BR9803984A - Dispositivo para leitura e/ou escrita de/para meios de gravação ótica. - Google Patents
Dispositivo para leitura e/ou escrita de/para meios de gravação ótica.Info
- Publication number
- BR9803984A BR9803984A BR9803984-9A BR9803984A BR9803984A BR 9803984 A BR9803984 A BR 9803984A BR 9803984 A BR9803984 A BR 9803984A BR 9803984 A BR9803984 A BR 9803984A
- Authority
- BR
- Brazil
- Prior art keywords
- writing
- reading
- optical recording
- recording media
- mirrored signal
- Prior art date
Links
Classifications
-
- 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
- G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
- G11B7/08505—Methods for track change, selection or preliminary positioning by moving the head
- G11B7/08541—Methods for track change, selection or preliminary positioning by moving the head involving track counting to determine position
-
- 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
-
- 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
- G11B7/0941—Methods and circuits for servo gain or phase compensation during operation
Landscapes
- Optical Recording Or Reproduction (AREA)
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
Abstract
Patente de Invenção:<B>"DISPOSITIVO PARA LEITURA E/OU ESCRITA DE/ PARA MEIOS DE GRAVAçãO óTICA"<D>. A invenção refere - se a um dispositivo para leitura de e/ou escrita para meios de gravação ótica, que possui um dispositivo de leitura por varredura, cuja saída é ligada à entrada de um dispositivo conversor analógico-para-digital (3), cuja saída é por sua vez ligada à entrada de um dispositiva detector de sinal espelhado (1). O objetivo da invenção consiste em propor um dispositivo deste tipo que é capaz de gerar um sinal espelhado confiável mesmo em freq³ências de cruzamento de pistas relativamente elevadas. Isto é alcançado de acordo com a invenção pelo fato de o dispositivo detector de sinal espelhado (1) possuir pelo menos um elemento (11, 12, 24) que é variável em função de freq³ência. O dispositivo de acordo com a invenção é, em particular, um dispositivo de reprodução de CD's ou DVD's.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19743068 | 1997-09-30 | ||
DE19746990A DE19746990A1 (de) | 1997-09-30 | 1997-10-24 | Gerät zum Lesen und/oder Beschreiben optischer Aufzeichnungsträger |
Publications (2)
Publication Number | Publication Date |
---|---|
BR9803984A true BR9803984A (pt) | 1999-11-16 |
BR9803984B1 BR9803984B1 (pt) | 2010-03-09 |
Family
ID=26040434
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BRPI9803984-9A BR9803984B1 (pt) | 1997-09-30 | 1998-09-29 | dispositivo para leitura e/o escrita para meios de gravação ótica; método para uma formação dependente de frequência de um parámetro constituìdo por um sinal espelhado; e método para identificação do tipo de um meio de gravação ótica. |
Country Status (8)
Country | Link |
---|---|
US (1) | US6154429A (pt) |
EP (1) | EP0908873B1 (pt) |
JP (1) | JPH11203688A (pt) |
CN (1) | CN1264148C (pt) |
BR (1) | BR9803984B1 (pt) |
HK (1) | HK1017938A1 (pt) |
ID (1) | ID20982A (pt) |
SG (1) | SG92617A1 (pt) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11328689A (ja) * | 1998-05-21 | 1999-11-30 | Samsung Electronics Co Ltd | ディスク状記録媒体の再生装置におけるシーク制御方法 |
GB0029120D0 (en) * | 2000-11-29 | 2001-01-10 | Lsi Logic Europ Ltd | Apparatus and method of interrupt detection in an optical disc environment |
KR100421003B1 (ko) * | 2001-03-27 | 2004-03-03 | 삼성전자주식회사 | 미러 신호 조정 장치 |
