CN101393751A - Data recording method and data reproducing method - Google Patents
Data recording method and data reproducing method Download PDFInfo
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- CN101393751A CN101393751A CNA2008100888008A CN200810088800A CN101393751A CN 101393751 A CN101393751 A CN 101393751A CN A2008100888008 A CNA2008100888008 A CN A2008100888008A CN 200810088800 A CN200810088800 A CN 200810088800A CN 101393751 A CN101393751 A CN 101393751A
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Abstract
Provided is a data recording method, wherein if the shortest code length of the write code sequence is n (which is an integer equal to or greater than one), a write pulse waveform that has only one write pulse is assigned to recording mark making periods corresponding to codes with code lengths x of n, n + 1 and n+ 2, and a write pulse waveform that has multiple write pulses Pw is assigned to recording mark making periods corresponding to codes with code lengths x of n +3 or more. For the symbol with length of n, n + 1, when the number of the write pulse (Pw) contained in the write waveshape during the period of forming the recording mark is equal to the period number of bottom power level (Pb) between two recording pulse (Pw), the pulse width of the symbol length of m (namely the symbol length of m contained in the K-th Pb during the recording mark making period) is less than or equal to that of the symbol length of m + 1 (namely the symbol length of m + 1 contained in the K-th Pb during the recording mark making period), and the recording symbol rank is encoded by 17PP modulation encoding mode.
Description
The application is that application number was the 200480009272.2 (applyings date: 2004.3.25; Dividing an application denomination of invention: to the data record method and the device of recording medium).
Technical field
The present invention relates to recording medium irradiating lasers such as CDs, form and the not different mark of recording portion physical property, the recording method and device of record data (information) in view of the above.
Background technology
Rewritable CD such as DVD-RAM has the phase change recording film that is arranged on the substrate.If this phase change recording film is subjected to having the irradiation of the laser of high-energy-density, then the temperature part of illuminated portion reaches the temperature above fusing point, fusing.The CD of irradiation that is subjected to laser is with high speed rotating, so the beam spot of laser is along track high-speed mobile on phase change recording film.Therefore, in the phase change recording film since the part of passing through to melt of beam spot natural cooling at once solidify.By regulating the power of laser at this moment, the melt portions quench cooled of phase change recording film becomes noncrystal.In phase change recording film, become non-crystal zone performance refractive index and the light reflectivity different with other zone (crystalline region).The amorphous tagma that forms like this is called " mark ".Zone between " mark " and " mark " is called " (space) at interval " in addition, in orbit.
By arranging such mark and interval in orbit, can be at the CD identifying recording layer.To the weak laser that irradiation on the CD is used to reproduce, if measure this intensity of reflected light, just data in view of the above, can be reproduced in energy certification mark and border (marker edge) at interval.The power of the laser that is used to reproduce remains on and does not melt the low-level of phase change recording film.
About these disk mediums, the rate of information throughput when improving data recording/reproducing improves call wire density, or improves the sweep velocity of the beam spot on the disk medium.
In order to improve call wire density, dwindle mark lengths and gap length, or shorten the variation scale of mark lengths and gap length, shorten the time width that is used for the certification mark marginal position.
, if improve call wire density, the S/N of reproducing signal is than just descending, so do not wish that significantly call wire density rises.
In order on CD, to form micro mark with high precision, adopt Continuous irradiation by one or more laser pulses, on recording film, form the strategy of writing of each mark.
Open first conventional art of putting down in writing in the flat 5-298737 communique according to the spy,, distribute the spike train of laser about having a plurality of marks of different length.According to the mark lengths that will form, the spike train of the laser that decision should be shone in order to form each mark is promptly represented the waveform (wave recording) of the Strength Changes of laser.According to the length of record symbol row be controlled at each mark form during in the number and the amplitude of pulse of irradiation.
Wave recording in during described mark forms is divided into two parts such as beginning portion and further part.The pulse height of each pulse is generally different.In addition, beyond during pulse shaping during in, configuration space produces the record satellite pulse.
Open the technology of flat 5-298737 communique according to the spy, can not be subjected to the influence of gap length, compensation from the mark of going ahead of the rest to after the thermal diffusion in forward position of mark, can be with High Accuracy Control mark width and marker edge position.
Open in second conventional art that flat 8-7277 communique describes the spy, each record symbol is decomposed into a plurality of fundamentals of different length, make each key element corresponding with a recording impulse.Then, each record symbol is formed as each the independently a series of record mark based on each recording impulse.
Open in the 3rd conventional art of flat 9-134525 communique description the spy, in the multiple-pulse recording mode that constitutes by the heating pulse of beginning, follow-up a plurality of rear portions heating pulse, rear portion cooling pulse and last cooling pulse, describe when the mark lengths that writes down for any one party of the even length of recording channel and clock period and odd length, make the roughly identical method of pulse width of rear portion heating pulse and rear portion cooling pulse with recording channel and clock period.
Open in the 4th conventional art of flat 11-175976 communique the spy, description is according to the mark lengths in the record symbol row, injection energy and umber of pulse in during changing this mark and forming, thus the interval of any 2 change points of the injection energy between the unit in during forming for the mark of random length mark is than 1/2 times of detection window width also long method.
In described first conventional art, a recording impulse is corresponding with the prolongation of the mark lengths of detection window width.Therefore, when the detection window width shortens, be necessary that to write down energy generation source than fast in the past high-speed driving be semiconductor laser diode.For example use general (1, when 7) modulation system will realize being equivalent to the colored synchronous driving speed of 10MBytes/sec of disk set, the detection window width of reproducing signal becomes about 8.3ns (nanosecond), therefore, the shortest record current pulse width becomes about 4.2ns of about 1/2 of detection window width., need about number ns, be difficult to produce correct recording laser pulse in the rising of semiconductor laser.In addition, promptly enable to produce correct recording laser pulse, to phase change disk like that according to the medium of the formation of the cooling velocity control mark of heating part, when carrying out the multiple-pulse record, when heating part does not fully cool off, just shine next light pulse, thus normal mark form become impossible.For example, same when using the colored synchronous driving speed that (1,7) modulation system will realize 10MBytes/sec, become about 4.2ns of the record current pulse width that equals the shortest the cool time of recording medium, so, can't correctly form mark according to the characteristic of recording medium.
In described second conventional art, description is decomposed into each record symbol a plurality of fundamentals of different length, make each key element corresponding with a recording impulse, each record symbol as the method that forms based on the independently a series of record marks of the difference of each recording impulse., in the prior art, do not consider the thermal equilibrium between the recording impulse corresponding, when call wire density rises, in the control of marker edge position, have problems with each key element.In the time of promptly will forming the mark corresponding with record symbol, begin portion and record symbol rearward end at record symbol, the memory space difference of the heat of recording film is so according to the position, the record mark width variation can't carry out correct edge record.
In described the 3rd conventional art, in wave recording, insert situation near the central authorities during existing mark to form than the also short a lot of pulse of detection window width, near the pulse width this changes significantly than other parts.In the explanation of this conventional art, when carrying out marker edge when record, if the marginal position of mark is correct, with regard to the big problem of change of the signal frame degree that can not become the mark middle body., detect the average level of reproducing signal, when determining the record reproducing device of record-playback condition, the distortion of such reproducing signal brings harmful effect to the action of device.For example when phase change recording medium, same with phase place umbilicate type recording medium, can be with the change detection signal of reflectivity.Therefore, in phase change recording medium, advantage with easy and the public transcriber of phase place umbilicate type recording medium, but in from the reproducing signal of phase place umbilicate type recording medium, there is not described distortion, so based on the difficulty that becomes with the reproduction of identical device with phase place umbilicate type recording medium.
In addition, in described the 4th conventional art, the recording power level of recording impulse row is by stepped change, so need complicated power control.In addition, when the signal of symbol lengths of record 4Tw, use the power level also higher luminous at least than the average power level of 3Tw length, become densification, when forming micro marks, it is long that irradiation time becomes, so there is the shortcoming that can't form required record mark.
According to described each conventional art, when high transmission speed, can not form mark with enough precision, as a result of, can't realize enough record surface density and reliability.
