CN100442362C - Optical disc recording control method and optical disc recording control apparatus - Google Patents

Abstract

Before data is recorded in an optical disc, an optimum recording power is calculated in an inner peripheral part and in an outer peripheral part of the optical disc based on OPC learning. Before the data is recorded in the optical disc, the optimum recording power is calculated in at least an intermediate part between the inner peripheral part and the outer peripheral part of the optical disc based on the OPC learning. Then, a correlation between position shift amounts in the inner peripheral part, the outer peripheral part and the intermediate part along a radial direction of the optical disc and the optimum recording powers calculated in the respective parts is calculated. The optimum recording power in a current recording part is set based on the correlation when the data is recorded, and laser drive control is executed with the set optimum recording power so that the data is recorded in the optical disc.

Description

Optical disc recording control method and optical disc recording control apparatus

Technical field

The present invention relates to and control to record interior relevant record control method and the recording control apparatus of CD write operation of groove.

Background technology

Now, CD, for example compact disk (CD) and digital universal disc (DVD) are the main flow recording medium of the information of recording video information, audio-frequency information and other various forms therein, and this is because can have obtaining at a high speed the data wanted with high density recording and in CD.

The CD that only is used to reproduce has the uneven part that is called as hole (pit) on the track that is formed spiral-shaped or concentric shape on its substrate.Follow track from the laser that laser diode sends, survey by photodiode from the reflection ray in hole, and read the information that writes down on the CD according to catoptrical intensity thus.

Simultaneously, on optical disk of recordable type, on the reflection horizon, form recording layer.The example that can carry out the CD of groove record is DVD-R, DVD+R, DVD-RW, DVD+RW etc.

Board structure and record/read method referring to the CD of Figure 24 declare record type.Figure 24 illustrates the reflection horizon of substrate of CD and the part of recording layer.91 expressions wherein do not have the recording layer of recorded information, the recording of information layer has wherein been write down in 92 expressions, 93 expression reflection horizon, 94 expression incident lasers, 95 expressions are from the reflected light of the laser of the recording layer 91 that does not wherein have recorded information, and 96 expressions are from the reflected light of the laser that has wherein write down recording of information layer 92.In the example that illustrates in the drawings, pass reflectivity that the emission light 96 that wherein write down recording of information layer 92 is reflected and be higher than the reflectivity that the emission light 95 that passes the recording layer 91 that does not wherein have recorded information is reflected, its reason illustrates below.

Recording layer is formed on the reflection horizon in the optical disk of recordable type.Recording layer has such characteristic: its characteristic is changed by the radiation of high laser energy, and utilizes this characteristic so that information to be recorded on the CD.The change of recording layer character means the change of the absorptivity or the refractive index of laser.Along with the absorptivity increase of the laser in the recording section, when reproducing, the reflectivity of CD reduces.Further, when the refractive index of recording layer was changed, when reproducing, the Wavelength of Laser (phase place) of passing recording section was changed.As a result, it has provided in fact as the effect that has formed uneven part in reflective film.Come write information by the obvious reflectivity that changes from reflective film.If laser has the output level of the output level that equals recording operation when reproducing, when reading information, all can damage recorded content at every turn.Therefore, in reproduction, adopt the laser of output level with the output level that is lower than recording operation.

In optical disk of recordable type, the CD that only is used for writing down is once arranged and be used for rewritable CD.In the dish that only writes down once, the organic pigment of the nitrogenous cyanine dye of use family in the recording layer.When the laser emission of red visible light was to pigment, pigment had absorbed laser well.Therefore, changed significantly from the reflectivity of reflective film, and writing information thus.Because pigment material is by chemical modification, color is changed and can not gets back to its original state, thus can only recorded information once.In rewritable CD, used for example technology of phase-change recording, wherein utilized from the characteristic of the alloy of antimony and tellurium formation.In order to be described more specifically this characteristic, be formed under the situation of film shape that light can pass it with certain level at this alloy, be radiated at short notice on the alloy and after it is heated to the temperature of fusing environment at laser with strong energy, alloy is promptly falling into amorphous state after the cooling, and the alloy under the amorphous state is got back to its initial crystalline state when being heated with weak energy.

This alloy is mixed with germanium, and with the difference of absorptivity between amorphous state and crystalline state that causes laser, and further, this alloy is mixed with silver and indium, to cause the difference of refractive index between binary states.In other words, when when adding the thermosetting record pit at fusing point, recorded information is when its wipes information during by crystallization again.Because described change is ad infinitum repeatably, therefore in having the optical disk of recordable type of above-mentioned recording sheet, information is rewritable.

In the record controls of using CD of the laser of explanation like this, for writing information accurately, must the optimum recording laser energy of output.Because there is variation in each optical disc recording medium to the sensitivity of laser, so the optimum recording laser energy among each Zhang Guangpan is different.Further, when recorded information, the sensitivity temperature influence.Therefore, must be by using laser recorded information to obtain optimum laser energy information in suitable mode in the reality.

Along with the increase of quantity of information to be processed, require recording medium to satisfy the density needs higher than the density in the routine techniques.In order to satisfy this needs, the record format of CD various modifications have been carried out.An example of revising is, by making the narrowed width of track, or the hole of track narrowed down wait method with high density recording information in CD.In such recording method, in the track on being formed on the substrate of CD, make swinging chute part (thin groove) and swinging plane (land) part in pairs, read accuracy in the address information and the control CD accuracy in rotating with improvement.Planar section is formed between the slot part.Paired slot part and planar section become spiral-shaped or concentric shape from the innermost circumferential outmost circumferential of CD.This recording method is published in the unsettled announcement of Jap.P. (not examining Japan patent applicant announce H10-293926).

Figure 25 illustrates the record format according to the slot part and the planar section of routine techniques.Figure 26 illustrates the data structure in the CD.Slot part 11 swings recorded information with the swinging signal with preset frequency composition, and the planar section 12 that provides between adjacent slot part 11 is formed the spiral-shaped or concentric shape on the CD.Further, have that pre-hole (pre-pit) 13 that carve is formed in the planar section 12 on the plane with the swinging signal predetermined phase relation.Supplementarys are represented in the pre-hole 13 of carving on the plane, for example are used for the address information of record data.

In the CD with the record format shown in Figure 25 and Figure 26, wherein the slot part 11 of record data is divided into each synchronization frame as message unit in advance.Then, synchronization frame is formed the record sector, and error-correcting code is formed in the record sector.Suppose that the unit length corresponding to the hole spacing of the record format appointment when the record data is T, the length of a synchronization frame is 1488T, and the part that has 14T length in the head in synchronization frame is used as the synchronizing information 19 of each synchronization frame synchronously.

For the pre-hole 13 of carving on each synchronization frame record plane.Represent that the pre-hole 13 of carving is formed on and writes down on the regional adjacent planar part of synchronizing information in each synchronization frame on the plane of the synchronizing signal in the pre-information (pre-information).Further, can form pre-hole 13, the content of the pre-information of indicating to be recorded of carving on one or two plane in some cases.

In having the information on the CD of recording of aforementioned record format, pre-phase place of carving the hole signal on the pre-plane of detecting of carving the hole on the signal phase of the swinging signal phase place of being responsible for extracting from slot part and the plane from planar section is compared mutually, and output phase difference signal as a result based on the comparison.Then, adjust clock signal phase based on phase signal.More specifically, carve the variation that the adjustment axle of the clock signal that produces based on the swinging signal that is subjected to inevitably from the influence of cross (talk) has been corrected in the hole with pre-on the plane that is not subjected to any influence from cross (talk).Therefore, can produce accurately and the clock signal that is used to write down that CD rotation is synchronous, thus and recorded information accurately.In DVD+R, DVD-R, DVD+RW, DVD-RW, by the radiation record data of laser spots on slot part.

On having it, formed in the CD of track of the swinging chute part together of spiral-shaped or concentric shape of explanation like this and planar section, for record data must be determined optimum recording laser energy.When routine is determined optimum recording laser energy, before the real data record, the inside and the test in the outermost circumference at CD write (PCA zone: carry out the test write operation that wherein changes the record peak energy the energy calibration zone), so that determine to be suitable for the recording laser energy of each dish in each coils, zone.This is called OPC study (OPC: optimal energy control) hereinafter.In OPC study, when the record peak energy is changed in the circumference of the inside of dish, the physical record test data reads the signal of the test data that is write down, and measures the β value of the RF signal (scrambling of the degree of depth in the hole that the expression laser energy writes in CD) that is read.Thereby, checked the state in the zone of indicator, and determined to be suitable for most the recording laser energy of CD based on check result.Provide the further detailed description of OPC study referring to Figure 27 A-27C.

