JPS56143508A - Error signal detection system - Google Patents

Error signal detection system

Info

Publication number
JPS56143508A
JPS56143508A JP4543180A JP4543180A JPS56143508A JP S56143508 A JPS56143508 A JP S56143508A JP 4543180 A JP4543180 A JP 4543180A JP 4543180 A JP4543180 A JP 4543180A JP S56143508 A JPS56143508 A JP S56143508A
Authority
JP
Japan
Prior art keywords
signal
synchronizing
error
section
error signal
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
JP4543180A
Other languages
Japanese (ja)
Inventor
Koichi Ogawa
Shigeru Arai
Seiya Ogawa
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP4543180A priority Critical patent/JPS56143508A/en
Publication of JPS56143508A publication Critical patent/JPS56143508A/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
    • G11B20/10—Digital recording or reproducing
    • G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
    • 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
    • G11B27/36—Monitoring, i.e. supervising the progress of recording or reproducing

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Television Signal Processing For Recording (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To detect an error signal in a reproduced signal from an optical recording medium accurately and stably, by regarding an error signal, detected in the section of a synchronizing signal, not as an error. CONSTITUTION:When an error signal in a reproduced signal from an optical recording medium is to be detected, an error signal, if detected in the section of a synchronizing signal, is not regarded as an error. For example, a reproduced signal from optical disk 3 is branched into two via amplifier 5; one component is converted into a video signal by demodulating circuit 6 and synchronizing signal section (g) is separated by synchronizing-signal separating circuit 7. The other component is compared with threshold level (d) by comparator 8 to output the waveform that contains detection pulse (e) of the synchronizing signal section and detection pulse (f) corresponding to the error signal. This detection pulse (e) is passed through delay circuit 10 conforming its timing with that of synchronizing signal section (g) from synchronizing-signal separating circuit 7, and then passed through AND circuit 11 to eliminate by a gate detection pulse (e) that corresponds to synchronizing signal section (g).
JP4543180A 1980-04-07 1980-04-07 Error signal detection system Pending JPS56143508A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4543180A JPS56143508A (en) 1980-04-07 1980-04-07 Error signal detection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4543180A JPS56143508A (en) 1980-04-07 1980-04-07 Error signal detection system

Publications (1)

Publication Number Publication Date
JPS56143508A true JPS56143508A (en) 1981-11-09

Family

ID=12719102

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4543180A Pending JPS56143508A (en) 1980-04-07 1980-04-07 Error signal detection system

Country Status (1)

Country Link
JP (1) JPS56143508A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0139757A1 (en) * 1983-03-08 1985-05-08 Sony Corporation Apparatus for reproducing data signal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0139757A1 (en) * 1983-03-08 1985-05-08 Sony Corporation Apparatus for reproducing data signal

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