CN100359572C - Intelligent skipping method - Google Patents
Intelligent skipping method Download PDFInfo
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- CN100359572C CN100359572C CNB2004100485564A CN200410048556A CN100359572C CN 100359572 C CN100359572 C CN 100359572C CN B2004100485564 A CNB2004100485564 A CN B2004100485564A CN 200410048556 A CN200410048556 A CN 200410048556A CN 100359572 C CN100359572 C CN 100359572C
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- reflection horizon
- skip floor
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Abstract
The present invention relates to an intelligent skipping method which is applied to an optical disc drive for reading a disc. The disc is provided with a central reference point, at least a first reflecting layer and at least a second reflecting layer, wherein the first reflecting layer is provided with a plurality of first tracks, and the second reflecting layer is provided with a plurality of second tracks. The method comprises the following steps: the laser light beam of the optical disc drive is focused on the first reflecting layer to form a focal point and obtain an original position; the original position is compared with the relative position of a target position positioned on the second reflecting layer to determine the skipping and track seeking path of the focal point; the focal point is moved from the original position to the target position according to the set skipping and track seeking path.
Description
Technical field
The invention relates to a kind of intelligent layer jump method, and particularly relevant for a kind of intelligent layer jump method that is applied to CD player.
Background technology
With the increase of work high power capacity optical storage media demand, the above multifunctional optical disk (Digital Versatile Disc is hereinafter to be referred as the DVD disc) in the double-deck reflection horizon of tool is day by day played an important role.Therefore, when reading the DVD disc, the data on the disc of how reading fast and stably is the problem that each tame manufacturer endeavours to study to reduce the data search time (data access time).
CD player is by the rotation disc and at radially (the radial direction) of disc mobile optical read head (pick up head), utilizes the reflection horizon of laser beam scan light disc to come the access data again.Please refer to Fig. 1, it shows the diagrammatic cross-section of the disc in the double-deck reflection horizon of traditional tool.Disc 10 has first reflection horizon 102 and second reflection horizon 104, and data promptly is stored in this two-layer reflection horizon. Filled arrows 106 and 108 is the direction of sensing away from the disc center among the figure, and filled arrows 110 and 112 is for pointing to the directions at disc center.Laser beam sees through object lens 114 and focuses on the predetermined reflection horizon, and the photosensitive device on the reflected back optics read head (optical detector) is gone up (not being shown among the figure) then.
Please refer to Fig. 2, the configuration schematic diagram of the photosensitive device on its display optical read head.Include six optical diodes in the photosensitive device, can be used to produce focusing error (Focus Error, FE) signal by optical diode 202,204,206,208 parts of being formed.The size of focus error signal can FE=(A+C)-(B+D) expression.Two 210,212 of optical diodes are that (its big I is designated as TE=(F-E) to the generation tracking error for Tracking Error, the TE) source of signal in addition.
Please refer to Fig. 3 A and Fig. 3 B, Fig. 3 A explicit declaration laser beam is striden the situation of rail; Fig. 3 B shows corresponding tracking error signal.When laser beam 304 was up mobile, optical diode 210 received the reflected light on the track 302 (track), and optical diode 212 receives the reflected light on the non-track.Therefore, the signal received when optical diode 212 is stronger, and tracking error signal is on the occasion of (TE=F-E＞0); Otherwise then produce the tracking error signal of negative value.If laser beam is radiated on the track (or track) simultaneously, then optical diode 210 equates with the intensity of reflected light that optical diode 212 receives, and this moment, tracking error signal was 0.Each T represents the cycle of a seeking signal (tracking cross signal), as shown in Fig. 3 B.
For now, the data storage mode of DVD disc has multiple, and wherein for example the dual layer disc mechanism that just must have skip floor to read is cooperated.Please be back to Fig. 1, object lens 114 are just focusing on the reflection horizon 102 in this figure, and when optical read head will read data on the reflection horizon 104, object lens 114 can be moved up dropped on the reflection horizon 104 focus point 116, to read the data in reflection horizon 104.Otherwise, if CD player need later read the data on the reflection horizon 102, then can carry out one time skip floor again, focus point 116 can oppositely be moved on the reflection horizon 102 by reflection horizon 104.
