CN1967671B - Optical disk apparatus and writing method - Google Patents
Optical disk apparatus and writing method Download PDFInfo
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- CN1967671B CN1967671B CN200610146545.9A CN200610146545A CN1967671B CN 1967671 B CN1967671 B CN 1967671B CN 200610146545 A CN200610146545 A CN 200610146545A CN 1967671 B CN1967671 B CN 1967671B
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Abstract
Recording medium, optical disk apparatus and writing method are provide in the invention. Recording parameters are decided so that the time control information on at least the front edge and the rear edge of a parameter forming a mark of twice size or above of the laser spot diameter focused on the recording medium is substantially proportional to the recording linear velocity. The mark of twice size or above of the laser spot diameter focused on the recording medium is recorded and reproduced at a predetermined linear velocity to obtain an electric signal waveform having a time width Tm. A parameter is decided so as to control the laser pulse for recording information so that a voltage value change amount at two points at a distance Ts (Ts<Tm/2) in the time axis direction before and after the time position Tm/2 from the front edge of the waveform is substantially constant for the recording linear velocity change. Identification information indicating the parameter is described on the recording medium.
Description
The application is to be dividing an application of November 20, application number in 2003 are 200310115135.4, denomination of invention is " recording medium, optical disc apparatus and recording method " patented claim the applying date.
Technical field
The present invention relates to utilize laser beam to record information to the technology in CD.
Background technology
In the rewritable CD of DVD-RAM, DVD-RW, CD-RW etc. and the CD appending of DVD-R, CD-R etc., by Ear Mucosa Treated by He Ne Laser Irradiation to dish record surface on and recorded information.As form the illuminating method record the laser that mark uses on the record surface of CD, the recording impulse that has such irradiations such as CD-R to there is the time width corresponding with the length that records mark form record mark method, DVD-RAM etc. like that by being made as drivingly by recording pulse in mark forming process, control heat storage and form the method etc. of best titime mark.This waveform that records the recording impulse of mark of optimization is called to write-in policy.
Fig. 1 represents the mode chart as the write-in policy of the DVD-RAM of a kind of 4.7GB capacity of rewritable CD (being only designated as DVD-RAM below).Write-in policy while representing 11T (T is the recording clock cycle) label record in figure.As shown in the figure, the write-in policy of DVD-RAM consists of the front end pulse defining by TSFP, TEFP, TFP, the repetition pulse (also referred to as multiple-pulse) defining by TMP and the terminal pulse by TSLP, TELP, TLP definition.In addition, laser energy level is two-value or three values, but simple for explanation here, represents two-value situation.
This tactful front end pulse has " by TSFP, TEFP, defining the rising edge of waveform, the method for the absolute time of negative edge end " or " defining the absolute time of rising edge and the method for burst length width by TSFP, TFP " these two kinds of define methods.
In addition, in terminal pulse, also there are " method that is defined the absolute time at each edge by TSLP, TELP " or " defining the absolute time of negative edge and the method for burst length width by TELP, TLP " these two kinds of define methods.
For conduct, determine the TSFP of value of time location and the TELP of the back edge time location of decision rear end pulse of the leading edge of front end pulse, by recording mark lengths, with its front and back gap length, its value is changed.This is caused by underlying cause: the heat storage that the laser when recording mark causes and the impact of thermal diffusion are along with recording the length of mark and the length difference at interval before and after it.
Fig. 2 represents an example of the adjustment form of TSFP, TELP.3T, 4T, the 5T, >=6T (more than 6T) of the longitudinal direction of TSFP table represent to record the space length before mark, and the 3T of transverse direction, 4T, 5T, >=6T (more than 6T) represent to record the mark lengths of object.Equally, 3T, 4T, the 5T, >=6T (more than 6T) of the longitudinal direction of TELP table represent to record the space length after mark, and the 3T of transverse direction, 4T, 5T, >=6T (more than 6T) represent to record the mark lengths of object.Because making the edge of the write-in policy that determined by TSFP, TELP, the value in adjustment form moves, so arrange these tables below and be referred to as displacement table.In addition, the value of the edge timing of the wave recording of the decision TSFP that Fig. 1 is recorded etc. and the above-mentioned couplings such as displacement table, below, be referred to as recording parameters group.
Like this, the method that changes write-in policy by recording the relation of mark, gap length not only can be used for DVD-RAM, also can be widely used in DVD-RW, the CD-RW of rewritable Phase Transition Systems media as other, as appending in DVD-R, the CD-R etc. of pigment media.
In prior art, media fabricator is thought to optimum value under on-line velocity certain condition is recorded in media and recording parameters group is provided.This is because because the optimum value of the recording parameters group of the form of the write-in policy that comprises power level, timing and displacement table etc. differs widely because of the composition of recording medium, material etc., so think that media fabricator advises that write-in policy is best.For example, in DVD-RAM, be arranged in physical format information (Physical formatinformation (the PFI)) region in the control data field (Control Data Zone) in the ingress area (Lead in area) of inner ring and recorded above-mentioned recording parameters group.In addition, in JP 2003-85753 communique, JP 2002-260226 communique, recorded the prior art shown in above-mentioned.
