JPS57113655A - Signal encryption device - Google Patents

Signal encryption device

Info

Publication number
JPS57113655A
JPS57113655A JP18623880A JP18623880A JPS57113655A JP S57113655 A JPS57113655 A JP S57113655A JP 18623880 A JP18623880 A JP 18623880A JP 18623880 A JP18623880 A JP 18623880A JP S57113655 A JPS57113655 A JP S57113655A
Authority
JP
Japan
Prior art keywords
signal
delay
given
mainly
filter bank
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
JP18623880A
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 JP18623880A priority Critical patent/JPS57113655A/en
Publication of JPS57113655A publication Critical patent/JPS57113655A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/06—Secret communication by transmitting the information or elements thereof at unnatural speeds or in jumbled order or backwards

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To achieve encryption of signal, by splitting an audio signal into a plurality of frequency bands and giving different delay to each band. CONSTITUTION:An audio signal from a microphone 1 is given to a tapped delay line 4 via a band pass filter 2 and an amplifier 3, and a split signal with different delay amount is prepared from each tap. The assignment of delay amount is determined to each input of each channel filter bank 6 succeeding to the next stage with a labyrinth (replacement) circuit 5 being a key. The output of the channel filter bank 6 is synthesized into one signal at an addition amplifier 7 and given on a signal carrier. To completely lose understanding, the delay time of frequency band occupied with consonants mainly and the delay time of the frequency band occupied mainly with vowels are separated by several hundred msec.
JP18623880A 1980-12-30 1980-12-30 Signal encryption device Pending JPS57113655A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18623880A JPS57113655A (en) 1980-12-30 1980-12-30 Signal encryption device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18623880A JPS57113655A (en) 1980-12-30 1980-12-30 Signal encryption device

Publications (1)

Publication Number Publication Date
JPS57113655A true JPS57113655A (en) 1982-07-15

Family

ID=16184764

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18623880A Pending JPS57113655A (en) 1980-12-30 1980-12-30 Signal encryption device

Country Status (1)

Country Link
JP (1) JPS57113655A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4525844A (en) * 1981-05-22 1985-06-25 Licentia Patent-Verwaltungs-Gmbh Method for interchanging n partial bands
JP2020514819A (en) * 2017-03-15 2020-05-21 ガーディアン・グラス・エルエルシーＧｕａｒｄｉａｎ Ｇｌａｓｓ， Ｌｌｃ Speech privacy system and / or related methods
JP2020515887A (en) * 2017-03-15 2020-05-28 ガーディアン・グラス・エルエルシーＧｕａｒｄｉａｎ Ｇｌａｓｓ， Ｌｌｃ Speech privacy system and/or related methods

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5039401A (en) * 1973-07-02 1975-04-11

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5039401A (en) * 1973-07-02 1975-04-11

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4525844A (en) * 1981-05-22 1985-06-25 Licentia Patent-Verwaltungs-Gmbh Method for interchanging n partial bands
JP2020514819A (en) * 2017-03-15 2020-05-21 ガーディアン・グラス・エルエルシーＧｕａｒｄｉａｎ Ｇｌａｓｓ， Ｌｌｃ Speech privacy system and / or related methods
JP2020515887A (en) * 2017-03-15 2020-05-28 ガーディアン・グラス・エルエルシーＧｕａｒｄｉａｎ Ｇｌａｓｓ， Ｌｌｃ Speech privacy system and/or related methods

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