CN100356453C - Optical disk identifying method in optical disk reading/recording system - Google Patents

Optical disk identifying method in optical disk reading/recording system Download PDF

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Publication number
CN100356453C
CN100356453C CNB200410054099XA CN200410054099A CN100356453C CN 100356453 C CN100356453 C CN 100356453C CN B200410054099X A CNB200410054099X A CN B200410054099XA CN 200410054099 A CN200410054099 A CN 200410054099A CN 100356453 C CN100356453 C CN 100356453C
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recognition time
identification
dvd
reads
read
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CN1744203A (en
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李钟旭
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Shanghai LG Electronics Co Ltd
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Shanghai LG Electronics Co Ltd
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Abstract

The present invention relates to a disk identification method in a disk reading /recording system, which comprises: checking identification time which is updated in advance, and determining the determinate identification time or the updated identification time as the identification time; sending out a laser, measuring the time from a surface to a recording surface, comparing the measuring time and the determinate identification time, and identifying whether the disk is a DVD or a CD. If the disk is the DVD, the ID is read; if the disk is the CD, the Sub-Q is read. If the read is unsuccessful, an identification error sign is determined as 1, the DVD is forcibly identified as the CD, the CD is forcibly identified as the DVD, and the read is carried out repeatedly; if the read is successful, the reading /recording preparation is ended by a disk driver which is identified at present when the indexed identification error sign is not 1; when the indexed identification error sign is 1, the reduced or the increased identification time is used to update, store and end the reading /recording preparation by the driver. The present invention increases the accuracy and the speed of the disk system to the identification of the CD/ the DVD.

Description

CD reads/optical disc discriminating method in the register system
(1) technical field
The invention relates to CD and read/register system, especially a kind of CD about identification CD and DVD CD reads/optical disc discriminating method in the register system.
(2) background technology
CD reads/and register system generally has CD and DVD.Because these CD and DVD use different wavelength of laser mutually,, can not read DVD with CD laser simultaneously so can not read CD with DVD laser.
Therefore, existing CD can only read in CD Player, and existing DVD can only read in DVD player.
In addition, the CD of exploitation reads/register system recently, reading initial stage identification record density different CD and DVD mutually, uses the laser of respective wavelength to read, thereby CD and DVD can be read under a device.
Above CD reads/method of register system identification CD and DVD, can be discerned because of following difference.
In general, the maximum differential of CD and DVD is exactly that distance from the optical disc surface to the record surface is different mutually.
That is, the distance of DVD from the optical disc surface to the record surface is 0.6mm, and the distance of CD from the optical disc surface to the record surface is 1.2mm, so DVD and CD exist 2 times range difference.And if shaven head lifts with same speed, DVD and CD exist 2 times mistiming too from the time that optical disc surface arrives record surface so.
So,, be easy to distinguish CD and DVD if detection is measured the time between these two faces from the signal of optical disc surface and record surface.
Fig. 1 is when lifting after shaven head falls with the DVD that prior art is made, and laser is through the phenomenon synoptic diagram of surface emitting to record surface, and the distance of optical disc surface and record surface is 0.6mm among Fig. 1, and record surface thickness is 0.1 μ m.
The RF signal that RF horizontal signal that Fig. 2 sends when then displayed map 1 laser is by the surface and laser send during by record surface.
Among Fig. 2, under the focus driver effect, during shaven head falls and lifts, the RF signal that RF horizontal signal that laser sends during by the surface and laser send during by record surface.At this moment, the time between two horizontal signals of Fig. 2 is used T DVDExpression, that is, and T DVDJust be meant when surface signal reaches certain level begin, the value of clocking that the record surface signal finishes when reaching certain level.
Fig. 3 is when lifting after shaven head falls with the CD that prior art is made, and laser is through the phenomenon synoptic diagram of surface emitting to record surface, and the distance of optical disc surface and record surface is 1.2mm among Fig. 3, and record surface thickness is 0.1 μ m.
Fig. 4 then displayed map 3 shaven heads through surface and the RF horizontal signal that sends during record surface.
