JPS5760515A - Synchronizing signal protection circuit - Google Patents

Synchronizing signal protection circuit

Info

Publication number
JPS5760515A
JPS5760515A JP55132929A JP13292980A JPS5760515A JP S5760515 A JPS5760515 A JP S5760515A JP 55132929 A JP55132929 A JP 55132929A JP 13292980 A JP13292980 A JP 13292980A JP S5760515 A JPS5760515 A JP S5760515A
Authority
JP
Japan
Prior art keywords
synchronizing signal
synchronizing
detected
detection window
width
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
JP55132929A
Other languages
Japanese (ja)
Inventor
Hiroyuki Kimura
Keizo Nishimura
Masaharu Kobayashi
Takao Arai
Takashi Hoshino
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 JP55132929A priority Critical patent/JPS5760515A/en
Publication of JPS5760515A publication Critical patent/JPS5760515A/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)
  • Optical Recording Or Reproduction (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

PURPOSE:To reduce the synchronizing recovery time, by switching the width of synchronizing detection window depending if the synchronizing signal is detected, in a PCM disc player. CONSTITUTION:When a synchronizing signal is detected at a shift register 3 and a AND gate 3a, the width of synchronizing signal detection window formed with N', M' notation counters 20, 21 is set sufficiently to narrow value. If no synchronizing signal is detected, synchronizing signals can be compensated from the counter 21. At the same time an FF22 is reset, the frequency dividing ratio of the counters 20, 21 is respectively changed with this output, and the width of the synchronizing signal detection window is wider through the change in this frequency dividing ratio. As a result, the synchronizing signal is easily detected, and after the detection of the synchronizing signal, the detection window is again narrower to avoid malfunction due to noise. Thus, the synchronizing restoring time can be reduced.
JP55132929A 1980-09-26 1980-09-26 Synchronizing signal protection circuit Pending JPS5760515A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55132929A JPS5760515A (en) 1980-09-26 1980-09-26 Synchronizing signal protection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55132929A JPS5760515A (en) 1980-09-26 1980-09-26 Synchronizing signal protection circuit

Publications (1)

Publication Number Publication Date
JPS5760515A true JPS5760515A (en) 1982-04-12

Family

ID=15092792

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55132929A Pending JPS5760515A (en) 1980-09-26 1980-09-26 Synchronizing signal protection circuit

Country Status (1)

Country Link
JP (1) JPS5760515A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59104731A (en) * 1982-12-02 1984-06-16 Sanyo Electric Co Ltd Generating circuit of synchronizing circuit
JPS6096033A (en) * 1983-10-31 1985-05-29 Sony Corp System for detecting specific signal
JPS60157773A (en) * 1984-01-27 1985-08-19 Ricoh Co Ltd Synchronizing signal detector
JPS61177679A (en) * 1985-01-31 1986-08-09 Canon Inc Periodic signal detecting system
JPS61287079A (en) * 1985-06-13 1986-12-17 Mitsubishi Electric Corp Digital signal reproducing device
EP0236017A2 (en) * 1986-02-27 1987-09-09 Sony Corporation Synchronizing signal decoding
JPH066336A (en) * 1992-06-17 1994-01-14 Yamaha Corp Synchronizing signal correction method
US7072364B2 (en) 1998-10-20 2006-07-04 Fujitsu Limited Synchronization and setting system for signals received in radio base station

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6052505A (en) * 1983-08-31 1985-03-25 Nippon Steel Corp Manufacture of chromium steel by refining using converter and vacuum decarburization refining furnace

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6052505A (en) * 1983-08-31 1985-03-25 Nippon Steel Corp Manufacture of chromium steel by refining using converter and vacuum decarburization refining furnace

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59104731A (en) * 1982-12-02 1984-06-16 Sanyo Electric Co Ltd Generating circuit of synchronizing circuit
JPS6096033A (en) * 1983-10-31 1985-05-29 Sony Corp System for detecting specific signal
JPS60157773A (en) * 1984-01-27 1985-08-19 Ricoh Co Ltd Synchronizing signal detector
JPS61177679A (en) * 1985-01-31 1986-08-09 Canon Inc Periodic signal detecting system
JPS61287079A (en) * 1985-06-13 1986-12-17 Mitsubishi Electric Corp Digital signal reproducing device
EP0236017A2 (en) * 1986-02-27 1987-09-09 Sony Corporation Synchronizing signal decoding
JPH066336A (en) * 1992-06-17 1994-01-14 Yamaha Corp Synchronizing signal correction method
US7072364B2 (en) 1998-10-20 2006-07-04 Fujitsu Limited Synchronization and setting system for signals received in radio base station

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