CN101299336B - Data recording method and data reproducing method - Google Patents
Data recording method and data reproducing method Download PDFInfo
- Publication number
- CN101299336B CN101299336B CN200810097002.1A CN200810097002A CN101299336B CN 101299336 B CN101299336 B CN 101299336B CN 200810097002 A CN200810097002 A CN 200810097002A CN 101299336 B CN101299336 B CN 101299336B
- Authority
- CN
- China
- Prior art keywords
- recording
- mark
- during
- record
- symbol
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
A data recording method according to the present invention is a method for recording data as edge position information, including marks and spaces of multiple different lengths, on a storage medium by irradiating the storage medium with a pulsed energy beam. The method includes the steps of: (A) generating a write code sequence based on the data to be recorded; (B) determining a write pulse waveform, defining the power modulation of the energy beam, according to the code lengths of respective codes included in the write code sequence; and (C) modulating the power of the energy beam based on the write pulse waveform.; 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.
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 of recording medium and device).
Technical field
The present invention relates to recording medium irradiating lasers such as CDs, form and the mark that recording unit physical property is not different, the accordingly recording method and device of record data (information).
Background technology
The rewritable CD such as DVD-RAM has the phase change recording film being arranged on substrate.If this phase change recording film is subject to having the irradiation of the laser of high-energy-density, the temperature part of illuminated portion reaches the temperature over fusing point, fusing.Be subject to the CD of irradiation of laser with High Rotation Speed, so the beam spot of laser is along track high-speed mobile on phase change recording film.Therefore, the part of passing through to melt due to beam spot in phase change recording film is naturally cooling at once, solidifies.By regulating the power of laser at this moment, the melt portions of phase change recording film is cooling rapidly, becomes noncrystal.In phase change recording film, become non-crystal region performance refractive index and the light reflectivity different from other region (crystalline region).The amorphous tagma forming is like this called to " mark ".In addition the region between " mark " and " mark " is called " interval (space) ", in orbit.
By arranging in orbit such mark and interval, can be at data recording on optical disc.To irradiating the weak laser for reproducing on CD, if measure this intensity of reflected light, with regard to the border (marker edge) at energy certification mark and interval, accordingly, can rendering data.For the power of the laser that reproduces, remain on and do 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 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 for detection of marker edge position.
, if improve call wire density, the S/N of reproducing signal is than just declining, so do not wish that significantly call wire density rises.
In order to form small mark with high precision on CD, adopt by the Continuous irradiation of one or more laser pulses, on recording film, form the strategy of writing of each mark.
According to the first conventional art of recording in Unexamined Patent 5-298737 communique, about thering are a plurality of marks of different length, distribute the spike train of laser.According to the mark lengths that will form, the spike train of the laser that decision should be irradiated in order to form each mark represents the waveform (wave recording) of the Strength Changes of laser.Number and the amplitude of the pulse of irradiating in during being controlled at each mark and forming according to the length of record symbol row.
Wave recording in during described mark forms is divided into two parts such as start portion and further part.The pulse height of each pulse is generally different.In addition, beyond during pulse shaping during in, configuration space, produces and records satellite pulse.
According to the technology of Unexamined Patent 5-298737 communique, can not be subject to the impact of gap length, compensation from mark in advance to after the thermal diffusion in forward position of mark, can be with high precision control mark width and marker edge position.
In the second conventional art of describing at Unexamined Patent 8-7277 communique, each record symbol is decomposed into a plurality of fundamentals of different length, makes each key element corresponding with a recording impulse.Then, using each record symbol as based on each recording impulse each independently a series of marks that record form.
In the 3rd conventional art of describing at Unexamined Patent 9-134525 communique, in the multiple-pulse recording mode forming at the heating pulse by starting, follow-up a plurality of rear portions heating pulse, rear portion cooling pulse and last cooling pulse, describe when record for the even length of recording channel and clock period and any one party of odd length mark lengths time, the pulse width that makes rear portion heating pulse and rear portion cooling pulse is the method identical with recording channel and clock period roughly.
In the 4th conventional art of Unexamined Patent 11-175976 communique, description is according to the mark lengths in record symbol row, Implantation Energy and umber of pulse in during changing this mark and forming, thus the interval of any 2 change points of the Implantation Energy between the unit in during forming for the mark of random length mark is than 1/2 times of detection window width long method also.
In described the first conventional art, a recording impulse is corresponding with the prolongation of the mark lengths of detection window width.Therefore,, when detection window width shortens, be necessary that with the high-speed driving than in the past fast, recording energy generation source is semiconductor laser diode.For example use general (1,7) when modulation system will realize the colored synchronous driving speed of the 10MBytes/sec that is equivalent to disk set, the detection window width of reproducing signal becomes about 8.3ns (nanosecond), therefore, the shortest record current pulse width becomes approximately 1/2 approximately 4.2ns of detection window width., in the rising of semiconductor laser, need to count ns left and right, be difficult to produce correct recording laser pulse.In addition, enable to produce correct recording laser pulse, to phase change disk like that according to the media of the formation of the cooling velocity control mark of heating part, carry out multiple-pulse while recording, just irradiate next light pulse when cooling heating part is inabundant, thus normal mark form become impossible.For example, when same use (1,7) modulation system will realize the colored synchronous driving speed of 10MBytes/sec, become the approximately 4.2ns of the record current pulse width that equals the shortest the cool time of recording medium, so according to the characteristic of recording medium, cannot correctly form mark.
In described the 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, using each record symbol as recording based on the independently a series of respectively of each recording impulse the methods that mark forms., in the prior art, do not consider the thermal equilibrium between the recording impulse corresponding with each key element, when call wire density rises, in the control of marker edge position, have problems.In the time of will forming the mark corresponding with record symbol, in record symbol start portion and record symbol rearward end, the hot memory space of recording film is different, so according to position, record mark width change, cannot carry out correct edge record.
In described the 3rd conventional art, near the central authorities during existing mark to form, in wave recording, to insert than the detection window width situation of short a lot of pulse also, near other parts of pulse width ratio this significantly change.In the explanation of this conventional art, when carrying out marker edge while recording, if the marginal position of mark is correct, just can not become the large problem of change of the signal frame degree of mark middle body., detect the average level of reproducing signal, while 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 by the change detection signal of reflectivity.Therefore, in phase change recording medium, there is easy and the public transcriber of phase place umbilicate type recording medium, but in the reproducing signal from phase place umbilicate type recording medium, there is not described distortion, thus based on the difficulty of phase place umbilicate type recording medium with the reproduction change of identical device.
In addition,, in described the 4th conventional art, the recording power level of recording impulse row is by stepped change, so need complicated power to control.In addition,, when recording the signal of symbol lengths of 4Tw, at least use that also high power level is luminous than the average power level of 3Tw length, become densification, while forming micro marks, it is long that irradiation time becomes, so exist, cannot form the required shortcoming that records mark.
According to described each conventional art, when high transmission speed, can not form mark with enough precision, as a result of, cannot realize enough recording areal densities and reliability.
