CN101409081B - Recording power decision method and device - Google Patents
Recording power decision method and device Download PDFInfo
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- CN101409081B CN101409081B CN2008101781239A CN200810178123A CN101409081B CN 101409081 B CN101409081 B CN 101409081B CN 2008101781239 A CN2008101781239 A CN 2008101781239A CN 200810178123 A CN200810178123 A CN 200810178123A CN 101409081 B CN101409081 B CN 101409081B
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Abstract
A recording power determination method for determining a recording power of an optical beam for recording data on an information storage medium includes the steps of recording test data on the information storage medium at a plurality of test recording powers; reading the test data recorded at each test recording power, generating a signal, and measuring a modulation factor of the signal corresponding to each test recording power; calculating a product of an n'th power of each test recording power and the corresponding modulation factor, thereby obtaining a plurality of products corresponding to the plurality of test recording powers, where n is a value of exponent and is a real number other than 1; calculating a first recording power based on the correlation between the plurality of test recording powers and the plurality of products; and calculating the recording power based on the first recording power.
Description
Technical field
The present invention, relate to a kind of recording power when determining in information recording carrier record data, recording power decision method and recording power determination device.
Background technology
As being used for the information recording carrier of record data, known have a CD.Optical disc apparatus, illumination beam on the CD comes record data, and recorded data in the CD is regenerated.Even under CD or the same situation about making of optical disc apparatus, owing to have individual difference in CD or the optical disc apparatus, therefore the problem that exists is, sometimes this individual difference, can cause can't be in CD suitable record data, the suitable data of regenerative recording in CD in addition.
As a known method that is used for preventing this problem, be when loading optical disk, to each CD and the suitable recording power of optical disc apparatus decision.
Figure 16 is the synoptic diagram of the general CD 601 of expression.As shown in figure 16, CD 601 middle orbits 602 form spiral fashion.Light beam by to track 602 irradiation modulation overwriting power forms a plurality of marks and a plurality of blank, by carrying out the record of data like this in track 602.In the CD 601, employed recording power decision zone during the recording power of employed user data area and decision light beam when being provided with the user record data.Recording power decision zone is arranged in the zone beyond the user data area medial region or the outermost zone of CD 601 (particularly, for).
Figure 17 is the synoptic diagram of expression optical disc apparatus 700 in the past.Optical disc apparatus 700 has: shaven head 702, reproducing unit 704, demodulation ECC (Error Correcting Code) circuit 706, recording power determination section 708, determining recording power portion 710, drive circuit for laser 712 and record data generating unit 714.
After CD 601 was loaded onto in the optical disc apparatus 700, the type of CD 601 was identified, and rotary CD 601.Shaven head 702 has semiconductor laser (not shown), when CD 601 rotations, uses from the light beam of the semiconductor laser outgoing of shaven head 702 irradiation CD 601.
During record data, shaven head 702 usefulness have the light beam irradiates CD 601 of given recording power, form mark in CD 601 in CD 601.Here, by the marker edge recording mode, the data of Run Length Limited (1,7) modulation system are carried out record.In this case, in the CD 601, the shortest 2T to each reference period T of the longest 8T, is formed 7 kinds of marks and blank.
In addition, from CD 601 sense datas the time, shaven head 702 is by the light beam irradiates CD 601 of the little regenerating power of power ratio recording power, and reception is by the light of CD 601 reflections.Shaven head 702 generates the signal of recorded data in the expression CD 601 by received light is carried out light-to-current inversion.Reproducing unit 704 is measured the degree of modulation by shaven head 702 signals that generated, and what simultaneously shaven head 702 is generated is signal digitalized.About degree of modulation, will describe with reference to Figure 19 in the back.
Figure 18 is the synoptic diagram of the reproducing unit 704 in the expression optical disc apparatus 700 in the past.As shown in figure 18, reproducing unit 704 has prime amplifier 801, sampling hold circuit 802, AD transducer 803, arithmetical unit 804 and binaryzation data generating unit 805.
Binaryzation data generating unit 805, with shaven head 702 generated signal digitalized after, generate digitizing data (binaryzation data), with the signal 705 of expression binaryzation data, export to demodulation ECC circuit 706 and recording power determination section 708.
Figure 19 is for representing the synoptic diagram of the signal waveform that prime amplifier 801 is exported.As shown in figure 19, though if the signal level when establishing the light beam of the semiconductor laser irradiation regenerating power of signal level when shaven head 702 semiconductor laser extinguishes or shaven head 702 and but not being subjected to influencing of light that CD 601 reflected, till the signal level of the signal corresponding with mark is amplitude A, signal level when the semiconductor laser from bare headed 702 extinguishes, to with the signal level of blank corresponding signal till is amplitude B, then degree of modulation is by (A-B)/A represents.
Referring again to Figure 17, in the past recording power decision method is described.
In the CD 601, record employed constant parameter when the decision recording power.Shaven head 702 generates the signal 703 of the constant parameter that expression reads from CD 601 (below, be called set-point), and signal 703 is exported to reproducing unit 704.The binaryzation data generating unit 805 of reproducing unit 704, generation will be represented the signal 705 after signal 703 binaryzations of specified value, and signal 705 is exported to recording power determination section 708.
Determining recording power portion 710, the test record power of setting light beam in drive circuit for laser 712.Determining recording power portion 710 sets 8 different test record power A～H.Here, test record power A is maximum test record power, and according to the order of test record power B～H, test record power diminishes gradually.
Record data generating unit 714 generates test data, and the signal 715 of the test data that expression is generated is exported to drive circuit for laser 712.Drive circuit for laser 712 driving shaven heads 702 make shaven head 702 in the recording powers decision zone of CD 601, from about 1 all record test datas of the given continuous track in position.Record data generating unit 714 generates test data, makes to form 8T mark and 8T blank continuously with shaven head 702 in CD 601.In the CD 601, on about 1 week of CD 601, duplicate record test record power A～H.Among Figure 20, in CD 601, represent corresponding zone with test record power A～H by A～H.
After the end of record (EOR) of test data, shaven head 702 is given CD 601 with the light beam irradiates of regenerating power, by like this, and the test data of playback record in track, and generate the signal of expression test data.The amplitude of shaven head 702 signals that generated according to whether being formed with mark on the CD 601 changes.Shaven head 702 signals that generated 703 are transfused to reproducing unit 704.
Referring again to Figure 18.In reproducing unit shown in Figure 180 704, prime amplifier 801 amplifying signals 703.Sampling hold circuit 802 keeps the peak value and the valley of the signal that amplified by prime amplifier 801.A/D transformation component 803, the peak value and the valley digitizing of the signal that sampling hold circuit 802 is kept.Arithmetical unit 804 computing digitizings peak value and valley, obtain the degree of modulation of signal.Because the amplitude of signal 703 is different because of test record power A～H, so degree of modulation is different because of test record power A～H.Arithmetical unit 804, the signal 707 of the degree of modulation of signal is represented in generation, and signal 707 is exported to recording power determination section 708.
Recording power determination section 708, according to the degree of modulation corresponding to test record power A～H, any method by in two recording power decision methods in the past shown below decides recording power.
Figure 21 is the figure of explanation the 1st recording power decision method in the past, is the curve map of the relation between expression test record power and the degree of modulation.In the 1st recording power decision method in the past, recording power determination section 708, according to the correlationship between the degree of modulation of a plurality of test record power and corresponding a plurality of test record power, selecting degree of modulation is the recording power P0 of M0.Recording power determination section 708, it is long-pending with the set-point of reading from CD 601 to calculate recording power P0, the recording power when deciding record data.Recording power determination section 708 with the signal 709 of the recording power that calculated of expression, is exported to determining recording power portion 710.
Figure 22 is the figure of explanation the 2nd recording power decision method in the past, is the curve map of the relation between expression test record power and (degree of modulation and test record power are long-pending).In the 2nd recording power decision method in the past, recording power determination section 708, the degree of modulation and a plurality of test record power that calculate corresponding a plurality of test record power respectively are long-pending, generate the near linear of expression test record power and the correlationship of (degree of modulation and test record power are to be amassed), near linear, calculate product and be 0 recording power Pthr.Next, recording power determination section 708, it is long-pending with the set-point of reading from CD 601 to calculate recording power Pthr, the recording power when deciding record data.Recording power determination section 708, the signal 709 of the value that expression is calculated is exported to determining recording power portion 710.
But the 1st recording power decision method in the past and the 2nd recording power decision method in the past all can't determine suitable recording power.
Recording power determination section 708 according in the past the 1st recording power decision method decision recording power the time, for example if produced relative tilt between the CD 601 and bare headed 702, just can't determine suitable recording power.Below, contrast Figure 23 describes the recording power under the situation that has produced inclination.
Figure 23 is the curve map of the relation between expression recording power and the degree of modulation.In the curve map of Figure 23, all there is not result under the situation of run-off the straight with when record and when reading recorded data by solid line 1101 expressions, record the time has been produced to tilt and do not produce result under the situation of inclination when reading by solid line 1102 expressions, during with record and when reading the result that all produced under the situation about tilting represent by solid line 1103.Produced the degree of modulation under the situation about tilting, littler than the degree of modulation that does not produce under the situation about tilting.Do not produce when reading and tilt and produced during record under the situation about tilting, in 8 recording powers, the degree of modulation of the recording power H that recording power is minimum can't be measured.Equally, under when record and when reading had all produced situation about tilting, the degree of modulation of recording power H also can't be measured.
Reading of the record of test data and test data carried out before user data, read the test data that is write down after record test data immediately.Therefore,, and read test data, then can obtain among Figure 23 by the result shown in the solid line 1103 if producing record test data under the state of relative tilt.According in the past the 1st recording power decision method, under the situation of decision recording power, recording power determination section 708 is selected the recording power P1103 of corresponding modulating degree M0.Consequently, the influence of the inclination when writing down, the influence of the inclination of when reading (below, be called test data) when also being subjected to reading test data except test data.
Yet, though when test data writes down, produced under the situation of inclination, also produced inclination when thinking user data, not necessarily can produce inclination when reading this user data.User data can not read after record for several at once, in most cases, user data, quilt is at other optical disc apparatus or read in the optical disc apparatus that CD is loaded once more, does not produce inclination when reading user data.Therefore, during recording power, can not consider the influence of the inclination when test data is read in decision, and the influence of the inclination when only considering the test data record.So the recording power that should select when producing relative tilt is not recording power P1103, but the recording power P1102 shown in Figure 23.Under situation according in the past the 1st recording power decision method decision recording power, recording power determination section 708, owing to selected recording power P1103 greater than recording power P1102, therefore shaven head 702 is with unnecessary big recording power record data.So, in the 1st recording power decision method in the past, repeat record and can make the very fast deterioration of CD 601.
In addition, under the situation of recording power determination section 708 according in the past the 2nd recording power decision method decision recording power, as shown in figure 24, if select 84 test record power that the test record power in the test record power is bigger, and to these 4 test record power, generate the near linear of expression test record power and the correlationship of (degree of modulation and test record power are to be amassed), then product is 0 recording power near linear, is recording power Pthr1.In addition, if select 8 lower-powered 4 test record power of the test record in the test record power, and to these 4 test record power, generate the near linear of the correlationship of expression test record power and (degree of modulation and test record power are long-pending), then product is 0 recording power near linear, is recording power Pthr2.
Can learn that from Figure 24 because of test record power, product is that 0 recording power is greatly different in the near linear.Also be, under situation according in the past the 2nd recording power decision method decision recording power, according to which measured power record test data and use the result of which test record power to determine recording power, the recording power that is determined is also greatly different.Therefore, under the situation according in the past the 2nd recording power decision method, recording power determination section 708 can't the suitable recording power of unique decision.In addition, under recording power determination section 708 had determined situation greater than the recording power of suitable recording power, CD will soon worsen, in addition, under recording power determination section 708 has determined situation less than the recording power of suitable recording power, can't be in CD record data suitably.
Summary of the invention
The present invention proposes in view of above problem just, and its purpose is: a kind of recording power decision method and recording power determination device that determines suitable recording power is provided.
Recording power decision method of the present invention, the recording power of decision light beam during record data toward information recording carrier in comprises: the operation of distinguishing record test data with a plurality of test record power in above-mentioned information recording carrier; The test data of reading respectively with each test record power trace generates signal, and measures the operation of the degree of modulation of the pairing above-mentioned signal of each test record power respectively; By to each test record power, n (power exponent n is the real number beyond the 1) power that calculates each test record power respectively amasss with corresponding degree of modulation is, obtains the operation of a plurality of products of the above-mentioned a plurality of test record power of correspondence; According to the correlationship between above-mentioned a plurality of test record power and the above-mentioned a plurality of product, calculate the operation of the 1st recording power; And, according to above-mentioned the 1st recording power, calculate the operation of above-mentioned recording power.
In certain embodiment, the operation of aforementioned calculation the 1st recording power, comprise: generate the near linear of the correlationship between the above-mentioned a plurality of test record power of expression and the above-mentioned a plurality of product, and calculating above-mentioned product in above-mentioned near linear is the operation of 0 above-mentioned the 1st recording power.
In certain embodiment, in the operation of a plurality of products of above-mentioned acquisition, the value of above-mentioned power exponent n is 2.
In certain embodiment, above-mentioned recording power decision method, also comprise: the operation of the value of playback record in above-mentioned information recording carrier, in the above-mentioned information recording carrier, record the value of Pind, the value of ρ, and the value of κ, above-mentioned operation of reading, comprise: the value of reading above-mentioned Pind, the value of above-mentioned ρ, and the operation of the value of above-mentioned κ, the above-mentioned operation that writes down, comprise: 0.9 times to 1.1 times the operation that the scope of above-mentioned a plurality of test record power is made as the value of above-mentioned Pind, the operation of aforementioned calculation the 1st recording power, comprise: the near linear that generates the correlationship between the above-mentioned a plurality of test record power of expression and the above-mentioned a plurality of product, and calculate the operation that in above-mentioned near linear above-mentioned product is 0 above-mentioned the 1st recording power, the operation of aforementioned calculation recording power comprises: the operation of calculating the product of above-mentioned the 1st recording power and (-1/ (value of κ)+2) and (value of ρ).
In certain embodiment, above-mentioned recording power decision method, also comprise: the operation of the value of playback record in above-mentioned information recording carrier, in the above-mentioned information recording carrier, record the value of above-mentioned power exponent n, the operation of the value of playback record in above-mentioned information recording carrier comprises: the operation of reading the value of above-mentioned power exponent n, the operation of a plurality of products of above-mentioned acquisition comprises: the operation of using the value of the above-mentioned power exponent n that reads.
