JPS57106284A - Extracting circuit for synchronizing signal - Google Patents

Extracting circuit for synchronizing signal

Info

Publication number
JPS57106284A
JPS57106284A JP55182494A JP18249480A JPS57106284A JP S57106284 A JPS57106284 A JP S57106284A JP 55182494 A JP55182494 A JP 55182494A JP 18249480 A JP18249480 A JP 18249480A JP S57106284 A JPS57106284 A JP S57106284A
Authority
JP
Japan
Prior art keywords
signal
block
synchronizing signal
samples
synchronizing
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
JP55182494A
Other languages
Japanese (ja)
Inventor
Ryusuke Moriya
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 JP55182494A priority Critical patent/JPS57106284A/en
Publication of JPS57106284A publication Critical patent/JPS57106284A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/93—Regeneration of the television signal or of selected parts thereof
    • H04N5/932—Regeneration of analogue synchronisation signals

Abstract

PURPOSE:To extract the first block synchronizing signal of a field without the influence of mechanical fluctuation. CONSTITUTION:A video signal is subjected to A/D conversion into samples each of which consists of 8 bits, and one block consists of 96 samples. A synchronizing signal consists of 3 samples, and the first block of a field consists of 6 sampled. At a recording time, one sample is converted to 10 bits. At a reproducing time, the bit synchronizing signal is sent to a block synchronizing detecting circuit 5 and is compared with a prescribed pattern by the circuit 5; and when a synchronizing signal is detected, a signal SY1 is obtained, and a counter 7 is preset by this signal to count following bits. When the count value becomes 30, a counter output C0 is issued, and a signal SY2 is obtained from an AND gate 6. When the signal SY2 exists in the time of window pulses, the signal SY2 indicates the first block of the field.
JP55182494A 1980-12-22 1980-12-22 Extracting circuit for synchronizing signal Pending JPS57106284A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55182494A JPS57106284A (en) 1980-12-22 1980-12-22 Extracting circuit for synchronizing signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55182494A JPS57106284A (en) 1980-12-22 1980-12-22 Extracting circuit for synchronizing signal

Publications (1)

Publication Number Publication Date
JPS57106284A true JPS57106284A (en) 1982-07-02

Family

ID=16119262

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55182494A Pending JPS57106284A (en) 1980-12-22 1980-12-22 Extracting circuit for synchronizing signal

Country Status (1)

Country Link
JP (1) JPS57106284A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6039948A (en) * 1983-08-15 1985-03-02 Seiko Epson Corp Timing signal extracting circuit
JPS6113476A (en) * 1984-06-28 1986-01-21 Nippon Telegr & Teleph Corp <Ntt> Synchronous control system of cassette type magnetic tape device
JPS6415485U (en) * 1987-07-16 1989-01-26

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6039948A (en) * 1983-08-15 1985-03-02 Seiko Epson Corp Timing signal extracting circuit
JPH0580850B2 (en) * 1983-08-15 1993-11-10 Seiko Epson Corp
JPS6113476A (en) * 1984-06-28 1986-01-21 Nippon Telegr & Teleph Corp <Ntt> Synchronous control system of cassette type magnetic tape device
JPH0544749B2 (en) * 1984-06-28 1993-07-07 Nippon Telegraph & Telephone
JPS6415485U (en) * 1987-07-16 1989-01-26

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