Exist to form with in recording medium, the situation of materials variances is identical, in the aspects such as laser output power, circuit characteristic, also there are differences optical disc recording apparatus (below be designated as " driver ") is upper.Therefore, the best titime parameter in particular drive differs and is decided to be the best titime parameter on other drivers.Especially, because the recording parameters recording is in the media the optimal parameter while recording under specific linear velocity, so when the linear velocity except this certain line speed records information in recording medium, the pre-recorded recording parameters having not is best in the media.Therefore,, when the linear velocity outside the linear velocity corresponding with the pre-recorded optimal parameter having records, driver preferably determines the best titime parameter under this linear velocity.
But, in the recording medium of the best titime parameter under having recorded in advance certain line speed, carry out in the driver of information recording, in prior art, there is no to consider to obtain in drive-side the method for the best titime parameter of the linear velocity outside this specific linear velocity.
Summary of the invention
The first object of the present invention is to provide the suitable determining method of the recording parameters that media fabricator provides and uses this recording parameters, obtains the method for the recording parameters under the linear velocity outside the linear velocity of media fabricator supposition.
Then,, when research reaches the linear velocity of regulation, switch the variable-ratio recording method of write-in policy.
Generally, the thermal diffusion amount and the line speed record that record mark front end are proportional, record the hot memory space of mark rear end and the square root of line speed record is proportional.In addition, by recording power, the Ear Mucosa Treated by He Ne Laser Irradiation of power level of eliminating the regulation of power etc. be applied to the energy of recording medium and the Ear Mucosa Treated by He Ne Laser Irradiation power level of per unit area proportional, roughly proportional with writing speed.
But, when write-in policy is different, because the proportionate relationship of above-mentioned thermal diffusion amount, hot memory space, recording laser power and writing speed is destroyed, so the recording parameters of any linear velocity that the simple interpolation (interpolation method, extrapolation) of the best titime parameter by pre-recorded a plurality of linear velocities in recording medium is tried to achieve is not best titime parameter conventionally.Therefore, as CAV (constant angular velocity: Constant Angler Velocity) record, gradually change in the recording method of linear velocity of record, as previously mentioned, existence is calculated successively the best titime parameter under each line speed record by simple interpolating method from different write-in policies, realizes suitable variable-ratio and records difficult problem.
Although think while reaching the linear velocity of regulation when CAV records at every turn, adopt the recording method of switching write-in policy, but while using this recording method, write-in policy is switched suddenly in position in regulation, aforementioned proportion relation becomes discontinuous as mentioned above, so in the front and back of switchover policy, for example, even its shape of identical mark (being 3T mark) is also different.Thus, during data reproduction after write-in policy switching position, because switching, record mark characteristic, the characteristic that produces the reproduction parameter of not following equilibrium, group delay etc. is switched, and reproduces the problem of quality deterioration before and after successively reproducing write-in policy switches in two region situations.
The second object of the present invention is by guaranteeing the continuity of recording parameters group, guarantees to record the continuity of mark shape, and improves and reproduce quality.
The problems referred to above are improved by a kind of recording medium, this recording medium is by irradiating laser pulse, on recording layer, form mark and recorded information, record identifying information, this identifying information represents to have recorded roughly a plurality of control parameter group of proportional relation of the variation timing of laser pulse power level of the mark more than the diameter of above-mentioned recording layer laser facula for record length and line speed record.
In addition, passing through irradiating laser pulse, on recording layer, form mark and the recording medium of recorded information, utilize the recording medium record the control parameter for each linear velocity being determined by following step to improve: with the step of the first mark of the above length of laser spot diameter of the above-mentioned recording layer of First Line speed record; Step with the second linear velocity record with same the second long mark of above-mentioned the first mark; To with the linear velocity of regulation, reproduce above-mentioned first or the time width of the resulting electric signal waveform of the second mark while being made as Tm, using the time location of the Tm/2 that starts from the leading edge of this waveform as benchmark, obtain on time-axis direction before and after only at a distance of the step of the variable quantity of the magnitude of voltage of 2 of Ts (wherein Ts < Tm/2); With the control parameter of variation timing that determines the power level of laser pulse, also certain step roughly of this variable quantity while making to record by any linear velocity.
And, at following optical disc apparatus: there is the laser instrument to CD irradiating laser, control the laser control device of this laser instrument, rotarily actuate the rotating driving device of above-mentioned CD, by by laser pulses irradiate to the recording layer of above-mentioned CD and form mark and on above-mentioned CD recorded information, utilize following optical disc apparatus to be improved, wherein, above-mentioned laser control device, use for recording the roughly control parameter of proportional relation of the variation timing of power level of laser pulse of mark of the above length of above-mentioned recording layer laser spot diameter and line speed record, carry out changing successively or by stages the continuous recording of line speed record.。
And, at following optical disc apparatus: there is the laser instrument to CD irradiating laser, control the laser control device of this laser instrument, rotarily actuate the rotating driving device of above-mentioned CD, by by laser pulses irradiate in the recording layer of above-mentioned CD, form mark and on above-mentioned CD recorded information, utilize following optical disc apparatus to be improved, wherein, above-mentioned laser control device is used the control parameter of each linear velocity of determining through the following steps, carry out changing successively or by stages the continuous recording of line speed record: with the step of the first mark of the above length of laser spot diameter of the above-mentioned recording layer of First Line speed record, step with the second linear velocity record with same the second long mark of above-mentioned the first mark, to with the linear velocity of regulation, reproduce above-mentioned first or the time width of the resulting electric signal waveform of the second mark while being made as Tm, using the time location of the Tm/2 that starts from the leading edge of this waveform as benchmark, obtain on time-axis direction before and after only at a distance of the step of the variable quantity of the magnitude of voltage of 2 of Ts (wherein Ts < Tm/2), with the control parameter of variation timing that determines the power level of laser pulse, also certain step roughly of this variable quantity while making to record by any linear velocity.