Among Fig. 4, under the focus driver effect, during shaven head falls and lifts, the RF signal that RF horizontal signal that laser sends during by the surface and laser send during by record surface.At this moment, the time between two horizontal signals of Fig. 4 is used T CDExpression.That is T, CDBecause of the thickness of CD CD than the thick twice of DVD, so it is T DVD2 times.
Owing to have this species diversity, be used for distinguishing the interlude T of CD and DVD JBe T CD75%, be T DVD150%, T J=0.75T CD=1.5T DVD
Fig. 5 a and Fig. 5 b are the CD that makes with prior art and the process flow diagram of DVD recognition methods.At this moment, in order to ensure the accuracy of RF horizontal signal, compare CD laser and will at first use DVD laser.
Therefore S1, as Fig. 5 a and Fig. 5 b, at first opens (emission) DVD laser.
S2 under focus driver is operated in situation without any signal, falls shaven head.
S3 then lifts shaven head again.
S4, and, before detecting the surface, allow timer be in holding state, judge whether to carry out the surface and detect, wait until the surface detection in this step always.
S5 if detect the surface, then picks up counting.
S6, then, continuing before the detection record face increases timing, judges whether to carry out record surface and detects, and waits until that in this step record surface detects always.
S7 is if the detection record face then stops timing.
S8 then stores above-mentioned clocking value T.
S9, and, because of the mistiming from the surface to the record surface of being intended to discern CD and DVD is 2 times, so determine recognition time T with 1.5 times of values of DVD time J
S10, below, the minute T of more above-mentioned storage and the recognition time T that determines J(T＜T J).
S11, comparative result is if minute T is than definite time T JFew, identification is DVD.
S16 is if minute T is than definite time T JMany, then identification is CD.
S12 is by the minute T and the recognition time T that determine of step S10 to above-mentioned storage JComparison, if identification is DVD, adjust servomechanisms such as the focusing be suitable for DVD and tracking.
S13 starts the DVD servo function then.
S14 then, reads the ID that stores DVD CD position information.Read ID and be because finish correct identification, have only servomechanisms such as the focusing of selecting to be suitable for the DVD CD and tracking just might realize CD.
S15 at this moment, judges and reads (detection) ID success or not.
S26 if above-mentioned judged result is to read the ID success, just finishes the preparation that CD drive reads/writes down, and prepares to accept the order of reading CD of main frame.
S16, and if above-mentioned judged result is to read the ID failure, the optical disc recognition error is promptly thought CD by mistake to be the error of DVD, and will allow optical disk system force identification is CD.
Then, by minute T and the definite recognition time T of step S10 in above-mentioned storage JComparison, identification is CD.
S17 if be identified as CD, then opens (emission) CD laser.
S18 adjusts CD servomechanisms such as the focusing be suitable for CD and tracking.
S19 starts servo function.
S20 then, reads the Sub-Q that stores CD position information.Read Sub-Q and be because finish correct identification, have only servomechanisms such as the focusing of selecting to be suitable for the CD CD and tracking just might realize CD.
S21 at this moment, judges and reads (detection) Sub-Q success or not.
S26 if above-mentioned judged result is to read the Sub-Q success, so just because of having done correct identification, finishes the preparation that CD drive reads/writes down.
And if above-mentioned judged result is to read the Sub-Q failure, will force identification is DVD, and restarts the DVD identification work of above explanation.
S22, S23/S24, S25, as mentioned above, before successfully reading ID and Sub-Q, even if resemble decide back the number m this process of circular flow, if but hit a slump, also can be because of the gross error of CD, and the difficulty in the identification, and being carried out nonrecognition, CD handles (n++, n＜m?).
In the identification that utilizes said method to CD and DVD, the official post detection time signal of surface signal and record surface signal is forced to occur on the focus driver, and then makes bare headed lifting/lowering.So the mistiming of detecting and this driver are inversely proportional to the degree of tilt of forced signal, and the size of forced signal and driver amplifier and focus driver sensitivity is inversely proportional to, and is inversely proportional to thereby the result who draws is the mistiming of detection and the size of driver amplifier and focus driver sensitivity.
