CN1400586A

CN1400586A - Method for raising etch-recorded excellence rate of etch-recordable optical disk and its device

Info

Publication number: CN1400586A
Application number: CN 01124732
Authority: CN
Inventors: 蔡清雄; 陈建达; 简君文
Original assignee: Discovision Associates
Current assignee: Discovision Associates
Priority date: 2001-07-26
Filing date: 2001-07-26
Publication date: 2003-03-05

Abstract

The invention provides a method for advancing excellence rate of recordable disk, its lies in that it uses the wave from data which writes in radio frequency signal to adjust the recording speed and the recording lingering time table. The devices include: electrical level comparer, limitr, phase comparer, upper limiting filter, it eliminates the wave of low frequency datum line of the reflected radio frequency signal and forms a dynamic time deviate; and a excellence rate control microprocessor, it adjusts the output power, recording lingering time table and rotate speed of principle axle electric machine according to the output of electrical level comparer, dynamic time deviate and cyclic redundancy check code.

Description

Be used to promote the method and the device of etch-recordable optical disk etch-recorded excellence rate

Technical field

The present invention is used to improve etch-recordable optical disk (CD-Recordable) (CD-R) method and the device of etch-recorded excellence rate (recordable yield) about a kind of, and its quality according to discs is adjusted etch-recording speed to improve imprinting quality and acceptance rate.

Background technology

After the etch-recordable optical disk standard that the orange paper that Philips company (Philip Co.) formulated in nineteen ninety defines was widely used in CD (CD) technology, constantly the etch-recordable optical disk of development became the standard outfit in the personal computer gradually.The principle of work of etch-recordable optical disk (CDRW) is to burn the jog (pit and land) that can read at blank CD (blank CD) with the laser beam of high wattage.Because this jog can present the reflected light with signal errors after laser radiation, therefore can read by general CD player.For engraving data to a blank CD, on this blank CD surface, be coated with the dyestuff that one deck can be changed material by laser in the sputter mode, for example, cyanine dye and azo metal dye.

In addition, in the development of etch-recordable optical disk, successively writing pattern with constant linear velocity and constant angular velocity two is the development center of gravity.But the greatest problem of imprinting disc success ratio comes from the difference of disc quality at present.Even the disc quality of same identification code (with batch manufacturer), because of the allotment of each dye-coating and the factors such as operation of sputter, also difference to some extent, and then influence absorption and the reflection of disc to laser, especially high-energy imprinting laser absorption is decomposed the radiofrequency signal distortion (transform) that the variation that is produced can make formation with dyestuff.For example, but at present the CLV carving method be change luminous power control (running OPC:running optical power control).This change luminous power control utilizes read/write head (pickup) to monitor from inside to outside to write first (after this being called A), second (after this being called B), the 3rd (after this being called C) level of radiofrequency signal (WRF:Write Radio Frequency) to adjust the laser power of bright dipping.The greatest problem of this method is: not all disc can obtain A, B, the C level of desirable WRF in the laser power of constant speed downward modulation lay the grain.Just, aforementioned dyestuff with sputter coating is if when having sizable difference inside and outside disc, and for example, thickness and uniformity coefficient then singly are that constant speed is A, B, the C level that can't adjust required WRF.In CAV imprinting pattern, the clock of EFM is to change in the cycle with wig-wag signal on the disc (wobble signal).And, read/write head the difference of the tangential velocity of every bit must be in good time give suitable imprinting time delay.Simultaneously, this imprinting must be set up respectively on the rotating speed of each different main motor time delay.After data are downloaded to the scrambler of etch-recordable optical disk from main frame, being encoded into the EFM signal, the laser energy control by read/write head with EFM pattern (pattern) imprinting to disc.The RF signal that reflects simultaneously in imprinting is called WRF.The shape of WRF changes because of laser speed, imprinting delay and disc temperature.Modern is example with the edge dislocation that heat affecting was caused in the disc imprinting (Edge Shift by Thermal Interference), is shown in Fig. 1 and Fig. 2 respectively.Fig. 1 moves result schematic diagram behind the WRF signal edge.Fig. 2 moves after the WRF signal leading edge and trailing edge reach result schematic diagram.Shown in Fig. 1 and 2, when taking out after its logic changes as feedback signal and through signal Processing, be carved into EFM signal pattern (pattern) signal of scrambler (not shown) relatively with as the reference that measures dynamic time deviation (jitter) value Error1 and Error2 with former with a radiofrequency signal.Then, take out the WRF signal by data slice (data slice) and promptly represent the actual pattern length of imprinting at disc by (Sliced)

