CN1967671A - Recording medium, optical disk apparatus and writing method - Google Patents
Recording medium, optical disk apparatus and writing method Download PDFInfo
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- CN1967671A CN1967671A CN 200610146545 CN200610146545A CN1967671A CN 1967671 A CN1967671 A CN 1967671A CN 200610146545 CN200610146545 CN 200610146545 CN 200610146545 A CN200610146545 A CN 200610146545A CN 1967671 A CN1967671 A CN 1967671A
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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 be that November 20, application number in 2003 are 200310115135.4 the applying date, denomination of invention divides an application for the patented claim of " recording medium, optical disc apparatus and recording method ".
Technical field
The present invention relates to utilize laser beam to record information to technology in the CD.
Background technology
In the CD that appends of the rewritable CD of DVD-RAM, DVD-RW, CD-RW etc. and DVD-R, CD-R etc., with laser radiation to the record surface of dish and recorded information.As the illuminating method that on the record surface of CD, forms the laser that record mark uses, there is such irradiation such as CD-R to have that to form the method, DVD-RAM etc. of record mark like that driving by the pulse in the record mark forming process is made as with the recording impulse of the length time corresponding width of record mark, controls the heat storage and form the method etc. of best titime mark.The waveform of the recording impulse of this record mark of optimization is called 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 (below, only be designated as DVD-RAM).Write-in policy when representing 11T (T is the recording clock cycle) label record among the figure.As shown in the figure, the write-in policy of DVD-RAM is by the front end pulse that defines by TSFP, TEFP, TFP, by the repetition pulse (being also referred to as multiple-pulse) of TMP definition and the terminal pulse formation that defines by TSLP, TELP, TLP.In addition, the laser energy level is two-value or three values, but simple for explanation here, expression two-value situation.
This tactful front end pulse has " method of the absolute time of rising edge, negative edge end by TSFP, TEFP definition waveform " or " by the absolute time of TSFP, TFP definition rising edge and the method for burst length width " these two kinds of define methods.
" method that is defined the absolute time at each edge by TSLP, TELP " or " by TELP, the TLP definition absolute time of negative edge and the method for burst length width " these two kinds of define methods are also arranged in terminal pulse in addition.
For TELP as the back edge time location of the TSFP of the value of the time location of the leading edge of decision front end pulse and decision rear end pulse, by record mark length and before and after it gap length make its value change.This is caused by underlying cause: the heat storage that the laser during because of record mark causes and the influence of thermal diffusion are along with the length of record mark is different with its front and back length at interval.
Fig. 2 represents an example of the adjustment form of TSFP, TELP.3T, the 4T of the longitudinal direction of TSFP table, 5T, 〉=space length before 6T (more than the 6T) the expression record mark, the 3T of transverse direction, 4T, 5T, 〉=mark lengths of 6T (more than the 6T) expression record object.Equally, 3T, the 4T of the longitudinal direction of TELP table, 5T, 〉=space length after 6T (more than the 6T) the expression record mark, the 3T of transverse direction, 4T, 5T, 〉=mark lengths of 6T (more than the 6T) expression record object.Because the value in the adjustment form moves the edge by the write-in policy of TSFP, TELP decision, so these tables of following arrangement and be referred to as the displacement table.In addition, with the value of the edge timing of the wave recording of decision TSFP that Fig. 1 put down in writing etc. and above-mentioned couplings such as displacement table, below, be referred to as the recording parameters group.
Like this, the method that relation by record mark, gap length changes write-in policy not only can be used for DVD-RAM, also can be widely used among DVD-RW, the CD-RW of rewritable phase transformation system medium as other, in the DVD-R that can append the pigment medium, CD-R etc.
In the prior art, the medium fabricator is thought that optimum value under the on-line velocity certain condition records in the medium and the recording parameters group is provided.This is because owing to comprise the optimum value of the recording parameters group of the form of write-in policy of power level, timing and displacement table etc. and differ widely because of the composition of recording medium, material etc., so think that the medium fabricator advises that write-in policy is best.For example, in DVD-RAM, be arranged in physical format information (Physical formatinformation (the PFI)) zone in the control data zone (Control Data Zone) in the ingress area (Lead in area) of inner ring and write down above-mentioned recording parameters group.In addition, opening 2003-85753 communique, spy the spy opens and has put down in writing the prior art shown in above-mentioned in the 2002-260226 communique.
With exist to form on the recording medium, the situation of materials variances is identical, go up at optical disc recording apparatus (below be designated as " driver ") on aspects such as laser output power, circuit characteristic, also to there are differences.Therefore, the best titime parameter on the particular drive differs and is decided to be best titime parameter on other drivers.Especially, because the recording parameters that records in the media is the optimal parameter when writing down under specific linear velocity, so when the linear velocity except that this certain line speed recorded information on the recording medium, the recording parameters that records in advance in the media was not best.Therefore, when the linear velocity outside the linear velocity corresponding with the optimal parameter that records in advance write down, driver preferably determined the best titime parameter under this linear velocity.
But, carry out not having to consider to obtain the method for the best titime parameter of the linear velocity outside this specific linear velocity in the prior art in the driver of information record in the recording medium of the best titime parameter under having put down in writing certain line speed in advance in drive-side.
