CN1312690C - Method and device for judging type of digital versatile disc - Google Patents
Method and device for judging type of digital versatile disc Download PDFInfo
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- CN1312690C CN1312690C CNB200410088448XA CN200410088448A CN1312690C CN 1312690 C CN1312690 C CN 1312690C CN B200410088448X A CNB200410088448X A CN B200410088448XA CN 200410088448 A CN200410088448 A CN 200410088448A CN 1312690 C CN1312690 C CN 1312690C
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/02—Control of operating function, e.g. switching from recording to reproducing
- G11B19/12—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark
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Abstract
The invention relates to a method and a device for judging the type of a digital multifunctional optical disk, which mainly comprises the following steps: setting relevant parameters, picking up a wobble signal from a digital multifunctional optical disk, and setting a frequency division coefficient to divide the wobble signal by the frequency division coefficient. Then, the time required by the spindle motor of the optical disk drive to rotate the digital multifunctional optical disk for one turn is taken as unit time, and the frequency of the divided wobble signal is calculated. Finally, the type of the DVD is determined according to the frequency of the divided wobble signal, which can avoid the defects of the prior art and improve the correct determination probability.
Description
Technical field
The present invention relates to a kind of method and apparatus of judging the digital versatile disc kind, particularly relate to a kind of digital versatile disc kind determination methods and device of differentiating DVD-ROM, DVD-and DVD+ discs of judging.
Background technology
At present very universal digital versatile disc (digital versatile disc, abbreviate DVD as), (the formula memory body is only read in " ROM " of back representative except being used for the DVD-ROM of the information that reads, read only memory just) in addition, also having can be for the kind of burning information.And can be for the DVD of burning information, because the specification difference is divided into two kinds of DVD-and DVD+ again.Present most DVD CD player all is compatible to multiple different size, therefore judges the CD types that the user puts into, and just becomes an important technology.
The location information that present method is to use default groove swinging signal (pre-groove wobble signal is hereinafter to be referred as swinging signal) to include is judged the DVD kind.According to the specification of DVD, DVD-ROM does not have swinging signal, and DVD-and DVD+ also have swinging signal except general track, and Fig. 1 please be read in its source.When discs is rotated in DVD CD player the inside, read/write head 101 can be along outwards skidding off in track 102, as shown in the figure, this moment, the sensitization diode (photodiode IC) of read/write head 101 was arranged as shown in Figure 1, then A, B, four zones of C, D, can sense the signal of varying strength separately, and swinging signal is to obtain according to following formula:
G×[g
1×(A+D)-g
2×(B+C)]
Wherein, G, g
1With g
2Be all adjustable yield value (gain).
It is to be mixed within the swinging signal that DVD-and DVD+ respectively have a cover locator meams, can obtain the current position information after decipher via logical operation circuit.Fig. 2 is the swinging signal of DVD+, contains a plurality of phase change zones 202 among swinging signal 201, and this swinging signal just can be obtained location information after the logical operation circuit decipher.Swinging signal as for DVD-sees also Fig. 3, contains the default hole (land pre-pit) 302 of a plurality of burrs among swinging signal 301, and in like manner, location information can be via obtaining after the logical circuit decipher.By Fig. 2 and Fig. 3 as can be known, DVD+ is different with the swinging signal of DVD-, and the decipher function of logical operation circuit is also different, therefore can be used to judge the DVD kind.
Seeing also shown in Figure 4ly, is the process flow diagram of the digital versatile disc kind determination methods used at present.At first step 402 can guess that earlier the discs that the user puts into is DVD+, therefore sets the correlation parameter that DVD+ uses, and step 404 can attempt reading the current position information then, if read success, step 406 meeting judges that the kind of discs is DVD+.Otherwise, following step 408 can the conjecture discs be DVD-, and the correlation parameter of setting DVD-use, step 410 can attempt reading the current position information once again then, if success, step 412 can judge that the kind of discs is DVD-, otherwise step 414 can judge that the kind of discs is DVD-ROM.
