CN1601639A - Sorts recognition method and device for digital multifunctional optical discs - Google Patents
Sorts recognition method and device for digital multifunctional optical discs Download PDFInfo
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- CN1601639A CN1601639A CN 200410088448 CN200410088448A CN1601639A CN 1601639 A CN1601639 A CN 1601639A CN 200410088448 CN200410088448 CN 200410088448 CN 200410088448 A CN200410088448 A CN 200410088448A CN 1601639 A CN1601639 A CN 1601639A
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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 present invention relates to a method of judging the type of digital versatile disc and a device. The method includes the steps: setting relative parameters, and obtaining a wobble signal from the digital versatile disc, setting frequency removing factor, and removing frequency for the wobble signal by the frequency removing factor; then, calculating the frequency of the wobble signal after frequency removing taking the time that the main shaft motor of a disc player drives the digital versatile disc rotate for one circle as the unit time; and last, judging the type of the digital versatile disc based on the frequency of the wobble signal after frequency removing, thereby can avoid the former fault and improving the correct judging probability.
Description
Technical field
The present invention relates to a kind of method and apparatus of judging numerical digit multifunctional light dish kind, particularly relate to a kind of numerical digit multi-functional laser disc kind determination methods and device of differentiating DVD-ROM, DVD-and DVD+ CD-RW discsCD-RW of judging.
Background technology
At present the very universal multi-functional laser disc of numerical digit (digital versatiledisc, abbreviate DVD as), except can only be used for the data that reads DVD-ROM (formula memory body, just readonlymemory are only read in " ROM " of back representative) in addition, also having can be for the kind of burning data.And can be for the DVD of burning data, because the specification difference is divided into two kinds of DVD-and DVD+ again.Present most DVD CD-ROM device all is compatible to multiple different size, therefore judges the CD-RW discsCD-RW kind that the user puts into, and just becomes an important technology.
The location information that present method is to use default groove swing signal (pre-groovewobblesignal is hereinafter to be referred as the swing signal) to include is judged the DVD kind.According to the specification of DVD, DVD-ROM does not swing signal, and DVD-and DVD+ also have the swing signal except general track, and Fig. 1 please be read in its source.When CD-RW discsCD-RW is rotated in DVD CD-ROM device 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 (photodiodeIC) 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 the swing 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 swing 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 swing signal of DVD+, contains a plurality of phase change zones 202 among swing signal 201, and this swing signal just can be obtained location information after the logical operation circuit decipher.Swing signal as for DVD-sees also Fig. 3, contains the default hole (landpre-pit) 302 of a plurality of burrs among swing 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 swing 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 multi-functional laser disc kind of the numerical digit determination methods used at present.At first step 402 can guess that earlier the CD-RW discsCD-RW 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 CD-RW discsCD-RW is DVD+.Otherwise, following step 408 can the conjecture CD-RW discsCD-RW 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 CD-RW discsCD-RW is DVD-, otherwise step 414 can judge that the kind of CD-RW discsCD-RW is DVD-ROM.
The shortcoming of this method is the correlation parameter that DVD+ and DVD-use, and must can contain the CD-RW discsCD-RW that most CD-RW discsCD-RW, particularly burning are crossed data, 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 numerical digit multifunctional light dish kind.
