JPS57129586A - Muting circuit for editing - Google Patents
Muting circuit for editingInfo
- Publication number
- JPS57129586A JPS57129586A JP56014930A JP1493081A JPS57129586A JP S57129586 A JPS57129586 A JP S57129586A JP 56014930 A JP56014930 A JP 56014930A JP 1493081 A JP1493081 A JP 1493081A JP S57129586 A JPS57129586 A JP S57129586A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- muting
- signal
- supplied
- demodulated
- 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
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
- G11B27/022—Electronic editing of analogue information signals, e.g. audio or video signals
- G11B27/024—Electronic editing of analogue information signals, e.g. audio or video signals on tapes
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Television Signal Processing For Recording (AREA)
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
Abstract
PURPOSE:To apply muting to the video signal with a low level for the time until an AFC of a monitor reponds and to reproduce a natural image through a simple circuit, by gradually increasing the DC level for muting from the time wherein the muting release signal is supplied from a muting control circuit. CONSTITUTION:The video signal amplified by an RF amplifier 2 is applied to a separating circuit 3 and an RF output detecting circuit 6 and then demodulated through an FM demodulating circuit 4. The demodulated luminance signal is connected to the reproduced chrominance signal which is extracted by an LPF10 by a mixer 11. The reproduced video signal given from the mixer 11 is supplied to a monitor via a muting circuit 13. At the same time, the demodulated signal given from the circuit 4 is applid to a synchronizing signal separating circuit 7 to separate the synchronizing signal. Then the output given from a synchronism detecting circuit 8 is supplied to a muting control circuit 9 while the synchronizing signal exists, and the output of the RF is applied to the circuit 9 from the circuit 6. The muting DC level is gradually increased from a time point when the muting release signal is supplied to the circuit 13 from the circuit 9, and the muting is applied with a low level to reproduce a natural image.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56014930A JPS57129586A (en) | 1981-02-05 | 1981-02-05 | Muting circuit for editing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56014930A JPS57129586A (en) | 1981-02-05 | 1981-02-05 | Muting circuit for editing |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57129586A true JPS57129586A (en) | 1982-08-11 |
Family
ID=11874678
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56014930A Pending JPS57129586A (en) | 1981-02-05 | 1981-02-05 | Muting circuit for editing |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57129586A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61193570U (en) * | 1985-05-23 | 1986-12-02 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5068510A (en) * | 1973-10-22 | 1975-06-07 |
-
1981
- 1981-02-05 JP JP56014930A patent/JPS57129586A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5068510A (en) * | 1973-10-22 | 1975-06-07 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61193570U (en) * | 1985-05-23 | 1986-12-02 |
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