In certain embodiment, the operation of above-mentioned record test data comprises: so that the above-mentioned signal that is generated in the operation of said determination degree of modulation comprises the mode of the signal in a plurality of single cycles, write down the operation of above-mentioned test data.
In certain embodiment, in the above-mentioned information recording carrier, by the light beam of modulating, form a plurality of marks and a plurality of blank, the operation of above-mentioned record test data, comprise: so that the amplitude of the above-mentioned signal that is generated in the operation of said determination degree of modulation, with above-mentioned information recording carrier in the roughly the same mode of amplitude of the longest mark in the formed mark, form the operation of a plurality of marks.
In certain embodiment, in the above-mentioned information recording carrier, a plurality of orbit-shapeds become concentric circles or spiral fashion.
In certain embodiment, the operation of a plurality of products of above-mentioned acquisition, comprise: above-mentioned power exponent n is a plurality of values, to each of above-mentioned a plurality of values, obtain the operation of a plurality of products of corresponding above-mentioned a plurality of test record power respectively, above-mentioned recording power decision method, also comprise: by to each of a plurality of values, calculate the rectilinearity of the correlationship between above-mentioned a plurality of test record power and the above-mentioned a plurality of product respectively, calculate a plurality of rectilinearity of corresponding above-mentioned a plurality of values, and determine the operation of the value that above-mentioned a plurality of value cathetus is the highest, the operation of aforementioned calculation the 1st recording power, comprise: use a plurality of products of the corresponding above-mentioned a plurality of test record power relevant, calculate the operation of above-mentioned the 1st recording power with the highest value of above-mentioned a plurality of value cathetuss.
In certain embodiment, above-mentioned a plurality of values comprise the 1st value and the 2nd value, and above-mentioned the 1st value is 2, and above-mentioned the 2nd value is 3.
In certain embodiment, above-mentioned recording power decision method, also comprise: the operation of the value of playback record in above-mentioned information recording carrier, in the above-mentioned information recording carrier, record the value of Pind, the value of ρ, and the value of κ, above-mentioned operation of reading, comprise: the value of reading above-mentioned Pind, the value of above-mentioned ρ, and the operation of the value of above-mentioned κ, the above-mentioned operation that writes down, comprise: 0.9 times to 1.1 times the operation that the scope of above-mentioned a plurality of test record power is made as the value of above-mentioned Pind, the operation of aforementioned calculation the 1st recording power, comprise: generate the near linear of the correlationship between the above-mentioned a plurality of test record power of expression and the above-mentioned a plurality of product, and calculating above-mentioned product in above-mentioned near linear is the operation of 0 above-mentioned the 1st recording power.
In certain embodiment, the operation of aforementioned calculation recording power, comprise: the rectilinearity that in the value of above-mentioned power exponent n is at 2 o'clock is under the high situation of 3 o'clock rectilinearity than the value of above-mentioned power exponent n, calculates the product of above-mentioned the 1st recording power and (-1/ (value of κ)+2) and (value of ρ); And, the rectilinearity that in the value of above-mentioned power exponent n is at 3 o'clock is under the high situation of 2 o'clock rectilinearity than the value of above-mentioned power exponent n, calculates the operation of above-mentioned the 1st recording power and the product of (3 * (value of κ)-2)/(2 * (value of κ)-1) and (value of ρ).
In certain embodiment, above-mentioned a plurality of value comprises the 1st value and the 2nd value, determine the operation of the value that above-mentioned a plurality of value cathetus is the highest, comprise: to above-mentioned the 1st value, select at least two test record power in above-mentioned a plurality of test record power, set the 1st test record power group's who constitutes by above-mentioned selected at least two test record power operation; According to all test record power of above-mentioned the 1st test record power group, and according to above-mentioned the 1st test record power group's the corresponding product of all test record power, generate the 1st straight line, and calculate the operation of the 1st slope of above-mentioned the 1st straight line; To above-mentioned the 1st value, do not become identical mode with test record power with above-mentioned the 1st test record power group, select at least two test record power in above-mentioned a plurality of test record power, set the 2nd test record power group's who constitutes by above-mentioned selected at least two test record power operation; According to all test record power of above-mentioned the 2nd test record power group, and according to above-mentioned the 2nd test record power group's the corresponding product of all test record power, generate the 2nd straight line, and calculate the operation of the 2nd slope of above-mentioned the 2nd straight line; According to above-mentioned the 1st slope and above-mentioned the 2nd slope, obtain the operation of pairing the 1st ratio of above-mentioned the 1st value; To above-mentioned the 2nd value, select at least two test record power in above-mentioned a plurality of test record power, set the 3rd test record power group's who constitutes by above-mentioned selected at least two test record power operation; According to all test record power of above-mentioned the 3rd test record power group, and according to above-mentioned the 3rd test record power group's the corresponding product of all test record power, generate the 3rd straight line, and calculate the operation of the 3rd slope of above-mentioned the 3rd straight line; To above-mentioned the 2nd value, do not become identical mode with test record power with above-mentioned the 3rd test record power group, select at least two test record power in above-mentioned a plurality of test record power, set the 4th test record power group's who constitutes by above-mentioned selected at least two test record power operation; According to all test record power of above-mentioned the 4th test record power group, and according to above-mentioned the 4th test record power group's the corresponding product of all test record power, generate the 4th straight line, and calculate the operation of the 4th slope of above-mentioned the 4th straight line; According to above-mentioned the 3rd slope and above-mentioned the 4th slope, obtain the operation of pairing the 2nd ratio of above-mentioned the 2nd value; And, the more above-mentioned the 1st than with the operation of above-mentioned the 2nd ratio.
In certain embodiment, above-mentioned setting the 1st test record power group's operation, comprise: the operation of selecting two maximum in above-mentioned a plurality of test record power recording powers, above-mentioned setting the 2nd test record power group's operation, comprise: the operation of selecting two minimum in above-mentioned a plurality of test record power recording powers, above-mentioned setting the 3rd test record power group's operation, comprise: the operation of selecting two maximum in above-mentioned a plurality of test record power recording powers, above-mentioned setting the 4th test record power group's operation comprises: the operation of selecting two minimum in above-mentioned a plurality of test record power recording powers.
In certain embodiment, also comprise:, calculate the operation of the 1st all average average power of the above-mentioned a plurality of test record power of expression above-mentioned the 1st value; And, to above-mentioned the 2nd value, calculate the operation of the 2nd all average average power of the above-mentioned a plurality of test record power of expression, above-mentioned setting the 1st test record power group's operation, comprise: so that the mean value of test record power that belongs to above-mentioned the 1st test record power group is greater than the mode of above-mentioned the 1st average power, selection belongs to the operation of above-mentioned the 1st test record power group's test record power from above-mentioned a plurality of test record power, above-mentioned setting the 2nd test record power group's operation, comprise: so that the mean value of test record power that belongs to above-mentioned the 2nd test record power group is less than the mode of above-mentioned the 1st average power, selection belongs to the operation of above-mentioned the 2nd test record power group's test record power from above-mentioned a plurality of test record power, above-mentioned setting the 3rd test record power group's operation, comprise: so that the mean value of test record power that belongs to above-mentioned the 3rd test record power group is greater than the mode of above-mentioned the 2nd average power, selection belongs to the operation of above-mentioned the 3rd test record power group's test record power from above-mentioned a plurality of test record power, above-mentioned setting the 4th test record power group's operation, comprise: so that the mean value of test record power that belongs to above-mentioned the 4th test record power group less than the mode of above-mentioned the 2nd average power, selects to belong to the operation of above-mentioned the 4th test record power group's test record power from above-mentioned a plurality of test record power.
In certain embodiment, also comprise:, record the operation in the above-mentioned information recording carrier the highest value of above-mentioned rectilinearity in above-mentioned a plurality of values.
In certain embodiment, in the above-mentioned information recording carrier, also record the identifying information that is used for discerning above-mentioned information recording carrier, above-mentioned recording power decision method, also comprise: with above-mentioned identifying information and with the highest value of the pairing above-mentioned a plurality of value cathetuss of above-mentioned identifying information, be saved in the operation in the identifying information storage part.
In certain embodiment, above-mentioned recording power decision method, also comprise: the operation of the identifying information of playback record in above-mentioned information recording carrier, the operation of a plurality of products of above-mentioned acquisition, comprise: judge the above-mentioned identifying information of reading whether be stored in above-mentioned identifying information storage part in identifying information identical, under the identical situation of identifying information in being judged as the above-mentioned identifying information of reading and being stored in above-mentioned identifying information storage part, use and be stored in the operation of the corresponding value of above-mentioned identifying information in the above-mentioned identifying information storage part.
In certain embodiment, above-mentioned identifying information, comprise the fabricator that represents above-mentioned information recording carrier or batch data.
Program of the present invention is used in information record carrier carrying out each operation of above-mentioned recording power decision method.
Recording power determination device of the present invention, the recording power of decision recording portion light beam during record data toward information recording carrier in possesses: input part, the signal of the pairing a plurality of degree of modulation of a plurality of test record power is represented in its input; Calculating part, it passes through each test record power, n (power exponent n is the real number beyond the 1) power that calculates each test record power respectively amasss with corresponding degree of modulation is, obtain a plurality of products of corresponding above-mentioned a plurality of test record power, and according to the correlationship between above-mentioned a plurality of test record power and the above-mentioned a plurality of product, calculate the 1st recording power, and calculate above-mentioned recording power according to above-mentioned the 1st recording power; And, efferent, it will represent the signal of the recording power that aforementioned calculation portion is calculated, and export to above-mentioned recording portion.
In certain embodiment, aforementioned calculation portion generates the near linear of representing the correlationship between above-mentioned a plurality of test record power and the above-mentioned a plurality of product, and calculating above-mentioned product in above-mentioned near linear is 0 above-mentioned the 1st recording power.
In certain embodiment, the value of above-mentioned power exponent n is 2.
In certain embodiment, in the above-mentioned input part, be transfused to the value of expression Pind, the value of ρ, the signal of the value of κ, above-mentioned efferent, signal with the test record power in 0.9 times to 1.1 times the scope of value of the above-mentioned Pind of expression, export to above-mentioned recording portion, aforementioned calculation portion, by generating the near linear of the correlationship between the above-mentioned a plurality of test record power of expression and the above-mentioned a plurality of product, calculating above-mentioned product in above-mentioned near linear is 0 above-mentioned the 1st recording power, and calculate the product of above-mentioned the 1st recording power and (-1/ (value of κ)+2) and (value of ρ), calculate above-mentioned recording power.
In certain embodiment, in the above-mentioned input part, be transfused to the signal of value of the above-mentioned power exponent n of expression, aforementioned calculation portion uses the value of above-mentioned power exponent n.
In certain embodiment, above-mentioned power exponent n is a plurality of values, aforementioned calculation portion, to each of above-mentioned a plurality of values, obtain a plurality of products of corresponding above-mentioned a plurality of test record power respectively, by to each of a plurality of values, calculate the rectilinearity of the correlationship between above-mentioned a plurality of test record power and the above-mentioned a plurality of product respectively, calculate a plurality of rectilinearity of corresponding above-mentioned a plurality of values, determine the highest value of above-mentioned a plurality of value cathetuss, and the highest pairing value of rectilinearity is relevant in use and the above-mentioned a plurality of rectilinearity, the pairing a plurality of products of above-mentioned a plurality of test record power calculate above-mentioned the 1st recording power.
In certain embodiment, above-mentioned a plurality of values comprise the 1st value and the 2nd value; Above-mentioned the 1st value is 2, and above-mentioned the 2nd value is 3.
In certain embodiment, in the above-mentioned input part, be transfused to value, and the signal of the value of κ of value, the ρ of expression Pind; Above-mentioned efferent with the signal of the test record power in 0.9 times to 1.1 times the scope of value of the above-mentioned Pind of expression, is exported to above-mentioned recording portion; Aforementioned calculation portion generates near linear according to the correlationship between above-mentioned a plurality of test record power and the above-mentioned a plurality of product, and calculating above-mentioned product in above-mentioned near linear is 0 above-mentioned the 1st recording power.
In certain embodiment, aforementioned calculation portion is that 2 o'clock rectilinearity is under the high situation of 3 o'clock rectilinearity than the value of above-mentioned power exponent n in the value of above-mentioned power exponent n, calculates the product of above-mentioned the 1st recording power and (-1/ (value of κ)+2) and (value of ρ); The rectilinearity that in the value of above-mentioned power exponent n is at 3 o'clock is under the high situation of 2 o'clock rectilinearity than the value of above-mentioned power exponent n, calculates the product of above-mentioned the 1st recording power and (3 * (value of κ)-2)/(2 * (value of κ)-1) and (value of ρ).
In certain embodiment, above-mentioned a plurality of values comprise the 1st value and the 2nd value, aforementioned calculation portion,
To above-mentioned the 1st value, select at least two test record power in above-mentioned a plurality of test record power, set the 1st test record power group who constitutes by above-mentioned selected at least two test record power; According to all test record power of above-mentioned the 1st test record power group, and according to above-mentioned the 1st test record power group's the corresponding product of all test record power, generate the 1st straight line, and calculate the 1st slope of above-mentioned the 1st straight line; To above-mentioned the 1st value, do not become identical mode with test record power with above-mentioned the 1st test record power group, select at least two test record power in above-mentioned a plurality of test record power, set the 2nd test record power group who constitutes by above-mentioned selected at least two test record power; According to all test record power of above-mentioned the 2nd test record power group, and according to above-mentioned the 2nd test record power group's the corresponding product of all test record power, generate the 2nd straight line, and calculate the 2nd slope of above-mentioned the 2nd straight line; According to above-mentioned the 1st slope and above-mentioned the 2nd slope, obtain pairing the 1st ratio of above-mentioned the 1st value; To above-mentioned the 2nd value, select at least two test record power in above-mentioned a plurality of test record power, set the 3rd test record power group who constitutes by above-mentioned selected at least two test record power; According to all test record power of above-mentioned the 3rd test record power group, and according to above-mentioned the 3rd test record power group's the corresponding product of all test record power, generate the 3rd straight line, and calculate the 3rd slope of above-mentioned the 3rd straight line; To above-mentioned the 2nd value, do not become identical mode with test record power with above-mentioned the 3rd test record power group, select at least two test record power in above-mentioned a plurality of test record power, set the 4th test record power group who constitutes by above-mentioned selected at least two test record power; According to all test record power of above-mentioned the 4th test record power group, and according to above-mentioned the 4th test record power group's the corresponding product of all test record power, generate the 4th straight line, and calculate the 4th slope of above-mentioned the 4th straight line; According to above-mentioned the 3rd slope and above-mentioned the 4th slope, obtain pairing the 2nd ratio of above-mentioned the 2nd value; By more above-mentioned the 1st ratio and above-mentioned the 2nd ratio, determine above-mentioned the 1st value and the higher value of above-mentioned the 2nd value cathetus.