Among Figure 27 A-27C each illustrates the method for determining optimum record energy in the OPC study.At first, as shown in Figure 27 A, when progressively changing peak energy, carry out test record, and based on the β value from the RF calculated signals CD of the data read that write.Can adopt the expression formula shown in Figure 27 B to calculate the β value of the CD in the test record with random pattern.In this expression formula, the peak value of the RF signal that the data that peak value is represented to write from test record are obtained, the bottom value of the RF signal that the data that floors is represented to write from test record are obtained, all mean value of the RF signal that obtains of the data that from test record, write of value representation.Figure 27 C illustrates the relation between laser energy and the β value.In the expression formula shown in Figure 27 B, calculated β value, and definite β value is that 0 o'clock laser energy is optimum recording laser energy corresponding to several laser energy samples.

The actual in a different manner optimum recording laser energy of determining in the preceding method that used in CLV (invariant line speed) record and CAV (not variable angular velocity) record.CLV is a kind of axle control with constant linear velocity rotary CD, and CAV is a kind of axle control with constant rotational speed rotary CD.In CLV because linear velocity is constant, on the inside and outermost circumference of CD, in the time per unit on the CD distance of process equate, therefore, inside and write down constant in energy in the outermost circumference.Usually in the recording operation of relevant DVD, adopt the CLV record.In the CLV record, in the PCA zone of CD, carry out OPC study, and determine optimum record energy.Then, from the inside circumference of CD to the outermost circumference with identical record energy executive logging operation.In CAV record because rotational speed is constant, on the inside and outermost circumference, time per unit through being different apart from (being exactly linear velocity).Because linear velocity increases gradually towards the outermost circumference, optimum record energy also increases towards the outermost circumference naturally.

The CAV record of explanation routine here.Among Figure 28 A-28B each illustrates the routine of optimum record energy and calculates.Figure 28 A illustrates the place of carrying out OPC in the conventional CAV record.Usually, in CAV record, carry out OPC in PCA zone in the inside circumference and the PCA zone in the outermost circumference and learn.Then, as shown in Figure 28 B, calculate optimum record energy meter, and come the executive logging operation by changing the record energy in proper order based on optimum record energy meter by linear-apporximation.

Figure 29 illustrates the block diagram that is used for according to the structure of the optical disc recording control apparatus of routine techniques executive logging control.Mark 21 expression shaven heads.Shaven head 21 comprises the laser diode that is used for to CD 20 emission laser, be used to survey from the photodetector of CD 20 laser light reflected and have the pre-light at quarter (pre-light) that is used to receive laser pre-quarter the light photodetector optical signal processing circuit.22 expressions are used for surveying the RF signal sensor from the RF signal content of the signal that produces in bare headed 21 optical signal processing circuits that are equipped with.23 expressions are used for calculating expression with the β value counter of laser energy in the β of the scrambling of the degree of depth in the hole that CD 20 writes value.24 expressions are used for the optimal energy counter based on the optimum laser energy of property calculation of the result of calculation of β value counter 23 and CD.The storer of 25 expression storage OPC learned addresses and OPC learning outcome.50 expressions are used for the approximate within and without of 2 linearities of the OPC learning outcome of within and without circumference and put linear interpolater.27 expressions are used for the laser driving apparatus based on the drive current of the optical signal processing circuit of result of calculation control shaven head 21 outfits of optimal energy counter 24.The 30 expression focuses and the servo unit that tracks, be used for producing focus and tracing signal from detecting from the reflected light of CD and the signal of exporting by the photodetector of bare headed 21 optical signal processing circuits that are equipped with, based on the optical signal processing circuit that is equipped with in focus and the tracing signal control shaven head 21, and carry out the focus and the control that tracks.51 expressions are used for determining that the inside and outermost circumference carry out the PCA position determination unit of the position that OPC learns.28 expressions are used for the bare headed mobile unit of mobile optical signal processing circuit.

Referring to the conventional method that adopts the optical disc recording control apparatus recorded information shown in Figure 29 in the flowchart text of Figure 30 CD shown in Figure 25.

Before the video disc recording data, carry out test record (n10).At first, in the OPC study in the PCA zone in the inside circumferential section (n11), carry out test record, thus under the state that the record peak energy is progressively changed in CD recorded information.Then, laser is radiated the part of having carried out test record once more.Received by photodetector from the laser of CD reflection, and the reflected light that receives is converted into electric signal.Then, the electric signal from RF signal sensor 22 extracts RF composition (n52).Based on the RF composition that extracts, the degree of depth in the hole 18 that writes in the CD etc. is detected by β value counter 23.Then, calculate the relation between the characteristic that writes down energy and disk medium, to obtain β value (n53).In optimal energy counter 24, based on the record energy (n54) that be suitable for this video disc recording of β value calculating in test process of β value counter 23 calculating.During optimum record energy in having determined the inside circumferential section, control bare headed mobile unit 28, thereby laser spots moves to the PCA zone in the outermost circumferential section.Then, carry out the relevant optimum record energy (n12) of OPC study and calculating there once more.At this moment, the optimal energy of OPC learned addresses and calculating is stored in the storer 25.

Next step determines the optimum record energy (n13) in the current record part.Read in each OPC learned addresses calculated the step of front and optimum record energy (n101) in relevant place from storer 25.Approximate by 2 linearities based on the data processing that reads the learning outcome in the circumferential section of the inside and the learning outcome in the outermost circumferential section, to calculate the optimum record energy (n102) in the current record part.At last, start CAV record (n14) based on the optimum record energy in the current record part of calculating.

At present, in the record controls of CD, advancing high-speed record, and high speed CAV record is the main flow in video disc recording field always.Yet in conventional method, optimum in the center section in the radial direction of CD record energy is just based on the OPC learning outcome calculating in the inside and the outermost circumferential section.Therefore, change if the characteristic of optical disc surface exists, the record of the optimum in Pan the center section in the radial direction energy will depart from the value of wanting so, thereby worsens recording quality.Produced shortcoming like this, for example,, perhaps may worsen the compatibility of the driver made from other company because the deterioration of PI error rate may get access to wrong address.In recent years,, for example have the CD of tetchiness, big film thickness and big surface deformation because have the CD of clumsy quality in a large number, commercialization in CD market, it is more sharp-pointed that this problem has become.

Summary of the invention

Therefore, fundamental purpose of the present invention is to realize high quality record by the optimum recording laser energy that employing is suitable for optical disk property.

In the present invention, in the center section in the radial direction of this CD, sequentially carry out OPC study, to determine the optimum recording laser energy program in the CAV record from the inside circumferential section of this CD to outer peripheral part.

A kind of according to optical disc recording control method of the present invention, comprising:

In CD, before the record data, learn, calculate optimum record energy based on the inside circumferential section of this CD and the optimal energy control OPC of outer peripheral part and at least one center section between this inside circumferential section and outer peripheral part; With

Based on this inside circumferential section, outer peripheral part and the center section mutual relationship between the position offset in the radial direction of this CD and the optimum record energy that in this various piece, calculates optimum record energy in the current record part is set, comes to these data of this video disc recording to carry out Laser Driven control by the optimum record energy that adopts this setting.

Preferably, this CD has track, and this track comprises slot part and planar section, and calculates the optimum record energy in this planar section in this center section.

This slot part provides and is used for being recorded in the zone that is clipped in by the information in the disk area (data area) of the center section in the middle of the inside circumferential section of this CD (PCA zone) and the outer peripheral part (PCA zone) in fact.On the other hand, this planar section is the zone with supplementary of the address information that for example is used to write down these data.In the present invention, not only in this inside circumference and outside circumference, also in as the center section (preferably, planar section) of this data area, carry out this OPC study.As a result, can write down this data, so that realize this CAV record in high quality with the optimum laser energy that is suitable for this optical disk property.OPC study in this center section is preferably carried out in this planar section.Therefore, it can be applied to the DVD of R-system, and in the DVD of R-system, because this has the physical characteristics of organic dyestuff, these data can only be write once.

An embodiment is arranged in this aforesaid record control method, wherein, carry out at least one zone in the inside of this CD circumference, outside circumference and center section before the OPC study, whether detection any surface damage occurs in the part of this CD execution OPC study, for example impression of the hand or scuffing, thus shaven head is moved to any position that does not have surface damage.In the case, owing to can be selectively not have the zone of the surface damage of impression of the hand for example or scuffing to carry out this OPC study,, prevent that perhaps this OPC study fails so can carry out this OPC study with high precision at this.As a result, can determine this optimum record energy more accurately, this has guaranteed high quality record.

