JPS5532224A - Pcm signal demodulator - Google Patents

Pcm signal demodulator

Info

Publication number
JPS5532224A
JPS5532224A JP10350378A JP10350378A JPS5532224A JP S5532224 A JPS5532224 A JP S5532224A JP 10350378 A JP10350378 A JP 10350378A JP 10350378 A JP10350378 A JP 10350378A JP S5532224 A JPS5532224 A JP S5532224A
Authority
JP
Japan
Prior art keywords
pulse
fixed length
signal
synchronizing signal
counter
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
JP10350378A
Other languages
Japanese (ja)
Other versions
JPS6123590B2 (en
Inventor
Kentaro Odaka
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP10350378A priority Critical patent/JPS5532224A/en
Publication of JPS5532224A publication Critical patent/JPS5532224A/en
Publication of JPS6123590B2 publication Critical patent/JPS6123590B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Rotational Drive Of Disk (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

PURPOSE: To prevent sampling of a synchronizing signal from being impossible by detecting the sampling of the synchronizing signal inserted, fixed length by fixed length, into PCM data in regeneration and then by widening the width of window pulses when in improper condition.
CONSTITUTION: Once equivalent horizontal synchronizing signal EHD formed by dividing regenerated clock pulses is supplied, period test circuit 44 generates window pulse Pt of fixed width via counter 43 corresponding to the detection of regenerated horizontal synchronizing signal PHD inserted, fixed length by fixed length, into PCM data so as to control the closing period of AND gate 46, thereby generating synchronizing pulses Pr synchronizing with signal PHD. Counter 43 is reset by this pulse Pr. If signal PHD is absent due to a dropout, etc., no pulse Pr is generated and counter 43 is not reset, so that circuit 44 will generate pulse Pt of longer pulse width on detecting it. Therefore, pulse Pr is generated as to signal PHD out of synchronism right after the absence, so that the following step out can be prevented.
COPYRIGHT: (C)1980,JPO&Japio
JP10350378A 1978-08-25 1978-08-25 Pcm signal demodulator Granted JPS5532224A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10350378A JPS5532224A (en) 1978-08-25 1978-08-25 Pcm signal demodulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10350378A JPS5532224A (en) 1978-08-25 1978-08-25 Pcm signal demodulator

Publications (2)

Publication Number Publication Date
JPS5532224A true JPS5532224A (en) 1980-03-06
JPS6123590B2 JPS6123590B2 (en) 1986-06-06

Family

ID=14355774

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10350378A Granted JPS5532224A (en) 1978-08-25 1978-08-25 Pcm signal demodulator

Country Status (1)

Country Link
JP (1) JPS5532224A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5760514A (en) * 1980-09-26 1982-04-12 Hitachi Ltd Synchronizing signal protection circuit
JPS59104731A (en) * 1982-12-02 1984-06-16 Sanyo Electric Co Ltd Generating circuit of synchronizing circuit
JPS60245334A (en) * 1984-05-18 1985-12-05 Matsushita Electric Ind Co Ltd Digital signal regenerating device
JPS6266469A (en) * 1985-09-19 1987-03-25 Nippon Gakki Seizo Kk Synchronizing signal reproducing circuit
JPS62114158A (en) * 1985-11-14 1987-05-25 Teac Co Disc device
WO1995012273A1 (en) * 1993-10-26 1995-05-04 Gennum Corporation Self-adjusting window circuit with timing control

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0511432Y2 (en) * 1987-06-17 1993-03-22
JPH02110790U (en) * 1989-02-22 1990-09-05

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5760514A (en) * 1980-09-26 1982-04-12 Hitachi Ltd Synchronizing signal protection circuit
JPH0470712B2 (en) * 1980-09-26 1992-11-11 Hitachi Ltd
JPS59104731A (en) * 1982-12-02 1984-06-16 Sanyo Electric Co Ltd Generating circuit of synchronizing circuit
JPS60245334A (en) * 1984-05-18 1985-12-05 Matsushita Electric Ind Co Ltd Digital signal regenerating device
JPH0431213B2 (en) * 1984-05-18 1992-05-25
JPS6266469A (en) * 1985-09-19 1987-03-25 Nippon Gakki Seizo Kk Synchronizing signal reproducing circuit
JPS62114158A (en) * 1985-11-14 1987-05-25 Teac Co Disc device
JPH0352657B2 (en) * 1985-11-14 1991-08-12 Teac Corp
WO1995012273A1 (en) * 1993-10-26 1995-05-04 Gennum Corporation Self-adjusting window circuit with timing control

Also Published As

Publication number Publication date
JPS6123590B2 (en) 1986-06-06

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