The shortcoming of this method is the correlation parameter that DVD+ and DVD-use, and must can contain the discs that most discs, particularly burning are crossed information, and top location information quality can variation, often erroneous judgement easily.Therefore, we need a kind of method to solve this problem, to improve the probability of correct judgement digital versatile disc kind.
This shows that above-mentioned existing digital versatile disc kind determination methods and device obviously still have inconvenience and defective, and demand urgently further being improved.In order to solve digital versatile disc kind determination methods and to install the problem that exists, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable design finished by development, and common product does not have appropriate structure to address the above problem, and this obviously is the problem that the anxious desire of relevant dealer solves.
Because existing digital versatile disc kind determination methods and the defective of installing existence, the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge, and the utilization of cooperation scientific principle, actively studied innovation, in the hope of founding a kind of digital versatile disc kind determination methods and device of new structure, can improve general existing digital versatile disc kind determination methods and device, make it have more practicality.Through constantly research, design, and after studying sample and improvement repeatedly, create the present invention who has practical value finally.
Summary of the invention
The objective of the invention is to, overcome the defective that existing digital versatile disc kind determination methods exists, and provide a kind of new digital versatile disc kind determination methods, technical matters to be solved is to make it solve the problem of erroneous judgement easily, thereby be suitable for practicality more, and have the value on the industry.
Another object of the present invention is to, a kind of digital versatile disc kind judgment means is provided, technical matters to be solved is to make its shortcoming that overcomes prior art, improves the correct probability of judging the digital versatile disc kind, thereby is suitable for practicality more.
The object of the invention to solve the technical problems realizes by the following technical solutions.According to a kind of digital versatile disc kind determination methods that the present invention proposes, it comprises the following steps: that (a) captures a swinging signal from a digital versatile disc; And, judge the kind of this digital versatile disc (b) according to the frequency of this swinging signal.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid digital versatile disc kind determination methods, wherein said step (b) more comprises: if the frequency of this swinging signal is less than a first frequency, the kind of then judging this digital versatile disc is one first kind; If the frequency of this swinging signal is positioned at the information transmission multiplying power that a second frequency multiply by the inner ring of this digital versatile disc, and this second frequency multiply by between the information transmission multiplying power of this digital versatile disc outmost turns, and the kind of then judging this digital versatile disc is one second kind; And if the frequency of this swinging signal is positioned at the information transmission multiplying power that one the 3rd frequency multiply by the inner ring of this digital versatile disc, and the 3rd frequency multiply by between the information transmission multiplying power of this digital versatile disc outmost turns, and the kind of then judging this digital versatile disc is the third class.
Aforesaid digital versatile disc kind determination methods, wherein said second frequency is 140.6KHz, and the 3rd frequency is 817.5KHz, and this first kind is DVD-ROM in addition, and this second kind is DVD-, and this third class is DVD+.
Aforesaid digital versatile disc kind determination methods, wherein said step (b) more comprises: driving the one default required time of the number of turns of this digital versatile disc rotation with the Spindle Motor of CD player is the unit interval, calculates the frequency of this swinging signal.
Aforesaid digital versatile disc kind determination methods, wherein said step (b) more comprises: with a divide ratio with this swinging signal frequency division; The frequency of this swinging signal of being calculated of step (b) is the frequency for this swinging signal behind the frequency division in addition.
Aforesaid digital versatile disc kind determination methods, wherein said step (b) more comprises: if the frequency of this swinging signal behind the frequency division is less than this first frequency, the kind of then judging this digital versatile disc is this first kind; If being positioned at the information transmission multiplying power that this second frequency multiply by the inner ring of this digital versatile disc, the frequency of this swinging signal behind the frequency division multiply by this divide ratio, and the information transmission multiplying power that this second frequency multiply by this digital versatile disc outmost turns multiply by between this divide ratio, and the kind of then judging this digital versatile disc is this second kind; And, the frequency of this swinging signal behind the frequency division multiply by this divide ratio if being positioned at the information transmission multiplying power that the 3rd frequency multiply by the inner ring of this digital versatile disc, and the information transmission multiplying power that the 3rd frequency multiply by this digital versatile disc outmost turns multiply by between this divide ratio, and the kind of then judging this digital versatile disc is this third class.