Yet, the offset that the different size disc and the Spindle Motor of different disc manufacturer manufacturings caused, can make disc shake up and down in rotary course and rock, the rotating speed of CD player is more and more fast especially now, and therefore the degree of rocking only can become greatly and not and can diminish.And, more be the disc outer ring, the degree of rocking more is obvious.Known skip floor mode is directly by the target location of the original position skip floor on the reflection horizon to another reflection horizon, even the target location is in the disc outer ring and is in the state that acutely rocks.Therefore very possible when causing skip floor because be difficult for focusing on focus point 116 drop between reflection horizon 102 and the reflection horizon 104, or surpass 104 tops, reflection horizon and cause the failure of focusing, the focus error signal that optical read head detected at this moment is all 0.Under this situation, may the focus-compensating technology all It dones't help the situation, and because after the skip floor failure, often can't learn the position of object lens 114, came and make focalizer get accent, thereby cause focusing on once more and need take a long time, reduced the efficient of data access.
Summary of the invention
The object of the present invention is to provide a kind of intelligent layer jump method, utilize the relative position of in advance judging original orbit position (original position) and target track position (target position), to determine follow-up skip floor path and step.More clearly, the time point that skip floor takes place all is the position of inner ring comparatively on the genus disc in original orbit position and target track position, promotes the probalility of success that focuses on behind the skip floor with this, belongs to a kind of intelligent intelligent layer jump method.
According to above-mentioned purpose, the present invention proposes a kind of intelligent layer jump method, when being used for a CD player access one disc, this disc has a center reference point, at least one first reflection horizon and one second reflection horizon, this first reflection horizon has a plurality of first tracks, this second reflection horizon has a plurality of second tracks, and this method comprises:
One laser beam of this CD player is focused on this first reflection horizon forming a focus point, and obtain an initial position;
Relatively this reference position be positioned at the relative position of the target location on this second reflection horizon, when this target location than this reference position more near this center reference point, prior to moving this focus point to one preparation skip floor position in the mode of crossing over those first tracks of part on this first reflection horizon, this preparation skip floor position is than more close this center reference point in this target location;
In the skip floor mode focus point is moved to a corresponding skip floor position on this second reflection horizon by this preparation skip floor position, this correspondence skip floor position is than more close this center reference point in this target location; And
On this second reflection horizon, this focus point is moved to this target location by this correspondence skip floor position in the mode of crossing over those second tracks of part.
Wherein this disc is a digital multi disc in the double-deck reflection horizon of tool.
Wherein the relative position of this reference position and this target location is to judge according to the mode of sector number.
A kind of intelligent layer jump method of the present invention, when being used for a CD player access one disc, this disc has a center reference point, at least one first reflection horizon and one second reflection horizon, and this first reflection horizon has a plurality of first tracks, this second reflection horizon has a plurality of second tracks, and this method comprises:
One laser beam of this CD player is focused on this first reflection horizon forming a focus point, and obtain an initial position;
Relatively this reference position be positioned at the relative position of the target location on this second reflection horizon, when this target location than this reference position more near this center reference point, prior to moving this focus point to one preparation skip floor position toward the direction of this center reference point on this first reflection horizon, this preparation skip floor position than this target location further from this center reference point;
In the skip floor mode focus point is moved to a corresponding skip floor position on this second reflection horizon by this preparation skip floor position, this correspondence skip floor position than this target location further from this center reference point; And
On this second reflection horizon, this focus point is moved to this target location by this correspondence skip floor position.
Description of drawings
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Fig. 1 shows the diagrammatic cross-section of the disc in the double-deck reflection horizon of traditional tool.
The configuration schematic diagram of the photosensitive device on Fig. 2 display optical read head.
Fig. 3 A explicit declaration laser beam is striden the situation of rail.
Fig. 3 B shows corresponding tracking error signal.