In addition, passing through laser pulses irradiate in the recording layer of CD, form mark and the recording method of recorded information on above-mentioned CD, utilize and improved as follows, wherein, use for recording the roughly control parameter of proportional relation of the variation timing of power level of laser pulse of mark of the above length of laser spot diameter of above-mentioned recording layer and line speed record, carry out changing successively or by stages the continuous recording of line speed record.
According to the present invention, can guarantee to reproduce the shape continuity of waveform, can carry out stable reproduction.In addition, the recording parameters of the writing speed outside the writing speed that the recording parameters that can easily calculate from the recording parameters being provided by media fabricator is provided by media fabricator defines, carrying out CAV while recording, can calculate suitable recording parameters.
In addition, for drive maker, when realizing the high-speed record of being undertaken by CAV record, can make the establishing method of write-in policy simple, the shortening of the learning time in the time of can realizing the shortening of driver development time and the adjustment of the write-in policy of driver.
In addition, by also use step of the present invention in driver, media fabricator, do not provide in the media corresponding to the recording parameters of variable-ratio record, can obtain write-in policy and recording parameters corresponding to variable-ratio record yet, and realize the variable-ratio record of CAV record etc.Further, by with reference to variable-ratio record mark, can easily differentiate the media of supporting variable-ratio record, can shorten and carry out the write-in policy learning time of variable-ratio while recording.
Accompanying drawing explanation
Fig. 1 is the mode chart of the 11T label record waveform of 4.7GB DVD-RAM.
Fig. 2 means the figure of an example of recording parameters control table.
Fig. 3 is example and its mode chart that 10T mark reproduces waveform.
Fig. 4 means the mode chart of an example of the relation of writing speed and recording parameters.
Fig. 5 is example and its mode chart that waveform is reproduced at 10T interval.
Fig. 6 is the oscillogram of the not posting field of 4.7GB DVD-RAM.
Fig. 7 is example and its mode chart that the 10T mark after adjusting reproduces waveform.
Fig. 8 means that 14T mark reproduces the mode chart of an example of waveform and sampling pulse.
Fig. 9 means that 14T mark reproduces the mode chart of an example of waveform and its sampling series.
Figure 10 represents the process flow diagram of the sequence of movement of driver.
Figure 11 is the block diagram that has been suitable for driver of the present invention.
Figure 12 means the mode chart of an example of the relation of writing speed and standard recording parameter.
Embodiment
The DVD-RAM of take below illustrates the first embodiment as example.As previously described, in DVD-RAM, recording parameters is selected by media fabricator, is recorded in after DVD-RAM goes up and dispatches from the factory.
As present DVD-RAM standard, 2 speeds (being called " 2x " below) record standard, 3 speeds (being called " 3x " below) record standard have been issued, also predetermined issue 5 speeds (being called " 5x " below) record standard.That is,, from guaranteeing the compatible viewpoint with slave device, consider to provide at 5x and record in respective disc (below be designated as DVD-RAM5x media) and also record the recording parameters corresponding to 2x record, 3x record.In addition, by using the recording parameters of each writing speed, at 5x, record in driver and can carry out the writing speed that inner lane is 2x, the CAV record of the writing speed that outmost turns is 5x.One example of the step of the recording parameters under the various writing speeds that represent below to determine to record in DVD-RAM.
In step 1, first by provided various writing speeds, at this moment for the recording parameters group in 2x, 3x, 5x situation is fixed tentatively the linear value into writing speed.This be because, be the variable-ratio record of corresponding CAV record etc., need between the recording parameters that provide and writing speed for linear.
The long mark of step 2 reproduces waveform adjustment and master record linear-in-the-parameter is confirmed
In step 2, use the tentative recording parameters setting in step 1 under each writing speed, to record long mark more than 6T, the reproduction waveform while relatively reproducing under certain speed.
Conventionally, in the reproduction of CD, when reproduction is more than or equal to the mark of spot diameter, the amplitude level of reproducing signal is saturated, and the generation of the waveform offset deviation being caused by the difference of light spot shape is very little.In the DVD-RAM of the present embodiment situation, the diameter of light beam during reproduction is used the light beam of 0.86 micron, therefore be equivalent to length and amplitude more than the beam diameter 6T signal of 0.84 micron is about equally roughly certain.Therefore, the waveform under the long mark more than 6T carries out the initial adjustment of recording parameters as benchmark, afterwards, adjusts and forms the recording parameters that short mark is used.This reproduction speed can be also the minimum reproduction speed of being stipulated by media.