WRF

1,2 in blocks.At last, utilize a low passband ripple device to take out the WRF in

blocks

1,2 and

EFM

1,2 results through bit comparison mutually of scrambler, it is the datum of a phase error.When imprinting, no matter be that CD-R or CD-RW are to use laser energy to calorify on the dyestuff, traditional approach, the marginal position of physics concave surface (physical pit) signal is according to the temperature decision of beginning imprinting, if during the concave surface signal that imprinting is grown, the disc temperature rests on the time lengthening of high temperature, therefore, laser energy closes the temperature of having no progeny and can not descend immediately, so move behind the

output EFM signal

1,2 of the edge of

WRF signal

1,2 in blocks with respect to scrambler.Otherwise, if WRF signal trailing edge reach situation among Fig. 2 then can take place than weak point in imprinting.Above-mentioned condition all can produce dynamic time deviation (Jitter) value Error1 and Error2.Therefore must improve by adjusting imprinting delay and laser energy.If can't improve via said method, then must reduction of speed.In addition, among Fig. 1, also show A, B, C level value according to orange paper (Orange Book) the obtained WRF of standard.The waveform of WRF (profile) is relevant with the dyestuff crystallization degree of depth, and the dyestuff crystallization degree of depth is relevant with the symmetry of time delay (3T-11T) radio frequency waveform.If under high speed, can't utilize to write laser power and obtain required A, B, C level value, then must reduction of speed.Yet, but be that the CLV imprinting technology of present constant speed is beyond one's reach for the requirement of reduction of speed.

Therefore, the purpose of this invention is to provide a kind of method and device that is used to promote the etch-recordable optical disk etch-recorded excellence rate, it can adjust etch-recording speed neatly according to the disc quality in the imprinting process, improves the imprinting quality and increases acceptance rate with this.

Summary of the invention

The invention provides a kind of method and device that is used to promote the etch-recordable optical disk etch-recorded excellence rate, it adjusts etch-recording speed to reach the optimization acceptance rate according to imprinting energy, imprinting delay and disc temperature in the imprinting process.This method comprises the following steps: the number of times of the input error-detecging code that is out of one's reckoning; If incorrect input error-detecging code number of times surpasses one first preset value, then reduce present writing speed; First, second and third signal level that to import is respectively compared with first, second and third default signal level; Adjust Writing power according to above-mentioned comparative result; Adjust write latency according to input dynamic time deviate; According to the write latency of the Writing power of this adjustment and this adjustment adjust present etch-recording speed and time delay table with the rotating speed of control spindle drive motor and the write operation of read/write head.This device comprises: a level comparator, and compare with first, second and third default signal level in order to first, second and third signal level that will import respectively, and export each comparative result; One limiter (slicer) is converted to binary signal to take out the radiofrequency signal waveform of this reflection in order to the radiofrequency signal (write radio frequency) with reflection; One phase comparator, in order to the radiofrequency signal waveform of binary reflection with compare with the marking signal waveform of 8/14 modulation method (eight-to-fourteen modulation) and produce a phase error output signal; One low-pass filter is in order to utilize this phase error output signal to remove the low frequency datum line fluctuation (low frequency baseline fluctuation) in the radiofrequency signal that is included in this reflection and to produce a dynamic time deviate; An and acceptance rate control microprocessor, adjust the read/write head output power in order to respectively export result, this dynamic time deviate and a cyclic redundancy check error-detecging code (cyclic redundancy check), the rotating speed of imprinting table time delay and spindle drive motor according to this level comparator.

Description of drawings

For allow above-mentioned and other purpose of the present invention, feature, can be more apparent with advantage, a preferred embodiment cited below particularly, and conjunction with figs. are described in detail below:

Fig. 1 moves result schematic diagram behind the WRF signal edge;

Fig. 2 moves after the WRF signal leading edge and trailing edge reach result schematic diagram;

Fig. 3 is a structural representation of the present invention;

Fig. 4 is the inventive method process flow diagram; And

Fig. 5 is the embodiment according to Fig. 4.

[symbol description]

31 level comparators, 32 limiters, 33 phase comparators, 34 low-pass filters, 35 acceptance rates control microprocessor.

