JPS5378819A - Recording system for tv signals - Google Patents

Recording system for tv signals

Info

Publication number
JPS5378819A
JPS5378819A JP15535276A JP15535276A JPS5378819A JP S5378819 A JPS5378819 A JP S5378819A JP 15535276 A JP15535276 A JP 15535276A JP 15535276 A JP15535276 A JP 15535276A JP S5378819 A JPS5378819 A JP S5378819A
Authority
JP
Japan
Prior art keywords
signals
recording system
video tape
recording
reprint
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
JP15535276A
Other languages
Japanese (ja)
Inventor
Kenichi Hasegawa
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP15535276A priority Critical patent/JPS5378819A/en
Publication of JPS5378819A publication Critical patent/JPS5378819A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

PURPOSE:To make the recording operation of a video tape impossible to prevent the reprint of the same by recording the video tape such that the back porch is biased to a white level.
JP15535276A 1976-12-22 1976-12-22 Recording system for tv signals Pending JPS5378819A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15535276A JPS5378819A (en) 1976-12-22 1976-12-22 Recording system for tv signals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15535276A JPS5378819A (en) 1976-12-22 1976-12-22 Recording system for tv signals

Publications (1)

Publication Number Publication Date
JPS5378819A true JPS5378819A (en) 1978-07-12

Family

ID=15604010

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15535276A Pending JPS5378819A (en) 1976-12-22 1976-12-22 Recording system for tv signals

Country Status (1)

Country Link
JP (1) JPS5378819A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6486683A (en) * 1987-09-29 1989-03-31 Hitachi Ltd Magnetic recording and reproducing device
US5130810A (en) * 1983-11-23 1992-07-14 Macrovision Corporation Method and apparatus for processing a video signal so as to prohibit the making of acceptable videotape recordings

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5130810A (en) * 1983-11-23 1992-07-14 Macrovision Corporation Method and apparatus for processing a video signal so as to prohibit the making of acceptable videotape recordings
JPS6486683A (en) * 1987-09-29 1989-03-31 Hitachi Ltd Magnetic recording and reproducing device

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