Summary of the invention
First purpose of the present invention provides the suitable determining method of the recording parameters that the medium fabricator provided and uses this recording parameters, obtains the method for the recording parameters under the linear velocity outside the linear velocity of medium 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 of record mark front end are proportional, and the hot memory space of record mark rear end and the square root of line speed record are proportional.In addition, the laser radiation power level that is applied to the energy of recording medium and per unit area by recording power, the laser radiation of power level of eliminating the regulation of power etc. is proportional, and is roughly proportional with writing speed.
But, at write-in policy not simultaneously, 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 the free-throw line speed that the simple interpolation (interpolation method, extrapolation) of the best titime parameter by being recorded in a plurality of linear velocities on the recording medium is in advance tried to achieve is not the best titime parameter usually.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 best titime parameter under each line speed record successively by simple interpolating method from different write-in policies, realize the problem of suitable variable-ratio record difficulty.
Though think when when CAV writes down, reaching the linear velocity of regulation at every turn, adopt the recording method of switching write-in policy, but when being to use this recording method, position in regulation is switched write-in policy suddenly, the aforementioned proportion relation becomes discontinuous as mentioned above, so in the front and back of switchover policy, even its shape of identical mark (for example being the 3T mark) is also different.Thus, during data reproduction after the write-in policy switching position, switch because of the characteristic of switching the record mark characteristic, produce the reproduction parameter of not following equilibrium, group delay etc., before and after the successively reproducing write-in policy switches, reproduce the problem of quality deterioration under the two regional situations.
Second purpose of the present invention is by guaranteeing the continuity of recording parameters group, guarantee the continuity of record 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 the irradiating laser pulse, on recording layer, form mark and recorded information, record identifying information, this identifying information has represented to write down roughly a plurality of controlled variable groups of proportional relation of the variation timing of the laser pulse power level that is used for the mark of record length more than the diameter of above-mentioned recording layer laser facula and line speed record.
In addition, passing through the irradiating laser pulse, on recording layer, form mark and the recording medium of recorded information, utilize to record the recording medium that determines by following step and improve: the step of first mark that writes down the above length of laser spot diameter of above-mentioned recording layer with first linear velocity for the controlled variable of each linear velocity; With the step of second linear velocity record with second mark of the same length of above-mentioned first mark; To reproduce above-mentioned first or the time width of the resulting electric signal waveform of second mark when being made as Tm with the linear velocity of regulation, the time location of the Tm/2 that begins with the leading edge from this waveform is as benchmark, obtain on time-axis direction before and after only at a distance of the Ts (step of the variable quantity of 2 the magnitude of voltage of Ts＜Tm/2) wherein; With the controlled variable of variation timing of the power level of decision laser pulse, make the also roughly certain step of this variable quantity when writing down with any linear velocity.
And, at following optical disc apparatus: have laser instrument to the CD irradiating laser, control the laser control device of this laser instrument, rotation drives the rotating driving device of above-mentioned CD, by with 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 is used for writing down the roughly controlled variable 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, carries out changing successively or by stages the continuous recording of line speed record.。
And, at following optical disc apparatus: have laser instrument to the CD irradiating laser, control the laser control device of this laser instrument, rotation drives the rotating driving device of above-mentioned CD, by with 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 uses the controlled variable of each linear velocity that is determined through the following steps, carries out changing successively or by stages the continuous recording of line speed record: the step of first mark that writes down the above length of laser spot diameter of above-mentioned recording layer with first linear velocity; With the step of second linear velocity record with second mark of the same length of above-mentioned first mark; To reproduce above-mentioned first or the time width of the resulting electric signal waveform of second mark when being made as Tm with the linear velocity of regulation, the time location of the Tm/2 that begins with the leading edge from this waveform is as benchmark, obtain on time-axis direction before and after only at a distance of the Ts (step of the variable quantity of 2 the magnitude of voltage of Ts＜Tm/2) wherein; With the controlled variable of variation timing of the power level of decision laser pulse, make the also roughly certain step of this variable quantity when writing down with 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 following the improvement, wherein, use is used to write down the roughly controlled variable 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, carries 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 calculate easily from the recording parameters that is provided by the medium fabricator is provided by the medium fabricator defines when carrying out the CAV record, can be calculated suitable recording parameters.
In addition, for drive maker, when realizing the high-speed record of being undertaken by the CAV record, can make the establishing method of write-in policy simple, the shortening of the learning time the when write-in policy that can realize the shortening of driver development time and driver is adjusted.
In addition, by in driver, also using step of the present invention, do not provide in the medium of the recording parameters that writes down corresponding to variable-ratio the medium fabricator, can obtain write-in policy and recording parameters yet corresponding to the variable-ratio record, and the variable-ratio record of realization CAV record etc.Further,, the medium of supporting the variable-ratio record can be differentiated easily, the write-in policy learning time when carrying out the variable-ratio record can be shortened by reference variable-ratio record mark.
Description of drawings
Fig. 1 is the mode chart of the 11T label record waveform of 4.7GB DVD-RAM.
Fig. 2 is the figure of an example of expression recording parameters control table.
Fig. 3 is example and its mode chart that the 10T mark reproduces waveform.
