CN100349217C - CD machine capable of compensating rocking location signal and its method - Google Patents
CD machine capable of compensating rocking location signal and its method Download PDFInfo
- Publication number
- CN100349217C CN100349217C CNB2004100869475A CN200410086947A CN100349217C CN 100349217 C CN100349217 C CN 100349217C CN B2004100869475 A CNB2004100869475 A CN B2004100869475A CN 200410086947 A CN200410086947 A CN 200410086947A CN 100349217 C CN100349217 C CN 100349217C
- Authority
- CN
- China
- Prior art keywords
- signal
- light beam
- wig
- objective lens
- migration parameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The present invention relates to a CD machine capable of compensating rocking location signals and a method thereof. The method of compensating rocking location signals is used for an optical read-write head and a servo controller, wherein the optical read-write head comprises a laser diode, an optical detector and an objective lens. Firstly, the laser diode emits a light beam which is focused to a CD by the objective lens, and a reflected beam is generated; subsequently, the optical detector receives the reflected beam and generates a plurality of electrical signals; then, the electrical signals are received by one servo controller, and a deviation parameter is generated. When the absolute value of the deviation parameter is larger than a fixed value, the objective lens is moved according to the deviation parameter, the optical detector continues receiving the reflected beam and generates the electrical signals until the absolute value of the deviation parameter is less than or equal to the fixed value; the optical detector receives the reflected beam and generates a plurality of correction electrical signals; finally, a rocking location signal is generated according to the correction electrical signals.
Description
Technical field
But the invention relates to a kind of method of compensating rocking location signal, but and particularly relevant for the method and the CD player thereof of compensating rocking location signal.
Background technology
The mode that discs stores data is that many concavo-convex tracks are arranged in the surface, and optical read head is launched a laser beam to above-mentioned track, receives the laser light of track reflection again, stores data with read-write.Generally speaking, recessed rail on the discs and protruding rail are the tracks for edge-smoothing.But some specific discs specification now, as CD-R, DVD-R or DVD-RW etc., its rail flanges has the track that waves as the wave, and its track is called the rocking location mark, the signal of reading is called and waves (Wobble) addressing signal, and definable goes out the data corresponding address of CD.
Therefore in the reading/writing document process, it is very important that rocking location signal just becomes.If rocking location signal instability or quality are undesirable, promptly can't determine the data corresponding address, make mistakes with regard to as easy as rolling off a log in the process of read-write, make the discs burning failure.
Summary of the invention
Supervise in this, but purpose of the present invention is exactly in CD player that a kind of compensating rocking location signal is provided and method thereof, can produce migration parameter by the rocking location mark on the discs, again according to the migration parameter compensating rocking location signal, and the quality of stabilization signal, and then in the read-write process, be difficult for makeing mistakes and make the upgrading success rate of burning.
According to purpose of the present invention, the present invention proposes a kind of method of compensating rocking location signal, is used to read an optical read/write head of a discs, and this optical read/write head comprises a laser diode, an optical detector and an objective lens, it is characterized in that this compensation method comprises:
This laser diode is launched a light beam, and this light beam focuses to this discs and produces a folded light beam via this objective lens;
This optical detector receives this folded light beam, and produces one first wig-wag signal A, one second wig-wag signal B, one the 3rd wig-wag signal C and one the 4th wig-wag signal D;
Receive described four electric signal and produce a migration parameter with a servo controller, and this migration parameter is (A+D)-(B+C) according to described four electric signal;
When the absolute value of this migration parameter during greater than a fixed value, move this objective lens according to this migration parameter, and repeat the step that above-mentioned this optical detector receives this folded light beam and produces one first wig-wag signal A, one second wig-wag signal B, one the 3rd wig-wag signal C and one the 4th wig-wag signal D, be not more than up to the absolute value of this migration parameter and equal this fixed value, the electric signal after this optical detector receives this folded light beam and produces a plurality of corrections; And
Produce a rocking location signal according to the electric signal after described a plurality of corrections.
Wherein this discs has a plurality of tracks, this light beam be via this objective lens focus to this discs described a plurality of tracks produce this folded light beam in the lump, this track has a plurality of rocking location marks.
Wherein when the absolute value of this migration parameter during greater than a fixed value, this objective lens is according to this migration parameter move left and right.