Therefore, the minimum mistiming T of detection J=1.5T DVD=0.75T CD, thereby the error of the sensitivity of driver amplifier and focus driver must be in-2 5% to+50%, promptly-and 2.5dB is to+3.5dB.
But the error of driver amplifier and focus driver sensitivity is introduced to specifications, is respectively more than the positive and negative 2.5dB, then is more than the positive and negative 5dB altogether, so can not identification all satisfy the CD/DVD of all deviations.
Therefore, the influence error of driver amplifier and focus driver-when 2.5dB is following, will be the DVD wrong identification CD ,+when 3.5dB is above, will be the CD wrong identification DVD.Thereby must force CD to replace to DVD, DVD is forced to replace to CD respectively, force to be discerned, so problem has just taken place.
Its problem comprises:
The one, when the identification CD, identification error takes place just require to force to discern again CD/DVD, thereby the time of identification will extend to 2 times;
The 2nd, want to start the CD servomechanism, or when wanting to start the DVD servomechanism with CD laser with DVD laser, focus on and the tracking servo device instability that will become, focus on inconsistent or follow the tracks of discontinuous situation and will take place in succession.In this case, the non-steady state of focus driver causes heat of high temperature to take place, and brings very big negative effect for the soaking etc. of bare headed coating, thereby will shorten service life of a machine.
As mentioned above, at present CD read/register system discerns CD more accurately and quickly and DVD is most important, therefore to the research of this respect further deeply among.
(3) summary of the invention
The present invention proposes for addressing the above problem, and purpose is to provide a kind of CD to read/optical disc discriminating method in the register system, is a kind of method that improves optical disk system identification CD/DVD accuracy.
Other purpose of the present invention is to improve the speed of identification CD/DVD.
Another purpose of the present invention is to keep the steady state (SS) of focus driver, prevent to take place because of non-steady state causes heat of high temperature, thereby prolonging CD reads/life-span of register system.
The object of the present invention is achieved like this, and CD of the present invention reads/and optical disc discriminating method in the register system comprises following step:
Check the recognition time upgraded, a certain item in fixed recognition time or the recognition time that upgraded is defined as recognition time;
Send laser, measure laser focusing point moves to cd-rom recording surface from optical disc surface minute, to this minute with above-mentionedly be defined as recognition time with a certain in fixed recognition time or the recognition time that upgraded and compare, discern DVD or CD then;
By above-mentioned identification, if identification is DVD, just read ID, if identification is CD, just read Sub-Q;
If the result who reads failure, after identification error mark (plag) was defined as 1, forcing identification DVD was that CD, CD are DVD, and the above-mentioned process that reads is read repeatedly;
If the result who reads success, retrieval identification error mark, the identification error mark is if not 1 words, finish the preparation read/write down with CD drive, the identification error mark is 1 words, then reduce or increase described this recognition time of recognition time that is defined as, upgraded storage, the preparation that finishes driver then and read/write down.
At this moment, above-mentioned steps is more satisfactory to be, if the original state of the recognition time that upgrades is read into the words of OXFFFF value in advance, then described this recognition time that is defined as recognition time just is defined as fixed recognition time, if in advance the original state of the recognition time that upgrades is read into the value beyond the OXFFFF, then described this recognition time that is defined as recognition time just is defined as the recognition time that upgraded.
And it is more satisfactory that the above-mentioned recognition time that has upgraded is defined as 1.5 times of values of DVD recognition time.
In addition, if described minute lacks than described this recognition time that is defined as recognition time, identification is DVD, and minute is as described Duoed than described this recognition time that is defined as recognition time, and identification is CD.
And the step of above-mentioned end is made of more satisfactory two stages, the one, and after described identification was DVD, if the identification error mark is 1, then the number percent with definition reduced described this recognition time that is defined as recognition time, and is upgraded storage; The 2nd, after described identification was CD, if the identification error mark is 1, then the number percent with definition increased described this recognition time that is defined as recognition time, and is upgraded storage.
