CN1700311A - Method for determining type of digital versatile disc - Google Patents
Method for determining type of digital versatile disc Download PDFInfo
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- CN1700311A CN1700311A CN 200510071979 CN200510071979A CN1700311A CN 1700311 A CN1700311 A CN 1700311A CN 200510071979 CN200510071979 CN 200510071979 CN 200510071979 A CN200510071979 A CN 200510071979A CN 1700311 A CN1700311 A CN 1700311A
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- peak
- dvd
- swinging signal
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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
A method for determining the type of a digital versatile disc (DVD) so that a DVD+ can be distinguished from a DVD-. The main steps for determining the type of a DVD include setting up related parameters, reading a general wobble signal or a wobble signal within the general wobble signal from a DVD to obtain a peak hold value and a trough hold value. The peak and trough hold values of the general wobble signal are read to derive a peak-to-peak voltage. Finally, if the peak-to-peak voltage is greater than a predetermined threshold value, the DVD is classified as a DVD-, otherwise it is classified as a DVD+.
Description
Technical field
The invention relates to a kind of method of judging type of digital versatile disc, and particularly about a kind of method of differentiating DVD-and DVD+ CD-RW discsCD-RW.
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 data that reads, read only memory just) 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 positional 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 its source please refer to shown in Figure 1.When CD-RW discsCD-RW was rotated in DVD CD-ROM device the inside, read/write head 101 can follow track 102 and outwards skid off.As shown in the figure, four area arrangement of A, B, C, D of the photo diode IC (light sensitive diode integrated circuit) of read/write head 101 can be sensed the signal of varying strength as shown in Figure 1 separately at this moment, and swinging signal is to obtain according to following formula:
G×[g1×(A+D)-g2×(B+C)]
Wherein G, g1 and g2 are 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 current position information after decipher via logical operation circuit.Fig. 2 illustrates the swinging signal of DVD+, contains a plurality of phase change zones 202 among swinging signal 201, and this swinging signal can be obtained positional information after logical circuit computing decipher.Swinging signal as for DVD-please refer to Fig. 3, contains the default hole (land pre-pit) 302 of a plurality of burrs among swinging signal 301, and in like manner positional information can obtain via logical circuit computing 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.
Fig. 4 is the process flow diagram of the present method for determining type of digital versatile disc that uses.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 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 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 positional information quality can variation, often erroneous judgement easily.Therefore, we need a kind of method to solve this problem, to reduce the erroneous judgement probability of DVD+ and DVD-.
Summary of the invention
The invention provides a kind of method for determining type of digital versatile disc,, improve the correct judgement rate of DVD+ and DVD-CD-RW discsCD-RW to overcome the prior art shortcoming of erroneous judgement easily.
One embodiment of the invention are a kind of method for determining type of digital versatile disc, its key step is: set correlation parameter earlier, read a general swinging signal (other signal that comprises a swinging signal and can read simultaneously) according to the parameter of having set from a digital versatile disc then.Can also adjust size to the preset standard value of swinging signal at this.Then, read the maximum persistent value and the minimum persistent value of general swinging signal, try to achieve the peak according to this peak magnitude of voltage (be generally class specific revolution word after result).At last, if the peak to the peak magnitude of voltage greater than a preset critical, judge that then the kind of this digital versatile disc is DVD-, otherwise judge that the kind of this digital versatile disc is DVD+.Certainly, if the peak is zero to the peak magnitude of voltage or less than another preset critical, the kind that can judge this digital versatile disc is DVD-ROM.
The above embodiments can have another kind of the variation, after reading general swinging signal, in this size that can also adjust general swinging signal to another preset standard value.Then, read the maximum persistent value and the minimum persistent value of swinging signal, try to achieve the peak according to this peak magnitude of voltage.At last, as the foregoing description, comparison peak is to the size of peak magnitude of voltage and two other preset critical, and the kind of judging this digital versatile disc is DVD-, DVD+ or DVD-ROM.