Fig. 4 explicit declaration is according to the flow process of the intelligent layer jump method of a preferred embodiment of the present invention.
Fig. 5 explicit declaration is according to the synoptic diagram of the first kind skip floor flow process of intelligent layer jump method on disc of a preferred embodiment of the present invention.
Fig. 6 explicit declaration is according to the synoptic diagram of the second kind skip floor flow process of intelligent layer jump method on disc of a preferred embodiment of the present invention.
Fig. 7 explicit declaration is according to the synoptic diagram of the third the skip floor flow process of intelligent layer jump method on disc of a preferred embodiment of the present invention.
Fig. 8 explicit declaration is according to the synoptic diagram of the four kind skip floor flow process of intelligent layer jump method on disc of a preferred embodiment of the present invention.
Fig. 9 explicit declaration is according to the synoptic diagram of the five kind skip floor flow process of intelligent layer jump method on disc of a preferred embodiment of the present invention.
Figure 10 explicit declaration is according to the synoptic diagram of the six kind skip floor flow process of intelligent layer jump method on disc of a preferred embodiment of the present invention.
Figure 11 explicit declaration is according to the synoptic diagram of the seven kind skip floor flow process of intelligent layer jump method on disc of a preferred embodiment of the present invention.
Figure 12 explicit declaration is according to the synoptic diagram of the eight kind skip floor flow process of intelligent layer jump method on disc of a preferred embodiment of the present invention.
Embodiment
Because the skip floor mode of known technology focuses on failure easily behind skip floor when the outer race track of disc is in high rotating speed, therefore purpose of the present invention is promptly solving above-mentioned puzzlement.Now lifting a preferred embodiment is described as follows.
Please be simultaneously with reference to Fig. 4 to Fig. 6, Fig. 4 explicit declaration is according to the flow process of the intelligent layer jump method of a preferred embodiment of the present invention; Fig. 5 explicit declaration is according to the synoptic diagram of the first kind skip floor flow process of intelligent layer jump method on disc of a preferred embodiment of the present invention; Fig. 6 explicit declaration is according to the synoptic diagram of the second kind skip floor flow process of intelligent layer jump method on disc of a preferred embodiment of the present invention.
The intelligent layer jump method of preferred embodiment of the present invention is to be applied to a CD player with access one optical storage media (optical recoding medium), for example is disc 10.Disc 10 has first reflection horizon 102 and second reflection horizon 104.First reflection horizon 102 has quite most first track, 1022, the second reflection horizon 104 and has the corresponding second most track 1042.Disc 10 be preferably the double-deck reflection horizon of a tool the digital multi disc (Digital Versatile Disk, DVD).
In step 402, at first focus on first reflection horizon 102 forming a focus point (focal point) 116, and obtain an initial position 502, as shown in Figure 5 by optical read head 118 emitted laser beams.
Now, in step 404, optical read head 11 8 receives the instruction (instruction) that layer (layer change) is changed in indication, at this moment, focus point 116 can't directly carry out skip floor, but the first relatively relative position of target location on the reference position on first reflection horizon 102 and second reflection horizon 104, with the skip floor that determines focus point 116 and why seek rail (seek) path.Wherein, the relative position of reference position and target location is to judge according to the mode of sector number (Sector number).
In step 406, optical read head 118 is according to the skip floor of decision and seek the rail path, and focus point 116 is moved to the target location by reference position.In Fig. 5, when comparative result be target location 504 with respect to reference position 502 be positioned at disc 10 than inner circle area, that is near center reference point 101, this moment, CD player switched to out loop (open loop) system.The direction 110 that rail searching servo system (seekingservo) drives optical read head 118 past disc centers moves, make focus point 116 move to a preparation skip floor position (before layerchange position) 506, and this preparation skip floor position 506 is with respect to target location 504 in the mode of crossing over part first track 1022.In seeking the rail process, rail searching servo system (seeking servo) can by seeking signal (tracking cross signal) calculate across track number.
