JPS5779783A - Eraser for video tape recorder - Google Patents
Eraser for video tape recorderInfo
- Publication number
- JPS5779783A JPS5779783A JP55154646A JP15464680A JPS5779783A JP S5779783 A JPS5779783 A JP S5779783A JP 55154646 A JP55154646 A JP 55154646A JP 15464680 A JP15464680 A JP 15464680A JP S5779783 A JPS5779783 A JP S5779783A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- frequency
- output
- circuit
- video
- 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
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
Abstract
PURPOSE:To simplify a circuit and to prevent the occurrence of beat, by eliminating the lower side band of a luminance signal in frequency modulation out of video signals to be recorded by a required value and giving it to an erase rotating head through amplification. CONSTITUTION:A high pass filter 3 which eliminates the lower side components by a required value is connected to an output terminal of a frequency modulation circuit which receives a video input signal and frequency-modulates the luminance signal. An output amplifier 4 which sufficiently amplifies the output signal of the filter 3 to a erasable level of the video tape is connected to the output terminal of the filter 3. The output terminal of the amplifier 4 is connected to an erase rotating head 6 via a rotary transformer 5 to constitute a video tape eraser 1. The chroma signal in the video signal is frequency-modulated at a frequency conversion circuit 7, mixed with an output of a frequency modulation circuit 2 at a mixing circuit 8 and applied to a recording playback head 11 via a recording amplifier 9 and a rotary transformer 10.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55154646A JPS5779783A (en) | 1980-11-05 | 1980-11-05 | Eraser for video tape recorder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55154646A JPS5779783A (en) | 1980-11-05 | 1980-11-05 | Eraser for video tape recorder |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5779783A true JPS5779783A (en) | 1982-05-19 |
Family
ID=15588768
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55154646A Pending JPS5779783A (en) | 1980-11-05 | 1980-11-05 | Eraser for video tape recorder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5779783A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59191108A (en) * | 1983-04-13 | 1984-10-30 | Canon Inc | Erasing device |
-
1980
- 1980-11-05 JP JP55154646A patent/JPS5779783A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59191108A (en) * | 1983-04-13 | 1984-10-30 | Canon Inc | Erasing device |
JPH0471241B2 (en) * | 1983-04-13 | 1992-11-13 | Canon Kk |
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