This shows that above-mentioned existing numerical digit multi-functional laser disc kind determination methods and device obviously still have inconvenience and defective, and demand urgently further being improved.In order to solve the multi-functional laser disc kind of numerical digit 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 the multi-functional laser disc kind of existing numerical digit 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 the numerical digit of founding a kind of new structure multi-functional laser disc kind determination methods and device, can improve general existing numerical digit multi-functional laser 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 the multi-functional laser disc kind of existing numerical digit determination methods exists, and provide the multi-functional laser disc kind of a kind of new numerical digit 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, the multi-functional laser disc kind of a kind of numerical digit judgment means is provided, technical matters to be solved is to make its shortcoming that overcomes prior art, improves the correct probability of judging numerical digit multifunctional light dish 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 the multi-functional laser disc kind of a kind of numerical digit determination methods that the present invention proposes, it comprises the following steps: that (a) is from the multi-functional laser disc acquisition one swing signal of a numerical digit; And, judge the kind of the multi-functional laser disc of this numerical digit (b) according to the frequency of this swing signal.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
The multi-functional laser disc kind of aforesaid numerical digit determination methods, wherein said step (b) more comprises: if the frequency of this swing signal is less than a first frequency, the kind of then judging the multi-functional laser disc of this numerical digit is one first kind; If the frequency of this swing signal is positioned at the data that a second frequency multiply by the inner ring of the multi-functional laser disc of this numerical digit and transmits multiplying power, and this second frequency multiply by between the data transmission multiplying power of the multi-functional laser disc outmost turns of this numerical digit, and the kind of then judging the multi-functional laser disc of this numerical digit is one second kind; And, the frequency of this swing signal transmits multiplying power if being positioned at the data that one the 3rd frequency multiply by the inner ring of the multi-functional laser disc of this numerical digit, and the 3rd frequency multiply by between the data transmission multiplying power of the multi-functional laser disc outmost turns of this numerical digit, and the kind of then judging the multi-functional laser disc of this numerical digit is the third class.
The multi-functional laser disc kind of aforesaid numerical digit 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+.
The multi-functional laser disc kind of aforesaid numerical digit determination methods, wherein said step (b) more comprises: driving the multi-functional one default required time of the number of turns of laser disc rotation of this numerical digit with the Spindle Motor of CD-ROM device is the unit interval, calculates the frequency of this swing signal.
The multi-functional laser disc kind of aforesaid numerical digit determination methods, wherein said step (b) more comprises: should swing the signal frequency elimination with a frequency elimination factor; The frequency of this swing signal of being calculated of step (b) is the frequency for this swing signal behind the frequency elimination in addition.
The multi-functional laser disc kind of aforesaid numerical digit determination methods, wherein said step (b) more comprises: if the frequency of this swing signal behind the frequency elimination judges then that less than this first frequency the kind of the multi-functional laser disc of this numerical digit is this first kind; If the frequency of this swing signal behind the frequency elimination is positioned at data that this second frequency multiply by the inner ring of the multi-functional laser disc of this numerical digit and transmits multiplying power and multiply by this frequency elimination factor, and the data transmission multiplying power that this second frequency multiply by the multi-functional laser disc outmost turns of this numerical digit multiply by between this frequency elimination factor, judges that then the kind of the multi-functional laser disc of this numerical digit is this second kind; And transmit multiplying power and multiply by this frequency elimination factor if the frequency of this swing signal behind the frequency elimination is positioned at data that the 3rd frequency multiply by the inner ring of the multi-functional laser disc of this numerical digit, and the data transmission multiplying power that the 3rd frequency multiply by the multi-functional laser disc outmost turns of this numerical digit multiply by between this frequency elimination factor, judges that then the kind of the multi-functional laser disc of this numerical digit is this third class.
The object of the invention to solve the technical problems also adopts following technical scheme to realize.According to the multi-functional laser disc kind of a kind of numerical digit judgment means that the present invention proposes, it comprises: a capture device, from the multi-functional laser disc acquisition one swing signal of a numerical digit, should swing the signal digitisation, and this swing signal of output digitization; And a judgment means, be coupled to this capture device, according to the frequency of this swing signal, judge and export the kind of the multi-functional laser disc of this numerical digit.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
The multi-functional laser disc kind of aforesaid numerical digit judgment means, it more comprises: a wave filter, be coupled to the input end of this judgment means, receive this swing signal of digitisation, the noise that filtering should the swing signal, and this swing signal behind the output filtering noise information; One frequency counter is coupled to this wave filter, according to this swing signal behind the filtering noise information, calculates and export the frequency of this swing signal; And a determining device, be coupled to this frequency counter, according to the frequency height of this swing signal, judge and export the kind of the multi-functional laser disc of this numerical digit.
The multi-functional laser disc kind of aforesaid numerical digit judgment means, wherein said frequency counter also receives one and starts signal, and according to the frequency of this swing signal of this startup signal decision when beginning to calculate, this frequency counter also receives the rotary speed signal that a Spindle Motor of CD-ROM device is sent in addition, and according to this rotary speed signal, driving the multi-functional one default required time of the number of turns of laser disc rotation of this numerical digit with this Spindle Motor is the unit interval, calculates the frequency of this swing signal.