Now is in step 410, and focus servosystem (focusing servo) is controlled actuator 120 and driven object lens 114 and moves toward vertical disc directions 122, and focus point 116 is up moved to carry out skip floor with work.At last, focus point 116 lock in second reflection horizon 104 rail (hold) and follow work (follow) second track 1042 one move to target location 504, and finish the program of whole skip floor and focusing.This moment, CD player was in closed loop (close loop) system state, and optical read head 118 is controlled by cyclic track servo system (tracking servo).
On the contrary, in Fig. 6, when relatively result is that target location 604 is the outer collar regions that are positioned at disc 10 with respect to reference position 602, that is away from center reference point 101, CD player switches to out loop (open loop) system at this moment.Now carries out the step of focusing and skip, focus servosystem is controlled actuator 120 and is driven object lens 114 and moves toward vertical disc directions 122, make focus point 116 with an outstanding corresponding skip floor position (corresponding layerchange position) 606 that up moves on second reflection horizon 104, as the step 412 among Fig. 4.
In step 414, rail searching servo system control optical read head 118 moves toward the directions 106 away from the disc center, makes focus point 116 move near the target location 604 in the mode of crossing over part second track 1042 on second reflection horizon 104 and locks the rail program.Then, when focus servosystem was received focus error signal, lock rail program had been finished in representative, and this moment, CD player switched to the closed loop system state.At last, focus point 116 follows one of work second track 1042 and moves to target location 604 on second reflection horizon 104.
According to the spirit of the intelligent layer jump method of preferred embodiment of the present invention, except above-mentioned two kinds of skip floor flow processs, division is as follows in regular turn for other skip floor flow process:
Please refer to Fig. 7, its explicit declaration is according to the synoptic diagram of intelligent layer jump method the third skip floor flow process on disc of a preferred embodiment of the present invention.When target location 704 during compared with the more close center reference point 101 in beginning position 702, the skip floor path setting is one to follow rail, skip floor in regular turn and follow the path of rail again.Step is in regular turn: in the mode of following rail focus point 116 is moved to preparation skip floor position, one on second reflection horizon 104 706 by reference position 702 toward the direction of center reference point 101, wherein prepare the address (address) of skip floor position 706 or time point than target location 704 more close center reference points 101.Now moves to a corresponding skip floor position 708 first reflection horizon 102 on focus point 116 by preparation skip floor position in the mode of skip floor, and the address of this corresponding skip floor position 708 or time point are identical with the address or the time point of preparation skip floor position 706.At last, in the mode of following rail focus point 116 is moved to target location 704 by corresponding skip floor position 708.
Please refer to Fig. 8, its explicit declaration is according to the synoptic diagram of intelligent layer jump method the 4th kind of skip floor flow process on disc of a preferred embodiment of the present invention.When target location 804 during compared with the more close center reference point 101 in beginning position 802, the skip floor path setting is one to follow rail, skip floor in regular turn and follow the path of rail again.Step is in regular turn: second track 1042 of focus point 116 being crossed over part by reference position 802 toward the direction of center reference point 101 in the mode of following rail, and moving to preparation skip floor position 806 on second reflection horizon 104, this preparation skip floor position 806 is than target location 804 more close center reference points 101.The corresponding skip floor position 808 that now moves to focus point 116 on first track 1022 by preparation skip floor position 806 in the mode of skip floor, the address of this corresponding skip floor position 808 or time point are identical with the address or the time point of preparation skip floor position 806.At last, execution is locked rail and in the mode of following rail focus point 116 is moved to target location 804 by corresponding skip floor position 808.
Please refer to Fig. 9, its explicit declaration is according to the synoptic diagram of the five kind skip floor flow process of intelligent layer jump method on disc of a preferred embodiment of the present invention.When target location 904 and reference position 902 distance centers are all identical with reference to 101, and be positioned at disc 10 than inner ring the time, directly focus point 116 is moved to target location 904 by reference position 902 in the mode of skip floor.
