WO2008090750A1 - 情報再生装置および情報再生方法 - Google Patents
情報再生装置および情報再生方法 Download PDFInfo
- Publication number
- WO2008090750A1 WO2008090750A1 PCT/JP2008/050025 JP2008050025W WO2008090750A1 WO 2008090750 A1 WO2008090750 A1 WO 2008090750A1 JP 2008050025 W JP2008050025 W JP 2008050025W WO 2008090750 A1 WO2008090750 A1 WO 2008090750A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- clock
- synchronization
- outputs
- information reproduction
- output data
- Prior art date
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
- G11B20/10037—A/D conversion, D/A conversion, sampling, slicing and digital quantisation or adjusting parameters thereof
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
- G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
- G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
- G11B20/10055—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter using partial response filtering when writing the signal to the medium or reading it therefrom
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
- G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
- G11B20/10055—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter using partial response filtering when writing the signal to the medium or reading it therefrom
- G11B20/10111—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter using partial response filtering when writing the signal to the medium or reading it therefrom partial response PR(1,2,2,1)
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
- G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
- G11B20/10212—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter compensation for data shift, e.g. pulse-crowding effects
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
- G11B20/10268—Improvement or modification of read or write signals bit detection or demodulation methods
- G11B20/10287—Improvement or modification of read or write signals bit detection or demodulation methods using probabilistic methods, e.g. maximum likelihood detectors
- G11B20/10296—Improvement or modification of read or write signals bit detection or demodulation methods using probabilistic methods, e.g. maximum likelihood detectors using the Viterbi algorithm
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
- G11B20/10305—Improvement or modification of read or write signals signal quality assessment
- G11B20/10398—Improvement or modification of read or write signals signal quality assessment jitter, timing deviations or phase and frequency errors
- G11B20/10425—Improvement or modification of read or write signals signal quality assessment jitter, timing deviations or phase and frequency errors by counting out-of-lock events of a PLL
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
- G11B20/10481—Improvement or modification of read or write signals optimisation methods
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/14—Digital recording or reproducing using self-clocking codes
- G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/14—Digital recording or reproducing using self-clocking codes
- G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
- G11B20/1423—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code
- G11B20/1426—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code conversion to or from block codes or representations thereof
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2537—Optical discs
- G11B2220/2562—DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Probability & Statistics with Applications (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
Abstract
情報再生装置は、アナログデジタル変換手段、等化手段、補間手段、最尤検出手段、PLL手段を具備する。アナログデジタル変換手段は最小ラン長が1のラン長制限符号により情報が記録されている光ディスク媒体から読み出す読み出し信号をデジタル信号に変換し、チャネル周波数のN/M倍の第1クロックに同期して出力する。このとき、Nを2以上の整数、MをN/M>0.5を満たす整数とする。等化手段は第1クロックに同期してデジタル信号をPR特性に等化する。補間手段は等化手段から出力されるN個の入力データに基づいてM個の出力データに変換し、チャネル周波数の1/M倍の第2クロックに同期して出力データを出力する。最尤検出手段は補間手段から出力される出力データに基づいてMビットの検出情報に変換し、第2クロックに同期して検出情報を出力する。PLL手段は第1クロックと第2クロックとを生成する。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/524,072 US8004443B2 (en) | 2007-01-23 | 2008-01-07 | Information readout apparatus and information reproducing method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007-013000 | 2007-01-23 | ||
JP2007013000A JP4222418B2 (ja) | 2007-01-23 | 2007-01-23 | 情報再生装置および情報再生方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008090750A1 true WO2008090750A1 (ja) | 2008-07-31 |
Family
ID=39644325
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2008/050025 WO2008090750A1 (ja) | 2007-01-23 | 2008-01-07 | 情報再生装置および情報再生方法 |
Country Status (3)
Country | Link |
---|---|
US (1) | US8004443B2 (ja) |
JP (1) | JP4222418B2 (ja) |
WO (1) | WO2008090750A1 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011014196A (ja) * | 2009-07-02 | 2011-01-20 | Renesas Electronics Corp | 適応等化器、情報再生装置、及び適応等化方法 |
US9747161B2 (en) * | 2014-10-30 | 2017-08-29 | Fujifilm Corporation | Signal processing device, magnetic information playback device, and signal processing method |
JP7368271B2 (ja) * | 2020-02-27 | 2023-10-24 | 株式会社メガチップス | 通信装置および通信方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001101799A (ja) * | 1999-10-01 | 2001-04-13 | Matsushita Electric Ind Co Ltd | デジタル再生信号処理装置 |
JP2003036612A (ja) * | 2001-07-26 | 2003-02-07 | Matsushita Electric Ind Co Ltd | デジタルデータ再生装置 |
JP2006004465A (ja) * | 2004-06-15 | 2006-01-05 | Hitachi Ltd | 光ディスク装置 |
JP2008010097A (ja) * | 2006-06-30 | 2008-01-17 | Toshiba Corp | 記録媒体再生装置、およびその再生方法 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6721255B1 (en) * | 1998-10-28 | 2004-04-13 | Matsushita Electric Industrial Co., Ltd. | Device and method for recording data to optical disk using recording pulse with corrected edge position |
JP2001184795A (ja) * | 1999-12-24 | 2001-07-06 | Nec Corp | 適応等化器を内蔵した情報検出回路およびこれを用いた光ディスク装置 |
JP2002025200A (ja) * | 2000-06-30 | 2002-01-25 | Sony Corp | 情報再生装置 |
JP3949357B2 (ja) * | 2000-07-13 | 2007-07-25 | 富士通株式会社 | 復調装置 |
-
2007
- 2007-01-23 JP JP2007013000A patent/JP4222418B2/ja not_active Expired - Fee Related
-
2008
- 2008-01-07 US US12/524,072 patent/US8004443B2/en not_active Expired - Fee Related
- 2008-01-07 WO PCT/JP2008/050025 patent/WO2008090750A1/ja active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001101799A (ja) * | 1999-10-01 | 2001-04-13 | Matsushita Electric Ind Co Ltd | デジタル再生信号処理装置 |
JP2003036612A (ja) * | 2001-07-26 | 2003-02-07 | Matsushita Electric Ind Co Ltd | デジタルデータ再生装置 |
JP2006004465A (ja) * | 2004-06-15 | 2006-01-05 | Hitachi Ltd | 光ディスク装置 |
JP2008010097A (ja) * | 2006-06-30 | 2008-01-17 | Toshiba Corp | 記録媒体再生装置、およびその再生方法 |
Also Published As
Publication number | Publication date |
---|---|
US20100054716A1 (en) | 2010-03-04 |
US8004443B2 (en) | 2011-08-23 |
JP2008181583A (ja) | 2008-08-07 |
JP4222418B2 (ja) | 2009-02-12 |
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