And the recognition time of above-mentioned renewal is stored in EEPROM and goes up more satisfactory.
The present invention develops for achieving the above object.CD of the present invention reads/and another feature of the optical disc discriminating method of register system is made up of following step:
Emission DVD laser, and under the effect of focus driver the lifting/lowering shaven head, to when the laser focusing point reaches optical disc surface, when the laser focusing point reaches cd-rom recording surface, end the minute T that is measured and stored, and definite recognition time T J
To be intended to discern CD and DVD when the laser focusing point reaches optical disc surface, reach the recognition time T of cd-rom recording surface to the laser focusing point JBe defined as 1.5 times of values of DVD recognition time;
Check the recognition time T that has upgraded in advance J-newWhether effective;
If check result is invalid, just still determine recognition time T with 1.5 times of values of DVD recognition time J, effectively talk about as if check result, described definite recognition time T JReplace to the recognition time T that has upgraded J-new, i.e. T J=T J-new
By to described minute T and recognition time T JComparison, identification is DVD or CD, if described minute T is less than described recognition time T J, then identification is DVD, if described minute T is greater than described recognition time T J, then identification is CD;
If the result of identification is DVD, adjust the focusing or the tracking servo device that are suitable for DVD,
If the result of above-mentioned identification is DVD, adjust servomechanisms such as the focusing that is suitable for DVD or tracking, start the DVD servo function, ID is read;
Above-mentioned ID success, the retrieval identification error mark of reading;
If the identification error mark that above-mentioned retrieval is come out is not 1 words, finish the preparation that driver reads/write down, if the identification error mark is 1, use fixed number percent minimizing recognition time, upgraded storage with the recognition time that reduces then, and finished the preparation that driver reads/writes down;
If the above-mentioned ID that reads fails, after the identification error mark was defined as 1, forcing identification was CD;
If above-mentioned pressure identification is CD, perhaps by minute T and recognition time T to above-mentioned storage JRelatively identification be CD, open CD laser, adjust CD servomechanisms such as the focusing be suitable for CD and tracking, start servo function, read Sub-Q;
If above-mentioned Sub-Q success, the retrieval identification error mark of reading; If the identification error mark of above-mentioned retrieval is not 1, finish the preparation that driver reads/write down, the identification error mark is 1, use fixed number percent increase recognition time T J, then with the recognition time T that increases J-newUpgraded storage, finished the preparation that driver reads/writes down;
If the above-mentioned Sub-Q that reads fails, after the identification error mark was defined as 1, forcing identification was DVD.
At this moment, if more satisfactory being of above-mentioned inspection step is the prior recognition time T that upgrades J-newOriginal state be read into the OXFFFF value, inspection is invalid, if the prior recognition time T that upgrades J-newOriginal state be read into value beyond the OXFFFF, inspection is effective.
Effect of the present invention:
As discussed above, CD of the present invention reads/and optical disc discriminating method in the register system has following effect.
The first, even if the error range that disengaging driver amplifier and focus driver sensitivity are allowed, native system just can be eliminated identification error from identification for the second time after CD/DVD is once discerned again;
The second, when breaking away from the error range that driver amplifier and focus driver sensitivity allowed, native system can be restricted to the delay number of times of recognition time for the first time, thereby can avoid the delay to recognition time;
The 3rd, it is poor to utilize EEPROM to upgrade the recognition time of CD/DVD automatically, does not need that firmware is tuning just can to shorten the system development time;
The 4th, can utilize CD to read/static memories such as the employed EEPROM of register system, carry out the program design of firmware, do not require additional circuit.
For further specifying above-mentioned purpose of the present invention, design feature and effect, the present invention is described in detail below with reference to accompanying drawing.
(4) description of drawings
Fig. 1 is when lifting after shaven head falls with the DVD that prior art is made, and laser is through the phenomenon synoptic diagram of surface emitting to record surface.
Fig. 2 is the synoptic diagram of shaven head sends during by the surface in Fig. 1 RF horizontal signal and the RF horizontal signal that occurs during by record surface.
