WO2005117008A1 - Procede et dispositif pour determiner le type de disques numeriques universels - Google Patents

Procede et dispositif pour determiner le type de disques numeriques universels Download PDF

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Publication number
WO2005117008A1
WO2005117008A1 PCT/CN2004/001409 CN2004001409W WO2005117008A1 WO 2005117008 A1 WO2005117008 A1 WO 2005117008A1 CN 2004001409 W CN2004001409 W CN 2004001409W WO 2005117008 A1 WO2005117008 A1 WO 2005117008A1
Authority
WO
WIPO (PCT)
Prior art keywords
frequency
type
wobble signal
disc
digital multi
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2004/001409
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English (en)
Chinese (zh)
Other versions
WO2005117008A8 (fr
Inventor
Ricky Chang
Allen Lu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Via Technologies Inc
Original Assignee
Via Technologies Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CNB200410088448XA external-priority patent/CN1312690C/zh
Application filed by Via Technologies Inc filed Critical Via Technologies Inc
Priority to BRPI0418819-5A priority Critical patent/BRPI0418819A/pt
Publication of WO2005117008A1 publication Critical patent/WO2005117008A1/fr
Publication of WO2005117008A8 publication Critical patent/WO2005117008A8/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • G11B19/125—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark involving the detection of carrier data format

