these three influence factors will be lowered to a certain degree.For this point is understood more all sidedly, it is different variation that how makes up because of mark and space that the let us concentrated area inquires into that following hot convergence effect and heat disturbs.
Shown in Fig. 4 A, each first pulse all is classified into as being used for judging first and final pulse nine types or of group moving.To contrast Fig. 5 to Fig. 9 below, to judging that according to the first above-mentioned factor any method of using in these nine types is illustrated.Fig. 5 illustrates the extensibility of the reference position that is used to judge a 11T mark and the relation in the space before the 11T mark.
Fig. 5 illustrates original signal 500, promptly is used to the binary signal waveform that writes down; Be recorded in the mark 501 on the data carrier; With reproducing signals 502, promptly according to the binary signal waveform that duplicates that is recorded in the mark 501 on the CD.Original signal 500, mark 501 and reproducing signals 502 are to have 11T is marked at the (result of the record mark of S * T) of sufficiently long space between the mark.Therefore the result as this sufficiently long space has reduced intersymbol interference to greatest extent.
Be to be noted that the space ts1 in the original signal 500 is equal to the time interval of the space tm11 in the reproducing signals 502.First and the position of final pulse be moved to and more approach this ideal value.Judging how many times mark should be moved, if only consider the mark starting position, can with first and final pulse roughly be divided into three groups.Do more comprehensively explanation below in conjunction with the method that original signal 520, mark 521 and 522 pairs of mark starting positions of reproducing signals group are determined.
Original signal 520 is the binary waveforms that are used to write down.But when this situation, be shorter than space in above-mentioned original signal 500 at the space ts21 between two 11T marks.Therefore the heat on the back edge of 11T mark 524 is conducted through the space 525 to next 11T mark 526, thereby will accelerate the beginning of 11T mark 526.Therefore the standard length of 11T mark 526 will increase a2.
So in reproducing signals 522 with original signal 520 in the time space of corresponding space ts31 of the time interval of space ts21 will be shortened, and therefore can not obtain correct reproducing signals.But by the prediction of extensibility that 11T mark 526 is begun to locate, and by to the rising edge of mark part tm22 in original signal delay but can obtain correct reproducing signals.The length of space ts21 changes in 3T to 11T scope each time T for this reason, and each space ts21 is write down a 11T mark, and every kind of situation is measured edge distance 527.
In Fig. 6, draw the result of this measurement.Transverse axis is represented the length 3T to 11T of each the space ts21 in the original signal 520 among the figure, and the longitudinal axis represents that the summation length of mark part tm20 and space part ts21 in the original signal 520 deducts poor along apart from r527.Because heat is disturbed, length is shorter when the space, for example 3T or 4T, thereby along with the shortening of space length, 11T mark 526 starting points will move forward, and promptly move to the direction that approaches preceding pulse.
Fig. 7 illustrates a kind of space with same length and is combined into method according to the common group of the numerical value shown on the longitudinal axis among Fig. 6.The space that its length is different is substantially divided respectively in three groups.This method produces three groups: 3T space, 4T space and 5T or the space of being longer than 5T.
In Fig. 8, further draw out these results and group.The shade grid represents to measure space/marker combination of obtaining.Black line is represented group.
As contrast as described in Fig. 5, the extension that begins to locate at the 11T mark changes according to the direct length in the space of its front, and can be divided into three above-mentioned group 3T, 4T and 5T or be longer than 5T.
Fig. 9 illustrates the result of the said determination that all row and column contrast Fig. 5 to Fig. 8 are implemented.As can be seen from Figure 9, move for determining first pulse, mark and space preferably be divided into above-mentioned more than three or three group 3T, 4T and 5T or be longer than 5T.
Final pulse moves according to mark lengths and directly changes in thereafter space length.For the identical reason that is used for first pulse, preferably identical with the space group more than three or three according to above-mentioned mark, promptly 3T, 4T and 5T or be longer than 5T move final pulse and determine.
It is to be noted that when measurement result was basic identical, for example from 5T to 11T, in the adjacent grid, these grids mutually in groups in the chart shown in Figure 9.This point can reduce the scale of pulse walking circuit 110.
As recognizing from above-mentioned explanation, employing is to the focusing adjustment by concrete mark/difference in size that the space combination causes, and with 3T or 4T space length in conjunction with being arranged in one group, this group and space length are that 5T or the above combination of 5T are separated, and the preferred embodiment of the present invention can realize first pulse is moved the control of moving with final pulse and can therefore be realized the record that its shake is very little according to mark/space figure.
In addition, employing is to the focusing adjustment by specific markers/difference in size that the space combination causes, and be that the combination of 3T and combination that space length is 4T are arranged in respectively in the group with space length, the preferred embodiment of the present invention can realize control that first pulse and final pulse are moved according to mark/space figure.
Duplicating balanced device 114 characteristics is second factor.The characteristic of duplicating balanced device 114 is with relevant such as beam spot size and the shortest factors such as mark lengths.The size of light beam spot is by the decision of the aperture of the wavelength of semiconductor laser 103 and object lens 106.
To contrast below Figure 10 in order to change because the mark that moves with final pulse is moved in first pulse that causes of this second factor and the method for space grouping is illustrated.