A kind of according to optical disc recording control apparatus of the present invention, comprising:

Shaven head is used for data recording to CD;

OPC learned addresses determining unit, be used for before these CD record data, determine to become the position in the radial direction of outer peripheral part mid-game of position in the radial direction, this CD of the inside circumferential section mid-game of this CD of OPC learning objective and the position in the radial direction of the center section mid-game between at least one this inside circumferential section and the outer peripheral part;

The shaven head mobile unit is used for this shaven head is moved to this inside circumferential section, outer peripheral part and center section respectively, and shaven head is determined by this OPC learned addresses determining unit in the position in the radial direction of dish;

The optimal energy counter, be used for from the shaven head emission that moved to this inside circumferential section, outer peripheral part and center section respectively and in the information of the scrambling of this optical disk property of expression that comprises from the laser of this CD reflection thereafter, the optimum that calculates in this inside circumferential section, outer peripheral part and the center section writes down energy;

Storer is used for storing this inside circumferential section, outer peripheral part and the center section determined by this OPC learned addresses determining unit along the position offset of the radial direction of this CD and the mutual relationship that is write down by the optimum in this various piece of this optimal energy counter calculating between the energy;

The record energy controller is used at record during these data, and the optimum record energy the current record part of this CD is set based on the mutual relationship that reads from this storer; With

Laser driving apparatus is used at record during these data, when the optimum in the current record partly of this CD of the value of setting control by this record energy controller writes down energy, via this shaven head this data recording to this CD.

According to this structure, before these data of record, mutual relationship and the optimum record energy carried out between the part (address) of this dish of this OPC are stored in this storer.This OPC study is not to carry out with the order of this inside circumferential section → center section → outer peripheral part, but can carry out with random order.When these data of record, this record energy controller writes down energy based on the optimum that the mutual relationship of storing in this storer is provided with in this current recording section, and based on this this laser driving apparatus of value of setting control, so that write down this data.As a result, can write down this data, and realize this high-quality CAV record with the optimum laser energy that is suitable for this optical disk property.

This optical disc recording control apparatus preferably further comprises:

The RF signal sensor is used for surveying the RF signal that the signal that detects of this laser comprises; With

β value counter is used for representing from the RF signal measurement that is detected by this RF signal sensor the β value of the scrambling of this optical disk property, wherein

This optimal energy counter is treated to the β value of being measured by this β value counter the information of the scrambling of this optical disk property of expression.

Thereby this optimal energy counter is provided with the optimum record energy in the part of carrying out this OPC study based on this β value (scrambling of the intensity in the record data in this CD of laser is used in expression).

This optical disc recording control apparatus preferably further comprises groove record energy correction device, and wherein this groove writes down the optimum record energy in the slot part that energy correction device is this center section to the record of the optimum in the planar section of this center section that is calculated by this optimal energy counter energy correction.

When these data of record in this slot part, a purpose of the test record in this center section (planar section) is to calculate this optimum record energy.When the record in the record in this planar section and this slot part is equal to each other, not to proofread and correct this optimum record energy.Yet,, in some cases, have error between optimum record energy that obtains in the test record in this planar section and the optimum record energy when these data of record in this slot part because the shape of this planar section and slot part is different.Therefore, provide this groove record energy correction device, consequently proofread and correct the optimum record energy that calculates in the OPC study in this planar section, thereby can improve the accuracy that is provided with of this optimum record energy.

This optical disc recording control apparatus further comprises plane/groove corrector, wherein this plane/groove corrector correction is by the optimum record energy in the planar section of this center section of this optimal energy counter calculating, to eliminate by the laser of radiation imposes on any influence of the slot part adjacent with this correlation plane part in order to obtain the optimum record energy in this planar section.

When carrying out this OPC study in this planar section, thereby the slot part adjacent with this planar section is subjected to no small influence inevitably.Therefore, the optimum record energy that correction is calculated by this optimal energy counter consequently imposes on the influence of this slot part by this plane/groove corrector elimination by the study of the OPC in this planar section.Thereby, can this optimum record energy be set with high precision more.

This optical disc recording control apparatus preferably further comprises:

RF signal level anomaly detector is used for when this optimal energy counter calculates this optimal energy, survey whether produce in the level of the RF signal that detects by this RF signal sensor unusual; With

Planar section learned addresses corrector is used for detecting when unusual when this RF signal level anomaly detector, and correcting detection is to the position in the radial direction of this unusual dish, wherein

This shaven head mobile unit moves to the position in the radial direction of the dish of being proofreaied and correct by this planar section learned addresses corrector to this shaven head, and

This optimal energy counter from expression be moved on the correction position in the radial direction of this dish the shaven head emission and in the information of the scrambling of this optical disk property that from the laser of this CD reflection, comprises thereafter, recomputate each this locational optimum energy that writes down in the radial direction of dish.

The level of this RF signal can illustrate unusual that this surface damage owing to impression of the hand in the center section of for example carrying out this OPC study or scuffing occurs.Under these circumstances, proofread and correct to carry out the position (address) of the part of this OPC study, and carry out this OPC study once more, so that can determine this optimum record energy, thereby obtain this higher-quality record with high precision more.

This optical disc recording control apparatus preferably further comprises:

Whether β value anomaly detector is used for when this optimal energy counter calculates this optimal energy, survey the β value of being calculated by this β value counter and produce any unusual; With

Planar section learned addresses corrector is used for detecting this when unusual when this β value anomaly detector, and correcting detection is to the position in the radial direction of this unusual dish, wherein

This shaven head mobile unit moves to this shaven head the position in the radial direction of the dish of being proofreaied and correct by this planar section learned addresses corrector; And

This optimal energy counter by the locational shaven head emission in the radial direction of the dish that is moved to this correction and in the information of the scrambling of the optical disk property that comprises thereafter, recomputates each this locational optimum energy that writes down in the radial direction of dish from expression from this laser of this CD reflection.

This β value can illustrate in the center section of carrying out this OPC study because this surface damage of impression of the hand or scuffing unusual for example.Under these circumstances, proofread and correct this OPC learned addresses, and carry out this OPC study once more, so that can determine this optimum record energy, thereby obtain this higher-quality record with high precision more.

This record energy controller is preferably handled this mutual relationship by linear interpolation, so that thereby the optimum record energy in this current recording section to be set, or to handle this mutual relationship so that optimum record energy in this current recording section is set via least square method.Especially, handle this OPC learning outcome in each planar section via least square method, thus this inside circumference and outside circumference quilt linearly interpolation be simple expression formula P (x)=Ax+B.As a result, when producing this optimum record energy meter, can reduce the processing burden in the firmware, and realize the record of this more speed.

This optical disc recording control apparatus further comprises and further comprises error monitor, is used in the process of these data of record anyly when causing this record interruption wrong when producing, and interrupts this record, wherein

This shaven head mobile unit moves to this shaven head the position in the radial direction of the dish that produces this mistake;

This optimal energy counter from expression by the locational shaven head emission in the radial direction that is moved to the dish that produces this mistake and in the information of the scrambling of the optical disk property that from the laser of this CD reflection, comprises thereafter, calculate the locational optimum record energy in the radial direction of the dish that produces this mistake, and

This memory stores has added the locational optimum mutual relationship that writes down energy in the radial direction of the dish of this mistake of generation of being calculated by this optimal energy counter.As a result, can further improve this recording quality.

This optical disc recording control apparatus further comprises the addition record position sensor, is used for when in these these data of CD addition record, surveys the position in the radial direction of the dish of addition record position, wherein

This shaven head mobile unit moves to it to this shaven head on this addition record position of being detected by this addition record position sensor, position in the radial direction of dish;

This optimal energy counter from expression by being moved to the locational shaven head emission of this addition record and, calculating the locational optimum record energy of this addition record in the information of the scrambling of the optical disk property that from the laser of this CD reflection, comprises thereafter; And

This memory stores has added the mutual relationship of the locational optimum record energy of this addition record that is calculated by this optimal energy counter.

By finishing this work, before the addition record of this CD, the OPC that has carried out this planar section from this addition record position learns, and therefore, can reduce the time span of this OPC study, and can obtain this addition record with high-quality.

This optical disc recording control apparatus further comprises the fault localization device, be used for before calculating this optimum record energy based on the OPC study of this inside circumferential section, outer peripheral part and center section, survey in this inside circumferential section, outer peripheral part or the center section any surface damage whether occurs, preferably

This OPC address determining unit is when this fault localization device detects surface damage, the position in the radial direction of the dish of the position in the radial direction of the dish of the position in the radial direction of the dish of the inside circumferential section that detects this surface damage, outer peripheral part or center section, change into the position that surface damage do not occur.