The present invention proposes the CD player of a compensating rocking location signal, in order to read and write a discs, it is characterized in that, this CD player comprises:
One servo controller; And
One optical read/write head electrically connects with this servo controller, and this optical read/write head comprises:
One laser diode is in order to launch a light beam;
One objective lens is in order to focus on this light beam to this discs; And
One optical detector in order to receiving the folded light beam that this discs produces according to this light beam, and is exported one first wig-wag signal A, one second wig-wag signal B, one the 3rd wig-wag signal C and one the 4th wig-wag signal D according to this;
Wherein, after this servo controller receives described four electric signal, produce a migration parameter according to this, and this migration parameter is (A+D)-(B+C), when the absolute value of this migration parameter during greater than a fixed value, this servo controller moves this objective lens according to this migration parameter, and make this optical detector continue to receive this folded light beam and produce described four electric signal, when the absolute value of this migration parameter is not more than this fixed value, this optical detector receives the electric signal after this folded light beam is exported a plurality of corrections according to this, and produces a rocking location signal by the electric signal of this servo controller after according to described a plurality of corrections.
Wherein this discs has a plurality of tracks, this light beam be via this objective lens focus to this discs described a plurality of tracks produce this folded light beam in the lump, this track has a plurality of rocking location marks.
Wherein this objective lens is according to this migration parameter move left and right.
Description of drawings
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below especially exemplified by a preferred embodiment, and conjunction with figs. is described in detail below, wherein:
Fig. 1 illustrates the CD player Organization Chart of figure according to a preferred embodiment of the present invention.
Fig. 2 A, 2B, illustrate and be the structure of optical detector and the image of folded light beam with 2C.
Fig. 3 illustrates the compensation method process flow diagram of figure according to a preferred embodiment of the present invention.
Embodiment
Please refer to Fig. 1, it illustrates is CD player Organization Chart according to a preferred embodiment of the present invention.CD player 100 comprises optical read head 110 and servo controller 120.Optical read/write head 110 electrically connects with servo controller 120.Optical read head 110 comprises laser diode 111, objective lens 113 and optical detector 115.Laser diode 111 is in order to launch a light beam.Objective lens 113 in order to focused beam to discs 130.Optical detector 115 in order to the folded light beam of reception discs 130 according to the light beam generation, and is exported a plurality of electric signal according to this.In general, comprise at least 4 light detecing elements on the optical detector 115, each light detecing element receives folded light beam individually, and output other electric signal, as illustrating of Fig. 2 A, has optical element 115a in the optical detector 115 in order to produce the first wig-wag signal A, optical element 115b in order to produce the second wig-wag signal B, optical element 115c in order to produce the 3rd wig-wag signal C and optical element 115d in order to produce the 4th wig-wag signal D.And in the optical read head 110, also comprise polariscope 117, in order to laser diode 111 emitted light beams are refracted to objective lens 113,, repeat no more because of non-present embodiment emphasis.
After servo controller 120 receives electric signal, produce migration parameter according to this.And electric signal comprises the first wig-wag signal A, the second wig-wag signal B, the 3rd wig-wag signal C and the 4th wig-wag signal D, and migration parameter then is defined as (A+D)-(B+C), and utilizes migration parameter to decode to produce a rocking location signal.Please refer to Fig. 2 B and Fig. 2 C, when the optical detector 115 of optical read/write head owing to proofread and correct inaccurate or the like factor when making, make the luminous point (shown in the dotted line) of folded light beam can stably be partial to, perhaps as Fig. 2 C optical element 115b and optical element 115c one side as Fig. 2 B optical element 115a and optical element 115d one side.At this moment, the absolute value of migration parameter can be greater than zero, if with this migration parameter rocking location signal of decoding, its wrong incidence (Error Rate) can be very high, that is to say, can't effectively produce rocking location signal.
Therefore, the present invention is when applying to absolute value when migration parameter greater than a fixed value, servo controller 120 moves objective lens 113 according to migration parameter, is move left and right for example, and makes optical detector 115 continue to receive folded light beam and produce described a plurality of electric signal.Absolute value up to migration parameter is not more than fixed value.At this moment, optical detector 115 folded light beam that receives is exported the electric signal after a plurality of corrections according to this, makes servo controller 120 produce a rocking location signal according to the correction parameter that electric signal produced after proofreading and correct.Wherein, if more require the degree of accuracy of rocking location signal, can set this fixed value is zero.And discs 130 has a plurality of tracks, and light beam promptly focuses to a track wherein of discs 130 via objective lens 113, and produces folded light beam, and this track has a plurality of rocking location marks.
Please refer to Fig. 3, it illustrates the compensation method process flow diagram according to a preferred embodiment of the present invention.Be used for an optical read head, optical read head comprises laser diode, objective lens and optical detector.At first, laser diode is launched a light beam, and after light beam focused to a discs via objective lens, discs produced folded light beam, shown in step 21.Then optical detector receives folded light beam, and produces a plurality of electric signal, shown in step 23.Receive electric signal and produce a migration parameter with a servo controller afterwards, shown in step 25 according to electric signal.