Figure 10 is the typical frequency characteristic figure that duplicates balanced device 114.This illustrates the amplitude ratio of equalizer output signal and input signal; Transverse axis is represented signal frequency, and the logarithmic scale on the longitudinal axis is represented output amplitude.The frequency of 3T, 4T, 5T and 11T signal is shown along transverse axis.It is to be noted that the frequency of 3T signal is very high, so the record of 3T signal and the mark that duplicates are very little, and the amplitude of the light signal that duplicates is therefore very low.So will adjust balancer characteristic, improve output amplitude, so that the decay of light frequency characteristic is compensated.This point can be achieved a little more than the Hi-pass filter of 3T or bandpass filter and in conjunction with using amplifier or not using amplifier by using its crest frequency.
Along with the shortening of short mark lengths, slope of a curve will increase, and promptly increase its mark or space length and be the output amplitude of high-frequency signal of 3T and its mark or space length and be high-frequency signal output amplitude poor of 11T.Therefore for example the difference between the output amplitude when output amplitude when the frequency of 5T and the frequency at 11T also increases.
If the mark that the difference of its output amplitude is very big is included in the identical group, to labeled bracketing so that change first and final pulse when moving, even to first and final pulse carry out record, so that hot convergence effect and the heat that can eliminate specially on recording film are disturbed, then duplicate balanced device 114 and also can hinder correct the duplicating of realization along the position.
So to mutually on the same group underlined difference of preferably duplicating the output amplitude characteristic of balanced device 114 should be as far as possible little.
The difference of duplicating the output amplitude of balanced device 114 during in addition preferably to the frequency of the output amplitude of duplicating balanced device 114 on the same group a plurality of marks mutually when the frequency of longest mark and the shortest mark should be equal to or less than 3dB.When being object with the frequency characteristic, this numerical value 3dB or 2 square root are corresponding to general.
In other words, under the situation of not considering frequency, when the signal of input same-amplitude, then the input signal of balanced device and output amplitude than usually be equal 2 subduplicate poor.As the preferred embodiments of the present invention by with output amplitude than being controlled at as to the 3dB of the threshold value of signal packets or less than 3dB, then can reduce when duplicating because the distortion that balanced device causes, and can realize shaking very little record and duplicating.
It is to be noted, using wavelength is that 650 millimicrons semiconductor laser 103, an aperture is 0.6 object lens 106, is the shortest mark lengths and (2 of 0.595 μ m, when 10) the run-length restriction modulation is write down the mark edge, be shorter than the mark of 5T, promptly 3T preferably is not included in the group identical with the 11T mark with the 4T mark.Consider the scale of pulse walking circuit 110 in addition, 5T or be longer than the mark of 5T, or 6T or the mark of being longer than 6T preferably are included in the identical group.In this embodiment gave an example, T was approximately 30 nanoseconds, and 3T is approximately 90 nanoseconds, and 11T is approximately 330 nanoseconds.
Scale that the 3rd factor is pulse walking circuit 110 and paired pulses move determines required degree of accuracy, and the limited scale of figure signal generator 125 and storer 127.
According to above-mentioned first and second factors, its very big mark or space of difference that heat is assembled or heat is disturbed is respectively placed in the different groups, and also is placed in the different groups by the mark of the output amplitude that causes significant difference of duplicating balanced device output.But along with the increase of group quantity, the quantity of storage register certainly will also will increase, and this point has increased the scale of pulse walking circuit 110.In addition, if increase the quantity of register, be used to then to determine that the quantity that is stored in the figure of the numerical value in the register also can increase.And no matter the numerical value of register still is to be provided with by the final user in factory, the time required to the set of register all will increase, and the interval that is used for register is carried out the required record session of set also will increase.
So must reduce the quantity of the group that is used for determining that first pulse and final pulse move to greatest extent.
As above according to the preferred embodiment, by the 5T mark is divided in identical group with the above mark of 5T, can reduce the scale of pulse walking circuit 110 and the scale of figure signal generator 125 to greatest extent.
Though, especially above-mentioned three factors are considered in the present embodiment, to determine in the set type shown in Fig. 4 A to the influence of determining to be subjected to different factors of the best packet in mark and space.
What here to point out is that before to the figure signal record, the setting of predetermined initial value is shown in Fig. 4 B.Can rule of thumb determine these initial values respectively, or also can all set them for identical numerical value.If adopt identical initial value to be used for all numerical value, for example 1 nanosecond, be the first pulse mobile storage in the 5S5M figure of Fig. 4 B left-handed watch, then be preferably all figures and store.Be adopted as the numerical value of 5M5S storage during situation in the right table of Fig. 4 B.It is to be noted, the determining of the setting value of 5S5M figure in this case should make the time between first pulse 301 and the multiple-pulse 302 be illustrated in figure 3 as 0.5T, and the setting value of 5M5S definite should to make the time of 304 of multiple-pulse 302 and final pulses be 0.5T.
Clearly, also can adopt other method to be identified for the setting of 5S5M and 5M5S numerical value.Example shown in Figure 28.
As shown in figure 28,2801 of the figure signals of the figure signal generator 125 in example have a kind of cycle 6T.And also illustrate among the figure pulse producer 111 output signal 2802, pulse walking circuit 110 output signal 2803 and as the mark 2804 that on the record session to the result of laser power output modulation between peak power and the bias power level, forms according to output signal 2803 at CD 101.It is to be noted, although signal 2801,2802 is not to generate on the base when identical with 2803, for convenience for the purpose of the mutual perpendicular alignmnet of appropriate section in each signal.