In certain embodiment, aforementioned calculation portion sets above-mentioned the 1st test record power group time, selects two maximum in above-mentioned a plurality of test record power recording powers; Set above-mentioned the 2nd test record power group time, select two minimum in above-mentioned a plurality of test record power recording powers; Set above-mentioned the 3rd test record power group time, select two maximum in above-mentioned a plurality of test record power recording powers; Set above-mentioned the 4th test record power group time, select two minimum in above-mentioned a plurality of test record power recording powers.
In certain embodiment, the 1st all average average power of the above-mentioned a plurality of test record power of expression to above-mentioned the 1st value, is calculated by aforementioned calculation portion; To above-mentioned the 2nd value, calculate the 2nd all average average power of the above-mentioned a plurality of test record power of expression; Set above-mentioned the 1st test record power group time, so that the mean value of test record power that belongs to above-mentioned the 1st test record power group selects to belong to above-mentioned the 1st test record power group's test record power greater than the mode of above-mentioned the 1st average power from above-mentioned a plurality of test record power; Set above-mentioned the 2nd test record power group time, so that the mean value of test record power that belongs to above-mentioned the 2nd test record power group selects to belong to above-mentioned the 2nd test record power group's test record power less than the mode of above-mentioned the 1st average power from above-mentioned a plurality of test record power; Set above-mentioned the 3rd test record power group time, so that the mean value of test record power that belongs to above-mentioned the 3rd test record power group selects to belong to above-mentioned the 3rd test record power group's test record power greater than the mode of above-mentioned the 2nd average power from above-mentioned a plurality of test record power; Set above-mentioned the 4th test record power group time, so that the mean value of test record power that belongs to above-mentioned the 4th test record power group selects to belong to above-mentioned the 4th test record power group's test record power less than the mode of above-mentioned the 2nd average power from above-mentioned a plurality of test record power.
In certain embodiment, above-mentioned efferent makes above-mentioned recording portion with the highest value of above-mentioned rectilinearity in above-mentioned a plurality of values to above-mentioned recording portion output signal, records in the above-mentioned information recording carrier.
Information record carrier of the present invention has: recording portion, use light beam record data in the information recording carrier; Read portion, the data of playback record in above-mentioned information recording carrier; And, the recording power determination device, determine the recording power of above-mentioned recording portion above-mentioned light beam during record data in above-mentioned information recording carrier, wherein, above-mentioned recording portion, with a plurality of test record power record test data in above-mentioned information recording carrier, the above-mentioned portion of reading, read the test data that in above-mentioned information recording carrier, is write down with each test record power respectively, generate signal, and measure the degree of modulation of the above-mentioned signal of corresponding each test record power respectively, above-mentioned recording power determination device, by to each test record power, n (power exponent n is the real number beyond the 1) power that calculates each test record power respectively amasss with corresponding degree of modulation is, obtains a plurality of products of the above-mentioned a plurality of test record power of correspondence, according to the correlationship between above-mentioned a plurality of test record power and the above-mentioned a plurality of product, calculate the 1st recording power, and, calculate above-mentioned recording power according to above-mentioned the 1st recording power.
In certain embodiment, the value of above-mentioned power exponent n is 2, in the above-mentioned information recording carrier, record the value of Pind, the value of ρ, and the value of κ, the above-mentioned portion of reading, read the value of above-mentioned Pind, the value of above-mentioned ρ, and the value of above-mentioned κ, above-mentioned recording power determination device, the scope of above-mentioned a plurality of test record power is made as 0.9 times to 1.1 times of value of above-mentioned Pind, above-mentioned recording power determination device, generate the near linear of the correlationship between the above-mentioned a plurality of test record power of expression and the above-mentioned a plurality of product, and to calculate in above-mentioned near linear above-mentioned product be 0 above-mentioned the 1st recording power, and calculate the product of above-mentioned the 1st recording power and (-1/ (value of κ)+2) and (value of ρ).
In certain embodiment, above-mentioned recording portion so that the above-mentioned signal that is generated by the above-mentioned portion of reading comprises the mode of the signal in a plurality of single cycles, writes down above-mentioned test data.
In certain embodiment, above-mentioned recording portion, by the light beam of modulating, in above-mentioned information recording carrier, form a plurality of marks and a plurality of blank, above-mentioned recording portion, so that the amplitude of the above-mentioned signal that generates by the above-mentioned portion of reading, with above-mentioned information recording carrier in the roughly the same mode of amplitude of the longest mark in the formed mark, form a plurality of marks.
In certain embodiment, above-mentioned recording power determination device, above-mentioned power exponent n is a plurality of values, to each of above-mentioned a plurality of values, obtain a plurality of products of corresponding above-mentioned a plurality of test record power respectively, by to each of a plurality of values, calculate the rectilinearity of the correlationship between above-mentioned a plurality of test record power and the above-mentioned a plurality of product respectively, calculate a plurality of rectilinearity of corresponding above-mentioned a plurality of values, determine the highest value of above-mentioned a plurality of value cathetuss, above-mentioned recording portion with the highest value of above-mentioned rectilinearity in above-mentioned a plurality of values, is recorded in the above-mentioned information recording carrier.
In certain embodiment, above-mentioned recording power determination device, storer with the highest value of storage rectilinearity.
In certain embodiment, in the above-mentioned information recording carrier, record the identifying information that is used for discerning above-mentioned information recording carrier, the above-mentioned portion of reading, read above-mentioned identifying information, in the above-mentioned storer, be provided with and be used for above-mentioned identifying information, the highest value of above-mentioned a plurality of value cathetuss with corresponding above-mentioned identifying information, be saved in the identifying information storage part in the identifying information storage part, above-mentioned identifying information, the highest value of above-mentioned a plurality of value cathetuss with corresponding above-mentioned identifying information, be saved to the identifying information storage part, above-mentioned recording power determination device, the identifying information of playback record in above-mentioned information recording carrier, judge the above-mentioned identifying information of reading whether be stored in above-mentioned identifying information storage part in identifying information identical, under the identical situation of identifying information in being judged as the above-mentioned identifying information of reading and being stored in above-mentioned identifying information storage part, use the pairing value of above-mentioned identifying information that is stored in the above-mentioned identifying information storage part.
In certain embodiment, above-mentioned identifying information, comprise the fabricator that represents above-mentioned information recording carrier or batch data.
Information recording carrier of the present invention, zone with the value that is used for depositing power exponent n (value of power exponent n is the real number beyond 1), and following asking for, by to each test record power, the n power that calculates each test record power in a plurality of test records respectively is long-pending with corresponding degree of modulation, obtain a plurality of products of corresponding above-mentioned a plurality of test record power, according to a plurality of products of above-mentioned a plurality of test record power with corresponding above-mentioned a plurality of test record power, come a plurality of values to power exponent n, obtain the rectilinearity of the correlationship of above-mentioned a plurality of test record power and above-mentioned a plurality of products, and with the value of the pairing power exponent n of rectilinearity the highest in above-mentioned a plurality of rectilinearity as a result of.
Recording power decision method of the present invention, the recording power of decision light beam during record data in information recording carrier, in the above-mentioned information recording carrier, record the value of Mind and the value of ρ, comprise: the operation of the value of playback record in above-mentioned information recording carrier, it comprises the operation of the value of the value of reading above-mentioned Mind and above-mentioned ρ; After in above-mentioned information recording carrier, having write down test data with a plurality of test record power, read the test data that is write down with each test record power respectively and generate signal, measure a plurality of degree of modulation of the above-mentioned signal of corresponding each test record power respectively, confirm the value of degree of modulation maximum in above-mentioned a plurality of degree of modulation greater than above-mentioned Mind, the degree of modulation of minimum is less than the operation of the value of above-mentioned Mind in above-mentioned a plurality of degree of modulation; Calculate the operation of the 1st recording power according to above-mentioned a plurality of test record power and above-mentioned a plurality of degree of modulation; And, according to the value of above-mentioned the 1st recording power and above-mentioned ρ, calculate the operation of above-mentioned recording power.
In certain embodiment, the above-mentioned operation of confirming, comprise: judge in above-mentioned a plurality of degree of modulation that maximum degree of modulation is whether less than the value of above-mentioned Mind, and in being judged as above-mentioned a plurality of degree of modulation under the maximum situation of degree of modulation less than the value of above-mentioned Mind, carry out record repeatedly with bigger a plurality of test record power, up to the operation that is measured to greater than the degree of modulation of the value of above-mentioned Mind; And, judge in above-mentioned a plurality of degree of modulation that minimum degree of modulation is whether greater than the value of above-mentioned Mind, and in being judged as above-mentioned a plurality of degree of modulation under the minimum situation of degree of modulation greater than the value of above-mentioned Mind, carry out record repeatedly with littler a plurality of test record power, up to the operation that is measured to less than the degree of modulation of the value of above-mentioned Mind.
In certain embodiment, the operation of aforementioned calculation the 1st recording power, comprise: by to each test record power, the n power (power exponent n is a real number) that calculates each test record power respectively is long-pending with corresponding degree of modulation, obtains the operation of a plurality of products of corresponding above-mentioned a plurality of test record power; And, according to the correlationship between above-mentioned a plurality of test record power and the above-mentioned a plurality of product, calculate the operation of the 1st recording power.
In certain embodiment, the operation of aforementioned calculation the 1st recording power, comprise: generate the near linear of the correlationship between the above-mentioned a plurality of test record power of expression and the above-mentioned a plurality of product, and calculating above-mentioned product in above-mentioned near linear is the operation of 0 above-mentioned the 1st recording power.
In certain embodiment, the value of above-mentioned power exponent n is 1.
In certain embodiment, in the above-mentioned information recording carrier, record the value of Pind and the value of κ; Above-mentioned operation of reading comprises the operation of the value of the value of reading above-mentioned Pind and above-mentioned κ; The above-mentioned operation of confirming, comprise 0.9 times to 1.1 times the operation that the scope of above-mentioned a plurality of test record power is made as the value of above-mentioned Pind, the operation of aforementioned calculation the 1st recording power, comprise the near linear that generates the correlationship between the above-mentioned a plurality of test record power of expression and the above-mentioned a plurality of product, and calculate the operation that in above-mentioned near linear above-mentioned product is 0 above-mentioned the 1st recording power, the operation of aforementioned calculation recording power comprises the operation of calculating above-mentioned the 1st recording power and the product of (value of κ) and (value of ρ).
In certain embodiment, the value of above-mentioned power exponent n is 2.
In certain embodiment, in the above-mentioned information recording carrier, record the value of Pind and the value of κ, above-mentioned operation of reading, the operation that comprises the value of the value of reading above-mentioned Pind and above-mentioned κ, the above-mentioned operation of confirming, comprise 0.9 times to 1.1 times the operation that the scope of above-mentioned a plurality of test record power is made as the value of above-mentioned Pind, the operation of aforementioned calculation the 1st recording power, comprise the near linear that generates the correlationship between the above-mentioned a plurality of test record power of expression and the above-mentioned a plurality of product, and calculate the operation that in above-mentioned near linear above-mentioned product is 0 above-mentioned the 1st recording power, the operation of aforementioned calculation recording power comprises the operation of calculating above-mentioned the 1st recording power and the product of (-1/ (value of κ)+2) and (value of ρ).
In certain embodiment, the above-mentioned operation of confirming comprises and calculates the operation of given recording power that above-mentioned degree of modulation is the value of above-mentioned Mind; And, so that the test record power of minimum is set the operation of the scope of above-mentioned a plurality of test record power greater than 0.9 times mode of above-mentioned given recording power in above-mentioned a plurality of test record power.
In certain embodiment, the above-mentioned operation of confirming comprises and calculates the operation of given recording power that above-mentioned degree of modulation is the value of above-mentioned Mind; And, so that the test record power of maximum is set the operation of the scope of above-mentioned a plurality of test record power less than 1.1 times mode of above-mentioned given recording power in above-mentioned a plurality of test record power.
In certain embodiment, the above-mentioned operation of confirming comprises so that the above-mentioned signal that generates comprises the mode of the signal in a plurality of single cycles, writes down the operation of above-mentioned test data.
In certain embodiment, in the above-mentioned information recording carrier, be formed with a plurality of marks and a plurality of blank by the light beam of modulating, and the above-mentioned operation of confirming, comprise so that the amplitude of the above-mentioned signal that generates, with the roughly the same mode of amplitude of mark the longest in the formed mark in the above-mentioned information recording carrier, form the operation of a plurality of marks.
In certain embodiment, in the above-mentioned information recording carrier, a plurality of orbit-shapeds become concentric circles or spiral fashion.
Program of the present invention is used in information record carrier carrying out each operation of above-mentioned recording power decision method.
Recording power determination device of the present invention, the recording power of decision recording portion light beam during record data in information recording carrier, comprise: input part, the signal of the value of a plurality of percentage modulation Mind of the corresponding a plurality of test record power of input expression and the value of ρ; Calculating part, it confirms the value of degree of modulation maximum in above-mentioned a plurality of degree of modulation greater than above-mentioned Mind, the degree of modulation of minimum is less than the value of above-mentioned Mind in above-mentioned a plurality of degree of modulation, and calculate the 1st recording power according to above-mentioned a plurality of test record power and above-mentioned a plurality of degree of modulation, according to the value of above-mentioned the 1st recording power and above-mentioned ρ, calculate above-mentioned recording power; And efferent, the signal of representing the recording power that aforementioned calculation portion is calculated is exported to recording portion.
In certain embodiment, aforementioned calculation portion, by to each test record power, the n power (power exponent n is a real number) that calculates each test record power respectively is long-pending with corresponding degree of modulation, obtain a plurality of products of corresponding above-mentioned a plurality of test record power, according to the correlationship between above-mentioned a plurality of test record power and the above-mentioned a plurality of product, calculate the 1st recording power, and calculate the product of the value of above-mentioned the 1st recording power and above-mentioned ρ.
