Source: http://www.google.com/patents/US7158461?dq=6446111
Timestamp: 2017-01-21 23:06:55
Document Index: 247502059

Matched Legal Cases: ['Application No. 2002', 'Application No. 2002', 'Application No. 2002', 'Application No. 2002', 'Application No. 2002', 'Application No. 2002']

Patent US7158461 - Adaptive writing method for high-density optical recording apparatus and ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsAn adaptive writing method of a high-density optical recording apparatus and a circuit thereof. The circuit includes a discriminator for discriminating a magnitude of a present mark of input NRZI data and magnitudes of leading and/or trailing spaces of the input NRZI data, a generator for controlling...http://www.google.com/patents/US7158461?utm_source=gb-gplus-sharePatent US7158461 - Adaptive writing method for high-density optical recording apparatus and circuit thereofAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS7158461 B1Publication typeGrantApplication numberUS 09/609,822Publication dateJan 2, 2007Filing dateJul 3, 2000Priority dateDec 30, 1997Fee statusPaidAlso published asUS7209423, US7391697, US20040156292, US20060203697Publication number09609822, 609822, US 7158461 B1, US 7158461B1, US-B1-7158461, US7158461 B1, US7158461B1InventorsJin-gyo Seo, Seong-sin Joo, Du-seop Yoon, Myung-do Roh, Yong-jin Ahn, Seoung-soo Kim, Kyung-geun Lee, Myeong-ho Cho, Chang-jin Yang, Jong-Kyu Kim, Sung-ro Ko, Tatsuhiro OhtsukaOriginal AssigneeSamsung Electronics Co., Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (29), Non-Patent Citations (7), Referenced by (10), Classifications (7), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetAdaptive writing method for high-density optical recording apparatus and circuit thereof
US 7158461 B1Abstract
1. A recording and/or reproducing apparatus recording and/or reproducing data on a recording medium, comprising:
a discriminator to discriminate a magnitude of a present mark of input data and a magnitude of a leading space of the present mark;
a generator to control generation of a write pulse waveform in which the present mark comprises a first pulse and a last pulse which are determined in accordance with one or more grouping tables and the discriminated magnitudes of the present mark and the leading space, the one or more grouping tables storing width data of first and/or last pulses for the write pulse waveform to be generated varying according to the different stored magnitudes of the present mark of the input data and the leading space such that the generated write pulse waveform is generated without regard for a trailing space of the present mark; and
a driver to drive a light source by converting the write pulse waveform into a current signal in accordance with driving power levels for the write pulse waveform controlled by the generator.
2. The recording and/or reproducing apparatus according to claim 1, wherein the generator includes:
a write waveform controller to generate pulse width data to vary a width of the first and last pulses of the write pulse waveform to be generated in accordance with the discriminated magnitude of the leading space and the discriminated magnitude of the present mark; and
a write pulse generator to generate the write pulse waveform in accordance with the pulse width data.
3. The recording and/or reproducing apparatus according to claim 2, wherein light power for a predetermined one of channels of the write pulse waveform is applied during a period corresponding to a varied width of the first pulse and during a period corresponding to a varied width of the last pulse.
4. The recording and/or reproducing apparatus according to claim 3, wherein a light power for the predetermined channel is a read power or a write power.
5. The recording and/or reproducing apparatus according to claim 1, wherein the generator generates pulse width data by varying a rising edge of the first pulse of the write pulse in accordance with the magnitude of the leading space and the magnitude of the present mark.
6. The recording and/or reproducing apparatus according to claim 1, wherein the one or more grouping tables stores width data of first and/or last pulses for the write pulse waveform to be generated varying according to only the different stored magnitudes of the present marks and the leading spaces such that the generated write pulse waveform is generated without regard for other spaces or marks other than the leading space and the present mark.