US20030079161A1 (en) * | 2001-10-22 | 2003-04-24 | Verboom Johannes J. | Optimized data storage system and method for optical storage system |
TWI288402B (en) * | 2003-12-09 | 2007-10-11 | Mediatek Inc | Automatic adjustment device and method for MIRR signal of compact disc drive |
US7684291B2 (en) * | 2006-06-05 | 2010-03-23 | Mediatek Inc. | Method and apparatus for blank detection of an optical disc |
US7796480B2 (en) * | 2006-06-05 | 2010-09-14 | Mediatek Inc. | Apparatus and methods for light spot servo signal detection |
US7724090B2 (en) * | 2006-06-05 | 2010-05-25 | Mediatek Inc. | Loop control apparatus and method thereof |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3619258A1 (de) * | 1986-06-07 | 1987-12-10 | Blaupunkt Werke Gmbh | Compact disc (cd)-spieler |
US5031166A (en) * | 1988-01-25 | 1991-07-09 | Laser Magnetic Storage International Company | Optical disk tracking and seeking systems and specific track formats using discontinuities and circuitry therefor |
JPH01232582A (ja) * | 1988-03-14 | 1989-09-18 | Nec Corp | 情報記録再生装置 |
JP2646130B2 (ja) * | 1989-03-13 | 1997-08-25 | パイオニア株式会社 | トラックジャンプ駆動装置 |
JPH0373422A (ja) * | 1989-05-18 | 1991-03-28 | Nec Corp | 光ディスク装置の和信号処理回路 |
JPH04341936A (ja) * | 1991-05-20 | 1992-11-27 | Toshiba Corp | 記録媒体処理装置 |
JP3003338B2 (ja) * | 1991-10-29 | 2000-01-24 | ソニー株式会社 | トラック横切り検出回路及び再生装置 |
KR100272118B1 (ko) * | 1991-11-06 | 2000-11-15 | 이데이 노부유끼 | 디지탈 서보 제어 회로를 구비한 광디스크 플레이어 및 트래킹 서보 회로 |
JPH087498A (ja) * | 1994-06-17 | 1996-01-12 | Hitachi Ltd | 記録情報再生装置 |
JPH09167354A (ja) * | 1995-12-18 | 1997-06-24 | Nec Corp | 光ディスク装置のトラックカウントパルス整形回路 |
JP3671572B2 (ja) * | 1997-01-10 | 2005-07-13 | ソニー株式会社 | 光ディスク装置 |
-
1998
- 1998-09-16 SG SG9803683A patent/SG92617A1/en unknown
- 1998-09-17 EP EP98117632A patent/EP0908873B1/en not_active Expired - Lifetime
- 1998-09-21 JP JP10283598A patent/JPH11203688A/ja not_active Withdrawn
- 1998-09-21 CN CNB981196675A patent/CN1264148C/zh not_active Expired - Fee Related
- 1998-09-28 US US09/162,436 patent/US6154429A/en not_active Expired - Fee Related
- 1998-09-29 BR BRPI9803984-9A patent/BR9803984B1/pt not_active IP Right Cessation
- 1998-09-29 ID IDP981301A patent/ID20982A/id unknown
-
1999
- 1999-06-02 HK HK99102431A patent/HK1017938A1/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
CN1264148C (zh) | 2006-07-12 |
SG92617A1 (en) | 2002-11-19 |
HK1017938A1 (en) | 1999-12-03 |
ID20982A (id) | 1999-04-01 |
EP0908873A1 (en) | 1999-04-14 |
JPH11203688A (ja) | 1999-07-30 |
CN1213127A (zh) | 1999-04-07 |
BR9803984B1 (pt) | 2010-03-09 |
US6154429A (en) | 2000-11-28 |
EP0908873B1 (en) | 2003-01-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
B06A | Notification to applicant to reply to the report for non-patentability or inadequacy of the application [chapter 6.1 patent gazette] | ||
B09A | Decision: intention to grant [chapter 9.1 patent gazette] | ||
B16A | Patent or certificate of addition of invention granted |
Free format text: PRAZO DE VALIDADE: 10 (DEZ) ANOS CONTADOS A PARTIR DE 09/03/2010, OBSERVADAS AS CONDICOES LEGAIS. |
|
B21F | Lapse acc. art. 78, item iv - on non-payment of the annual fees in time |
Free format text: REFERENTE AS 13A, 14A, 15A, 16A E 17A ANUIDADES. |
|
B24J | Lapse because of non-payment of annual fees (definitively: art 78 iv lpi, resolution 113/2013 art. 12) |
Free format text: EM VIRTUDE DA EXTINCAO PUBLICADA NA RPI 2343 DE 01-12-2015 E CONSIDERANDO AUSENCIA DE MANIFESTACAO DENTRO DOS PRAZOS LEGAIS, INFORMO QUE CABE SER MANTIDA A EXTINCAO DA PATENTE E SEUS CERTIFICADOS, CONFORME O DISPOSTO NO ARTIGO 12, DA RESOLUCAO 113/2013. |