JP4115278B2 - 同期変数を生成する方法 - Google Patents
同期変数を生成する方法 Download PDFInfo
- Publication number
- JP4115278B2 JP4115278B2 JP2002563124A JP2002563124A JP4115278B2 JP 4115278 B2 JP4115278 B2 JP 4115278B2 JP 2002563124 A JP2002563124 A JP 2002563124A JP 2002563124 A JP2002563124 A JP 2002563124A JP 4115278 B2 JP4115278 B2 JP 4115278B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- approximate value
- value
- phase
- approximate
- 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.)
- Expired - Fee Related
Links
- 230000003287 optical effect Effects 0.000 claims description 7
- 230000000737 periodic effect Effects 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 description 5
- 230000001360 synchronised effect Effects 0.000 description 5
- 230000006870 function Effects 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 2
- 238000010200 validation analysis Methods 0.000 description 2
- WNEODWDFDXWOLU-QHCPKHFHSA-N 3-[3-(hydroxymethyl)-4-[1-methyl-5-[[5-[(2s)-2-methyl-4-(oxetan-3-yl)piperazin-1-yl]pyridin-2-yl]amino]-6-oxopyridin-3-yl]pyridin-2-yl]-7,7-dimethyl-1,2,6,8-tetrahydrocyclopenta[3,4]pyrrolo[3,5-b]pyrazin-4-one Chemical compound C([C@@H](N(CC1)C=2C=NC(NC=3C(N(C)C=C(C=3)C=3C(=C(N4C(C5=CC=6CC(C)(C)CC=6N5CC4)=O)N=CC=3)CO)=O)=CC=2)C)N1C1COC1 WNEODWDFDXWOLU-QHCPKHFHSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0901—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following only
- G11B7/0906—Differential phase difference systems
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Optical Recording Or Reproduction (AREA)
Description
・前記同期変数の第1概算値WS0を求め、
・前記第1概算値に近い他の概算値を求め、
・前記概算値のそれぞれについて誤差を計算し、
・最適の概算値を同期変数とする。
・err_p1=(B*Ψ)-(C*ΔΨ* (WS0+1))
・err_m1=(B*Ψ)-(C*ΔΨ* (WS0−1))
一形態では、同期変数WCSは、最小の誤差を生成する概算値である。
・前記第1概算値に近い他の概算値を求める手段と、
・前記概算値のそれぞれについて誤差を計算する手段と、
・最良の概算値を同期変数にする手段と、を備える装置。
・所定のしきい値、レベルが最下位より下のいわゆる最小サンプル、レベルが最上位より上のいわゆる最大サンプル、に対するそれぞれの入射信号の推移を検知する検知ステージ。
・err_0=(B*Ψ)-(C*ΔΨ* WS0)
・err_p1=(B*Ψ)-(C*ΔΨ* (WS0+1))
・err_m1=(B*Ψ)-(C*ΔΨ* (WS0−1))
となる。なお、BおよびCは定数である。
・err_0が(err_0、err_p1、err_m1)のうち最小であれば、WCS=WS0。
2-7 モジュール
WSC 同期変数
WP1,WP2 クロック信号
Claims (5)
- 第1のクロック信号WP1および位相変化信号ΔΨから、第2のクロック信号WP2のための同期変数WCSを生成する装置であって、
前記第1のクロック信号WP1の周期信号Pwp1および前記位相変化信号ΔΨを受信する手段と、
前記周期信号Pwp1および前記位相変化信号ΔΨに基づいて算出された位相Ψと、前記第2のクロック信号WP2の周期について予め求められた該周期の概算値Pwpとに基づいて、前記同期変数の第1の概算値WS0を算出する手段であって、Aを定数として、WS0=Ψ*Pwp / Aの式から該第1の概算値WS0を算出する手段と、
前記第1の概算値に近い第2および第3の概算値を算出する手段であって、該第2の概算値WSp1を、WSp1=WS0+1によって算出し、該第3の概算値WSm1を、WSm1=WS0−1によって算出する、手段と、
前記第1から第3の概算値のそれぞれについて、誤差を計算する手段であって、該第1の概算値に対応する誤差 err_0 は、 err_0 =( B* Ψ) - ( C* ΔΨ * WS 0 )により算出され、該第2の概算値に対応する誤差 err_p1 は、 err_p1 =( B* Ψ) - ( C* ΔΨ * ( WS 0 +1))により算出され、該第3の概算値に対応する誤差 err_m1 は、 err_m1 =( B* Ψ) - ( C* ΔΨ * ( WS 0 −1))により算出され、 B および C は定数である、手段と、
前記第1から第3の概算値のうち、最小の前記誤差に対応する概算値を、前記同期変数として得る手段と、
を備える装置。 - さらに、前記位相Ψの前回値に前記位相変化信号ΔΨを加算し、該加算により得た値に対し、前記第1のクロック信号WP1の周期Pwp1の法をとることにより、前記位相Ψの今回値を算出する手段を備え、
前記第1の概算値WS0は、該位相Ψの今回値に基づいて算出される、
請求項1に記載の装置。 - 前記Aは2nであり、該nは、予め決められた定数である、
請求項1に記載の装置。 - 請求項1から3のいずれかに記載の装置を含む集積回路。
- デジタルディスクリーダであって、
入射光ビームを発する手段、および、ディスクでの該光ビームの反射を検知する複数の光検知器を有する光ヘッドと、
前記複数の光検知器からの信号を、2つの該光検知器ずつ加算し、2つのサンプリングされた入射信号を提供する加算手段と、
前記2つのサンプリングされた入射信号の位相差を、前記位相変化信号ΔΨとして受信する前記請求項1に記載の装置と、を備える、