Summary of the invention
The present invention proposes in view of the described fact, and its purpose is to provide: even also can form the data record method and the data recording equipment of mark with high precision when transmitting at a high speed.
Data record method of the present invention is by the energy beam irradiation recording medium with pulse type, mark and at interval the marginal position information of data as a plurality of length is recorded on the described recording medium, comprise: the step (A) that generates the record symbol row according to the data that should write down; According to the symbol lengths of each symbol in the record symbol row, the step (B) of the wave recording of the power modulation of the described energy beam of decision regulation; According to described wave recording, modulate the step (C) of the power of described energy beam; When described step (B) is n (n is the integer more than 1) at the shortest symbol lengths of described record symbol row, for being during the corresponding record mark of the symbol of n, n+1 or n+2 forms with symbol lengths x, the assignment record pulse is 1 a wave recording, for being that assignment record pulse (Pw) was a plurality of wave recording during the corresponding record mark of symbol more than the n+3 formed with symbol lengths x.
In first-selected embodiment, when described step (B) is n (n is the integer more than 1) when the shortest symbol lengths of described record symbol row, symbol lengths is divided into n, n+1, n+2, above at least four of n+3, symbol lengths m that the number of the recording impulse (Pw) that comprises in the wave recording in during forming about described record mark equates and the symbol of symbol lengths m+1, be during any K the recording impulse that comprises in during the record mark of symbol lengths m forms " the recording impulse width of symbol lengths m ", when being " the recording impulse width of symbol lengths m+1 " during any K the recording impulse that comprises in during the record mark of symbol lengths m+1 forms, the decision wave recording, thus the relation of (the recording impulse width of recording impulse Kuan Du ≦ symbol lengths m+1 of symbol lengths m) is set up.
In first-selected embodiment, the number of the recording impulse (Pw) that comprises in the wave recording in during described step (B) forms about described record mark, symbol lengths m that number is equal to each other during the end power level (Pb) that is clipped by 2 recording impulses (Pw) and the symbol of symbol lengths m+1, at the bottom of comprise in during the record mark of symbol lengths m forms any K power level (Pb) during be " pulse width of symbol lengths m ", at the bottom of comprise in during the record mark of symbol lengths m+1 forms any K power level (Pb) during when being " pulse width of symbol lengths m+1 ", the decision wave recording, thus the relation of (Mai of symbol lengths m is towards the pulse width of Kuan Du ≦ symbol lengths m+1) is set up.
In the embodiment of first-selection, be that wave recording in during the corresponding record mark of symbol more than the n+3 forms comprises and equals (x-1) recording impulse divided by 2 merchant with symbol lengths x.
In the embodiment of first-selection, with symbol lengths x be the wave recording in during the corresponding record mark of symbol more than the n+3 forms cancellation power level (Pe) during be set at more than the 1Tw.
In the embodiment of first-selection, be set at more than the 1Tw during the end power level (Pb) during the record mark in during each record mark forms forms.
In the embodiment of first-selection, be set at more than the 1Tw during the cooling power level (Pc) of the wave recording in during each record mark forms.
In the embodiment of first-selection, according to symbol lengths x, carry out corresponding record mark form during in wave recording in the moving of terminal location of the starting position of the beginning pulse that comprises and cooling pulse.
In the embodiment of first-selection, described move according to symbol lengths x be n, n+1, n+2, at least 4 intervals more than the n+3, be set at different sizes.
Data recording equipment of the present invention is by the energy beam irradiation recording medium with pulse type, mark and at interval the marginal position information of data as a plurality of length is recorded on the described recording medium, comprise: the Laser Drive parts that carry out the power modulation of described energy beam; Is the data conversion that record in the described recording medium addressable part of record symbol row; According to the symbol lengths of each symbol that comprises in the described record symbol row, the mark lengths classification element of the wave recording of the power modulation of the described energy beam of decision regulation; When described mark lengths classification element is n (n is the integer more than 1) at the shortest symbol lengths of described record symbol row, for being during the corresponding record mark of the symbol of n, n+1 or n+2 forms with symbol lengths x, the assignment record pulse is 1 a wave recording, for being that assignment record pulse (Pw) was a plurality of wave recording during the corresponding record mark of symbol more than the n+3 formed with symbol lengths x.
In first-selected embodiment, the number of the recording impulse (Pw) that comprises in the wave recording in during forming about described record mark, symbol lengths m that number is equal to each other during the end power level (Pb) that is clipped by 2 recording impulses (Pw) and the symbol of symbol lengths m+1, at the bottom of comprise in during the record mark of symbol lengths m forms any K power level (Pb) during be " pulse width of symbol lengths m ", at the bottom of comprise in during the record mark of symbol lengths m+1 forms any K power level (Pb) during when being " pulse width of symbol lengths m+1 ", the decision wave recording, thus the relation of (Mai of symbol lengths m is towards the pulse width of Kuan Du ≦ symbol lengths m+1) is set up.
In first-selected embodiment, when the shortest symbol lengths of described record symbol row is n (n is the integer more than 1), symbol lengths x is divided into n, n+1, n+2, above at least 4 of n+3, symbol lengths m that the number of the recording impulse (Pw) that comprises in the wave recording in during forming about record mark equates and the symbol of symbol lengths m+1, be during any K the recording impulse that comprises in during the record mark of symbol lengths m forms " the recording impulse width of symbol lengths m ", when being " the recording impulse width of symbol lengths m+1 " during any K the recording impulse that comprises in during the record mark of symbol lengths m+1 forms, the decision wave recording, thus the relation of (the recording impulse width of recording impulse Kuan Du ≦ symbol lengths m+1 of symbol lengths m) is set up.
In first-selected embodiment, the number of the recording impulse (Pw) that comprises in the wave recording in during forming about described record mark, symbol lengths m that number is equal to each other during the end power level (Pb) that is clipped by 2 recording impulses (Pw) and the symbol of symbol lengths m+1, at the bottom of comprise in during the record mark of symbol lengths m forms any K power level (Pb) during be " pulse width of symbol lengths m ", at the bottom of comprise in during the record mark of symbol lengths m+1 forms any K power level (Pb) during when being " pulse width of symbol lengths m+1 ", the decision wave recording, thus the relation of (Mai of symbol lengths m is towards the pulse width of Kuan Du ≦ symbol lengths m+1) is set up.
In the embodiment of first-selection, be that wave recording in during the corresponding record mark of symbol more than the n+3 forms comprises and equals (x-1) recording impulse divided by 2 merchant with symbol lengths x.
In the embodiment of first-selection, determine described wave recording, thereby the decline of the basic waveform of the laser pulse in during mark forms and the full interval of rising become more than the detection window width (Tw).
In the embodiment of first-selection, have: according to symbol lengths x, carry out corresponding record mark form during in wave recording in the pulse moving-member that moves of terminal location of the starting position of the beginning pulse that comprises and cooling pulse.
In the embodiment of first-selection, have: according to symbol lengths x be n, n+1, n+2, at least 4 intervals more than the n+3, the described record compensating unit that is set at different sizes that moves.
Other data record methods of the present invention are by the energy beam irradiation recording medium with pulse type, mark and at interval the marginal position information of data as a plurality of length is recorded on the described recording medium, comprise: the step (A) that generates the record symbol row according to the data that should write down; According to the symbol lengths of each symbol in the record symbol row, the step (B) of the wave recording of the power modulation of the described energy beam of decision regulation; According to described wave recording, modulate the step (C) of the power of described energy beam; The number of the recording impulse (Pw) that comprises in the wave recording in during described step (B) forms the pairing record mark of symbol lengths n and symbol lengths n+1 is set at 1, and below the width of the width setup of the recording impulse (Pw) that comprises in the wave recording in during the record mark corresponding with symbol lengths n forms for the recording impulse (Pw) that comprises in the wave recording in during forming with the corresponding record mark of symbol lengths n+1, the number of the recording impulse (Pw) that comprises in the wave recording in during the pairing record mark of symbol lengths n+2 and symbol lengths n+3 formed is set at 2, and below the width of the width setup of first recording impulse (Pw) that comprises in the wave recording in during the record mark corresponding with symbol lengths n+2 forms for first recording impulse (Pw) that comprises in the wave recording in during forming with the corresponding record mark of symbol lengths n+3, and the record mark corresponding with symbol lengths n+2 form during in wave recording in below the width of width setup for second recording impulse (Pw) that comprises in the wave recording in during forming with the corresponding record mark of symbol lengths n+3 of second recording impulse (Pw) that comprises.