Summary of the invention
The present invention proposes in view of the described fact, and its object is to provide: even also can form with high precision data record method and the data recording equipment of mark when transmitting at a high speed.
Data record method of the present invention irradiates recording medium by the energy beam with pulse type, the marginal position information recording at the mark using data as a plurality of length and interval, on described recording medium, comprises: the step (A) that generates record symbol row according to the data that should record; According to the symbol lengths of each symbol in 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; Described step (B) is when the shortest symbol lengths of described record symbol row is n (n is more than 1 integer), for with symbol lengths x be the symbol of n, n+1 or n+2 corresponding record mark and form during, assignment record pulse is the wave recording of 1, for with symbol lengths x be more than n+3 symbol corresponding record mark and form during, assignment record pulse (Pw) is a plurality of wave recording.
In first-selected embodiment, described step (B) is when the shortest symbol lengths of described record symbol row is n (n is more than 1 integer), symbol lengths is divided into n, n+1, n+2, more than n+3 at least four, about described record mark and form during in wave recording in the equal symbol lengths m of the number of the recording impulse (Pw) that comprises and the symbol of symbol lengths m+1, during any K the recording impulse comprising in during the recording mark and form of symbol lengths m, be " the recording impulse width of symbol lengths m ", while being " the recording impulse width of symbol lengths m+1 " during any K the recording impulse comprising in during the recording mark and form of symbol lengths m+1, determine wave recording, the relation of (thereby the recording impulse width of recording impulse width≤symbol lengths m+1 of symbol lengths m) is set up.
In first-selected embodiment, described step (B) about described record mark and form during in wave recording in the number of the recording impulse (Pw) that comprises, the symbol lengths m that during the end power level (Pb) being clipped by 2 recording impulses (Pw), number is equal to each other and the symbol of symbol lengths m+1, at the bottom of comprise in during the recording mark and form of symbol lengths m any K power level (Pb) during be " pulse width of symbol lengths m ", at the bottom of comprise in during the recording mark and form of symbol lengths m+1 any K power level (Pb) during while being " pulse width of symbol lengths m+1 ", determine wave recording, the relation of (thereby the pulse width of pulse width≤symbol lengths m+1 of symbol lengths m) is set up.
In first-selected embodiment, with symbol lengths x be more than n+3 symbol corresponding record mark and form during in wave recording comprise and equal (x-1) divided by 2 business's recording impulse.
In first-selected embodiment, with symbol lengths x be more than n+3 symbol corresponding record mark and form during in wave recording cancellation power level (Pe) during be set as 1Tw more than.
In first-selected embodiment, in during respectively recording mark and forming record end power level (Pb) during mark forms during be set as 1Tw more than.
In first-selected embodiment, more than being set as 1Tw during the cooling power level (Pc) of the wave recording in during respectively recording mark and forming.
In first-selected embodiment, according to symbol lengths x, carry out corresponding record mark and form during in wave recording in the starting position of beginning pulse that comprises and the movement of the terminal location of cooling pulse.
In first-selected embodiment, described movement according to symbol lengths x be n, n+1, n+2, more than n+3 at least 4 intervals, be set as different sizes.
Data recording equipment of the present invention irradiates recording medium by the energy beam with pulse type, the marginal position information recording at the mark using data as a plurality of length and interval, on described recording medium, comprises: the laser drive part part that carries out the power modulation of described energy beam; The data transformation that should be recorded in described recording medium, it is the addressable part of record symbol row; According to the symbol lengths of each symbol comprising in 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; Described mark lengths classification element is when the shortest symbol lengths of described record symbol row is n (n is more than 1 integer), for with symbol lengths x be the symbol of n, n+1 or n+2 corresponding record mark and form during, assignment record pulse is the wave recording of 1, for with symbol lengths x be more than n+3 symbol corresponding record mark and form during, assignment record pulse (Pw) is a plurality of wave recording.
In first-selected embodiment, about described record mark and form during in wave recording in the number of the recording impulse (Pw) that comprises, the symbol lengths m that during the end power level (Pb) being clipped by 2 recording impulses (Pw), number is equal to each other and the symbol of symbol lengths m+1, at the bottom of comprise in during the recording mark and form of symbol lengths m any K power level (Pb) during be " pulse width of symbol lengths m ", at the bottom of comprise in during the recording mark and form of symbol lengths m+1 any K power level (Pb) during while being " pulse width of symbol lengths m+1 ", determine wave recording, the relation of (thereby the pulse width of pulse width≤symbol lengths m+1 of symbol lengths m) is set up.
In first-selected embodiment, when the shortest symbol lengths of described record symbol row is n (n is more than 1 integer), symbol lengths x is divided into n, n+1, n+2, more than n+3 at least 4, about the equal symbol lengths m of the number of the recording impulse (Pw) that comprises in the wave recording in during recording mark and forming and the symbol of symbol lengths m+1, during any K the recording impulse comprising in during the recording mark and form of symbol lengths m, be " the recording impulse width of symbol lengths m ", while being " the recording impulse width of symbol lengths m+1 " during any K the recording impulse comprising in during the recording mark and form of symbol lengths m+1, determine wave recording, the relation of (thereby the recording impulse width of recording impulse width≤symbol lengths m+1 of symbol lengths m) is set up.
In first-selected embodiment, about described record mark and form during in wave recording in the number of the recording impulse (Pw) that comprises, the symbol lengths m that during the end power level (Pb) being clipped by 2 recording impulses (Pw), number is equal to each other and the symbol of symbol lengths m+1, at the bottom of comprise in during the recording mark and form of symbol lengths m any K power level (Pb) during be " pulse width of symbol lengths m ", at the bottom of comprise in during the recording mark and form of symbol lengths m+1 any K power level (Pb) during while being " pulse width of symbol lengths m+1 ", determine wave recording, the relation of (thereby the pulse width of pulse width≤symbol lengths m+1 of symbol lengths m) is set up.
In first-selected embodiment, with symbol lengths x be more than n+3 symbol corresponding record mark and form during in wave recording comprise and equal (x-1) divided by 2 business's recording impulse.
In first-selected embodiment, determine described wave recording, thereby mark form during in the decline of basic waveform of laser pulse and more than the full interval of rising becomes detection window width (Tw).
In first-selected embodiment, have: according to symbol lengths x, carry out corresponding record mark and form during in wave recording in the pulse moving-member of movement of the starting position of beginning pulse that comprises and the terminal location of cooling pulse.
In first-selected embodiment, have: according to symbol lengths x be n, n+1, n+2, more than n+3 at least 4 intervals, described movement is set as to the different big or small compensating units that record.
