JPS5587349A - Record/reproduction method - Google Patents

Record/reproduction method

Info

Publication number
JPS5587349A
JPS5587349A JP15746278A JP15746278A JPS5587349A JP S5587349 A JPS5587349 A JP S5587349A JP 15746278 A JP15746278 A JP 15746278A JP 15746278 A JP15746278 A JP 15746278A JP S5587349 A JPS5587349 A JP S5587349A
Authority
JP
Japan
Prior art keywords
signal
reproduction
light beam
recording
pilot signals
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.)
Granted
Application number
JP15746278A
Other languages
Japanese (ja)
Other versions
JPS6142339B2 (en
Inventor
Masanori Ogino
Toru Fujishima
Jun Matsumoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP15746278A priority Critical patent/JPS5587349A/en
Publication of JPS5587349A publication Critical patent/JPS5587349A/en
Priority to US06/363,147 priority patent/US4416002A/en
Publication of JPS6142339B2 publication Critical patent/JPS6142339B2/ja
Granted legal-status Critical Current

Links

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
    • G11B20/02—Analogue recording or reproducing
    • G11B20/06—Angle-modulation recording or reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/02—Driving or moving of heads
    • G11B21/08—Track changing or selecting during transducing operation
    • G11B21/081—Access to indexed tracks or parts of continuous track
    • G11B21/083—Access to indexed tracks or parts of continuous track on discs
    • G11B21/085—Access to indexed tracks or parts of continuous track on discs with track following of accessed part
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/02—Driving or moving of heads
    • G11B21/10—Track finding or aligning by moving the head ; Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. track following
    • G11B21/106—Track finding or aligning by moving the head ; Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. track following on disks
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/005—Reproducing at a different information rate from the information rate of recording
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
    • G11B27/022—Electronic editing of analogue information signals, e.g. audio or video signals
    • G11B27/026—Electronic editing of analogue information signals, e.g. audio or video signals on discs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/102—Programmed access in sequence to addressed parts of tracks of operating record carriers
    • G11B27/105—Programmed access in sequence to addressed parts of tracks of operating record carriers of operating discs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/24—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by sensing features on the record carrier other than the transducing track ; sensing signals or marks recorded by another method than the main recording
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
    • G11B27/30—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording
    • 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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • 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
    • 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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Moving Of Head For Track Selection And Changing (AREA)
  • Moving Of The Head To Find And Align With The Track (AREA)

Abstract

PURPOSE:To realize the high-density recording and reproduction by carrying out the recording and reproduction with insertion of the pilot signals or the frequency region different with every adjacent tracks into the main signal bit row for the recording and reproduction and thus realizing the recording to the disk without grooves or the like via one piece of the light beam. CONSTITUTION:Gate 11 and switch 9 are controlled via input switch pluse 8, and adder 12 generates the composite pilot signals obtained by piling the pilot signals of different frequency regions and given from switch 9 onto the frequency signals which pass through gate 11 with every turning cycle of the disk. This composite signal is then added to the main signal underwent the FM modulation at adder 13 to be turned into the signal in which the pilot signal of different frequency regions with every adjacent track is added into the main signal bit row. Accordingly, the light beam exclusive for the pilot signal becomes unnecessary with use of the light beam which is modulated by the signal obtained above. And thus the high-density recording becomes possible for the disk with no groove via one piece of light beam. At the same time, the before- and after-pass states of the track can be decided by the pilot signals featuring different frequency regions with every adjacent track at the reproduction, thus ensuring the simple and assured tracking.
JP15746278A 1978-04-10 1978-12-22 Record/reproduction method Granted JPS5587349A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP15746278A JPS5587349A (en) 1978-12-22 1978-12-22 Record/reproduction method
US06/363,147 US4416002A (en) 1978-04-10 1982-03-29 Method and apparatus for high-density recording and reproduction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15746278A JPS5587349A (en) 1978-12-22 1978-12-22 Record/reproduction method

Publications (2)

Publication Number Publication Date
JPS5587349A true JPS5587349A (en) 1980-07-02
JPS6142339B2 JPS6142339B2 (en) 1986-09-20

Family

ID=15650181

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15746278A Granted JPS5587349A (en) 1978-04-10 1978-12-22 Record/reproduction method

Country Status (1)

Country Link
JP (1) JPS5587349A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2496953A1 (en) * 1980-12-22 1982-06-25 Victor Company Of Japan APPARATUS FOR REPRODUCING A ROTATING RECORDING MEDIUM

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0535005Y2 (en) * 1989-01-09 1993-09-06
EP3816057A4 (en) 2018-06-29 2022-03-23 Shibuya Corporation Heat-shrinking device and heat-shrinking method for heat shrinkable label

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5046429A (en) * 1973-08-31 1975-04-25
JPS53116120A (en) * 1977-03-16 1978-10-11 Philips Nv Method and device for controlling position of writing or reading head
JPS53125816A (en) * 1977-04-09 1978-11-02 Victor Co Of Japan Ltd Recording system for information recorded medium disc

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5046429A (en) * 1973-08-31 1975-04-25
JPS53116120A (en) * 1977-03-16 1978-10-11 Philips Nv Method and device for controlling position of writing or reading head
JPS53125816A (en) * 1977-04-09 1978-11-02 Victor Co Of Japan Ltd Recording system for information recorded medium disc

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2496953A1 (en) * 1980-12-22 1982-06-25 Victor Company Of Japan APPARATUS FOR REPRODUCING A ROTATING RECORDING MEDIUM

Also Published As

Publication number Publication date
JPS6142339B2 (en) 1986-09-20

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