7. A recording and/or reproducing apparatus recording and/or reproducing data on a recording medium, comprising:
a discriminator to discriminate a magnitude of a present mark of input data and magnitudes of leading and/or trailing spaces of the present mark;
a generator to control generation of a write pulse waveform in accordance with one or more grouping tables having width data of first and/or last pulses for the write pulse waveform according to the magnitude of the present mark of the input data and the magnitudes of the leading and/or trailing spaces; and
a driver to drive a light source by converting the write pulse waveform into a current signal in accordance with driving power levels for the write pulse waveform,
a write waveform controller to generate pulse width data to vary a width of the first pulse of the write pulse in accordance with the magnitude of the leading space and the magnitude of the present mark and to vary a width of the last pulse of the write pulse in accordance with the magnitude of the present mark and the magnitude of the trailing space; and
a write pulse generator to generate the write pulse waveform in accordance with the pulse width data, and
the write waveform controller comprises a memory in which the pulse width data of the first and/or last pulses for the write pulse waveform are stored, by grouping the magnitude of the present mark and the magnitudes of the leading and/or trailing spaces, into a short pulse group, a middle pulse group or a long pulse group.
8. The recording and/or reproducing apparatus according to claim 7, further comprising a microcomputer to initialize the write waveform controller and control the pulse width data stored in the memory to be updated in accordance with write conditions.
9. The recording and/or reproducing apparatus according to claim 7, wherein the memory stores the pulse width data of the first and/or last pulses for the write pulse waveform depending on whether the input data is in a land track or a groove track.
10. The recording and/or reproducing apparatus according to claim 7, wherein the memory stores the pulse width data of the first and/or last pulses for the write pulse waveform for respective zones on the optical recording medium.
11. The recording and/or reproducing apparatus according to claim 7, wherein the groups of the magnitudes comprise the magnitude of the present mark and the magnitude of the leading space, and the write pulse waveform is generated without regard for the trailing space.
12. The recording and/or reproducing apparatus according to claim 11, wherein the grouping the magnitude of the present mark and the magnitudes of the leading space comprises grouping into a combination of groups selected from the short pulse group, the middle pulse group and the long pulse group.
13. The recording and/or reproducing apparatus according to claim 12, wherein the combination of groups includes the short pulse group and at least one other group selected from the middle pulse group and the long pulse group.
14. A recording and/or reproducing apparatus recording and/or reproducing data on a recording medium, comprising:
a generator to control generation of a write pulse waveform in which the present mark comprises a first pulse and a last pulse formed in accordance with one or more grouping tables having width data of first and/or last pulses for the present mark with the write pulse waveform varying according to magnitudes of the present mark of the input data and magnitudes of leading and/or trailing spaces; and
wherein the generator generates pulse width data by varying a falling edge of the first pulse of the write pulse in accordance with the magnitude of the leading space and the magnitude of the present mark.
15. A recording and/or reproducing apparatus recording and/or reproducing data on a recording medium, comprising:
wherein the generator generates pulse width data by varying a rising edge of the last pulse of the write pulse in accordance with the magnitude of the trailing space and the magnitude of the present mark.
16. A recording and/or reproducing apparatus recording and/or reproducing data on a recording medium, comprising:
a generator to generate an adaptive write pulse, by varying a rising edge of a first pulse of the write pulse and a second pulse of the write pulse in accordance with a magnitude of a space adjacent a present mark and a magnitude of the present mark, based on at least one table storing width data of the first and/or second pulses in a grouping format in which the magnitudes of the present mark and the adjacent space are grouped into corresponding pulse groups grouped according to magnitudes; and
17. The recording and/or reproducing apparatus according to claim 16, wherein, in the grouping format, magnitudes corresponding to the present mark and magnitudes of leading and/or trailing spaces are grouped according to a short pulse group, a middle pulse group and a long pulse group.
18. The recording and/or reproducing apparatus of claim 16, wherein the generator varies the width according to the magnitude of the present mark regardless of a magnitude of a trailing space of the present mark.
19. The recording and/or reproducing apparatus of claim 16, wherein the groups comprise a short pulse group and another pulse group, each member of the another pulse group having magnitudes greater than each member of the short pulse group.