Other data record methods of the present invention irradiate recording medium by the energy beam with pulse type, the marginal position information recording at the mark using data as a plurality of length and interval, on described recording medium, comprises: the step (A) that generates record symbol row according to the data that should record; According to the symbol lengths of each symbol in 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; described step (B) symbol lengths n and symbol lengths n+1 is corresponding record mark and form during in wave recording in the number of the recording impulse (Pw) that comprises be set as 1, and corresponding with symbol lengths n record mark and form during in wave recording in the width of the recording impulse (Pw) that comprises be set as with symbol lengths n+1 corresponding record mark and form during in wave recording in below the width of the recording impulse (Pw) that comprises, symbol lengths n+2 and symbol lengths n+3 is corresponding record mark and form during in wave recording in the number of the recording impulse (Pw) that comprises be set as 2, and corresponding with symbol lengths n+2 record mark and form during in wave recording in the width of the first recording impulse (Pw) of comprising be set as with symbol lengths n+3 corresponding record mark and form during in wave recording in below the width of the first recording impulse (Pw) of comprising, and corresponding with symbol lengths n+2 record mark and form during in wave recording in the width of the second recording impulse (Pw) of comprising be set as with symbol lengths n+3 corresponding record mark and form during in wave recording in below the width of the second recording impulse (Pw) of comprising.
Other data record methods of the present invention irradiate recording medium by the energy beam with pulse type, the marginal position information recording at the mark using data as a plurality of length and interval, on described recording medium, comprises: the step (A) that generates record symbol row according to the data that should record, according to the symbol lengths of each symbol in 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, described step (B) is when the shortest symbol lengths of described record symbol row is n (n is more than 1 integer), symbol lengths x is divided into n, n+1, n+2, more than n+3 at least 4, about described record mark and form during in wave recording in the equal symbol lengths m of the number of the recording impulse (Pw) that comprises and the symbol of symbol lengths m+1, during any K the recording impulse comprising in during the recording mark and form of symbol lengths m, be " the recording impulse width of symbol lengths m ", while being " the recording impulse width of symbol lengths m+1 " during any K the recording impulse comprising in during the recording mark and form of symbol lengths m+1, determine wave recording, the relation of (thereby the recording impulse width of recording impulse width≤symbol lengths m+1 of symbol lengths m) is set up.
Other data record methods of the present invention irradiate recording medium by the energy beam with pulse type, the marginal position information recording at the mark using data as a plurality of length and interval, on described recording medium, comprises: the step (A) that generates record symbol row according to the data that should record, according to the symbol lengths of each symbol in 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, described step (B) about described record mark and form during in wave recording in the number of the recording impulse (Pw) that comprises, the symbol lengths m that during the end power level (Pb) being clipped by 2 recording impulses (Pw), number is equal to each other and the symbol of symbol lengths m+1, at the bottom of comprise in during the recording mark and form of symbol lengths m any K power level (Pb) during be " pulse width of symbol lengths m ", at the bottom of comprise in during the recording mark and form of symbol lengths m+1 any K power level (Pb) during while being " pulse width of symbol lengths m+1 ", determine wave recording, the relation of (thereby the pulse width of pulse width≤symbol lengths m+1 of symbol lengths m) is set up.
Other data recording equipments of the present invention irradiate recording medium by the energy beam with pulse type, the marginal position information recording at the mark using data as a plurality of length and interval, on described recording medium, comprises: the laser drive part part that carries out the power modulation of described energy beam; The data transformation that should be recorded in described recording medium, it is the addressable part of record symbol row; According to the symbol lengths of each symbol comprising in 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; described mark lengths classification element symbol lengths n and symbol lengths n+1 is corresponding record mark and form during in wave recording in the number of the recording impulse (Pw) that comprises be set as 1, and corresponding with symbol lengths n record mark and form during in wave recording in the width of the recording impulse (Pw) that comprises be set as with symbol lengths n+1 corresponding record mark and form during in wave recording in below the width of the recording impulse (Pw) that comprises, symbol lengths n+2 and symbol lengths n+3 is corresponding record mark and form during in wave recording in the number of the recording impulse (Pw) that comprises be set as 2, and corresponding with symbol lengths n+2 record mark and form during in wave recording in the width of the first recording impulse (Pw) of comprising be set as with symbol lengths n+3 corresponding record mark and form during in wave recording in below the width of the first recording impulse (Pw) of comprising, and corresponding with symbol lengths n+2 record mark and form during in wave recording in the width of the second recording impulse (Pw) of comprising be set as with symbol lengths n+3 corresponding record mark and form during in wave recording in below the width of the second recording impulse (Pw) of comprising.
Other data recording equipments of the present invention irradiate recording medium by the energy beam with pulse type, the marginal position information recording at the mark using data as a plurality of length and interval, on described recording medium, comprises: the laser drive part part that carries out the power modulation of described energy beam, the data transformation that should be recorded in described recording medium, it is the addressable part of record symbol row, according to the symbol lengths of each symbol comprising in 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, described mark lengths classification element is when the shortest symbol lengths of described record symbol row is n (n is more than 1 integer), symbol lengths x is divided into n, n+1, n+2, more than n+3 at least 4, about described record mark and form during in wave recording in the equal symbol lengths m of the number of the recording impulse (Pw) that comprises and the symbol of symbol lengths m+1, during any K the recording impulse comprising in during the recording mark and form of symbol lengths m, be " the recording impulse width of symbol lengths m ", while being " the recording impulse width of symbol lengths m+1 " during any K the recording impulse comprising in during the recording mark and form of symbol lengths m+1, determine wave recording, the relation of (thereby the recording impulse width of recording impulse width≤symbol lengths m+1 of symbol lengths m) is set up.
Other data recording equipments of the present invention irradiate recording medium by the energy beam with pulse type, the marginal position information recording at the mark using data as a plurality of length and interval, on described recording medium, comprises: the laser drive part part that carries out the power modulation of described energy beam, the data transformation that should be recorded in described recording medium, it is the addressable part of record symbol row, according to the symbol lengths of each symbol comprising in 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, described mark lengths classification element about described record mark and form during in wave recording in the number of the recording impulse (Pw) that comprises, the symbol lengths m that during the end power level (Pb) being clipped by 2 recording impulses (Pw), number is equal to each other and the symbol of symbol lengths m+1, at the bottom of comprise in during the recording mark and form of symbol lengths m any K power level (Pb) during be " pulse width of symbol lengths m ", at the bottom of comprise in during the recording mark and form of symbol lengths m+1 any K power level (Pb) during while being " pulse width of symbol lengths m+1 ", determine wave recording, the relation of (thereby the pulse width of pulse width≤symbol lengths m+1 of symbol lengths m) is set up.
Other data recording equipments of the present invention irradiate recording medium by the energy beam with pulse type, the marginal position information recording at the mark using data as a plurality of length and interval, on described recording medium, comprises: the step (A) that generates record symbol row according to the data that should record, according to the symbol lengths of each symbol in 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, about described record mark and form during in wave recording in the equal symbol lengths m of the number of the recording impulse (Pw) that comprises and the symbol of symbol lengths m+1, during any K the recording impulse comprising in during the recording mark and form of symbol lengths m, be " the recording impulse width of symbol lengths m ", while being " the recording impulse width of symbol lengths m+1 " during any K the recording impulse comprising in during the recording mark and form of symbol lengths m+1, determine wave recording, the relation of (thereby the recording impulse width of recording impulse width≤symbol lengths m+1 of symbol lengths m) is set up.