By finishing this work, before this OPC study is carried out, check whether the part of carrying out this OPC study this surface damage of impression of the hand for example or scuffing occurs, so that this shaven head is moved to this part that does not have surface damage, thereby carries out this OPC study there.Therefore, can carry out this OPC study with high precision more and maybe can prevent this OPC study failure.As a result, can determine this optimum record energy more accurately with higher precision, and can finish this recording operation with high-quality.

In the present invention, sequentially carry out this test record in the center section between at least one this inside circumferential section and outer peripheral part, so that determine the optimum record energy of this CD.As a result, can carry out this recording operation with the optimum record energy that is suitable for this optical disk property, and can carry out this record with high-quality.

When carrying out this test record, be not in the slot part of preparing for this information that will be write down in fact, but in having the planar section of the supplementary of this address information for example, data can steadily be write without any difficult ground.

This optical disc recording control apparatus according to the present invention is used for control operation effectively, and in this control operation, it must obtain the characteristic of laser diode or the characteristic of CD in the optical disc recording control apparatus corresponding to high-speed record.

Description of drawings

These and other target of the present invention and advantage will become clear by the explanation of the following preferred embodiment of the present invention.Those skilled in the art will notice many benefits of not narrating in this instructions by realizing the present invention.

Fig. 1 is the skeleton view according to the part-structure on the substrate of the optical disc recording medium of the preferred embodiment of the present invention 1.

Fig. 2 is the block diagram that illustrates according to the structure of the optical disc recording control apparatus of preferred embodiment 1.

Fig. 3 is the process flow diagram that illustrates according to the operation of the optical disc recording control apparatus of preferred embodiment 1.

Fig. 4 A is the diagram of calculating according to the record of the optimum on preferred embodiment 1 current address energy.

Fig. 4 B is the diagram of calculating according to the optimum record energy of preferred embodiment 1 on this current address.

Fig. 5 is the block diagram that illustrates according to the structure of the optical disc recording control apparatus of the preferred embodiment of the present invention 2.

Fig. 6 is the process flow diagram that illustrates according to the operation of the optical disc recording control apparatus of preferred embodiment 2.

Fig. 7 is the block diagram that illustrates according to the structure of the optical disc recording control apparatus of the preferred embodiment of the present invention 3.

Fig. 8 is the process flow diagram that illustrates according to the operation of the optical disc recording control apparatus of preferred embodiment 3.

Fig. 9 is the block diagram that illustrates according to the structure of the optical disc recording control apparatus of the preferred embodiment of the present invention 4.

Figure 10 is the process flow diagram that illustrates according to the operation of the optical disc recording control apparatus of preferred embodiment 4.

Figure 11 is the block diagram that illustrates according to the structure of the optical disc recording control apparatus of the preferred embodiment of the present invention 5.

Figure 12 is the process flow diagram that illustrates according to the operation of the optical disc recording control apparatus of preferred embodiment 5.

Figure 13 is the block diagram that illustrates according to the structure of the optical disc recording control apparatus of the preferred embodiment of the present invention 6.

Figure 14 is the process flow diagram that illustrates according to the operation of the optical disc recording control apparatus of preferred embodiment 6.

Figure 15 A is the diagram of calculating according to the record of the optimum on preferred embodiment 6 current addresses energy.

Figure 15 B is the diagram of calculating according to the optimum record energy of preferred embodiment 6 on this current address.

Figure 16 is the block diagram that illustrates according to the structure of the optical disc recording control apparatus of the preferred embodiment of the present invention 7.

Figure 17 is the process flow diagram that illustrates according to the operation of the optical disc recording control apparatus of preferred embodiment 7.

Figure 18 is the block diagram that illustrates according to the structure of the optical disc recording control apparatus of the preferred embodiment of the present invention 8.

Figure 19 is the process flow diagram that illustrates according to the operation of the optical disc recording control apparatus of preferred embodiment 8.

Figure 20 is the block diagram that illustrates according to the structure of the optical disc recording control apparatus of the preferred embodiment of the present invention 9.

Figure 21 is the block diagram that illustrates according to the structure of the optical disc recording control apparatus of the preferred embodiment of the present invention 10.

Figure 22 is the process flow diagram that illustrates according to the operation of the optical disc recording control apparatus of preferred embodiment 10.

Figure 23 is the process flow diagram that illustrates according to this operation of the optical disc recording control apparatus of preferred embodiment 10.

Figure 24 is the sectional view of optical disk of recordable type.

Figure 25 is the skeleton view on the surface of optical disk of recordable type.

Figure 26 illustrates the data structure in the optical disk of recordable type.

Figure 27 A is the diagram that optimum record energy calculates in the OPC study.

The diagram that Figure 27 B calculates for optimum record energy in this OPC study.

The diagram that Figure 27 C calculates for optimum record energy in this OPC study.

Figure 28 A is the diagram of calculating according to the record of the optimum on routine techniques current address energy.

Figure 28 B is the diagram of calculating according to the optimum record energy of this routine techniques on this current address.

Figure 29 is the block diagram that illustrates according to the structure of the optical disc recording control apparatus of routine techniques.

Figure 30 is the process flow diagram that illustrates according to the operation of the optical disc recording control apparatus of routine techniques.

Embodiment

The preferred embodiments of the present invention are described with reference to the accompanying drawings.

Preferred embodiment 1

Fig. 1 is the skeleton view according to the part-structure on the substrate of the optical disc recording medium of the preferred embodiment of the present invention 1.In Fig. 1, mark 11 expressions are formed on the slot part for spiral or concentric shape on the CD.Slot part 11 is swing (crooked).The planar section that mark 12 expressions are clipped in the middle by slot part 11.The pre-hole of carving on the mark 13 expression planes, the pre-supplementary that is used for record data of carving hole typical example such as address information on the plane.The pre-hole 13 of carving has predetermined phase relation with respect to swinging signal on the plane.The pre-hole 13 of carving is provided in the planar section 12 on the plane.Mark 14 expression recording layers, the laser that its absorptivity or refractive index are output the recording laser energy changes.Mark 15 expressions are used to reflect the reflection horizon to the CD emitted laser.Mark 16 expressions are provided to heat resistanceheat resistant and wear-resistant protective seam.Mark 17 expressions illustrate the data recording hole of the data that will be written in the slot part 11 when executive logging is operated.Mark 18 illustrates the test record hole of test record in the OPC study.Protective seam 16 major requirements are satisfied for example heat resistanceheat resistant, are resistance to worn, adhesiveness and the such characteristic of intensity.Therefore, the resin of good strength, for example thermosetting resin, ultraviolet processing resin or electron irradiation are processed resin, are used as the principal ingredient of protective seam 16, in addition, preferably also comprise lubricant.

Fig. 2 is the block diagram that illustrates according to the structure of the optical disc recording control apparatus of preferred embodiment 1.Among the figure, mark 21 expression shaven heads.Shaven head 21 comprises optical signal processing circuit.Optical signal processing circuit has the laser diode that is used for to CD emission laser, be used to survey from the photodetector of the laser of CD reflection and be used to receive laser pre-quarter light light photodetector at pre-quarter.Mark 22 expression is used to survey the RF signal sensor of the RF signal content of the signal that produces from the reflected light that received by shaven head 21.Mark 23 expressions are used to calculate the β value counter of β value.The scrambling of the degree of depth in the hole that β value representation laser energy writes in CD.Mark 24 expressions are used for calculating based on the result of calculation of β value counter 23 the optimal energy counter of the optimum laser energy that is used for optical disk property.The storer of mark 25 expression storage OPC learned addresses and OPC learning outcome.Mark 26 is examples of record energy controller, and expression is used for calculating by the linear multi interpolation of carrying out approximate a plurality of OPC learning outcomes the record energy controller (linear multi interpolater) of the optimum record energy of current address.Mark 27 expressions are used for based on the laser driving apparatus of controlling the drive current of bare headed 21 optical signal processing circuits that are equipped with from the optimum record energy of record energy controller 26.The mark 30 expression focus/servo units that track are used to produce focus and tracing signal, by carrying out focal point control and the control that tracks based on the optical signal processing circuit that is equipped with in focus and the tracing signal control shaven head 21.Focus signal and tracing signal are produced by surveying the signal of exporting from the emission light of CD based on the photodetector in the shaven head 21 by the focus/servo unit 30 that tracks.Mark 31 expressions are used to judge whether the current positioned area of luminous point is the plane/groove judging unit of planar section or slot part.Mark 29 expression OPC learned addresses determining units are used for determining the position of carrying out OPC study of the center section between the inside circumferential section and the outermost circumferential section of the inside circumferential section of CD 20 and outermost circumferential section and at least one.Mark 28 expressions are used for moving the bare headed mobile unit of shaven head 21.