Judge that whether the absolute value of migration parameter is greater than a fixed value, shown in step 26 this moment.If the absolute value of migration parameter during greater than a fixed value, then moves objective lens according to migration parameter, shown in step 27, lay equal stress on and cover step 23, step 25 and step 26, up to the absolute value of migration parameter less than fixed value.When the absolute value of migration parameter during smaller or equal to fixed value, folded light beam that optical detector receives also produces electric signal after proofreading and correct, shown in step 28.At last, produce rocking location signal according to the electric signal after proofreading and correct, shown in step 29.Wherein, if more require the degree of accuracy of rocking location signal, can set this fixed value is zero.
Discs described in the step 21 has a plurality of tracks, and light beam is to focus to a discs track wherein via objective lens, and produces folded light beam, and this track has a plurality of rocking location marks.The electric signal that produces in the step 23 comprises the first wig-wag signal A, the second wig-wag signal B, the 3rd wig-wag signal C and the 4th wig-wag signal D in the present embodiment.And in step 25, migration parameter then is defined as (A+D)-(B+C).In step 27, objective lens is move left and right according to migration parameter.
But the CD player of the disclosed compensating rocking location signal of the above embodiment of the present invention and method thereof, the pass that sees through electric signal is the formula compensating rocking location signal, make when the writable disc sheet, can determine the data corresponding address, and be difficult for because of the corresponding wrong burning failure that causes in data position.And this compensation method must not increase extra device or circuit, quite meets economic benefit.
In sum; though the present invention discloses as above with a preferred embodiment; right its is not in order to limit the present invention; any personage who has the knack of this technology; 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 when looking accompanying being as the criterion that claim defines.
Claims (6)
1. the method for a compensating rocking location signal is used to read an optical read/write head of a discs, and this optical read/write head comprises a laser diode, an optical detector and an objective lens, it is characterized in that, this compensation method comprises:
This laser diode is launched a light beam, and this light beam focuses to this discs and produces a folded light beam via this objective lens;
This optical detector receives this folded light beam, and produces one first wig-wag signal A, one second wig-wag signal B, one the 3rd wig-wag signal C and one the 4th wig-wag signal D;
Receive described four electric signal and produce a migration parameter with a servo controller, and this migration parameter is (A+D)-(B+C) according to described four electric signal;
When the absolute value of this migration parameter during greater than a fixed value, move this objective lens according to this migration parameter, and repeat the step that above-mentioned this optical detector receives this folded light beam and produces one first wig-wag signal A, one second wig-wag signal B, one the 3rd wig-wag signal C and one the 4th wig-wag signal D, be not more than up to the absolute value of this migration parameter and equal this fixed value, the electric signal after this optical detector receives this folded light beam and produces a plurality of corrections; And
Produce a rocking location signal according to the electric signal after described a plurality of corrections.
2. the method for compensating rocking location signal as claimed in claim 1, it is characterized in that, wherein this discs has a plurality of tracks, this light beam be via this objective lens focus to this discs described a plurality of tracks produce this folded light beam in the lump, this track has a plurality of rocking location marks.
3. the method for compensating rocking location signal as claimed in claim 1 is characterized in that, wherein when the absolute value of this migration parameter during greater than a fixed value, this objective lens is according to this migration parameter move left and right.
4. the CD player of a compensating rocking location signal in order to read and write a discs, is characterized in that, this CD player comprises:
One servo controller; And
One optical read/write head electrically connects with this servo controller, and this optical read/write head comprises:
One laser diode is in order to launch a light beam;
One objective lens is in order to focus on this light beam to this discs; And
One optical detector in order to receiving the folded light beam that this discs produces according to this light beam, and is exported one first wig-wag signal A, one second wig-wag signal B, one the 3rd wig-wag signal C and one the 4th wig-wag signal D according to this;
Wherein, after this servo controller receives described four electric signal, produce a migration parameter according to this, and this migration parameter is (A+D)-(B+C), when the absolute value of this migration parameter during greater than a fixed value, this servo controller moves this objective lens according to this migration parameter, and make this optical detector continue to receive this folded light beam and produce described four electric signal, when the absolute value of this migration parameter is not more than this fixed value, this optical detector receives the electric signal after this folded light beam is exported a plurality of corrections according to this, and produces a rocking location signal by the electric signal of this servo controller after according to described a plurality of corrections.
5. the CD player of compensating rocking location signal as claimed in claim 4, it is characterized in that, wherein this discs has a plurality of tracks, this light beam be via this objective lens focus to this discs described a plurality of tracks produce this folded light beam in the lump, this track has a plurality of rocking location marks.