Other data recording equipments of the present invention irradiate recording medium by the energy beam with pulse type, the marginal position information recording at the mark using data as a plurality of length and interval, on described recording medium, comprises: the step (A) that generates record symbol row according to the data that should record, according to the symbol lengths of each symbol in 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, about described record mark and form during in wave recording in the number of the recording impulse (Pw) that comprises, the symbol lengths m that during the end power level (Pb) being clipped by 2 recording impulses (Pw), number is equal to each other and the symbol of symbol lengths m+1, at the bottom of comprise in during the recording mark and form of symbol lengths m any K power level (Pb) during be " pulse width of symbol lengths m ", at the bottom of comprise in during the recording mark and form of symbol lengths m+1 any K power level (Pb) during while being " pulse width of symbol lengths m+1 ", determine wave recording, the relation of (thereby the pulse width of pulse width≤symbol lengths m+1 of symbol lengths m) is set up.
Accompanying drawing explanation
Brief description accompanying drawing below.
Fig. 1 means the figure of all structures of data recording equipment of the present invention.
Fig. 2 is the figure of the structure of the recording processing system shown in key diagram 1.
Fig. 3 (a)～(h) is for the figure of the action of the recording processing system based on the present invention and conventional art is described.
The figure of the wave recording adopting in the embodiment 1 of Fig. 4 (a)～(j) mean data recording equipment of the present invention.
The figure of the wave recording of the recording processing system of the data recording equipment (comparative example) of Fig. 5 (a)～(i) mean conventional art.
The figure of the wave recording adopting in the embodiment 2 of Fig. 6 (a)～(j) mean data recording equipment of the present invention.
The figure of the wave recording adopting in the embodiment 3 of Fig. 7 (a)～(j) mean 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 means the figure of structure of the recording processing system of data recording equipment in the past.
The figure of the wave recording adopting in the embodiment 4 of Figure 11 (a)～(j) mean data recording equipment of the present invention.
The figure of the wave recording adopting in the embodiment 5 of Figure 12 (a)～(j) mean data recording equipment of the present invention.
Figure 13 (a) and (b) represent to be used to form 2 kinds of wave recordings of 4Tw length mark, Figure 13 (c) and (d) be the figure of shape that represents to pattern respectively the mark of formation.
Embodiment
Writing in strategy of optical disc apparatus in the past, as mentioned above, for the shape of mark is not expanded at terminal part, so increase multipulse number.
Present inventor finds when with high-speed record data, replaces increasing multipulse number, increases pulse width, can keep rightly the shape of mark, expects the present invention.From now on, if data transfer rate surpasses 72Mbps, become high level, more the writing in strategy in the past of multipulse number, be necessary further to improve the frequency of operation of the semiconductor laser that the light source as data recording equipment uses., be difficult to further improve the frequency of operation of semiconductor laser.
And in first-selected embodiment of the present invention, as described later, about the shorter mark of symbol lengths 2～4Tw, because be by 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]
First, the embodiment 1 of data recording equipment of the present invention is described.
In the present embodiment, as recording medium, use the CD of inversion of phases, but the recording medium that can use in the present invention is not limited to such CD.For example, if by injecting the light such as magnetic energy, electron beam energy in addition, the local recording medium that forms " mark " different from other part physical propertys of energy, just applicable use in the present invention.
Feature of the present invention is, when recording medium identifying recording layer, can control the strategy of writing to the level of the energy (recording energy) of recording medium irradiation with high precision.Here, " record the level of energy " and mean the averaged energy levels across the laser instrument during 1/2 left and right of detection window width (the variation unit of the marginal position at mark and interval).When in order to suppress certain reasons such as laser noise, and the frequency in cycle that overlap ratio is equivalent to detection window width in wave recording is also during high a lot of frequency content, mean across can ignore more than the effect of this frequency content during averaged energy levels.
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 the present embodiment as shown in Figure 1, has optical pick-up, recording processing system, reproduction processes system.
Optical pick-up has: the laser instrument 110 of Emission Lasers 123; The collimation lens 109 of laser 123 parallelizations; Semi-transparent semi-reflecting lens 108; Laser 123 is converged to the object lens 116 on CD 117; Converge the catoptrical detection lens 106 from CD 117; The photodetector 100 of detection of reflected light; The prime amplifier 101 that the output of photodetector 100 is amplified.
The laser instrument 110 of the 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 with it, but an optical pick-up can have the light source module of the laser of outgoing different wave length, the optical system corresponding with it.
Recording processing system shown in Fig. 1 has: the scrambler 113 that record data 127 is transformed to record symbol row (NRZI) 126; According to record symbol row (NRZI) 126, generate the wave recording circuit for generating 112 of level generation signal 125; According to the pulse walking circuit 115 of level generation signal 125 production burst generation signals 130; According to the drive circuit for laser 111 of pulse generating signal 130 output laser drive currents 124.From 119 pairs of scramblers 113 of reference generator and wave recording circuit for generating 112 input reference time signals 128.Signal 128 frequency reference time of the present embodiment is 72MHz, detection window width Tw=7.58ns.Recording processing system also has power setting device 114 and record compensator 118.
Reproduction processes system shown in Fig. 1 has: receive from the reproducing signal 120 of prime amplifier 101 outputs of optical pick-up, the waveform equalizer 103 that carries out wave shape equalization processing; Reproducing signal is transformed to the binaryzation device 104 of binaryzation reproducing signal; 121 decodings of binaryzation reproducing signal, generate the code translator 105 of rendering data 122.
The following describes the action of the data recording equipment of Fig. 1.
The scrambler 113 of recording processing system receives and be recorded to the record data 127 on CD 117, and these record data 127 are transformed to record symbol row (NRZI) 126 corresponding with the marker spacing forming on CD 117.Wave recording circuit for generating 112 receiving record symbol ranks 126, are transformed to the level generation signal 125 corresponding with wave recording.Scrambler 113 and wave recording circuit for generating 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 Lasers 123.The power level of laser 123 changes according to wave recording.
From the laser 123 of laser instrument 110 transmittings, by collimation lens 109, semi-transparent semi-reflecting lens 108, object lens 116, converge to CD 117.Laser 123 spot heating of the pulse type converging are with the phase change recording film on the CD 117 of High Rotation Speed, along track formation mark and the interval of CD 117.At this moment, if separate short interval, the laser 123 of pulse type irradiates phase change recording film, and 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, so if appropriately control wave recording, just can be by long mark of a plurality of pulse shapings.
On reproducing CD 117 during the data of record, the flag column scanning on CDs 117 not destroy the lower powered laser 123 of degree of the mark forming on (fusing) phase change recording film.Reflected light from CD 117 is incided and is detected lens 106 by object lens 116, semi-transparent semi-reflecting lens 108.
