JPS57113648A - Signal encryption device - Google Patents

Signal encryption device

Info

Publication number
JPS57113648A
JPS57113648A JP55186241A JP18624180A JPS57113648A JP S57113648 A JPS57113648 A JP S57113648A JP 55186241 A JP55186241 A JP 55186241A JP 18624180 A JP18624180 A JP 18624180A JP S57113648 A JPS57113648 A JP S57113648A
Authority
JP
Japan
Prior art keywords
signal
processor
binary code
converter
converted
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
JP55186241A
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 JP55186241A priority Critical patent/JPS57113648A/en
Publication of JPS57113648A publication Critical patent/JPS57113648A/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
    • G11B20/10—Digital recording or reproducing

Landscapes

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

Abstract

PURPOSE:To make encryption of signals with a simple device, by performing convolution operation with a binary code signal. CONSTITUTION:An audio signal from a microphone 1a or input terminal 1b is applied to an AD converter 4 via an amplifier 2, band pass filter 3, and recording/playback selector switch S1 and converted into a digital signal, then led in to a digital signal processor 5. After the processor 5 makes convolution operation to a binary code signal in which the time width is longer than one syllable of a normal conversation word with significance, the output is converted into an analog signal at a DA converter 9 and recorded on a tape recorder 12 via a switch S2. At playback, the signal is given to the processor 5 through a route shown in dotted lines and the original signal can be restored by making the correlation operation through the use of the same binary code signal.
JP55186241A 1980-12-30 1980-12-30 Signal encryption device Pending JPS57113648A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55186241A JPS57113648A (en) 1980-12-30 1980-12-30 Signal encryption device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55186241A JPS57113648A (en) 1980-12-30 1980-12-30 Signal encryption device

Publications (1)

Publication Number Publication Date
JPS57113648A true JPS57113648A (en) 1982-07-15

Family

ID=16184815

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55186241A Pending JPS57113648A (en) 1980-12-30 1980-12-30 Signal encryption device

Country Status (1)

Country Link
JP (1) JPS57113648A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59122254A (en) * 1982-12-28 1984-07-14 Toshiba Corp Protecting method of data
JPH01107057U (en) * 1987-12-31 1989-07-19

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB139556A (en) * 1919-01-21 1920-03-11 Harry Grice Improvements in toy three-wheeled trucks or carriages propelled by the rider

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB139556A (en) * 1919-01-21 1920-03-11 Harry Grice Improvements in toy three-wheeled trucks or carriages propelled by the rider

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59122254A (en) * 1982-12-28 1984-07-14 Toshiba Corp Protecting method of data
JPH0218621B2 (en) * 1982-12-28 1990-04-26 Tokyo Shibaura Electric Co
JPH01107057U (en) * 1987-12-31 1989-07-19

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