The specific embodiment mode

Fig. 3 structural representation of the present invention.In Fig. 3, this device comprises: a level comparator 31; One limiter (slicer) 32; One phase comparator 33; One low-pass filter 34; An and acceptance rate control microprocessor 35.As shown in Figure 3, read/write head reads A, B and 3 signal level (not shown)s of C according to the orange paper definition during imprinting, and respectively with A, B and the input of C signal level chosen, utilize inner comparer c1, c2 and c3, with after former default A, B that is carved into and C signal level compare, the error that is relatively produced is output as signal Error A, Error B and Error C respectively respectively.This limiter 32 is converted to binary signal BIN in order to radiofrequency signal (write) WRF with reflection.This phase comparator 33 is used as the adjustment reference of imprinting table time delay in order to the radiofrequency signal BIN phase place of binary reflection and encoded device (not shown) are compared with the marking signal EFM phase place of 8/14 modulation method coding to produce a phase differential output signal ERR1.This low-pass filter 34 utilizes the output signal ERR1 of this phase comparator to remove the low frequency datum line fluctuation in the radiofrequency signal that is included in this reflection and produce a dynamic time deviate JIT.This acceptance rate control microprocessor 35 is in order to respectively to export the rotating speed that result, this dynamic time deviate and a cyclic redundancy check error-detecging code CRCERR adjust read/write head output power and spindle drive motor according to this level comparator.

Fig. 4 the inventive method process flow diagram.In Fig. 4, this method is implemented in the acceptance rate control microprocessor of Fig. 3.As shown in Figure 4, this method comprises the following steps: the number of times (S41) of the input error-detecging code that is out of one's reckoning; If incorrect input error-detecging code number of times surpasses one first preset value, then reduce present writing speed (S42); First, second and third signal level that to import is respectively compared with default first, second and third signal level (S43); Adjust Writing power (S44) according to above-mentioned relative error; Dynamic time deviate according to input is adjusted write latency (S45); According to the write latency of the Writing power of this adjustment and this adjustment adjust present etch-recording speed and time delay table with the rotating speed of control spindle drive motor and the write operation (S46) of read/write head.

Fig. 5 is according to the embodiment of Fig. 4.As shown in Figure 5, check error-detecging code CRC whether correctly (S51); If CRC is incorrect, then utilize one first counter add 1 and first counter CRCNG value of including of judging this progression whether greater than one first preset value (S53), for example, CRCNG＞5; If the CRCNG value of including is greater than this first preset value, but then reset this first counter CRCNG and the present etch-recording speed (S54) of reduction; Default A, B, C signal level error amount error A, B, the C that the back produces that compare with sampling A, B, C signal level respectively imported (S55) respectively; Whether the error amount error A, B, C that judges this input suitable (S56); If error amount error A, B, C are suitable, one second counter Count1 (S57) then resets; If error amount error A, B, C are improper, then adjust Writing power and this second counter Count1 is added 1 (S58) with respect to error amount error A, B, C; Whether judge this second counter Count1 value of including greater than one second preset value (S59), for example, Count1＞8; If this Count1 value of including is greater than this second preset value, then reset this second counter and one the 3rd counter Count2, reduce spindle drive motor speed, updating delay timetable and recording power (S60); Import a dynamic time deviate JIT (S61); Judge this dynamic time deviate JIT whether suitable (S62); If JIT is suitable for value, the 3rd counter Count2 (S63) resets; If JIT is improper for value, then adjusts write latency and the 3rd counter Count2 is added 1 (S64) with respect to this value JIT; Whether judge the 3rd counter Count2 value of including greater than one the 3rd preset value (S65), for example, Counnt2＞8; If the 3rd counter Count2 value of including is greater than the 3rd preset value, execution in step S60 then; Judge whether this second and third counter is zero (S66); If both are all zero, execution in step S70; If both are all zero, then adjust write error and a four-counter Count3 is added 1 (S67); Whether judge this four-counter Count3 value of including greater than one the 4th preset value (S68), for example, Count3＞10; If this four-counter Count3 value of including is greater than the 4th preset value, this four-counter Count3 that resets, increases spindle drive motor speed and upgrade this table time delay (S69); If this four-counter Count3 value of including is not greater than the 4th preset value, but this four-counter Count3 that resets also keeps present etch-recording speed and shows content (S70) present time delay.

Though the present invention with preferred embodiment openly as above; right its is not in order to limit the present invention; any those skilled in the art; under situation without departing from the spirit or scope of the invention; can change and improvement, so protection scope of the present invention is with being as the criterion that the accompanying Claim scope limits.