The laser being reflected by CD 117 converges on photodetector 100 by detecting lens 106.Photodetector 100, according to the light distribution of sensitive surface business's laser, is transformed to electric signal incident light.This electric signal is by after being arranged on prime amplifier in photodetector 100 101 and amplifying, generate with the mark of scanning position on CD 117 have or not corresponding reproducing signal 120.
Reproducing signal 120 is subject to wave shape equalization by waveform equalizer 103 and processes, and at binaryzation device 104, is transformed to binaryzation reproducing signal 121.105 pairs of binaryzation reproducing signals of code translator 121 carry out the inverse transformation of scrambler 113, generate rendering data 122.
CD 117 can be can recorded information the record surface single-layered disk that is individual layer and any one of record surface that can recorded information 2 layers of dish being 2 layers.In addition except using the disk medium of the rewriting type of phase-change recording material, can also be the disk medium that can only carry out 1 writable type of appending for 1 time.
Coded system, except (1,7) modulation, can be also 17PP modulation, 8-16 modulation.During 8-16 modulation, the shortest symbol lengths becomes 3T, but at this moment, can be to use the present embodiment of (1,7) modulation that symbol lengths has been added to 1 example.
Below with reference to Fig. 2, further describe the structure example of the recording processing system shown in Fig. 1.
According to the record compensation tabular value of record compensator 118, on time shaft, compensate the waveform of the pulse type of level generation signal 125, as pulse generating signal 130, send to drive circuit for laser 111.There is signal 208 in the Pc generation signal 206 that pulse generating signal 130 comprises the power level that represents regulation wave recording, Pb generation signal 207, Pe, signal 209 occurs Pw.Drive circuit for laser 111 is according to pulse generating signal 130 drive laser 110.
Below with reference to Fig. 3 (a)～(h) record symbol of explanation the present embodiment is listed as.It should be noted that, sometimes due to reason arbitrarily, with reference to recording figure forming or the symbol lengths lamp of front and back, length or level during a part for 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, be illustrated in the front and back of mark of formation across sufficiently long distance, when recording figure forming is identical.Here, " sufficiently long distance " means than the injection of recording energy due to across during detection window width degree and a lot of distance of distance on affected media
Fig. 3 (a) represents to become the signal 128 reference time of the time reference of operation of recording." Tw " is 1 cycle of clock.
Fig. 3 (b) represents by scrambler 113, record data to be carried out the record symbol row 126 of the result of NRZI conversion.The signal waveform that represents record symbol row 126 shifts between the level of " 1 " and the level of " 0 ".Detection window width equals Tw, is the least unit of the mark lengths of record symbol row 126 and the variable quantity of gap length.
Fig. 3 (c) pattern ground represents the mark of physical record and the flat shape at interval on CD.For the record of data, Yi Bian make power level change, Yi Bian the beam spot of the laser that forms is moved from left to right in Fig. 3 (c), form the row of the mark shown in Fig. 3 (c) on CD.The corresponding formation of level of the mark 301 shown in Fig. 3 (c) and " 1 " in 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.The time YiTw unit's timing starting from the beginning at mark 301 and interval 302.
Fig. 3 (e) is for figure relatively, represents the mark lengths category signal 307 of device in the past.In this device in the past, when mark lengths is categorized as to odd-multiple length and even-multiple length.
Fig. 3 (f) represents the wave recording 303 of the device in the past corresponding with the record symbol row 126 of Fig. 3 (b).With reference to count signal 205, record symbol row 126, mark lengths category signal 307, generate wave recording 303.
Fig. 3 (g) represents the mark lengths category signal 204 of the present embodiment.In the present embodiment, mark lengths is separated into the shortest symbol lengths (2T), the second short symbol lengths (3T), the 3rd short symbol lengths (4T), the 4th short following symbol lengths, about the 4th short following symbol lengths, be categorized as the symbol lengths of odd-multiple and the symbol lengths of even-multiple.
Fig. 3 (h) represents the wave recording 304 of the present embodiment corresponding with the record symbol row 126 of Fig. 3 (b).With reference to count signal 205, record symbol row 126, mark lengths category signal 204, generate this wave recording 304.
Below, with reference to Fig. 2 and Fig. 4 (a)～(j), describe the signal waveform forming for mark of the present invention in detail.Fig. 4 (a)～(j) represents respectively wave recording 400～407.
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, while inserting the signals such as 9Tw consciously, also can adapt to., this fact is not limited the coding rule of scrambler 113, for example, to having the scrambler 113 of coding rule (8-16) modulation arbitrarily, can apply the present invention.
The mark lengths sorter 201 of the present embodiment first the symbol lengths n of the mark that should form difference for 2T, 3T, 4T or 5T are with upper etc. 4.Then when symbol lengths n is 5T when above, for (n-1), carry out the division (calculation of remainder) based on divisor 2, obtain business.Mark lengths sorter 201 is serve as a mark length category signal output of this business.If for example symbol lengths n is that 5, (5-1)=4 the business based on divisor 2 is 2.In addition, if the business based on divisor 2 that symbol lengths n is 6, (6-1)=5 is also 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 as to 2, but can uses other more than 3 divisors.In addition, the mark lengths sorter 201 of the 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.Fig. 4 (b) represents the count signal 205 being produced by counter 200.The time starting from mark beginning is by detection window width Tw timing.It is corresponding with the beginning at mark or interval that count signal is transferred to 0 timing.Signal waveform when Fig. 4 (c)～(j) represents to form the mark of 2Tw length～9Tw length.
It should be noted that, " mark form during " of this instructions, as shown in Fig. 4 (j), is defined as lifting position from starting pulse to during the down position of final pulse.
Wave recording during mark while forming 2Tw length mark forms is as shown in Fig. 4 (c), and pulse following by the above 1Tw of length 0.5Tw, horizontal Pw forms.
Wave recording during mark while forming 3Tw length mark forms is as shown in Fig. 4 (d), and pulse following by the above 2Tw of length 1Tw, horizontal Pw forms.Long 0.5Tw during forming than the mark of 2Tw length during mark formation.
Wave recording during mark while forming 4Tw length mark forms is as shown in Fig. 4 (e), and pulse following by the above 2.5Tw of length 1.5Tw, horizontal Pw forms.Long 0.5Tw during forming than the mark of 3Tw length during mark formation.
In the data recording equipment in the past such as DVD player or register, the mark of 4Tw length as shown in Figure 13 (a), during mark forms in, according to the wave recording that comprises 2 recording impulses (Pw), form.The wavelength of recording impulse is 650nm left and right in DVD.In such device, if form 4Tw length mark with the recording impulse (Pw) shown in Figure 13 (b), just, as shown in Figure 13 (c), produce the width of mark in the problem of terminal part expansion., in the present embodiment, use a recording impulse shown in Figure 13 (b) also can be as shown in Figure 13 (d) repeatability form well the mark of suitable shape.