The object of the invention to solve the technical problems also adopts following technical scheme to realize.According to a kind of digital versatile disc kind judgment means that the present invention proposes, it comprises: a capture device, capture a swinging signal from a digital versatile disc, and with this swinging signal digitizing, and export digitized this swinging signal; And a judgment means, be coupled to this capture device, according to the frequency of this swinging signal, judge and export the kind of this digital versatile disc.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid digital versatile disc kind judgment means, it more comprises: a wave filter, be coupled to the input end of this judgment means, receive digitized this swinging signal, the noise of this swinging signal of filtering, and this swinging signal behind the output filtering noise information; One frequency counter is coupled to this wave filter, according to this swinging signal behind the filtering noise information, calculates and export the frequency of this swinging signal; And a determining device, be coupled to this frequency counter, according to the frequency height of this swinging signal, judge and export the kind of this digital versatile disc.
Aforesaid digital versatile disc kind judgment means, wherein said frequency counter also receives an enabling signal, and according to this enabling signal when decision begins to calculate the frequency of this swinging signal, this frequency counter also receives the tach signal that a Spindle Motor of CD player is sent in addition, and according to this tach signal, driving the one default required time of the number of turns of this digital versatile disc rotation with this Spindle Motor is the unit interval, calculates the frequency of this swinging signal.
Aforesaid digital versatile disc kind judgment means, wherein said determining device are frequencies at this swinging signal during less than a first frequency, and the kind of judging this digital versatile disc is one first kind; This determining device is that frequency at this swinging signal is positioned at the information transmission multiplying power that a second frequency multiply by the inner ring of this digital versatile disc in addition, and when this second frequency multiply by between the information transmission multiplying power of this digital versatile disc outmost turns, the kind of judging this digital versatile disc was one second kind; This determining device is that frequency at this swinging signal is positioned at the information transmission multiplying power that one the 3rd frequency multiply by the inner ring of this digital versatile disc in addition, and when the 3rd frequency multiply by between the information transmission multiplying power of this digital versatile disc outmost turns, the kind of judging this digital versatile disc was the third class.
Aforesaid digital versatile disc kind judgment means, wherein said second frequency is 140.6KHz, and the 3rd frequency is 817.5KHz, and this first kind is DVD-ROM in addition, and this second kind is DVD-, and this third class is DVD+.
Aforesaid digital versatile disc kind judgment means, wherein said judgment means more comprises: a frequency divider, be coupled between this wave filter and this frequency counter, receive this swinging signal behind the filtering noise information that this wave filter exports, with this swinging signal frequency division, and this swinging signal behind the output frequency division is to this frequency counter with a divide ratio.
Aforesaid digital versatile disc kind judgment means, wherein said determining device are frequencies at this swinging signal during less than this first frequency, and the kind of judging this digital versatile disc is this first kind; This determining device is that frequency at this swinging signal is positioned at the information transmission multiplying power that this second frequency multiply by the inner ring of this digital versatile disc and multiply by this divide ratio in addition, and when the information transmission multiplying power that this second frequency multiply by this digital versatile disc outmost turns multiply by between this divide ratio, the kind of judging this digital versatile disc was this second kind; This determining device is that frequency at this swinging signal is positioned at the information transmission multiplying power that the 3rd frequency multiply by the inner ring of this digital versatile disc and multiply by this divide ratio in addition, and when the information transmission multiplying power that the 3rd frequency multiply by this digital versatile disc outmost turns multiply by between this divide ratio, the kind of judging this digital versatile disc was this third class.
The present invention compared with prior art has tangible advantage and beneficial effect.By above technical scheme as can be known, in order to reach aforementioned goal of the invention, a preferred embodiment of the present invention proposes a kind of digital versatile disc kind determination methods, its key step comprises: set correlation parameter, capture a swinging signal from a digital versatile disc, and the setting divide ratio, with divide ratio with above-mentioned swinging signal frequency division.Then, driving digital versatile disc with the Spindle Motor of CD player, to revolve the required time of turning around be the unit interval, calculates the swinging signal frequency behind the frequency division.At last, according to the frequency height of the swinging signal behind the frequency division, judge the kind of digital versatile disc.