Explain operation below with reference to the process flow diagram shown in Fig. 3 according to the optical disc recording control apparatus of this preferred embodiment.Before carrying out record data, at first, carry out OPC study (S11) in the slot part 11 in the PCA zone in the inside circumferential section for CD with the structure shown in Fig. 1.In the OPC of S11 study, carry out test record, wherein progressively changing under the situation of record peak energy record data in CD (S51).Thereafter, get back to the zone of carrying out test record, photodetector receives the laser from CD reflection, and the reflected light that receives is converted into electric signal, and RF signal sensor 22 extracts RF composition (S52) from electric signal.β value counter 23 is surveyed the degree of depth in the test record hole 18 that writes etc. in CD based on the RF composition that extracts, thereby calculate the relation between record energy and the disk medium characteristic, so that obtains β value (S53).The β value that optimal energy counter 24 obtains based on β value counter 23 is calculated the optimum record energy (S54) of the record of the CD in being suitable for testing.The state that corresponds to each other with them of OPC learning outcome in the circumferential section of the inside (optimum record energy) and OPC learned addresses (position offset in the radial direction that is coiling) is stored in the storer 25.

During optimum record energy in having determined the inside circumferential section, the optical signal processing circuit in the control shaven head 21, thus laser spots is moved to planar section 12 in the center section as data area (S12).Carry out OPC study in the planar section 12 in center section once more, to calculate optimum record energy (S13).When finishing OPC study, the mode that the optimum record energy that calculates in OPC learned addresses in the center section (position offset in the radial direction of dish) and the relevant portion corresponds to each other with them is recorded in (S14) in the storer 25.Optical signal processing circuit in current state in the control shaven head 21, and OPC learns and resulting recording operation is performed one or many in laser spots when the outside of CD circumference moves, and arrives outermost circumferential section (S15) up to laser spots.When laser spots arrives the outermost circumferential section, carry out OPC study (S16) in the PCA zone in the outermost circumferential section (slot part 11).The mode that the OPC learning outcome that calculates in OPC learned addresses in the outermost circumferential section (position offset in the radial direction of dish) and the relevant portion corresponds to each other with them is recorded in (S14) in the storer 25.

After so having carried out aforesaid OPC learning manipulation, record data.In record data, at first calculate the optimum record energy (S17) in the current record part.When the optimum in determining the current record part writes down energy, the OPC learning outcome (optimum record energy) that from storer 25 is read step early, calculates and OPC learned addresses (position offset in the radial direction of dish) (S101), and be similar to each OPC learning outcome in the adjacent area of processing execution OPC study by 2 linearities, thereby calculate the optimum record energy (S102 and S103) in the current record part.Fig. 4 A and Fig. 4 B are the diagram that optimum record energy calculates.Fig. 4 A illustrates the position of carrying out OPC study in the CAV record.Carrying out OPC study in the inside circumference, outermost circumference and the center section, and as Fig. 4 B as shown in, by 2 in each zone optimum energy meters that write down of linear approximate treatment.

At last, shaven head 21 moves to slot part 12 (S18), and begins CAV record (S19) based on the optimum record energy in the current record part of calculating.

In this preferred embodiment, it is desirable to, the characteristic of CD is poor more, and the number of times of carrying out OPC study in the center section basically is just many more.Then, adapt to the variation of the susceptibility on surface and film thickness and can accurately obtain optimum record energy in the current record part.Simultaneously, when repetition OPC learns many times in center section (planar section 12), before start-of-record, need a lot of times.In order to address this problem, preferably, should carry out the number of times of OPC study according to the optical disk property setting.Can calculate number of times with experimental technique according to the OPC learning manipulation of optical disk property.

According to this preferred embodiment, before data recording, in center section (particularly its planar section 12), repeatedly carry out OPC study, determine final optimum record energy then, thereby can obtain the CAV record with high-quality.

Preferred embodiment 2

In the preferred embodiments of the present invention 2, proofread and correct because the difference of the optimum record energy that the difformity of planar section and slot part causes.Record data in slot part 11, and, in center section (more specifically, its planar section 12), carry out test record in order to calculate the optimum record energy of data recording in the slot part 11.If the record in record in the planar section in the center section 12 and the slot part 11 is equal to each other, proofread and correct just optional so.Yet,, proofread and correct the optimum record energy that obtains in the test record in planar section 12 because the in fact different shape of planar section 12 and slot part 11 when record data in slot part 11, it is desirable to.Preferred embodiment 2 is corresponding to this.Below explanation is according to the optical disc recording control apparatus of preferred embodiment 2.

Fig. 5 is the block diagram that illustrates according to the structure of the optical disc recording control apparatus of preferred embodiment 2.In Fig. 5, mark 32 expression groove record energy correction devices, being used for the optimum record energy correction of the planar section 12 that is calculated by optimal energy counter 24 is the optimum record energy that is suitable for slot part 11, and the energy of proofreading and correct is exported to storer 25.Other parts are with identical according to shown in Fig. 2 of preferred embodiment 1 those.Provide same parts with same tag simply and no longer describe in detail.

Planar section 12 and slot part 11 are respectively projection and recess, and the shape in the zone of their luminous point radiation is different.Therefore, the optimum record energy that is suitable for planar section 12 and slot part 11 respectively differs from one another.Therefore, illustrated in the preferred embodiment 1, by the optimum record energy that the OPC in the center section (planar section 12) study is calculated, proofread and correct and change into the optimum record energy in the slot part 11 of center section by groove record energy correction device 32.Thereby, can be with the high-quality record data.

The optimum record energy that is suitable for slot part 11 calculates by this way: shown in following expression formula, the optimum record energy in the slot part 11 is multiplied by a coefficient k.

[the optimum record energy in the slot part]=k * [the optimum record energy in the planar section]

With reference to the operation of the flowchart text shown in Fig. 6 according to the optical disc recording control apparatus of this preferred embodiment.The definite termination of operation below step S15 all with preferred embodiment 1 in illustrated identical.Step S15a closely is inserted into before the step S16.In step S15a, early the optimum record energy in the center section (planar section 12) that calculates in the step is multiplied by coefficient k, thereby proofreaies and correct optimum record energy.As a result, determined that the optimum in the center section (slot part 11) writes down energy.

Preferred embodiment 3

Fig. 7 is the block diagram that illustrates according to the structure of the optical disc recording control apparatus of the preferred embodiment of the present invention 3.In Fig. 7, mark 33 expression plane/groove correctors are used for basis because the value that optimal energy counter 24 is proofreaied and correct in the influence of the data recording of planar section.Those of explanation are identical in remaining part and the preferred embodiment 1 (Fig. 2).Provide same parts with same tag simply and no longer describe in detail.

Explain operation below with reference to the process flow diagram shown in Fig. 8 according to the optical disc recording control apparatus of this preferred embodiment.

In this CD before the record data, at first, carry out OPC study (S11) in the slot part 11 in the PCA zone in the inside circumferential section.Further, carry out OPC study (S11a and S11b) in the planar section 12 in another PCA zone in the inside circumferential section.OPC learning outcome from planar section 12 and slot part 11 is determined correction coefficient (S11c).

Next, the similar step S12 and the S13 that carry out in execution and the preferred embodiment 1, thereafter, in step S13a, the optimum record energy that calculates in the center section is used for correction.Carry out the correction calculation of optimum record energy by utilizing the correction coefficient of determining among the step S11c.Then, execution in step S14-S18, this is identical with the processing in the preferred embodiment 1.

In this preferred embodiment, it is desirable to, the characteristic of used CD is poor more, and it is just frequent more to carry out in the center section OPC study basically.Then, adapt to the variation of the susceptibility on surface and film thickness and can accurately obtain optimum record energy in the current record part.When repetition OPC learns many times in center section, before start-of-record, need a lot of times.In order to handle this problem, it is desirable to, should carry out the number of times of OPC study according to the optical disk property setting.Can calculate number of times with experimental technique according to the OPC learning manipulation of optical disk property.

According to this preferred embodiment, before record data,, proofread and correct the optimum record energy in the center section (planar section 12) based on the slot part 11 of the inside circumferential section (can be the outermost circumferential section) and the OPC learning outcome in the planar section 12.Thereby, can realize the CAV record with high-quality.

Preferred embodiment 4

In the OPC study in the planar section 12 of center section (data area), if for example any surface damage of impression of the hand or scuffing appears in the planar section 12, the level of so catoptrical RF signal will be weakened, and it can provide incorrect optimum record energy based on OPC study.The preferred embodiments of the present invention 4 head it offs.