デジタルディスクリーダ。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0101434A FR2820521B1 (fr) | 2001-02-02 | 2001-02-02 | Procede et dispositif de generation d'une variable de synchronisation, circuit integre et lecteur de disque numerique correspondants |
PCT/FR2002/000358 WO2002063444A1 (fr) | 2001-02-02 | 2002-01-30 | Procede et dispositif de generation d'une variable de synchronisation, circuit integre et lecteur de disque numerique correspondants |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2004527823A JP2004527823A (ja) | 2004-09-09 |
JP2004527823A5 JP2004527823A5 (ja) | 2005-12-22 |
JP4115278B2 true JP4115278B2 (ja) | 2008-07-09 |
Family
ID=8859558
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2002563124A Expired - Fee Related JP4115278B2 (ja) | 2001-02-02 | 2002-01-30 | 同期変数を生成する方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US7219297B2 (ja) |
EP (1) | EP1356364A1 (ja) |
JP (1) | JP4115278B2 (ja) |
FR (1) | FR2820521B1 (ja) |
WO (1) | WO2002063444A1 (ja) |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5184091A (en) * | 1991-06-04 | 1993-02-02 | Zenith Electronics Corporation | Circuit for phase locking an oscillator within any one of a plurality of frequency ranges |
JP3285941B2 (ja) * | 1992-07-31 | 2002-05-27 | キヤノン株式会社 | 色処理方法、色処理装置、及びカラー画像処理システム |
US5295128A (en) * | 1992-10-28 | 1994-03-15 | International Business Machines Corporation | Clock controller employing a discrete time control loop method for clocking data in an asynchronous channel |
US5914953A (en) * | 1992-12-17 | 1999-06-22 | Tandem Computers, Inc. | Network message routing using routing table information and supplemental enable information for deadlock prevention |
US5570397A (en) * | 1993-12-23 | 1996-10-29 | Unisys Corporation | Redundant synchronized clock controller |
US5642243A (en) * | 1994-09-27 | 1997-06-24 | Cirrus Logic, Inc. | Timing recovery frequency error detector for sampled amplitude magnetic recording |
US6430125B1 (en) * | 1996-07-03 | 2002-08-06 | Zen Research (Ireland), Ltd. | Methods and apparatus for detecting and correcting magnification error in a multi-beam optical disk drive |
JP3647047B2 (ja) * | 1996-07-22 | 2005-05-11 | シーゲイト テクノロジー エルエルシー | 位相検出推定器 |
US6189076B1 (en) * | 1997-11-14 | 2001-02-13 | Lucent Technologies, Inc. | Shared synchronous memory with a switching circuit controlled by an arbiter and method for glitch free switching of a clock signal |
FR2792103B1 (fr) * | 1999-03-16 | 2001-11-09 | St Microelectronics Sa | Procede et dispositif d'asservissement d'un faisceau optique incident sur une piste d'un support mobile d'informations, en particulier un disque numerique |
FR2797121B1 (fr) * | 1999-07-30 | 2001-10-12 | St Microelectronics Sa | Dispositif de synchronisation d'un evenement de reference d'un signal analogique sur une horloge |
US6535946B1 (en) * | 2000-01-04 | 2003-03-18 | National Semiconductor Corporation | Low-latency circuit for synchronizing data transfers between clock domains derived from a common clock |
US6810483B2 (en) * | 2001-01-25 | 2004-10-26 | Synopsys, Inc. | Synchronizing data and function opcodes between an application layer having a first clock speed and a circuit having a slower clock speed |
US6983032B2 (en) * | 2001-08-28 | 2006-01-03 | Texas Instruments Incorporated | Digital timing recovery method for communication receivers |
-
2001