In certain embodiment, aforementioned calculation portion generates the near linear of representing the correlationship between above-mentioned a plurality of test record power and the above-mentioned a plurality of product, and calculating above-mentioned product in above-mentioned near linear is 0 above-mentioned the 1st recording power.
In certain embodiment, the value of above-mentioned power exponent n is 1; In the above-mentioned input part, be transfused to the value of Pind and the value of κ; Above-mentioned efferent, signal with the test record power in 0.9 times to 1.1 times the scope of value of the above-mentioned Pind of expression, export to above-mentioned recording portion, aforementioned calculation portion, generate the near linear of the correlationship between the above-mentioned a plurality of test record power of expression and the above-mentioned a plurality of product, calculating above-mentioned product in above-mentioned near linear is 0 above-mentioned the 1st recording power, and calculates the product of above-mentioned the 1st recording power and (value of κ) and (value of ρ).
In certain embodiment, the value of above-mentioned power exponent n is 2; In the above-mentioned input part, be transfused to the value of Pind and the value of κ, above-mentioned efferent, signal with the test record power in 0.9 times to 1.1 times the scope of value of the above-mentioned Pind of expression, export to above-mentioned recording portion, aforementioned calculation portion, generate the near linear of the correlationship between the above-mentioned a plurality of test record power of expression and the above-mentioned a plurality of product, calculating above-mentioned product in above-mentioned near linear is 0 above-mentioned the 1st recording power, and calculates the product of above-mentioned the 1st recording power and (-1/ (value of κ)+2) and (value of ρ).
In certain embodiment, aforementioned calculation portion, calculating above-mentioned degree of modulation is the given recording power of the value of above-mentioned Mind, and so that the minimum value of above-mentioned a plurality of test record power greater than 0.9 times mode of above-mentioned given recording power, set above-mentioned a plurality of test record power, above-mentioned efferent is exported to above-mentioned recording portion with the signal of the above-mentioned a plurality of test record power that set of expression.
In certain embodiment, aforementioned calculation portion, calculating above-mentioned degree of modulation is the given recording power of the value of above-mentioned Mind, and so that the maximal value of above-mentioned a plurality of test record power less than 1.1 times mode of above-mentioned given recording power, set above-mentioned a plurality of test record power, above-mentioned efferent is exported to above-mentioned recording portion with the signal of the above-mentioned a plurality of test record power that set of expression.
Information record carrier of the present invention has: recording portion, use light beam record data in information recording carrier; Read portion, the data of playback record in above-mentioned information recording carrier; And the recording power determination device, determine the recording power of above-mentioned recording portion above-mentioned light beam during record data in above-mentioned information recording carrier in the above-mentioned information recording carrier, to record the value of Mind and the value of ρ; The above-mentioned portion of reading, read the value of above-mentioned Mind and the value of above-mentioned ρ, above-mentioned recording portion, with a plurality of test record power record test data in above-mentioned information recording carrier, the above-mentioned portion of reading, read the test data that in above-mentioned information recording carrier, is write down with each test record power respectively and generate signal, and a plurality of degree of modulation of the above-mentioned signal of the respectively corresponding above-mentioned a plurality of test record power of mensuration, above-mentioned recording power determination device, confirm the value of degree of modulation maximum in above-mentioned a plurality of degree of modulation greater than above-mentioned Mind, the degree of modulation of minimum is less than the value of above-mentioned Mind in above-mentioned a plurality of degree of modulation, and calculate the 1st recording power according to above-mentioned a plurality of test record power and above-mentioned a plurality of degree of modulation, according to the value of above-mentioned the 1st recording power and above-mentioned ρ, calculate above-mentioned recording power.
In certain embodiment, above-mentioned recording power determination device, judge in above-mentioned a plurality of degree of modulation that maximum degree of modulation is whether less than the value of above-mentioned Mind, and be judged as in above-mentioned a plurality of degree of modulation under the maximum situation of degree of modulation less than the value of above-mentioned Mind at above-mentioned recording power determination device, a plurality of test record power that the decision of above-mentioned recording power determination device is bigger are measured to degree of modulation greater than the value of above-mentioned Mind up to the above-mentioned portion of reading; Above-mentioned recording power determination device, judge in above-mentioned a plurality of degree of modulation that minimum degree of modulation is whether greater than the value of above-mentioned Mind, and be judged as in above-mentioned a plurality of degree of modulation under the minimum situation of degree of modulation greater than the value of above-mentioned Mind at above-mentioned recording power determination device, a plurality of test record power that the decision of above-mentioned recording power determination device is littler are measured to degree of modulation less than the value of above-mentioned Mind up to the above-mentioned portion of reading
In certain embodiment, above-mentioned recording power determination device, by to each test record power, the n power (power exponent n is a real number) that calculates each test record power respectively is long-pending with corresponding degree of modulation, obtain a plurality of products of corresponding above-mentioned a plurality of test record power, according to the correlationship between above-mentioned a plurality of test record power and the above-mentioned a plurality of product, calculate the 1st recording power, and calculate the product of the value of above-mentioned the 1st recording power and above-mentioned ρ.
In certain embodiment, the value of above-mentioned power exponent n is 1, in the above-mentioned information recording carrier, record the value of Pind and the value of κ, the above-mentioned portion of reading, read the value of above-mentioned Pind and the value of above-mentioned κ, above-mentioned recording power determination device, with the scope of above-mentioned a plurality of test record power decision 0.9 times to 1.1 times for the value of above-mentioned Pind, generate the near linear of the correlationship between the above-mentioned a plurality of test record power of expression and the above-mentioned a plurality of product, and to calculate in above-mentioned near linear above-mentioned product be 0 above-mentioned the 1st recording power, calculates the product of above-mentioned the 1st recording power and (value of κ) and (value of ρ).
In certain embodiment, the value of above-mentioned power exponent n is 2, in the above-mentioned information recording carrier, record the value of Pind and the value of κ, the above-mentioned portion of reading, read the value of above-mentioned Pind and the value of above-mentioned κ, above-mentioned recording power determination device, with the scope of above-mentioned a plurality of test record power decision 0.9 times to 1.1 times for the value of above-mentioned Pind, generate the near linear of the correlationship between the above-mentioned a plurality of test record power of expression and the above-mentioned a plurality of product, and to calculate in above-mentioned near linear above-mentioned product be 0 above-mentioned the 1st recording power, calculates the product of above-mentioned the 1st recording power and (-1/ (value of κ)+2) and (value of ρ).
In certain embodiment, above-mentioned recording power determination device, calculating above-mentioned degree of modulation is the given recording power of the value of above-mentioned Mind, and so that in above-mentioned a plurality of test record power minimum test record power determine the scope of above-mentioned a plurality of test record power greater than 0.9 times mode of above-mentioned given recording power.
In certain embodiment, above-mentioned recording power determination device, calculating above-mentioned degree of modulation is the given recording power of the value of above-mentioned Mind, and so that in above-mentioned a plurality of test record power maximum test record power determine the scope of above-mentioned a plurality of test record power less than 1.1 times mode of above-mentioned given recording power.
In certain embodiment, above-mentioned recording portion so that the above-mentioned signal packet that the above-mentioned portion of reading generates contains the mode of the signal in a plurality of single cycles, writes down above-mentioned test data.
In certain embodiment, above-mentioned recording portion, in above-mentioned information recording carrier, form a plurality of marks and a plurality of blank by the light beam of modulating, above-mentioned recording portion, so that the amplitude of the above-mentioned signal that the above-mentioned portion of reading generates, the roughly the same mode of amplitude with mark the longest in the formed mark in the above-mentioned information recording carrier forms a plurality of marks.
By recording power decision method of the present invention and recording power determination device, can determine suitable recording power, by like this, record data suitably.In addition, can also prevent that information recording carrier from worsening rapidly.
In addition,, can determine suitable recording power by program of the present invention, by like this, record data suitably.In addition, can also prevent that information recording carrier from worsening rapidly.
In addition,, can determine suitable recording power by information record carrier of the present invention, by like this, record data suitably.In addition, can also prevent that information recording carrier from worsening rapidly.
In addition,,, and use this value, do not need to carry out linear comparison, just can determine suitable recording power rapidly by the highest value of a plurality of value cathetuss of the power exponent of playback record in information recording carrier by information recording carrier of the present invention.
Description of drawings
Fig. 1 is the synoptic diagram of the CD among expression the present invention.
Fig. 2 is the synoptic diagram of the embodiment of expression optical disc apparatus of the present invention.
Fig. 3 forms the synoptic diagram of the relation between the pulse waveform of mark for two-value signal waveform and being used among explanation the present invention.
Fig. 4 is the synoptic diagram of the embodiment of the reproducing unit in the expression optical disc apparatus of the present invention.
Fig. 5 is the synoptic diagram of the embodiment of the recording power determination device in the expression optical disc apparatus of the present invention.
Fig. 6 is the process flow diagram that is used for illustrating the 1st embodiment of recording power decision method of the present invention.
Fig. 7 is the synoptic diagram that is used for illustrating in the 1st embodiment of recording power decision method of the present invention in CD with a plurality of test record power trace test datas.
Fig. 8 is the figure of the 1st embodiment of explanation recording power decision method of the present invention, (a) for the curve map of the relation between expression test record power and the degree of modulation, (b) be the curve map of the relation between expression test record power and (product of the quadratic power of degree of modulation and test record power).
Fig. 9 is the figure of the influence of the inclination in the 1st embodiment of explanation recording power decision method of the present invention, (a) for the curve map of the relation between expression recording power and the degree of modulation, (b) be the curve map of the relation between expression recording power and (product of the quadratic power of degree of modulation and recording power).
Figure 10 is the figure of the 1st embodiment of explanation recording power decision method of the present invention, is the curve map of the relation between expression test record power and the degree of modulation.
Figure 11 is the figure of the 1st embodiment of explanation recording power decision method of the present invention, is the curve map of the relation between expression test record power and (product of degree of modulation and test record power).
Figure 12 is the figure of the influence of the inclination in the 2nd embodiment of explanation recording power decision method of the present invention, (a) for representing the curve map of the relation between test record power and the degree of modulation, (b) for the curve map of the relation between expression test record power and (product of the quadratic power of degree of modulation and test record power), (c) be the curve map of the relation between expression test record power and (the three cubed product of degree of modulation and test record power).
Figure 13 is the process flow diagram of the 3rd embodiment of explanation recording power decision method of the present invention.
Figure 14 is the figure of the 3rd embodiment of explanation recording power decision method of the present invention, (a) for the curve map of the relation between expression test record power and the degree of modulation, (b) be the curve map of the relation between expression test record power and (product of the quadratic power of degree of modulation and test record power).
Figure 15 is the figure of the 4th embodiment of explanation recording power decision method of the present invention, (a) for the curve map of the relation between expression test record power and the degree of modulation, (b) be the curve map of the relation between expression test record power and (product of degree of modulation and test record power).
Figure 16 is the synoptic diagram of the general CD of expression.
Figure 17 is the synoptic diagram of expression optical disc apparatus in the past.
Figure 18 is the synoptic diagram of the reproducing unit in the expression optical disc apparatus in the past.
Figure 19 is the synoptic diagram that is used for illustrating degree of modulation.
Figure 20 is used for illustrating in recording power decision method in the past, in CD with the synoptic diagram of a plurality of test record power trace test datas.
Figure 21 is the figure of explanation the 1st recording power decision method in the past, is the curve map of the relation between expression test record power and the degree of modulation.
Figure 22 is the figure of explanation the 2nd recording power decision method in the past, is the curve map of the relation between expression test record power and (product of degree of modulation and test record power).
Figure 23 is the figure of the influence of the inclination in explanation the 1st recording power decision method in the past, is the curve map of the relation between expression recording power and the degree of modulation.
Figure 24 is the figure of explanation the 2nd recording power decision method in the past, is the curve map of the relation between expression test record power and (product of degree of modulation and test record power).
Among the figure: 100-optical disc apparatus, 101-CD, 102-shaven head, 104-reproducing unit, 106-demodulation ECC circuit, 108-recording power determination device, 110-determining recording power portion, 112-drive circuit for laser, 114-record data generating unit, 210-recording portion, 220-read portion.
Embodiment
(embodiment 1)
Below, contrast Fig. 1～Figure 11 describes the 1st embodiment of recording power decision method of the present invention and recording power determination device.
Fig. 1 is the synoptic diagram of the CD 101 in the expression present embodiment.CD 101 middle orbits (track) 301 form spiral fashion, and the light beam by to track 301 irradiation modulation overwriting power forms a plurality of marks (mark) and a plurality of blank (space), by carrying out the record of data like this in track 301.In the CD 101, employed recording power decision zone during the recording power of employed user data area and decision light beam when being provided with the user record data.Recording power decision zone is arranged in the zone beyond the user data area medial region or the outermost zone of CD 101 (particularly, for).
Fig. 2 has the synoptic diagram of optical disc apparatus 100 of the recording power determination device 108 of present embodiment for expression.Optical disc apparatus 100 has: use the recording portion 210 of light beam record data in CD 101, the portion of reading 220 of reading recorded data in the CD 101, decision recording portion 210 light beam during record data in CD 101 recording power recording power determination device 108 and demodulation ECC (Error Correcting Code) circuit 106.Recording portion 210 has shaven head 102, determining recording power portion 110, drive circuit for laser 112 and record data generating unit 114.Read portion 220 and have shaven head 102 and reproducing unit 104.
After CD 101 was loaded onto in the optical disc apparatus 100, the type of CD 101 was identified, and rotary CD 101.Shaven head 702 has semiconductor laser (not shown), when CD 101 rotations, by the light beam from the semiconductor laser institute outgoing of shaven head 102, irradiation CD 101.
During record data, shaven head 102 forms mark by having the light beam irradiates CD 101 of given recording power in CD 101 in CD 101.Here, by the marker edge recording mode, the data of Run Length Limited (1,7) modulation system are carried out record.In this case, in the CD 101, the shortest 2T to each reference period T of the longest 8T, is formed 7 kinds of marks and blank.
In addition, from CD 101 sense datas the time, shaven head 102 by the light beam irradiates CD 101 of the little regenerating power of power ratio recording power, and receives the light that is reflected by CD 101.Shaven head 102 generates the signal of recorded data in the expression CD 101 by received light is carried out light-to-current inversion.
