TW200805322A - A method and apparatus of optimizing write parameters for a rewritable optical disc - Google Patents

Abstract

A method of optimizing write parameters for a rewritable optical disc comprises the steps of: reading out (310) predefined write parameters from the rewritable optical disc, which predefined write parameters comprise a power indicator Pwind and an initial Epsilon value e, selecting (320) a Tmp from a range [8T/40, 14T/40] and a dTtop from a range [11T/40, 17T/40], where Tmp is a multiple pulse time, dTtop is a first pulse lead-time, and T is a clock period, adjusting (330) ε to adapt to a jitter value according to the value of Pwind, and generating (340) an optimized write power Pw based on the jitter value and the adjusted ε.

Description

200805322 IX. INSTRUCTIONS: TECHNICAL FIELD OF THE INVENTION The present invention relates to a method and apparatus for optimizing write parameters of a rewritable optical disc. [Prior Art] It has rewritable characteristics and can be widely used for overwriting optical discs. Therefore, the number of writes of a one-degree copy disc is a very important quality indicator. The number of writers that can overwrite the first disc depends not only on the stack design (staek ▲ (4) and on the way it is written. However, it can overwrite the disc package DV ^ ^ standard format (type), such as CD_RW ( Can overwrite compressed disc), DVD-RW (can overwrite digital multi-function, - Zi Xi Li this disc), BKRW (can overwrite Blu-ray disc mother can overwrite optical disc standard format exposed from - laser "... And the same as in the storm. And: when the first beam-糸 column write pulse, its behavior is not RW, can include $ π γ ^ /, 軚 礼 礼, such as many brands made by DVD-5. And each - can be overwritten, the brand can have different materials to rewrite the first φ / , and when exposed to a human pulse from a + 纟 bundle, the performance of the gastric injection first write parameters to adapt to different 裘. , optimized, in order to improve _ < , / / is the standard format of the disc / brand is important ^ can be set to write the disc D 〇 arm (direct 、, / (write times). (direct copy) cycle ability The method of writing the parameters 夕宫,目, 14 + 大夕数 includes the steps: (1) in ^ to the test, The write parameters for each type () in the consistent test and other write write power overwrite discs are saved in the ":: choose the mother-type/brand developable drive; or at 112802.doc 200805322 During the mass production period, the type of g > and the mother of the type can be overwritten by the writing of the disc to overwrite the area of the disc - (7) the driver can be retrieved from the drive that can be overwritten by light. (4) Optimize a write power based on the overwritten write-write parameters that can be overwritten by the disc.

In practice, the method of the above is not sufficient (four) suitable write parameters to effectively improve - the ability to overwrite the D〇w cycle of the disc. Moreover, the saved write reduction may be difficult to adapt to the new type/brand rewritable optical disc for the developed driver, so it is not easy to improve the coverage that is unknown to the developed r drive. Write the D〇w loop capability of the disc. SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for optimizing the write parameters of an rewritable optical disk to improve the cycle capability of the rewritable optical disk. The method for overwriting the write parameters of the optical disc includes the steps of: reading the predetermined write parameter, wherein the predetermined write parameter includes an indication power and an initial value. , from the range [8T/40 ' 14T/40] select a Tmp and from the range [predicted 40, 40] & select - dTt 〇 p, where Tmp is - multi-pulse time, dTt 〇 p is a first pulse lead time And τ is a clock cycle, S is adjusted according to PWind to adapt to a jitter value, and based on the jitter value and the adjusted ε, the optimized write power is generated.

Pw 〇 The invention also proposes a device comprising a processing unit for performing the different steps of the method according to the invention. The optimization of the write parameters is based on the selection of 112802.doc 200805322 P and dTtop from the range [8T/40, HT/40] and [11T/4〇, 17T/4〇] respectively. Can effectively improve the ability of rewritable discs. [Embodiment] Hereinafter, technical measures will be described in detail by referring to the embodiments of the accompanying drawings. Figure 1 is a diagram illustrating the write parameters for writing a mark on a writable optical disc with a write strategy of 1T and a write speed of 2·4, where the clock period. π

Pw is the - write power, which is the bias power of the laser diode. Second: erase power. Pe is less than Pw and larger than Pb, and is used to erase the data on the rewritable optical disc.

Tt〇P is the first-pulse time, and dTt〇p is a first pulse-lead time.