It should be noted that, as follow-on CD, exploitation Blue-ray Disc (BD).But in BD, the sharp light wavelength of using in recoding/reproduction is 400nm left and right.In addition the material of the recording layer in BD and form also from the material of recording layer in DVD and form different.In addition,, between BD and DVD, in 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 than DVD, so if data transfer rate improves, even if use the recording impulse of the waveform shown in Figure 13 (a), the shape of 4Tw length mark is likely distortion also.And while forming 4Tw length mark with 1 recording impulse shown in Figure 13 (b), in BD, also can obtain the mark of the shape of hope.
Wave recording during mark while forming 5Tw length mark forms as 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 while forming 6Tw length mark forms as 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 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 as shown in Fig. 4 (h) and 4 (i), respectively the central authorities of mark forming portion as shown in Figure additional marking length 2Tw length 1Tw, horizontal Pe during, length 1Tw, horizontal Pw during.
Form 8Tw length mark (more than 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 as shown in Fig. 4 (i), respectively the central authorities of mark forming portion as shown in Figure additional marking length 2Tw length 1Tw, horizontal Pe during, length 1Tw, horizontal Pw during.
It should be noted that, the signal waveform in during mark is non-formation is according to gap length, until during next mark forms, maintain Pe level.In the present embodiment, during mark formation, 305 the shortest Pe level (the shortest cooling period) is set as 1Tw.
If according to the impact that adopts the above tactful the present embodiment of writing, just can obtain the ascending velocity/decline rate of the light output that is not subject to semiconductor laser component, energy repeatability forms the effect of suitable mark well.For example, when data transfer rate is 72Mbps, Tw becomes 7.6ns.At this moment, because 0.5Tw=3.8ns, so the ascending velocity of the light of semiconductor laser component output and decline rate 2ns if cannot reach the level of peak power and end power, cannot form required mark shape.And if adopt the strategy of writing of the present embodiment, even more than the ascending velocity of the light of semiconductor laser component output and decline rate do not bring up to present level, also can in wave recording, realize the modulation of loyal laser power.
In addition, in the present embodiment, about the equal symbol lengths m of the number of the recording impulse (Pw) that comprises in the wave recording in during recording mark and forming and the symbol of symbol lengths m+1, during any K the recording impulse comprising in during the recording mark and form of symbol lengths m, be " the recording impulse width of symbol lengths m ", while being " the recording impulse width of symbol lengths m+1 " during any K the recording impulse comprising in during the recording mark and form of symbol lengths m+1, determine wave recording, the relation of (thereby the recording impulse width of symbol lengths m)≤(the recording impulse width of symbol lengths m+1) is set up.
Accordingly, can obtain that to make mark shape be the effect of suitable shape.
In the present embodiment, each symbol lengths x be the corresponding cancellation power level (Pe) that records the wave recording during mark forms of more than n+3 symbol during be set as 1Tw more than.Accordingly, even if the ascending velocity of the light of semiconductor laser component output and decline rate are 2ns left and right, also can carry out with required recording power the modulation of laser instrument, so can obtain the effect that repeatability forms mark well.
[embodiment 2]
The embodiment 2 of data record method of the present invention is described below with reference to Fig. 6.
Only, by changing the operation program of the data recording equipment of embodiment 1, just can carry out the data record method of the present embodiment.Therefore, the structure of the data recording equipment of the present embodiment has the structure identical in fact with the structure shown in Fig. 1 and Fig. 2, does not repeat detailed explanation.
With reference to Fig. 6 (a)～(j), represent the wave recording 600～607 of the present embodiment.
By Fig. 6 (a)～(j) with Fig. 4 (a)～(j) relatively, known, the signal waveform 600～607 adopting in the present embodiment is similar with the signal waveform 400～407 of Fig. 4.As 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 signal waveform more than 5Tw.
With reference to Fig. 6 (f).During the formation of 5Tw length mark, wave recording is after the pulse of 1Tw, horizontal Pw, then length 1Tw, horizontal Pb during, length 1Tw, horizontal Pw during.Here, it should be noted, the horizontal Pb in during being clipped by 2 pulses is also lower than horizontal Pe.
During the formation of 6Tw length mark, wave recording is as shown in Fig. 6 (g), and during mark forms, 305 after the pulse of 1Tw, horizontal Pw, then length 2Tw, horizontal Pb during, length 1Tw, horizontal Pw during.
More than symbol lengths 5Tw, and the wave recording during odd-multiple length mark of detection window width Tw is as Fig. 6 (h) with (j), the central authorities of mark forming portion as shown in Figure additional marking length 2Tw length 1Tw level, Pb during, length 1Tw, horizontal Pw during.
More than symbol lengths 5Tw, and the wave recording during even-multiple length mark of detection window width Tw is as shown in Fig. 6 (i), the central authorities of mark forming portion as shown in Figure additional marking length 2Tw length 1Tw, horizontal Pb during, length 1Tw, horizontal Pw during.
According to the present embodiment, number about the recording impulse (Pw) that comprises in the wave recording in during recording mark and forming, the symbol lengths m that during the end power level (Pb) being clipped by 2 recording impulses (Pw), number is equal to each other and the symbol of symbol lengths m+1, at the bottom of comprise in during the recording mark and form of symbol lengths m any K power level (Pb) during be " pulse width of symbol lengths m ", at the bottom of comprise in during the recording mark and form of symbol lengths m+1 any K power level (Pb) during while being " pulse width of symbol lengths m+1 ", determine wave recording, the relation of (thereby the pulse width of pulse width≤symbol lengths m+1 of symbol lengths m) is set up.Symbol lengths is shorter, in marked terminal portion, approximately easily produces hot savings, but according to and the relation of (pulse width of pulse width≤symbol lengths m+1 of symbol lengths m) can obtain and relax hot savings, adjust the effect of the shape of mark.
In the present embodiment, more than being set as 1Tw during the end power level (Pb) of the wave recording during respectively recording mark and forming.Accordingly, even if rising and the decline rate of the output of the light of semiconductor laser component are 2ns, also can carry out with required recording power the modulation of laser instrument, so can obtain the effect that energy repeatability forms mark well.
[embodiment 3]
Below, with reference to Fig. 7, the embodiment 3 of data record method of the present invention is described.
Only, by changing the operation program of the data recording equipment of embodiment 1, just can carry out the data record method of the present embodiment.Therefore, the structure of the data recording equipment of the present embodiment has the structure identical in fact with the structure shown in Fig. 1 and Fig. 2, does not repeat detailed explanation.
With reference to Fig. 7 (a)～(j), represent the wave recording 700～707 of the present embodiment.
By Fig. 7 (a)～(j) with Fig. 6 (a)～(j) relatively, known, the signal waveform 700～707 adopting in the present embodiment is similar with the signal waveform 600～607 of Fig. 6.The difference of embodiment 2 and embodiment 3 is: starting during mark is non-formation placed below the above 1.5Tw of length 1Tw, horizontal Pc during, maintain Pe level before then during next mark forms.In the present embodiment, this horizontal Pc and horizontal Pb are set as to different power levels, but horizontal Pc and horizontal Pb can be set as equating.
[embodiment 4]
Below, with reference to Figure 11, the embodiment 4 of data record method of the present invention is described.