The multi-functional laser disc kind of aforesaid numerical digit judgment means, wherein said determining device are frequencies at this swing signal during less than a first frequency, and the kind of judging the multi-functional laser disc of this numerical digit is one first kind; This determining device is that frequency at this swing signal is positioned at the data transmission multiplying power that a second frequency multiply by the inner ring of the multi-functional laser disc of this numerical digit in addition, and when this second frequency multiply by between the data transmission multiplying power of the multi-functional laser disc outmost turns of this numerical digit, the kind of judging the multi-functional laser disc of this numerical digit was one second kind; This determining device is that frequency at this swing signal is positioned at the data transmission multiplying power that one the 3rd frequency multiply by the inner ring of the multi-functional laser disc of this numerical digit in addition, and when the 3rd frequency multiply by between the data transmission multiplying power of the multi-functional laser disc outmost turns of this numerical digit, the kind of judging the multi-functional laser disc of this numerical digit was the third class.
The multi-functional laser disc kind of aforesaid numerical digit 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+.
The multi-functional laser disc kind of aforesaid numerical digit judgment means, wherein said judgment means more comprises: a frequency eliminator, be coupled between this wave filter and this frequency counter, receive this swing signal behind the filtering noise information that this wave filter exports, should swing the signal frequency elimination with a frequency elimination factor, and this swing signal behind the output frequency elimination is to this frequency counter.
The multi-functional laser disc kind of aforesaid numerical digit judgment means, wherein said determining device are frequencies at this swing signal during less than this first frequency, judge that the kind of the multi-functional laser disc of this numerical digit is this first kind; This determining device is that frequency at this swing signal is positioned at the data transmission multiplying power that this second frequency multiply by the inner ring of the multi-functional laser disc of this numerical digit and multiply by this frequency elimination factor in addition, and when the data transmission multiplying power that this second frequency multiply by the multi-functional laser disc outmost turns of this numerical digit multiply by between this frequency elimination factor, judge that the kind of the multi-functional laser disc of this numerical digit is this second kind; This determining device is that frequency at this swing signal is positioned at the data transmission multiplying power that the 3rd frequency multiply by the inner ring of the multi-functional laser disc of this numerical digit and multiply by this frequency elimination factor in addition, and when the data transmission multiplying power that the 3rd frequency multiply by the multi-functional laser disc outmost turns of this numerical digit multiply by between this frequency elimination factor, judge that the kind of the multi-functional laser disc of this numerical digit is 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 the multi-functional laser disc kind of a kind of numerical digit determination methods, its key step comprises: set correlation parameter, from the multi-functional laser disc acquisition one swing signal of a numerical digit, and set the frequency elimination factor, with the frequency elimination factor with above-mentioned swing signal frequency elimination.Then, enclosing the required time with the multi-functional laser disc rotation one of the Spindle Motor drive numerical digit of CD-ROM device is the unit interval, the swing signal frequency behind the calculating frequency elimination.At last, according to the frequency height of the swing signal behind the frequency elimination, judge the kind of numerical digit multifunctional light dish.
For reaching above-mentioned and other content, another preferred embodiment of the present invention proposes the multi-functional laser disc kind of a kind of numerical digit judgment means in addition, comprising: a capture device, from the multi-functional laser disc acquisition one swing signal of a numerical digit, to swing the signal digitisation, and the swing signal of output digitization; And a judgment means, be coupled to above-mentioned capture device, according to the frequency of swing signal, judge and the kind of the multi-functional laser disc of output digit.Wherein, above-mentioned judgment means more comprises: a wave filter, be coupled to the input end of above-mentioned judgment means, and receive the swing signal of digitisation, the noise of filtering swing signal, and the swing signal behind the output filtering noise information; One frequency counter is coupled to above-mentioned wave filter, according to the swing signal behind the filtering noise information, calculates and export the frequency of swing signal; And a determining device, be coupled to above-mentioned frequency counter, according to the frequency height of swing signal, judge and the kind of the multi-functional laser disc of output digit.