Fig. 4 is the mode chart of an example of the relation of expression writing speed and recording parameters.
Fig. 5 is example and its mode chart that 10T reproduces waveform at 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 adjusted 10T mark reproduces waveform.
Fig. 8 is the mode chart that expression 14T mark reproduces an example of waveform and sampling pulse.
Fig. 9 is the mode chart that expression 14T mark reproduces 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 is the mode chart of an example of the relation of expression writing speed and standard recording parameter.
Embodiment
Be that example illustrates first embodiment below with DVD-RAM.As previously described, in DVD-RAM, recording parameters is selected by the medium fabricator, is recorded in to dispatch from the factory after DVD-RAM goes up.
As present DVD-RAM standard, issued 2 times of speed (below be called " 2x ") record standard, 3 times of speed (below be called " 3x ") record standard, 5 times of speed of also predetermined issue (below be called " 5x ") record standard.That is,, consider to be provided at the recording parameters that also writes down on the 5x record respective disc (below be designated as the DVD-RAM5x medium) corresponding to 2x record, 3x record from guaranteeing the viewpoint with the compatibility of slave device.In addition, by using the recording parameters of each writing speed, can carry out inner lane in 5x record driver is the writing speed of 2x, and outmost turns is the CAV record of the writing speed of 5x.One example of the step of the recording parameters under the various writing speeds of representing below to write down among the decision DVD-RAM.
In the step 1, at first with the various writing speeds that provided, at this moment be the linear value of writing speed for the recording parameters group under 2x, 3x, the 5x situation is tentative.This be because, be the variable-ratio record of corresponding CAV record etc., need between the recording parameters that be provided and the writing speed for linear.
The long mark of step 2 reproduces the waveform adjustment and the master record linear-in-the-parameter is confirmed
In the step 2, use the long mark of tentative recording parameters more than record 6T under each writing speed that sets in the step 1, the reproduction waveform when relatively reproducing under the certain speed.
Usually, in the reproduction of CD, when the mark that reproduces more than or equal to spot diameter, the amplitude level of reproducing signal is saturated, and the generation of the waveform offset deviation that is caused by the difference of light spot shape is very little.Under the DVD-RAM of present embodiment situation, the diameter of the light beam during reproduction uses 0.86 micron light beam, so the amplitude that is equivalent to more than length and beam diameter 0.84 micron the 6T signal about equally is roughly certain.Therefore, the waveform under the long mark more than the 6T is carried out the initial adjustment of recording parameters as benchmark, afterwards, adjust and form the recording parameters that short mark is used.This reproduction speed also can be the minimum reproduction speed by the medium regulation.
Fig. 3 represents the reproduction waveform 301 of the long mark (10T) that writes down among the DVD-RAM under a certain writing speed.This figure is the example of 10T waveform, and the part that waveform is low is represented dark portion (labeling section).At reproduction speed is 2x, reproduces when the parameter of playback system is the canonical parameter of being put down in writing in the DVD-RAM standard.The right figure expression pattern of Fig. 3 is taken out left figure waveform.Here, with under 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 304 of the waveform of the minimum 303 of waveform of first half and latter half, calculate the slope A2x of the straight line 305 of the waveform position that links both.Also calculate the slope under 3x, the 5x writing speed, respectively it is made as A3x, A5x.The medium fabricator adjusts the recording parameters group of each speed when the recording parameters that decision is provided, make the value roughly certain (preferably in ± 10% scope) of A2x, A3x, A5x.
In addition, here, though 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 constitute and obtain from mark center, and adjust according to this slope only at a distance of the slope of the point-to-point transmission of predetermined distance.
For the recording parameters of recommending not carry out the adjustment of driver in the media standard (below, be referred to as the master record parameter), when this is adjusted, confirm its linearity for writing speed.Among the DVD-RAM of present embodiment Fig. 1 " TFP, TMP, TLP, TCL, TEFP, TSLP ", Fig. 2 " TELP when the above interval of 6T is followed in the TSFP when 6T follows above back, interval the above mark of 6T (Fig. 2 201), the above mark back of 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 on each recording parameters, to produce some errors by the definite step of recording parameters and the choice of numerical value.
Therefore, as shown in Figure 4, calculate the recording parameters value 404 of (3x during this example) on the speed that therebetween medium fabricator provides recording parameters the recording parameters value of being obtained from the recording parameters value 401 obtained by maximum recording rate (during this example 5x record) with by all time low speed (2x writes down during this example) 402, calculate the poor Δ Pt406 of 403 of the parameter values that write down for 3x under the above-mentioned speed obtained in this value and step 1, the step 2, this routine situation.
This Δ Pt is compared with the error permissible value of predefined relative each recording parameters,, then stop adjusting if Δ Pt is lower than the error permissible value.If during, depend on the adjustment that long mark reproduces the recording parameters of waveform once more greater than the error permissible value.As a result, when the linearity of the slope of each writing speed of the reproduction waveform of defined long mark and master record parameter does not satisfy rated condition in above-mentioned, can depend on the improvement of the recording medium of the composition of recording medium, the estimation of material etc.