Fig. 3 be used for illustrating the two-value signal waveform, with the synoptic diagram of the relation of the pulse waveform that is used for forming mark.That represents among Fig. 3 is the two-value signal waveform of corresponding 2T mark and the pulse waveform and the two-value signal waveform of corresponding 4T mark and the pulse waveform that is used for forming the 4T mark that are used for forming the two-value signal waveform of the pulse waveform of 2T mark, corresponding 3T mark and are used for forming the 3T mark.
The parameter of recording power is peak power (Pp), substrate bias power (Pe) and valley power (Pbw).In the present embodiment, the ratio of peak power, substrate bias power, valley power is certain.As shown in Figure 3, the pulse of expression Pp is 1 in the 2T mark, be 2 in the 3T mark, increases by 1 along with the long every increase T of mark.
The temporal parameter of pulse waveform is Ttop, dTtop, Tmp and dTe.Among Fig. 3, Ttop means that the 1st pulse represent the time of Pp, time after dTtop represents rising 1T constantly from the two-value signal waveform, till the rising constantly of the 1st pulse, Tmp means that the pulse beyond the 1st represents the time of Pp, dTe represent from the two-value signal waveform decline constantly, pulse to the end rises to the time till moment of Pe from Pbw.
In the present embodiment, peak power (Pp), substrate bias power (Pe) and valley power (Pbw) are to underlined (2T～8T) all identical.In addition, Tmp is also underlined identical to institute.Ttop, dTtop, dTe are divided into 2T, 3T, reach above these 3 kinds of 4T.
Referring again to Fig. 2.The reproducing unit 104 of the optical disc apparatus 100 shown in Fig. 2 is measured the degree of modulation by shaven head 102 signals that generated, and what simultaneously shaven head 102 is generated is signal digitalized.Demodulation ECC circuit 106, by reproducing unit 104 demodulation digitizings signal, and carry out error correction.Recording power determination device 108, according to the degree of modulation of being measured by reproducing unit 104, the recording power during the decision record data.Determining recording power portion 110, the determining recording power that recording power determination device 108 is determined is in drive circuit for laser 112.Record data generating unit 114, the data that generation will be write down in CD 101.Drive circuit for laser 112 drives shaven head 102, makes shaven head 102 with the data that generated in the record data generating unit 114, and the recording power that sets with determining recording power portion 110 is recorded in the CD 101.
Fig. 4 is the synoptic diagram of the reproducing unit 104 in the optical disc apparatus 100 of expression present embodiment.As shown in Figure 4, reproducing unit 104 has prime amplifier 201, sampling hold circuit 202, AD transducer 203, arithmetical unit 204 and binaryzation data generating unit 205.
Binaryzation data generating unit 205, with shaven head 102 generated signal digitalized, generate digitizing data (binaryzation data), with the signal 105 of expression binaryzation data, export to demodulation ECC circuit 106 and recording power determination device 108.
Fig. 5 is the synoptic diagram of the recording power determination device 108 of expression present embodiment.As shown in Figure 5, recording power determination device 108 has: the input part 401 of the signal 107 of input expression degree of modulation; Calculate the calculating part 402 of recording portion 210 recording power of the light beam during record data in CD 101; The efferent 403 that the determining recording power portion 110 of recording portion 210 is exported; And, storer 404.
Contrast Fig. 6 below, the recording power decision method of present embodiment is described.
In the CD 101, employed constant parameter when recording the decision recording power.Shown in the S12 of Fig. 6, shaven head 102 generates the signal 103 of the constant parameter that expression reads from CD 101 (below, be called set-point), and signal 103 is exported to reproducing unit 104.The binaryzation data generating unit 205 of reproducing unit 104, generation will be represented the signal 105 after signal 103 binaryzations of set-point, and signal 105 is exported to recording power determination device 108.
Shown in the S14 of Fig. 6, with a plurality of test record power record test data in CD 101.At this moment, recording power determination device 108, the signal 109 of 8 different test record power A～H that expression is predetermined is exported to determining recording power portion 110, determining recording power portion 110, A～H is set in the drive circuit for laser 112 with test record power.Here, test record power A is maximum test record power, and according to the order of test record power B～H, test record power reduces gradually.
Record data generating unit 114 generates test data, and the signal 115 of the test data that expression is generated is exported to drive circuit for laser 112.Drive circuit for laser 112 drives shaven head 102, makes shaven head 102 in the recording powers decision zone of CD 101, from given position on about 1 week of track the continuous recording test data.Record data generating unit 114 generates test data, makes to form 8T mark and 8T blank continuously by shaven head 102 in CD 101.In the CD 101, in about 1 week of CD 101, duplicate record test record power A～H.Among Fig. 7, in CD 101, represent the zone of corresponding test record power A～H by A～H.By in about 1 week of CD 101, repeatedly repeating record like this, can on the peripheral direction of CD 101, the influence of dip deviation be eliminated.
Referring again to Fig. 6.After the end of record (EOR) of test data, shown in the S16 of Fig. 6, the shaven head 102 with regenerating power to CD 101 illumination beams.By like this, playback record in the track of CD 101 test data and generate signal.The amplitude of shaven head 102 signals that generated according to whether being formed with mark on the CD 101 changes.Shaven head 102 signals that generated 103 input to reproducing unit 104.
As shown in Figure 3, in the reproducing unit 104, prime amplifier 201 amplifying signals 103.Sampling hold circuit 202 keeps the peak value and the valley of the signal that amplified by prime amplifier 201.A/D transducer 203, the peak value and the valley digitizing of the signal that sampling hold circuit 202 is kept.Arithmetical unit 204, the computing digitizing peak value and valley, the degree of modulation of coming picked up signal.Because the amplitude of signal 103 is different because of test record power A～H, so degree of modulation is according to test record power A～H and difference.Arithmetical unit 204 generates the signal 107 of the degree of modulation of expression signal, and signal 107 is exported to recording power determination device 108.
As shown in Figure 5, the input part 401 of recording power determination device 108, by arithmetical unit 204 from reproducing unit 104, the signal 107 of the degree of modulation of the corresponding test record power A～H of input expression.
Shown in the S18 of Fig. 6, the calculating part 402 of recording power determination device 108 calculates the product of the quadratic power of the degree of modulation of corresponding test record power A and test record power A.In addition, calculating part 402 to each test record power B～H, calculates the product of the quadratic power of the degree of modulation of corresponding test record power and test record power.By like this, calculating part 402 obtains a plurality of products of corresponding test record power A～H.
Next, shown in the S20 of Fig. 6, calculating part 402 according to the correlationship between a plurality of test record power A～H and a plurality of product, calculates the 1st recording power.Specifically, calculating part 402 generates the near linear of the correlationship of a plurality of test record power of expression and a plurality of products, and near linear is that 0 recording power is made as the 1st above-mentioned recording power with product.Below, contrast Fig. 8 is elaborated.
Fig. 8 (a) is the curve map of the relation between the degree of modulation of expression test record power and corresponding test record power, and Fig. 8 (b) is for representing the curve map of the relation between test record power and (product of the quadratic power of degree of modulation and test record power).Can learn from Fig. 8 (a) and Fig. 8 (b), the rectilinearity of the correlationship of test record power and degree of modulation is lower, and it is relative therewith, the rectilinearity of the correlationship between test record power and (product of the quadratic power of degree of modulation and test record power) is higher, in the curve map of Fig. 8 (b), 8 points of corresponding test record power A～H almost are arranged in a straight line.
Next, shown in the S22 of Fig. 6, calculating part 402 calculates recording power according to recording power P500.Specifically, by the specified value that is write down in recording power P500 and the CD 101 is carried out computing, calculate recording power.
In addition, all right service routine, CPU (not shown) is carried out by each one of above-mentioned step control optical disc apparatus 100, and in addition, this program can be recorded in the computer-readable recording mediums such as not shown EEPROM or ROM, RAM, hard disk, magnetic recording media.
Next, contrast Fig. 9 describes the recording power under the situation that has produced relative tilt between CD 101 and the shaven head 102 and the relation of degree of modulation.
Fig. 9 (a) is the curve map identical with the curve map of Figure 23 for the curve map of the relation between the degree of modulation of expression recording power and corresponding record power.In the curve map of Fig. 9 (a), the result who all produces during record and when reading recorded data under the situation about tilting represents by solid line 1201A, the result who has produced during record and do not produced when reading under the situation of inclination represents by solid line 1202A, and the result who has all produced during record and when reading under the situation about tilting represents by solid line 1203A.Produced the degree of modulation under the situation about tilting, littler than the degree of modulation that does not produce under the situation about tilting.Do not produce when reading and tilt and produced during record under the situation about tilting, in 8 recording powers, the degree of modulation of the test record power H that recording power is minimum can't be measured.Equally, under when record and when reading had all produced situation about tilting, the degree of modulation of test record power H also can't be measured.
Fig. 9 (b) is in recording power shown in the presentation graphs 9 (a) and the degree of modulation, the curve map of the relation between recording power and (product of the quadratic power of degree of modulation and recording power).In the curve map of Fig. 9 (b), the result who all produces during record and when reading under the situation about tilting represents by solid line 1201B, the result who has produced during record and do not produced when reading under the situation of inclination represents by solid line 1202B, and the result who has all produced during record and when reading under the situation about tilting represents by solid line 1203B.
As mentioned above, reading of the record of test data and test data carried out before user data, after the test data record, read test data immediately.Therefore, if producing record test data under the state of opposing inclined, and read test data, just obtain the result shown in solid line 1203A and solid line 1203B.
According to present embodiment, recording power determination device 108 is shown in the curve map of Fig. 9 (b), calculating (product of the quadratic power of degree of modulation and test record power) is 0 recording power P1203, according to recording power P1203 and the specified value that is recorded in the CD 101, calculate recording power, and will represent the signal 109 of the recording power that calculated, export to determining recording power portion 110.
At this moment, among the result shown in the solid line 1203B, the influence of the inclination during except record, the influence of the inclination when also being subjected to reading.As mentioned above, because during the decision recording power, the influence of the inclination in the time of can only considering record, therefore the recording power that should select this moment is recording power P1202 in essence, but shown in Fig. 9 (b), can confirm, according to the selected recording power P1203 of the recording power decision method of present embodiment, in fact almost equal with the recording power P1202 that should select originally.
Also be, (product of the quadratic power of degree of modulation and test record power) is 0 recording power, be in CD 101, to form the necessary critical recording power of mark, under situation about writing down by the recording power bigger than this recording power, owing to no matter whether produce inclination when reading, all can determine non-0 degree of modulation, therefore think that (product of the quadratic power of degree of modulation and test record power) is 0 recording power, no matter whether produced the inclination when reading, all equated.
As mentioned above,,, also can determine suitable recording power, by so suitable record data even under the situation that has produced the relative tilt between CD and the shaven head by present embodiment.In addition, by present embodiment, can prevent that CD worsens rapidly when repeating to write down.
In addition,, be not limited in inclination, under the pressure of these two kinds of deteriorations of deterioration of the degree of modulation the when deterioration of the degree of modulation when producing record and regeneration, also can determine suitable recording power by present embodiment.
In addition, present embodiment is with require with the optical disc apparatus that more BD of High Accuracy Control recording power (Blu-ray Disc) standard is as the criterion for high density writes down in, effective especially.
In addition, make the disc manufacturer of the CD that is as the criterion with the BD standard, before CD dispatches from the factory, the recording power Pwo that recommends when being predetermined in CD record data.This recording power Pwo is decided to be, desirable optical disc apparatus by this recording power Pwo in desirable CD after the record data, measure suitable degree of modulation after the sense data, but owing to have individual difference in CD and the optical disc apparatus, even therefore optical disc apparatus is with recording power Pwo record data, when reading, also not necessarily just can measure suitable degree of modulation.
Therefore, optical disc apparatus is investigated the relation between a plurality of test record power and the degree of modulation when record data in CD, decide suitable recording power.Employed constant parameter was recorded in the CD in advance when disc manufacturer will determine suitable recording power.This constant parameter is Pind, ρ, κ, Mind.Detailed content will be explained below, and is used for the suitable recording power of in CD record data, uses than little recording power Pind of recording power Pwo and the relation between recording power Pind and the degree of modulation Mind and decides.This be because, if directly determine recording power Pwo, then (1) is because near the degree of modulation of recording power Pwo is saturated, therefore as shown in Figure 9, be difficult to detect and tilting etc. disturbed the variation of optimal recording power together outward, (2) if the decision of duplicate record power, then CD 101 can worsen.
Contrast Figure 10 and Figure 11 below, the relation between the recording power Pwo that the sheet disc manufacturer is recommended and Pind, ρ, κ, the Mind describes.
Disc manufacturer after the decision recording power Pwo, next determines recording power Pind, and according to the relation of ρ=(recording power Pwo)/(recording power Pind), decision ρ.
Disc manufacturer is read as shown in figure 10 with the mode that forms the 8T mark data with recording power Pind record, and will be made as degree of modulation Mind to the degree of modulation of signal that should data.
In addition, disc manufacturer is read the test data of using a plurality of test record power traces in 0.9 times to 1.1 times the scope of recording power Pind in the mode that forms the 8T mark as shown in figure 11, generates signal, and a plurality of degree of modulation of measured signal.A plurality of degree of modulation, corresponding a plurality of test record power respectively.
Disc manufacturer is calculated the product of degree of modulation and test record power respectively to each test record power, and the correlationship according between a plurality of test record power and a plurality of product calculates recording power Pthr.Specifically, generate the near linear of the correlationship between a plurality of test record power of expression and a plurality of product, and will to be similar to product in the straight line be that 0 recording power is made as recording power Pthr.Next, according to the relation of κ=(recording power Pind)/(recording power Pthr), decision κ.
Disc manufacturer, in advance with the value record of the value of the value of the value of Pind and ρ, κ, Mind in CD 101.
In the present embodiment, according to the relation between test record power and the degree of modulation, calculating with degree of modulation is 0 the suitable value of recording power Pthr, and calculate recording power (promptly suitable value) with Pind according to the value of recording power Pthr and κ, according to the value of this recording power and ρ, calculate recording power Pw.
Below, the recording power method of the present embodiment under the situation that CD is as the criterion with the BD standard describes.
The value of the κ of reproducing unit 104 playback records in CD 101 and the value of ρ, reproducing unit 104 will be represented the signal 105 of the value of the value of κ and ρ, export to recording power determination device 108.
