CN1746996A - Optical record or regeneration system - Google Patents
Optical record or regeneration system Download PDFInfo
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- CN1746996A CN1746996A CN 200410054372 CN200410054372A CN1746996A CN 1746996 A CN1746996 A CN 1746996A CN 200410054372 CN200410054372 CN 200410054372 CN 200410054372 A CN200410054372 A CN 200410054372A CN 1746996 A CN1746996 A CN 1746996A
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Abstract
A light recording and regenerating system is featured as using existed high frequency and low frequency obtained by dividing high frequency to be 1/n to form double swing at magnetic rail of optical disc for recording or regenerating data on it and detecting signal of high and low frequency swing when optical disc is prepared; ensuring to use high times to record or regenerate data to record more information in swing with better result than linking, enabling to finalize stable record and regeneration operation under high frequency of swing when system is applied in recording and regenerating operation.
Description
[technical field]
The present invention is the technology of relevant optical recording or regenerative system, especially CD and the optical recording that detects dual swinging signal from this CD or the technology of regenerative system about having dual swinging structure.
[background technology]
Usually, CD (Compact Disc; CD) and the CD of digital versatile disc (Rewritable DigitalVersatile Disc:DVD) form, from cd centre's (interior week),, form single spirality record track to the end (periphery) of CD.
At this moment, CDs such as CD-R, CD-RW are the CD that can write down again, and CDs such as DVD-R/RW, DVD-RAM, DVD+R/RW are the DVD that can write down again.
Wherein, a groove record data at CD-R/RW and DVD-RW/R.At this moment, can only write down on 1 time the CD-R/DVD-R, be provided with and to write down 1 time recording film.
In addition, CD-RW/DVD-RW is provided with the recording film that can carry out duplicate record, and the recording mode of CD-RW/DVD-RW is phase transformation (Phase Change) recording mode, and their reflectivity by crystalline state and non-crystalline state poor carries out data recording.
In above-mentioned CD-R/RW and DVD-R/RW, planar tracks is made pre-pit (pre-pit), the positional information of the relevant groove track of record, and on planar tracks record data not.At this moment, the positional information that is positioned on the base station is called as land pre-pit (Land-pre-pit: be designated hereinafter simply as LPP) information.That is,, on base station, write down physical address information in advance about the groove track with the form of pit.
In addition, positional information also can be along the track interface, with swing (Wobbling) shape record data.So-called swing is meant, certain clock is carried out modulation treatment, and needs are recorded information on the CD, as the information of relevant position, the information of associated optical disc rotational speed, offer the power of laser diode, with variation by laser beam, record controls information on the track interface.
At this moment, the tracking error signal in LPP field carries out irregular movement along above-below direction in swinging signal.Therefore,, detect the LPP signal or the swinging signal that are recorded in advance on the base station, will detect the address information that shows track location if in CD-RW/R and DVD-RW/R.
Above-mentioned DVD-RAM is equal record data on the track of base station (Land) and groove (Groove), and divide track with a certain size unit area (being designated hereinafter simply as the sector), above-mentioned a plurality of sector (for example, 16 sectors) forms a module, and is unit record or regenerating information with the module.At this moment, the sector is made up of the identifying information field that is positioned at front end (being designated hereinafter simply as the header field) and the user profile field that links to each other with above-mentioned header field.The user profile field is called " record field " again, but the required information of this field recording user.In addition, in the header field, there are control informations such as sevtor address, random access, Spin Control with the form of pre-formatting.In view of the above, on the blank panel of recording information signal not, also can carry out tracking Control.
In addition, above-mentioned control information also can be swung the data recording of (Wobbling) shape along track.
As mentioned above, optical recording or regenerative system are when the blank panel identifying recording layer, and wobble detection signal, and generate recording address and writing speed clock from the swinging signal that detects is finished with this and write down or regenerative operation.
Fig. 1 is the single swinging signal structural representation that writes down on conventional formula re-recordable optical disc.On CD, be provided with the track (planar tracks or groove track) in user data field, the frequency of the specification specifies by above-mentioned planar tracks and groove track, record swing (Wobble) signal.
That is to say, according to the specification of every CD, the dynamic frequency that decision forms on the track interface.For example, CD-R/RW is with the warble track interface of 22.05 ± 1KHz, and DVD-R/RW is then with the warble track interface of 140.6KHz.In addition, DVD+R/RW and DVD-RAM are respectively with the warble track interface of 817KHz and 157KHz.
