JPS5729100A - Method of modifying voice signal divided into signal segments for encoding transmission and device for executing same method - Google Patents

Method of modifying voice signal divided into signal segments for encoding transmission and device for executing same method

Info

Publication number
JPS5729100A
JPS5729100A JP9460181A JP9460181A JPS5729100A JP S5729100 A JPS5729100 A JP S5729100A JP 9460181 A JP9460181 A JP 9460181A JP 9460181 A JP9460181 A JP 9460181A JP S5729100 A JPS5729100 A JP S5729100A
Authority
JP
Japan
Prior art keywords
signal
segments
ciphered
encoding transmission
voice signal
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
JP9460181A
Other languages
Japanese (ja)
Inventor
Kafurishiyu Menjia
Ueebaa Richiyaado
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.)
CRYPTO AG
Original Assignee
CRYPTO AG
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 CRYPTO AG filed Critical CRYPTO AG
Publication of JPS5729100A publication Critical patent/JPS5729100A/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)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Communication Control (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

1. Method for modifying speech signals divided into segments for ciphered transmission, wherein the individual signal segments (T) are compressed in time by reading them into storages and out of them with different rates, characterized in that the time intervals (Tu ) obtained by said compression are used of the repeated transmission of the edge portions of each signal segment, such that the original signal is continued at the intersection of each segment of the ciphered signals and characterized in that the ciphered signal is combined with a weighting function within the intervals (Tu ) obtained by said compression, such that in said intervals a desired switching function is generated.
JP9460181A 1980-06-20 1981-06-20 Method of modifying voice signal divided into signal segments for encoding transmission and device for executing same method Pending JPS5729100A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH476380 1980-06-20

Publications (1)

Publication Number Publication Date
JPS5729100A true JPS5729100A (en) 1982-02-16

Family

ID=4282095

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9460181A Pending JPS5729100A (en) 1980-06-20 1981-06-20 Method of modifying voice signal divided into signal segments for encoding transmission and device for executing same method

Country Status (10)

Country Link
EP (1) EP0042587B1 (en)
JP (1) JPS5729100A (en)
AR (1) AR228273A1 (en)
AT (1) ATE7993T1 (en)
BR (1) BR8103891A (en)
DE (1) DE3164136D1 (en)
DK (1) DK271481A (en)
ES (1) ES8303853A1 (en)
FI (1) FI811862A7 (en)
NO (1) NO812082L (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0314853U (en) * 1989-06-28 1991-02-14

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59111441A (en) * 1982-12-17 1984-06-27 Sony Corp Privacy telephone system of sound signal
JPS59127442A (en) * 1983-01-11 1984-07-23 Sony Corp Scrambling system for voice signal
FR2541060B1 (en) * 1983-02-16 1989-02-03 Electroniques Et Const METHOD OF INTERFERING INFORMATION TO BE TRANSMITTED FROM A TRANSMITTING STATION TO A RECEIVING STATION
EP0219559B1 (en) * 1985-10-17 1990-09-05 ANT Nachrichtentechnik GmbH Mobile radio system for the transmission of digital as well as analogous signals
FR2625391A1 (en) * 1987-12-23 1989-06-30 Radiotechnique Ind & Comm METHOD AND SYSTEM FOR INTERFERING / UNLOCKING SOUND

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1407196A (en) * 1971-11-16 1975-09-24 British Broadcasting Corp Apparatus for changing signal pitch
US3819852A (en) * 1972-08-29 1974-06-25 P Wolf Method of reducing the interference signals during the transmission of af signals in time-compressed form
DE2834280A1 (en) * 1978-08-04 1980-02-21 Siemens Ag Scrambled speech transmission system - divides signals into time elements which are rearranged and read out at higher speed and gaps filled with additional signals

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0314853U (en) * 1989-06-28 1991-02-14

Also Published As

Publication number Publication date
ES503158A0 (en) 1983-02-01
FI811862L (en) 1981-12-21
ATE7993T1 (en) 1984-06-15
FI811862A7 (en) 1981-12-21
BR8103891A (en) 1982-03-09
DK271481A (en) 1981-12-21
NO812082L (en) 1981-12-21
EP0042587A1 (en) 1981-12-30
ES8303853A1 (en) 1983-02-01
EP0042587B1 (en) 1984-06-13
AR228273A1 (en) 1983-02-15
DE3164136D1 (en) 1984-07-19

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