Fig. 3 represents the reproduction waveform 301 of the long mark (10T) that records under a certain writing speed in DVD-RAM.This figure is the example of 10T waveform, and the part that waveform is low represents dark portion (labeling section).At reproduction speed, be 2x, when the parameter of playback system is the canonical parameter of recording in DVD-RAM standard, reproduce.The right figure of Fig. 3 represents that pattern takes out left figure waveform.Here, by in the center of waveform relative record mark waveform, this situation for before and after the position 302 of 5T is divided into, take out the minimum 303 of waveform of first half and the minimum 304 of the waveform of latter half, calculate the slope A2x of the straight line 305 of the waveform position that links both.Also calculate the slope under 3x, 5x writing speed, be made as respectively A3x, A5x.Media fabricator, when the recording parameters that determines to provide, adjusts the recording parameters group of each speed, and the value that makes A2x, A3x, A5x is certain (preferably in ± 10% scope) roughly.
In addition, here, although adjust according to the slope of the minimum point-to-point transmission of the minimum of first half, latter half, the present invention is not limited to this, also can be configured to and obtain from mark center only at a distance of the slope of the point-to-point transmission of predetermined distance, and adjust according to this slope.
For the recording parameters (, being referred to as master record parameter below) of recommending in media standard not carry out the adjustment of driver, when this is adjusted, confirm that it is for the linearity of writing speed.In the DVD-RAM of the present embodiment Fig. 1 " TFP, TMP, TLP, TCL, TEFP, TSLP ", Fig. 2 " TELP while then following the above interval of 6T after TSFP during the above mark of 6T (Fig. 2 201), mark more than 6T after interval more than 6T (Fig. 2 202) is equivalent to this master record parameter.
As previously mentioned, can set above-mentioned master record parameter, make any one parameter relative record speed all retention wire sexual intercourse in theory.But, can think and on each recording parameters, produce some errors by the determining step of recording parameters and the choice of numerical value.
Therefore, as shown in Figure 4, from the recording parameters value 401 of being obtained by maximum recording rate (during this example 5x record) and the recording parameters value 402 of being obtained by all time low speed (during this example, 2x records), calculate the recording parameters value 404 of (3x during this example) in the speed that media fabricator therebetween provides recording parameters, calculate the poor Δ Pt406 of 403 of the parameter values that record for 3x in the above-mentioned speed obtained in this value and step 1, step 2, this routine situation.
This Δ Pt is compared with the error permissible value of predefined relative each recording parameters, if Δ Pt lower than error permissible value, stops adjusting.If while being greater than error permissible value, again depend on the adjustment that long mark reproduces the recording parameters of waveform.As a result, when the slope of each writing speed of the reproduction waveform of defined long mark and the linearity of master record parameter do not meet rated condition in above-mentioned, can depend on the composition of recording medium, the improvement of the recording medium of the estimation of material etc.
In addition, the condition of above-mentioned middle recording parameters extracts the data t while reproducing with wave recording
0clock jitter (being only designated as shake below), reproduce more simultaneously carrying out of asymmetric etc. the standard value of waveform.
Step 3 modulation displacement table, power level
In step 3, after recording parameters is adjusted, carry out the adjustment of the recording parameters except the master record parameter of adjusting in step 2 in each writing speed.In the present embodiment, in displacement table, the region outside 201 of Fig. 2,202 and the adjustment of recording power level are equivalent to this.As method of adjustment, have reproduction is dithered as to the method minimizing etc., also can adopt as DVD-RAM defined method in media standard.
In addition, in step 3, do not change adjusted master record parameter in step 2.This is because the long mark that will preserve in step 2 reproduces the shape of waveform and the linearity of recording parameters relative record speed.
Step 4 confirms that recording parameters is linear
In step 4, for the recording parameters under each writing speed of extracting out in step 3, check the linearity of relative record speed.At this routine DVD-RAM, for each displacement table of TSFP, the TELP shown in each recording parameters shown in Fig. 1 and Fig. 2, confirm the linearity of its relative record speed.
When having guaranteed master record parameter linear in step 2, can set these recording parameterses, make each recording parameters relative record speed retention wire sexual intercourse in theory.But, identical with step 2, owing to considering that each recording parameters value has by accepting or rejecting, wait the error causing, thus identical with step 2, each recording parameters is set to permissible error value, and confirm linear.
Step 5 is set the sign of corresponding variable speed recording
Also consider to form and material because of the film of recording medium, suitable recording parameters is selected in the adjustment that can not be undertaken by step 1-4.Because this media have corresponding difficulty at the variable-ratio of CAV record etc. aspect recording, so be necessary to distinguish with the recording parameters that meets the adjustment that depends on step 1-4.In step 5, by arranging, indicate that no record, by the determination flag of the adjusted recording parameters of step 1-4, distinguishes.
For example, in DVD-RAM standard, after 613 bits that record in the PF11 sector of the recording parameters group being provided by media fabricator, be made as reserved (VB vacancy bit), here, by setting the described determination flag of a bit, distinguish.
Driver confirms to have or not determination flag when media insert, at bit, be to be identified as variable-ratio at 1 o'clock to record corresponding media, in all time low speed and the writing speed between maximum recording rate of media, from the recording parameters being provided by media fabricator, use described all time low speed and maximum recording rate are carried out to the recording parameters after linear interpolation, carry out record.When this routine DVD-RAM5x records corresponding media, can from by media fabricator to 2x record and 5x record the recording parameters providing calculate therebetween such as the recording parameters the writing speed of 2.5x, 3x, 4x etc.