For reaching above-mentioned and other content, another preferred embodiment of the present invention proposes a kind of digital versatile disc kind judgment means in addition, comprising: a capture device captures a swinging signal from a digital versatile disc, with the swinging signal digitizing, and export digitized swinging signal; And a judgment means, be coupled to above-mentioned capture device, according to the frequency of swinging signal, judge and the kind of output digital versatile disc.Wherein, above-mentioned judgment means more comprises: a wave filter, be coupled to the input end of above-mentioned judgment means, and receive digitized swinging signal, the noise of filtering swinging signal, and the swinging signal behind the output filtering noise information; One frequency counter is coupled to above-mentioned wave filter, according to the swinging signal behind the filtering noise information, calculates and export the frequency of swinging signal; And a determining device, be coupled to above-mentioned frequency counter, according to the frequency height of swinging signal, judge and the kind of output digital versatile disc.
By technique scheme, digital versatile disc kind determination methods of the present invention has following advantage at least with device:
The present invention is the frequency height according to swinging signal, judge the kind of digital versatile disc, but not as being contained in the moving location information of swing news in the prior art basis, therefore can avoid prior art erroneous judgement and the shortcoming that is difficult for providing the information that is suitable for all CD player easily, improve the correct probability of judging the digital versatile disc kind.
In sum, the digital versatile disc kind determination methods and the device of special construction of the present invention, the problem that it has solved easy erroneous judgement has improved the probability of correct judgement digital versatile disc kind.It has above-mentioned many advantages and practical value, and in like product and method, do not see have similar design and method to publish or use and really genus innovation, no matter it all has bigger improvement on product or function, have large improvement technically, and produced handy and practical effect, and more existing digital versatile disc kind determination methods has the multinomial effect of enhancement with device, thereby be suitable for practicality more, and have the extensive value of industry, really be a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of instructions, and for above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, below especially exemplified by going out a plurality of preferred embodiments, and conjunction with figs., be described in detail as follows.
Description of drawings
Fig. 1 is the source synoptic diagram of swinging signal.
Fig. 2 is the swinging signal synoptic diagram of DVD+.
Fig. 3 is the swinging signal synoptic diagram of DVD-.
Fig. 4 is existing digital versatile disc kind determination methods process flow diagram.
Fig. 5 is the swinging signal frequency range of three kinds of digital versatile discs in one embodiment of the invention.
Fig. 6 is the Organization Chart of a certain embodiment of digital versatile disc kind judgment means of the present invention.
Fig. 7 is the process flow diagram of a certain embodiment of digital versatile disc kind determination methods of the present invention.
A, B, C, D: four zones of CD player read/write head
Track on the read/write head 102:DVD discs of 101:DVD CD player
The phase change zone that the swinging signal 202:DVD+ swinging signal of 201:DVD+ includes
The swinging signal of 301:DVD-
The burr that the swinging signal of 302:DVD-includes is preset the hole
402: set the correlation parameter 404 that DVD+ uses: read current position?
406:DVD+ 408: set the correlation parameter that DVD-uses
410: read current position? 412:DVD-
414:DVD-ROM 601: capture device
602: judgment means 603: wave filter
604: frequency divider 605: frequency counter
606: determining device 607: swinging signal
608: enabling signal 609: tach signal
610: disc types signal 702: set correlation parameter
704: acquisition swinging signal 706: setting divide ratio is 1/2
708: frequency division 710: the swinging signal frequency behind the calculating frequency division
712:, judge disc types according to the frequency behind the frequency division
714：DVD-ROM 716：DVD-
718：DVD+
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, to the digital versatile disc kind determination methods and its embodiment of device, structure, method step, feature and effect thereof that foundation the present invention proposes, describe in detail as after.