Only, by changing the operation program of the data recording equipment of embodiment 1, just can carry out the data record method of the present embodiment.Therefore, the structure of the data recording equipment of the present embodiment has the structure identical in fact with the structure shown in Fig. 1 and Fig. 2, does not repeat detailed explanation.
With reference to Figure 11 (a)～(j), represent the wave recording 1100～1107 of the present embodiment.
By Figure 11 (c)～(j) with Fig. 4 (c)～(j) relatively, known, the signal waveform 1100,1101,1103～1107 adopting in the present embodiment is identical with the signal waveform 400,401,403～407 of Fig. 4.In the present embodiment, the point of feature is as shown in Figure 11 (e), the wave recording when forming 4Tw length mark after the pulse of 0.5Tw, horizontal Pw, then length 1Tw, horizontal Pe during, length 0.5Tw, horizontal Pw during.Then, before during next mark forms, maintain Pe level.
Figure 11 (b1) is the count signal 205 being produced by counter 200, uses detection window width Tw to the time timing starting from mark beginning.It is corresponding with the beginning at mark or interval that count signal is transferred to 0 timing.
Figure 11 (b2) is the sub-count signal 210 being produced by counter 200, and for reference signal, phase place becomes 180 °.Count signal is transferred to 0 timing and from the beginning at mark or interval, is postponed the phase place of 180 °.
As shown in Figure 11 (e), the pulse width of Pw is 0.5Tw, but so long as width more than 0.5Tw.Here, any or both sides of the starting end of each pulse and terminal are synchronizeed with sub-count signal.
In the present embodiment, the sloping portion of the 1st pulse and the rising part of the 2nd pulse in the signal waveform 1102 of 4Tw length synchronizeed with sub-count signal 210.
[embodiment 5]
Below with reference to Figure 12, the embodiment 5 of data record method of the present invention is described.
Only, by changing the operation program of the data recording equipment of embodiment 1, just can carry out the data record method of the present embodiment.Therefore, the structure of the data recording equipment of the present embodiment has the structure identical in fact with the structure shown in Fig. 1 and Fig. 2, does not repeat detailed explanation.
With reference to Figure 12 (a)～(j), represent the wave recording 1200～1207 of the present embodiment.
Figure 12 (a) represents the waveform of signal reference time.Figure 12 (b1) is the count signal 205 being produced by counter 200, uses detection window width Tw to the time timing starting from mark beginning.It is corresponding with the beginning at mark or interval that count signal is transferred to 0 timing.Figure 12 (b2) is the sub-count signal 210 being produced by counter 200, and for reference signal, phase place becomes 180 °.Count signal is transferred to 0 timing and from the beginning at mark or interval, is postponed the phase place of 180 °.
Wave recording while forming 2Tw length mark, as shown in Figure 12 (c), consists of the pulse of length 1Tw, horizontal Pw.During mark is non-formation start to place length 1Tw, horizontal Pc during, maintain Pe level before then during next mark forms.
Wave recording while forming 3Tw length mark, as shown in Figure 12 (d), consists of the pulse of length 2Tw, horizontal Pw.During mark is non-formation start to place length 1Tw, horizontal Pc during, maintain Pe level before then during next mark forms., mark during forming, than the mark of 2Tw, form during more than long 0.5Tw.
Wave recording while forming 4Tw length mark as 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 mark is non-formation, during beginning placement length 1Tw, horizontal Pc, then before during next mark formation, maintain Pe level.
During the even-multiple length mark of detection window width Tw, as shown in Figure 12 (g), (i), the central authorities of mark forming portion as shown in Figure additional marking length 2Tw length 1Tw, horizontal Pb during, length 1Tw, horizontal Pw during.During mark is non-formation, during beginning placement length 1Tw, horizontal Pc, then before during next mark formation, maintain Pe level.
Wave recording while forming 5Tw length mark as 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 mark is non-formation, during beginning placement length 1Tw, horizontal Pc, then before during next mark formation, maintain Pe level.
Wave recording while forming 7Tw length mark as 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 mark is non-formation, during beginning placement length 1Tw, horizontal Pc, then before during next mark formation, maintain Pe level.
Here, the starting end of intermediate pulse and any one party of terminal or both sides are synchronizeed with sub-count signal.In the drawings, the rising part of the 2nd pulse and sloping portion are synchronizeed with sub-count signal.
Below, as shown in Figure 12 (j), when the odd-multiple length mark of detection window width Tw, the central authorities of mark forming portion as shown in Figure additional marking length 2Tw length 1Tw, horizontal Pb during, length 1Tw, horizontal Pw during.During mark is non-formation, during beginning placement length 1Tw, horizontal Pc, then before during next mark formation, maintain Pe level.
In the present embodiment several, Pe level and Pb, Pc level are identical power 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, occur 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 as shown in Figure 8, is to 2T mark (2Tm), 3T mark (3Tm), 4T mark (4Tm), more than 5T mark (>=5Tm), makes the irradiation starting position of laser and the compensating movement of pulse width variation.
One example of ecad mark compensation when Fig. 8 represents that recording power is two-value.According to the symbol lengths that records mark, mark starting end position in described parameter is by moving dTtop and Ttop, record mark terminal location by Tlp and dTlp are moved, can suppress the starting end of mark and the edge of terminal moves, obtain good signal quality.
One example of ecad mark compensation when Fig. 9 represents that recording power is 4 value.According to the symbol lengths that records mark, mark terminal location, by dTtop and Ttop are moved, is recorded by dTe is moved in the mark starting end position in described parameter, can suppress the starting end of mark and the edge of terminal moves, and obtains good signal quality.Here, recording power is 4 values, but Pb=Pc, while being 3 value, also can apply identical mark compensation.
It should be noted that, by record compensate the amount of movement that produces use lag line can take from reference time small amount of movement for example Tw/16 move as unit.
In addition, while recording compensation, can from the position of synchronizeing with count signal, start compensation according to basic waveform, also can start from the position of synchronizeing with sub-count signal compensation.
Here, in basic waveform, the width of end power level and the width of cooling power in during each pulse width, mark form are more than 1T, but carry out after described record compensation, more than each pulse width of each mark lengths is at least 0.5Tw.At this moment, be difficult to be subject to the impact 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 the explanation of Fig. 5 (a)～(i) comparative example.
With reference to Figure 10.Figure 10 means the figure of structure of the recording processing system of this device.
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) represents to form 2Tw length mark.During mark forms, 305 pulses by length 1Tw, horizontal Pw1 form.During mark is non-formation start to place length 1Tw, horizontal Pb during, maintain Pa level before then during next mark forms.
Wave recording when Fig. 5 (d) represents to form 3Tw length mark.During mark forms, 305 after the pulse of length 1Tw, the horizontal Pw1 identical with Fig. 5 (c), then length 1Tw, horizontal Pw2 during.Same with the wave recording shown in Fig. 5 (c) during mark is non-formation, start to place length 1Tw, horizontal Pb during, maintain Pa level before then during next mark forms.Waveform during non-formation about mark, the waveform shown in later Fig. 5 (e)～(f) too.Be mark non-formation during not according to gap length, start to place length 1Tw, horizontal Pb during, maintain Pa level before then during next mark forms.During mark forms, 305 the shortest cooling period becomes 1Tw.