By using the step 1-4 shown in the present embodiment, recording parameters in the time of can easily calculating the writing speed except writing speed corresponding to the recording parameters with being provided by media fabricator from the recording parameters that media fabricator provides, in changing gradually the CAV record etc. of writing speed, when carrying out continuous recording action, conventionally can calculate best titime parameter.In addition, by the CD of the present embodiment, can guarantee high-quality CAV record, user can carry out at a high speed high-quality data recording.
In addition, by the sign that represents to adopt step 1-4 is set, whether can identify this recording medium corresponding to CAV record, confirming as while recording corresponding to CAV, carry out CAV record, confirming as when not corresponding to CAV and recording, can not carry out the suitable record controls of CAV record.In addition, concerning drive maker, when realizing the high-speed record being brought by CAV record, the establishing method of write-in policy can be simplified, the shortening of learning time when write-in policy is adjusted can be realized in the shortening of driver development time and driver.
But, when adopting step 1-4 by assurances such as media standard, owing to not needing whether to identify this recording medium corresponding to CAV record, so there is no need to arrange above-mentioned mark.
Further, even when the region after being recorded by different writing speeds is adjacent, owing to reproducing the shape of waveform, be also consistent, so can carry out stable reproduction.
Embodiment 2
The second embodiment is then described.Although the present embodiment and the first embodiment same settings recording parameters are different from the step 2 of the first embodiment.The following describes the step 2 of the present embodiment.
The reproduction waveform of the long mark although monitor each recording parameters that operating speed is different in the step 2 of the first embodiment more than the 6T recording, make the slope of this labeling section between each writing speed roughly consistent, but in the present embodiment relatively the slope of long mark reproduction waveform more than 6T and with more than 6T long interval parts or with posting field not in the slope of reproduction waveform, decide best recording parameters.
For example, if interval parts as shown in Figure 5, for the waveform 501 center of interval parts, is the region, front and back of 5T part when 10T interval, the slope of the straight line 504 of the peak value 502,503 of connection regional is made as to reference value Asp.Or, measure any two interregional average potential in a track of posting field not, from this difference, calculate the not waveform slope reference value Anw of posting field.For example, in DVD-RAM, as shown in Figure 6, from average potential V61, the V62 of the n sector (m, n is arbitrary value) of the m sector, front and back in PID (Physical ID) region, calculate slope 601, be made as reference value Anw.
Then,, as required in the first embodiment, obtain slope Ax2, Ax3, the Ax5 of labeling section.In the present embodiment, setting recording parameter, and make Ax2, the Ax3 of labeling section, Ax5 roughly consistent with slope, Asp, the Anw of interval parts.Fig. 7 represents the reproduction waveform of the labeling section after actual adjustment.Identical with the first embodiment, at the slope that long mark is reproduced to the labeling section of waveform, be made as the peak value 702,703 of central point 701, its left and right, when relative each speed definition of obtained slope 704 is Ax2, Ax3, Ax5, as shown in 704 of Fig. 7, adjust recording parameters, make the difference of these slope value Ax2, Ax3, Ax5 and Asp, Anw be roughly zero.
By the step by the present embodiment, carry out the adjustment of recording parameters, compare with the long mark of the first embodiment, the shape of mark is close to uniform ellipse, and the elimination characteristic in the time of can improving rewriting is with crosstalk effect and can further improve the permanance of coiling relative rewriting.
Embodiment 3
The 3rd embodiment is then described.In the present embodiment, it is identical with the first embodiment that the establishing method of recording parameters and variable-ratio record corresponding bit etc., but the linear confirmation method of the recording parameters in step 2,4 is different from it.The following describes the step 2,4 of the present embodiment.
In the step 2 of embodiment 1, in the first embodiment, by the recording parameters of trying to achieve by linear interpolation with from the error that the long mark to more than 6T reproduces the recording parameters that the waveform slope condition of waveform definition obtains, compare with the error permissible value presetting, carry out the judgement of the linearity formation of recording parameters.
In the step 2 of the present embodiment, only obtain the lower master record parameter (being made as master record parameter A) of the maximum recording rate (during the present embodiment be 5x record) of media and the master record parameter (being made as master record B parameter) under all time low speed (during the present embodiment, 2x records).To the master record parameter being provided by media fabricator under writing speed therebetween (being made as master record parameters C), from master record parameter A, B, by linear interpolation, obtain.
If be applicable to Fig. 4,401 is master record parameter A, and 402 is that master record B parameter, 404 is master record parameters C.Below, if for example, by reproduction speed, the DVD-RAM of regulation, be reproduced in the region of using basic parameter C to be recorded in the adaptation writing speed of basic parameter C with 2x, obtain and reproduce shake.When the predefined regulation of the relative institute of jitter value σ when at this moment allows a jitter value σ r to be σ < σ r, stop adjusting, when σ > σ r, identical with the first embodiment, carry out by " depending on the readjusting of recording parameters that long mark reproduces waveform " and " depending on the improvement of recording medium of the estimation etc. of the forming of recording medium, material " etc.
For step 4, also identical with step 2, the recording parameters being provided by media production person under interpolation writing speed therebetween from the recording parameters that the maximum recording rate by media and all time low speed are obtained, by comparing between the permission jitter value σ rs of the reproduction jitter sigma s of the result being recorded by this recording parameters and predefined regulation, confirm the linearity of recording parameters.
In the step of the present embodiment, owing to not needing to extract master record parameter and other recording parameterses except maximum recording rate, all time low speed out, so can realize master record parameter and the shortening of recording parameters decision time.
