JPS55139611A - Recording and reproducing device - Google Patents

Recording and reproducing device

Info

Publication number
JPS55139611A
JPS55139611A JP4775979A JP4775979A JPS55139611A JP S55139611 A JPS55139611 A JP S55139611A JP 4775979 A JP4775979 A JP 4775979A JP 4775979 A JP4775979 A JP 4775979A JP S55139611 A JPS55139611 A JP S55139611A
Authority
JP
Japan
Prior art keywords
supplied
jitters
switches
mixers
modulation noise
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
JP4775979A
Other languages
Japanese (ja)
Inventor
Kenji Kimura
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.)
Olympus Corp
Original Assignee
Olympus Optical 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 Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP4775979A priority Critical patent/JPS55139611A/en
Priority to US06/122,179 priority patent/US4329718A/en
Priority to DE3006374A priority patent/DE3006374C2/en
Publication of JPS55139611A publication Critical patent/JPS55139611A/en
Pending legal-status Critical Current

Links

Landscapes

  • Television Signal Processing For Recording (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)

Abstract

PURPOSE: To make it possible to obtain reproduced pictures of high quality by detecting a modulation noise in an AM component due to the jitters and by mixing the detected modulation noise with a demodulated conversion signal for cancel- lation.
CONSTITUTION: When a recording state is set by closing contacts R-S of alternation switches 41W48 and 12 to supply a video signal to input line 1, converter 2 generates its converted signal, which is supplied to frequency modulators 31W38. Then, FM-modulated signals of respective channels and the fixed-frequency output of oscillator 11 are supplied to magnetic heads 51W58 and 13 by way of switches 41W 48 and 12. Next, contacts P-S of switches 41W48 and 12 are closed to set a reproduction state. As a result, reproduced signals from heads 51W58 are supplied to demodulators 61W68 and then to mixers 71W78. The reproduction output of head 13, on the other hand, is also supplied to demodulator 18 to extract only the jitters, and then polarity-inverted by inverter 19 before being input to mixers 71W78. Consequently, the AM component of the jitters is removed by canceling.
COPYRIGHT: (C)1980,JPO&Japio
JP4775979A 1979-02-20 1979-04-18 Recording and reproducing device Pending JPS55139611A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP4775979A JPS55139611A (en) 1979-04-18 1979-04-18 Recording and reproducing device
US06/122,179 US4329718A (en) 1979-02-20 1980-02-19 Video tape recording and reproducing apparatus with line base correction
DE3006374A DE3006374C2 (en) 1979-02-20 1980-02-20 Magnetic video tape recording and reproducing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4775979A JPS55139611A (en) 1979-04-18 1979-04-18 Recording and reproducing device

Publications (1)

Publication Number Publication Date
JPS55139611A true JPS55139611A (en) 1980-10-31

Family

ID=12784286

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4775979A Pending JPS55139611A (en) 1979-02-20 1979-04-18 Recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS55139611A (en)

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