20. An adaptive write pulse generating circuit, the adaptive write pulse being used for writing input data to an optical recording medium, comprising:
a write pulse inputting unit inputting a write pulse, the write pulse including a first pulse, a last pulse and a multi-pulse train;
a generator generating the adaptive write pulse, by varying a rising edge of the first pulse in accordance with a magnitude of a leading space and a magnitude of a present mark and varying the last pulse in accordance with the magnitude of the present mark without regard for a magnitude of a trailing space of the present mark, based on at least one table storing width data of the first and/or second pulses in a leading space and present mark grouping format; and
21. The recording and/or reproducing apparatus according to claim 20, wherein, in the grouping format, magnitudes corresponding to the present mark and magnitudes of leading and/or trailing spaces are grouped according to a short pulse group, a middle pulse group and a long pulse group.
22. A recording and/or reproducing apparatus recording and/or reproducing data on a recording medium, comprising:
a generator to generate an adaptive write pulse in which a present mark is formed using a first pulse and a last pulse determined using a grouping table having width data for pulses of the write pulse waveform organized according to groupings of magnitudes of the present mark of input data and magnitudes of a leading space of the present mark; and
a processor to process data on a recording medium,
wherein the width data comprises rising edge information of the pulse.
23. The recording and/or reproducing apparatus according to claim 22, wherein, in the grouping table, magnitudes corresponding to the present mark and magnitudes of leading and/or trailing spaces are grouped according to a short pulse group, a middle pulse group and a long pulse group.
24. The recording and/or reproducing apparatus of claim 22, wherein the grouping tables groups comprise a short pulse group and another pulse group.
25. A recording and/or reproducing apparatus recording and/or reproducing data on a recording medium, comprising:
a generator to generate an adaptive write pulse in which a present mark is formed using a first pulse and a last pulse determined using one or more grouping tables, the one or more grouping tables storing width data of widths of corresponding first and/or last pulses of the write pulse waveform varying according to corresponding stored magnitudes of the present mark of input data and stored magnitudes of a corresponding space adjacent the present mark by grouping the magnitudes of the present mark and the adjacent space into corresponding pulse groups grouped according to magnitudes; and
a processor to process data on a recording medium using the generated adaptive write pulse.
26. The recording and/or reproducing apparatus according to claim 25, wherein the adaptive write pulse includes a first pulse, a last pulse and a multi-pulse train, and is different in respective zones on the recording medium.
27. The recording and/or reproducing apparatus according to claim 25,
wherein the write pulse waveform is based on whether input data is in a land track or a groove track.
28. The recording and/or reproducing apparatus of claim 25, wherein the grouping tables groups comprise a short pulse group and another pulse group.
29. A recording and/or reproducing apparatus recording and/or reproducing data on a recording medium, comprising:
wherein, in at least one of the one or more grouping tables, magnitudes corresponding to the present mark and magnitudes of leading and/or trailing spaces are grouped according to a short pulse group, a middle pulse group and a long pulse group.
30. The recording and/or reproducing apparatus according to claim 29, wherein the groups of the magnitudes comprises the magnitude of the present mark and the magnitude of the leading space, and the write pulse waveform is generated without regard for the trailing space.
31. A recording and/or reproducing apparatus recording and/or reproducing data on a recording medium, comprising:
a generator to generate an adaptive write pulse using one or more grouping tables having width data of first and/or last pulses of a write pulse waveform according to a magnitude of a present mark of input data and magnitudes of leading and/or trailing spaces of the present mark; and
wherein, in one or more of the one or more grouping tables, magnitudes corresponding to the present mark and magnitudes of leading and/or trailing spaces are grouped according to a short pulse group, a middle pulse group and a long pulse group.
32. A recording and/or reproducing apparatus recording and/or reproducing data on a recording medium, comprising:
a generator to generate an adaptive write pulse in which a present mark is formed using a plurality of pulses, one of the pulses for the present mark having a pulse width which is varied according to magnitudes of the present mark of input data and magnitudes of a leading space of the present mark without regard for a magnitude of a trailing space of the present mark; and
a processor to process data on a recording medium.