By technique scheme, the multi-functional laser disc kind of numerical digit of the present invention determination methods has following advantage at least with device:
The present invention is the frequency height according to the swing signal, judge the kind of numerical digit multifunctional light dish, 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-ROM device easily, improve the correct probability of judging numerical digit multifunctional light dish kind.
In sum, the numerical digit of special construction of the present invention multi-functional laser disc kind determination methods and device, the problem that it has solved easy erroneous judgement has improved the probability of correct judgement numerical digit multifunctional light dish 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 the multi-functional laser disc kind of more existing numerical digit 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 swing signal.
Fig. 2 is the swing signal synoptic diagram of DVD+.
Fig. 3 is the swing signal synoptic diagram of DVD-.
Fig. 4 is the multi-functional laser disc kind of an existing numerical digit determination methods process flow diagram.
Fig. 5 is the swing signal frequency range of three kinds of multi-functional laser discs of numerical digit in one embodiment of the invention.
Fig. 6 is the Organization Chart of a certain embodiment of the multi-functional laser disc kind of numerical digit of the present invention judgment means.
Fig. 7 is the process flow diagram of a certain embodiment of the multi-functional laser disc kind of numerical digit of the present invention determination methods.
A, B, C, D: four zones of CD-ROM device read/write head
Track on the read/write head 102:DVD CD-RW discsCD-RW of 101:DVD CD-ROM device
The phase change zone that the swing signal 202:DVD+ swing signal of 201:DVD+ includes
The swing signal of 301:DVD-
The burr that the swing 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 eliminator 605: frequency counter
606: determining device 607: the swing signal
608: start signal 609: rotary speed signal
610: laser disc kind signal 702: set correlation parameter
704: acquisition swing signal 706: setting the frequency elimination factor is 1/2
708: frequency elimination 710: the swing signal frequency behind the calculating frequency elimination
712:, judge the laser disc kind according to the frequency behind the frequency elimination
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 multi-functional laser disc kind of the numerical digit 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 the multi-functional laser disc of numerical digit (digital versatiledisc, abbreviate DVD as) swing signal (wobblesignal) frequency, distinguish DVD-ROM (formula memory body, just readonlymemory are only read in " ROM " of back representative), DVD-, with these three kinds of multi-functional laser discs of numerical digit of DVD+.Below especially exemplified by embodiment, with the numerical digit multi-functional laser disc kind determination methods and the device of explanation the present invention proposition.
Different types of DVD has different swing signal frequencies, in data transmission multiplying power (datatransferrate) is under the situation of one times of speed (1349KB/s), revolving the time of turning around with CD-ROM device Spindle Motor (spindlemotor) drive CD-RW discsCD-RW is the unit interval, then the swing signal frequency of DVD+ is 817.5KHz, the swing signal frequency of DVD-is 140.6KHz, 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-ROM device, actual frequency computation part is comparatively complicated, because CD-ROM device adopts fixed angles speed (constantangularvelocity mostly, abbreviate CAV as) pattern, therefore to transmit multiplying power obviously different for the inner ring of CD-RW discsCD-RW and the data of outmost turns, that is to say that the swing signal frequency of DVD-and DVD+ can be a scope, but not single numeral.Among the logical circuit of this external analysis swing signal, may have one " frequency elimination " action, be exactly with a fixing frequency elimination factor, reduces the frequency of swing signal, if the frequency elimination factor 1/2 for example, then the swing signal frequency behind the frequency elimination is exactly original 1/2.Apparently, the swing signal frequency that reads at the inner ring of DVD+ should be:
817.5KHz * inner ring data transmission multiplying power * frequency elimination factor
The swing signal frequency that reads in the DVD+ outmost turns should be:
817.5KHz * outmost turns data transmission multiplying power * frequency elimination factor
In like manner, the swing signal frequency that reads at the inner ring of DVD-should be:
140.6KHz * inner ring data transmission multiplying power * frequency elimination factor
The swing signal frequency that reads in the DVD-outmost turns should be:
140.6KHz * outmost turns data transmission multiplying power * frequency elimination factor
In the present embodiment, CD-ROM device is the CAV pattern rotation with four times of speed, and the data transmission multiplying power of therefore inner ring is approximately 2 times, and the data transmission multiplying power of outmost turns is approximately 4 times, and the frequency elimination factor is 1/2.Through learning that the swing signal frequency range of DVD+ is 800KHz～1.6MHz after simple the calculating, the swing signal frequency range of DVD-is 140KHz～280KHz, and DVD-ROM is 0, as shown in Figure 5.In fact, DVD-ROM may small swing 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 swing signal frequency range of three kinds of multi-functional laser discs of numerical digit in one embodiment of the invention.Under the prerequisite of fixed rotating speed, the frequency range of these three kinds of CD-RW discsCD-RW 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 the multi-functional laser disc kind of numerical digit of the present invention judgment means, and Fig. 7 is the process flow diagram of a certain embodiment of the multi-functional laser disc kind of numerical digit of the present invention determination methods.Present embodiment has comprised the frequency elimination action, and all correlated digital and details are all listed frequency elimination in consideration, and in fact this action can be omitted.If frequency elimination not, the swing signal frequency range of Fig. 5 must be removed the influence of the frequency elimination factor, among the device architecture figure (Fig. 6) below, must remove the related elements of frequency elimination, in the method flow diagram below (Fig. 7), also must remove the correlation step of frequency elimination.