[summary of the invention]
During re-recordable optical disc identifying recording layer in routine techniques, preserve input signal, sampling and preservation (the Sample ﹠amp by sampling then in the demagnetization power region in the recording power zone; Hold is designated hereinafter simply as S/H) method, only at demagnetization power region wobble detection signal.At this, input signal is the optical detector (not shown) from optical pickup unit, to the reflected light information of CD outgoing beam point.If above-mentioned CD is for carrying out the CD of 1 record, the zone of wobble detection signal replaces the demagnetization power region by reading (Read) power region so.
Therefore, in the process of CD identifying recording layer, the swing detection signal that is easy to take place import from CD is by the phenomenon of thermalization.In addition, because of by to the part that generates pit with read (read) or demagnetization (erase) part is sampled and preserved to handle and generates swinging signal, so the loss of data phenomenon is very serious.
That is to say, if only use outside the recording power zone the zone (promptly, readout power zone in the time can carrying out the CD identifying recording layer of 1 record, the demagnetization power region in the time can carrying out the CD identifying recording layer of duplicate record) the wobble detection signal, the writing speed of CD is fast more, the stability of sampling and preservation signal will be low more, especially the CD that has the swing in high frequency performance is difficult to effective wobble detection signal.
As the explanation of above-mentioned example because the warble structure of DVD series is complicated more than CD series, so high power number scale record, just difficult more when record and regeneration the wobble detection signal.
In addition, be record more information or link more accurately in swing, hunting frequency is tending towards high frequencyization gradually, when this CD identifying recording layer, because of the variation of laser power, makes swing detection become more difficult.
If normally the wobble detection signal just can't accurately be grasped optical disc information, thus error is appearring aspect the Spin Control of the generation of tracer signal and CD, thus cause the recording quality difference and write down producing drawback in servo.When especially on the CD of swing in high frequency structure, carrying out the record of high power number scale, also can cause writing down the phenomenon of thermalization and CD wearing and tearing.
In order to address the above problem, the present invention aims to provide a track face at CD, with mutual different frequency, write down dual swinging signal, and when record or playback of data,, carry out the optical recording or the regenerative system of stable record and regeneration by detecting dual swinging signal.
To achieve these goals, optical recording of developing according to the present invention or regenerative system are made up of following structure: promptly,
Utilize the 1st hunting frequency and, can carry out the optical recording media of dual recorded in wobbles at the track interface with the 2nd hunting frequency of the 1st hunting frequency frequency division for 1/n; When enterprising line data record of optical recording media or regeneration, from the light reflected signal of optical recording media, generate the difference signal maker of difference signal; In above-mentioned difference signal, only let pass corresponding to the frequency content of the 1st swinging signal, to detect the 1st swing detection device of the 1st swinging signal; In above-mentioned difference signal, only let pass corresponding to the frequency content of the 2nd swinging signal, to detect the 2nd swing detection device of the 2nd swinging signal; From the 1st, the 2nd swinging signal of above-mentioned detection, the control signal maker of required control signal when generating data recording or regeneration.
The 1st swing detection device is by only letting pass corresponding to the frequency content of the 1st swinging signal, and the bandpass filter of getting rid of other frequency content is formed.
The 2nd swing detection device is by only letting pass corresponding to the frequency content of the 2nd swinging signal, and the bandpass filter of getting rid of other frequency content is formed.
With reference to other purpose, characteristics and the effect thereof of picture detailed description example of the present invention, will a further clear and definite understanding be arranged to this invention.
As mentioned above, optical recording among the present invention or regenerative system, by when making CD, utilize existing high frequency and with the low frequency of high frequency frequency division for 1/n, form dual swing at the track interface, and on CD with above-mentioned dual swinging structure characteristics record or during playback of data, detect high-frequency wobble signal and low-frequency wobble signal simultaneously, use it in record and the regenerative operation, guarantee to be connected (Linking) effect when more information and acquisition ratio link (Lick) more accurately with in swing, writing down with record of high power number scale or playback of data, and be tending towards gradually in hunting frequency under the situation of high frequencyization, also can stablize and detect low-frequency wobble signal exactly, to finish stable record or regenerative operation.Comparatively speaking, above-mentioned low-frequency wobble signal has stronger sampling and hold function, therefore only utilize outside the recording power the zone ((promptly, readout power zone, the demagnetization power region in the time can carrying out the CD identifying recording layer of duplicate record in the time can carrying out the CD identifying recording layer of 1 record)) during the wobble detection signal, also can carry out stable record controls, and reduce losing of data effectively.