In addition, in the present embodiment, in order to carry out the interpolation of master record parameter and other recording parameterses, obtain the maximum recording rate of media defined and the master record parameter under all time low speed and other recording parameterses, but also can from the master record parameter of the plural friction speed arbitrarily that provided by media fabricator and other recording parameterses, by interpolation, extrapolation, carry out interpolation.
Embodiment 4
Then, illustrate that an example that has been suitable for driver of the present invention is used as the fourth embodiment of the present invention.Figure 10 is the example for the treatment of step of having carried out the driver of variable-ratio record on having recorded the dish of the recommendation record parameter of a plurality of writing speeds.
Figure 11 represents the structure of the driver of the present embodiment.In the driver of the present embodiment, by being loaded in the laser driver (LDD) 112 on light picker 110, carry out driving laser diode 111, from object lens 113 Emission Lasers.By the waveform parameter control part in DSP105, control this lasing fluorescence timing.In the present embodiment, although for Waveform Control portion is built in to the structure in DSP, it can be also chip separately and exclusively, also can be in addition the structure being loaded on LDD.
Reproducing signal by RF F/E LSI104, carries out waveform processing by waveform obtaining section and the wave form analysis portion of DSP inside from light picker.In waveform obtaining section, obtained Wave data is carried out to A/D conversion and be used as after numerical data, deliver in wave form analysis portion.In addition, microcomputer 106 also can directly be obtained data, and a part for waveform can be carried out wave form analysis by microcomputer.Further, DSP inside exists variable-ratio to record respective flag measuring ability, is determined with without this sign.In addition, also can differentiate and have no marks by microcomputer, and not necessarily need to be positioned at DSP inside.
First, be confirmed whether to record respective flag (step 1003) reproducing the variable-ratio shown in the step 5 that records the first embodiment on object media.For the media of having set up variable-ratio record mark (being the media corresponding to variable-ratio record), using the recording parameters under record certain line speed in the media as basis, by linear operation, obtain the value of the recording parameters under linear velocity in addition, carry out variable-ratio record (step 1004-1008).
Step 2 is confirmed the linearity of media fabricator recommendation record parameter
Do not setting up variable-ratio record mark, or while not setting variable-ratio record mark itself, in the recording parameters that the media fabricator that recorded in the media recommends, confirm to recommend there is no the master record parameter of change and the linearity (step 1009) of writing speed in driver.In addition, as confirmation method, for example have in the method shown in the step 2 of the first embodiment of the invention of the recording parameters error amount of definition regulation, or the method shown in the step 2 of the third embodiment of the present invention of the shake permissible value of definition regulation etc.
In the time can confirming linearity, the recording parameters of each linear velocity of recording parameters interpolation that read from these media on limit, the variable-ratio record (step 1004-1008) of CAV record etc. is carried out on limit.
Do not confirming linear in the situation that, using a part for record recording parameters in the media, extracting master record parameter and other recording parameterses (step 1010) out.
Step 3 depends on the extraction of master record parameter of long mark waveform and linear confirmation
Recording parameters under a plurality of writing speeds that use is provided by media fabricator, records long mark more than 6T under each writing speed, long interval.In recording the region at these marks, interval, extract the reproduction waveform of long mark more than 6T, identical with defined situation in the first embodiment, the long mark while reproducing under mensuration certain speed reproduces the slope of waveform.In its result, adjust the recording parameters at more than relative 6T long mark, long interval, make the slope of long mark reproduction waveform of each writing speed roughly consistent.This recording parameters is equivalent to the master record parameter of the first embodiment.
The assay method that reproduces waveform slope as long mark, has following method: for example, when DVD-RAM, extract the 14T as recessed pattern in driver out, as shown in Figure 8, for 14T mark, reproduce waveform 801, generate the sampling pulse shown in 802,803.Because recessed pattern repeats in identical timing, so can generate this sampling pulse.This sampling pulse only generates wide curtain heading tape in identical position, mind-set both sides from 14T mark reproduction waveform.Only calculate to keep magnitude of voltage V1, the difference DELTA V of V2 of the holding signal 804,805 during the curtain heading tape of sampling pulse 802,803, and this value is defined as to the slope that long mark reproduces waveform.
In addition, as additive method, consider following method, as shown in Figure 9, for example at reproduction clock period T, will reproduce waveform 901AD conversion, and in resulting sampling series, the long mark of extracting regulation out reproduces waveform, when this example, is 14T reproduction waveform, the part of only leaving equal time width in the time centre from this long mark waveform is calculated the mean value of the sampling value 902,903 that equates number of samples, and the difference of resulting mean value is defined as to the slope etc. that long mark reproduces waveform.By said method, decide linear dimensions.
Further, in order to confirm, for the master record parameter of each writing speed obtained above, after in fact recording, confirm linear (step 1011).Confirmation can be used the method for the step 3 described in the first and second embodiment etc.In this step, when not confirming master record parameter linear, adopt the means of the slope etc. that turns back to the long mark reproduction of step 2 change waveform.Even like this, in the situation that do not confirm the linear of master record parameter, be also made as the stabilized speed record (step 1013) of only implementing CLV record etc.
Preferably limit is carried out in the extraction of this master record parameter and is linearly confirmed, the standard value that data t0 clock jitter when limit and reproducing waveform (being only designated as shake below), reproduction waveform are asymmetric etc. compares.