The present invention utilizes digital versatile disc (digital versatile disc, abbreviate DVD as) swinging signal (wobble signal) frequency, distinguish DVD-ROM (formula memory body, just read only memory are only read in " ROM " of back representative), DVD-, with these three kinds of digital versatile discs of DVD+.Below especially exemplified by embodiment, with the digital versatile disc kind determination methods and the device of explanation the present invention proposition.
Different types of DVD has different swinging signal frequencies, in information transmission multiplying power (datatransfer rate) is under the situation of one times of speed (1349KB/s), revolving the time of turning around with CD player Spindle Motor (spindlemotor) drive discs is the unit interval, then the swinging signal frequency of DVD+ is 817.5KHz, the swinging signal frequency of DVD-is 140.6KHz, and DVD-ROM there is no any hunting frequency and is recorded on the video disc, so frequency is zero.Difference on this frequency, basis for estimation of the present invention just.
In devices such as CD player, actual frequency computation part is comparatively complicated, because CD player adopts fixed angles speed (constant angular velocity mostly, abbreviate CAV as) pattern, therefore the inner ring of discs is obviously different with the information transmission multiplying power of outmost turns, that is to say that the swinging signal frequency of DVD-and DVD+ can be a scope, but not single numeral.Among the logical circuit of this external analysis swinging signal, may have one " frequency division " action, be exactly with a fixing divide ratio, reduces the frequency of swinging signal, if divide ratio 1/2 for example, then the swinging signal frequency behind the frequency division is exactly original 1/2.Apparently, the swinging signal frequency that reads at the inner ring of DVD+ should be:
817.5KHz * inner ring information transmission multiplying power * divide ratio
The swinging signal frequency that reads in the DVD+ outmost turns should be:
817.5KHz * outmost turns information transmission multiplying power * divide ratio
In like manner, the swinging signal frequency that reads at the inner ring of DVD-should be:
140.6KHz * inner ring information transmission multiplying power * divide ratio
The swinging signal frequency that reads in the DVD-outmost turns should be:
140.6KHz * outmost turns information transmission multiplying power * divide ratio
In the present embodiment, CD player is the CAV pattern rotation with four times of speed, and the information transmission multiplying power of therefore inner ring is approximately 2 times, and the information transmission multiplying power of outmost turns is approximately 4 times, and divide ratio is 1/2.Through learning that the swinging signal frequency range of DVD+ is 800KHz～1.6MHz after simple the calculating, the swinging signal frequency range of DVD-is 140KHz～280KHz, and DVD-ROM is 0, as shown in Figure 5.In fact, DVD-ROM may small swinging signal frequency occur because of the error of true environment, and this can not influence judgement of the present invention.
Seeing also shown in Figure 5ly, is the swinging signal frequency range of three kinds of digital versatile discs in one embodiment of the invention.Under the prerequisite of fixed rotating speed, the frequency range of these three kinds of discs and zero lap, and also it is very far away to be separated by, and therefore need not worry that the diverse location on video disc reads different hunting frequencies and causes erroneous judgement.
See also Fig. 6 and shown in Figure 7, Fig. 6 is the Organization Chart of a certain embodiment of digital versatile disc kind judgment means of the present invention, and Fig. 7 is the process flow diagram of a certain embodiment of digital versatile disc kind determination methods of the present invention.Present embodiment has comprised the frequency division action, and all correlated digital and details are all listed frequency division in consideration, and in fact this action can be omitted.If frequency division not, the swinging signal frequency range of Fig. 5 must be removed the influence of divide ratio, among the device architecture figure (Fig. 6) below, must remove the related elements of frequency division, in the method flow diagram below (Fig. 7), also must remove the correlation step of frequency division.
See also shown in Figure 6ly, capture device 601 can after swinging signal 607 digitizings, export judgment means 602 to from digital versatile disc acquisition swinging signal 607.Judgment means 602 can be judged the kind of digital versatile disc according to the frequency of swinging signal 607, and the kind signal 610 of output CD.
