JPS5779783A - Eraser for video tape recorder - Google Patents

Eraser for video tape recorder

Info

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
Application number
JP55154646A
Other languages
Japanese (ja)
Inventor
Masaaki Tamura
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP55154646A priority Critical patent/JPS5779783A/en
Publication of JPS5779783A publication Critical patent/JPS5779783A/en
Pending legal-status Critical Current

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.
JP55154646A 1980-11-05 1980-11-05 Eraser for video tape recorder Pending JPS5779783A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59191108A (en) * 1983-04-13 1984-10-30 Canon Inc Erasing device

Cited By (2)

* Cited by examiner, † Cited by third party
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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