The method for determining type of digital versatile disc that the present invention proposes, be that peak according to swinging signal or general swinging signal is to peak magnitude of voltage size, to differentiate DVD-and these two kinds of digital versatile discs of DVD+, be not according to prior art rely in be contained in current position information in the swinging signal, therefore be enough to overcome the shortcoming of prior art, improve the correct judgement rate of DVD CD-RW discsCD-RW kind.
For above-mentioned and other guide, feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below.
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 previous method for determining type of digital versatile disc process flow diagram.
Fig. 5 is the process flow diagram of an embodiment of the method for determining type of digital versatile disc of the present invention's proposition.
Fig. 6 is the process flow diagram of another embodiment of the method for determining type of digital versatile disc of the present invention's proposition.
A, B, C, D: four zones of CD-ROM device read/write head
The read/write head of 101:DVD CD-ROM device
Track on the 102:DVD CD-RW discsCD-RW
The swinging signal of 201:DVD+
The phase change zone that the swinging signal of 202:DVD+ includes
The big minizone of the swinging signal of 203:DVD+ and peak are to the peak magnitude of voltage
The maximum persistent value of the swinging signal of 204:DVD+
The minimum persistent value of the swinging signal of 205:DVD+
The swinging signal of 301:DVD-
The burr that the general swinging signal of 302:DVD-includes is preset the hole
The big minizone of the swinging signal of 303:DVD-
The peak of the general swinging signal of 304:DVD-is to the peak magnitude of voltage
The maximum persistent value of the general swinging signal of 305:DVD-
The minimum persistent value of the general swinging signal of 306:DVD-
402: set the correlation parameter that DVD+ uses
404,410: read current position?
406、516：DVD+
408,502: set the correlation parameter that DVD-uses
412、514：DVD-
414、520：DVD-ROM
504: read general swinging signal
508: read maximum persistent value and minimum persistent value
510: try to achieve the peak to the peak magnitude of voltage
512: the peak to the peak magnitude of voltage greater than critical value?
518: the peak to the peak magnitude of voltage greater than another critical value?
Embodiment
The key of one embodiment of the invention is to read general swinging signal (comprising swinging signal and other signal that can read in the lump) and find out its maximum persistent value (peak hold value) and minimum persistent value (bottom hold value), the peak of trying to achieve general swinging signal then (for example is the gap between a maximum persistent value and the adjacent minimum persistent value to peak magnitude of voltage (peak-to-peakvoltage), and be generally result behind the class specific revolution word), and according to the peak to the size of peak magnitude of voltage to distinguish DVD+ and DVD-(even DVD-ROM).Why not together, peak as for these two kinds of DVD has the peak magnitude of voltage, please refer to Fig. 2 and Fig. 3.
Fig. 2 illustrates the general swinging signal of DVD+, and it only comprises a swinging signal 201, contains a plurality of phase change zones 202 among swinging signal 201.The maximum persistent value of this swinging signal 201 is denoted as 204 in the drawings, and minimum persistent value is denoted as 205 in the drawings.Upper limb that two persistent values are respectively swinging signal 201 and lower edge, and the peak is exactly that maximum persistent value 204 deducts minimum persistent value 205 to peak magnitude of voltage 203, the just big minizone of swinging signal 201 itself.Certainly, for asking simplification, the peak can be adjacent upper limb and the gap between the lower edge to peak magnitude of voltage 203.
The general swinging signal of the DVD-that illustrates as for Fig. 3 is with regard to more complicated.As shown in Figure 3, because the default hole (land pre-pit) 302 of burr that the general swinging signal of DVD-has comprised a swinging signal 301 simultaneously and depended on swinging signal 301, therefore maximum persistent value 305 is the default tips, hole of burr that are positioned at the top, and minimum persistent value 306 is positioned at the default tip, hole of the burr of below.Also because like this, the gap of two persistent values, just the peak of general swinging signal is to peak magnitude of voltage 304, can be bigger than the big minizone 303 (peak that is swinging signal 301 is to the peak magnitude of voltage) of swinging signal 301 itself.Certainly, for asking simplification, the peak to peak magnitude of voltage 304 can be adjacent one above the default Kong Yuyi of burr below the default hole of burr between gap.