Step 4 displacement table, power level adjustment
After adjusting master record parameter, in each writing speed, the recording parameters outside the master record parameter of adjusting in set-up procedure 2.At this moment, identical with the first embodiment, do not change the master record parameter of adjusting in step 2.Although method of adjustment proposes there are various gimmicks, also can adopt as defined method in the media standard of DVD-RAM etc.
Step 5 confirms that recording parameters is linear
For the recording parameters under each writing speed of extracting out in step 3, check the linearity of relative record speed.Due at this moment also identical with the step 2 of the first embodiment of the present invention, consider that each recording parameters value has the error producing because accepting or rejecting, thus identical with step 2, each recording parameters is set to permissible error value, confirm linearity.
In having used the driver of above-mentioned steps, there is following advantage.
1. by with reference to variable-ratio record mark, can easily differentiate the media of supporting variable-ratio record.
2. differentiating when supporting the media of variable-ratio record, the write-in policy when variable-ratio that can easily carry out CAV etc. records, can shorten learning time of write-in policy.
3. by thinking with reference to variable-ratio record mark, do not supporting in the media of variable-ratio record, can prevent from advance using the recording parameters being provided by media fabricator and to carry out the record of variable-ratio while recording not good.
Even by above-mentioned steps for not providing the media corresponding to the recording parameters of variable-ratio record by media fabricator, also can obtain write-in policy and recording parameters corresponding to variable-ratio record, and realize the variable-ratio record of CAV record etc.
In addition, by by by the resulting recording parameters of this step, remained on internal drive such as in EEPROM etc., while below same media being inserted into driver, can fast setting recording parameters, and the effect of recording parameters learning time of can being reduced etc.
In addition, in above-mentioned, can consider to change variable-ratio record is provided using the recording parameters being provided by media fabricator as basis, and using the recording parameters being provided by media fabricator as basis, use is by defined method of standard of media etc., on driver, use the result of having learnt best titime parameter, and the recording parameters that replacement is provided by media fabricator carries out variable-ratio record.
Embodiment 5
Then, represent the fifth embodiment of the present invention.In the present embodiment, identical with the first embodiment for the establishing method of recording parameters, variable-ratio degree of record corresponding bit etc., but on step 2,4 the linear confirmation method of recording parameters, there are differences.The following describes the step 2,4 of the present embodiment.
The feature of the present embodiment is, in the step 2,4 of the first embodiment, and when confirming parameter relative record speed linear of time-axis direction information of regulation recording impulse, the value recording clock is used this parameter of standardization in the cycle after.For example, when being DVD-RAM, the recording parameters that becomes object is TFP, TMP, TLP, TCL, TEFP, TSLP, TSFP, TELP.
Arrange as Tpr, and use Figure 12 to describe.Recording clock under each writing speed, by the recording parameters value (using it as Tpr5x) of being tried to achieve by maximum recording rate (during this example be 5x record), recording parameters value (using it as the Tpr2x) standardization of being tried to achieve by all time low speed (being that 2x records during this example) in the cycle, and is made as standardized recorded parameter value Tpr5xs, Tpr2xs by these values respectively.By the formula (1) below, carry out standardization.
Tpr[n]xs＝Tpr[n]x/Tw[n].....(1)
In formula (1), [n] represents speed (writing speed), Tw[n] represent the recording clock cycle under n speed.By 1201 expression Tpr5xs, same on Figure 12, on Figure 12 by 1202 expression Tpr2xs.
Recording parameters value 1204 (being made as Tpr3xs_1) from it calculates the speed that standardization media fabricator provides recording parameters (this example is 3x record).Calculate the above-mentioned speed obtained in the step 1,2 that this Tpr3xs_1 is identical with the step shown in the first embodiment, in this routine situation, be the difference DELTA Tpr3xs 1206 of the standardized recorded parameter value Tpr3xs after the parameter value (being made as Tpr3x) of through type (1) standardization 3x record (Figure 12 1203), the adjustment of the relatively permissible error value of its relatively predefined standardized recorded parameter, and judgement stops.
Thus can be linear by not relying on the validation of information of time-axis direction of recording impulse of writing speed, more easily guarantee linearity.
In addition, in the present embodiment, although come to compare with permissible error value by the difference of standardized recorded parameter value, but also can make by formula (2) below above-mentioned middle obtained Tpr3xs_1 get back to former temporal information Tpr3x_1, and calculate it and there is no the difference DELTA Tpr3x of standardized above-mentioned Tpr3x, relatively the error permissible value of its relatively predefined recording parameters, judges to adjust to stop.
Tpr3x_1＝Tpr3xs_1×Tw[3]......(2)
Embodiment 6
Then represent the sixth embodiment of the present invention.In the present embodiment, to record corresponding bit etc. identical with the 3rd embodiment for the establishing method of recording parameters and variable-ratio, but the linear confirmation method of the recording parameters in step 2,4 exists different.The following describes the step 2,4 of the present embodiment.
The present embodiment is characterised in that, in the step 2,4 of the 3rd embodiment, when confirming parameter relative record speed linear of information of time-axis direction of regulation recording impulse, uses the value after recording clock cycle this parameter of internal standardization.In the method described in the 5th described embodiment, can obtain normalized recording parameters Tpr3xs_1 from normalized recording parameters Tpr5xs, Tpr2xs, use above-mentioned formula (2) to calculate temporal information Tpr3x_1.The reproduction jitter sigma s of the result from the recording parameters Tpr3x_1 by obtaining like this records and predefined regulation allow the relatively middle linearity of confirming recording parameters of jitter value σ rs.