Figure signal 2801 expression in this case has the mark and the space in the 6T cycle of simple repetition, and thereby is included in 5S5M and 5M5S type in 18 graph style shown in Fig. 4 A.Then drive, so that mark 2804 is carried out record according to 2803 pairs of laser instruments of drive signal shown in Figure 28.In present embodiment is given an example, the figure signal shown in Figure 28 2801 is carried out record repeatedly around a complete circle that writes down session.After this session is recorded, then then be replicated.Duplicate the conversion of the light signal that comprises photodetector 108 to electric signal, and then with prime amplifier 112, low-pass filter 113 with duplicate 114 pairs of these electric signal of balanced device and handle.The reproducing signals 2805 that duplicates balanced device 114 outputs is added on asymmetric measure circuit 130 and the digitizer 115.Digitizer 115 is used for adjustment cut-off level signal 2809, make the output level that mark conforms in the output signal with digitizer identical, and this cut-off level signal 2809 is added on the asymmetrical metering circuit 130 with the interval of the output level that conforms to the space.
It is to be noted, in the foregoing description is given an example, adopt an independent feedback control loop (by 110,109,108,112,115,120,126) that 5M5S and 5S5M are proofreaied and correct and be rewritten as to the mobile numerical value of storage.Clearly, also can use a plurality of feedback control loops.As a result of can draw 5S5M and 5M5S numerical value, utilize this numerical value to carry out record with correct length the 6T mark.By to correction, also can carry out record to the mark in other group, and can realize shaking very little record with correct length as the physical length of the mark of benchmark.
The output signal 203 of pulse walking circuit 110 is inputs of drive circuit for laser 109, utilize drive circuit for laser that the power of laser instrument is modulated, make that laser instrument sends with peak power when output signal 203 is high, and laser instrument sends with bias power when signal is low, thereby forms flag sequence 204 as shown in Figure 2.
When duplicating, collimation lens 104 will convert directional light to by the laser beam that semiconductor laser 103 sends, and this directional light is projected onto on the beam splitter 105.The light that passes beam splitter 105 is focused on the luminous point by object lens 105, and then is projected onto on the CD 101.
Then collected by the light that CD 101 reflects, and turn back to beam splitter 105 by object lens 106.The light that convergent lens 107 is collected by beam splitter 105 reflections, and be focused on the photodetector 108.
The light that photodetector 108 will throw thereon converts electric signal to, and this electric signal is then amplified by prime amplifier 112.The output signal of prime amplifier 112 then is transferred by low-pass filter 113, and high-frequency signal partly is low pass filtering device and stops.Then duplicate 114 pairs of signals of balanced device and carry out equilibrium, this signal is then utilized a predetermined cut-off level to convert binary digital signal to by digital circuit 115.Therefore the reproducing signals that is converted into 0 and 1 sequence 205 of digital circuit 115 outputs is added on the pulse position offset measurement circuit 120.The interval 221,222,223 and 224 on the concrete edge in 120 pairs of reproducing signals 205 of pulse position offset measurement circuit is measured.
If normal space 9T 221 is longer than at interval in the edge of measuring shown in Fig. 2, then according to the electric current 5S3M that utilizes bus 126 to set, the setting that final pulse is moved 3M5S shown in Fig. 4 A is reduced difference between an interval of measuring 221 and the normal space 9T.If same along 222 being longer than normal space 9T at interval, then by bus with the set basis electric current 5S5M0 that 5S3M is moved in first pulse shown in Fig. 4 A set increase by one along at interval 222 and normal space 9T between difference.223 and 224 pairs of numerical value for 4S5M and 5M4S storage along the interval that same basis is measured are proofreaied and correct.
When these four settings are upgraded, again first figure signal 201 is write down and the edge is measured at interval.This process is carried out repeatedly being lower than until normal space and the difference between at interval measured and is applicable to all four simultaneously along predetermined threshold levels at interval.It is to be noted that for example when interval, edge 221 was measured, the edge of Yi Donging not was the negative edge of 6T mark 209.To along at interval 222 when measuring, the rising edge of 6T mark 213 does not move, and directly in front space is 6T space 212.
Does not move at mark/space figure on the edge that is positioned between mark and space, and described mark and space are known as reference signal at this.This edge is known as the benchmark edge in addition.If benchmark moves together along connecting same edge, then just can not correctly determine to move and set, this is because of the point of fixity of neither one as benchmark.Therefore the position on benchmark edge must be maintained fixed, and can not move along moving together with one.
Even the edge variation is not moved together with one in the edge of reference signal in addition, yet must change reference signal, so that make benchmark along unlikely mobile together with the skew edge.If for example reference signal comprises a shortest as far as possible mark, then need to change reference signal so that be the shortest mark determine any mobile settings the time, the reference signal edge can not moved.
If reference signal is comprised in the group identical with the longest signal, then same reference signal also is applicable to all settings shown in all Fig. 4 A, and can determine that more accurately mark begins and end position in various marks/space combination.
Although very little, along still distinguishing in the variation of position, even also be so in the longest sets of signals at mark, this is because the difference that the heat in the group that first pulse for a change and final pulse move is assembled and heat is disturbed is.But,, can wholely reduce coarse appearance along the position by selecting the high mark/space signal of occurrence frequency that also belongs to the group that comprises the longest as far as possible signal as reference signal as the preferred embodiments of the present invention.
In addition, owing to move the difference of duplicating the output amplitude of balanced device 114 in the group that moves with final pulse being used for changing first pulse, so during the different mark in copy package contains the group of the longest as far as possible mark/space signal, although very little, still differentiated in duplicating the output amplitude of balanced device.But as the preferred embodiments of the present invention, by selecting the high mark/space signal of occurrence frequency that also belongs to the group that comprises the longest as far as possible signal, in whole record and dubbing system, can wholely reduce coarse appearance along the position as reference signal.