Tmp is #pulse time, and D (10) is - erase boot time. The factors that the J ring can overwrite the D0W cycle capability of the disc include many written tea numbers, such as PW, Pe, e values, and timing parameters (eg, Tmp, Tt〇p, dTtop, Tera, etc.). Its towel, ε is equal to pe/pw. In addition, the use-jitter value reflects the quality of the write-writable disc. If you shake, "J"] can write over the quality of the disc. According to the standard format of different rewritable discs, it is pre-determined that the acceptable rewritable disc can correspond to the maximum jitter value. When overwriting an rewritable disc, the jitter value cannot be greater than the maximum jitter value. How does the number of 疋 &> numbers affect the D 〇 w cycle of a rewritable CD? Figure 2, the result is by the write speed a #,, 112802.doc 200805322

Tera 2 7T/40, dTtop = 0 and Pw=430 are written to a rewritable disc (4x DVD RW): (1) When Tmp is equal to 20T/40, the relationship between the jitter value and the number of DOW corresponds. For the first curve with a square π shape point. If the jitter limit is set to 10%, the number of DOW is about 170 as shown by the dotted line in Fig. 2. (2) When Tmp is equal to 17T/40, jitter The relationship between the value and the number of DOWs corresponds to a second curve having a ''triangle' shape point. If the jitter limit is set to 10%, the number of DOWs is approximately 190 as indicated by the dotted line in FIG. (3) When Tmp is equal to 14T740, the relationship between the jitter value and the number of DOW corresponds to the third curve having the shape point of the n double cross line 11. If the jitter limit is set to 10%, the number of DOWs is approximately 3, 80 times as indicated by the dotted line in Figure 2. (4) When Tmp is equal to 11T/40, the relationship between the jitter value and the number of DOW corresponds to the fourth curve with the shape of the "three cross lines". If the jitter limit is set to 10%, as shown in Figure 2 The dotted line shows that the number of DOW is about 420. Therefore, Figure 2 shows that the timing parameter significantly affects the DOW cycle ability (DOW times). One of the present inventions is based on how the timing parameter affects the ability to overwrite the DOW cycle capability of the optical disk. The embodiment selects a pair of specific Tmp and dTtop to optimize the write parameters in order to improve the DOW cycle capability of the rewritable disc. The specific range of Tmp is [8T/40, 14T/40], and the specific range of dTtop is [11T/40, 17T/40] Figure 3 is a flow chart illustrating the method of the present invention by an embodiment. The method of overwriting the parameters of the optical disk by the H2802.doc 200805322 includes the steps of: The rewritable optical disc reads (3 1 〇) predetermined write parameters, wherein the predetermined write parameter includes - indicating power ρ Λ ¥ _ and _ initial I value. The rewritable optical disc may include other predetermined writes Input parameters, such as a write speed. According to the overwriteable disc The standard format is pre-determined for writing on rewritable discs. ...Numbers from range [8T/40, 14T/4〇] selection (32〇) A Dinghe and from the range [11Τ/40 '17Τ/40] (320) - dTt 〇 p, where Tmp is - multi-pulse time, dTtop is a first pulse lead time, and is a clock cycle. For example, the selected combination of Tmp and dTtop can be: Tmp =: 8T / 4 〇 and dTt〇P=17T/40; TmP=llT/40 and dTtop=13T/4〇,k or

TmP = 14T / 4 〇 and dTt0 (four) 3T / 4 〇. The selection (32〇) step also selects one (10) and -Tt〇p depending on the selected TmP and dTtop. For an erase boot time, Ttop is a first pulse time. Ding can be equal to 〇 and can be equal to Tmp. Tmp, dTt〇p, and TeraATt〇p affect the jitter value. Adjust (330) ε according to Pwind to adapt to the jitter value. The jitter value corresponds to a good write quality, and is advantageous for improving the d〇w cycle capability of the rewritable optical disc. The jitter value of the I & should be as small as possible and at least less than a predetermined format according to the standard format of the rewritable optical disc. The maximum jitter value. The adjustment (33()) step can be implemented by a first order polynomial or a parabolic formula. Based on the jitter value and the adjusted ε, an (34)-optimized write force rate Pw is generated, and the erasing power Pe can be calculated according to the equation ε = 卜. Based on the adjusted ε and the jitter value, it can be generated by a parabolic formula. The generation (0) can also check whether the margin of the optimized pw is not less than the standard format specification of the drive that can overwrite the 112802.doc -10- 200805322 disc or the pre-existing standard format specification. Pre-determined margins.士———————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————— The value is returned to the selection (320) step. The advantages of embodiments of the method can be made significant. Figure 4 shows the DOW cycle capability of the method of the embodiment of the present invention by a conventional method. This method of the palladium method and the traditional method of this month are written by a corresponding 2·4χ