Carrying out more simultaneously of the standard value that data t0 clock jitter when the condition of recording parameters extracts and reproduces with wave recording in addition, above-mentioned (following only be designated as shake), reproduction waveform are asymmetric etc.
Step 3 modulation displacement table, power level
In the step 3, after recording parameters is adjusted, carry out the adjustment of the recording parameters except that the master record parameter of being adjusted in the step 2 in each writing speed.In the present embodiment in the displacement table zone outside 201 of Fig. 2,202 and the adjustment of recording power level be equivalent to this.Have as method of adjustment reproduction is dithered as the method that minimizes etc., also can adopt as DVD-RAM defined method in media standard.
In addition, do not change adjusted master record parameter in the step 2 in the step 3.This is because the long mark that will preserve in the step 2 reproduces the shape of waveform and the linearity of recording parameters relative record speed.
In the step 4,, check the linearity of relative record speed for the recording parameters under each writing speed of being extracted out in the step 3.At this routine DVD-RAM,, confirm the linearity of its relative record speed for each the displacement table of TSFP, the TELP shown in each recording parameters shown in Fig. 1 and Fig. 2.
When in step 2, having guaranteed master record parameter linear, can set these recording parameterses, make each recording parameters relative record speed all retention wire sexual intercourse in theory.But, identical with step 2, have the error that causes by choice etc. owing to consider each recording parameters value, thus identical with step 2, each recording parameters is set the permissible error value, and confirm linear.
Also consider to form and material because of the film of recording medium, can not be by the selected suitable recording parameters of the adjustment that step 1-4 carries out.Because this medium are aspect the variable-ratio record of CAV record etc. corresponding difficulty being arranged, so be necessary to distinguish mutually with the satisfied recording parameters that depends on the adjustment of step 1-4.In the step 5, the determination flag of no record by the adjusted recording parameters of step 1-4 arranged, distinguish by expression is set.
For example, in the DVD-RAM standard, the 613 bit back that record in the PF11 sector of the recording parameters group that is provided by the medium fabricator are made as reservation (VB vacancy bit), here, distinguish by the described determination flag of setting a bit.
Driver confirms to have or not determination flag when medium insert, at bit is to be identified as variable-ratio at 1 o'clock to write down corresponding medium, in all time low speed and the writing speed between the maximum recording rate of medium, from the recording parameters that is provided by the medium fabricator, use described all time low speed and maximum recording rate are carried out recording parameters behind the linear interpolation, carry out record.When this routine DVD-RAM5x writes down corresponding medium, can calculate recording parameters under the writing speed of therebetween for example 2.5x, 3x, 4x etc. from the recording parameters that is provided being provided for 2x record and 5x by the medium fabricator.
By using the step 1-4 shown in the present embodiment, recording parameters when the writing speed except that the writing speed corresponding with the recording parameters that is provided by the medium fabricator can easily be provided from the recording parameters that the medium fabricator is provided, in the CAV record that changes writing speed gradually etc., when carrying out the continuous recording action, can calculate the best titime parameter usually.In addition, can guarantee high-quality CAV record by the CD of present embodiment, the user can carry out high-quality data recording at a high speed.
In addition, adopt the sign of step 1-4, whether can discern this recording medium corresponding to the CAV record by expression is set, confirming as when writing down corresponding to CAV, carry out the CAV record, do not correspond to CAV when record confirming as, can not carry out the suitable record controls of CAV record.In addition, concerning drive maker, when realizing the high-speed record that brings by the CAV record, the establishing method of write-in policy can be simplified, the shortening of the learning time when write-in policy is adjusted in the shortening of driver development time and the driver can be realized.
But, when adopting step 1-4 by assurances such as media standard, owing to whether do not need to discern this recording medium corresponding to the CAV record, so there is no need to be provided with above-mentioned mark.
Further, even during regional adjacent after writing down, also be consistent owing to reproduce the shape of waveform, so can carry out stable reproduction by different recording speed.
Second embodiment then is described.Though the present embodiment and the first embodiment same settings recording parameters are different with the step 2 of first embodiment.The following describes the step 2 of present embodiment.
The reproduction waveform of the long mark that the 6T that writes down though monitor each different recording parameters of operating speed in the step 2 of first embodiment is above, make the slope of this labeling section between each writing speed roughly consistent, but in the present embodiment relatively the above long mark of 6T reproduce waveform slope and with long spacer portion more than the 6T or with posting field not in the slope of reproduction waveform, decide the recording parameters of the best.
For example, if spacer portion as shown in Figure 5, for the center of the waveform 501 of spacer portion, is the zone, front and back of 5T part at 10T at interval the time, the slope that connects the straight line 504 of each regional peak value 502,503 is made as reference value Asp.Perhaps, measure any two interregional average potential in the track of posting field not, calculate the not waveform slope reference value Anw of posting field from this difference.For example, in DVD-RAM, as shown in Figure 6, calculate slope 601, be made as reference value Anw from average potential V61, the V62 of the n sector (m, n are arbitrary value) of the m sector, front and back in PID (Physical ID) zone.