By realizing, improved when real data writes down and realized the probability of reliable error correction by separating mediation error correction circuit 117 to the overall minimizing of edge in the appearance of coarse position.
It is to be noted,, will improve signal frequency that occurs and the output amplitude of duplicating balanced device along with the shortening of signal length.Therefore the selection of reference mark be will be referred to balance between occurrence frequency and output amplitude.In addition, although 5T or be longer than the mark of 5T and at interval in the preferred embodiment of the present invention in same sets of signals, adopt the 6T reference mark that the characteristic of duplicating balanced device is paid attention to.
It should be appreciated that in addition the initial value selected for 3SSM0 and 3M3S0 is set and must be realized that reference mark is the length records of employing correction.And can adopt different initial values according to the structure of CD 101.
In case finish record, then the second graph signal carried out record to first figure signal.Second graph signal 1101, the output signal 1102 of pulse producer 111, the output signal 1103 of pulse walking circuit 110 and the marker graphic 1104 that on the record session of CD 101, forms according to output signal 1103 of the output signal as figure signal generator 125 shown in Figure 11.Then using above-mentioned identical method utilizes first pulse shown in first concrete 201 couples of Fig. 4 A of figure signal to set that 5S4M and 3S5M and final pulse set 4M5S and 5M3S upgrades.
In case finish record, then the 3rd figure signal carried out record to the second graph signal.The 3rd figure signal 1201, the output signal 1202 of pulse producer 111, the output signal 1203 of pulse walking circuit 110 and the marker graphic 1204 that on the record session of CD 101, forms according to output signal 1203 of the output signal as figure signal generator 125 shown in Figure 12.1210 had identical time span and look like a continuous wave with 10T cycle (4T space and 6T mark) of 1213 with 1212 with 10T cycle (6T space and 4T mark) of 1211 in Figure 12.Therefore the signal 1210-1211 that measures has identical length with the signal 1212-1213 that then measures, and is difficult to accurately the signal of measuring separately and to it be measured.If the same length in the cycle by utilizing two 10T, then the minimum situation of shake can substitute with dither table and measure.Under other the situation of signal period, utilize to be used for that with the identical method of first graphical application 4S4M and 3S3M and final pulse setting 4M4S and 3M3S are set in first pulse of Fig. 4 A and to adjust and upgrade.
In case finish the record of the 3rd figure signal, then the 4th figure signal carried out record.The 4th figure signal 1301, the output signal 1302 of pulse producer 111, the output signal 1303 of pulse walking circuit 110 and the marker graphic 1304 that on the record session of CD 101, forms according to output signal 1303 of the output signal as figure signal generator 125 shown in Figure 13.Adopt the identical method of using with first figure signal that setting 4S3M of first pulse shown in Fig. 4 A and final pulse setting 4M3S are upgraded.
In case finish the record of the 4th figure signal, then the 5th figure signal carried out record.The 5th figure signal 1401, the output signal 1402 of pulse producer 111, the output signal 1403 of pulse walking circuit 110 and the marker graphic 1404 that on the record session of CD 101, forms according to output signal 1403 of the output signal as figure signal generator 125 shown in Figure 14.Adopt the method identical that setting 3S4M of first pulse shown in Fig. 4 A and final pulse setting 3M4S are upgraded with the 4th figure signal.
Therefore adopt the hot convergence effect that can be when the record occurs during to record according to the method for this preferred embodiment and heat to disturb and the balanced device distortion that occurs when duplicating compensates, therefore and by determining the mark starting position and determine the mark end position, can realize shaking very little record to mark/space figure according to the length of the mark of record with in the length in the space of mark back according to the length of the mark of record with in the length in the space of mark front.
In addition, by beginning compensation with end position to the record of first to the 5th figure with to mark, reduce with the skew on concrete benchmark edge to greatest extent and reduce the standard mark lengths to greatest extent, can determine that first pulse and the final pulse of its best move any signal graph that is not included in first to the 5th figure.Thereby can be on correct position when real data writes down, and therefore can realize shaking very little record with label record.
It should be appreciated that what adopt according to the method for the preferred embodiment is simple symbol figure, utilizes this simple symbol figure, needs only when DSV is not equal to 0, promptly can differ from the DSV basic controlling on 0.As mentioned above, DSV is reference signal in the concrete cycle, measured signal, and poor between mark and the space.
For example the mark summation of first figure signal 201 is that 34T and space summation also are 34T shown in figure 2.By with two kinds have different along mensuration mark at interval comprehensively in a figure, utilize less figure can determine in the setting shown in Fig. 4 A.Determine to set required time and the space of record session and the scale of figure signal generator 125 but also can be reduced to greatest extent.
As mentioned above, the offset of the output signal of 120 pairs of digitizers 115 of pulse position offset measurement circuit is measured, interval, edge or shake are detected at interval, change the table that is stored in the register 127 according to measurement result, and to signal of representing the pulse edge position of correction of pulse walking circuit 110 transmissions, so that first pulse and final pulse are offset.
And the output signal that can also make digitizer 115 in addition through general interface bus (GPIB) time of arrival every analyzer or other the analyzer that is used for measuring intervals of TIME or shake, time interval analyzer is connected with special purpose computer through a general purpose interface bus in addition, and the output signal of special purpose computer is added on the pulse walking circuit 110 through a small computer system interface (SCSI) or other bus interface.Recording unit needn't comprise pulse position offset measurement circuit 120 when this situation, and thereby can realize simplification to recording unit.