Other data record methods of the present invention are by the energy beam irradiation recording medium with pulse type, mark and at interval the marginal position information of data as a plurality of length is recorded on the described recording medium, comprise: the step (A) that generates the record symbol row according to the data that should write down; According to the symbol lengths of each symbol in the record symbol row, the step (B) of the wave recording of the power modulation of the described energy beam of decision regulation; According to described wave recording, modulate the step (C) of the power of described energy beam; When described step (B) is n (n is the integer more than 1) at the shortest symbol lengths of described record symbol row, x is divided into n symbol lengths, n+1, n+2, above at least 4 of n+3, symbol lengths m that the number of the recording impulse (Pw) that comprises in the wave recording in during forming about described record mark equates and the symbol of symbol lengths m+1, be during any K the recording impulse that comprises in during the record mark of symbol lengths m forms " the recording impulse width of symbol lengths m ", when being " the recording impulse width of symbol lengths m+1 " during any K the recording impulse that comprises in during the record mark of symbol lengths m+1 forms, the decision wave recording, thus the relation of (the recording impulse width of recording impulse Kuan Du ≦ symbol lengths m+1 of symbol lengths m) is set up.
Other data record methods of the present invention are by the energy beam irradiation recording medium with pulse type, mark and at interval the marginal position information of data as a plurality of length is recorded on the described recording medium, comprise: the step (A) that generates the record symbol row according to the data that should write down; According to the symbol lengths of each symbol in the record symbol row, the step (B) of the wave recording of the power modulation of the described energy beam of decision regulation; According to described wave recording, modulate the step (C) of the power of described energy beam; The number of the recording impulse (Pw) that comprises in the wave recording in during described step (B) forms about described record mark, symbol lengths m that number is equal to each other during the end power level (Pb) that is clipped by 2 recording impulses (Pw) and the symbol of symbol lengths m+1, at the bottom of comprise in during the record mark of symbol lengths m forms any K power level (Pb) during be " pulse width of symbol lengths m ", at the bottom of comprise in during the record mark of symbol lengths m+1 forms any K power level (Pb) during when being " pulse width of symbol lengths m+1 ", the decision wave recording, thus the relation of (Mai of symbol lengths m is towards the pulse width of Kuan Du ≦ symbol lengths m+1) is set up.
Other data recording equipments of the present invention are by the energy beam irradiation recording medium with pulse type, mark and at interval the marginal position information of data as a plurality of length is recorded on the described recording medium, comprise: the Laser Drive parts that carry out the power modulation of described energy beam; Is the data conversion that record in the described recording medium addressable part of record symbol row; According to the symbol lengths of each symbol that comprises in the described record symbol row, the mark lengths classification element of the wave recording of the power modulation of the described energy beam of decision regulation; The number of the recording impulse (Pw) that comprises in the wave recording in during described mark lengths classification element forms the pairing record mark of symbol lengths n and symbol lengths n+1 is set at 1, and below the width of the width setup of the recording impulse (Pw) that comprises in the wave recording in during the record mark corresponding with symbol lengths n forms for the recording impulse (Pw) that comprises in the wave recording in during forming with the corresponding record mark of symbol lengths n+1, the number of the recording impulse (Pw) that comprises in the wave recording in during the pairing record mark of symbol lengths n+2 and symbol lengths n+3 formed is set at 2, and below the width of the width setup of first recording impulse (Pw) that comprises in the wave recording in during the record mark corresponding with symbol lengths n+2 forms for first recording impulse (Pw) that comprises in the wave recording in during forming with the corresponding record mark of symbol lengths n+3, and the record mark corresponding with symbol lengths n+2 form during in wave recording in below the width of width setup for second recording impulse (Pw) that comprises in the wave recording in during forming with the corresponding record mark of symbol lengths n+3 of second recording impulse (Pw) that comprises.
Other data recording equipments of the present invention are by the energy beam irradiation recording medium with pulse type, mark and at interval the marginal position information of data as a plurality of length is recorded on the described recording medium, comprise: the Laser Drive parts that carry out the power modulation of described energy beam; Is the data conversion that record in the described recording medium addressable part of record symbol row; According to the symbol lengths of each symbol that comprises in the described record symbol row, the mark lengths classification element of the wave recording of the power modulation of the described energy beam of decision regulation; When described mark lengths classification element is n (n is the integer more than 1) at the shortest symbol lengths of described record symbol row, x is divided into n symbol lengths, n+1, n+2, above at least 4 of n+3, symbol lengths m that the number of the recording impulse (Pw) that comprises in the wave recording in during forming about described record mark equates and the symbol of symbol lengths m+1, be during any K the recording impulse that comprises in during the record mark of symbol lengths m forms " the recording impulse width of symbol lengths m ", when being " the recording impulse width of symbol lengths m+1 " during any K the recording impulse that comprises in during the record mark of symbol lengths m+1 forms, the decision wave recording, thus the relation of (the recording impulse width of recording impulse Kuan Du ≦ symbol lengths m+1 of symbol lengths m) is set up.
Other data recording equipments of the present invention are by the energy beam irradiation recording medium with pulse type, mark and at interval the marginal position information of data as a plurality of length is recorded on the described recording medium, comprise: the Laser Drive parts that carry out the power modulation of described energy beam; Is the data conversion that record in the described recording medium addressable part of record symbol row; According to the symbol lengths of each symbol that comprises in the described record symbol row, the mark lengths classification element of the wave recording of the power modulation of the described energy beam of decision regulation; The number of the recording impulse (Pw) that comprises in the wave recording in during described mark lengths classification element forms about described record mark, symbol lengths m that number is equal to each other during the end power level (Pb) that is clipped by 2 recording impulses (Pw) and the symbol of symbol lengths m+1, at the bottom of comprise in during the record mark of symbol lengths m forms any K power level (Pb) during be " pulse width of symbol lengths m ", at the bottom of comprise in during the record mark of symbol lengths m+1 forms any K power level (Pb) during when being " pulse width of symbol lengths m+1 ", the decision wave recording, thus the relation of (Mai of symbol lengths m is towards the pulse width of Kuan Du ≦ symbol lengths m+1) is set up.
Other data recording equipments of the present invention are by the energy beam irradiation recording medium with pulse type, mark and at interval the marginal position information of data as a plurality of length is recorded on the described recording medium, comprise: the step (A) that generates the record symbol row according to the data that should write down; According to the symbol lengths of each symbol in the record symbol row, the step (B) of the wave recording of the power modulation of the described energy beam of decision regulation; According to described wave recording, modulate the step (C) of the power of described energy beam; Symbol lengths m that the number of the recording impulse (Pw) that comprises in the wave recording in during forming about described record mark equates and the symbol of symbol lengths m+1, be during any K the recording impulse that comprises in during the record mark of symbol lengths m forms " the recording impulse width of symbol lengths m ", when being " the recording impulse width of symbol lengths m+1 " during any K the recording impulse that comprises in during the record mark of symbol lengths m+1 forms, the decision wave recording, thus the relation of (the recording impulse width of recording impulse Kuan Du ≦ symbol lengths m+1 of symbol lengths m) is set up.
Other data recording equipments of the present invention are by the energy beam irradiation recording medium with pulse type, mark and at interval the marginal position information of data as a plurality of length is recorded on the described recording medium, comprise: the step (A) that generates the record symbol row according to the data that should write down; According to the symbol lengths of each symbol in the record symbol row, the step (B) of the wave recording of the power modulation of the described energy beam of decision regulation; According to described wave recording, modulate the step (C) of the power of described energy beam; The number of the recording impulse (Pw) that comprises in the wave recording in during forming about described record mark, symbol lengths m that number is equal to each other during the end power level (Pb) that is clipped by 2 recording impulses (Pw) and the symbol of symbol lengths m+1, at the bottom of comprise in during the record mark of symbol lengths m forms any K power level (Pb) during be " pulse width of symbol lengths m ", at the bottom of comprise in during the record mark of symbol lengths m+1 forms any K power level (Pb) during when being " pulse width of symbol lengths m+1 ", the decision wave recording, thus the relation of (Mai of symbol lengths m is towards the pulse width of Kuan Du ≦ symbol lengths m+1) is set up.
