JPS5687993A - Color signal processing system - Google Patents

Color signal processing system

Info

Publication number
JPS5687993A
JPS5687993A JP16536179A JP16536179A JPS5687993A JP S5687993 A JPS5687993 A JP S5687993A JP 16536179 A JP16536179 A JP 16536179A JP 16536179 A JP16536179 A JP 16536179A JP S5687993 A JPS5687993 A JP S5687993A
Authority
JP
Japan
Prior art keywords
oscillator
playback
band
pass filter
response
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
JP16536179A
Other languages
Japanese (ja)
Inventor
Norio Meki
Mitsuo Chiba
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP16536179A priority Critical patent/JPS5687993A/en
Publication of JPS5687993A publication Critical patent/JPS5687993A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/87—Regeneration of colour television signals
    • H04N9/89—Time-base error compensation

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To enable to perform the time axis correction of playback color signal accurately, by constituting the variable frequency oscillator forming APC loop with the characteristics of control over a wide variety of bands and stably controlling the center frequency of the said oscillator. CONSTITUTION:To make broad the control range of the APC loop 24 and to improve the response, the band of a low pass filter 24-6 which smoothes the error voltage from a phase comparison circuit 24-3 is taken broader, and the control characteristic over broad band is given to the variable frequency oscillation circuit (VFO) 24-7. For example, it is constituted with a CR oscillator. Further, to avoid the sensitivity to the playback noise and dropout included in the playback synchronizing signal, the band limit is made for the low pass filter 27-5 to delay the response of the AFC loop 27.
JP16536179A 1979-12-18 1979-12-18 Color signal processing system Pending JPS5687993A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16536179A JPS5687993A (en) 1979-12-18 1979-12-18 Color signal processing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16536179A JPS5687993A (en) 1979-12-18 1979-12-18 Color signal processing system

Publications (1)

Publication Number Publication Date
JPS5687993A true JPS5687993A (en) 1981-07-17

Family

ID=15810899

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16536179A Pending JPS5687993A (en) 1979-12-18 1979-12-18 Color signal processing system

Country Status (1)

Country Link
JP (1) JPS5687993A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6076889A (en) * 1983-10-01 1985-05-01 Sony Corp Phase controlling circuit of video signal
JPS61164387A (en) * 1985-01-16 1986-07-25 Matsushita Electric Ind Co Ltd Video signal processing device
JPS62230189A (en) * 1986-03-31 1987-10-08 Toshiba Corp Mislock control circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6076889A (en) * 1983-10-01 1985-05-01 Sony Corp Phase controlling circuit of video signal
JPH0548038B2 (en) * 1983-10-01 1993-07-20 Sony Corp
JPS61164387A (en) * 1985-01-16 1986-07-25 Matsushita Electric Ind Co Ltd Video signal processing device
JPS62230189A (en) * 1986-03-31 1987-10-08 Toshiba Corp Mislock control circuit

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