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JPS57113651A - Signal encryption device - Google Patents

Signal encryption device

Info

Publication number
JPS57113651A
JPS57113651A JP18623980A JP18623980A JPS57113651A JP S57113651 A JPS57113651 A JP S57113651A JP 18623980 A JP18623980 A JP 18623980A JP 18623980 A JP18623980 A JP 18623980A JP S57113651 A JPS57113651 A JP S57113651A
Authority
JP
Japan
Prior art keywords
signal
signals
restored
sum
noise
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
JP18623980A
Other languages
Japanese (ja)
Inventor
Kazushige Matsuyama
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP18623980A priority Critical patent/JPS57113651A/en
Publication of JPS57113651A publication Critical patent/JPS57113651A/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
    • G11B20/24—Signal processing not specific to the method of recording or reproducing; Circuits therefor for reducing noise

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To achieve encryption, by forming signals of sum and difference of signals and noise, and recording the sum and difference signals with a suitable level and polarity. CONSTITUTION:Taking S as a signal and N as a noise, for example, N+S and N-S are assigned to R and L channels. To restore this, R+L=2N (unnecessary) and R-L=2S (desired output) are operated. Thus, in reproducing the recorded tape with a monaural device, R+L=2N is outputted and the objective signal can not be restored. Further, the objective signal can be restored with an exclusive stereo system only, by giving a suitable amount of delay to either of each channel signal.
JP18623980A 1980-12-30 1980-12-30 Signal encryption device Pending JPS57113651A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18623980A JPS57113651A (en) 1980-12-30 1980-12-30 Signal encryption device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18623980A JPS57113651A (en) 1980-12-30 1980-12-30 Signal encryption device

Publications (1)

Publication Number Publication Date
JPS57113651A true JPS57113651A (en) 1982-07-15

Family

ID=16184781

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18623980A Pending JPS57113651A (en) 1980-12-30 1980-12-30 Signal encryption device

Country Status (1)

Country Link
JP (1) JPS57113651A (en)

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