RW) to achieve: After the first disc (4X DVD (1) based on the traditional method: Tmp = 2 〇 T / 4 (), TtQp = 2QT / 4Q, such as = 〇, state (four) 3 ·, PW = (four), (four) · 56. The relationship between the jitter value and the clarification number corresponds to the first curve having the "three intersections and lines, the shape points. In this case, if the jitter limit is set to 1 as shown in FIG. % 'The cycle capacity is less than 400. (7) The method according to the embodiment of the present invention: Tmp=8T/4〇, Tt〇P=8T/40, Tera=0, dTt〇p=17T/40, Pw=43〇, (4) 4. The relationship between the jitter value and the D0W number corresponds to the second curve having the "diamond" shape point. In this case, 'If the jitter limit is set to 10% as shown in FIG. 4', the cycle capability Nearly 1000. / Figure 5 depicts - an apparatus for performing the method of the above embodiment. This embodiment is for a rewritable disc (e.g., 4x DVD RW) with a write speed of 4x or less. 4 Optimized - A device for overwriting a writer parameter of a disc. Included: 112802.doc -11 - 200805322 - a read unit (5 1 0) for reading a predetermined write parameter from the rewritable optical disc, wherein The determined write parameters include an indicated power = indp value. The predetermined write parameters are written on the rewritable optical disc according to the standard format of the rewritable optical disc. One-selection unit (520)' is used for the self-range [ 8τ/4〇, ΐ4τ/4〇] select one, and select _dT ton from the range [11174〇, 17Τ/4()], 苴中叫j is a multi-pulse time, dTtop is a first-pulse lead time, And the D is a clock cycle. The selection unit (10) is also used according to the selected Tmp and:: 7 coffee and a Tt 〇 P. D (10) is - erase boot time, Ttop Feng a first pulse time. The unit (53〇) is used to adjust the ε to adapt to the jitter ^ ^ ^ ° 冩 inlet mouth, and is beneficial to improve the DOW cycle ability of 1 = 1. The suitable jitter value should be as small as possible, the value of the movement. The adjustment unit ο can adjust the ε by a predetermined maximum jitter. The precision is generated by a first-order polynomial or a parabolic formula—the last 〇 54〇) 'is used to generate the 彳-based writing based on the jitter value and the adjusted ε Input power PW. Is the margin of Pw that produces a single-opening optimization χ, 7^54〇) can also be used to check the fan bite Phase ^ is less than the predetermined value in the standard format specification of the standard format of the rewritable disc. The maximum value of the round is not less than the predetermined margin. Limit, (4) dry, _t. <PW's margin is less than a predetermined amount. J knows not to choose early weight. The device can be beneficial to people's choice of Tmp and dTop. Wang " to CD recorder order ( For example, computer disc 112802.doc 12-200805322, stand-alone equipment, etc. It should be noted that the above-described embodiments are illustrative and not limiting, and in the case of deviation from the scope of the appended claims, An alternative embodiment is available. In the application for a patent garden, any tea test mark placed in the enclosed wave should not be construed as a limitation on the scope of the patent application. The wording, including, does not exclude the existence of a patent application or step. The wording "one" of the two elements of 70 elements does not exclude the existence of multiple such elements. The invention can be implemented by means of a computer comprising a plurality of different and suitably programmed. In listing a number of devices: In the early claims, some of these devices can be embodied. The use of the first, the first and the first and the first and the second and the second is not in any order. These terms should be interpreted as names. ' [Simple description of the drawing] The optimization method according to the present invention will be described by way of an example of the implementation of the P-left..., and the Ik pattern. The method and device for writing parameters of the disc and the other aspects thereof become clear, wherein: (4) and other aspects will be illustrated in FIG. 1 as a schematic diagram of a rewritable optical monument; Figure 2 of the write-mark write parameter shows how the timing parameter affects a force; setting the Dow cycle energy of the write optical disc. Figure 3 is an illustration of the method of the present invention by an embodiment. Figure 4 is compared with a conventional method. Wang Hui's improved DOW cycle capability of the method; I does not implement the embodiment 112802.doc 200805322. FIG. 5 depicts an apparatus for performing the method of the above embodiment. Throughout the drawings, the same reference numerals are used to refer to the like parts. [Description of main component symbols] 510 510 Reading unit 520 Selection unit 530 Adjustment unit 540 Generation unit 500 Equipment 112802.doc 14-