Then, as asking among first embodiment, obtain slope Ax2, Ax3, the Ax5 of labeling section.In the present embodiment, the setting recording parameter, and make Ax2, the Ax3 of labeling section, Ax5 roughly consistent with slope, Asp, the Anw of spacer portion.Fig. 7 represents the reproduction waveform of actual adjusted labeling section.Identical with first embodiment, will be long the mark slope that reproduces the labeling section of waveform be made as central point 701, peak value 702,703 about it, when slope 704 relative each speed definition of being obtained are Ax2, Ax3, Ax5, as Fig. 7 704 shown in, adjust recording parameters, make the difference of these slope value Ax2, Ax3, Ax5 and Asp, Anw be roughly zero.
By carry out the adjustment of recording parameters by the step of present embodiment, compare with the long mark of first embodiment, the shape of mark approaches 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 then is described.In the present embodiment, the establishing method of recording parameters and variable-ratio record corresponding bit etc. are identical with first embodiment, but the linear confirmation method of the recording parameters in the step 2,4 is different with it.The following describes the step 2,4 of present embodiment.
In the step 2 of embodiment 1, the error of the recording parameters that will try to achieve by linear interpolation in first embodiment and the recording parameters obtained from the waveform slope condition of the long mark more than the 6T being reproduced waveform definition is compared with the error permissible value that presets, and carries out the judgement of the linearity formation of recording parameters.
In the step 2 of present embodiment, the maximum recording rate (during present embodiment be 5x record) of only obtaining medium down master record parameter (it is made as the master record parameter A) and the master record parameter (it is made as the master record B parameter) under all time low speed (2x writes down during present embodiment).To the master record parameter (it is made as the master record parameters C) that provides by the medium fabricator under the writing speed therebetween, from master record parameter A, B, obtain by linear interpolation.
If it is applicable to Fig. 4, then 401 is the master record parameter A, and 402 is that master record B parameter, 404 is the master record parameters C.Below, if reproduction speed, DVD-RAM for example by regulation then are reproduced in the zone of using basic parameter C to be write down in the adaptation writing speed of basic parameter C with 2x, obtain and reproduce shake.When at this moment the jitter value σ predefined regulation of institute when to allow a jitter value σ r be σ＜σ r relatively, stop adjusting, when σ＞σ r, identical with 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 that from the recording parameters of being obtained by the maximum recording rate and all time low speed of medium, provides by the media production person under the interpolation writing speed therebetween, relatively, confirm the linearity of recording parameters between the reproduction jitter sigma s by the result that will write down by this recording parameters and the permission jitter value σ rs of predefined regulation.
In the step of present embodiment, owing to the master record parameter and other recording parameterses that do not need to extract out except that maximum recording rate, all time low speed, 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 medium 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 provides by the medium fabricator and other recording parameterses, carry out interpolation by interpolation, extrapolation.
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 of treatment step of carrying out the driver of variable-ratio record on the dish of having put down in writing the recommendation recording parameters of a plurality of writing speeds.
Figure 11 represents the structure of the driver of present embodiment.In the driver of present embodiment, by being loaded in the laser driver (LDD) 112 on the light picker 110, come driving laser diode 111, from object lens 113 emission laser.Control this lasing fluorescence timing by the waveform parameter control part in the DSP105.In the present embodiment, though for Waveform Control portion is built in structure among the DSP, it also can be a chip separately and exclusively, also can be in addition it is loaded in structure on the LDD.
Reproducing signal by RF F/E LSI104, carries out waveform processing by the waveform obtaining section and the wave form analysis portion of DSP inside from light picker.In the waveform obtaining section, after obtained Wave data carried out the A/D conversion and be used as numerical data, deliver in the wave form analysis portion.In addition, microcomputer 106 also can directly be obtained data, and the part of waveform can be carried out wave form analysis by microcomputer.Further, there is variable-ratio record respective flag measuring ability in DSP inside, judges to have or not this sign.In addition, also can differentiate by microcomputer has no marks, and not necessarily needs to be positioned at DSP inside.
At first, confirm whether reproducing the variable-ratio record respective flag (step 1003) shown in the step 5 that records first embodiment on the object medium.For the medium of having set up variable-ratio record mark (being medium) corresponding to the variable-ratio record, with the recording parameters under in the media the certain line speed of record as the basis, obtain the value of the recording parameters under in addition the linear velocity by linear operation, carry out variable-ratio record (step 1004-1008).
Do not setting up the variable-ratio record mark, when perhaps not setting variable-ratio record mark itself, in the recording parameters that the medium fabricator who is write down in the media recommends, confirm to recommend in the driver not have the master record parameter of change and the linearity (step 1009) of writing speed.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, perhaps 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 medium on the limit, the variable-ratio record (step 1004-1008) of CAV record etc. is carried out on the limit.
Confirming not under the linear situation that the part of service recorder recording parameters is in the media extracted master record parameter and other recording parameterses (step 1010) out.
Step 3 depends on the extraction and the linear affirmation of the master record parameter of long mark waveform
Recording parameters under a plurality of writing speeds that use is provided by the medium fabricator writes down above long mark, the long interval of 6T under each writing speed.In the zone at these marks of record, interval, extract the reproduction waveform of the above long mark of 6T, identical with defined situation among first embodiment, the long mark when reproducing under the mensuration certain speed reproduces the slope of waveform.In its result, adjust the long mark more than the relative 6T, long recording parameters at interval, make the slope unanimity roughly of long mark reproduction waveform of each writing speed.This recording parameters is equivalent to the master record parameter of first embodiment.