Relatively, please refer to Figure 10, its explicit declaration is according to the synoptic diagram of the six kind skip floor flow process of intelligent layer jump method on disc of a preferred embodiment of the present invention.When the address of target location 908 and reference position 906 or time point are identical, but when belonging to the outer race track of disc 10, determine the skip floor path for following rail, skip floor in regular turn and following the path of rail again.For example second track at reference position place is the second outmost turns track 914, and first track at place, target location is the first outmost turns track 916.This moment, step was in regular turn: in the mode of following rail focus point 116 is moved to preparation skip floor position 910 by reference position 914, and this preparation skip floor position 910 is compared with beginning position 914 and target location 916 more close center reference points 101.In the skip floor mode focus point 116 is moved to a corresponding skip floor position 912 by preparation skip floor position 910.At last, in the mode of following rail focus point 116 is moved to target location 916 by corresponding skip floor position 912.
Please refer to Figure 11, its explicit declaration is according to the synoptic diagram of the seven kind skip floor flow process of intelligent layer jump method on disc of a preferred embodiment of the present invention.When position 122 is further from center reference point 101 compared with the beginning in target location 124, determine the skip floor path for following rail, skip floor in regular turn and following the path of rail again.Step is in regular turn: at first focus point 116 is moved to preparation skip floor position, one on first reflection horizon 102 126 by reference position 122 in the mode of following rail, the address of preparation skip floor position 126 or time point than this reference position 122 more near center reference point 101.The corresponding skip floor position 128 that now moves to focus point 116 on second reflection horizon 104 by preparation skip floor position 126 in the skip floor mode, and the address of this corresponding skip floor position 128 or time point are identical with the address or the time point of preparation skip floor position 126.At last focus point 116 is moved to target location 124 by corresponding skip floor position 128 in the mode of following rail.
Please refer to Figure 12, its explicit declaration is according to the synoptic diagram of the eight kind skip floor flow process of intelligent layer jump method on disc of a preferred embodiment of the present invention.When position 132 is further from center reference point 101 compared with the beginning in target location 134, determine the skip floor path for following rail, skip floor in regular turn and following the path of rail again.Step is in regular turn: at first in the mode of following rail focus point 116 is moved to preparation skip floor position, one on first reflection horizon 102 136 by reference position 132, and the address of this preparation skip floor position 136 or time point are between the address or time point of reference position 132 and target location 134.The corresponding skip floor position 138 that now moves to focus point 116 on second reflection horizon 104 by preparation skip floor position 136 in the skip floor mode.At last, finish and focus on and focus point 116 is moved to target location 134 by corresponding skip floor position 138 in the mode of following rail.
Learn that by above-mentioned explanation the intelligent layer jump method of preferred embodiment of the present invention has the function that wisdom is judged, make CD player, determine a preferable skip floor path again at the preceding relative position of judging reference position and target location of carrying out focusing and skip in advance.And no matter this path why, and focus point all is to be positioned at the position of disc than inner ring when carrying out skip floor, therefore, can significantly promote the focusing probalility of success behind the skip floor, and effectively overcome the disappearance of known technology.Thus, the rotating speed of CD player can be accelerated again, and further promotes the speed of access data, makes the competitive power of integral product promote many.
In sum; though the present invention discloses as above with a preferred embodiment; right its is not in order to limit the present invention; anyly have the knack of this technician; without departing from the spirit and scope of the present invention; when can being used for a variety of modifications and variations, so protection scope of the present invention is as the criterion when the claim that look application defines.
Claims (4)
1. intelligent layer jump method, when being used for a CD player access one disc, this disc has a center reference point, at least one first reflection horizon and one second reflection horizon, and this first reflection horizon has a plurality of first tracks, this second reflection horizon has a plurality of second tracks, and this method comprises:
One laser beam of this CD player is focused on this first reflection horizon forming a focus point, and obtain an initial position;
Relatively this reference position be positioned at the relative position of the target location on this second reflection horizon, when this target location than this reference position more near this center reference point, prior to moving this focus point to one preparation skip floor position in the mode of crossing over those first tracks of part on this first reflection horizon, this preparation skip floor position is than more close this center reference point in this target location;
In the skip floor mode focus point is moved to a corresponding skip floor position on this second reflection horizon by this preparation skip floor position, this correspondence skip floor position is than more close this center reference point in this target location; And
On this second reflection horizon, this focus point is moved to this target location by this correspondence skip floor position in the mode of crossing over those second tracks of part.
