JPS57164442A - Noise reduction device for optical recording - Google Patents

Noise reduction device for optical recording

Info

Publication number
JPS57164442A
JPS57164442A JP4802781A JP4802781A JPS57164442A JP S57164442 A JPS57164442 A JP S57164442A JP 4802781 A JP4802781 A JP 4802781A JP 4802781 A JP4802781 A JP 4802781A JP S57164442 A JPS57164442 A JP S57164442A
Authority
JP
Japan
Prior art keywords
emphasis
circuits
optical recording
input
vra
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.)
Pending
Application number
JP4802781A
Other languages
Japanese (ja)
Inventor
Masao Ooyama
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP4802781A priority Critical patent/JPS57164442A/en
Publication of JPS57164442A publication Critical patent/JPS57164442A/en
Pending 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
    • G11B20/24—Signal processing not specific to the method of recording or reproducing; Circuits therefor for reducing noise

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To stabilize reproducibility, by providing a filter in an input part of each sensor in both an encoder and a decoder, and constituting so that compressing and expanding are not executed by a signal of the high band part and the sensor is operated by a signal component of intermediate and high bands. CONSTITUTION:An input signal is supplied to an optical recording and reproducing machine 23 of a movie film, etc. through a VRA 21 forming an encoder 20, and a pre-emphasis circuit 22, and also it is supplied to a loudspeaker, etc. through a de-emphasis circuit 29 forming a decoder 28, and a VRA 30, when reproducing. In this case, to the pre-emphasis and de-emphasis circuits 22, 29, LPF and waiting circuits 24, 31 are connected, compressing and expanding are not executed in the high band part, sensors 26, 33 provided with overshoot suppressing circuits 25, 32 are operated in the intermediate and high bands, and said input is fed back to the VRAs 21, 30. Accordingly, a noise is reduced as a frequency characteristic being flat as a whole, and the influence by an unstable element is prevented.
JP4802781A 1981-03-31 1981-03-31 Noise reduction device for optical recording Pending JPS57164442A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4802781A JPS57164442A (en) 1981-03-31 1981-03-31 Noise reduction device for optical recording

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4802781A JPS57164442A (en) 1981-03-31 1981-03-31 Noise reduction device for optical recording

Publications (1)

Publication Number Publication Date
JPS57164442A true JPS57164442A (en) 1982-10-09

Family

ID=12791820

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4802781A Pending JPS57164442A (en) 1981-03-31 1981-03-31 Noise reduction device for optical recording

Country Status (1)

Country Link
JP (1) JPS57164442A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015534205A (en) * 2012-09-25 2015-11-26 オラクル・インターナショナル・コーポレイション Precompensated optical tape wobble pattern

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015534205A (en) * 2012-09-25 2015-11-26 オラクル・インターナショナル・コーポレイション Precompensated optical tape wobble pattern

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