Assay method as long mark reproduction waveform slope has following method: for example when DVD-RAM, extract the 14T as recessed pattern out in driver, as shown in Figure 8, reproduce waveform 801 for the 14T mark, the sampling pulse shown in the generation 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.The magnitude of voltage V1, the difference DELTA V of V2 that only calculate to keep the holding signal 804,805 during the curtain heading tape of sampling pulse 802,803, and with the slope of this value defined for long mark reproduction waveform.
In addition, as additive method, consider following method, as shown in Figure 9, for example will reproduce waveform 901AD conversion, and in resulting sampling series, the long mark of extracting regulation out reproduces waveform, is that 14T reproduces waveform when this example at reproduction clock period T, the mean value of calculating the sampling value 902,903 that equates number of samples in the part of only leaving the equal time width from the time centre of this long mark waveform is defined as the slope etc. that long mark reproduces waveform with the difference of resulting mean value.By said method, decide linear dimensions.
Further, in order to confirm,, after in fact writing down, confirm linear (step 1011) for the master record parameter of above-mentioned each writing speed that obtains.Affirmation can be used the method for the step 3 described in first and second embodiment etc.In this step, when not confirming master record parameter linear, adopt the means of the slope that turns back to the long mark reproduction of step 2 change waveform etc.Even like this, under the situation of the linearity of not confirming the master record parameter, also be made as the stabilized speed record (step 1013) of only implementing CLV record etc.
Preferred limit is carried out in the extraction of this master record parameter and is linearly confirmed, the standard value that the data t0 clock jitter of limit when reproducing wave recording (following only be designated as shake), reproduction waveform are asymmetric etc. compares.
After adjusting the master record parameter, in each writing speed, the recording parameters outside the master record parameter of being adjusted in the set-up procedure 2.At this moment, identical with first embodiment, the master record parameter that does not change in the step 2 to be adjusted.Though method of adjustment proposes that various gimmicks are arranged, also can adopt as defined method in the media standard of DVD-RAM etc.
For the recording parameters under each writing speed of being extracted out in the step 3, check the linearity of relative record speed.Because at this moment also the step 2 with the first embodiment of the present invention is identical, consider that each recording parameters value has the error that produces because of accepting or rejecting, thus identical with step 2, each recording parameters is set the permissible error value, confirm linearity.
In the driver that has used above-mentioned steps, has following advantage.
1. by with reference to the variable-ratio record mark, can differentiate the medium of supporting the variable-ratio record easily.
2. differentiating when supporting the medium of variable-ratio record, the write-in policy in the time of can carrying out the variable-ratio record of CAV etc. easily can shorten learning time of write-in policy.
3. do not support in the medium of variable-ratio record thinking, can prevent from advance the recording parameters that provides by the medium fabricator is provided and record when carrying out the variable-ratio record is not good by reference variable-ratio record mark.
Even by above-mentioned steps for not providing medium corresponding to the recording parameters of variable-ratio record by the medium fabricator, also can obtain write-in policy and recording parameters, and realize the variable-ratio record of CAV record etc. corresponding to the variable-ratio record.
In addition, by will remaining among for example EEPROM etc. of internal drive by this step resulting records parameter, when below same medium being inserted into driver, setting recording parameter fast, and the effect of recording parameters learning time of can being reduced etc.
In addition, in above-mentioned, can consider to change and to carry out the variable-ratio record by the recording parameters that the medium fabricator provides as the basis, and the recording parameters that will be provided by the medium fabricator is as the basis, use is by defined method of standard of medium etc., on driver, use the result who has learnt the best titime parameter, and replacement is carried out the variable-ratio record by the recording parameters that the medium fabricator is provided.
Then, the expression fifth embodiment of the present invention.In the present embodiment, identical for the establishing method of recording parameters, variable-ratio record degree corresponding bit etc. with first embodiment, but on step 2,4 the linear confirmation method of recording parameters, there are differences.The following describes the step 2,4 of present embodiment.
The feature of present embodiment is, in the step 2,4 of first embodiment, and when the parameter relative record speed of the time-axis direction information of confirming the regulation recording impulse linear, the value after recording clock uses this parameter of standardization in the cycle.For example, when being DVD-RAM, the recording parameters that becomes object is TFP, TMP, TLP, TCL, TEFP, TSLP, TSFP, TELP.
It is put in order as Tpr, and use Figure 12 to describe.The recording parameters value that to be tried to achieve by maximum recording rate (during this example be 5x record) in the cycle of recording clock under each writing speed (with it as Tpr5x), recording parameters value (with it as the Tpr2x) standardization of being tried to achieve by all time low speed (being that 2x writes down during this example) respectively, and these values are made as standardized recorded parameter value Tpr5xs, Tpr2xs.Carry out standardization by the formula (1) shown in following.
Tpr[n]xs＝Tpr[n]x/Tw[n].....(1)
[n] expression speed (writing speed) doubly in formula (1), Tw[n] expression n recording clock cycle under the speed doubly.By 1201 expression Tpr5xs, same on Figure 12, on Figure 12, represent Tpr2xs by 1202.