Definitions

  • the invention relates to a method and a device for judging the type of a digital multi-function optical disc, in particular to a method and a device for judging and distinguishing a type of a digital multi-function optical disc of DVD-ROM, DVD-, and DVD + disc.
  • DVD-ROMs which can only read data
  • ROM read-only memory
  • the DVDs that can be used for recording materials are divided into DVD- and DVD + because of different specifications.
  • most DVD players are compatible with a variety of different specifications, so judging the type of optical discs that users put in has become an important technology.
  • the current method is to use the position information contained in a pre-groovewobbles ignal (hereinafter referred to as a wobble signal) to determine the type of DVD.
  • a wobble signal a pre-groovewobbles ignal
  • DVD-ROM does not have a wobble signal
  • DVD- and DVD + will have wobble signals in addition to the normal track.
  • Figure 1 for the source.
  • the read-write head 101 will slide out along the track 102, as shown in the figure.
  • the photodiodeIC of the read-write head 101 is arranged as shown in Figure 1. Display, the four areas of people, B, C, and D will each sense signals of different strengths, and the swing signal is obtained according to the following formula:
  • G, ⁇ 1 and g2 are all adjustable gain values (ga in).
  • DVD- and DVD + each have a set of positioning methods that are mixed in the wobble signal.
  • the current position information can be obtained after interpretation by logical operation circuits.
  • Figure 2 shows the wobble signal of DVD +.
  • the wobble signal 201 contains multiple phase change regions 202. After the wobble signal is interpreted by the logic operation circuit, position information can be obtained.
  • the wobble signal of DVD- please refer to FIG. 3.
  • the wobble signal 301 contains a plurality of land-preset holes 302. Similarly, the position information can be obtained by interpreting the logic circuit. It can be seen from FIG. 2 and FIG. 3 that the wobble signals of DVD + and DVD- are different, and the interpretation function of the logic operation circuit is also different, so it can be used to judge the type of DVD.
  • step 402 will first guess the disc inserted by the user as DVD +, so set the relevant parameters used by DVD +, and then step 404 will try to read the current location information. If the reading is successful, step 406 will determine the type of the disc. DVD +. Otherwise, the next step 408 will guess the disc is DVD-, and set the relevant parameters for DVD-, and then step 410 will try to read again If the current location information is successful, step 412 determines that the type of the optical disc is DVD-; otherwise, step 414 determines that the type of the optical disc is DVD-ROM.
  • a novel structured method and device for determining the type of a digital multifunctional optical disc can improve the existing methods and devices for determining the type of a digital multifunctional optical disc, and make it more practical. After continuous research and design, and after repeated trial production of samples and improvements, the present invention was finally created with practical value. Summary of the invention
  • the purpose of the present invention is to overcome the shortcomings of the existing digital multi-function disc type determination method and provide a new digital multi-function disc type determination method.
  • the technical problem to be solved is to make it easy to misjudge. It is more suitable for practical use, and has industrial use value.
  • Another object of the present invention is to provide a digital multi-function disc type judging device.
  • the technical problem to be solved is to overcome the disadvantages of the prior art, improve the probability of correctly judging the type of digital multi-function discs, and thus be more suitable for practical use.
  • a method for determining the type of a digital multi-function optical disc according to the present invention includes the following steps: (a) retrieving a wobble signal from a digital multi-function disc; and (b) judging the number of digital bits based on the frequency of the wobble signal. Type of function disc.
  • the step (b) further includes: if the frequency of the wobble signal is less than a first frequency, determining that the type of the digital multifunctional disc is a first type; if the The frequency of the wobble signal is between a second frequency multiplied by the data transmission magnification of the innermost circle of the digital multi-function disc and the second frequency multiplied by the data transmission magnification of the outermost circle of the digital multi-function disc.
  • the type of the multifunctional light beam is a second type; and if the The frequency of the wobble signal is between a third frequency multiplied by the data transmission magnification of the innermost circle of the digital multi-function disc and the third frequency multiplied by the data transmission magnification of the outermost circle of the digital multi-function disc.
  • the type of the multi-function disc is a third type.
  • the third frequency is 817.5KHz
  • the first type is DVD-ROM
  • the second type is DVD-
  • the third type is DVD +.
  • step (b) further includes: calculating the wobble by taking a time required by the spindle motor of the optical disc drive to rotate the digital multi-function disc by a predetermined number of revolutions as a unit time. The frequency of the signal.
  • the step (b) further includes: dividing the wobble signal by a division factor; and the frequency of the wobble signal calculated in step (b) is to divide The frequency of the wobble signal after the frequency.
  • the step (b) further includes: if the frequency of the wobble signal after the frequency division is smaller than the first frequency, determining the type of the digital multi-function disc as the first Type; if the frequency of the wobble signal after frequency division is located at the second frequency multiplied by the innermost data transmission rate of the digital multi-function disc multiplied by the frequency division factor, and the second frequency multiplied by the digital multi-function disc The data transmission ratio of the outermost circle is multiplied by the frequency division factor, it is determined that the type of the digital multifunctional optical fiber is the second type; and if the frequency of the wobble signal after frequency division is located at the third frequency multiplied by The data transmission magnification of the innermost circle of the digital multi-function disc is multiplied by the frequency division factor, and the third frequency is multiplied by the data transmission magnification of the outermost circle of the digital multi-function disc by the frequency division factor.
  • the type of the digital versatile disc is this third type.