Description of drawings
Following brief description accompanying drawing.
Fig. 1 is the figure of all structures of expression data recording equipment of the present invention.
Fig. 2 is the figure of the structure of explanation recording processing system shown in Figure 1.
Fig. 3 (a)～(h) is the figure that is used to illustrate based on the action of the recording processing system of the present invention and conventional art.
Fig. 4 (a)～(j) is the figure of the wave recording that adopts among the embodiment 1 of expression data recording equipment of the present invention.
Fig. 5 (a)～(i) is the figure of wave recording of recording processing system of the data recording equipment (comparative example) of expression conventional art.
Fig. 6 (a)～(j) is the figure of the wave recording that adopts among the embodiment 2 of expression data recording equipment of the present invention.
Fig. 7 (a)～(j) is the figure of the wave recording that adopts among the embodiment 3 of expression data recording equipment of the present invention.
Fig. 8 is the figure of the example of explanation ecad mark compensation of the present invention.
Fig. 9 is the figure of the example of explanation ecad mark compensation of the present invention.
Figure 10 is the figure of structure that represents the recording processing system of data recording equipment in the past.
Figure 11 (a)～(j) is the figure of the wave recording that adopts among the embodiment 4 of expression data recording equipment of the present invention.
Figure 12 (a)～(j) is the figure of the wave recording that adopts among the embodiment 5 of expression data recording equipment of the present invention.
Figure 13 (a) and (b) expression be used to form 2 kinds of wave recordings of 4Tw length mark, Figure 13 (c) and (d) be the figure of the shape of the mark of pattern ground expression formation respectively.
Embodiment
Writing in the strategy of in the past optical disc apparatus, as mentioned above, for the shape that makes mark does not enlarge at terminal part, so increase multipulse number.
The present inventor finds with the high-speed record data time, replaces increasing multipulse number, increases pulse width, can keep the shape of mark rightly, expects the present invention.From now on,, become high level,, be necessary further to improve the frequency of operation of the semiconductor laser that the light source as data recording equipment uses more the writing in the strategy in the past of multipulse number if data transfer rate surpasses 72Mbps., be difficult to further improve the frequency of operation of semiconductor laser.
And in first-selected embodiment of the present invention, as described later, the relatively shorter mark about symbol lengths 2～4Tw because be with 1 pulse recording data, need not further improve the characteristic of semiconductor laser.In addition, the shape of the mark of formation is appropriate, so read error does not increase.
Below, with reference to accompanying drawing, embodiments of the invention are described.
[embodiment 1]
The embodiment 1 of data recording equipment of the present invention at first, is described.
In the present embodiment, as recording medium, use the CD of inversion of phases, but the recording medium that can use among the present invention is not limited to such CD.For example, if by injecting light such as magnetic energy, electron beam energy in addition, the local recording medium that forms " mark " different with other part physical propertys of energy, just suitable use in the present invention.
Feature of the present invention is, when the recording medium identifying recording layer, and can be with the write strategy of High Accuracy Control to the level of the energy (record energy) of recording medium irradiation.Here, the level of energy " record " mean stride detection window width (the variation unit of mark and marginal position at interval) about 1/2 during the averaged energy levels of laser instrument.When in order to suppress certain reasons such as laser noise, and when overlap ratio is equivalent to the also high a lot of frequency content of the frequency in cycle of detection window width in wave recording, mean stride the effect that can ignore this frequency content above during averaged energy levels.
At first, with reference to Fig. 1.Fig. 1 represents all structures of the first-selected embodiment of data recording equipment of the present invention.The device of present embodiment has optical pick-up, recording processing system, reproduction processes system as shown in Figure 1.
Optical pick-up has: the laser instrument 110 of emission laser 123; The collimation lens 109 of laser 123 parallelizations; Semi-transparent semi-reflecting lens 108; Laser 123 is converged to object lens 116 on the CD 117; Converge catoptrical detection lens 106 from CD 117; The photodetector 100 of detection of reflected light; The prime amplifier 101 of the output of photodetector 100 amplification.
The laser instrument 110 of present embodiment is that the NA of object lens 116 is 0.85 with the semiconductor laser of wavelength 405nm vibration.In Fig. 1, only represent a kind of laser instrument 110, the optical system corresponding, but an optical pick-up can have the light source module of outgoing different wavelength of laser, the optical system corresponding with it with it.
Recording processing system shown in Figure 1 has: the scrambler 113 that record data 127 is transformed to record symbol row (NRZI) 126; Generate the wave recording generation circuit 112 of level generation signal 125 according to record symbol row (NRZI) 126; Pulse walking circuit 115 according to level generation signal 125 production burst generation signals 130; Drive circuit for laser 111 according to pulse generating signal 130 output laser drive currents 124.From 119 pairs of scramblers 113 of reference generator and wave recording generation circuit 112 input reference time signals 128.Signal 128 frequency reference time of present embodiment is 72MHz, detection window width Tw=7.58ns.The recording processing system also has power setting device 114 and record compensator 118.
Reproduction processes system shown in Figure 1 has: receive from the reproducing signal 120 of prime amplifier 101 outputs of optical pick-up, carry out the waveform equalizer 103 that wave shape equalization is handled; Reproducing signal is transformed to the binaryzation device 104 of binaryzation reproducing signal; 121 decodings of binaryzation reproducing signal, generate the code translator 105 that reproduces data 122.
The following describes the action of the data recording equipment of Fig. 1.
The scrambler 113 of recording processing system receives the record data 127 that record on the CD 117, these record data 127 be transformed to CD 117 on corresponding record symbol row (NRZI) 126 in marker spacing that form.Wave recording generation circuit 112 receiving record symbol ranks 126 are transformed to the level generation signal 125 corresponding with wave recording.Scrambler 113 and wave recording generation circuit 112 with reference time, generator 119 produced reference time signal 128 synchronous working.
Drive circuit for laser 111 produces laser drive current 124 according to pulse generating signal 130.In these laser drive current 124 injection lasers 110, drive laser 110.Laser instrument 110 is according to given wave recording emission laser 123.The power level of laser 123 changes according to wave recording.
Converge on the CD 117 by collimation lens 109, semi-transparent semi-reflecting lens 108, object lens 116 from laser instrument 110 emitted laser 123.Laser 123 spot heating of the pulse type that converges are with the phase change recording film on the CD 117 of high speed rotating, along the track formation mark and the interval of CD 117.At this moment, if separate short interval, the laser 123 irradiation phase change recording films of pulse type, then the melt portions of phase change recording film connects, and forms a long mark.As mentioned above, the power level of laser 123 exists with ... wave recording, thus if appropriate controlling recording waveform, just could be by long mark of a plurality of pulse shapings.
On reproducing CD 117 during the data of record, the flag column that scans on the CDs 117 with the lower powered laser 123 of the degree of not destroying the mark that forms on (fusing) phase change recording film.Reflected light from CD 117 incides detection lens 106 by object lens 116, semi-transparent semi-reflecting lens 108.
Converge on the photodetector 100 by detecting lens 106 by CD 117 laser light reflected.Photodetector 100 is transformed to electric signal to incident light according to the light distribution of sensitive surface merchant's laser.This electric signal is by after being arranged on prime amplifier 101 in the photodetector 100 and amplifying, generate with CD 117 on scanning position mark have or not corresponding reproducing signal 120.
Reproducing signal 120 is subjected to wave shape equalization by waveform equalizer 103 and handles, and is transformed to binaryzation reproducing signal 121 at binaryzation device 104.105 pairs of binaryzation reproducing signals of code translator 121 carry out the inverse transformation of scrambler 113, generate to reproduce data 122.