Calculate recording parameters value 1204 (it is made as Tpr3xs_1) after the speed that standardization medium fabricator provides recording parameters (this example is the 3x record) from it.Calculate the above-mentioned speed obtained in this Tpr3xs_1 step 1,2 identical, be the difference DELTA Tpr3xs 1206 of the standardized recorded parameter value Tpr3xs behind the parameter value (it is made as Tpr3x) of through type (1) standardization 3x record (Figure 12 1203) under this routine situation with the step shown in first embodiment, the adjustment of the relatively permissible error value of its predefined relatively standardized recorded parameter, and judgement stops.
The validation of information linearity of the time-axis direction of recording impulse that thus can be by not relying on writing speed is more easily guaranteed linearity.
In addition, in the present embodiment, though using the difference of standardized recorded parameter value to compare with the permissible error value, but also can make the Tpr3xs_1 that is obtained in above-mentioned get back to former temporal information Tpr3x_1 by following formula (2), and calculate it and do not have the difference DELTA Tpr3x of standardized above-mentioned Tpr3x, relatively the error permissible value of its predefined relatively recording parameters is judged to adjust to stop.
Tpr3x_1＝Tpr3xs_1×Tw[3]......(2)
Embodiment 6
Then represent the sixth embodiment of the present invention.The establishing method of recording parameters and variable-ratio record corresponding bit etc. is identical with the 3rd embodiment in the present embodiment, but the linear confirmation method of the recording parameters in the step 2,4 exists different.The following describes the step 2,4 of present embodiment.
Present embodiment is characterised in that, in the step 2,4 of the 3rd embodiment, when the parameter relative record speed of the information of the time-axis direction of confirming the regulation recording impulse linear, uses the value after recording clock cycle this parameter of internal standardization.In the described method of described the 5th 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.Confirm the linearity of recording parameters the comparison of the reproduction jitter sigma s of result after writing down and predefined regulation permission jitter value σ rs by the recording parameters Tpr3x_1 that obtains like this.
Thus, the validation of information linearity of the time-axis direction of recording impulse that can be by not relying on writing speed is more easily guaranteed linearity.
The seventh embodiment of the present invention then is described.Be characterised in that at present embodiment: calculate under the situation of recording parameters when in the step 1 of the fourth embodiment of the present invention, carrying out the variable-ratio record, in calculating express time recording of information parametric procedure, carry out linear operation by the parameter after the recording clock cycle criterionization by the method use identical with the method shown in the fifth embodiment of the present invention.
In addition, when confirming recording parameters linear in the step 2-step 4 of the fourth embodiment of the present invention, in the linear process of the recording parameters of confirming the expression temporal information, it is characterized in that: use by the parameter after the recording clock cycle criterionization by the method identical and carry out the linearity affirmation with the method shown in the fifth embodiment of the present invention.
Thus, the validation of information linearity of the time-axis direction of recording impulse that can be by not relying on writing speed is more easily guaranteed linearity.
In addition, the above long mark of the 6T of the foregoing description, the long voltage that is meant the mark part of wanting to make the waveform when reproducing, compartment at interval are not subjected to the mark before and after it, mark, the gap length that the interval influences, and it can be defined as the mark more than a times of the laser spot diameter that focuses on the recording medium, at interval yet.For example, when the laser spot diameter with the DVD-RAM pen recorder was made as 1 micron, it was equivalent to the length of 7.14T.That is, also can use the above long mark of 8T, long interval to carry out above-mentioned all steps.
Claims (8)
1. optical disc apparatus, to the spike train that the recording layer irradiation of CD is made of front end pulse, multiple-pulse, terminal pulse, form length more than the diameter of the laser facula of recording layer mark and recorded information is characterized in that, this optical disc apparatus has:
Laser instrument to the CD irradiating laser, the information of variation timing as the power level of the described spike train of expression is recording on this CD in advance: be illustrated in second the changing clocking information and be illustrated in the 3rd of variation timing under the 3rd writing speed and change clocking information of variation timing that first of variation timing under first writing speed changes clocking information, is illustrated in second writing speed;
Control the laser control circuit of this laser instrument; With
Rotation drives the rotation driving circuit of described CD,
Described laser control circuit, use described first writing speed, described first change clocking information, described second writing speed, described second change clocking information from what described optical disc replay went out from what described optical disc replay went out, ask for the linear equation of the relation of expression writing speed and variation timing
Confirm whether the variation timing under the 3rd writing speed in the described linear equation converges on the error permissible value with the described the 3rd difference that changes clocking information that goes out from described optical disc replay, when converging on the error permissible value, use described linear equation to ask for variation timing under any writing speed
When the mark of record length more than the diameter of the laser facula of described recording layer, use the variation timing of trying to achieve from described linear equation, carry out changing successively or by stages the continuous recording of line speed record.