2. intelligent layer jump method as claimed in claim 1 is characterized in that, wherein this disc is a digital multi disc in the double-deck reflection horizon of tool.
3. intelligent layer jump method as claimed in claim 1 is characterized in that, wherein the relative position of this reference position and this target location is to judge according to the mode of sector number.
4. intelligent layer jump method, when being used for a CD player access one disc, this disc has a center reference point, at least one first reflection horizon and one second reflection horizon, and this first reflection horizon has a plurality of first tracks, this second reflection horizon has a plurality of second tracks, and this method comprises:
One laser beam of this CD player is focused on this first reflection horizon forming a focus point, and obtain an initial position;
Relatively this reference position be positioned at the relative position of the target location on this second reflection horizon, when this target location than this reference position more near this center reference point, prior to moving this focus point to one preparation skip floor position toward the direction of this center reference point on this first reflection horizon, this preparation skip floor position than this target location further from this center reference point;
In the skip floor mode focus point is moved to a corresponding skip floor position on this second reflection horizon by this preparation skip floor position, this correspondence skip floor position than this target location further from this center reference point; And
On this second reflection horizon, this focus point is moved to this target location by this correspondence skip floor position.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100485564A CN100359572C (en) | 2004-06-08 | 2004-06-08 | Intelligent skipping method |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100485564A CN100359572C (en) | 2004-06-08 | 2004-06-08 | Intelligent skipping method |
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| CN1707634A CN1707634A (en) | 2005-12-14 |
| CN100359572C true CN100359572C (en) | 2008-01-02 |
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| CNB2004100485564A Expired - Fee Related CN100359572C (en) | 2004-06-08 | 2004-06-08 | Intelligent skipping method |
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| KR101304571B1 (en) * | 2006-02-24 | 2013-09-05 | 삼성전자주식회사 | Apparatus and method for playing optical disc |
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| CN1264896A (en) * | 1999-02-25 | 2000-08-30 | 索尼株式会社 | Disc driving device |
| CN1314675A (en) * | 2000-03-16 | 2001-09-26 | Lg电子株式会社 | Layer jump control equipment and method for multi-layer disc |
| CN1365492A (en) * | 2000-03-28 | 2002-08-21 | 松下电器产业株式会社 | Optical disc apparatus |
| WO2003010761A1 (en) * | 2001-07-26 | 2003-02-06 | Sony Corporation | Optical recording/reproducing apparatus, focusing method therefor, and optical disk recording medium |
| CN1399258A (en) * | 1996-07-10 | 2003-02-26 | 株式会社日立制作所 | CD device access method and device using said method |
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2004
- 2004-06-08 CN CNB2004100485564A patent/CN100359572C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1399258A (en) * | 1996-07-10 | 2003-02-26 | 株式会社日立制作所 | CD device access method and device using said method |
| CN1264896A (en) * | 1999-02-25 | 2000-08-30 | 索尼株式会社 | Disc driving device |
| CN1314675A (en) * | 2000-03-16 | 2001-09-26 | Lg电子株式会社 | Layer jump control equipment and method for multi-layer disc |
| CN1365492A (en) * | 2000-03-28 | 2002-08-21 | 松下电器产业株式会社 | Optical disc apparatus |
| WO2003010761A1 (en) * | 2001-07-26 | 2003-02-06 | Sony Corporation | Optical recording/reproducing apparatus, focusing method therefor, and optical disk recording medium |
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Owner name: GUANGBAO SCIENCE + TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: JIANXING ELECTRONIC SCIENCE +. TECHNOLOGY CO., LTD. Effective date: 20140626 |
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