Thus, can be linear by not relying on the validation of information of time-axis direction of recording impulse of writing speed, more easily guarantee linearity.
Embodiment 7
The seventh embodiment of the present invention is then described.At the present embodiment, be characterised in that: in the situation that carry out calculating when variable-ratio records recording parameters in the step 1 of the fourth embodiment of the present invention, in calculating the recording parameters process that represents temporal information, by the method identical with the method shown in the fifth embodiment of the present invention, use by the parameter after recording clock cycle criterion and carry out linear operation.
In addition, while confirming recording parameters in the step 2-step 4 of the fourth embodiment of the present invention linear, in the linear process of recording parameters of confirming expression temporal information, it is characterized in that: by the method identical with the method shown in the fifth embodiment of the present invention, use by the parameter after recording clock cycle criterion and carry out linearity confirmation.
Thus, can be linear by not relying on the validation of information of time-axis direction of recording impulse of writing speed, more easily guarantee linearity.
In addition, long the mark more than 6T of above-described embodiment, long interval refer to the mark part of the waveform while wanting to make to reproduce, the voltage of compartment is not subject to the mark before and after it, mark, the gap length that interval affects, and also can be defined as one times of above mark, interval of the laser spot diameter focusing in recording medium.For example, when the laser spot diameter of DVD-RAM pen recorder is made as to 1 micron, it is equivalent to the length of 7.14T.That is, also can carry out above-mentioned all steps with long mark more than 8T, long interval.
Claims (3)
1. the timing determining method of a laser pulse, be the timing determining method of the laser pulse of the clocking information that forms laser pulse under the CD different writing speeds that record, more than three of the recording layer of mark, when the mark of the length more than diameter of the laser facula of described recording layer is recorded from the thering is irradiating laser hot spot timing that determines laser pulse, it is characterized in that:
Described three different writing speeds are called to the first writing speed, the second writing speed, the 3rd writing speed, for 3 writing speeds in this writing speed, different, the timing of the laser pulse under the third speed deriving according to the proportionate relationship of the timing of the laser pulse from first, second writing speed and this first, second writing speed with, the mode of the difference of the timing of the laser pulse under the third speed recording on this CD below the value of regulation, determines the timing of the laser pulse under third speed and is recorded on described CD.
2. the timing determining method of laser pulse according to claim 1, is characterized in that:
At the clocking information of the laser pulse of disc recording by hole row record.
3. the timing determining method of laser pulse according to claim 1, is characterized in that:
The clocking information of the laser pulse of disc recording be recorded on described dish cannot additional record posting field.
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| JP2003-129677 | 2003-05-08 | ||
| JP2003129677 | 2003-05-08 | ||
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| JP2003329289 | 2003-09-22 | ||
| JP2003329289A JP4154304B2 (en) | 2003-05-08 | 2003-09-22 | Recording medium, optical disc apparatus, and recording method |
| JP2003-329289 | 2003-09-22 |
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| CNB2003101151354A Division CN1294565C (en) | 2003-05-08 | 2003-11-20 | Recording medium, optical disk apparatus and writing method |
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| CN1967671B true CN1967671B (en) | 2014-03-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1270385A (en) * | 1999-04-13 | 2000-10-18 | 株式会社日立制作所 | Information recording method and device |
| US6459666B1 (en) * | 1999-09-06 | 2002-10-01 | Ricoh Company, Ltd. | Information recording apparatus and method |
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| JP2000076653A (en) * | 1998-09-01 | 2000-03-14 | Pioneer Electronic Corp | Information recorder |
| JP2000149262A (en) * | 1998-11-13 | 2000-05-30 | Hitachi Ltd | Information recording method and information recording device |
| JP2000293857A (en) * | 1999-02-02 | 2000-10-20 | Matsushita Electric Ind Co Ltd | Optical recording medium, and method and device for recording and reproducing the medium |
| JP2001297436A (en) * | 2000-04-12 | 2001-10-26 | Ricoh Co Ltd | Information recording method, information recorder and information processor |
| JP2001229564A (en) * | 2000-02-17 | 2001-08-24 | Matsushita Electric Ind Co Ltd | Optical disk recording method and device |
| JP2002358646A (en) * | 2001-05-30 | 2002-12-13 | Hitachi Ltd | Optical information recording and reproducing system and recording medium and device therefor |
| CN1967671B (en) * | 2003-05-08 | 2014-03-26 | 日立民用电子株式会社 | Optical disk apparatus and writing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1270385A (en) * | 1999-04-13 | 2000-10-18 | 株式会社日立制作所 | Information recording method and device |
| US6459666B1 (en) * | 1999-09-06 | 2002-10-01 | Ricoh Company, Ltd. | Information recording apparatus and method |
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| JP5164642B2 (en) | 2013-03-21 |
| JP2011146122A (en) | 2011-07-28 |
| JP5250651B2 (en) | 2013-07-31 |
| JP2008198353A (en) | 2008-08-28 |
| CN1967671A (en) | 2007-05-23 |
| JP2010225272A (en) | 2010-10-07 |
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