2. optical disc apparatus, recording layer to DVD-RAM shines the spike train that is made of front end pulse, multiple-pulse, terminal pulse, when the information clock period of will be write down is made as T, forms the above mark of 6T and recorded information, it is characterized in that this optical disc apparatus has:
Laser instrument to the DVD-RAM irradiating laser, the information of variation timing as the power level of the described spike train of expression is recording on the DVD-RAM in advance: be illustrated in first of variation timing under first writing speed and change clocking information, be illustrated in second of variation timing under second writing speed and change clocking information and be illustrated in the 3rd of variation timing under the 3rd writing speed and change clocking information;
Control the laser control circuit of this laser instrument; With
Rotation drives the rotation driving circuit of described DVD-RAM,
Described laser control circuit, use described first writing speed, described first change clocking information, described second writing speed, described second change clocking information from what described DVD-RAM revealed again from what described DVD-RAM revealed again, ask for the linear equation of the relation of expression writing speed and variation timing
Confirm whether the variation timing under the 3rd writing speed in the described linear equation converges on the error permissible value with the described the 3rd difference that changes clocking information that reveals again from described DVD-RAM, when converging on the error permissible value, use described linear equation to ask for variation timing under any writing speed
When the mark of record more than the 6T, use the variation timing of trying to achieve from described linear equation, carry out changing successively or by stages the continuous recording of line speed record.
3. optical disc apparatus according to claim 1 and 2 is characterized in that:
Described the 3rd writing speed is faster than described first writing speed and second writing speed,
Described linear equation is tried to achieve by the interpolation of using extrapolation.
4. optical disc apparatus according to claim 1 and 2 is characterized in that:
Described the 3rd writing speed is slower than described first writing speed and second writing speed,
Described linear equation is tried to achieve by the interpolation of using extrapolation.
5. the recording method of a CD, to the spike train that the irradiation of the recording layer of CD is made of front end pulse, multiple-pulse, terminal pulse, form length more than the diameter of the laser facula of recording layer mark and recorded information is characterized in that,
First of the variation timing that is illustrated under first writing speed from the information and recording in advance as the variation timing of the power level of the described spike train of expression changes clocking information, be illustrated in second of variation timing under second writing speed changes clocking information and is illustrated in the CD that the 3rd of variation timing under the 3rd writing speed changes clocking information, reproduce described first, second, third and change clocking information
Use described first writing speed, described first change clocking information, described second writing speed, described second change clocking information from what described optical disc replay went out from what described optical disc replay went out, ask for the linear equation of the relation of expression writing speed and variation timing
Confirm whether the variation timing under the 3rd writing speed in the described linear equation converges on the error permissible value with the described the 3rd difference that changes clocking information that goes out from described optical disc replay, when converging on the error permissible value, use described linear equation to ask for variation timing under any writing speed
When the mark of record length more than the diameter of the laser facula of described recording layer, use the variation timing of trying to achieve from described linear equation, carry out changing successively or by stages the continuous recording of line speed record.
6. the recording method of a CD, the spike train that is made of front end pulse, multiple-pulse, terminal pulse to the irradiation of the recording layer of DVD-RAM when the information clock period of will be write down is made as T, forms the above mark of 6T and recorded information is characterized in that,
First of the variation timing that is illustrated under first writing speed from the information and recording in advance as the variation timing of the power level of the described spike train of expression changes clocking information, be illustrated in second of variation timing under second writing speed changes clocking information and is illustrated in the DVD-RAM that changes clocking information than the 3rd of the variation timing under the 3rd writing speed and reproduce described first, second, third variation clocking information
Use described first writing speed, described first change clocking information, described second writing speed, described second change clocking information from what described DVD-RAM revealed again from what described DVD-RAM revealed again, ask for the linear equation of the relation of expression writing speed and variation timing
Confirm whether the variation timing under the 3rd writing speed in the described linear equation converges on the error permissible value with the described the 3rd difference that changes clocking information that reveals again from described DVD-RAM, when converging on the error permissible value, use described linear equation to ask for variation timing under any writing speed
When the mark of record more than the 6T, use the variation timing of trying to achieve from described linear equation, carry out changing successively or by stages the continuous recording of line speed record.
7. according to claim 5 or 6 described recording methods, it is characterized in that:
Described the 3rd writing speed is faster than described first writing speed and second writing speed,
Described linear equation is tried to achieve by the interpolation of using extrapolation.
8. according to claim 5 or 6 described recording methods, it is characterized in that:
Described the 3rd writing speed is slower than described first writing speed and second writing speed,
Described linear equation is tried to achieve by the interpolation of using extrapolation.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
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| JP2003129677 | 2003-05-08 | ||
| JP2003-129677 | 2003-05-08 | ||
| JP2003129677 | 2003-05-08 | ||
| JP2003-329289 | 2003-09-22 | ||
| JP2003329289A JP4154304B2 (en) | 2003-05-08 | 2003-09-22 | Recording medium, optical disc apparatus, and recording method |
| JP2003329289 | 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 CN1967671B (en) | 2014-03-26 |
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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 |
| JP3762847B2 (en) * | 1999-04-13 | 2006-04-05 | 株式会社日立製作所 | Information recording method and information recording apparatus |
| JP2001297436A (en) * | 2000-04-12 | 2001-10-26 | Ricoh Co Ltd | Information recording method, information recorder and information processor |
| US6459666B1 (en) * | 1999-09-06 | 2002-10-01 | Ricoh Company, Ltd. | Information recording apparatus and method |
| 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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