After the recording portion 210 usefulness test record power A～H record test datas of optical disc apparatus 100, reproducing unit 104 is measured a plurality of degree of modulation of corresponding a plurality of test record power.Reproducing unit 104 with representing the signal 107 of a plurality of degree of modulation of corresponding a plurality of test record power, is exported to recording power determination device 108.
After reading test data, obtain shown in Fig. 8 (a) as a result the time, recording power determination device 108 is shown in Fig. 8 (b), the product that calculates the quadratic power of degree of modulation and test record power is 0 recording power P500, (formula 1) according to shown below calculates the recording power Pw1 that is used for record data.
Pw1=P500 * (-1/ κ+2) * ρ ... (formula 1)
Recording power determination device 108 with the signal 109 of the recording power Pw1 that calculated of expression, is exported to determining recording power portion 110.
As implied above, by present embodiment, because the rectilinearity height of the correlationship of test record power and (product of the quadratic power of degree of modulation and test record power) therefore can irrespectively determine suitable recording power with the scope of test record power.
In addition, though in the above explanation, using (product of the quadratic power of degree of modulation and test record power), the value of also promptly using the power exponent n of test record power is product under 2 the situation, calculate the 1st recording power (P500), but the present invention is not limited to this.Because of the structure of CD or the property difference of recording film, when the value of power exponent n was a value beyond 2 sometimes, the rectilinearity of the correlationship between test record power and (product of the n power of degree of modulation and test record power) increased.Therefore, the value of power exponent n is not limited in 2.
But, as described in above contrast Figure 22, be under 1 the situation, also to be that the rectilinearity of the correlationship between test record power and (product of degree of modulation and test record power) is lower in the value of power exponent, promptly in the curve map of Figure 22, the some off-straight of being marked and drawed.
Therefore, the value of power exponent n can be the real number beyond 1.In value about power exponent n, when being experimentized, existing several CDs find that for example the value at power exponent n is at 1.5～2.5 o'clock, the rectilinearity of the correlationship between test record power and (product of the n power of degree of modulation and test record power) increases.But the value of power exponent n is not limited in this, and the value of power exponent n for example can be 0.5, or 0 ,-1.
According to present embodiment, owing to can increase the rectilinearity of the correlationship of test record power and (product of the n power of degree of modulation and test record power), therefore irrelevant with test record power, the product that can calculate the n power of degree of modulation and test record power is 0 recording power.
In addition, as shown in Figure 7, can also implement record by 8 test record power A～H, for example carry out record with 4 test record power A～D, or carry out record with 4 test record power E～H, or carry out record with 4 test record power C～F, also can suitably obtain recording power P500.Under the situation of using the zone decision recording power of giving sizing, by reducing the number of test record power, can increase multiplicity, improve the precision of the recording power that is determined.
In addition, preferably in CD 101, write down the value of power exponent n.By the value of record power exponent n in CD 101, can improve the degree of freedom of the design of the structure of CD 101 and the recording film in the CD 101.
The recording power decision method of present embodiment, as the optical disc apparatus that is as the criterion with the BD specification,, effective especially in order to write down requirement to high-density more accurately in the optical disc apparatus of controlling recording power.
(embodiment 2)
Contrast Figure 12 below, the 2nd embodiment of recording power decision method of the present invention and recording power determination device is described.
The recording power determination device 108 of present embodiment, the identical formation of recording power determination device with embodiment 1 illustrated with contrasting Fig. 5, optical disc apparatus 100 with recording power determination device 108 of present embodiment also has identical formation with contrast Fig. 2 illustrated optical disc apparatus in embodiment 1.Therefore, for fear of tediously long, in the recording power determination device 108 of present embodiment and the record of optical disc apparatus 100, omitted the part that repeats with the explanation of embodiment 1.
The recording power determination device 108 of present embodiment, be with the difference of recording power determination device illustrated in the embodiment 1, to each of a plurality of values of power exponent n, calculate the product of the n power of degree of modulation and test record power, calculate the rectilinearity of the correlationship of test record power and (product of the n power of degree of modulation and test record power), use the highest value of a plurality of value cathetuss, decide recording power.
Contrast Fig. 2 and Fig. 5 below is that the recording power decision method under 2 and 3 the situation describes to the value of power exponent n.
Reproducing unit 104 with representing the signal 107 of a plurality of degree of modulation of corresponding a plurality of test record power, is exported to recording power determination device 108.In the recording power determination device 108, by the arithmetical unit 204 from reproducing unit 104, the signal 107 of the degree of modulation of corresponding test record power A～H is represented in input in the input part 401.
Figure 12 (a) is the curve map of the relation between the degree of modulation of expression test record power and corresponding test record power, Figure 12 (b) is the curve map of the relation between expression test record power and (product of the quadratic power of degree of modulation and test record power), and Figure 12 (c) is the curve map of the relation between expression test record power and (the three cubed product of degree of modulation and test record power).
Here with reference to Figure 12 (b) and Figure 12 (c), relatively describe linear.
Next, calculating part 402, with the 1st than with the 2nd than comparing, be judged as the 1st than with the 2nd than near the rectilinearity height of 1 the pairing value of that side, calculating part 402 as mentioned above, according to the pairing correlationship of the high value of rectilinearity, the calculating recording power.Like this, because therefore the calculating part 402 correlationship decision recording power higher according to rectilinearity can determine more suitable recording power.
But linear comparative approach is not limited in this.Though in the above explanation, calculating part 402, near the maximal value of a plurality of test record power slope and near the slope the minimum value are compared, but calculating part 402 also can use other method, comes near slope the maximal value of a plurality of test record power and near the slope the minimum value are compared.
Calculating part 402 is under 2 the situation at power exponent n, calculates the 1st all average average power of a plurality of test record power of expression.Next, calculating part 402, to allow the average of the test record power that belongs to certain group (below be called the 1st test record power group) in a plurality of test record power, mode greater than the 1st average power, from a plurality of test record power, select to belong at least two test record power of the 1st test record power group, generate the 1st straight line of the correlationship between the product that expression belongs to the 1st test record power group's test record power and corresponding these test record power, and calculate the 1st slope of the 1st straight line.Calculating part 402, also to allow the average of the test record power that belongs to another group (below be called the 2nd test record power group) in a plurality of test record power, mode less than the 1st average power, from a plurality of test record power, select to belong at least two test record power of the 2nd test record power group, generate the 2nd straight line of the correlationship between the product that expression belongs to the 2nd test record power group's test record power and corresponding these test record power, and calculate the 2nd slope of the 2nd straight line.Next, calculating part 402 is calculated the 1st ratio according to the 1st slope and the 2nd slope meter.
Calculating part 402, at power exponent n be under 3 the situation too, calculate the 2nd all average average power of a plurality of test record power of expression.Next, calculating part 402, to allow the average of the test record power that belongs to certain group (below be called the 3rd test record power group) in a plurality of test record power, mode greater than the 2nd average power, from a plurality of test record power, select to belong at least two test record power of the 3rd test record power group, generate the 3rd straight line of the correlationship between the product that expression belongs to the 3rd test record power group's test record power and corresponding these test record power, and calculate the 3rd slope of the 3rd straight line.In addition, calculating part 402, also to allow the average of the test record power that belongs to another group (below be called the 4th test record power group) in a plurality of test record power, mode less than the 2nd average power, from a plurality of test record power, select to belong at least two test record power of the 4th test record power group, generate the 4th straight line of the correlationship between the product that expression belongs to the 4th test record power group's test record power and corresponding these test record power, and calculate the 4th slope of the 4th straight line.Next, calculating part 402 is calculated the 2nd ratio according to the 3rd slope and the 4th slope meter.
Next, calculating part 402, be judged as the 1st than with the 2nd than in ratio near the rectilinearity height of 1 the pairing value of that side.
As implied above, the high value of value cathetus of selection power exponent n.
In addition, the linear comparative approach in the present embodiment is not limited in this.Calculating part 402, can be to each of a plurality of values, that setting is made of 2 test record power in a plurality of test record power at least, certain test record power group, and do not become identical mode with test record power with above-mentioned certain test record power group, that setting is made of 2 test record power selecting from a plurality of test record power at least, another test record power group, and each different test record power group formed straight line, the slope of calculated line comes the comparison rectilinearity.
More detailed says, calculating part 402, to being worth 2, select at least two test record power in a plurality of test record power, the 1st test record power group that setting is made of selected two test record power at least, according to all test record power of the 1st test record power group, with the 1st test record power group's the pairing product of all test record power, generate the 1st straight line, and calculate the 1st slope of the 1st straight line.In addition, calculating part 402, to being worth 2, do not become identical mode with test record power with the 1st test record power group, select at least two test record power in a plurality of test record power, set the 2nd test record power group who is constituted by selected at least two test record power, according to all test record power of the 2nd test record power group, with the 2nd test record power group's the pairing product of all test record power, generate the 2nd straight line, and calculate the 2nd slope of the 2nd straight line.Next, calculating part 402 calculates the 1st ratio according to the 1st slope and the 2nd slope.
A plurality of comparative approach more than have been described, and in any one comparative approach, calculating part 402 is more than 1 at a side ratio, and the opposing party's ratio is under the situation below 1, can calculate is the inverse of the ratio more than 1, selects that side near 1 under than the state that is below 1 at any one.Perhaps, calculating part 402, at a side ratio be more than 1, the opposing party is than being under the situation below 1, is calculated as the inverse of the ratio below 1, any one than the state that is more than 1 under, select that side near 1.
In addition, above-mentioned a plurality of comparative approach, but be the example of linear comparative approach, as long as can compare the rectilinearity of correlationship, use arbitrary method all can.
In addition, with illustrated the same in the embodiment 1, be under 3 the situation in the value of power exponent n, (the three cubed product of degree of modulation and test record power) is 0 recording power, be in CD 101, to form the necessary critical recording power of mark, under the situation of using the recording power bigger to write down than this recording power, no matter whether produce the inclination when reading, can both determine degree of modulation, therefore think that (the three cubed product of degree of modulation and test record power) is 0 recording power, no matter the inclination that whether has produced when reading all equates.
In addition, developed CD in recent years, but by present embodiment, can suitably determine the value of power exponent n each of a plurality of recording films of 1 CD with a plurality of recording films.
In addition, in the recording power determination device 108 of present embodiment, efferent 402, in the mode of value record in CD 101 that a plurality of value cathetuss of power exponent n are the highest, to recording portion 210 output signals, recording portion 210 value record that a plurality of value cathetuss of power exponent n are the highest is in CD 101.In the CD 101, can set in advance the zone of the highest value of a plurality of value cathetuss of being used for writing down power exponent n, perhaps the highest value of a plurality of value cathetuss of power exponent n can be recorded in the user data area of CD 101.Like this, in the given area of CD 101, record under the situation of the highest value of a plurality of value cathetuss of power exponent n, load the optical disc apparatus 100 of this CD 101, when the decision recording power, the highest value of a plurality of value cathetuss of the power exponent n that write down in the CD 101 is read, and, do not need to carry out linear comparison by using this value, just can determine suitable recording power rapidly.
Perhaps, the highest value of a plurality of value cathetuss of power exponent n also can be recorded in the optical disc apparatus 100.
In the present embodiment, record the identifying information that is used for discerning CD 101 in the CD 101.Identifying information for example is a relevant information of making the disc manufacturer of CD 101, or CD 101 batch relevant information.
Reproducing unit 104 is read the identifying information that is write down in the CD 101, and reproducing unit 104 will be represented the signal 105 of identifying information, export to recording power determination device 108.
In the input part 401 of recording power determination device 108, be transfused to the signal 105 of expression identifying information.In the storer 404 of recording power determination device 108, be provided with the identifying information storage part.Calculating part 402, determine after the highest value of a plurality of value cathetuss of the pairing power exponent n of identifying information of CD 101, with the identifying information of CD 101, with the highest value of a plurality of value cathetuss of the pairing power exponent n of this identifying information, be kept in the identifying information storage part of storer 404.
Since store in the storer 404 CD 101 identifying information, with the highest value of a plurality of value cathetuss of the pairing power exponent n of this identifying information, therefore after CD 101 is loaded onto in the optical disc apparatus 100, reproducing unit 104 is read the identifying information of the CD 101 that is loaded, the calculating part 402 of recording power determination device 108 judges that the identifying information read is whether identical with the identifying information preserved in the identifying information storage part.Be judged as under the identifying information the read situation identical at calculating part 402 with identifying information in being kept at the identifying information storage part, calculating part 402, the highest value of a plurality of value cathetuss of the power exponent n that preserved in the storer 404 is read, by using this value, do not need a plurality of values are carried out linear comparison, just can determine suitable recording power rapidly.
In addition, present embodiment is also identical with embodiment 1, and is effective especially in the optical disc apparatus that is as the criterion with the BD standard.
As implement described in the mode 1, in the CD that is as the criterion with the BD standard, recording the value of Pind and the value of ρ, the value of κ, the value of Mind in advance, reproducing unit 104 is read the value of ρ and the value of κ.
Under the value that calculating part 402 is judged as power exponent n was 2 o'clock rectilinearity condition with higher, calculating part 402 calculated the recording power P500 as Figure 12 (b) as shown in, according to (formula 1) calculating recording power Pw1 shown below.
Pw1=P500 * (-1/ κ+2) * ρ ... (formula 1)
In addition, under the value that calculating part 402 is judged as power exponent n was 3 o'clock rectilinearity condition with higher, calculating part 402 calculated the recording power P600 as Figure 12 (c) shown in, and according to (formula 2) calculating recording power Pw1 shown below.
Pw1=P600 * (3 κ-2) * (2 κ-1) * ρ ... (formula 2)
In addition, though in the above explanation, the value of power exponent n is 2 and 3, because of the characteristic difference of the recording film of the structure of CD or CD, when being the value beyond 2 and 3 sometimes, rectilinearity is higher.In the present embodiment, the value of power exponent n is not limited in 2 and 3, as long as the value of power exponent is the real number beyond 1, value can arbitrarily.When calculating recording power, the coefficient relevant with κ and ρ changes according to the value of power exponent n.For example, be that calculating part 402 calculates recording power Pw1 according to (formula 2 ') shown below under 0 the situation in the value of power exponent n.