Fig. 9 is the block diagram that illustrates according to the structure of the optical disc recording control apparatus of preferred embodiment 4.Among Fig. 9, mark 34 expression RF signal level anomaly detectors.Whether the level of the RF signal that RF signal level anomaly detector 34 detection RF signal sensors 22 detect shows any unusual.Mark 35 expression planar section learned addresses correctors.When detecting RF signal level unusual, planar section learned addresses corrector 35 is determined the address of OPC study in the planar sections, to carry out OPC study once more.Those of explanation are identical in remaining part and the preferred embodiment 1 (Fig. 2).Provide same parts with same tag simply and no longer describe in detail.

Explain operation below with reference to the process flow diagram shown in Figure 10 according to the optical disc recording control apparatus of this preferred embodiment.In the following description, the unusual method of RF signal level in the OPC study is surveyed in main explanation, and when detecting when unusual, proofread and correct the method for carrying out the address that OPC learns once more.Those of all the other operations and preferred embodiment 1 are similar.

In the subroutine S11 of OPC study, in step S52, extract the RF signal content.In following step S52a, RF signal level anomaly detector 34 judges that the level of the RF composition that extracts is whether in predetermined scope.When it judged that this level is not in predetermined scope, RF composition level was judged as and shows outlying observation (mistake), and stopped relevant OPC study.For example, occurred at the recording operation that is used for OPC study that any part of surface damage of the CD 20 of impression of the hand on the CD 20 for example or scuffing carries out, as the level of catoptrical RF signal level less than the RF signal under the normal executive logging operational circumstances.Can calculate the zone of the RF signal level be used to judge outlying observation with experimental technique.When the RF composition level that extracts is in preset range, execution in step 53 and step thereafter.

When OPC study is terminated owing to mistake, proofread and correct the disc radial position (address) of current execution OPC study, and OPC study (S13b and S13c) is carried out in the radial position after correction once more.When OPC learnt by fair termination, the state that the optimum record energy of calculating corresponds to each other with them in the position offset of the OPC study part in the radial direction of dish and the relevant OPC study part was stored in (S14) in the storer 25.In following step S15-S18 and the preferred embodiment 1 those are similar.

With respect to the circumferencial direction of CD, for example the surface damage of impression of the hand on the CD or scuffing tends to occur more along the radial direction of CD 20.Therefore, when proofreading and correct OPC study part according to this method, preferably, be the address setting of OPC study part based on because any one in the continuous address on part (address) circumferencial direction to start with that error ending OPC learns.

According to this preferred embodiment, in the OPC study in the center section of before record data, carrying out (data area), when the RF signal level was unusual owing to the surface damage of for example impression of the hand or scuffing, OPC study part was switched to another part, carries out OPC study once more at this another part.As a result, can determine optimum record energy more accurately, thereby can realize record in high quality.

Preferred embodiment 5

In OPC in the planar section 12 of the center section study, occur in the planar section 12 of CD 20 under the situation of surface damage of impression of the hand for example or scuffing, β value shows outlying observation, becomes out of true unfriendly thereby write down the energy setting based on the optimum of OPC study.The preferred embodiments of the present invention 5 head it offs.

Figure 11 is the block diagram that illustrates according to the structure of the optical disc recording control apparatus of preferred embodiment 5.In Figure 11, mark 36 expression β value anomaly detectors, be used to survey by the β value of β value counter 23 calculating unusually.Mark 35a represents planar section learned addresses corrector.When detecting β value unusual, planar section learned addresses corrector 35a determines to carry out once more the address in the center section (radial position) of OPC study.The similar of the preferred embodiment 1 shown in all the other structures and Fig. 2.

Below with reference to the operation of the detailed description of the process flow diagram shown in Figure 12 according to the optical disc recording control apparatus of this preferred embodiment.In the following description, main explanation is surveyed β value is unusual in the OPC study method and is being detected when unusual, proofreaies and correct the method for carrying out the address that OPC learns once more.Those that illustrate in remaining part and the preferred embodiment 1 (Fig. 2) are similar.Provide like with same tag simply and no longer describe in detail.

In the subroutine S11 of OPC study, in step S53, calculate β value, and in following step S53a, whether the β value of β value anomaly detector 36 judgement calculating is in preset range.When judging the β value not in predetermined scope the time, judge that β value shows outlying observation (mistake), and stop OPC and learn.Have on the CD thereon for example impression of the hand or the part of the surface damage of scuffing be set under the situation of OPC study part, as the level of catoptrical RF signal less than the RF signal level in the normal recordings operation.Therefore, the β value from the RF calculated signals illustrates and the different value of normal recordings operation.Can calculate the β value scope that is used to judge outlying observation with experimental technique.When the β value of calculating is in preset range, execution in step S54 next.

When OPC learnt quilt owing to error ending, the radial position (address) of the dish of current execution OPC study was changed, and carried out OPC study (S13c) in reformed part once more.When OPC study during by fair termination, the state that OPC study part and the optimum record energy that calculates correspond to each other with them is stored in (S14) in the storer 25.In following step S15-S18 and the preferred embodiment 1 those are similar.

In the method for a part that changes OPC study part, preferably, with with the similar mode of preferred embodiment of explanation early, be the address setting of OPC study part based on because any one in the continuous address on part (address) circumferencial direction to start with that error ending OPC learns.

According to this preferred embodiment, owing to when for example the β value of the surface damage of impression of the hand or scuffing is unusual, carried out before record data in the part of OPC study, OPC study part is changed, thereby carries out OPC study there once more when detecting.As a result, can determine optimum record energy more accurately, thereby finish recording operation in high quality.

Preferred embodiment 6

In the preferred embodiments of the present invention 6, the record energy controller comprises the structure that replaces linear multi interpolation execution linear interpolation via least square method.In preferred embodiment 1-5, optimum record energy is prepared in the form and is deposited with in the storer.Under the situation of using optimum record energy meter, the processing burden that produces form in the firmware is big.This preferred embodiment is handled this inconvenience.

Figure 13 is the block diagram that illustrates according to the structure of the optical disc recording control apparatus of preferred embodiment 6.In this preferred embodiment, the least square method linear interpolation is provided at according to conduct record energy controller in the structure of preferred embodiment 1 (Fig. 2), replaces the linear multi interpolater among the preferred embodiment 1-5.Those of explanation are identical in remaining part and the preferred embodiment 1 (Fig. 2).Provide same parts with same tag simply and no longer describe in detail.

Below with reference to the operation of the flowchart text shown in Figure 14 according to the optical disc recording control apparatus of this preferred embodiment.In this preferred embodiment based on preferred embodiment 1, the approximate method of determining the optimum record energy of current record part via least square method is adopted in main explanation.Other operation, i.e. OPC operation and determine operation after the optimum record energy, similar with in the preferred embodiment 1 those.

With with preferred embodiment 1 similar mode, carrying out OPC study in the inside circumference, outermost circumference and the center section, and the OPC learning outcome that obtains is stored in the storer 25 with their states corresponding to the position offset of the various piece in the radial direction of dish.Next, when record data, determine the optimum record energy (S17) in the current record part.When the optimum in determining the current record part writes down energy, the position offset (S101) of OPC learning outcome that calculates in the step before from storer 25, reading in and the study of OPC in the radial direction part.Then, as shown in Figure 15 B, produce the linear-apporximation expression formula via least square method from all OPC learning outcomes: [P (x)=Ax+B] (S104).The optimum that calculates in the current record part via approximate expression writes down energy (S105).Then, shaven head 21 is moved to slot part 11 (S18), and begins CAV record (S19) based on the optimum record energy in the current record part of calculating.

According to this preferred embodiment, under the situation of not utilizing optimum record energy meter, according to via this simple linear-apporximation expression formula of least square method: [P (x)=Ax+B], data recording operation fall into a trap calculate optimum record energy corresponding to the current address after, record data.Thereby in reducing firmware, handle under the situation of burden, can finish recording operation with more speed.Further, determine final optimal record energy in the mode of the influence of having eliminated the surface damage (scratching or stain) that produces from the part.As a result, can finish the CAV record with high-quality more.

The technology that illustrates in this preferred embodiment can be applied among the preferred embodiment 2-5.

Preferred embodiment 7

Figure 16 is the block diagram that illustrates according to the structure of the optical disc recording control apparatus of the preferred embodiment of the present invention 7.Among Figure 16, those identical parts of any and preferred embodiment 1 (Fig. 2) provide same parts with same tag simply and no longer describe in detail.Error monitor 37 is provided in this preferred embodiment.Error monitor 37 monitors for example mistake of buffer underrun, the temporary transient data recording operation that stops when producing mistake, and then carry out OPC study.Those of all the other structures and preferred embodiment 1 are similar.

Specifically describe operation below with reference to the process flow diagram shown in Figure 17 according to the optical disc recording control apparatus of this preferred embodiment.Recording method according to the recording method of this preferred embodiment and preferred embodiment 1 is similar.In preferred embodiment 7, when temporary transient interruption logging is operated, the recording method that repeats the following describes.