By above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this invention technological thought.
Therefore, the technical scope of this invention is not limited to the content on the instructions, must determine its technical scope according to interest field.
[description of drawings]
Fig. 1 is the structural representation of the single swinging signal of conventional formula,
Fig. 2 is the dual swinging signal structural representation among the present invention,
Fig. 3 has on the CD of dual swinging structure in the present invention, optical recording that the wobble detection signal is required or regenerative system construction module figure,
Fig. 4 (a) is the swinging signal exemplary plot that detects on the CD with the single swinging structure of conventional formula,
Fig. 4 (b) and Fig. 4 (c) have high frequency and the low-frequency wobble signal exemplary plot that detects simultaneously on the CD of dual swinging structure in the present invention.
[embodiment]
Below with reference to accompanying drawings, structure and the effect thereof to the embodiment of the invention is elaborated.The structure and the effect that illustrate and illustrated in this instructions be an example explanation of this invention at least, but the technological thought of this invention and core texture thereof and effect are not limited to following several particular instance.
As shown in Figure 2, the present invention contains the dual swinging signal of the different frequency of optical disc information in the track interface record when making CD.In embodiments of the present invention, the 1st hunting frequency is utilized the existing swing in high frequency frequency record data of specification specifies, and the 2nd frequency is then utilized the frequency wobbles frequency record data of the 1st frequency division of the frequency for 1/n.At this moment, said n is represented numeral 16.
Fig. 2 is in the present invention, has required optical recording or the regenerative system construction module figure of wobble detection signal on the CD of above-mentioned dual swinging structure, has only pointed out the part of relevant swing detection here.
As shown in Figure 2, optical recording of developing according to the present invention or regenerative system are made up of following structure: promptly,
From optical pickup unit 10 among electric signal A, B, C, the D of output, generate read channel 2 signals read channel 2 makers 102; In reading channel 2 signals, only let pass, and detect the 1st swing detection device 103 of the 1st swinging signal corresponding to the frequency content of the 1st swinging signal; The 1st swinging signal that detects is given the 1st swing PLL device 104 of synchronised conversion (PLL); In reading channel 2 signals, only let pass, and detect the 2nd swing detection device 105 of the 2nd swinging signal corresponding to the frequency content of the 2nd swinging signal; The 2nd swinging signal that detects is given the 2nd swing PLL device 106 of synchronised conversion (PLL); Respectively from 104,106 outputs of the 1st, the 2nd swing PLL device, and by in the 1st, the 2nd swinging signal of synchronised conversion (PLL), the control signal maker 107 of generation video disc recording and the required control signal of regeneration.
In the embodiment of the invention with said structure characteristics, optical pickup unit 101 object lens light harvesting light beam is positioned on the signal track of CD, and will reflex to the light of signal recording surface, again light harvesting is handled on the object lens, then for detecting as the focus error signal of RF signal and servo error signal and read channel 2 signals, and it is incided in the optical detector.If optical detector is made up of 4 photodetectors (A, B, C, D) of cutting apart along the signal track direction and the radiation direction of CD, the reflected light information that from each photodetector, detects so, will be by photo-electric conversion element (not shown), convert to and detect electric signal A, B, C, the D that light quantity is directly proportional, and these electric signals A, B, C, D are imported into and read in channel 2 makers 102.
Read channel 2 makers 102 and can obtain electric signal, and above-mentioned channel 2 signals that read are processed processing, to obtain tracking error signal by the mode of (A+D)-(B+C).In addition, above-mentioned channel 2 signals that read will be imported in the 1st, the 2nd wobble signal detector 103,105.
The 1st swing detection device 103 is by only letting pass corresponding to the frequency content of the 1st swinging signal, and the bandpass filter of getting rid of other frequency content is formed.Shown in Fig. 4 (b), 103 pairs of the 1st swing detection devices are included in the 1st swinging signal that reads in channel 2 signals and detect.
The 2nd swing detection device 105 is by only letting pass corresponding to the frequency content of the 2nd swinging signal, and the bandpass filter of getting rid of other frequency content is formed.Shown in Fig. 4 (c), 105 pairs of the 2nd swing detection devices are included in the 2nd swinging signal that reads in channel 2 signals and detect.