It is to be noted, because the preferred embodiment is offset first pulse and final pulse according to concrete mark/space combination, so Same Way also is applicable to the optimization according to a kind of pulse-width of recording method, utilize this recording method can change the pulse width of first pulse and final pulse.
Figure 22 illustrates according to another of present embodiment and realizes method for optimizing by changing pulse width, when the space length before the 6T mark is 6T, 4T and 3T, the signal section that conforms to 6T mark 213 in pulse producer output signal 202 with 6T mark 213 in first figure signal 201 among Fig. 2.
Change first pulse width according to the space length before mark and the mark.Therefore in the preferred embodiment, mark and space are divided into 3T, 4T and 5T or are longer than three groups of 5T, and will determine that mark is along moving for nine possible marks and space combination.
For example the rising edge of first pulse mobile uses the mobile TF corresponding to the rising edge of first figure signal 201 to represent.The negative edge of first pulse does not move.Because it is long that the space of front is 6T, so 6T mark 213 belongs to the 5S5M group, and TF1 is for being approximately 1 nanosecond.Space in front is 4T when long, the moving in the 4S5M group of the rising edge of first pulse, and TF2 is approximately 3 nanoseconds.When space in front was 3T length, the width of first pulse was in the 3S5M group, and TF3 is approximately 5 nanoseconds.It is to be noted that although the TF value changes, the first pulse negative edge does not move.What therefore change is first pulse width.
Figure 23 illustrates according to the third of present embodiment and realizes method for optimizing by changing pulse width, when the space length before the 6T mark is 6T, 4T and 3T, the signal section that conforms to 6T mark 213 in pulse producer output signal 202 with 6T mark 213 in first figure signal 201 among Fig. 2.
When this situation, for example two clock TL before the negative edge of mobile usefulness first figure signal 201 of the rising edge of final pulse are represented.The negative edge of final pulse does not move.Because it is long that the space of back is 6T, 6T mark 213 is in the 5S5M group, and TL1 is approximately 13 nanoseconds.When the space of back is 4T, the moving in 5M4S group of the rising edge of final pulse, and TL2 is approximately 11 nanoseconds.When the space of back was 3T, the width group of final pulse was the 5M3S group, and TL3 is approximately 9 nanoseconds.It is to be noted that although the TL value changes, the final pulse rising edge is constant.So what change is the final pulse width.
It is to be noted, change the whole bag of tricks outside pulse position or the pulse width and all can be used for control mark and begins and the mark end position, comprise the laser power when adjusting concrete pulse.Therefore the benefit that is intended to best titime for realization the present invention just need adopt best method with showing have table to be recorded to proofread and correct to these to the application of TF and TL value table.Can realize this point by record that control method is carried out or to the record that the predetermined coding of expression control method carries out.
To contrast accompanying drawing below is illustrated a kind of data carrier and the optical data recording method of the embodiment selective according to the present invention.Figure 15 is the block scheme according to the data carrier of second preferred embodiment of the present invention and optical data recording equipment.Shown in Figure 15: CD 1501, spindle motor 1502, semiconductor laser 1503, collimation lens 1504, beam splitter 1505, object lens 1506, convergent lens 1507, photodetector 1508, drive circuit for laser 1509, pulse walking circuit 1510, delay circuit 1528 and 1529, pulse producer 1511, prime amplifier 1512, low-pass filter 1513, duplicate balanced device 1514, digitizer 1515, trivially encircle 1516 mutually, separate mediation error correction circuit 1517, replicating data signal 1518, power adjusting circuit 1519 and storer 1520.
Figure 16 is the planimetric map of CD 1501.Be used for mark in for example at this embodiment and begin optimum position information with end position, promptly two shown in Fig. 4 A calibrated and by the table of determining described in the first embodiment of the present invention, be stored in the posting field 1601.These tables comprise by the disc manufacturing plant merchant be printed in the CD indenture and land or mark and space bit sequence in the circle district before dispatching from the factory.These two calibrated tables are finished by the disc manufacturing plant merchant, and are stored in advance on each CD.Therefore stored this two calibrated tables on the CD that the final user obtains, and this CD and coordinative composition of equipments use shown in Figure 15.
Optical data recording equipment shown in Figure 15 has a shaven head, and this shaven head comprises semiconductor laser 1503, collimation lens 1504, beam splitter 1505, object lens 1506, convergent lens 1507 and photodetector 1508.When CD 1501 is packed into optical data recording equipment and recording unit were implemented concrete operation to the identification CD, shaven head moved to and stores optimum mark and begin on the posting field 1601 with the end position tables of data, and reads canned data.Therefore the data of being read by posting field 1601 comprise the information that is collected among Fig. 4 A in two tables, and the table that duplicates is stored in the storer 1520.
To the CD of the production in enormous quantities that includes above-mentioned table of corrections be illustrated below.
Method at first giving an example as the first embodiment of the present invention by application begins with the definite of end position the table of corrections shown in Fig. 4 A to be edited to optimum mark.The content of this table is stored in the posting field 1601 of CD 1501, utilize laser instrument with the information photoetching on stamper, adopt when this stamper will be used to produce when the face sequence writes down posting field between indenture and line, CD 1501 is carried out mold pressing.
Figure 27 is the stamper system that is used for CD master-disc is carried out photoetching.Storer 2701 shown in Figure 27, method of adjustment number generator 2702, tracer signal generator 2703, photomodulator 2704, light-beam generator 2705, lens combination 2706, the glass master 2708 that is coated with photochromics 2707, universal stage 2709 and motor 2710.