  • a digital multi-function disc type judging device includes: an acquisition device, which captures a wobble signal from a digital multi-function disc, digitizes the wobble signal, and outputs the digitized wobble signal And a judging device, coupled to the capturing device, judging and outputting the type of the digital multifunctional optical disc according to the frequency of the wobble signal.
  • the foregoing digital multifunctional disc type determination device further includes: a filter coupled to the input end of the determination device, receiving the digitized wobble signal, filtering out noise of the wobble signal, and outputting filtering noise The wobble signal after the signal; a frequency counter coupled to the filter, calculating and outputting the frequency of the wobble signal according to the wobble signal after filtering out noise; and a judger coupled to the frequency counter The device judges and outputs the type of the digital multi-function disc according to the frequency of the wobble signal.
  • the frequency counter also receives an activation signal, and determines when to start calculating the frequency of the wobble signal according to the activation signal.
  • the frequency counter also receives A speed signal sent by a spindle motor, and according to the speed signal The frequency of the wobble signal is calculated by taking the time required for the spindle motor to drive the digital multi-function disc to rotate a preset number of revolutions as a unit time.
  • the type of the digital multi-function disc is a first type; in addition, the determiner is When the frequency of the wobble signal is between a second frequency multiplied by the data transmission magnification of the innermost circle of the digital multi-function disc and the second frequency multiplied by the data transmission magnification of the outermost circle of the digital multi-function disc, The type of the digital multi-function disc is a second type; in addition, the determiner is a third frequency multiplied by the data transmission magnification of the innermost circle of the digital multi-function disc at the frequency of the wobble signal and multiplied by the third frequency. When the data transmission magnification of the outermost circle of the digital multi-function disc is determined, the type of the digital multi-function disc is determined to be a third type.
  • the third frequency is 817.5Hz
  • the first type is DVD-ROM
  • the second type is DVD-
  • the third type is DVD +.
  • the foregoing digital multi-function optical disc type judging device wherein the judging device further includes: a frequency divider coupled between the filter and the frequency counter, and receiving the filtered noise output by the filter.
  • the wobble signal is frequency-divided by a frequency dividing factor, and the wobble signal after frequency division is output to the frequency counter.
  • the judging device judges that the type of the digital multi-function disc is the first type when the frequency of the wobble signal is less than the first frequency;
  • the frequency of the wobble signal is located at the second frequency multiplied by the data transmission magnification of the innermost circle of the digital versatile disc multiplied by the frequency division factor, and the second frequency multiplied by the data transmission magnification of the outermost circle of the digital versatile disc.
  • the frequency of the wobble signal is located at the third frequency multiplied by the innermost circle of the digital multi-function disc Multiplying the data transmission magnification by the frequency division factor and the third frequency multiplied by the data transmission magnification of the outermost circle of the digital multifunctional disc by the frequency dividing factor, determining the type of the digital multifunctional disc as the The third category.
  • a preferred embodiment of the present invention proposes a method for determining the type of a digital multi-function optical disc.
  • the main steps include: setting related parameters, and capturing from a digital multi-function optical disc.
  • a wobble signal, and a frequency division factor is set to divide the above-mentioned wobble signal by the frequency division factor.
  • the time required for the digital multi-function disc to rotate once by the spindle motor of the optical disc drive as a unit time is used to calculate the frequency of the wobble signal after the frequency division.
  • the type of the digital multi-function disc is determined.
  • another preferred embodiment of the present invention further proposes a digital multifunctional disc type judging device, including: an acquisition device, which captures a wobble signal from a digital multifunctional disc, and swings the wobble signal Digitize and output a digitized wobble signal; and a judgment device It is coupled to the above-mentioned capturing device, and judges and outputs the type of the digital multi-function optical disc according to the frequency of the wobble signal.
  • the judgment device further includes: a filter coupled to the input end of the judgment device, receiving a digital wobble signal, filtering noise of the wobble signal, and outputting the wobble signal after filtering the noise; A frequency counter coupled to the above-mentioned filter, calculating and outputting the frequency of the swing signal based on the noise-filtered swing signal; and a judger coupled to the above-mentioned frequency counter, based on the swing signal High and low frequency, judge and output the type of digital multi-function disc.
  • the method and device for determining the type of a digital multi-function optical disc with a special structure of the present invention solve the problem of easy misjudgment and increase the probability of correctly determining the type of a digital multi-function optical disc. It has many of the above advantages and practical values, and has not seen similar designs and methods published or used in similar products and methods. It is indeed an innovation. It has great improvements in both products and functions. It has made great progress, and has produced useful and practical effects, and has a number of improved functions over the existing digital multi-function disc type determination methods and devices, which is more suitable for practical use and has extensive industrial use. Value, hereby a new, progressive and practical new design.
  • Figure 1 is a schematic diagram of the source of the wobble signal.
  • Figure 2 is a schematic diagram of a DVD + wobble signal.
  • Figure 3 is a schematic diagram of a DVD-wobble signal.
  • FIG. 4 is a flowchart of a conventional method for judging the type of a digital multifunctional optical beam.
  • FIG. 5 is a frequency range of wobble signals of three digital multi-function optical discs according to an embodiment of the present invention.