See also shown in Figure 6ly, capture device 601 can will be swung after signal 607 digitisations from the multi-functional laser disc acquisition of numerical digit swing signal 607, export judgment means 602 to.Judgment means 602 can be judged the kind of numerical digit multifunctional light dish according to the frequency of swing signal 607, and the kind signal 610 of output laser disc.
Several elements have been comprised in the middle of the judgment means 602, at first, wave filter 603 can receive the swing signal 607 of digitisation, after the noise of filtering swing signal, swing signal behind the output filtering noise information (when noise not quite or not can cause difficult judgment, can dispense wave filter 603 for frequency eliminator 604 certainly.Frequency eliminator 604 can will be swung the signal frequency elimination with the default frequency elimination factor (is 1/2 at present embodiment), and the swing signal behind the output frequency elimination is given frequency counter 605.
And then, the rotary speed signal 609 that the Spindle Motor (not shown) of frequency counter 605 meeting reception CD-ROM device is sent, and according to rotary speed signal 609, driving the multi-functional one required time of circle of laser disc rotation of numerical digit with Spindle Motor is the unit interval, swing signal frequency behind the calculating frequency elimination exports this frequency to determining device 606.As for the effect that starts 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 CD-RW discsCD-RW frequency ranges that illustrate of Fig. 5, judges the kind of numerical digit multifunctional light dish, and output laser disc kind signal 610.
See also shown in Figure 7ly, at first, step 702 can be set correlation parameter, and step 704 can be from the multi-functional laser disc acquisition of numerical digit swing signal.Step 706 can be set the frequency elimination factor then, and (can be set at 1/2 in for example above-mentioned example), step 708 is used the frequency elimination factor will swing the signal frequency elimination.Next, it is the unit interval that step 710 can drive the multi-functional one required time of circle of laser disc rotation of numerical digit with the Spindle Motor of CD-ROM device, the swing signal frequency behind the calculating frequency elimination.
Calculate after the frequency, step 712 can be judged the kind of CD-RW discsCD-RW according to the swing signal frequency behind the frequency elimination.If frequency is zero, step 714 can judge that the kind of numerical digit multifunctional light dish is DVD-ROM.If frequency is between 140KHz and 280KHz, step 716 can judge that the kind of numerical digit multifunctional light dish is DVD-.If frequency is between 800KHz and 1.6MHz, step 718 can judge that the kind of numerical digit multifunctional light dish is DVD+.
At this, be DVD+ or DVD-at the multifunctional light video disc, the frequency elimination factor commonly used is 2/23 or 1/2.That is after using certain frequency elimination factor,, just can use the another kind of frequency elimination factor to calculate if fail to judge smoothly the content of multifunctional light video disc.
By above explanation as can be known, the present invention is the frequency height according to the swing signal, judge the kind of numerical digit multifunctional light dish, 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 numerical digit multifunctional light dish 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 (13)
1, the multi-functional laser disc kind of a kind of numerical digit determination methods is characterized in that it comprises the following steps:
(a) from the multi-functional laser disc acquisition one swing signal of a numerical digit; And
(b), judge the kind of the multi-functional laser disc of this numerical digit according to the frequency of this swing signal.