Two table of corrections shown in Fig. 4 A are stored in the storer shown in Figure 27 2701.The method that is then used in adjustment first and final pulse is the output of method of adjustment number generator 2702, and then the content of two tables is the output of storer 2701.Tracer signal generator 2703 is then handled method of adjustment and table data, comprising modulation, interpolation error correction code, encryption and other necessary process, and produces the binary data that is used to write down.Its oscillation wavelength that is produced by Solid State Laser generator 2705 is that the laser beam of ultraviolet wavelength or similar wavelength is the energy by the output signal modulation of tracer signal generator 2703.Be fed the scioptics group and be incident upon on the photochromics 2707 of glass master 2708 through the laser beam of ovennodulation.This moment is by acting on or do not act on the record of the photochromics realization of glass master 2708 to binary signal to the corresponding disconnected preface of rotation of laser beam ground.It is to be noted, two tables that are stored in storer 2701 are recorded on the zone of interior round side of user data area, the user data area final user data are carried out record, and the method for adjustment data are recorded in the zone of the round side that is positioned at two stored zones of table.
Then the zone of ultraviolet laser effect is melted and makes the metal mold pressing stamper that has face between indenture and line with nickel or the spraying of metal pair glass substrate.This metal mold pressing stamper is used for as the punch die of producing compact disc substrate, forms the recording light film on described compact disc substrate.By two substrates are combined, wherein on a substrate, form recording film at least, make an independent CD.
As shown in figure 15, the collimated lens 1504 of laser beam that penetrated by semiconductor laser 1503 convert directional light to, and pass beam splitter 1505.To pass the optical convergence of beam splitter 1505 by object lens 1506, and project on the CD 1501 as luminous point.
Then the light that is reflected by CD 1501 is assembled by object lens 1506, and passes beam splitter 1505 once more.Assembled by convergent lens 1507 by the light that beam splitter reflects, and focus on the photodetector 1508.
Reproducing signals 1518, promptly the content of two tables and method of adjustment information then are stored in the storer 1520.Mark begins then to be fed to pulse walking circuit 1510 through bus 1521 with the best mobile message of end position.
When physical record, power adjusting circuit 1519 transfers to max power level or bias power level with laser drive circuit 1509.To contrast Figure 17 below is illustrated continuous signal flow.
Figure 17 illustrates the tracer signal 1701 of input pulse generator 1511, the output signal 1702 of pulse producer 1511 and the output signal 1703 of pulse walking circuit 1510.By laser power is formed record mark 1704 on the record session that is modulated at CD 1501 between max power level and the bias power level.It is to be noted that signal 1701,1702 is not with 1703 in fact on identical time shaft, but in Figure 17, only for the consideration of being convenient to understand, its appropriate section is a consistency from top to bottom.
In data acknowledgment signal 1701, mark part 1706,1708 and 1710 is to utilize its signal section that forms mark on CD, and space part 1707,1709 and 1711 ties up to the signal section that presents the space on the CD.
For example when the data that produce by (2,10) run-length restriction modulation being utilized a kind of mark when recording method is write down, mark and space have the shortest length 3T and the longest length 11T, and wherein T represents reference period.Mark part 1706 is 6T marks, and space 1707 is 6T spaces, the 1708th, and the 4T mark, the 1709th, the 4T space, the 1710th, 6T mark and 1711 is 6T spaces.
With reference to 6T signal among Figure 18 for example, the pulse when signal begins is known as first pulse 1801, and the pulse during signal ended is known as final pulse 1804.Pulse 1804 of first pulse 1801 and final pulses is known as multiple-pulse 1802 and has a fixed cycle.
Two multiple-pulses 1802 are arranged in the 6T mark, three multiple-pulses are arranged in the 7T mark and a multiple-pulse is arranged in the 5T mark.Clearly, first and final pulse between the quantity of multiple-pulse 1802 increase by 1 during at the every increase of signal length 1T.So the 4T mark only comprises first and final pulse, and between does not have multiple-pulse 1802.In addition, a 3T mark only comprises a pulse.
It is to be noted that the time basic length of first pulse is 1.5T in the preferred embodiment, final pulse is 0.5T, and multipulse length also is 0.5T.But the present invention is not limited on this length, and the length of these pulses can be carried out necessary variation according to the structure of CD 1501.
As mentioned above, data acknowledgment signal 1701 and output signal 1702 be not on same base for the moment.But to the difference between the rising edge of the rising edge of any one specific markers segment data record signal 1701 and output signal 1,702 first pulses all is identical, and also is identical to the difference between the negative edge of the negative edge of any specific markers segment data record signal 1701 and the final pulse of output signal 1702.
Pulse producer output signal 1702 is input signals of pulse walking circuit 1510, and the pulse walking circuit produces and exports a signal 1703, and the position of first pulse and final pulse is moved in this signal.Figure 19 illustrates the table that is stored in the storer 1520.
It is to be noted that the table in Figure 19 is identical with table among Fig. 4 A, Figure 19 illustrates and is used for mark and space combination that first pulse and final pulse position are offset.
According to the length in mark and direct space before mark, the position of first pulse changes.Mark and space are divided into three groups in this preferred embodiment, i.e. 3T, 4T and 5T or be longer than 5T.Thereby can determine the different final pulse position coldest days of the year end.
The final pulse position is similarly proofreaied and correct.Promptly the final pulse position is moved and change according to the length in the space of mark lengths and back.This embodiment for example in according to length 3T, 4T and 5T or be longer than the 5T mark and the space is divided into three groups, and be that in nine possible marks/space combination each determines that pulse position moves.Adopt then and with method that TF is moved in calculating first pulse identical described in first embodiment final pulse is moved TL and calculate.