CD 117 can be can recorded information record surface be any one of the single-layered disk of individual layer and 2 layers of dish that record surface that can recorded information is 2 layers.In addition, except the disk medium of the rewriting type that uses phase-change recording material, can also be the disk medium that 1 time of can only carry out appending for 1 time can be write type.
Coded system also can be 17PP modulation, 8-16 modulation except (1,7) modulation.During the 8-16 modulation, the shortest symbol lengths becomes 3T, but at this moment, can be at the present embodiment that uses (1,7) modulation symbol lengths have been added 1 example.
Further describe the structure example of recording processing system shown in Figure 1 below with reference to Fig. 2.
According to the record compensation tabular value of record compensator 118, the waveform of the pulse type of compensation level generation signal 125 sends to drive circuit for laser 111 as pulse generating signal 130 on time shaft.Signal 208 takes place in Pc generation signal 206, Pb generation signal 207, the Pe that pulse generating signal 130 comprises the power level of expression regulation wave recording, signal 209 takes place Pw.Drive circuit for laser 111 is according to pulse generating signal 130 drive laser 110.
Record symbol row below with reference to Fig. 3 (a)～(h) explanation present embodiment.It should be noted that, sometimes because reason arbitrarily, with reference to the recording figure forming or the symbol lengths lamp of front and back, length or level during the part of fine setting wave recording.In the explanation of following wave recording, when carrying out such record compensation, the wave recording before relatively finely tuning.Therefore, in the explanation of following wave recording, sufficiently long distance is striden in the front and back that are illustrated in the mark of formation, when recording figure forming is identical.Here, " sufficiently long distance " mean than since stride detection window width degree during the injection of record energy and a lot of distance of distance on the affected medium
Fig. 3 (a) expression becomes the signal 128 reference time of the time reference of operation of recording." Tw " is 1 cycle of clock.
The result's of NRZI conversion record symbol row 126 are carried out record data by scrambler 113 in Fig. 3 (b) expression.The signal waveform of expression record symbol row 126 shifts between the level of the level of " 1 " and " 0 ".The detection window width equals Tw, is the least unit of the variable quantity of the mark lengths of record symbol row 126 and gap length.
The mark and the flat shape at interval of physical record on Fig. 3 (c) pattern ground expression CD.For the record of data,,, form the row of the mark shown in Fig. 3 (c) in Fig. 3 (c) Yi Bian the beam spot at the laser that forms on the CD is moved from left to right Yi Bian make power level change.The corresponding formation of level of " 1 " in the mark 301 shown in Fig. 3 (c) and the record symbol row 126.The level of the length of mark 301 and record symbol row 126 be " 1 " during proportional.
Fig. 3 (d) represents count signal 205.From mark 301 and at interval time of beginning of 302 beginning with the timing of Tw unit.
Fig. 3 (e) is the figure that is used for comparison, the mark lengths category signal 307 of expression device in the past.In this device in the past, when mark lengths is categorized as odd-multiple length and even-multiple length.
The wave recording 303 of the device in the past that the record symbol row 126 of Fig. 3 (f) expression and Fig. 3 (b) are corresponding.Generate wave recording 303 with reference to count signal 205, record symbol row 126, mark lengths category signal 307.
The mark lengths category signal 204 of Fig. 3 (g) expression present embodiment.In the present embodiment, mark lengths is separated into symbol lengths (3T), the symbol lengths (4T) of the 3rd weak point, the 4th short following symbol lengths of the shortest symbol lengths (2T), second weak point, about the 4th short following symbol lengths, be categorized as the symbol lengths of odd-multiple and the symbol lengths of even-multiple.
The wave recording 304 of the present embodiment that the record symbol row 126 of Fig. 3 (h) expression and Fig. 3 (b) are corresponding.Generate this wave recording 304 with reference to count signal 205, record symbol row 126, mark lengths category signal 204.
Below, describe the signal waveform that is used for mark formation of the present invention in detail with reference to Fig. 2 and Fig. 4 (a)～(j).Fig. 4 (a)～(j) represents wave recording 400～407 respectively.
In addition, in the present embodiment, the coded system of scrambler 113 (Fig. 3) is after (1,7) coded modulation, carries out NRZI modulation, so mark lengths, gap length one are decided to be below the above 8Tw of 2Tw., as synchronizing signal, when inserting signals such as 9Tw consciously, also can adapt to., this fact is not limited the coding rule of scrambler 113, can use the present invention to the scrambler 113 with coding rule (for example 8-16) modulation arbitrarily.
The mark lengths sorter 201 of present embodiment at first the symbol lengths n of the mark that should form difference for 2T, 3T, 4T or 5T with last etc. 4.Then when symbol lengths n be 5T when above, carry out division (calculation of remainder) for (n-1) based on divisor 2, obtain the merchant.Mark lengths sorter 201 is serve as a mark length category signal output of this merchant.For example if symbol length n is 5, and the merchant based on divisor 2 (5-1)=4 is 2.In addition, if symbol length n is 6, and the merchant based on divisor 2 (6-1)=5 also is 2.Therefore, about the mark of 5Tw and 6Tw length, all export identical mark lengths category signal.
According to such mark lengths category signal, can identification record during the even-multiple length of mark/be spaced apart detection window width Tw of symbol rank and during odd-multiple length.In the present embodiment, for simplicity, divisor is set at 2, but can uses other divisors more than 3.In addition, the mark lengths sorter 201 of present embodiment is according to the calculation action of remainder, but the present invention is not limited thereto.
Below with reference to Fig. 4 (a)～(j).
The waveform of Fig. 4 (a) expression signal reference time 128.The count signal 205 that Fig. 4 (b) expression is produced by counter 200.Start the time of beginning by detection window width Tw timing from mark.It is corresponding with mark or beginning at interval that count signal is transferred to 0 timing.Signal waveform when Fig. 4 (c)～(j) expression forms the mark of 2Tw length～9Tw length.
It should be noted that " mark form during " of this instructions is defined as from the lifting position of beginning pulse during the down position of final pulse shown in Fig. 4 (j).
Wave recording during mark when forming the 2Tw length mark forms shown in Fig. 4 (c), by below the above 1Tw of length 0.5Tw, the pulse of horizontal Pw constitutes.
Wave recording during mark when forming the 3Tw length mark forms shown in Fig. 4 (d), by below the above 2Tw of length 1Tw, the pulse of horizontal Pw constitutes.Long 0.5Tw during forming than the mark of 2Tw length during mark forms.
Wave recording during mark when forming the 4Tw length mark forms shown in Fig. 4 (e), by below the above 2.5Tw of length 1.5Tw, the pulse of horizontal Pw constitutes.Long 0.5Tw during forming than the mark of 3Tw length during mark forms.
In data recording equipments in the past such as DVD player or register, the mark of 4Tw length shown in Figure 13 (a), during mark forms in, form according to the wave recording that comprises 2 recording impulses (Pw).The wavelength of recording impulse is about 650nm in DVD.In such device,, just shown in Figure 13 (c), produce the problem of the width of mark in terminal part expansion if form the 4Tw length mark with the recording impulse (Pw) shown in Figure 13 (b)., in the present embodiment, promptly use a recording impulse shown in Figure 13 (b) also can be shown in Figure 13 (d) like that repeatability form the mark of suitable shape well.
It should be noted that, as follow-on CD, exploitation Blue-ray Disc (BD).But, in BD, the Wavelength of Laser of using in the recoding/reproduction as 400nm about.In addition, the material of the recording layer among the BD and form also with DVD in recording layer material and form different.In addition, between BD and DVD, on physical arrangement, there are a lot of differences.In BD, compare with DVD, be necessary to make the width of recording impulse and interval narrower, so if data transfer rate improves, even then use the recording impulse of the waveform shown in Figure 13 (a), the shape of 4Tw length mark also might be out of shape than DVD.And when forming the 4Tw length mark, in BD, also can obtain the mark of desirable shape with 1 recording impulse shown in Figure 13 (b).
Wave recording during mark when forming the 5Tw length mark forms shown in Fig. 4 (f), after the pulse of length 1Tw, horizontal Pw then length 1Tw, horizontal Pe during, length 1Tw, horizontal Pw during.