Fig. 3 is when lifting after shaven head falls with the CD that prior art is made, and shaven head is through the phenomenon synoptic diagram of surface emitting to record surface.
Fig. 4 is the RF horizontal signal synoptic diagram that sends when shaven head is through surface and record surface in Fig. 3.
Fig. 5 a and Fig. 5 b are the CD that makes with prior art and the process flow diagram of DVD recognition methods.
Fig. 6 a and Fig. 6 b are the process flow diagrams of CD of the present invention and DVD recognition methods.
(5) embodiment
Read/embodiment of optical disc discriminating method in the register system at CD of the present invention, be described in detail as follows with reference to accompanying drawing:
Fig. 6 a and Fig. 6 b are the process flow diagrams of CD of the present invention and DVD recognition methods.At this moment, for the correctness of RF horizontal signal, compare CD laser and will at first use DVD laser.
Therefore S100, as Fig. 6 a and Fig. 6 b, at first opens (emission) DVD laser.
S110 under focus driver is operated in situation without any signal, falls shaven head.
S120 then lifts again.
S130, and, before detecting the surface, allow timer be in holding state, judge whether to carry out the surface and detect, wait until the surface detection in this step always.
S140 then picks up counting if detect the surface.
S150, then, before the detection record face, continuing increases above-mentioned timing, judges whether to carry out record surface and detects, and waits until that in this step record surface detects always.
S160 is if the detection record face then stops timing.
S170, and, the minute T of storage timing, and definite recognition time T J
At this moment, the mistiming from the surface to the record surface of being intended to discern CD and DVD is 2 times, so determine recognition time T with 1.5 times of values of DVD recognition time J
S180 then, accesses the recognition time difference T of prior renewal from EEPROM J-new
S190 checks above-mentioned recognition time T J-newWhether effectively be worth.
S200, that is, EEPROM will store the OXFFFF value under original state, but when this value was read, this value was invalid, so will still determine above-mentioned definite recognition time T J
S210, and when the value that is read was value beyond the OXFFFF, this system's generation identification error was upgraded the CD/DVD recognition time automatically, and the time T of upgrading from above-mentioned EEPROM J-NEWBe updated to recognition time T J
S220, below, to the minute T of above-mentioned storage and the recognition time T that determines or upgrade JCompare (T＜T J).
S230 is if minute T is than the recognition time T that determines or upgrade in advance JFew, identification is DVD.
S320 is if the said determination time T is than the recognition time T that determines or upgrade in advance JMany, identification is CD.
S240 is by minute T and the recognition time T definite or that upgrade to above-mentioned storage JComparison, if identification is DVD, then adjust the servomechanism of the focusing be suitable for DVD or tracking etc.
S250 starts the DVD servo function then.
S260, below, the ID that stores DVD Data Position information is read.Read ID and be because finish, have only focusing and the tracking servo device selecting to be suitable for the DVD CD just might realize the reading of CD.
S270 at this moment, judges and reads (detection) ID success or not.
S290, if above-mentioned judgement read the ID success, will retrieve identification error to mark whether=1.
S300 if the identification error mark of above-mentioned retrieval is 1, determines that recognition time is very long, makes DVD be identified as CD with causing system mistake, is the optical disc recognition error of CD so just took place existing DVD wrong identification in the past.
So, in this case, use fixed number percent reduce recognition time T J
S310 is then with the recognition time T that is upgraded J-NEWBe stored on the EEPROM.
S420 then will finish driver and read/write down preparation, and prepare to accept the order of reading CD of main frame.
And if the above-mentioned identification error mark retrieved is not 1 among the above-mentioned steps S290, disposable identification is DVD, and with this preparation that finishes driver and read/write down, and the order of reading CD of main frame is accepted in preparation in the step S420.
And, if judge among the above-mentioned steps S270 and read the ID failure, the optical disc recognition error, after promptly the error that mistakenly CD is identified as DVD was defined as 1, will arrive and force identification among the step S320 was CD.
