JPS55139611A - Recording and reproducing device - Google Patents
Recording and reproducing deviceInfo
- 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
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
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) |
-
1979
- 1979-04-18 JP JP4775979A patent/JPS55139611A/en active Pending
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