Wave recording during mark when forming the 6Tw length mark forms shown in Fig. 4 (g), after the pulse of length 1Tw, horizontal Pw then length 2Tw, horizontal Pe during, length 1Tw, horizontal Pw during.
Form 7Tw and 9Tw length mark (more than the symbol lengths 5Tw, and the wave recording during the mark in the time of the odd length mark of detection window width Tw) forms is shown in Fig. 4 (h) and 4 (i), respectively the central authorities of mark formation portion as shown in the figure like that length 1Tw, the horizontal Pe of additional marking length 2Tw during, length 1Tw, horizontal Pw during.
Form the 8Tw length mark (more than the symbol lengths 5Tw, and the wave recording during the mark in the time of the even length mark of detection window width Tw) forms is shown in Fig. 4 (i), respectively the central authorities of mark formation portion as shown in the figure like that length 1Tw, the horizontal Pe of additional marking length 2Tw during, length 1Tw, horizontal Pw during.
It should be noted that the signal waveform in during the non-formation of mark during next mark forms, is kept the Pe level not according to gap length.In the present embodiment, 305 the shortest Pe level (the shortest cooling period) was set at 1Tw during mark formed.
If according to the influence of the ascending velocity/decline rate that adopts the above present embodiment of writing strategy, just can obtain the light output that is not subjected to semiconductor laser component, the energy repeatability forms the effect of suitable mark well.For example when data transfer rate was 72Mbps, Tw became 7.6ns.At this moment, because 0.5Tw=3.8ns so if the ascending velocity and the decline rate of the output of the light of semiconductor laser component are 2ns, then can't reach the level of peak power and end power, can't form required mark shape.And if adopt the strategy of writing of present embodiment, even the ascending velocity and the decline rate of the output of the light of semiconductor laser component are not brought up to more than the present level, also can in wave recording, realize the modulation of the laser power of loyalty.
In addition, in the present embodiment, symbol lengths m that the number of the recording impulse (Pw) that comprises in the wave recording in during forming about record mark equates and the symbol of symbol lengths m+1, be during any K the recording impulse that comprises in during the record mark of symbol lengths m forms " the recording impulse width of symbol lengths m ", when being " the recording impulse width of symbol lengths m+1 " during any K the recording impulse that comprises in during the record mark of symbol lengths m+1 forms, the decision wave recording, thus (relation of the recording impulse width) of symbol lengths m ≦ (the recording impulse width of symbol lengths m+1) is set up.
In view of the above, can obtain that to make mark shape be the effect of suitable shape.
In the present embodiment, each symbol lengths x be the wave recording during the pairing record mark of the above symbol of n+3 forms cancellation power level (Pe) during be set at more than the 1Tw.In view of the above, even the ascending velocity and the decline rate of the output of the light of semiconductor laser component are about 2ns, also can carry out the modulation of laser instrument, so can obtain the effect that repeatability forms mark well with required recording power.
[embodiment 2]
The embodiment 2 of data record method of the present invention is described below with reference to Fig. 6.
Only pass through the operation program of the data recording equipment of change embodiment 1, just can carry out the data record method of present embodiment.Therefore, the structure of the data recording equipment of present embodiment has and Fig. 1 and the identical in fact structure of structure shown in Figure 2, does not repeat detailed explanation.
With reference to Fig. 6 (a)～(j), the wave recording 600～607 of expression present embodiment.
By Fig. 6 (a)～(j) and Fig. 4 (a)～(j) are compared, as can be known, the signal waveform 600～607 that adopts in the present embodiment is similar with the signal waveform 400～407 of Fig. 4.Shown in Fig. 6 (c)～(e), signal waveform 600～602 is identical with signal waveform 400～402.The difference of embodiment 1 and embodiment 2 is that symbol lengths n is the form of the above signal waveform of 5Tw.
With reference to Fig. 6 (f).Wave recording is after the pulse of 1Tw, horizontal Pw during the formation of 5Tw length mark, then length 1Tw, horizontal Pb during, length 1Tw, horizontal Pw during.Here, it should be noted, by 2 pulses clip during in horizontal Pb also lower than horizontal Pe.
Wave recording is shown in Fig. 6 (g) during the formation of 6Tw length mark, and 305 after the pulse of 1Tw, horizontal Pw during mark formed, then length 2Tw, horizontal Pb during, length 1Tw, horizontal Pw during.
More than the symbol lengths 5Tw, and the wave recording during the odd-multiple length mark of detection window width Tw is as Fig. 6 (h) with (j), the central authorities of mark formation portion as shown in the figure like that the length 1Tw level of additional marking length 2Tw, Pb during, length 1Tw, horizontal Pw during.
More than the symbol lengths 5Tw, and the wave recording during the even-multiple length mark of detection window width Tw is shown in Fig. 6 (i), the central authorities of mark formation portion as shown in the figure like that length 1Tw, the horizontal Pb of additional marking length 2Tw during, length 1Tw, horizontal Pw during.
According to present embodiment, the number of the recording impulse (Pw) that comprises in the wave recording in during forming about record mark, symbol lengths m that number is equal to each other during the end power level (Pb) that is clipped by 2 recording impulses (Pw) and the symbol of symbol lengths m+1, at the bottom of comprise in during the record mark of symbol lengths m forms any K power level (Pb) during be " pulse width of symbol lengths m ", at the bottom of comprise in during the record mark of symbol lengths m+1 forms any K power level (Pb) during when being " pulse width of symbol lengths m+1 ", the decision wave recording, thus the relation of (Mai of symbol lengths m is towards the pulse width of Kuan Du ≦ symbol lengths m+1) is set up.Symbol lengths is short more, is easy to generate the savings of heat approximately in marked terminal portion, but according to and the relation of (Mai of symbol lengths m is towards the pulse width of Kuan Du ≦ symbol lengths m+1) can obtain the savings that relaxes heat, adjust the effect of the shape of mark.
In the present embodiment, being set at more than the 1Tw during the end power level (Pb) of the wave recording during each record mark formation.In view of the above,, also can carry out the modulation of laser instrument, so can obtain the effect that the energy repeatability forms mark well with required recording power even the rising and the decline rate of the output of the light of semiconductor laser component are 2ns.
[embodiment 3]
Below, with reference to Fig. 7, the embodiment 3 of data record method of the present invention is described.
Only pass through the operation program of the data recording equipment of change embodiment 1, just can carry out the data record method of present embodiment.Therefore, the structure of the data recording equipment of present embodiment has and Fig. 1 and the identical in fact structure of structure shown in Figure 2, does not repeat detailed explanation.
With reference to Fig. 7 (a)～(j), the wave recording 700～707 of expression present embodiment.
By Fig. 7 (a)～(j) and Fig. 6 (a)～(j) are compared, as can be known, the signal waveform 700～707 that adopts in the present embodiment is similar with the signal waveform 600～607 of Fig. 6.The difference of embodiment 2 and embodiment 3 is: place below the above 1.5Tw of length 1Tw beginning during the non-formation of mark, horizontal Pc during, keep the Pe level before then during next mark forms.In the present embodiment, this horizontal Pc is set at different power levels with horizontal Pb, but horizontal Pc and horizontal Pb can be set at equal.
[embodiment 4]
Below, with reference to Figure 11, the embodiment 4 of data record method of the present invention is described.
Only pass through the operation program of the data recording equipment of change embodiment 1, just can carry out the data record method of present embodiment.Therefore, the structure of the data recording equipment of present embodiment has and Fig. 1 and the identical in fact structure of structure shown in Figure 2, does not repeat detailed explanation.
With reference to Figure 11 (a)～(j), the wave recording 1100～1107 of expression present embodiment.
By Figure 11 (c)～(j) and Fig. 4 (c)～(j) are compared, as can be known, the signal waveform 1100,1101,1103～1107 that adopts in the present embodiment is identical with the signal waveform 400,401,403～407 of Fig. 4.The point of feature is shown in Figure 11 (e) in the present embodiment, the wave recording when forming the 4Tw length mark after the pulse of 0.5Tw, horizontal Pw, then length 1Tw, horizontal Pe during, length 0.5Tw, horizontal Pw during.Then, kept the Pe level before during next mark forms.