2, the multi-functional laser disc kind of numerical digit according to claim 1 determination methods is characterized in that wherein step (b) more comprises:
If the frequency of this swing signal is less than a first frequency, the kind of then judging the multi-functional laser disc of this numerical digit is one first kind;
If the frequency of this swing signal is positioned at the data that a second frequency multiply by the inner ring of the multi-functional laser disc of this numerical digit and transmits multiplying power, and this second frequency multiply by between the data transmission multiplying power of the multi-functional laser disc outmost turns of this numerical digit, and the kind of then judging the multi-functional laser disc of this numerical digit is one second kind; And
If the frequency of this swing signal is positioned at the data that one the 3rd frequency multiply by the inner ring of the multi-functional laser disc of this numerical digit and transmits multiplying power, and the 3rd frequency multiply by between the data transmission multiplying power of the multi-functional laser disc outmost turns of this numerical digit, and the kind of then judging the multi-functional laser disc of this numerical digit is the third class.
3, the multi-functional laser disc kind of numerical digit according to claim 2 determination methods, it is characterized in that wherein said second frequency is 140.6KHz, the 3rd frequency is 817.5KHz, and this first kind is DVD-ROM in addition, this second kind is DVD-, and this third class is DVD+.
4, the multi-functional laser disc kind of numerical digit according to claim 1 determination methods is characterized in that wherein step (b) more comprises:
Driving the multi-functional one default required time of the number of turns of laser disc rotation of this numerical digit with the Spindle Motor of CD-ROM device is the unit interval, calculates the frequency of this swing signal.
5, the multi-functional laser disc kind of numerical digit according to claim 4 determination methods is characterized in that wherein said step (b) more comprises:
Should swing the signal frequency elimination with a frequency elimination factor; In addition
The frequency of this swing signal that step (b) is calculated is the frequency for this swing signal behind the frequency elimination.
6, the multi-functional laser disc kind of numerical digit according to claim 5 determination methods is characterized in that wherein said step (b) more comprises:
If the frequency of this swing signal behind the frequency elimination judges then that less than this first frequency the kind of the multi-functional laser disc of this numerical digit is this first kind;
If the frequency of this swing signal behind the frequency elimination is positioned at data that this second frequency multiply by the inner ring of the multi-functional laser disc of this numerical digit and transmits multiplying power and multiply by this frequency elimination factor, and the data transmission multiplying power that this second frequency multiply by the multi-functional laser disc outmost turns of this numerical digit multiply by between this frequency elimination factor, judges that then the kind of the multi-functional laser disc of this numerical digit is this second kind; And
If the frequency of this swing signal behind the frequency elimination is positioned at data that the 3rd frequency multiply by the inner ring of the multi-functional laser disc of this numerical digit and transmits multiplying power and multiply by this frequency elimination factor, and the data transmission multiplying power that the 3rd frequency multiply by the multi-functional laser disc outmost turns of this numerical digit multiply by between this frequency elimination factor, judges that then the kind of the multi-functional laser disc of this numerical digit is this third class.
7, the multi-functional laser disc kind of a kind of numerical digit judgment means is characterized in that it comprises:
One capture device from the multi-functional laser disc acquisition one swing signal of a numerical digit, should be swung the signal digitisation, and this swing signal of output digitization; And
One judgment means is coupled to this capture device, according to the frequency of this swing signal, judges and export the kind of the multi-functional laser disc of this numerical digit.
8, the multi-functional laser disc kind of numerical digit according to claim 7 judgment means is characterized in that it more comprises:
One wave filter is coupled to the input end of this judgment means, receives this swing signal of digitisation, the noise that filtering should the swing signal, and this swing signal behind the output filtering noise information;
One frequency counter is coupled to this wave filter, according to this swing signal behind the filtering noise information, calculates and export the frequency of this swing signal; And
One determining device is coupled to this frequency counter, according to the frequency height of this swing signal, judges and export the kind of the multi-functional laser disc of this numerical digit.