Wave recording when Fig. 5 (e) represents to form 4Tw length mark.During mark forms, 305 after the pulse of length 1Tw, the horizontal Pw1 identical with Fig. 5 (c), then length 1Tw, horizontal Pa during, length 1Tw, horizontal Pw3 during.
Fig. 5 (f) and (h) wave recording while represent forming respectively 5Tw mark lengths and 7Tw mark lengths.When the odd-multiple length mark of detection window width Tw, during length 1Tw, the horizontal Pa of the rear end of mark forming portion additional marking length 2Tw, length 1Tw, horizontal Pw3 during.During mark is non-formation not according to gap length, start to place length 1Tw, horizontal Pb during, then until during next mark forms, maintain Pa level.
Fig. 5 (g) and (i) wave recording while represent forming respectively 6Tw mark lengths and 8Tw mark lengths.When the even-multiple length mark of detection window width Tw, during length 1Tw, the horizontal Pa of the rear end of mark forming portion additional marking length 2Tw, length 1Tw, horizontal Pw3 during.
In comparative example, to compare with the embodiment of the present invention, the recording power of recording impulse example, by step-like change, necessitates so complicated power is controlled.In addition, when recording the mark of mark lengths 4Tw, be necessary at least in 3Tw length, use than average power level also high power level make semiconductor Laser device luminous.When the recording density rising of CD, while requiring to form small mark, in comparative example, it is long that irradiation time cannot become, so there is the shortcoming that cannot obtain required mark shape.
According to the present invention, to recording medium Implantation Energy, form and the mark that recording unit physical property is not different, accordingly, in the data recording equipment of record data, can form well mark with high speed precision.Accordingly, 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. a data record method, is to irradiate recording medium by the energy beam with pulse type, and the marginal position information recording at the mark using data as a plurality of length and interval is to the data record method in described recording medium, and described data record method comprises:
According to the data that will record, generate the steps A of NRZI data;
According to the symbol lengths x of each symbol comprising in NRZI data, 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, the shortest symbol lengths in described NRZI data is n, wherein n is 2 o'clock, during to be that the symbol of n and n+1 is corresponding record mark and form with symbol lengths x, assignment record pulse is the wave recording of 1, and for during to be that more than n+2 symbol is corresponding record mark and form with symbol lengths x, assignment record pulse (Pw) is a plurality of wave recording
Wave recording in during to be that more than n+2 symbol is corresponding record mark and form with symbol lengths x, decides wave recording so that it comprises with x divided by the mode of the recording impulse of business's equal amount of 2,
According to symbol lengths x, carry out the starting position of beginning pulse that comprises in corresponding wave recording during recording mark and forming and the displacement of the terminal location of cooling pulse.
2. a reproducting method, reproduces the data of record, recording method record as claimed in claim 1 for described data acquisition,
Described reproducting method, comprising:
Step to described recording medium illumination beam; With
Reproduce the described step that records mark.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003101248 | 2003-04-04 | ||
| JP2003-101248 | 2003-04-04 | ||
| JP2003279108 | 2003-07-24 | ||
| JP2003-279108 | 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 |
|---|---|
| CN101299336A CN101299336A (en) | 2008-11-05 |
| CN101299336B true CN101299336B (en) | 2014-04-30 |
Family
ID=36751958
Family Applications (6)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100970017A Pending CN101299335A (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 |
| CNB2004800092722A Expired - Fee Related CN100397495C (en) | 2003-04-04 | 2004-03-25 | Recording medium data recording method and device |
| CN200810097002.1A Expired - Fee Related CN101299336B (en) | 2003-04-04 | 2004-03-25 | Data recording method and data reproducing method |
| CN2008100888008A Expired - Fee Related CN101393751B (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 |
Family Applications Before (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100970017A Pending CN101299335A (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 |
| CNB2004800092722A Expired - Fee Related CN100397495C (en) | 2003-04-04 | 2004-03-25 | Recording medium data recording method and device |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100888008A Expired - Fee Related CN101393751B (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 |
Country Status (1)
| Country | Link |
|---|---|
| CN (6) | CN101299335A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (4)
| 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 |
| JPH09134525A (en) * | 1995-11-08 | 1997-05-20 | Ricoh Co Ltd | Information-recording method |
| JP3203618B2 (en) * | 1997-05-19 | 2001-08-27 | ヤマハ株式会社 | Optical disk record carrier |
| JPH11175976A (en) * | 1997-12-09 | 1999-07-02 | Hitachi Ltd | Information recording device |
-
2004
- 2004-03-25 CN CNA2008100970017A patent/CN101299335A/en active Pending
- 2004-03-25 CN CN2008100970040A patent/CN101299338B/en not_active Expired - Fee Related
- 2004-03-25 CN CNB2004800092722A patent/CN100397495C/en not_active Expired - Fee Related
- 2004-03-25 CN CN200810097002.1A patent/CN101299336B/en not_active Expired - Fee Related
- 2004-03-25 CN CN2008100888008A patent/CN101393751B/en not_active Expired - Fee Related
- 2004-03-25 CN CNA2008100970036A patent/CN101299337A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN101299337A (en) | 2008-11-05 |
| CN1771538A (en) | 2006-05-10 |
| CN101393751B (en) | 2013-03-27 |
| CN101299336A (en) | 2008-11-05 |
| CN101299338A (en) | 2008-11-05 |
| CN101299338B (en) | 2012-08-29 |
| CN100397495C (en) | 2008-06-25 |
| CN101393751A (en) | 2009-03-25 |
| CN101299335A (en) | 2008-11-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101599278B (en) | Method for optical recording, optical disc medium, and method for reproducing optical disc | |
| JP4324230B2 (en) | Data recording apparatus, data recording method, and recording medium | |
| KR100403614B1 (en) | Adaptive recording Control method for high dencity optical recording | |
| US20060215514A1 (en) | Optical recording equipment | |
| KR100607948B1 (en) | Method for recording data on an optical recording medium | |
| CN101299336B (en) | Data recording method and data reproducing method | |
| CN100363986C (en) | Information recording method | |
| KR100911140B1 (en) | Method and apparatus for recording data on an optical recording medium | |
| CN100444251C (en) | Optical recording medium, method and apparatus for recording data thereon | |
| KR20050045528A (en) | Information storage medium, method and apparatus for recording data thereon | |
| KR100608030B1 (en) | Method and apparatus for recording data on an optical recording medium | |
| KR20040101056A (en) | Recording apparatus of information recording medium, information recording medium, recording method of information recording medium, recording program of information recording medium, and program product | |
| JP2005032295A (en) | Information recording method | |
| KR20040028317A (en) | Method and apparatus for recording data on an optical recording medium | |
| KR20030028369A (en) | Method and apparatus for recording data on an optical recording medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140430 Termination date: 20200325 |