S320 then, if force identification CD, perhaps passes through step S220 to the minute T of above-mentioned storage and the recognition time T that determines or upgrade Jrelatively discern CD,
S330 if discerned CD, opens (emission) CD laser.
S340 adjusts the CD servomechanism of the focusing be suitable for CD and tracking etc.
S350 starts the CD servo function.
S360, below, the Sub-Q that stores CD CD position information is read.
Reading Sub-Q is because of the correct identification of finishing CD, has only focusing and the tracking servo device selecting to be suitable for the CD CD just might realize.
S370 at this moment, judges and reads (detection) above-mentioned Sub-Q success or not.
S390, if read above-mentioned Sub-Q success, will retrieve identification error to mark whether=1.
S400 if the identification error mark of above-mentioned steps S390 retrieval is 1, determines that recognition time is very long, causes system mistake ground that DVD is identified as CD, so thought in the past existing DVD mistake is identified as the generation that CD has caused the optical disc recognition error.
So, in this case, use fixed number percent increase recognition time T J
S410 is stored in T to the recognition time that is upgraded then J-NEWOn then will finish driver and read/write down preparation, and prepare to accept the order of reading CD of main frame to step S420.
And if the above-mentioned identification error mark retrieved is not 1 among the above-mentioned steps S390, disposable identification is DVD, with this preparation that finishes driver and read/write down, and accepts the order of reading CD of main frame to step S420 preparation.
S380, then, if judge among the above-mentioned steps S370 read the Sub-Q failure, after the identification error mark was defined as 1, forcing identification in the step S230 was DVD, carried out the work of above-mentioned illustrated identification DVD again.
So, when identification CD and DVD, whenever error takes place, not with the sensitivity difference of driver amplifier and the focus driver ground of having any relation, automatically calculate the recognition time of CD/DVD, and on the static memory of EEPROM etc., upgrade its value, thus the optical disc recognition error problem can not only be improved, and can solve the lost of life problem that in the system that discerns that can only continue to make a mistake, plays pendulum and cause because of focus driver.
Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, and be not to be used as limitation of the invention, as long as in connotation scope of the present invention, all will drop in the scope of claims of the present invention variation, the modification of the above embodiment.

Claims (8)

1, a kind of CD reads/optical disc discriminating method in the register system, it is characterized in that comprising:
Check the recognition time that has upgraded in advance, a certain item in fixed recognition time or the recognition time that upgraded is defined as recognition time;
Send laser, measure laser focusing point moves to cd-rom recording surface from optical disc surface minute, then this minute and above-mentioned this recognition time that a certain item in fixed recognition time or the recognition time that upgraded is defined as recognition time are compared, discern DVD or CD;
By above-mentioned identification, if identification is DVD, just read ID, if identification is CD, just read Sub-Q;
If the result who reads failure, after the identification error mark was defined as 1, DVD forced to be identified as CD, and CD forces to be identified as DVD, and above-mentioned fetch phase is carried out repeatedly;
If the result who reads success, then retrieve the identification error mark, the identification error mark is not 1 words, finish the preparation read/write down with CD drive, the identification error mark is 1 words, then reduce or increase described this recognition time that is defined as recognition time, and upgraded storage, finish the preparation that driver reads/writes down then.
2, CD as claimed in claim 1 reads/optical disc discriminating method in the register system, it is characterized in that:
If the original state of the described recognition time that has upgraded in advance is read into the words of 0XFFFF value, then described this recognition time that is defined as recognition time just is defined as fixed recognition time, if the original state of the described recognition time that has upgraded in advance is read into the value beyond the 0XFFFF, then described this recognition time that is defined as recognition time just is defined as the recognition time that upgraded.
3, CD as claimed in claim 2 reads/optical disc discriminating method in the register system, it is characterized in that:
Described fixed recognition time is defined as 1.5 times of DVD recognition time.
4, CD as claimed in claim 1 reads/optical disc discriminating method in the register system, it is characterized in that:
If described minute lacks than described this recognition time that is defined as recognition time, identification is DVD, and minute is as described Duoed than described this recognition time that is defined as recognition time, and identification is CD.