Pw1=P700 * (1/ (2-κ)) * ρ ... (formula 2 ')
Here, P700 is by being to generate the near linear of the correlationship between a plurality of test record power of expression and a plurality of product under 0 the situation at power exponent n, and to calculate product in the near linear be that 0 recording power obtains.
For reference, be that as described in contrast Figure 22, recording power Pw1 calculates according to formula shown below under 1 the situation in the value of power exponent n.
Pw1＝Pthr×κ×ρ
Here, Pthr is to be to generate the near linear of the correlationship between a plurality of test record power of expression and a plurality of product under 1 the situation at power exponent n, and to calculate product in the near linear be that 0 recording power obtains.
In addition, though in the above explanation, two values are compared rectilinearity, present embodiment is not limited in this, in the present embodiment, can also compare rectilinearity to the value more than 3.For example, the value of power exponent can determine the higher value of rectilinearity from 2,2.5,3 these 3 values.
Pass through present embodiment, according to the correlationship between test record power and (product of the n of degree of modulation and test record power (n is the real number beyond 1) power), calculate at least two values that the value cathetus is higher of power exponent n, by like this, can with the scope of test record power irrespectively, determine suitable recording power.
(embodiment 3)
Contrast Figure 14 below, the 3rd embodiment of recording power decision method of the present invention and recording power determination device is described.
The recording power determination device 108 of present embodiment, the identical formation of recording power determination device that also has the embodiment 1 illustrated with contrasting Fig. 5, optical disc apparatus 100 with recording power determination device 108 of present embodiment also has identical formation with contrast Fig. 2 illustrated optical disc apparatus in embodiment 1.Therefore, for fear of tediously long, in the recording power determination device 108 of present embodiment and the record of optical disc apparatus 100, omitted the part that repeats with the explanation of embodiment 1.
Contrast Figure 13 below, the recording power decision method of present embodiment is described.
As mentioned above, in the given area of the CD 101 that is as the criterion with the BD standard, record the value of Pind, the value of ρ, the value of κ, the value of Mind, shown in the S32 of Figure 13, reproducing unit 104 is read the value of Pind, the value of ρ, the value of κ and the value of Mind from CD 101.Reproducing unit 104 with the signal 105 of the value of the value of the value of value, the ρ of expression Pind, κ, Mind, is exported to recording power determination device 108.
Shown in the S34 of Figure 13, confirm degree of modulation maximum in a plurality of degree of modulation greater than (value of Mind), degree of modulation minimum in a plurality of degree of modulation is less than (value of Mind).
At this moment, recording power determination device 108, when record test data, decision test record power A～H makes that the difference of adjacent test record power is below at least 10% of value of Pind.
After test record power A～H record test data, reproducing unit 104 is measured a plurality of degree of modulation of corresponding a plurality of test record power.Reproducing unit 104 with representing the signal 107 of a plurality of degree of modulation of corresponding a plurality of test record power, is exported to recording power determination device 108.
The calculating part 402 of recording power determination device 108 is confirmed degree of modulation maximum in a plurality of degree of modulation greater than (value of Mind), and degree of modulation minimum in a plurality of degree of modulation is less than (value of Mind).Specifically, calculating part 402 judges that whether maximum degree of modulation is less than (value of Mind).Be judged as under the maximum situation of degree of modulation at calculating part 402 less than (value of Mind), calculating part 402, setting is greater than the test record power of before test record power, and efferent 403, and the signal 109 of the test record power of expression new settings is exported to recording portion 210.Recording portion 210 is with the test record power trace test data of new settings.Reproducing unit 104 is read the test data of new record, and calculating part 402 judges that once more whether maximum degree of modulation is less than (value of Mind).Calculating part 402 is set bigger a plurality of test record power, is measured to degree of modulation greater than the value of Mind up to reproducing unit 104.
In addition, calculating part 402 judges that whether minimum degree of modulation is greater than (value of Mind).Be judged as under the minimum situation of degree of modulation at calculating part 402 greater than (value of Mind), calculating part 402 is set the test record power less than before test record power, efferent 403 will be represented the signal 109 of the test record power of new settings, export to recording portion 210.Recording portion 210 is with the test record power trace test data of new settings.Reproducing unit 104 is read the test data of new record, and calculating part 402 judges that once more whether minimum degree of modulation is greater than (value of Mind).Calculating part 402 is set littler a plurality of test record power, is measured to degree of modulation less than the value of Mind up to reproducing unit 104.
Like this, calculating part 402 is confirmed maximum degree of modulation greater than (value of Mind), and minimum degree of modulation is less than (value of Mind).
Figure 14 (a) is the curve map of the relation between expression test record power and the degree of modulation.Calculating part 402 confirms that the degree of modulation of minimum test record power H is below the Mind shown in Figure 14 (a), the degree of modulation of maximum test record power A is greater than (value of Mind).
Next, calculating part 402 confirms maximum degree of modulation greater than (value of Mind), and minimum degree of modulation is calculated the product of the quadratic power of a plurality of degree of modulation of corresponding a plurality of test record power and a plurality of test record power less than (value of Mind) afterwards.
Figure 14 (b) is the curve map of the relation between expression test record power and (product of the quadratic power of degree of modulation and test record power).
Next, in the S36 of Figure 13, calculating part 402 shown in Figure 14 (b), generates the near linear of the correlationship between a plurality of test record power of expression and a plurality of product, and product is 0 recording power P500 in the calculating near linear.
Next, shown in the S38 of Figure 13, calculating part 402 is according to recording power P500, according to (formula 1) shown below, calculates and is used for the recording power Pw1 of user data.
Pw1=P500 * (-1/ κ+2) * ρ ... (formula 1)
According to present embodiment, confirm the relation between degree of modulation and (value of Mind), by confirming that minimum degree of modulation is less than (value of Mind), maximum degree of modulation is greater than (value of Mind), come the scope of the recording power that the scope of employed test record power is close with disc manufacturer decision Pind the time to implement record, thereby can more suitably obtain the recording power that disc manufacturer is recommended.
In addition, though in the above explanation, confirm that minimum degree of modulation is less than (value of Mind), maximum degree of modulation is greater than (value of Mind), but can be by adding test record power minimum in a plurality of test record power, this condition more than 0.9 times that is about the recording power of Mind for degree of modulation comes with disc manufacturer decision Pind the time the more approaching scope of scope of employed test record power to implement record, can obtain the recording power that disc manufacturer is recommended more exactly.
In addition, by adding test record power maximum in a plurality of test record power, 1.1 times of recording power that are about Mind for degree of modulation are with interior this condition, come the scope of the more approaching test record power of with disc manufacturer decision Pind time scope of employed test record power to implement record, thereby can obtain the recording power that disc manufacturer is recommended more exactly.
In addition, by making minimum test record power, be about more than 0.9 times of recording power of Mind for degree of modulation, and maximum test record power, be about below 1.1 times of recording power of Mind for degree of modulation, can obtain the recording power that disc manufacturer is recommended more exactly.
In addition, relatively degree of modulation is that the front and back surplus of the recording power of Mind can not be 10% also, as long as the test record power of the scope that the scope of employed test record power is close with disc manufacturer decision Pind the time is implemented record.
In addition, can infer from the curve map of Figure 14 (a), along with recording power increases, the width that is formed on the mark in the CD 101 broadens, the result causes degree of modulation to increase, and recording power reach certain degree above after, it is big that the influence of the restriction that track width brings becomes, the width of mark is saturated, and degree of modulation is also saturated thereupon.In the relation of recording power and degree of modulation, the size of recording power can be divided into 3 scopes.The 1st scope is, degree of modulation is not subjected to the scope (less than the scope of test record power H) of the influence ground increase of track fully, the 2nd scope is, the scope that degree of modulation increases in the influence that is subjected to track (test record power H is to the scope of test record power A), the 3rd scope be, degree of modulation is subjected to the influence of track and saturated scope (greater than the scope of test record power A).
Shown in Figure 14 (b), though in the scope of test record power A～H, correlationship between test record power and (product of the quadratic power of degree of modulation and test record power), demonstrate higher rectilinearity, but in the recording power and recording power greater than test record power A less than test record power H, therefore the essential factor difference of decision mark width not necessarily demonstrates high rectilinearity.
Have, the scope of the recording power till from the critical recording power that forms mark to test record power H is very narrow again.In addition, in the recording power greater than test record power A,, therefore be difficult to detect and the variation of disturbing optimal recording power together outward because degree of modulation is saturated.Therefore, the scope of decision employed degree of modulation during recording power, the scope that increases when preferably degree of modulation is subjected to the influence of track.
Be at recording power under the situation of the scope that influence ground that degree of modulation is not subjected to track fully increases, exist CD 101 or shaven head to be attached with on 102 to have produced relative tilt between dust or CD 101 and the shaven head 102 or outer disturb or such as defocus because of the temperature variation of shaven head 102 situations such as intensity minimizing from the light beam of bare headed 102 outgoing, in addition, be in that degree of modulation is subjected to the influence of track and under the situation of saturated scope at recording power, existence is with shaven head 102 temperature variation, situation about increasing from the intensity of the light beam of 102 outgoing of shaven head.
As mentioned above, under the situation of degree of modulation of test record power H greater than the value of Mind, set test record power once more less than before test record power, come record test data once more, equally, under the situation of degree of modulation of test record power A, set test record power once more greater than before test record power less than the value of Mind, come record test data once more, but present embodiment is not limited in this.Can also enlarge the scope of test record power, only use the scope of given degree of modulation, the decision recording power.
But, in order to enlarge the scope of test record power, need to increase the poor of adjacent recording power, or the zone of using when enlarging the decision recording power, but the problem that exists is, the former precision is relatively poor, and the latter has increased time till the decision recording power or the consumption in the employed zone of decision recording power is accelerated.Particularly, owing to can't cover in the CD of Worm type, therefore preferably do not enlarge this mode of the employed zone of decision recording power.Therefore, preferably the difference of adjacent test record power is made as below 10% of value of Pind, record test data in the posting field below 1 track, to form the 8T mark, and only under the situation in the scope of not falling given degree of modulation, set record test data after the scope of test record power once more.By like this, can determine high-precision recording power at short notice.
As mentioned above, recording power decision method and recording power determination device by present embodiment can determine suitable recording power.
(embodiment 4)
Below contrast Figure 15, the 4th embodiment of recording power decision method of the present invention and recording power determination device is described.
In the embodiment 3,, calculate the 1st recording power, but the present invention is not limited to this according to the relation between a plurality of test record power and (product of the quadratic power of degree of modulation and test record power).
In the present embodiment, be that 1 situation describes to power exponent.
The recording power determination device 108 of present embodiment, also has the illustrated identical formation of recording power determination device in embodiment 1 with contrast Fig. 5, optical disc apparatus 100 with recording power determination device 108 of present embodiment also has identical formation with contrast Fig. 2 illustrated optical disc apparatus in embodiment 1.Therefore, for fear of tediously long, in the recording power determination device 108 of present embodiment and the explanation of optical disc apparatus 100, omitted the part that repeats with the explanation of embodiment 1.
As mentioned above, in the given area of the CD 101 that is as the criterion with the BD standard, record the value of Pind, the value of ρ, the value of κ, the value of Mind.The recording power determination device 108 of present embodiment, confirm that maximum degree of modulation is greater than (value of Mind), minimum degree of modulation is less than (value of Mind), recording power determination device illustrated in this point and the embodiment 3 is identical, therefore omits in the recording power determination device 108 of present embodiment the part that the explanation with embodiment 3 repeats.
Figure 15 (a) is the curve map of the relation between expression test record power and the pairing degree of modulation of test record power.The calculating part 402 of recording power determination device 108, shown in Figure 15 (a), the degree of modulation of confirming minimum test record power H is less than (value of Mind), and the degree of modulation of maximum test record power A is greater than (value of Mind).
Next, calculating part 402 confirms maximum degree of modulation greater than (value of Mind), and minimum degree of modulation is calculated the product of a plurality of degree of modulation and a plurality of test record power less than (value of Mind) afterwards.
Figure 15 (b) is the curve map of the relation between expression test record power and (product of degree of modulation and test record power).
Pw1=P1500 * κ * ρ ... (formula 3)
In present embodiment, confirm the relation between degree of modulation and (value of Mind), by confirming that degree of modulation minimum in the degree of modulation is less than (value of Mind), degree of modulation maximum in the degree of modulation is greater than (value of Mind), test record power that can the scope that the scope of employed test record power is close with disc manufacturer decision Pind the time is implemented record, thereby can obtain the recording power that disc manufacturer is recommended more exactly.
In addition, in the above explanation, confirm that minimum degree of modulation is less than (value of Mind), maximum degree of modulation is greater than (value of Mind), but can also add minimum test record power, this condition more than 0.9 times that is about the recording power of Mind for degree of modulation, by like this, can be with the time with disc manufacturer decision Pind the test record power of the more approaching scope of the scope of employed test record power implement record, thereby can obtain the recording power that disc manufacturer is recommended more exactly.
Equally, by adding maximum test record power, this condition below 1.1 times that is about the recording power of Mind for degree of modulation, can be with the time with disc manufacturer decision Pind the test record power of the more approaching scope of the scope of employed test record power implement record, thereby can obtain the recording power that disc manufacturer is recommended more exactly.
In addition, by making minimum test record power, be about more than 0.9 times of recording power of Mind for degree of modulation, and maximum test record power, be about below 1.1 times of recording power of Mind for degree of modulation, can obtain the recording power that disc manufacturer is recommended more exactly.
Relatively degree of modulation is that the front and back surplus of the recording power of Mind can not be 10% also in addition, as long as the scope of the approaching test record power of the scope of employed test record power is implemented record with disc manufacturer decision Pind the time.
Be under 1 the situation in the value of power exponent, shown in Figure 15 (b), the rectilinearity of the correlationship of test record power and (product of degree of modulation and test record power), sometimes be that 2 o'clock the rectilinearity of correlationship is good like that not as the value of power exponent, because sometimes because of the scope of the test record power that sets, product is that the value of 0 recording power Pthr has change slightly, therefore compare the 3rd higher embodiment of rectilinearity of test record power and the correlationship of (product of degree of modulation and test record power), preferably the test record power enforcement record of the approaching scope of the scope of employed test record power with disc manufacturer decision Pind the time.
In addition, in the above explanation, under the situation of degree of modulation of test record power H greater than (value of Mind), set than the low test record power of test record power before once more and come record test data once more, equally, under the situation of degree of modulation of recording power A less than the value of Mind, the high-power test record power of test record when writing down before the setting ratio once more, come record test data once more, but also can enlarge the scope of test record power, only use the scope of given degree of modulation, the decision recording power.
