JPS56129489A - Special playback device for magnetic recording and playback device - Google Patents
Special playback device for magnetic recording and playback deviceInfo
- Publication number
- JPS56129489A JPS56129489A JP3229280A JP3229280A JPS56129489A JP S56129489 A JPS56129489 A JP S56129489A JP 3229280 A JP3229280 A JP 3229280A JP 3229280 A JP3229280 A JP 3229280A JP S56129489 A JPS56129489 A JP S56129489A
- Authority
- JP
- Japan
- Prior art keywords
- video signal
- output
- playback
- envelope
- circuit
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/78—Television signal recording using magnetic recording
- H04N5/782—Television signal recording using magnetic recording on tape
- H04N5/783—Adaptations for reproducing at a rate different from the recording rate
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Signal Processing For Recording (AREA)
Abstract
PURPOSE:To enable to obtain the playback video signal having high quality without increasing the mechanical precision of the device, by electrically compensating the decrease in the envelope of playback video signal and production of noise caused at still picture and double speed playback. CONSTITUTION:The video signal playback means consists of two rotating magnetic heads A, B running in a prescribed speed and FM detection circuit 15, and the magnetic tape storing video signal is run in the speed less than twice the prescribed speed to playback the video signal. The video signal from the detection circuit 15 is fed to the one field memory circuit 16, it is stored in one vertical scanning period and introduced with a delay of one vertical scanning period. Further, the output from the heads A, B is fed to the envelope decrease detection circuit 17 to output the detection pulse P1 when the envelope decreases less than a prescribed level. Normally, the output of the memory 16 is output at the output terminal 19 via the switch circuit 18 so that the video signal removing the decrease in the envelope can continuously be output by switching the circuit 18 when the pulse P1 is output.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3229280A JPS56129489A (en) | 1980-03-14 | 1980-03-14 | Special playback device for magnetic recording and playback device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3229280A JPS56129489A (en) | 1980-03-14 | 1980-03-14 | Special playback device for magnetic recording and playback device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56129489A true JPS56129489A (en) | 1981-10-09 |
Family
ID=12354878
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3229280A Pending JPS56129489A (en) | 1980-03-14 | 1980-03-14 | Special playback device for magnetic recording and playback device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56129489A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58104584A (en) * | 1981-12-16 | 1983-06-22 | Trio Kenwood Corp | Video signal recorder and reproducer |
JPS6037890A (en) * | 1983-08-10 | 1985-02-27 | Victor Co Of Japan Ltd | Magnetic reproducing device |
JPS6046681A (en) * | 1983-08-25 | 1985-03-13 | Akai Electric Co Ltd | Noise position detecting method of magnetic video recording and reproducing device |
JPS60117884A (en) * | 1983-11-29 | 1985-06-25 | Mitsubishi Electric Corp | Magnetic picture recording and reproducing device |
JPS62264783A (en) * | 1986-05-12 | 1987-11-17 | Hitachi Ltd | Magnetic recording and reproducing device |
-
1980
- 1980-03-14 JP JP3229280A patent/JPS56129489A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58104584A (en) * | 1981-12-16 | 1983-06-22 | Trio Kenwood Corp | Video signal recorder and reproducer |
JPS6037890A (en) * | 1983-08-10 | 1985-02-27 | Victor Co Of Japan Ltd | Magnetic reproducing device |
JPS6046681A (en) * | 1983-08-25 | 1985-03-13 | Akai Electric Co Ltd | Noise position detecting method of magnetic video recording and reproducing device |
JPS60117884A (en) * | 1983-11-29 | 1985-06-25 | Mitsubishi Electric Corp | Magnetic picture recording and reproducing device |
JPS62264783A (en) * | 1986-05-12 | 1987-11-17 | Hitachi Ltd | Magnetic recording and reproducing device |
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