6. the CD player of compensating rocking location signal as claimed in claim 4 is characterized in that, wherein this objective lens is according to this migration parameter move left and right.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100869475A CN100349217C (en) | 2004-10-20 | 2004-10-20 | CD machine capable of compensating rocking location signal and its method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100869475A CN100349217C (en) | 2004-10-20 | 2004-10-20 | CD machine capable of compensating rocking location signal and its method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1763851A CN1763851A (en) | 2006-04-26 |
| CN100349217C true CN100349217C (en) | 2007-11-14 |
Family
ID=36747947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100869475A Expired - Fee Related CN100349217C (en) | 2004-10-20 | 2004-10-20 | CD machine capable of compensating rocking location signal and its method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100349217C (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1173705A (en) * | 1996-04-02 | 1998-02-18 | 索尼株式会社 | Optical recording medium, method for recording/reproducing optical recording medium and apparatus for recording/reproducing optical recording medium |
| CN1233041A (en) * | 1998-01-16 | 1999-10-27 | 三菱电机株式会社 | Method of and apparatus for optical information reproduction |
| CN1129122C (en) * | 1997-08-30 | 2003-11-26 | Lg电子株式会社 | Tracking control method and apparatus and recording medium adaptive to the same |
| US6657930B1 (en) * | 1999-11-02 | 2003-12-02 | Pioneer Corporation | Tracking control circuit for tracking a wobbling track formed on an optical recording medium |
| CN1497542A (en) * | 2002-10-10 | 2004-05-19 | 索尼株式会社 | Disk drive and testing method for preset pit |
| CN1525446A (en) * | 2003-01-28 | 2004-09-01 | 威盛电子股份有限公司 | Apparatus and method for generating swing signal |
-
2004
- 2004-10-20 CN CNB2004100869475A patent/CN100349217C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1173705A (en) * | 1996-04-02 | 1998-02-18 | 索尼株式会社 | Optical recording medium, method for recording/reproducing optical recording medium and apparatus for recording/reproducing optical recording medium |
| CN1129122C (en) * | 1997-08-30 | 2003-11-26 | Lg电子株式会社 | Tracking control method and apparatus and recording medium adaptive to the same |
| CN1233041A (en) * | 1998-01-16 | 1999-10-27 | 三菱电机株式会社 | Method of and apparatus for optical information reproduction |
| US6657930B1 (en) * | 1999-11-02 | 2003-12-02 | Pioneer Corporation | Tracking control circuit for tracking a wobbling track formed on an optical recording medium |
| CN1497542A (en) * | 2002-10-10 | 2004-05-19 | 索尼株式会社 | Disk drive and testing method for preset pit |
| CN1525446A (en) * | 2003-01-28 | 2004-09-01 | 威盛电子股份有限公司 | Apparatus and method for generating swing signal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1763851A (en) | 2006-04-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2002157750A (en) | Optical disk unit and information recording and reproducing method | |
| US20070256088A1 (en) | Image information detecting apparatus | |
| US7218588B2 (en) | Disk apparatus, data recording method, and data reproduction method for continuous data processing | |
| CN100349217C (en) | CD machine capable of compensating rocking location signal and its method | |
| US20070217306A1 (en) | Optical disc apparatus and method of writing information to an optical disc | |
| US20070211594A1 (en) | Method of compensating for write power of a light source in an optical disk apparatus and optical disk apparatus using the method | |
| US20080212457A1 (en) | Scanning Of Multi-Layer Optical Record Carriers | |
| CN100435220C (en) | Light disk apparatus capable of compensating swinging addressing signal and method thereof | |
| US20060193218A1 (en) | Method of selecting laser beam in an optical disk drive | |
| TWI303807B (en) | An optical disk drive for compensating wobble signal and method thereof | |
| US8120999B2 (en) | Optical disc apparatus and defocus correcting method | |
| JP3155364B2 (en) | Optimal recording power determination method and optical disk device | |
| US7035176B2 (en) | Method and device for timely outputting focusing completion signal to realize focusing condition of optical pickup head | |
| CN101174432B (en) | Burning policy control method and information burning device | |
| US8018807B2 (en) | Method and apparatus of compensating for misalignment in an optical disk device | |
| US8526289B2 (en) | Optical information reproducing apparatus and optical information reproducing method | |
| US20110158078A1 (en) | Optical pickup device and focus jump method | |
| CN100487440C (en) | Apparatus for sensing defect of optical disk | |
| US8009533B2 (en) | Optical disc apparatus, a method of performing an optical power study of an optical disc apparatus, and a method of detecting a writing power of an optical disc apparatus | |
| CN100501847C (en) | Optical pickup device | |
| CN103035259A (en) | Optical recording device and method | |
| US20060077823A1 (en) | System and method for automatically calibrating light emitting device | |
| TW200606873A (en) | Optical reader/writer with dedicated focus tracking beam | |
| US8045439B1 (en) | System and method for storing data to an optical recording device | |
| JP2006221756A (en) | Optical pickup device and optical disk drive device comprising the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071114 Termination date: 20091120 |