But, in order to enlarge the scope of test record power, needs to increase the poor of adjacent test record power or enlarge the employed zone of decision recording power, and the problem that exists being that the former precision is relatively poor, the latter has increased the time till the decision recording power.Same with the 3rd embodiment, preferably the difference of test record power is made as below 10% of value of Pind, posting field record test data below 1 track, and only under the situation that can't determine recording power is set record test data after the scope of test record power once more.By like this, can determine high-precision recording power at short notice.
In addition, in the above embodiment 3～4, be that 1 situation and 2 situation are illustrated to the value of power exponent, but power exponent can be got value arbitrarily so long as real number gets final product.In addition, in the embodiment 3～4, also can be described in enforcement mode 2, so that the mode that the rectilinearity of test record power and the correlationship of (product of the n power of degree of modulation and test record power) increases, the value of selection power exponent n.In this case, because the rectilinearity height of the pairing correlationship of value of power exponent n,, also can unique decision product be 0 recording power, thereby can in the shorter time, determine suitable recording power even therefore the scope of test record power is bigger.In addition, in this case, also preferably with the value record of selected power exponent n in CD.By with the value record of power exponent n in CD, can enlarge the degree of freedom of disc manufacturer design record film.
As mentioned above,, from CD 101, read (value of Mind) by embodiment 3～4,, calculate the product of the n power of degree of modulation and recording power with reference to the value of Mind, by like this, the recording power in the time of can suitably determining record data.
In addition, though the optical disc apparatus of above-mentioned embodiment 1～4, record data in CD, and the data of regenerative recording in CD, the present invention is not limited to this.The present invention can be applicable to, before record data, and the information record carrier that writes down with a plurality of test record power.
In addition, though in the above-mentioned embodiment 1～4, use CD as information recording carrier, the present invention is not limited to this.The present invention can be applied to determine the information recording carrier arbitrarily of recording power.
In addition, though in the above-mentioned embodiment 1～4, come record data with Run Length Limited (1,7) modulation system, the present invention is not limited to this.The present invention can also use other recording modes.Under the situation of using the modulation system beyond Run Length Limited (1, the 7) modulation system, preferably the longest mark that comprises in many these modes is implemented record with the pairing test data of the white continuous signal of vast sky.In addition, the present invention can use the signal in single cycle arbitrarily.Using under the situation of the signal in single cycle arbitrarily, the amplitude of the signal that the amplitude of preferred signals and longest mark and vast sky are white is a same degree.
In addition, though in the above-mentioned embodiment 1～4, peak power (Pp), substrate bias power (Pe) and valley power (Pbw) are common to all marks, Tmp is common to all marks, and the present invention is not limited to this.As with the parameter that decides recording power, can also use other parameters.
In addition, though in the above-mentioned embodiment 1～4, Ttop, dTtop, dTe are divided into 2T, 3T, reach these 3 kinds more than the 4T, the present invention is not limited to this.Classification also can be used other sorting technique.
In addition, though in the above-mentioned embodiment 1～4, peak power, substrate bias power, and the ratio of valley power be certain, the present invention is not limited to this.Can also distinguish independent decision peak power, substrate bias power and valley power.For example in decision during peak power, fixed-bias transistor circuit power and valley power, thus determine each power respectively.
In addition, though in the above-mentioned embodiment 1～4, with 8 test record power trace test datas, the present invention is not limited to this.The present invention can be applied to situation about writing down with a plurality of test record power.
In addition, though in the above-mentioned embodiment 1～4, recording power determination device 108 is predetermined test record power A～H, the present invention is not limited to this.Recording power determination device 108 can not be predetermined recording power A～H, determining recording power portion 110, and the signal of the test record power A～H that expression can be set in the drive circuit for laser 112 is exported to recording power determination device 108.
In addition, though in the above-mentioned embodiment 1～4, recording power determination device 108 decision recording powers under the inscape of recording power determination device and periphery is combined in situation among the IC, also have identical effect.
By recording power decision method of the present invention and recording power determination device, can determine suitable recording power, by like this, record data suitably.In addition, can prevent that CD from worsening fast.In addition, in the optical disc apparatus that is as the criterion with the BD standard that requires the High Accuracy Control recording power for high density writes down, effective especially.
Claims (7)
1. the recording power of recording power determination device, decision recording portion light beam during toward the information recording carrier record data, wherein,
Have: input part, the signal of a plurality of degree of modulation (A-B)/A that input expression is tried to achieve according to peak A and valley B, wherein peak A and valley B are the peak value and the valley of the signal that generates respectively by reading the test data that is write down by a plurality of test record power;
Calculating part, by to each test record power, the product of the n power that calculates each test record power respectively and corresponding degree of modulation, obtain the pairing a plurality of products of above-mentioned a plurality of test record power, generate the near linear of the correlationship of the above-mentioned a plurality of test record power of expression and above-mentioned a plurality of products, calculating product in above-mentioned near linear is that 0 test record power is as the 1st recording power, and the product of value that calculates the regulation that writes down in above-mentioned the 1st recording power and the above-mentioned information recording carrier is as above-mentioned recording power, and wherein power exponent n is the real number beyond 1; And,
Efferent, the signal of the recording power that expression is calculated by aforementioned calculation portion is exported to above-mentioned recording portion.
2. the recording power of recording power decision method, decision light beam during toward the information recording carrier record data, wherein,
Comprise: the operation of the signal of a plurality of degree of modulation (A-B)/A that input expression is tried to achieve according to peak A and valley B, wherein peak A and valley B are the peak value and the valley of the signal that generates respectively by reading the test data that is write down by a plurality of test record power;
By to each test record power, the product of the n power that calculates each test record power respectively and corresponding degree of modulation obtains the operation of the pairing a plurality of products of above-mentioned a plurality of test record power, and wherein power exponent n is the real number beyond 1;
Generate the near linear of the above-mentioned a plurality of test record power of expression and the correlationship of above-mentioned a plurality of products, calculating product in above-mentioned near linear is 0 the test record power operation as the 1st recording power; And,
The product of value that calculates the regulation that writes down in above-mentioned the 1st recording power and the above-mentioned information recording carrier is as the operation of above-mentioned recording power.
3. an information record carrier has: with the recording portion of light beam toward the information recording carrier record data; Read the portion of reading of the data that write down in the above-mentioned information recording carrier; The recording power determination device of the recording power of the above-mentioned light beam with the above-mentioned recording portion of decision during toward above-mentioned information recording carrier record data, in the above-mentioned information record carrier,
Above-mentioned recording portion, with the past above-mentioned information recording carrier record test data of a plurality of test record power,
The above-mentioned portion of reading reads respectively with the test data of each test record power trace in above-mentioned information recording carrier, generates signal, and obtains degree of modulation respectively according to the peak value and the valley of the pairing above-mentioned signal of each test record power,
Above-mentioned recording power determination device, by to each test record power, the product of the n power that calculates each test record power respectively and corresponding degree of modulation, obtain the pairing a plurality of products of above-mentioned a plurality of test record power, generate the near linear of the correlationship of the above-mentioned a plurality of test record power of expression and above-mentioned a plurality of products, calculating product in above-mentioned near linear is that 0 test record power is as the 1st recording power, and the product of value that calculates the regulation that writes down in above-mentioned the 1st recording power and the above-mentioned information recording carrier is as above-mentioned recording power, and wherein power exponent n is the real number beyond 1.
4. the recording power of information recording method, decision light beam during toward the information recording carrier record data, and carry out record with above-mentioned recording power, comprising:
With the operation of a plurality of test record power toward above-mentioned information recording carrier difference record test data;
Read test data respectively, generate signal with each test record power trace, and the operation of obtaining degree of modulation respectively according to the peak value and the valley of the pairing above-mentioned signal of each test record power;
By to each test record power, the product of the n power that calculates each test record power respectively and corresponding degree of modulation obtains the operation of the pairing a plurality of products of above-mentioned a plurality of test record power, and wherein power exponent n is the real number beyond 1;
Generate the near linear of the above-mentioned a plurality of test record power of expression and the correlationship of above-mentioned a plurality of products, calculating product in above-mentioned near linear is 0 the test record power operation as the 1st recording power;
The product that calculates the value of the regulation that writes down in above-mentioned the 1st recording power and the above-mentioned information recording carrier calculates the operation of above-mentioned recording power; And,
Operation with above-mentioned recording power record data.
5. the recording power of recording power determination device, decision recording portion light beam during toward the information recording carrier record data has:
Input part, the signal of input expression a plurality of degree of modulation (A-B)/value of A, Mind, the value of ρ, wherein a plurality of degree of modulation (A-B)/A are according to the peak A and the valley B of the signal that generates respectively obtain by reading the test data that is write down by a plurality of test record power;
Calculating part, confirm that degree of modulation maximum among above-mentioned a plurality of degree of modulation is bigger than the value of above-mentioned Mind, and degree of modulation minimum among above-mentioned a plurality of degree of modulation is littler than the value of above-mentioned Mind, and the above-mentioned a plurality of test record power of generation expression, and the near linear of the correlationship between the product of 2 powers of above-mentioned a plurality of degree of modulation and above-mentioned test record power, calculating product in above-mentioned near linear be 0 test record power as the 1st recording power, calculate above-mentioned the 1st recording power, the value of above-mentioned ρ, and the product of (1/ (value of κ)+2) obtained according to the value κ of the regulation that writes down in the above-mentioned information recording carrier is as above-mentioned recording power; And,
The signal of the recording power that expression is calculated by aforementioned calculation portion is exported to recording portion,
Above-mentioned Mind is value Pind record data of using the recording power littler than the recommendation recording power Pwo of information recording carrier manufacturer, and by reading the degree of modulation of the signal that recorded data obtains,
Above-mentioned ρ is the value that Pwo obtains divided by Pind.
6. the recording power of recording power decision method, decision light beam during toward the information recording carrier record data records value with Mind and the value of ρ in the above-mentioned information recording carrier, this method comprises:
Read the operation of the value that is write down in the above-mentioned information recording carrier, comprising the operation of the value of value of reading above-mentioned Mind and ρ;
With a plurality of test record power after above-mentioned information recording carrier record test data, read test data respectively with each test record power trace, generate signal, and measure a plurality of degree of modulation (A-B)/A that peak A and valley B according to the pairing above-mentioned signal of each test record power obtain respectively, confirm degree of modulation maximum among above-mentioned a plurality of degree of modulation than the value of above-mentioned Mind the minimum degree of modulation operation littler among bigger and above-mentioned a plurality of degree of modulation than the value of above-mentioned Mind;
Generate the above-mentioned a plurality of test record power of expression, with the product of 2 powers of above-mentioned a plurality of degree of modulation and above-mentioned test record power between the near linear of correlationship, calculating product in above-mentioned near linear is 0 the test record power operation as the 1st recording power; And,
The product of (1/ (value of κ)+2) of calculating the value of above-mentioned the 1st recording power, above-mentioned ρ and obtaining according to the value κ of the regulation that writes down in the above-mentioned information recording carrier is as the operation of above-mentioned recording power,
Above-mentioned Mind is value Pind record data of using the recording power littler than the recommendation recording power Pwo of information recording carrier manufacturer, and by reading the degree of modulation of the signal that recorded data obtains,
Above-mentioned ρ is the value that Pwo obtains divided by Pind.
7. an information record carrier has: with the recording portion of light beam toward the information recording carrier record data; Read the portion of reading of the data that write down in the above-mentioned information recording carrier; The recording power determination device of the recording power of the above-mentioned light beam with the above-mentioned recording portion of decision during toward above-mentioned information recording carrier record data, in the above-mentioned information record carrier,
Record value with Mind and the value of ρ in the above-mentioned information recording carrier,
The value of above-mentioned Mind and the value of above-mentioned ρ are read by the above-mentioned portion of reading,
Above-mentioned recording portion, with the past above-mentioned information recording carrier record test data of a plurality of test record power,
The above-mentioned portion of reading, read respectively with the test data of each test record power trace in above-mentioned information recording carrier, generate signal, and the peak A and the valley B of pairing above-mentioned signal obtain a plurality of degree of modulation (A-B)/A separately according to above-mentioned a plurality of test record power
Above-mentioned recording power determination device, confirm that degree of modulation maximum among above-mentioned a plurality of degree of modulation is bigger than the value of above-mentioned Mind, and degree of modulation minimum among above-mentioned a plurality of degree of modulation is littler than the value of above-mentioned Mind, and the above-mentioned a plurality of test record power of generation expression, and the near linear of the correlationship between the product of 2 powers of above-mentioned a plurality of degree of modulation and above-mentioned test record power, calculating product in above-mentioned near linear is that 0 test record power is as the 1st recording power, calculate above-mentioned the 1st recording power, the value of above-mentioned ρ, and the product of (1/ (value of κ)+2) obtained according to the value κ of the regulation that writes down in the above-mentioned information recording carrier is as above-mentioned recording power
Above-mentioned Mind is value Pind record data of using the recording power littler than the recommendation recording power Pwo of information recording carrier manufacturer, and by reading the degree of modulation of the signal that recorded data obtains,
Above-mentioned ρ is the value that Pwo obtains divided by Pind.
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| JP2004057198 | 2004-03-02 | ||
| JP2004-057198 | 2004-03-02 | ||
| JP2004057198 | 2004-03-02 | ||
| JP2004208135 | 2004-07-15 | ||
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| CN2008101781239A Active CN101409081B (en) | 2004-01-28 | 2005-01-27 | Recording power decision method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2002222523A (en) * | 2001-01-26 | 2002-08-09 | Nec Corp | Calculating method of recording state detecting index and optical disk recording method using the same, and optical disk recorder |
| JP2003067925A (en) * | 2001-08-27 | 2003-03-07 | Teac Corp | Optical disk device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2001307326A (en) * | 2000-04-20 | 2001-11-02 | Teac Corp | Optical disk recorder |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2002222523A (en) * | 2001-01-26 | 2002-08-09 | Nec Corp | Calculating method of recording state detecting index and optical disk recording method using the same, and optical disk recorder |
| JP2003067925A (en) * | 2001-08-27 | 2003-03-07 | Teac Corp | Optical disk device |
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| CN1906670A (en) | 2007-01-31 |
| CN100452184C (en) | 2009-01-14 |
| CN101409081A (en) | 2009-04-15 |
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