The output signal 1703 of pulse walking circuit 1510 is input signals of drive circuit for laser 1509, the bias power laser beam when peak power laser beam when drive circuit for laser is created in high impulse in the output signal 1703 and low pulse.Mark 1704 sequences that produce shown in Figure 17.
Therefore can change mark according to the data-signal that optical data recording equipment was duplicated and inputed to will be used for according to record the time to predetermined zone on the CD begins and end position.Therefore optical data recording equipment can be realized the record to mark and space signal best, even also be like this when adopting the CD with different compact disk structures and recording film.
It is to be noted, needn't obtain best start and the end position information that is recorded in the CD specific region for all CDs.Specifically, if the variation between CD is very little, then can be used as the standard optimum value to the value obtained for the CD with the identical recordings film component of same structure record in addition.
In addition, if standard optimum value such as present embodiment are recorded in the specific region of CD for example in advance, and these standard values are used for as the default value when the mark of obtaining for reducing the best of shaking begins with the end position value, then obtaining optimum mark when physical record once more begins and the end position value, so that further overcome shake, then can reduce the required time of optimum process.In addition, although mark and space are divided into three groups in this preferred embodiment, i.e. 3T, 4T and 5T or be longer than 5T, the method for determining these groupings is with identical in above-mentioned first embodiment.With regard to first with regard to the optimum value that moves of final pulse is recorded on the CD, can adopt various other packet modes according to concrete condition.For example also can adopt four groups, i.e. 3T, 4T, 5T and 6T or be longer than 6T.
Shown in Figure 24ly move grouping sheet according to mark and space length 3T, 4T, 5T and 6T or the pulse of being longer than 6T.The quantity that increases the length group of employing can more accurately control first pulse according to concrete symbol figure and move with final pulse and move, thereby can realize shaking very little record.
It is to be noted that the preferred embodiment of the present invention is determined the mobile message of the best of first pulse and final pulse and stored, but the present invention is not limited to this.Only the best mobile message of a pulse in the paired pulses writes down determining that optimum pulse moves also to be useful, can to realize shaking very little record equally.
For the ordinary skill of this area obviously, although present embodiment for example moves the record that carries out to concrete mark and space first best and final pulse of combination and illustrates, as also adopting the recording method of the pulse width of a kind of change first pulse and final pulse as described in first embodiment.Even during with dissimilar CD, for example when compact disk structure or recording film not simultaneously, by the prerecord of optimum pulse width information also can be realized record in the specific zone of CD to the best of mark and sequences of spaces.
It is to be noted, change the whole bag of tricks beyond pulse position or the width and also can be used for mark is begun control with end position, comprising the Laser emission power that changes concrete pulse.Therefore for realizing that the benefit that is intended to realize best titime of the present invention adopts best method with showing have table to be recorded to proofread and correct to these to the application requirements of TF and TL table.
Figure 25 is the planimetric map of CD 2501.User data is recorded in data area 2502 in this embodiment gives an example.The information that expression is used for the method first pulse and final pulse adjusted according to the data-signal of input utilizes face between indenture and line (mark and space) sequence to be recorded in to be positioned at the zone 2503 in circle district.Mark best or standard begins and end position information, promptly as Fig. 4 A or table shown in Figure 24, utilizes face between indenture and line (mark and space) sequence to be recorded in the zone 2504.
So, promptly be to move first or final pulse, still change pulse width by recognizing that to being stored in duplicating of the data of zone in 2503 which kind of method of employing is used for mark and space are adjusted.
It is to be noted, add such as the variablees such as shape that project the laser spots on the CD by recording unit and can cause also realizing that the required optimum mark of best titime result begins the change with end position.For overcoming this point, when making CD, be recorded in the best in the CD specific region or standard information and be can duplicate and these initial values that are used to write down test be used to realize the optimization of the positional value of recording unit.
This point can reduce and be begun the quantity with the figure of end position to what those must write down so that determine best mark when real data writes down.Carry out the required time of optimization procedures but also reduce.
Figure 26 is the planimetric map of another CD 2601.User data is recorded in the data area 2602 in this embodiment gives an example.The information of the method that expression is adjusted first pulse and final pulse according to input data signal utilizes face between indenture and line (mark and space) sequence to be recorded in to be positioned at the zone 2603 in circle district of CD.Mark best or standard begins and end position information utilizes face between indenture and line (mark and space) sequence to be stored in the zone 2604.In addition, this CD 2601 comprises a test record zone 2605.
Adopt a kind of CD 2601 of this spline structure, read out the best approach and read out mark by zone 2603 and begin with end position information and use the method described in first embodiment of the invention according to this information and in zone 2605, carry out test record by zone 2604.This point can realize than only use will set the mode of prerecord on CD also will good record.
Here it is to be noted, be shown in when producing CD by containing the information of adjusting first pulse and final pulse as Figure 25 or 26 respectively and be recorded in and be positioned at the zone 2503 or 2603 that sides are justified in zone 2504 or 2604, recording mark best or standard in zone 2503 or 2603 begins and end position information, when the circle district begins to duplicate in by CD, promptly recording method can be determined at once, and the required time of any setting of implementing can be shortened according to recording method.
To those skilled in the art obviously, although be that example has been done above-mentioned explanation with the CD to the preferred embodiments of the present invention, the present invention is not limited thereto.Specifically, use the recording medium or the record of types such as tape or card and also can realize identical benefit, and can not depart from scope of the present invention with copying equipment.