  • FIG. 6 is a structural diagram of an embodiment of a digital multi-function disc type judging device according to the present invention.
  • FIG. 7 is a flowchart of an embodiment of a method for determining a type of a digital multi-function optical disc according to the present invention.
  • A, B, C, D Four areas of the optical disk drive read / write head
  • DVD + wobble signal contains phase change area
  • 602 judging device 603
  • 604 Frequency divider
  • 605 Frequency counter
  • DVD-ROM 716 DVD-ROM
  • the present invention uses a wobbl es igna l frequency of a digital multi-function optical disc (digi ta lversa ti ledi sc, abbreviated as DVD) to distinguish a DVD-ROM ("ROM” in the following stands for read-only memory, also Readonlymemory), DVD-, and DVD +.
  • DVD digital multi-function optical disc
  • ROM read-only memory
  • DVD + DVD +
  • the wobble signal frequency of DVD- and DVD + will be a range, not a single number.
  • the logic circuit that analyzes the wobble signal there may be a "frequency division" action, which is to reduce the frequency of the wobble signal by a fixed frequency division factor. For example, if the frequency division factor is 1/2, then the frequency is divided. The frequency of the wobble signal is 1/2 of the original. Obviously, the wobble signal frequency read in the innermost circle of DVD + should be:
  • the optical disc drive rotates in a four-speed CAV mode, so the innermost circle data transmission ratio is approximately 2 times, and the outermost circle data transmission about 4-fold magnification, and the frequency dividing factor of 1/2.
  • the wobble signal frequency range of DVD + is from KHz to 1.6MHz
  • the wobble signal frequency range of DVD- is from HOKHz to 280KHz
  • DVD-ROM is 0, as shown in Figure 5.
  • the DVD-ROM may have a small wobble signal frequency due to the error of the real environment, which will not affect the judgment of the present invention.
  • FIG. 5 shows the wobble signal frequency range of three digital multi-function discs according to an embodiment of the present invention.
  • the frequency ranges of the three types of optical discs do not overlap, and they are far apart. Therefore, there is no need to worry about reading different wobble frequencies at different positions on the disc and causing misjudgment.
  • FIG. 6 is a structural diagram of an embodiment of a digital multi-function disc type judging device according to the present invention
  • FIG. 7 is an embodiment of a digital multi-function disc type judging method according to the present invention.
  • This embodiment includes a frequency division operation. All relevant numbers and details have taken frequency division into consideration. In fact, this operation can be omitted. If the frequency is not divided, the frequency range of the wobble signal in Fig. 5 must be removed. In the following device architecture diagram (Fig. 6), the relevant components of the frequency division must be removed. The following method flowchart (Fig. 7) In addition, the steps related to frequency division must also be removed.
  • the capturing device 601 captures the wobble signal 607 from the digital multi-function disc, digitizes the wobble signal 607 and outputs it to the judging device 602.
  • the judging device 602 judges the type of the digital multi-function disc according to the frequency of the swing signal 607, and outputs the type signal 610 of the disc.
  • the judging device 602 includes several components.
  • the filter 603 receives a digitalized wobble signal 607, filters out the noise of the wobble signal, and outputs the filtered wobble signal to the frequency divider 604 (of course, in the When the noise is not large or does not cause difficult judgment, the filter 603 can be omitted.
  • the frequency divider 604 divides the wobble signal by a preset frequency division factor (1/2 in this embodiment), and outputs the frequency division.
  • the post-frequency swing signal is provided to the frequency counter 605.
  • the frequency counter 605 will receive the rotation speed signal 609 sent by the spindle motor (not shown) of the optical disc drive, and according to the rotation speed signal 609, the time required for the spindle motor to drive the digital multi-function disc to rotate once is taken as a unit. Time, calculate the frequency of the wobble signal after frequency division, and output this frequency to the judger 606.
  • the function of the start signal 608 is to notify the frequency counter 605 when to start calculating the frequency.
  • the judger 606 judges the type of the digital multi-function disc according to the frequency of the frequency output from the frequency counter 605 and the frequency range of various discs shown in FIG. 5 and outputs the disc type. Class signal 610.
  • step 702 sets related parameters, and step 704 captures a wobble signal from a digital multi-function disc.
  • step 706 will set the frequency division factor (for example, it can be set to 1/2 in the above example), and step 708 will use the frequency division factor to divide the wobble signal.
  • step 710 the time required by the spindle motor of the optical disc drive to drive the digital multi-function disc to rotate once is taken as a unit time to calculate the frequency of the wobble signal after the frequency division.
  • step 712 determines the type of the optical disc according to the frequency of the wobble signal after the frequency division. If the frequency is zero, step 714 determines the type is a digital versatile disc DVD-R0M o If the frequency is between 280kHz and 140KHZ, step 716 determines the type is a digital versatile disc DVD -. If the frequency is between 800 KHz and 1.6 MHz, step 718 determines that the type of the digital multi-function disc is DVD +.
  • the common frequency division factor is 2/23 or 1/2. That is, after using a certain frequency division factor, if the content of the multifunctional disc cannot be determined successfully, another frequency division factor can be used for calculation.
  • the present invention determines the type of the digital multi-function disc according to the frequency of the wobble signal, rather than the position information contained in the wobble motion as in the prior art, so the shortcomings of the prior technology that can be easily misjudged can be avoided. Increase the probability of correctly judging the type of digital versatile disc.
  • the method and device for determining the type of a digital multi-function optical disc of the present invention have at least the following advantages:
  • the present invention judges the type of the digital multi-function optical disc according to the frequency of the wobble signal, rather than the position information contained in the wobble motion as in the prior art, so it can avoid the previous technology's easy misjudgment and the difficulty of providing all optical disc drives.
  • the shortcomings of information increase the probability of correctly judging the type of digital versatile disc.