33. The recording and/or reproducing apparatus according to claim 32, wherein the pulse width is varied by varying an edge placement of the pulse, including varying a rising edge placement of the pulse based on the magnitude of the present mark and the magnitude of the leading space of the present mark.
34. The recording and/or reproducing apparatus according to claim 33, wherein the generator generates the adaptive write pulse using a predetermined table storing magnitudes of the present mark and the leading space by grouping the magnitudes of the present mark and the leading space into corresponding pulse groups grouped according to magnitudes.
35. The recording and/or reproducing apparatus according to claim 34, wherein the groups comprise a first group and a second group, and the magnitude of each member of the first group is less than the magnitude of each member of the second group.
36. A recording and/or reproducing apparatus recording and/or reproducing data on a recording medium, comprising:
a discriminator to discriminate a magnitude of a present mark of input data and a magnitude of a space adjacent the present mark;
a generator to control generation of a write pulse waveform in which the present mark is formed using first and last pulses determined in accordance with one or more grouping tables and the discriminated magnitudes of the present mark and the adjacent space, the generator comprising a memory in which the pulse width data of the first and/or last pulses for the write pulse waveform are stored, the one or more grouping tables storing pulse width data of first and/or last pulses for the write pulse waveform by grouping the magnitudes of the present mark and the space adjacent the present mark, into a plurality of pulse groups grouped according to the magnitudes; and
37. The recording and/or reproducing apparatus of claim 36, wherein the generator varies the width according to the magnitude of the present mark regardless of a magnitude of a trailing space of the present mark.
38. The recording and/or reproducing apparatus of claim 36, wherein the pulse groups comprise a short pulse group and another pulse group, each member of the another pulse group having magnitudes greater than each member of the short pulse group.
This application is a divisional of application Ser. No. 09/359,128, filed Jul. 23, 1999, which issued as U.S. Pat. No. 6,631,110 on Oct. 7, 2003.
Accordingly, to achieve the first and other objects of the present invention, there is provided a method of writing input data on an optical recording medium using a write pulse whose waveform is comprised of a first pulse, a last pulse and a multi-pulse train, the adaptive writing method including the steps of controlling the waveform of the write pulse in accordance with the magnitude of the present mark of the input data and the magnitudes of the leading and/or trailing spaces to generate an adaptive write pulse, and writing the input data by the adaptive write pulse on the optical recording medium.
Also, the write waveform controller 104 can correct the rising edge of the first pulse of the present mark and the falling edge of the last pulse of the present mark into different values in accordance with externally applied land/groove signals (LAND/GROOVE) indicating whether the input NRZI data is in a land track or a groove track. This is for forming a write waveform in consideration of different optimal light powers depending on the land and groove. There is a difference of 1–2 mW in the optimal light powers between the land and the groove, and this difference may be specifically set or managed by the specifications.