When with the operation similar operation of preferred embodiment 1 in owing to produce wrong during temporary transient interruption logging operation, error monitor 37 recomputates and produces the optimum record energy of locating wrong position (recording section) (S20).More specifically, error monitor 37 monitors wrong (S21) continuously, and is producing under the wrong situation, carries out OPC study (S22) on the position when producing mistake.The locational OPC study follow procedures S31-S35 that mistake produces.More specifically, move shaven head 21 so that laser spots and arrive the most approaching wrong planar section 12 (S31) that produces the position, and carry out OPC study (S32) there.The disc radial position (address) of the OPC study part of calculating like this and optimum write down energy as mutual relationship by extra storage (S33) in storer 25.When record data, based on addition record wherein the mutual relationship of the locational optimum record energy of wrong generation determine that the optimum in the current record part writes down energy (S34).In the optimum record energy of current record part, the OPC learning outcome that before storer 25 reads in, calculates the step and each position (address) on the disc radial direction, then, produce the OPC learning outcome in the OPC study part adjacent one another are of front side of OPC learning outcome on the position (next-door neighbour's recording section before the current record part) and current record part based on mistake, by the processing of 2 linearities approximate (referring to Fig. 4), calculate the optimum record energy in the current record part.After aforementioned processing, shaven head 21 is moved to the radial position (mistake generation point) last (S35) that data recording is temporarily interrupted, to restart data recording.

In this preferred embodiment, it is desirable to, the characteristic of used CD is poor more, and it is just frequent more to carry out in the center section OPC study basically.Then, adapt to the variation of the susceptibility on surface and film thickness and can accurately obtain optimum record energy in the current record part.When repetition OPC learns many times in planar section, before start-of-record, need a lot of times.It is desirable to, the number of times of OPC learning manipulation is set according to optical disk property.Can calculate number of times with experimental technique according to the OPC learning manipulation of optical disk property.

According to this preferred embodiment, before data recording, repeat in the center section after the OPC study, in data recording, still produce under the wrong situation, can produce part to mistake as OPC study part, so that can determine optimum record energy more accurately.Thereby can realize the CAV record with high-quality, and the data of record can be reproduced in the optical disc reproducing apparatus that is provided by other company.

Preferred embodiment 8

Figure 18 is the block diagram that illustrates according to the structure of the optical disc recording control apparatus of the preferred embodiment of the present invention 8.Among Figure 18, those identical parts of any and preferred embodiment 1 (Fig. 2) provide same parts with same tag simply and no longer describe in detail.In this preferred embodiment, addition record position sensor 38 further is provided, be used for when additionally during record data, surveying the addition record position at CD.

Specify operation below with reference to the process flow diagram shown in Figure 19 according to the optical disc recording control apparatus of this preferred embodiment.

When addition record data in CD, before record data, carry out test record is used for data recording with calculating optimum record energy (S10).In test record, at first, addition record position sensor 38 obtain on the disc radial direction of addition record position of beginning addition record operation position (address) (S11a).Next, the optical signal processing circuit in the control shaven head 21, so that laser spots is moved to the planar section (S12a) of addition record part, and in relevant portion, carry out OPC study (S13).Those that carry out in OPC study (S13) and processing afterwards and the preferred embodiment 1 are similar.

In this preferred embodiment, optimum in the middle body that obtains record energy and the optimum of preferred embodiment 1 write down under the situation that energy equates, have reduced the addition record part.Therefore, can reduce the number of times of OPC learning manipulation, that is to say, can cut down the time span of carrying out OPC study.With preferred embodiment 1 under the illustrated the same situation of carrying out OPC study continually, the identical time quantum that is used for OPC study can obtain more accurate optimum record energy.Can calculate number of times with experimental technique according to the OPC learning manipulation of optical disk property.

According to this preferred embodiment, before the addition record of CD, in the addition record part, carry out OPC study.As a result, can reduce OPC learning time, can determine optimum record energy more accurately, and can finish the addition record operation with high-quality.

Preferred embodiment 9

Figure 20 is the block diagram that illustrates according to the structure of the optical disc recording control apparatus of the preferred embodiment of the present invention 9.Among Figure 20, those identical parts of any and preferred embodiment 1 (Fig. 2) provide same parts with same tag simply and no longer describe in detail.In this preferred embodiment, represent to be used for structure according to the signal circuit of this preferred embodiment executive logging control by the projected square part of dotted line.

Structure according to this preferred embodiment comprises record energy controller 26.Record energy controller 26 produces the drive current control signal approximate with a plurality of OPC learning outcomes based on the result of calculation of optimal energy counter 24, and the drive current control signal that produces is exported to laser driving apparatus 27.

According to the class of operation of the operation of the optical disc apparatus of this preferred embodiment and preferred embodiment 1 seemingly.

Embodiment 10

Figure 21 is the block diagram that illustrates according to the structure of the optical disc recording control apparatus of the preferred embodiment of the present invention 10.Among Figure 21, those identical parts of any and preferred embodiment 1 (Fig. 2) provide same parts with same tag simply and no longer describe in detail.In this preferred embodiment, fault localization device 39 further is provided, be used for the detection dish and in the OPC of CD study, carry out the surface damage that whether occurs impression of the hand for example or scuffing in the part of OPC study.

The input of fault localization device 39 be shaven head comprise in 21 be used to survey output from the photodetector (not shown) of CD 20 laser light reflected.When the output level that detects photodetector is compared with predetermined value when weakening, photodetector 39 judges whether to occur the surface damage of impression of the hand for example or scuffing in the part of the laser emission of CD 20.Fault localization device 39 offers OPC learned addresses determining unit 29 to judged result.OPC learned addresses determining unit 29 is received from the notice that occurs surface damage on the part of the laser emission in the CD 20 of fault localization device 39, the OPC learn position is changed instruction export to bare headed mobile unit 28.The OPC learn position changes surface damage does not appear in instruction indication shaven head 21 in CD the moving of any part.

Specify operation below with reference to the process flow diagram shown in Figure 22 and Figure 23 according to the optical disc recording control apparatus of this preferred embodiment.In CD, before the record data, move the record position of shaven head 21, with the optimum record energy (S10a) that uses in the computational data record.In the track (being preferably slot part 11) in the PCA zone of the Target Setting that moves in carrying out the inside circumference of OPC study.Next, be set under the state of constant level being transmitted into the laser energy that CD 20 gets on, confirm to carry out in the zone of test record surface damage (S10b) whether occurs.When detecting surface damage in the zone in test record in step S10b, fault localization device 39 sends the instruction that is used for the record position of shaven head 21 is moved to the diverse location in relevant PCA zone to learned addresses determining unit 29 and bare headed mobile unit 28.The bare headed mobile unit 28 that receives instruction moves to the record position of shaven head 21 by the diverse location in the PCA zone of OPC learned addresses determining unit 29 appointments (supposition does not comprise the part of any surface damage) (S10c).Then, execution in step S10b once more.When not detecting surface damage in the zone of in step S10, carrying out test record, omit step S10c and carry out OPC study (S11).Those processing of execution are similar in OPC study (S13) and later processing and the preferred embodiment 1.

The step (S13 and S16) that can in center section (data recording area) and outermost circumferential section, carry out OPC study before execution in step S10a to step S10c.In this case, shaven head 21 is set to not be in the PCA zone, but in step S10c (S10d among Figure 22), carry out OPC study track near move.

According to this preferred embodiment, in the OPC study of before data recording, carrying out, can be before realizing OPC study, prevent because for example remarkable deterioration of the OPC learning accuracy that causes unusually of the RF signal level that causes of the surface damage of impression of the hand or scuffing, or prevent to produce for example mistake of OPC study failure.As a result, can realize wherein having determined more accurately the high quality record operation of optimum record energy.

Although present the preferred embodiments of the present invention of thinking have been described, but be appreciated that, can carry out various modifications to them,, can think that these modifications are covered by accessory claim as long as these modifications fall in true spirit of the present invention and the scope.

Claims (20)

1, a kind of optical disc recording control method comprises:

In CD, before the record data, learn, calculate optimum record energy based on the inside circumferential section of this CD and the optimal energy control OPC of outer peripheral part and at least one center section between this inside circumferential section and outer peripheral part; With

Based on this inside circumferential section, outer peripheral part and the center section mutual relationship between the position offset in the radial direction of this CD and the optimum record energy that in this various piece, calculates optimum record energy in the current record part is set, comes to these data of this video disc recording to carry out Laser Driven control by the optimum record energy that adopts this setting.

2, optical disc recording control method as claimed in claim 1, wherein

This CD has track, and this track comprises the slot part of record data wherein and the planar section of recording secondary information wherein, wherein

The optimum record energy in this planar section is calculated in study based on the OPC in this center section.