Several elements have been comprised in the middle of the judgment means 602, at first, wave filter 603 can receive digitized swinging signal 607, after the noise of filtering swinging signal, swinging signal behind the output filtering noise information (when noise not quite or not can cause difficult judgment, can dispense wave filter 603 for frequency divider 604 certainly.Frequency divider 604 can be with default divide ratio (is 1/2 at present embodiment) with the swinging signal frequency division, and the swinging signal behind the output frequency division is given frequency counter 605.
And then, the tach signal 609 that the Spindle Motor (not shown) of frequency counter 605 meeting reception CD player is sent, and according to tach signal 609, revolving the required time of turning around with Spindle Motor drive digital versatile disc is the unit interval, swinging signal frequency behind the calculating frequency division exports this frequency to determining device 606.As for the effect of enabling signal 608, be when notice frequency counter 605 begins calculated rate.At last, determining device 606 can be according to the frequency height of frequency counter 605 outputs, and the various discs frequency ranges that illustrate of Fig. 5, judges the kind of digital versatile disc, and output disc types signal 610.
See also shown in Figure 7ly, at first, step 702 can be set correlation parameter, and step 704 can be from digital versatile disc acquisition swinging signal.Step 706 can be set divide ratio then, and (can be set at 1/2 in for example above-mentioned example), step 708 is used divide ratio with the swinging signal frequency division.Next, it is the unit interval that step 710 can be revolved the required time of turning around with the Spindle Motor drive digital versatile disc of CD player, the swinging signal frequency behind the calculating frequency division.
Calculate after the frequency, step 712 can be judged the kind of discs according to the swinging signal frequency behind the frequency division.If frequency is zero, step 714 can judge that the kind of digital versatile disc is DVD-ROM.If frequency is between 140KHz and 280KHz, step 716 can judge that the kind of digital versatile disc is DVD-.If frequency is between 800KHz and 1.6MHz, step 718 can judge that the kind of digital versatile disc is DVD+.
At this, be DVD+ or DVD-at the multifunctional light disc, divide ratio commonly used is 2/23 or 1/2.That is after using certain divide ratio,, just can use another kind of divide ratio to calculate if fail to judge smoothly the content of multifunctional light disc.
By above explanation as can be known, the present invention is the frequency height according to swinging signal, judge the kind of digital versatile disc, but not as being contained in the moving location information of swing news in the prior art basis, therefore can avoid the prior art shortcoming of erroneous judgement easily, improve the correct probability of judging the digital versatile disc kind.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the method that can utilize above-mentioned announcement and technology contents are made a little change or be modified to the equivalent embodiment of equivalent variations, but every content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (11)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2004/001409 WO2005117008A1 (en) | 2004-05-25 | 2004-12-03 | Method and apparatus for type determination of digital versatile discs |
| RU2006141413/28A RU2006141413A (en) | 2004-05-25 | 2004-12-03 | METHOD AND APPARATUS FOR DETERMINING TYPE OF DIGITAL MULTIFUNCTIONAL DISC |
| BRPI0418819-5A BRPI0418819A (en) | 2004-05-25 | 2004-12-03 | Method and apparatus for determining the type of a versatile digital disc |
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|---|---|---|---|
| US57466504P | 2004-05-25 | 2004-05-25 | |
| US60/574,665 | 2004-05-25 |
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| CN1601639A CN1601639A (en) | 2005-03-30 |