5, CD as claimed in claim 1 reads/optical disc discriminating method in the register system, it is characterized in that:
After described identification was DVD, if the identification error mark is 1, then the number percent with definition reduced described this recognition time that is defined as recognition time, and is upgraded storage;
After described identification was CD, if the identification error mark is 1, then the number percent with definition increased described this recognition time that is defined as recognition time, and is upgraded storage.
6, CD as claimed in claim 5 reads/optical disc discriminating method in the register system, it is characterized in that:
The recognition time that upgrades is stored on the EEPROM.
7, a kind of CD reads/optical disc discriminating method in the register system, it is characterized in that comprising:
Emission DVD laser, and under the effect of focus driver the lifting/lowering shaven head, to when the laser focusing point reaches optical disc surface, when the laser focusing point reaches cd-rom recording surface, end the minute T that is measured and stored, and definite recognition time T J
To be intended to discern CD and DVD when the laser focusing point reaches optical disc surface, reach the recognition time T of cd-rom recording surface to the laser focusing point JBe defined as 1.5 times of values of DVD recognition time;
Check the recognition time T that has upgraded in advance JWhether-new is effective;
If check result is invalid, just still determine recognition time T with 1.5 times of values of DVD recognition time J, effectively talk about as if check result, described definite recognition time T JReplace to the recognition time T that has upgraded J-new, i.e. T J=T J-new;
By to described minute T and recognition time T JComparison, identification is DVD or CD, if described minute T is less than described recognition time T J, then identification is DVD, if described minute T is greater than described recognition time T J, then identification is CD;
If the result of identification is DVD, adjust the focusing or the tracking servo device that are suitable for DVD, start the DVD servo function, so that ID is read;
Read the ID success, retrieval identification error mark;
If the identification error mark that retrieval is come out is not 1 words, finish the preparation that driver reads/write down, if the identification error mark is 1, use fixed number percent minimizing recognition time, upgraded storage with the recognition time that reduces then, and finished the preparation that driver reads/writes down;
If read the ID failure, after the identification error mark was defined as 1, forcing identification was CD;
If described pressure identification is CD, perhaps by minute T and recognition time T to described storage JComparison, identification is CD, opens CD laser, adjusts the focusing be suitable for CD and follows the tracks of the CD servomechanism, starts servo function, reads Sub-Q;
If described Sub-Q success, the retrieval identification error mark of reading; If the identification error mark of described retrieval is not 1, finish the preparation that driver reads/write down, the identification error mark is 1, use fixed number percent increase recognition time T JThen with the recognition time T that increases J-new is upgraded storage, finishes the preparation that driver reads/writes down;
If the described Sub-Q that reads fails, after the identification error mark was defined as 1, forcing identification was DVD.
8, CD as claimed in claim 7 reads/optical disc discriminating method in the register system, it is characterized in that:
If the original state of the described recognition time that has upgraded in advance is read into the 0XFFFF value, inspection is invalid, if the described recognition time T that has upgraded in advance JThe original state of-new is worth beyond being read into 0XFFFF, and inspection is effective.
CNB200410054099XA 2004-08-30 2004-08-30 Optical disk identifying method in optical disk reading/recording system Expired - Fee Related CN100356453C (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1195857A (en) * 1996-10-24 1998-10-14 三星电子株式会社 Method for discriminating type of disc and digital versatile disc system adopting the same
JP2002183980A (en) * 2001-10-29 2002-06-28 Victor Co Of Japan Ltd Discriminating method for optical recording medium
US20040105370A1 (en) * 2002-11-29 2004-06-03 Jen-Yu Hsu Method for discriminating optical media type

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1195857A (en) * 1996-10-24 1998-10-14 三星电子株式会社 Method for discriminating type of disc and digital versatile disc system adopting the same
JP2002183980A (en) * 2001-10-29 2002-06-28 Victor Co Of Japan Ltd Discriminating method for optical recording medium
US20040105370A1 (en) * 2002-11-29 2004-06-03 Jen-Yu Hsu Method for discriminating optical media type

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