Recognize that from above-mentioned optical recording apparatus according to the present invention carries out record to first to the 5th figure of record symbol sequence for example, and then these figures is duplicated, so as definite first and the best of final pulse move.First and/or the final pulse movement value of these the bests then is recorded on the recording medium when producing.Therefore when the final user recorded the information on the recording medium, this information can be replicated, and learns required time of best mobile message and effort thereby can shorten or eliminate recording unit.So can realize the record that precision is higher, and can realize shaking very little record to mark.
In addition, even adopt dissimilar CDs, promptly adopt CD with different discs structure or recording film composition, utilize the required mark of data-signal of the input of data carrier of the present invention by will representing different symbol figures to begin to be recorded in the specific zone of data carrier with the information of the variation of end position, and then when carrying out data recording, in recording unit, this information is duplicated and stored, can realize best record.
Though in conjunction with the preferred embodiments and contrast accompanying drawing the present invention is illustrated, it is to be noted any variation or to change all be conspicuous concerning those skilled in the art.This class variation and change should be considered as within the scope of the present invention.
Claims (8)
1. obtain the method that TF is moved in first pulse for data carrier for one kind, the mark that described data carrier has multisession and forms by the light beam of being modulated by one or more driving pulses,
Described method comprises the steps:
A) produce a figure signal, described figure signal comprises:
A1) it is the space part of the adjacency of QT that a measuring-signal, described measuring-signal have mark part and its length-specific that its length-specific is PT, and wherein T is a reference period, P be positive integer and Q be positive integer and
A2) reference signal, described reference signal have the space part of the adjacency of the mark part of predetermined length and predetermined length, and described reference signal is positioned near the described measuring-signal and is used to determine near measuring-signal benchmark edge;
B) figure signal is stored;
C) produce one or more one or more driving pulses that conform to the described mark part of figure signal;
D) on data carrier, form space and mark by light beam according to a plurality of driving pulse modulation;
E) mark and the space that are recorded on the data carrier are duplicated, so that the reproducing signals that acquisition is duplicated;
F) obtain poor between the figure signal of the reproducing signals that duplicates and storage; With
G) obtain first pulse that is used for original signal by this difference and move TF, it is the sequence of the mark part of PT that described original signal comprises space part and the length that a length is QT.
2. in accordance with the method for claim 1, wherein said measuring-signal has the mark and the space that has all lengths that have all lengths, each mark is represented a group with a mark lengths or a plurality of mark lengths, a group with a space length or a plurality of spaces length is represented in each space, and wherein said reference signal have one be included in measuring-signal in the longest project team in the mark lengths that conforms to of mark lengths with one be included in measuring-signal in the longest project team in the mark lengths that conforms to of space length.
3. in accordance with the method for claim 1, wherein obtain first pulse and move TF by changing P and Q for a plurality of mark lengths and space length combination.
4. in accordance with the method for claim 1, wherein figure signal comprises to be used to realize numeral and to change DSV to be zero adjustment signal.
5. obtain the method that final pulse moves TL for data carrier for one kind,
Described data carrier has
Multisession and
The mark that forms by the light beam modulated by one or more driving pulses,
Described method comprises the steps:
A) produce a figure signal, described figure signal comprises:
A1) it is the space part of the adjacency of QT that a measuring-signal, described measuring-signal have mark part and its length-specific that its length-specific is PT, and wherein T is a reference period, P be positive integer and Q be positive integer and
A2) reference signal, described reference signal have the space part of the adjacency of the mark part of predetermined length and predetermined length, and described reference signal is positioned near the described measuring-signal and is used to determine near measuring-signal benchmark edge;
B) figure signal is stored;
C) produce the one or more driving pulses that conform to the described mark part of figure signal;
D) on data carrier, form space and mark by light beam according to a plurality of driving pulse modulation;
E) mark and the space that are recorded on the data carrier are duplicated, so that the reproducing signals that acquisition is duplicated;
F) obtain poor between the figure signal of the reproducing signals that duplicates and storage; With
G) obtain the final pulse that is used for original signal by this difference and move TL, it is the sequence of the mark part of PT that described original signal comprises space part and the length that a length is QT.
6. in accordance with the method for claim 5, wherein said measuring-signal has the mark and the space that has all lengths that have all lengths, each mark is represented a group with a mark lengths or a plurality of mark lengths, a group with a space length or a plurality of spaces length is represented in each space, and wherein said reference signal have one be included in measuring-signal in the longest project team in the mark lengths that conforms to of mark lengths with one be included in measuring-signal in the longest project team in the mark lengths that conforms to of space length.
7. in accordance with the method for claim 5, wherein obtain final pulse and move TL by changing P and Q for a plurality of mark lengths and space length combination.
8. in accordance with the method for claim 5, wherein figure signal comprises to be used to realize numeral and to change DSV to be zero adjustment signal.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25990898 | 1998-09-14 | ||
| JP1998259908 | 1998-09-14 | ||
| JP1998350100 | 1998-12-09 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200410007852XA Division CN1282167C (en) | 1998-09-14 | 1999-07-08 | Data recording medium and device for recording and copying data |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1897122A true CN1897122A (en) | 2007-01-17 |
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ID=37609622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610100051 Pending CN1897122A (en) | 1998-09-14 | 1999-07-08 | Method for determining first and final impulse move tf/tl for data recording medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1897122A (en) |
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1999
- 1999-07-08 CN CN 200610100051 patent/CN1897122A/en active Pending
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