JPS57179917A - Malfunction preventing device in pcm signal reproducing system - Google Patents

Malfunction preventing device in pcm signal reproducing system

Info

Publication number
JPS57179917A
JPS57179917A JP56062785A JP6278581A JPS57179917A JP S57179917 A JPS57179917 A JP S57179917A JP 56062785 A JP56062785 A JP 56062785A JP 6278581 A JP6278581 A JP 6278581A JP S57179917 A JPS57179917 A JP S57179917A
Authority
JP
Japan
Prior art keywords
terminal
pulse
frame pulse
reproducing system
missing
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
JP56062785A
Other languages
Japanese (ja)
Inventor
Motoichi Kashida
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.)
Akai Electric Co Ltd
Original Assignee
Akai 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 Akai Electric Co Ltd filed Critical Akai Electric Co Ltd
Priority to JP56062785A priority Critical patent/JPS57179917A/en
Publication of JPS57179917A publication Critical patent/JPS57179917A/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
    • G11B20/10527—Audio or video recording; Data buffering arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

PURPOSE:To prevent malfunction of a frame pulse in a pickup PCM signal reproducing system, by substituting an internal CH pulse for the frame pulse if missing pickup of the frame pulse takes place. CONSTITUTION:A T4 is an input terminal of a phase comparator 2A to which a frame pulse as a reference signal input is supplied, and a T5 is similarly an input terminal of an internal CH pulse. A T6 is an input terminal of a frequency divider output as a comparison signal input and a T7 is an output terminal. At a normal operating state, phase comparison between the frame pulse at the terminal T4 and the frequency divider output at the terminal T6 is made, and an oscillation frequency of a voltage controlled oscillator VCO is controlled with the phase comparison output at the terminal T7 for stable operation. Next, even if missing of pickup of the frame pulse takes place due to any external disturbance, a comparator 2A is in set state with the internal CH pulse shown in a position (e) just after the missing to prevent malfunction of the reproducing system.
JP56062785A 1981-04-24 1981-04-24 Malfunction preventing device in pcm signal reproducing system Pending JPS57179917A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56062785A JPS57179917A (en) 1981-04-24 1981-04-24 Malfunction preventing device in pcm signal reproducing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56062785A JPS57179917A (en) 1981-04-24 1981-04-24 Malfunction preventing device in pcm signal reproducing system

Publications (1)

Publication Number Publication Date
JPS57179917A true JPS57179917A (en) 1982-11-05

Family

ID=13210347

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56062785A Pending JPS57179917A (en) 1981-04-24 1981-04-24 Malfunction preventing device in pcm signal reproducing system

Country Status (1)

Country Link
JP (1) JPS57179917A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6086939A (en) * 1983-10-18 1985-05-16 Fujitsu Ltd Clock reproduction system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53118108A (en) * 1977-03-25 1978-10-16 Sony Corp Pcm signal processor
JPS5514513A (en) * 1978-07-14 1980-02-01 Sony Corp Recording and reproducing unit for digital signal

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53118108A (en) * 1977-03-25 1978-10-16 Sony Corp Pcm signal processor
JPS5514513A (en) * 1978-07-14 1980-02-01 Sony Corp Recording and reproducing unit for digital signal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6086939A (en) * 1983-10-18 1985-05-16 Fujitsu Ltd Clock reproduction system
JPH0220187B2 (en) * 1983-10-18 1990-05-08 Fujitsu Ltd

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