Claims (1)

200805322 X. Patent application scope: 1 . A method for optimizing write parameters of a rewritable optical disc, comprising the steps of: reading (3 10) predetermined write parameters from the rewritable optical disc, wherein the predetermined The write parameters include an indication power pWind and an initial & value, ° mesh circumference [8Τ/40, 14Τ/40] selection (320) - Tmp and from range [11T/4〇' 17TM0] selection (320) a dTt0P, where the Tmp is more than one Pulse time, the dTtop is a first pulse lead time, the τ is a clock period, t adjusts (ε) according to the Pwind to adapt to a jitter value, and generates based on the jitter value and the adjusted ε. (34〇) an optimized write power Pw. 2. If the method of the requester, the selection (10) step, also selects a Tera and a Tt according to the selected Tmp and dTop, and the #, p, and the Tera are an erasure order, the Ttop is one. The first pulse time. 3. The method of claim 2, wherein the Tera is equal to Tmp. The Ttop is equal to the method θ of the entry 2, and the step of generating (10) in # also includes checking whether the margin of i is not less than the standard format specification of the rewritable disc*2:: or the corresponding driver. The predetermined _ surplus g product limit value is outputted if the remaining margin of the 2Pw is exceeded. Hai pre-confirmed / 5 · If the method of item 1 is concerned, 苴 φ optimizes the margin of Pw: in the 'step also includes checking whether it is written in the 疋 不 no less than the standard stroke I12802 in the rewritable disc. Doc 200805322 The specification or the corresponding standard format specification of the driver pre-discloses one of the thresholds. If the margin of the optimized Pw is less than the predetermined margin threshold, return to the selection ( 32〇) Steps. 6. The method of #1, wherein the combination of Tmp and dTt叩 is TmP = 8T740 and dTt〇p=17T/4〇, Tm ιιιτ/4〇 and dTtop 2Τ13Τ/40, or Tmp=14T/4 (^dTt〇p=13T/4〇. 7. A device that optimizes the write parameters of the optical disc, the device includes: a reading unit (510) for reading a predetermined write parameter from the rewritable optical disc, wherein the predetermined writer parameter comprises an indicated power Pwind and an initial ε value, a selection unit (52) 〇) 'It is used to select a Tmp from the range [8Τ/40, 14Τ/40] and select a dTt叩 from the range [11T/4〇, 17Τ/4〇], where the Tmp is the day pulse day guard, dTt〇p is a first pulse lead time, and the T is a clock period, and the interval is positive (53〇), which is used to adjust the ε according to the Pwind to adapt to a jitter value, and “a generating unit (540) The method for generating an optimized write power pw based on the jitter value and the adjusted ε. 8. The device of claim 7 wherein the selection unit (10) is also used according to the selected Tmp and dTop selects - (10) and - Ttcp, wherein the Te_t is divided by the boot time and the Tt〇p is a first-pulse time. 9. The margin of the Pw optimized as the device of claim 7 wherein the generating unit (540) is also used to check if the value is not less than the standard of the rewritable disc 112802.doc 200805322 Wide specification or phase & balance threshold Γ if: ": The standard specification format determine in advance the right ... 5 of Hai taken good 2PW hafnium, the balance of scholars threshold, then the wheel out Pw. , "Hai predetermined 10. If the request for the optimization of the item 7 of the remaining: ~, the production unit (also used to check the specification or the corresponding: two? margin threshold In the 4th specification, one of the margins is pre-arranged, and the margin of Γ ^ is less than the predetermined dTtQp. The day does not select the unit (520) to reselect Tmp and 11 one for the frost Caution..Λ Write a recorder for writing data on a disc, which includes a device as in claim 7. 112802.doc