Say as the front, present embodiment be exactly according to the peak of DVD+ to the peak of peak magnitude of voltage 203 and DVD-to the difference in size between peak magnitude of voltage 304 or 303, distinguish DVD+ and DVD-.At this, utilize the general swinging signal of DVD-to have the default hole of burr, and the general swinging signal of DVD+ there is not burr to preset the hole, it is significantly different to allow DVD-and the peak of DVD+ that the peak magnitude of voltage is had, and the pipeline of the kind of the multi-functional laser disc of discriminating digit is provided.Particularly present embodiment can also will be adjusted to from the size of the swinging signal in the general swinging signal of the multi-functional laser disc of different digital near the preset standard value, use and eliminate the caused difference in size of different digital laser disc, more can allow the peak nearly all be that existence owing to the default hole of burr produces, and be easy to distinguish DVD-and DVD+ than known techniques significantly the difference of peak magnitude of voltage.
The detailed process of another embodiment of the present invention please refer to Fig. 5.At first, suppose that unknown CD-RW discsCD-RW kind is DVD-, therefore step 502 can be set the correlation parameter that DVD-uses, step 504 is understood the correlation parameter that uses step 502 to set then, read general swinging signal on the CD-RW discsCD-RW of the unknown, and then step 508 can read the maximum persistent value and the minimum persistent value of the swinging signal in the general swinging signal.Then, step 510 can be according to these two persistent values, and the peak of trying to achieve swinging signal is to the peak magnitude of voltage.If this moment, unknown CD-RW discsCD-RW was DVD-really, although do not consider the influence in the default hole of burr this moment, but because DVD-and DVD+ character different make that both peaks of swinging signal are different to the peak magnitude of voltage, therefore by choosing suitable critical value, DVD-and DVD+ are distinguished to the peak magnitude of voltage in the peak that still can see through swinging signal.Therefore step 512 can judge the peak to the peak magnitude of voltage whether greater than a default critical value, if step 514 can judge that unknown CD-RW discsCD-RW kind be DVD-, otherwise step 516 can judge that the CD-RW discsCD-RW kind of the unknown be DVD+.
By above explanation as can be known, the method for determining type of digital versatile disc that the present invention proposes, be that peak according to swinging signal is to peak magnitude of voltage size, to differentiate DVD-and these two kinds of digital versatile discs of DVD+, be not according to prior art rely in be contained in current position information in the swinging signal, therefore be enough to overcome the shortcoming of prior art, improve the correct judgement rate of DVD CD-RW discsCD-RW kind.
And further, utilize DVD-ROM not have swinging signal, that is the big or small amplitude of its swinging signal is zero feature, the flow process that another embodiment of the present invention can also be revised Fig. 5 arrives as shown in Figure 6, when step 512 find the peak to the peak magnitude of voltage less than first critical value after, do not judge at once that it is DVD+, but carry out again step 518 judge the peak to the peak magnitude of voltage whether greater than second critical value (less than first critical value and can be to drive to be bordering on zero, as 0.03 volt), if be not less than and then be judged as DVD+, and if be judged as DVD-ROM less than being convenient to step 520.
In the above embodiments, read in step 508 before the maximum persistent value and minimum persistent value of swinging signal, the size of whole general swinging signal can also be adjusted near the preset standard value, to eliminate the caused difference in size of different digital laser disc.
The above embodiments are with the peak of swinging signal the peak magnitude of voltage to be judged the laser disc kind, and in another embodiment of the present invention, are with the peak of whole general swinging signal the peak magnitude of voltage to be judged.The flow process of this embodiment can be continued to use Fig. 6 and be illustrated, and what just step 508 read is the maximum persistent value and the minimum persistent value of whole general swinging signal, and what try to achieve in step 510 is that the peak of whole general swinging signal is to the peak magnitude of voltage.Next just as shown in Figure 6, comparison peak judges that to the size of peak magnitude of voltage and two preset critical the kind of digital versatile disc is DVD-, DVD+ or DVD-ROM.But two of present embodiment preset critical and last embodiment use needn't be identical.And, read in step 508 before the maximum persistent value and minimum persistent value of whole general swinging signal, the size of the swinging signal in the middle of the general swinging signal can also be adjusted near the preset standard value, to eliminate the caused difference in size of different digital laser disc.The preset standard value here, with last embodiment use needn't be identical.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; anyly have the knack of this skill person; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking accompanying the claim person of defining.