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  • Optical Recording Or Reproduction (AREA)
  • Rotational Drive Of Disk (AREA)
  • Automatic Disk Changers (AREA)

Abstract

La présente invention concerne un procédé et un dispositif pour déterminer le type de disques numériques universels (DVD), qui présentent l'avantage d'avoir une plus grande probabilité de détermination correcte du type de DVD. Les étapes principales du procédé comprennent: initialisation des paramètres associées; acquisition d'un signal oscillant d'un DVD; sélection d'un nombre pour diviser la fréquence du signal oscillant; puis comptage de la fréquence d'oscillation divisée; utilisation de l'intervalle de temps nécessaire au moteur à axe pour amener le DVD à effectuer une rotation complète, comme unité de temps; et pour finir, détermination du type de DVD sur la base de la fréquence d'oscillation.
PCT/CN2004/001409 2004-05-25 2004-12-03 Procede et dispositif pour determiner le type de disques numeriques universels Ceased WO2005117008A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BRPI0418819-5A BRPI0418819A (pt) 2004-05-25 2004-12-03 método e aparelho para determinar o tipo de um disco digital versátil

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US57466504P 2004-05-25 2004-05-25
US60/574,665 2004-05-25
CN200410088448.X 2004-10-29
CNB200410088448XA CN1312690C (zh) 2004-05-25 2004-10-29 数字多功能光盘种类判断方法与装置

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WO2005117008A1 true WO2005117008A1 (fr) 2005-12-08
WO2005117008A8 WO2005117008A8 (fr) 2006-11-23

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Cited By (6)

* Cited by examiner, † Cited by third party
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

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1348181A (zh) * 2000-09-22 2002-05-08 索尼公司 光盘驱动器和用于识别其上安装的光盘的方法
WO2003005350A1 (fr) * 2001-07-02 2003-01-16 Koninklijke Philips Electronics N.V. Support d'enregistrement et appareil de balayage dudit support d'enregistrement
JP2003016641A (ja) * 2001-06-28 2003-01-17 Matsushita Electric Ind Co Ltd 光ディスク装置及び光ディスク判別方法
JP2003078392A (ja) * 2001-09-04 2003-03-14 Sony Corp 自動追従型バンドパスフィルタおよび光ディスク再生装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1348181A (zh) * 2000-09-22 2002-05-08 索尼公司 光盘驱动器和用于识别其上安装的光盘的方法
JP2003016641A (ja) * 2001-06-28 2003-01-17 Matsushita Electric Ind Co Ltd 光ディスク装置及び光ディスク判別方法
WO2003005350A1 (fr) * 2001-07-02 2003-01-16 Koninklijke Philips Electronics N.V. Support d'enregistrement et appareil de balayage dudit support d'enregistrement
JP2003078392A (ja) * 2001-09-04 2003-03-14 Sony Corp 自動追従型バンドパスフィルタおよび光ディスク再生装置

Cited By (6)

* Cited by examiner, † Cited by third party
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

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Publication number Publication date
BRPI0418819A (pt) 2007-11-13
WO2005117008A8 (fr) 2006-11-23

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