| CN1312690C true CN1312690C (en) | 2007-04-25 |
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| CNB200410088448XA Expired - Lifetime CN1312690C (en) | 2004-05-25 | 2004-10-29 | Method and device for judging type of digital versatile disc |
| CNB200410061584XA Expired - Lifetime CN1324597C (en) | 2004-05-25 | 2004-12-27 | How to judge the type of digital versatile disc |
| CNB2005100719792A Active CN100367367C (en) | 2004-05-25 | 2005-05-25 | Method for judging the type of digital versatile disc |
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| CNB2005100719792A Active CN100367367C (en) | 2004-05-25 | 2005-05-25 | Method for judging the type of digital versatile disc |
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| BR (1) | BRPI0418821A (en) |
| RU (2) | RU2006141413A (en) |
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| WO (1) | WO2005117009A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI298156B (en) | 2002-10-24 | 2008-06-21 | Tian Holdings Llc | Discrimination method for light storage device |
| US7602684B2 (en) | 2003-09-15 | 2009-10-13 | Chun-Ta Chen | Discriminating method of an optical disc device for ascertaining the format of a loaded optical disc |
| US20050226114A1 (en) | 2004-03-31 | 2005-10-13 | Stanley Liow | Method and apparatus for generating absolute time in pregroove data |
| US7626907B2 (en) | 2004-05-25 | 2009-12-01 | Ricky Chang | Method and apparatus for determining type of digital versatile disc |
| US7746745B2 (en) | 2004-05-25 | 2010-06-29 | Ricky Chang | Method for determining the type of digital versatile disc |
| US7570561B2 (en) | 2004-05-25 | 2009-08-04 | Bryan Tai | Method for determining type of digital versatile discs |
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| JP4067781B2 (en) * | 2001-04-13 | 2008-03-26 | 株式会社日立エルジーデータストレージ | Disc player |
| JP3981559B2 (en) * | 2002-01-24 | 2007-09-26 | 株式会社日立エルジーデータストレージ | Optical disc apparatus and disc discrimination method thereof |
| CN100337280C (en) * | 2004-02-17 | 2007-09-12 | 联发科技股份有限公司 | How to Identify the Format of a Disc |
-
2004
- 2004-09-15 TW TW093127819A patent/TWI340964B/en not_active IP Right Cessation
- 2004-10-06 TW TW93130202A patent/TWI307494B/en active
- 2004-10-29 CN CNB200410088448XA patent/CN1312690C/en not_active Expired - Lifetime
- 2004-12-03 RU RU2006141413/28A patent/RU2006141413A/en not_active Application Discontinuation
- 2004-12-08 TW TW93137921A patent/TWI253060B/en not_active IP Right Cessation
- 2004-12-27 RU RU2006140292/28A patent/RU2006140292A/en not_active Application Discontinuation
- 2004-12-27 WO PCT/CN2004/001531 patent/WO2005117009A1/en active Application Filing
- 2004-12-27 BR BRPI0418821-7A patent/BRPI0418821A/en not_active IP Right Cessation
- 2004-12-27 CN CNB200410061584XA patent/CN1324597C/en not_active Expired - Lifetime
-
2005
- 2005-05-25 CN CNB2005100719792A patent/CN100367367C/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000322742A (en) * | 1999-05-10 | 2000-11-24 | Matsushita Electric Ind Co Ltd | Optical disk device |
| CN1348181A (en) * | 2000-09-22 | 2002-05-08 | 索尼公司 | CD driver and mehtod for distinguishing the CD mounted on the same |
| JP2003078392A (en) * | 2001-09-04 | 2003-03-14 | Sony Corp | Automatic follow-up type band-pass filter and optical disk reproducing device |
| CN1490790A (en) * | 2002-09-17 | 2004-04-21 | ������������ʽ���� | Determing method for disk type and disk device |
Also Published As
| Publication number | Publication date |
|---|---|
| BRPI0418821A (en) | 2007-11-13 |
| TWI253060B (en) | 2006-04-11 |
| WO2005117009A1 (en) | 2005-12-08 |
| TW200539114A (en) | 2005-12-01 |
| CN1700311A (en) | 2005-11-23 |
| CN1637909A (en) | 2005-07-13 |
| RU2006140292A (en) | 2008-06-27 |
| CN100367367C (en) | 2008-02-06 |
| TW200539116A (en) | 2005-12-01 |
| TWI340964B (en) | 2011-04-21 |
| RU2006141413A (en) | 2008-06-27 |
| TW200539115A (en) | 2005-12-01 |
| CN1601639A (en) | 2005-03-30 |
| CN1324597C (en) | 2007-07-04 |
| TWI307494B (en) | 2009-03-11 |
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