9, the multi-functional laser disc kind of numerical digit according to claim 8 judgment means, it is characterized in that wherein said frequency counter also receives one and starts signal, and according to the frequency of this swing signal of this startup signal decision when beginning to calculate, this frequency counter also receives the rotary speed signal that a Spindle Motor of CD-ROM device is sent in addition, and according to this rotary speed signal, driving the multi-functional one default required time of the number of turns of laser disc rotation of this numerical digit with this Spindle Motor is the unit interval, calculates the frequency of this swing signal.
10, the multi-functional laser disc kind of numerical digit according to claim 9 judgment means is characterized in that wherein said determining device is a frequency at this swing signal during less than a first frequency, and the kind of judging the multi-functional laser disc of this numerical digit is one first kind; This determining device is that frequency at this swing signal is positioned at the data transmission multiplying power that a second frequency multiply by the inner ring of the multi-functional laser disc of this numerical digit in addition, and when this second frequency multiply by between the data transmission multiplying power of the multi-functional laser disc outmost turns of this numerical digit, the kind of judging the multi-functional laser disc of this numerical digit was one second kind; This determining device is that frequency at this swing signal is positioned at the data transmission multiplying power that one the 3rd frequency multiply by the inner ring of the multi-functional laser disc of this numerical digit in addition, and when the 3rd frequency multiply by between the data transmission multiplying power of the multi-functional laser disc outmost turns of this numerical digit, the kind of judging the multi-functional laser disc of this numerical digit was the third class.
11, the multi-functional laser disc kind of numerical digit according to claim 10 judgment means, it is characterized in that wherein said second frequency is 140.6KHz, the 3rd frequency is 817.5KHz, and this first kind is DVD-ROM in addition, this second kind is DVD-, and this third class is DVD+.
12, the multi-functional laser disc kind of numerical digit according to claim 10 judgment means is characterized in that wherein said judgment means more comprises:
One frequency eliminator is coupled between this wave filter and this frequency counter, receives this swing signal behind the filtering noise information that this wave filter exports, and should swing the signal frequency elimination with a frequency elimination factor, and this swing signal behind the output frequency elimination is to this frequency counter.
13, the multi-functional laser disc kind of numerical digit according to claim 12 judgment means is characterized in that wherein said determining device is a frequency at this swing signal during less than this first frequency, judges that the kind of the multi-functional laser disc of this numerical digit is this first kind; This determining device is that frequency at this swing signal is positioned at the data transmission multiplying power that this second frequency multiply by the inner ring of the multi-functional laser disc of this numerical digit and multiply by this frequency elimination factor in addition, and when the data transmission multiplying power that this second frequency multiply by the multi-functional laser disc outmost turns of this numerical digit multiply by between this frequency elimination factor, judge that the kind of the multi-functional laser disc of this numerical digit is this second kind; This determining device is that frequency at this swing signal is positioned at the data transmission multiplying power that the 3rd frequency multiply by the inner ring of the multi-functional laser disc of this numerical digit and multiply by this frequency elimination factor in addition, and when the data transmission multiplying power that the 3rd frequency multiply by the multi-functional laser disc outmost turns of this numerical digit multiply by between this frequency elimination factor, judge that the kind of the multi-functional laser disc of this numerical digit is this third class.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BRPI0418819-5A BRPI0418819A (en) | 2004-05-25 | 2004-12-03 | Method and apparatus for determining the type of a versatile digital disc |
| 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 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US57466504P | 2004-05-25 | 2004-05-25 | |
