JPS5744233A - Recorder and reproducer of digital signal - Google Patents

Recorder and reproducer of digital signal

Info

Publication number
JPS5744233A
JPS5744233A JP11919180A JP11919180A JPS5744233A JP S5744233 A JPS5744233 A JP S5744233A JP 11919180 A JP11919180 A JP 11919180A JP 11919180 A JP11919180 A JP 11919180A JP S5744233 A JPS5744233 A JP S5744233A
Authority
JP
Japan
Prior art keywords
output
pulse duration
correction
amplitude
supplied
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
JP11919180A
Other languages
Japanese (ja)
Other versions
JPS6318263B2 (en
Inventor
Masatoshi Shinpo
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP11919180A priority Critical patent/JPS5744233A/en
Publication of JPS5744233A publication Critical patent/JPS5744233A/en
Publication of JPS6318263B2 publication Critical patent/JPS6318263B2/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
    • G11B20/10—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

PURPOSE:To obtain desired and ideal pulse duration in the reproduction time, by detecting the pulse duration of an MFM modulated output with which an analog signal is digitized and then recorded and reproduced in the recording time and varying both the pulse duration and the amplitude in accordance with each pulse duration. CONSTITUTION:An input 1 expressed in NRZ is modulated by an MFM modulating circuit 71 and supplied to pulse duration detecting circuits 88-90. Thus the pulse duration is detected with periods T, 1.5T and 2T through the circuits 88, 89 and 90, respectively. A detection output of ''H'' level is obtained at an output 21 of an AND gate 82 among the detection outputs of pulse duration T. The output 21 is supplied to monostable multivibrators 73 and 74, and an output after correction by which the pulse duration T is contracted is obtained at an output 25. An output having more increased amplitude is obtained at an output 26, and the each pulse duration T, 1.5T and 2T plus an added output after correction of amplitude are obtained at an output 27 to be used as the input of a laser driving circuit. In such way, a correction is given to ensure a prescribed pulse duration in the reproduction time after carrying out the recording with a correction. As a result, an ideal reproduced waveform can be obtained.
JP11919180A 1980-08-28 1980-08-28 Recorder and reproducer of digital signal Granted JPS5744233A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11919180A JPS5744233A (en) 1980-08-28 1980-08-28 Recorder and reproducer of digital signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11919180A JPS5744233A (en) 1980-08-28 1980-08-28 Recorder and reproducer of digital signal

Publications (2)

Publication Number Publication Date
JPS5744233A true JPS5744233A (en) 1982-03-12
JPS6318263B2 JPS6318263B2 (en) 1988-04-18

Family

ID=14755163

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11919180A Granted JPS5744233A (en) 1980-08-28 1980-08-28 Recorder and reproducer of digital signal

Country Status (1)

Country Link
JP (1) JPS5744233A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58212628A (en) * 1982-06-04 1983-12-10 Sony Corp Disc recording device
JPS6053063A (en) * 1983-07-26 1985-03-26 オ−ガツト・インコ−ポレ−テツド Connecting pin of printed circuit board
EP0141028A2 (en) * 1983-10-25 1985-05-15 BULL HN INFORMATION SYSTEMS ITALIA S.p.A. Digital apparatus for magnetic media data recovery system
JPS6185156U (en) * 1984-11-09 1986-06-04
JPS6325867A (en) * 1986-07-18 1988-02-03 Canon Inc Information recording method
JPS63269321A (en) * 1987-04-28 1988-11-07 Yamaha Corp Optical disk recorder
JPS63281229A (en) * 1987-05-13 1988-11-17 Sharp Corp Optical information recording and reproducing device
JPH01251323A (en) * 1988-03-30 1989-10-06 Aiwa Co Ltd Optical disk reproducing device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102662369B1 (en) * 2022-03-30 2024-05-07 아우토리브 디벨롭먼트 아베 Seat belt apparatus

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58212628A (en) * 1982-06-04 1983-12-10 Sony Corp Disc recording device
JPS6053063A (en) * 1983-07-26 1985-03-26 オ−ガツト・インコ−ポレ−テツド Connecting pin of printed circuit board
EP0141028A2 (en) * 1983-10-25 1985-05-15 BULL HN INFORMATION SYSTEMS ITALIA S.p.A. Digital apparatus for magnetic media data recovery system
JPS6185156U (en) * 1984-11-09 1986-06-04
JPS6325867A (en) * 1986-07-18 1988-02-03 Canon Inc Information recording method
JPS63269321A (en) * 1987-04-28 1988-11-07 Yamaha Corp Optical disk recorder
JPS63281229A (en) * 1987-05-13 1988-11-17 Sharp Corp Optical information recording and reproducing device
JPH01251323A (en) * 1988-03-30 1989-10-06 Aiwa Co Ltd Optical disk reproducing device

Also Published As

Publication number Publication date
JPS6318263B2 (en) 1988-04-18

Similar Documents

Publication Publication Date Title
JPS5733441A (en) Optical information recorder and reproducer
JPS5744233A (en) Recorder and reproducer of digital signal
ATE16651T1 (en) SERVO CIRCUIT USABLE IN PLAYBACK OF DISC-FORM RECORDING CARRIERS WRITTEN WITH PCM SIGNALS.
ES433966A1 (en) Magnetic recording and/or reproducing system
JPS56165910A (en) Recording method of binary signal
JPS648513A (en) Optical disk signal reproducing system
JPS53115209A (en) Magnetic recording method
JPS57200916A (en) Recording and reproducing device for digital signal
KR840000859A (en) Magnetic regeneration device
JPS56159806A (en) Magnetic disc device
JPS56148752A (en) Magnetic tape device
JPS56160179A (en) Recorder and reproducer of voice signal
JPS5532221A (en) Saturation level detector
JPS5644171A (en) Pcm recording and reproducing device
JPS5555409A (en) Signal multiple recording method
JPS5573910A (en) Magnetic recording and reproduction system for digital data
JPS563412A (en) Picture recorder/reproducer
JPS51142221A (en) Information reproducing device
JPS5555407A (en) Recording system of multiple information
JPS6464170A (en) Signal recording and reproducing device
JPS5522232A (en) Digital magnetic recorder/reproducer
JPS5555408A (en) Recording method of multiple information
EP0387804A3 (en) Recording of frequency-multiplex signal on recording medium
JPS6459670A (en) Information signal recorder
JPS5778607A (en) Recording and reproducing system