3, optical disc recording control method as claimed in claim 2, wherein

In this inside circumferential section and outer peripheral part, calculate the optimum record energy in this slot part.

4, optical disc recording control method as claimed in claim 1, wherein

In this inside circumferential section and outer peripheral part, calculate the optimum record energy among the PCA of energy calibration zone.

5, optical disc recording control method as claimed in claim 1 further comprises:

Before the step of this optimum record energy is calculated in study based on the OPC in this inside circumferential section, outer peripheral part or the center section, survey in this inside circumferential section, outer peripheral part or center section, any surface damage whether to occur, wherein

The position in the radial direction of the dish in detecting the inside circumferential section, outer peripheral part or the center section of this surface damage is changed to the position of surface damage not occurring, learns to calculate this optimum record energy based on being used for based on the OPC that the step of optimum record energy is calculated in this OPC study then.

6, a kind of optical disc recording control apparatus comprises:

Shaven head is used for data recording to CD;

OPC learned addresses determining unit, be used for before these CD record data, determine to become the position in the radial direction of outer peripheral part mid-game of position in the radial direction, this CD of the inside circumferential section mid-game of this CD of OPC learning objective and the position in the radial direction of the center section mid-game between at least one this inside circumferential section and the outer peripheral part;

The shaven head mobile unit is used for this shaven head is moved to this inside circumferential section, outer peripheral part and center section respectively, and shaven head is determined by this OPC learned addresses determining unit in the position in the radial direction of dish;

The optimal energy counter, be used for from the shaven head emission that moved to this inside circumferential section, outer peripheral part and center section respectively and in the information of the scrambling of this optical disk property of expression that comprises from the laser of this CD reflection thereafter, the optimum that calculates in this inside circumferential section, outer peripheral part and the center section writes down energy;

Storer is used for storing this inside circumferential section, outer peripheral part and the center section determined by this OPC learned addresses determining unit along the position offset of the radial direction of this CD and the mutual relationship that is write down by the optimum in this various piece of this optimal energy counter calculating between the energy;

The record energy controller is used at record during these data, and the optimum record energy the current record part of this CD is set based on the mutual relationship that reads from this storer; With

Laser driving apparatus is used at record during these data, when the optimum in the current record partly of this CD of the value of setting control by this record energy controller writes down energy, via this shaven head this data recording to this CD.

7, optical disc recording control apparatus as claimed in claim 6, wherein

This CD has track, and this track comprises the slot part that wherein writes down these data and the planar section of recording secondary information wherein, and

This OPC learned addresses determining unit is defined as the position in the radial direction of this dish in the part of the arbitrary plane in this center section the position in the radial direction of this dish in this center section.

8, optical disc recording control apparatus as claimed in claim 7, wherein

This OPC learned addresses determining unit is defined as the position in the radial direction of this dish in this inside circumferential section to the position in the radial direction of this dish in any slot part in this inside circumferential section, and the position in the radial direction of this dish in any slot part in this outer peripheral part is defined as the position in the radial direction of this dish in this outer peripheral part.

9, optical disc recording control apparatus as claimed in claim 6, wherein

This OPC learned addresses determining unit is defined as the position in the radial direction of this dish in this inside circumferential section to the position in the radial direction of this dish among the PCA in this inside circumferential section, and the position in the radial direction of this dish among the PCA in this outer peripheral part is defined as the position in the radial direction of this dish in this outer peripheral part.

10, optical disc recording control apparatus as claimed in claim 6 further comprises:

The RF signal sensor is used for surveying the RF signal that the signal that detects of this laser comprises; With

β value counter is used for representing from the RF signal measurement that is detected by this RF signal sensor the β value of the scrambling of this optical disk property, wherein

This optimal energy counter is treated to the β value of being measured by this β value counter the information of the scrambling of this optical disk property of expression.

11, optical disc recording control apparatus as claimed in claim 7 further comprises groove record energy correction device, wherein

Optimum record energy in the slot part that this groove record energy correction device is the record of the optimum in the planar section of this center section that is calculated by this optimal energy counter energy correction this center section.

12, optical disc recording control apparatus as claimed in claim 7 further comprises plane/groove corrector, wherein

This plane/groove corrector is proofreaied and correct by the optimum record energy in the planar section of this center section of this optimal energy counter calculating, to eliminate by the laser of radiation imposes on any influence of the slot part adjacent with this planar section in order to obtain the optimum record energy in this planar section.

13, optical disc recording control apparatus as claimed in claim 12, wherein

This plane/groove corrector is based on the slot part from this inside circumferential section or outer peripheral part and the result of planar section laser light reflected of being compared to each other, proofread and correct the optimum record energy in the planar section of this center section, to eliminate by the laser of radiation imposes on any influence of the slot part adjacent with this planar section in order to obtain the optimum record energy in this planar section.

14, optical disc recording control apparatus as claimed in claim 10 further comprises:

RF signal level anomaly detector is used for when this optimal energy counter calculates this optimum record energy, survey whether produce in the level of the RF signal that detects by this RF signal sensor unusual; With

Planar section learned addresses corrector is used for detecting when unusual when this RF signal level anomaly detector, and correcting detection is to the position in the radial direction of this unusual dish, wherein

This shaven head mobile unit moves to the position in the radial direction of the dish of being proofreaied and correct by this planar section learned addresses corrector to this shaven head, and

This optimal energy counter from expression be moved on the correction position in the radial direction of this dish the shaven head emission and in the information of the scrambling of this optical disk property that from the laser of this CD reflection, comprises thereafter, recomputate each this locational optimum energy that writes down in the radial direction of dish.

15, optical disc recording control apparatus as claimed in claim 10 further comprises:

Whether β value anomaly detector is used for surveying the β value of being calculated by this β value counter and producing any unusual when this optimal energy counter calculates this optimum record energy; With

Planar section learned addresses corrector is used for detecting this when unusual when this β value anomaly detector, and correcting detection is to the position in the radial direction of this unusual dish, wherein

This shaven head mobile unit moves to this shaven head the position in the radial direction of the dish of being proofreaied and correct by this planar section learned addresses corrector; And

This optimal energy counter by the locational shaven head emission in the radial direction of the dish that is moved to this correction and in the information of the scrambling of the optical disk property that comprises thereafter, recomputates each this locational optimum energy that writes down in the radial direction of dish from expression from this laser of this CD reflection.

16, optical disc recording control apparatus as claimed in claim 6, wherein

This record energy controller is carried out the linear interpolation of this mutual relationship and is handled, thereby the optimum record energy in this current recording section is set.

17, optical disc recording control apparatus as claimed in claim 6, wherein

This record energy controller is handled this mutual relationship via least square method, thereby the optimum record energy in this current recording section is set.

18, optical disc recording control apparatus as claimed in claim 6 further comprises error monitor, is used in the process of these data of record anyly when causing this record interruption wrong when producing, and interrupts this record, wherein

This shaven head mobile unit moves to this shaven head the position in the radial direction of the dish that produces this mistake;

This optimal energy counter from expression by the locational shaven head emission in the radial direction that is moved to the dish that produces this mistake and in the information of the scrambling of the optical disk property that from the laser of this CD reflection, comprises thereafter, calculate the locational optimum record energy in the radial direction of the dish that produces this mistake, and

This memory stores has added the locational optimum mutual relationship that writes down energy in the radial direction of the dish of this mistake of generation of being calculated by this optimal energy counter.

19, optical disc recording control apparatus as claimed in claim 6 further comprises the addition record position sensor, is used for when in these these data of CD addition record, surveys in the radial direction the position of addition record position at dish, wherein

This shaven head mobile unit moves to this shaven head on this addition record position, and this addition record position is detected by this addition record position sensor in the position in the radial direction of dish;

This optimal energy counter from expression by being moved to the locational shaven head emission of this addition record and, calculating the locational optimum record energy of this addition record in the information of the scrambling of the optical disk property that from the laser of this CD reflection, comprises thereafter; And

This memory stores has added the mutual relationship of the locational optimum record energy of this addition record that is calculated by this optimal energy counter.

20, optical disc recording control apparatus as claimed in claim 6, further comprise the fault localization device, be used for before calculating this optimum record energy based on the OPC study of this inside circumferential section, outer peripheral part and center section, survey in this inside circumferential section, outer peripheral part or the center section any surface damage whether occurs, wherein

This OPC learned addresses determining unit is when this fault localization device detects surface damage, the position in the radial direction of the dish of the position in the radial direction of the dish of the position in the radial direction of the dish of the inside circumferential section that detects this surface damage, outer peripheral part or center section, change into the position that surface damage do not occur.

Images