- 2001-02-02 FR FR0101434A patent/FR2820521B1/fr not_active Expired - Fee Related
-
2002
- 2002-01-30 JP JP2002563124A patent/JP4115278B2/ja not_active Expired - Fee Related
- 2002-01-30 US US10/470,441 patent/US7219297B2/en not_active Expired - Lifetime
- 2002-01-30 EP EP02701350A patent/EP1356364A1/fr not_active Withdrawn
- 2002-01-30 WO PCT/FR2002/000358 patent/WO2002063444A1/fr active Application Filing
Also Published As
Publication number | Publication date |
---|---|
EP1356364A1 (fr) | 2003-10-29 |
JP2004527823A (ja) | 2004-09-09 |
FR2820521B1 (fr) | 2003-04-25 |
FR2820521A1 (fr) | 2002-08-09 |
US7219297B2 (en) | 2007-05-15 |
WO2002063444A1 (fr) | 2002-08-15 |
US20040075476A1 (en) | 2004-04-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR20060017788A (ko) | Dsp-기반의 데이터 복구 | |
JP3218368B2 (ja) | データ再生装置 | |
US7239583B2 (en) | Tracking error detection apparatus | |
JP2004039117A (ja) | 情報記録媒体、情報記録装置及び情報再生装置 | |
JP4115278B2 (ja) | 同期変数を生成する方法 | |
US7289399B2 (en) | Tracking error detection apparatus including reduction in false tracking error detection during phase error detection | |
US8000193B1 (en) | Timing recovery for optical disc drive high frequency modulation | |
US20050219971A1 (en) | Method and apparatus for recovering rfzc signal to correct phase | |
NL1020242C2 (nl) | Inrichting en werkwijze voor het genereren van een RF signaal en stuursignalen in een systeem met optische schijf. | |
US20060098549A1 (en) | Optical disk apparatus and optical disk evaluation method | |
EP1089203A1 (fr) | Procédé et dispositif d'extraction de données binaires véhiculées par un signal incident, en particulier un signal issu d'un disque numérique | |
JP3149455B2 (ja) | 情報記録装置、情報再生装置及び情報記録方法 | |
JP3927549B2 (ja) | トラッキング誤差検出装置 | |
US20060285467A1 (en) | Optical disk apparatus and method of evaluating optical disks | |
JP2004319072A (ja) | トラッキング誤差検出装置 | |
JP4244982B2 (ja) | 復調装置 | |
JP4816399B2 (ja) | 光ディスク装置 | |
JP5173491B2 (ja) | 信号処理装置 | |
CN1573972A (zh) | 光盘装置和光盘处理方法 | |
KR20040014203A (ko) | 워블 신호 검출 방법 | |
KR100808034B1 (ko) | 디스크 재생 장치 및 방법 | |
JP4343924B2 (ja) | トラッキング誤差検出装置 | |
JP2005339710A (ja) | 位相差検出方法・情報記録/再生媒体・位相検出回路・情報再生装置 | |
JP2009070490A (ja) | ピークレベル検出器、ピークレベル検出部、及び、2値化信号生成回路 | |
JPH0729330A (ja) | クロストラック数検知装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20050112 |
|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20050112 |
|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20070706 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20070717 |
|
A601 | Written request for extension of time |
Free format text: JAPANESE INTERMEDIATE CODE: A601 Effective date: 20071009 |
|
A602 | Written permission of extension of time |
Free format text: JAPANESE INTERMEDIATE CODE: A602 Effective date: 20071016 |
|
A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20080116 |
|
A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20050112 Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20080116 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20080325 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20080415 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110425 Year of fee payment: 3 |
|
R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110425 Year of fee payment: 3 |
|
LAPS | Cancellation because of no payment of annual fees |