Claims (15)
1, a kind of method for determining type of digital versatile disc is characterized in that it comprises the following steps:
(a) receive a general swinging signal, this general swinging signal comprises a swinging signal at least, and can be included in the signal that can be read in the lump when this digital versatile disc reads this swinging signal again;
(b) this general swinging signal is tried to achieve a peak to the peak magnitude of voltage certainly; And
(c), judge the kind of this digital versatile disc according to the size of this peak to the peak magnitude of voltage.
2, method according to claim 1 is characterized in that wherein step (c) more comprises:
If this peak, is judged that then the kind of this digital versatile disc is DVD-, otherwise is judged that the kind of this digital versatile disc is DVD+ greater than one first preset critical the peak magnitude of voltage.
3, method according to claim 1 is characterized in that wherein step (c) more comprises:
If less than one second preset critical, the kind of then judging this digital versatile disc is DVD-ROM to the peak magnitude of voltage at this peak.
4, method according to claim 1, it is characterized in that wherein said peak to the peak magnitude of voltage for the peak of this general swinging signal to the peak magnitude of voltage.
5, method according to claim 4 is characterized in that it more is included in step (a) afterwards and between the step (b), carries out step (d):
Adjust size to the preset standard value of this swinging signal.
6, method according to claim 5 is characterized in that it still can be with the resize ratio of other signal in this general swinging signal according to this swinging signal, equal proportion adjustment.
7, method according to claim 4 is characterized in that wherein step (b) more comprises:
Read a maximum persistent value and a minimum persistent value of this general swinging signal; And
According to the gap between this maximum persistent value and this minimum persistent value, the peak of trying to achieve this general swinging signal is to the peak magnitude of voltage.
8, method according to claim 4 is characterized in that when this digital versatile disc is DVD-, and this peak is to preset difference mutually between the hole for a default hole of the top burr in this general swinging signal and an adjacent below burr to the peak magnitude of voltage.
9, method according to claim 1, it is characterized in that wherein said peak to the peak magnitude of voltage for the peak of this swinging signal to the peak magnitude of voltage.
10, method according to claim 9 is characterized in that it more is included in step (a) afterwards and between the step (b), carries out step (d):
Adjust size to the preset standard value of this general swinging signal.
11, method according to claim 9 is characterized in that wherein said step (b) more comprises:
Read a maximum persistent value and a minimum persistent value of this swinging signal; And
According to the gap between this maximum persistent value and this minimum persistent value, the peak of trying to achieve this swinging signal is to the peak magnitude of voltage.
12, method according to claim 9 is characterized in that when this digital versatile disc is DVD-, and this peak is to be the difference mutually between upper limb in this swinging signal and the adjacent lower edge to the peak magnitude of voltage.
13, method according to claim 1 is characterized in that when this digital versatile disc is DVD+, and this peak is to be the difference mutually between upper limb in this swinging signal and the adjacent lower edge to the peak magnitude of voltage.
14, method according to claim 1 is characterized in that it more is included in step (a) before, carries out step (e) earlier:
Set correlation parameter, to read this general swinging signal from this digital versatile disc.
15, method according to claim 14 is characterized in that wherein said step (e) more comprises:
Set the correlation parameter that DVD-uses, to read this swinging signal from this digital versatile 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 |
|---|---|
| CN1700311A true CN1700311A (en) | 2005-11-23 |
| CN100367367C CN100367367C (en) | 2008-02-06 |
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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 Before (2)
| 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 |
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 |
| CN1601639A (en) | 2005-03-30 |
| 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 |
| 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: 20080125 |
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Effective date of registration: 20080125 Address after: Delaware Patentee after: VIA Tech Inc. Address before: Taiwan, China Patentee before: Weisheng Electronic Co., Ltd. |