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS5418770 *Sep 24, 1991May 23, 1995Hitachi, Ltd.Method of and apparatus for correcting edge interval of pit in optical recording/read-out apparatusUS5490126 *Apr 4, 1994Feb 6, 1996Matsushita Electric Industrial Co., Ltd.Apparatus for recording and reproducing data on a diskUS5499227Jul 15, 1994Mar 12, 1996Nec CorporationInformation recording and reproducing apparatusUS5568461 *Apr 20, 1995Oct 22, 1996Matsushita Electric Industrial Co., Ltd.Optical information recording and reproducing apparatusUS5642343Nov 10, 1992Jun 24, 1997Hitachi, Ltd.Magnetooptic disc apparatus and recording mediumUS5745467 *Oct 8, 1996Apr 28, 1998Matsushita Electric Industrial Co., Ltd.Optical information recording method and apparatusUS6044055 *Sep 17, 1997Mar 28, 2000Sony CorporationPhase change recording apparatus having front and rear pulse changing meansUS6175541 *Aug 24, 1999Jan 16, 2001Matsushita Electric Industrial Co., Ltd.Data recording medium and recording/reproducing apparatus for providing optimum position of mark start and end partsUS6345026 *Dec 17, 1997Feb 5, 2002Matsushita Electric Industrial Co., Ltd.Optical recording method and optical recorderUS6631110 *Jul 23, 1999Oct 7, 2003Samsung Electronics Co., LtdAdaptive writing method for high-density optical recording apparatus and circuit thereofUS6654325 *Aug 9, 1999Nov 25, 2003Hitachi, Ltd.Trial writing method and optical disk system using the sameEP0388897A2Mar 20, 1990Sep 26, 1990Fujitsu LimitedWriting optical disk dataEP0851413A2Dec 17, 1997Jul 1, 1998Hitachi Maxell, Ltd.Information recording apparatusJPH087282A Title not availableJPH0322223A Title not availableJPH0612674A Title not availableJPH0737250A Title not availableJPH0981937A Title not availableJPH05135363A Title not availableJPH06295440A Title not availableJPH06325364A Title not availableJPH07121878A Title not availableJPH07129959A Title not availableJPH07225947A Title not availableJPH08180413A Title not availableJPH08287465A Title not availableJPH10241164A Title not availableKR930000524A Title not availableWO1998028735A1Dec 17, 1997Jul 2, 1998Matsushita Electric Industrial Co., Ltd.Optical recording method and optical recorder* Cited by examinerNon-Patent CitationsReference1Chinese Office Action dated Jun. 20, 2003.2Japanese Office Action for Japanese Application No. 2002-2741 (Related to Present Application).3Japanese Office Action for Japanese Application No. 2002-2749 (Related to Present Application).4Japanese Office Action for Japanese Patent Application No. 2002-002741, dated Apr. 20, 2004 (related to the present application).5Japanese Office Action for Japanese Patent Application No. 2002-002742, dated Apr. 20, 2004 (related to the present application).6Japanese Office Action for Japanese Patent Application No. 2002-002749, dated Apr. 20, 2004 (related to the present application).7Japanese Office Action for Japenese Application No. 2002-319957 (Related to Present Application).Referenced byCiting PatentFiling datePublication dateApplicantTitleUS7301875 *Jul 14, 2004Nov 27, 2007Sony CorporationInformation recording device and information recording methodUS7391696Mar 13, 2007Jun 24, 2008Samsung Electronics Co., Ltd.Adaptive writing method for high-density optical recording apparatus and circuit thereofUS7701828 *Feb 4, 2005Apr 20, 2010Mediatek Inc.Optical recording system and methodUS8305857 *May 13, 2011Nov 6, 2012Samsung Electronics Co., Ltd.Adaptive writing method for high-density optical recording apparatus and circuit thereofUS8315138 *May 13, 2011Nov 20, 2012Samsung Electronics Co., Ltd.Adaptive writing method for high-density optical recording apparatus and circuit thereofUS20050036423 *Jul 14, 2004Feb 17, 2005Sony CorporationInformation recording device and information recording methodUS20060176795 *Feb 4, 2005Aug 10, 2006Mediatek IncorporationOptical recording system and methodUS20070153659 *Mar 13, 2007Jul 5, 2007Samsung Electronics Co., Ltd.Adaptive writing method for high-density optical recording apparatus and circuit thereofUS20110286316 *May 13, 2011Nov 24, 2011Samsung Electronics Co., Ltd.Adaptive writing method for high-density optical recording apparatus and circuit thereofUS20110286317 *May 13, 2011Nov 24, 2011Samsung Electronics Co., Ltd.Adaptive writing method for high-density optical recording apparatus and circuit thereof* Cited by examinerClassifications U.S. Classification369/59.12, G9B/7.028International ClassificationG11B7/0045, G11B7/006Cooperative ClassificationG11B7/00718, G11B7/0062European ClassificationG11B7/006SLegal EventsDateCodeEventDescriptionJun 3, 2010FPAYFee paymentYear of fee payment: 4Jun 30, 2014FPAYFee paymentYear of fee payment: 8RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services