That is to say, on CD, shown in Fig. 4 (a), only detect high-frequency wobble signal with the single swinging structure of conventional formula.But in the present invention, have on the CD of dual swinging structure, shown in Fig. 4 (b) and Fig. 4 (c), will detect high-frequency wobble signal simultaneously and be the low-frequency wobble signal of 1/n the high-frequency wobble signal frequency division.
At this moment, the 1st swinging signal will be imported in the 1st swing PLL device 104, and the 1st swing PLL device 104 converts the 1st swinging signal to the PLL signal, and be entered in the control signal maker 107.
The 2nd swinging signal will be imported in the 2nd swing PLL device 106, and the 2nd swing PLL device 106 converts the 2nd swinging signal to the PLL signal, and be entered in the control signal maker 107.
At this, why convert the 1st, the 2nd swinging signal to the PLL signal, be for solve because of CD in conjunction with etc. the former thereby normal problem of wobble detection signal, and for guaranteeing that phase place does not change because of base station track and groove track.That is, the PLL swinging signal is not subjected to the influence in base station track and groove track or header field, remains synchronous certain frequency.
Control signal maker 107 generates video disc recording and the required control signal of regeneration from the 1st, the 2nd swinging signal that converts the PLL signal to.
That is to say, be converted into the 1st, the 2nd swinging signal of PLL signal, will be with certain number of revolutions control CD, and can be when record or playback of data, obtain record with clock signal or regeneration clock signal.
For example, the swinging signal number that exists in each sector of DVD-RAM is identical all the time, so can generate the header shielded signal by calculating the number of PLL swinging signal.In addition, 180 degree phase differential can appear in the swinging signal in base station track and the groove track, so can use it in identification base station track or the groove track.
Owing to can from the PLL swinging signal, understand the rotational speed of current optical disc, therefore the live spindle of target velocity control faster.
Above-mentioned low-frequency wobble signal, promptly the 2nd swinging signal has stronger sampling and hold function relatively, therefore can carry out stable record controls.
Above-mentioned control signal maker 107 can generate control signal from the PLL analog wobble signal, and above-mentioned PLL analog wobble signal can be given digitized processing, therefrom generates control signal then.
Claims (6)
1, optical recording or regenerative system comprise:
Utilize the 1st hunting frequency and, can carry out the optical recording media of dual recorded in wobbles at the track interface with the 2nd hunting frequency of the 1st hunting frequency frequency division for 1/n;
When enterprising line data record of optical recording media or regeneration, from the light reflected signal of optical recording media, generate the difference signal maker of difference signal;
In above-mentioned difference signal, only let pass corresponding to the frequency content of the 1st swinging signal, to detect the 1st swing detection device of the 1st swinging signal;
In above-mentioned difference signal, only let pass corresponding to the frequency content of the 2nd swinging signal, to detect the 2nd swing detection device of the 2nd swinging signal;
From the 1st, the 2nd swinging signal of above-mentioned detection, the control signal maker of required control signal when generating data recording or regeneration.
2, optical recording as claimed in claim 1 or regenerative system is characterized in that,
The 2nd hunting frequency should be the 1st frequency division of the frequency to be treated to 1/16 low frequency.
3, optical recording as claimed in claim 1 or regenerative system is characterized in that,
The difference signal that generates from the difference signal maker should be to read channel 2 signals.
4, optical recording as claimed in claim 1 or regenerative system is characterized in that,
The 1st swing detection device should be by only letting pass corresponding to the frequency content of the 1st swinging signal, and the bandpass filter of getting rid of other frequency content is formed.
5, optical recording as claimed in claim 1 or regenerative system is characterized in that,
The 2nd swing detection device should be by only letting pass corresponding to the frequency content of the 2nd swinging signal, and the bandpass filter of getting rid of other frequency content is formed.
6, optical recording as claimed in claim 1 or regenerative system is characterized in that,
Between the 1st, the 2nd swing detection device and control signal maker, the 1st, the 2nd swing PLL device that the 1st, the 2nd swinging signal can be converted to the PLL signal should be set also.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410054372 CN1746996A (en) | 2004-09-08 | 2004-09-08 | Optical record or regeneration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410054372 CN1746996A (en) | 2004-09-08 | 2004-09-08 | Optical record or regeneration system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1746996A true CN1746996A (en) | 2006-03-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410054372 Pending CN1746996A (en) | 2004-09-08 | 2004-09-08 | Optical record or regeneration system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1746996A (en) |
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- 2004-09-08 CN CN 200410054372 patent/CN1746996A/en active Pending
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