JPS57152281A - Energy diffusion signal removing circuit - Google Patents

Energy diffusion signal removing circuit

Info

Publication number
JPS57152281A
JPS57152281A JP3660181A JP3660181A JPS57152281A JP S57152281 A JPS57152281 A JP S57152281A JP 3660181 A JP3660181 A JP 3660181A JP 3660181 A JP3660181 A JP 3660181A JP S57152281 A JPS57152281 A JP S57152281A
Authority
JP
Japan
Prior art keywords
signal
circuit
diffusion
diffusion signal
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
JP3660181A
Other languages
Japanese (ja)
Inventor
Takao Shinkawa
Chuichi Sodeyama
Shigeo Matsuura
Masaki Noda
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 JP3660181A priority Critical patent/JPS57152281A/en
Publication of JPS57152281A publication Critical patent/JPS57152281A/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
    • H04N5/04—Synchronising
    • H04N5/08—Separation of synchronising signals from picture signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Synchronizing For Television (AREA)

Abstract

PURPOSE:To obtain sag-free TV signals from which a diffusion signal is removed by subtracting the diffusion signal reproduced by sampling a TV signal from the TV signal superposing the diffusion signal. CONSTITUTION:A TV signal superposing an inputted energy diffusion signal is branched and inputted to clamping circuits 7, 8. A synchronizing pulse signal from which the diffusion signal and a sag are removed is obtained by using a diode clamping circuit using a capacitor with small capacity for the circuit 8 and selecting a cutting level of a synchronizing separation circuit 9, and the signal is used as a gate signal for a sample holding circuit 11. A signal superposing the diffusion signal is obtained by using a diode clamping circuit using a capacitor with large capacity for the circuit 7. A diffusion signal is obtained by gating the superposed signal by a synchronizing signal from the circuit 9 in the circuit 11 and then holding signal until the next synchronizing signal. The diffusion signal waveform is subtracted from the output of the circuit 7 by a subtraction circuit 10.
JP3660181A 1981-03-16 1981-03-16 Energy diffusion signal removing circuit Pending JPS57152281A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3660181A JPS57152281A (en) 1981-03-16 1981-03-16 Energy diffusion signal removing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3660181A JPS57152281A (en) 1981-03-16 1981-03-16 Energy diffusion signal removing circuit

Publications (1)

Publication Number Publication Date
JPS57152281A true JPS57152281A (en) 1982-09-20

Family

ID=12474309

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3660181A Pending JPS57152281A (en) 1981-03-16 1981-03-16 Energy diffusion signal removing circuit

Country Status (1)

Country Link
JP (1) JPS57152281A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60250793A (en) * 1984-05-28 1985-12-11 Nippon Hoso Kyokai <Nhk> Energy diffusing system
JPS6251885U (en) * 1985-09-19 1987-03-31

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4830813A (en) * 1971-08-24 1973-04-23
JPS555552A (en) * 1978-06-28 1980-01-16 Matsushita Electric Ind Co Ltd Dc reproducing circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4830813A (en) * 1971-08-24 1973-04-23
JPS555552A (en) * 1978-06-28 1980-01-16 Matsushita Electric Ind Co Ltd Dc reproducing circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60250793A (en) * 1984-05-28 1985-12-11 Nippon Hoso Kyokai <Nhk> Energy diffusing system
JPH0462513B2 (en) * 1984-05-28 1992-10-06 Japan Broadcasting Corp
JPS6251885U (en) * 1985-09-19 1987-03-31

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