Figure 11 (b1) is the count signal 205 that is produced by counter 200, with the time timing of detection window width Tw to beginning from the mark beginning.It is corresponding with mark or beginning at interval that count signal is transferred to 0 timing.
Figure 11 (b2) is the sub-count signal 210 that is produced by counter 200, and for reference signal, phase place becomes 180 °.Count signal is transferred to 0 timing postpones 180 ° at interval from mark or beginning phase place.
Shown in Figure 11 (e), the pulse width of Pw is 0.5Tw, but so long as the above width of 0.5Tw get final product.Here, any or both sides and the sub-count signal of the starting end of each pulse and terminal are synchronous.
In the present embodiment, the rising part and the sub-count signal 210 of the sloping portion of the 1st pulse in the signal waveform 1102 of 4Tw length and the 2nd pulse are synchronous.
[embodiment 5]
Below with reference to Figure 12, the embodiment 5 of data record method of the present invention is described.
Only pass through the operation program of the data recording equipment of change embodiment 1, just can carry out the data record method of present embodiment.Therefore, the structure of the data recording equipment of present embodiment has and Fig. 1 and the identical in fact structure of structure shown in Figure 2, does not repeat detailed explanation.
With reference to Figure 12 (a)～(j), the wave recording 1200～1207 of expression present embodiment.
The waveform of Figure 12 (a) expression signal reference time.Figure 12 (b1) is the count signal 205 that is produced by counter 200, with the time timing of detection window width Tw to beginning from the mark beginning.It is corresponding with mark or beginning at interval that count signal is transferred to 0 timing.Figure 12 (b2) is the sub-count signal 210 that is produced by counter 200, and for reference signal, phase place becomes 180 °.Count signal is transferred to 0 timing postpones 180 ° at interval from mark or beginning phase place.
Wave recording when forming the 2Tw length mark is made of the pulse of length 1Tw, horizontal Pw shown in Figure 12 (c).During the non-formation of mark begin to place length 1Tw, horizontal Pc during, keep the Pe level before then during next mark forms.
Wave recording when forming the 3Tw length mark is made of the pulse of length 2Tw, horizontal Pw shown in Figure 12 (d).During the non-formation of mark begin to place length 1Tw, horizontal Pc during, keep the Pe level before then during next mark forms., during forming than the mark of 2Tw during mark forms more than the long 0.5Tw.
Wave recording when forming the 4Tw length mark shown in Figure 12 (e), after the pulse of length 1Tw, horizontal Pw, then length 1Tw, horizontal Pb during, length 1Tw, horizontal Pw during.During beginning placement length 1Tw, horizontal Pc, before during next mark formation, keep the Pe level then during the non-formation of mark.
During the even-multiple length mark of detection window width Tw, shown in Figure 12 (g), (i), the central authorities of mark formation portion as shown in the figure like that length 1Tw, the horizontal Pb of additional marking length 2Tw during, length 1Tw, horizontal Pw during.During beginning placement length 1Tw, horizontal Pc, before during next mark formation, keep the Pe level then during the non-formation of mark.
Wave recording when forming the 5Tw length mark shown in Figure 12 (f), after the pulse of length 1Tw, horizontal Pw, then length 2Tw, horizontal Pb during, length 1Tw, horizontal Pw during.During beginning placement length 1Tw, horizontal Pc, before during next mark formation, keep the Pe level then during the non-formation of mark.
Wave recording when forming the 7Tw length mark shown in Figure 12 (h), after the pulse of length 1Tw, horizontal Pw, then length 1.5Tw, horizontal Pb during, length 1Tw, horizontal Pw during, length 1.5Tw, horizontal Pb during.During beginning placement length 1Tw, horizontal Pc, before during next mark formation, keep the Pe level then during the non-formation of mark.
Here, any one party of the starting end of intermediate pulse and terminal or both sides and sub-count signal are synchronous.In the drawings, the rising part of the 2nd pulse and sloping portion and sub-count signal are synchronous.
Below, shown in Figure 12 (j), when the odd-multiple length mark of detection window width Tw, the central authorities of mark formation portion as shown in the figure like that length 1Tw, the horizontal Pb of additional marking length 2Tw during, length 1Tw, horizontal Pw during.During beginning placement length 1Tw, horizontal Pc, before during next mark formation, keep the Pe level then during the non-formation of mark.
In present embodiment several, the Pe level is identical power level with Pb, Pc level, but can make Pe level and Pb, Pc level different.
The example of ecad mark compensation is described with reference to the accompanying drawings.In high-density optic recording, take place according to record condition, the record that marker edge moves is interfered.In order to prevent the deterioration of the tracer signal that it causes, can carry out the compensation of ecad mark.
Ecad mark compensation is to the above mark (of 2T mark (2Tm), 3T mark (3Tm), 4T mark (4Tm), 5T ≧ 5Tm), make the irradiation starting position of laser and the compensating movement of pulse width variation as shown in Figure 8.
One example of the ecad mark compensation when Fig. 8 represents that recording power is two-value.Symbol lengths according to record mark, move by making dTtop and Ttop mark starting end position in the described parameter, the record mark terminal location moves by making Tlp and dTlp, can suppress the starting end of mark and the edge of terminal and move, and obtains the good signal quality.
One example of the ecad mark compensation when Fig. 9 represents that recording power is 4 values.According to the symbol lengths of record mark, move by making dTtop and Ttop the mark starting end position in the described parameter, and the record mark terminal location moves by making dTe, can suppress the starting end of mark and the edge of terminal and move, and obtains the good signal quality.Here, recording power is 4 values, but Pb=Pc when being 3 values, also can use identical mark compensation.
It should be noted that, the amount of movement that produces by record compensation use lag line can with from reference time small amount of movement for example Tw/16 move as unit.
In addition, write down when compensation, can be according to basic waveform, from beginning compensation with the count signal synchronization position, also can be from beginning compensation with sub-count signal synchronization position.
Here, in basic waveform, the width of the end power level in during each pulse width, mark form and the width of cooling power are more than the 1T, but after carrying out described record compensation, each pulse width of each mark lengths is at least more than the 0.5Tw.At this moment, be difficult to be subjected to the influence of the response speed of laser instrument, can relax record condition.
[comparative example]
Pattern below with reference to the wave recording 500～506 of the device of Fig. 5 (a)～(i) explanation comparative example.
With reference to Figure 10.Figure 10 is the figure of structure of the recording processing system of this device of expression.
Scrambler 1013 receiving record data 1027 among Figure 10 are transformed to record symbol row 1026.Mark lengths sorter 1001 carries out the division based on divisor 2 (calculation of remainder) for symbol lengths n according to record symbol row 1025.The mark of this mark lengths category signal 1001 identification record symbol rank when the even-multiple length of detection window width Tw and during odd-multiple length/at interval.
Counter 1000 usefulness detection window width Tw units produce count signal instant from the time of mark beginning beginning.Fig. 5 (b) represents count signal 1005.It is corresponding with mark or beginning at interval that count signal is transferred to 0 timing.
To counter 1000 and scrambler 1013 input reference time signals 1028.Count signal 1005 input wave recording tables 1002.Wave recording table 1002 pair drive circuit for laser 1011 transmission level generation signals, drive circuit for laser 1011 output laser drive currents 1024.
Wave recording when Fig. 5 (c) expression forms the 2Tw length mark.305 pulses by length 1Tw, horizontal Pw1 constituted during mark formed.During the non-formation of mark begin to place length 1Tw, horizontal Pb during, keep the Pa level before then during next mark forms.
Wave recording when Fig. 5 (d) expression forms the 3Tw length mark.305 after the pulse of length 1Tw, the horizontal Pw1 identical with Fig. 5 (c) during mark formed, then length 1Tw, horizontal Pw2 during.Same during the non-formation of mark with the wave recording shown in Fig. 5 (c), begin to place length 1Tw, horizontal Pb during, keep the Pa level before then during next mark forms.About the waveform during the non-formation of mark, the waveform shown in later Fig. 5 (e)～(f) too.Be during the non-formation of mark not according to gap length, begin to place length 1Tw, horizontal Pb during, keep the Pa level before then during next mark forms.305 the shortest cooling period became 1Tw during mark formed.