| US60/574,665 | 2004-05-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1601639A true CN1601639A (en) | 2005-03-30 |
| CN1312690C CN1312690C (en) | 2007-04-25 |
Family
ID=34676931
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200410088448XA Active CN1312690C (en) | 2004-05-25 | 2004-10-29 | Sorts recognition method and device for digital multifunctional optical discs |
| CNB200410061584XA Active CN1324597C (en) | 2004-05-25 | 2004-12-27 | Sorts recognition method and device for digital multifunctional optical discs |
| CNB2005100719792A Active CN100367367C (en) | 2004-05-25 | 2005-05-25 | Method for determining type of digital versatile disc |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200410061584XA Active CN1324597C (en) | 2004-05-25 | 2004-12-27 | Sorts recognition method and device for digital multifunctional optical discs |
| CNB2005100719792A Active CN100367367C (en) | 2004-05-25 | 2005-05-25 | Method for determining type of digital versatile disc |
Country Status (5)
| Country | Link |
|---|---|
| CN (3) | CN1312690C (en) |
| BR (1) | BRPI0418821A (en) |
| RU (2) | RU2006141413A (en) |
| TW (3) | TWI340964B (en) |
| WO (1) | WO2005117009A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7570561B2 (en) | 2004-05-25 | 2009-08-04 | Bryan Tai | Method for determining type of digital versatile discs |
| 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 |
| 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 |
| US7843786B2 (en) | 2002-10-24 | 2010-11-30 | Yi-Chung Chan | Discrimination method of optical storage medium |
| US7995434B2 (en) | 2003-10-31 | 2011-08-09 | Tian Holdings, Llc | Method and apparatus for generating absolute time in pregroove data |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3831063B2 (en) * | 1997-04-25 | 2006-10-11 | パイオニア株式会社 | Optical disc discrimination device |
| JP2000251280A (en) * | 1999-02-24 | 2000-09-14 | Asahi Optical Co Ltd | Pickup performance measuring method and apparatus for optical disk |
| JP2000322742A (en) * | 1999-05-10 | 2000-11-24 | Matsushita Electric Ind Co Ltd | Optical disk device |
| JP3696044B2 (en) * | 2000-04-21 | 2005-09-14 | 松下電器産業株式会社 | Optical disc apparatus and optical disc discrimination method |
| JP4491943B2 (en) * | 2000-09-22 | 2010-06-30 | ソニー株式会社 | Optical disk drive and optical disk identification method |
| 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 |
| JP2003078392A (en) * | 2001-09-04 | 2003-03-14 | Sony Corp | Automatic follow-up type band-pass filter and optical disk reproducing device |
| 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 |
| JP2004110901A (en) * | 2002-09-17 | 2004-04-08 | Sanyo Electric Co Ltd | Method for determining type of disk, and disk device |
| CN100337280C (en) * | 2004-02-17 | 2007-09-12 | 联发科技股份有限公司 | Method for distinguishing optical disk form |
-
2004
- 2004-09-15 TW TW093127819A patent/TWI340964B/en active
- 2004-10-06 TW TW93130202A patent/TWI307494B/en active
- 2004-10-29 CN CNB200410088448XA patent/CN1312690C/en active Active
- 2004-12-03 RU RU2006141413/28A patent/RU2006141413A/en not_active Application Discontinuation
- 2004-12-08 TW TW93137921A patent/TWI253060B/en active
- 2004-12-27 BR BRPI0418821-7A patent/BRPI0418821A/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 CN CNB200410061584XA patent/CN1324597C/en active Active
-
2005
- 2005-05-25 CN CNB2005100719792A patent/CN100367367C/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7843786B2 (en) | 2002-10-24 | 2010-11-30 | Yi-Chung Chan | Discrimination method of optical storage medium |
| 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 |
| US7995434B2 (en) | 2003-10-31 | 2011-08-09 | Tian Holdings, Llc | Method and apparatus for generating absolute time in pregroove data |
| US7570561B2 (en) | 2004-05-25 | 2009-08-04 | Bryan Tai | Method for determining type of digital versatile discs |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2005117009A1 (en) | 2005-12-08 |
| TWI253060B (en) | 2006-04-11 |
| TWI307494B (en) | 2009-03-11 |
| CN1324597C (en) | 2007-07-04 |
| TW200539115A (en) | 2005-12-01 |
| CN1637909A (en) | 2005-07-13 |
| CN1312690C (en) | 2007-04-25 |
| RU2006140292A (en) | 2008-06-27 |
| CN100367367C (en) | 2008-02-06 |
| TW200539116A (en) | 2005-12-01 |
| CN1700311A (en) | 2005-11-23 |
| TW200539114A (en) | 2005-12-01 |
| RU2006141413A (en) | 2008-06-27 |
| TWI340964B (en) | 2011-04-21 |
| BRPI0418821A (en) | 2007-11-13 |
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Owner name: YUTIAN STOCK CO., LTD. Free format text: FORMER OWNER: WEISHENG ELECTRONICS CO., LTD. Effective date: 20080201 |
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