Claims

1. a method that is used to promote the etch-recordable optical disk acceptance rate is characterized in that, utilizes a Wave data that writes radiofrequency signal to adjust an etch-recording speed and imprinting table time delay.

2. method that is used to promote the etch-recordable optical disk acceptance rate comprises the following steps: the number of times of the input error-detecging code that is out of one's reckoning;

If incorrect input error-detecging code number of times surpasses one first preset value, then reduce present writing speed;

First, second and third signal level that to import respectively compares with first, second and third signal level of presetting;

Adjust Writing power and add up to adjust number of times according to above-mentioned comparative result;

Adjust write latency and add up to adjust number of times according to the dynamic time deviate of an input;

According to the adjustment number of times of the adjustment number of times of this Writing power and this write latency adjust present etch-recording speed and a time delay table with the rotating speed of control spindle drive motor and the write operation of read/write head.

3. method as claimed in claim 2, wherein, this adjust present etch-recording speed and a time delay table with the write operation step of the rotating speed of control spindle drive motor and read/write head comprise keep present etch-recording speed and time delay table.

4. method as claimed in claim 2, wherein, this is adjusted present etch-recording speed and time delay table and comprises with the write operation step of the rotating speed of control spindle drive motor and read/write head and increase etch-recording speed and upgrade this of table time delay.

5. method as claimed in claim 2, wherein, this is adjusted present etch-recording speed and time delay table and comprises with the write operation step of the rotating speed of control spindle drive motor and read/write head and reduce etch-recording speed and upgrade this of table and recording power time delay.

6. method as claimed in claim 5 wherein, uses a lasing light emitter that this recording power is provided.

7. method as claimed in claim 2 further comprises when if the adjustment number of times of the adjustment number of times of this Writing power and this write latency is all zero, then adjusts the step that write error and accumulative total are adjusted number of times.

8. method as claimed in claim 6 comprises that further adjusting number of times according to this accumulative total adjusts present etch-recording speed and time delay table.

9. method as claimed in claim 8, wherein, this adjust present etch-recording speed and show time delay step comprise keep present etch-recording speed and time delay table.

10. method as claimed in claim 8, wherein, this is adjusted present etch-recording speed and shows step time delay and comprises and increase etch-recording speed and upgrade this of table time delay.

11. method as claimed in claim 2, wherein, but this dynamic time deviate changes with dyestuff kind and the coating thickness that read/write head temperature and imprinting disc use.

12. method as claimed in claim 2, wherein, first, second and third signal level of this input comes from the formulation sampling spot of the radiofrequency signal of this reflection when using read/write head laser radiation imprinting disc.

13. method as claimed in claim 2, wherein, this radiofrequency signal is a feedback signal.

14. method as claimed in claim 12, wherein, this formulation sampling spot is defined in the orange paper.

15. method as claimed in claim 12, wherein, but the radiofrequency signal waveform of this reflection changes with the dyestuff crystallization degree of depth of an imprinting disc.

16. a device that improves the etch-recordable optical disk etch-recorded excellence rate comprises:

One level comparator is compared with first, second and third default signal level in order to first, second and third signal level that will import respectively, and is exported each comparative result;

One limiter is converted to binary signal to take out the radiofrequency signal waveform of this reflection in order to the radiofrequency signal with reflection;

One phase comparator, in order to the radiofrequency signal waveform of binary reflection with compare with the marking signal waveform of 8/14 modulation method and produce the phase error output signal;

One low-pass filter is in order to utilize this phase error output signal to remove the low frequency datum line fluctuation in the radiofrequency signal that is included in this reflection and to produce a dynamic time deviate; And

One acceptance rate control microprocessor is in order to respectively to export the rotating speed that result, this dynamic time deviate and a cyclic redundancy check error-detecging code are adjusted read/write head output power, imprinting table time delay and spindle drive motor according to this level comparator.

17. device as claimed in claim 16, wherein, this dynamic time deviate changes with dyestuff kind and the coating thickness that a read/write head temperature and a disc use.

18. device as claimed in claim 16, wherein, but first, second and third signal level of this input comes from the formulation sampling spot of the radiofrequency signal of this reflection when using read/write head laser radiation imprinting disc.

19. device as claimed in claim 18, wherein, this formulation sampling spot is defined in the orange paper.

20. device as claimed in claim 16, wherein, this radiofrequency signal is a feedback signal.

21. device as claimed in claim 16, wherein, but the radiofrequency signal waveform of this reflection changes with the dyestuff crystallization degree of depth of an imprinting disc.