Wave recording when Fig. 5 (e) expression forms the 4Tw length mark.305 after the pulse of length 1Tw, the horizontal Pw1 identical with Fig. 5 (c) during mark formed, then length 1Tw, horizontal Pa during, length 1Tw, horizontal Pw3 during.
Fig. 5 (f) and (h) wave recording when expression forms 5Tw mark lengths and 7Tw mark lengths respectively.When the odd-multiple length mark of detection window width Tw, during length 1Tw, the horizontal Pa of the rear end of mark formation portion additional marking length 2Tw, length 1Tw, horizontal Pw3 during.During the non-formation of mark not according to gap length, begin to place length 1Tw, horizontal Pb during, during next mark forms, keep the Pa level then.
Fig. 5 (g) and (i) wave recording when expression forms 6Tw mark lengths and 8Tw mark lengths respectively.When the even-multiple length mark of detection window width Tw, during length 1Tw, the horizontal Pa of the rear end of mark formation portion additional marking length 2Tw, length 1Tw, horizontal Pw3 during.
In comparative example, to compare with the embodiment of the invention, the recording power of recording impulse example is by step-like change, so the control of complicated power necessitates.In addition, when the mark of record mark length 4Tw, be necessary at least to use the power level also higher to make semiconductor Laser device luminous in the 3Tw length than average power level.When the recording density rising of CD, when requiring to form micro mark, in comparative example, it is long that irradiation time can't become, so there is the shortcoming that can't obtain required mark shape.
According to the present invention, recording medium is being injected energy, form and the different mark of recording portion physical property not, in view of the above, in the data recording equipment of record data, can form mark well with the high speed precision.In view of the above, as recording mode, can use the marker edge recording mode favourable to high call wire densityization.
According to more than, high speed, highly reliableization of seeking recoding/reproduction action can realize the miniaturization of information record carrier and recording medium simultaneously, so favourable aspect cost.
Claims (2)
1. data record method is by the energy beam irradiation recording medium with pulse type, and data are recorded data record method on the described recording medium as the mark of a plurality of length and marginal position information at interval, comprises:
Generate the steps A of record symbol row according to the data that will write down;
According to the symbol lengths of each symbol in the record symbol row, the step B of the wave recording of the power modulation of the described energy beam of decision regulation; And
According to described wave recording, modulate the step C of the power of described energy beam;
Described step B is n at the shortest symbol lengths of described record symbol row, when wherein n is a integer more than 1, for being during the corresponding record mark of the symbol of n, n+1 forms with symbol lengths x, the assignment record pulse is 1 a wave recording, for being during the corresponding record mark of symbol more than the n+3 forms with symbol lengths x, assignment record pulse (Pw) is a plurality of wave recording
Described step B, the number of the recording impulse (Pw) that comprises in the wave recording in during forming for described record mark, and the end power level (Pb) that clips by 2 recording impulses (Pw) during the symbol lengths m that are equal to each other of number and the symbol of symbol lengths m+1, at the bottom of comprise in during if the record mark of symbol lengths m forms any K power level (Pb) during be " pulse width of symbol lengths m ", at the bottom of comprise in during if the record mark of symbol lengths m+1 forms any K power level (Pb) during during for " pulse width of symbol lengths m+1 ", the decision wave recording satisfies following the relation:
(the pulse width) of symbol lengths m ≦ (pulse width of symbol lengths m+1),
Described record symbol is listed as by the coded system of 17PP modulation and is encoded.
2. data reproducing method records mark on the described recording medium by reading by the described data record method of claim 1, reproduces data.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003101248 | 2003-04-04 | ||
| JP2003101248 | 2003-04-04 | ||
| JP2003-101248 | 2003-04-04 | ||
| JP2003-279108 | 2003-07-24 | ||
| JP2003279108 | 2003-07-24 | ||
| JP2003279108 | 2003-07-24 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800092722A Division CN100397495C (en) | 2003-04-04 | 2004-03-25 | Recording medium data recording method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101393751A true CN101393751A (en) | 2009-03-25 |
| CN101393751B CN101393751B (en) | 2013-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810097002.1A Expired - Fee Related CN101299336B (en) | 2003-04-04 | 2004-03-25 | Data recording method and data reproducing method |
| CN2008100970040A Expired - Fee Related CN101299338B (en) | 2003-04-04 | 2004-03-25 | Data recording method and data reproducing method |
| CNA2008100970036A Pending CN101299337A (en) | 2003-04-04 | 2004-03-25 | Data recording method and data reproducing method |
| CNA2008100970017A Pending CN101299335A (en) | 2003-04-04 | 2004-03-25 | Data recording method and data reproducing method |
| CNB2004800092722A Expired - Fee Related CN100397495C (en) | 2003-04-04 | 2004-03-25 | Recording medium data recording method and device |
| CN2008100888008A Expired - Fee Related CN101393751B (en) | 2003-04-04 | 2004-03-25 | Data recording method and data reproducing method |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200810097002.1A Expired - Fee Related CN101299336B (en) | 2003-04-04 | 2004-03-25 | Data recording method and data reproducing method |
| CN2008100970040A Expired - Fee Related CN101299338B (en) | 2003-04-04 | 2004-03-25 | Data recording method and data reproducing method |
| CNA2008100970036A Pending CN101299337A (en) | 2003-04-04 | 2004-03-25 | Data recording method and data reproducing method |
| CNA2008100970017A Pending CN101299335A (en) | 2003-04-04 | 2004-03-25 | Data recording method and data reproducing method |
| CNB2004800092722A Expired - Fee Related CN100397495C (en) | 2003-04-04 | 2004-03-25 | Recording medium data recording method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6975914B2 (en) * | 2018-03-09 | 2021-12-01 | パナソニックＩｐマネジメント株式会社 | Optical disc recording method, optical disc device and integrated circuit |
| CN116233247B (en) * | 2023-04-25 | 2023-07-21 | 合肥智鼎科技服务有限公司 | Data transmission processing system with preprocessing performance |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09134525A (en) * | 1995-11-08 | 1997-05-20 | Ricoh Co Ltd | Information-recording method |
| JPH1083573A (en) * | 1997-05-19 | 1998-03-31 | Yamaha Corp | Optical disk recording carrier |
| JPH11175976A (en) * | 1997-12-09 | 1999-07-02 | Hitachi Ltd | Information recording device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3138610B2 (en) * | 1995-04-13 | 2001-02-26 | 株式会社リコー | Recording method for phase change optical disk |
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2004
- 2004-03-25 CN CN200810097002.1A patent/CN101299336B/en not_active Expired - Fee Related
- 2004-03-25 CN CN2008100970040A patent/CN101299338B/en not_active Expired - Fee Related
- 2004-03-25 CN CNA2008100970036A patent/CN101299337A/en active Pending
- 2004-03-25 CN CNA2008100970017A patent/CN101299335A/en active Pending
- 2004-03-25 CN CNB2004800092722A patent/CN100397495C/en not_active Expired - Fee Related
- 2004-03-25 CN CN2008100888008A patent/CN101393751B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09134525A (en) * | 1995-11-08 | 1997-05-20 | Ricoh Co Ltd | Information-recording method |
| JPH1083573A (en) * | 1997-05-19 | 1998-03-31 | Yamaha Corp | Optical disk recording carrier |
| JPH11175976A (en) * | 1997-12-09 | 1999-07-02 | Hitachi Ltd | Information recording device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101393751B (en) | 2013-03-27 |
| CN1771538A (en) | 2006-05-10 |
| CN101299337A (en) | 2008-11-05 |
| CN101299338B (en) | 2012-08-29 |
| CN101299335A (en) | 2008-11-05 |
| CN101299338A (en) | 2008-11-05 |
| CN101299336A (en) | 2008-11-05 |
| CN101299336B (en) | 2014-04-30 |
| CN100397495C (en) | 2008-06-25 |
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