ES464227A1 - Method of encoded transmission of data signals - Google Patents

Method of encoded transmission of data signals

Info

Publication number
ES464227A1
ES464227A1 ES464227A ES464227A ES464227A1 ES 464227 A1 ES464227 A1 ES 464227A1 ES 464227 A ES464227 A ES 464227A ES 464227 A ES464227 A ES 464227A ES 464227 A1 ES464227 A1 ES 464227A1
Authority
ES
Spain
Prior art keywords
elements
data signals
time
encoded transmission
permutation
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.)
Expired
Application number
ES464227A
Other languages
Spanish (es)
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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
Priority claimed from DE19762652607 external-priority patent/DE2652607A1/en
Application filed by Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of ES464227A1 publication Critical patent/ES464227A1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

In this method, the speech signal to be encrypted is separated within a time period into n time elements, and into m equally wide frequency bands, forming a matrix of n . m frequency-time elements. For encryption, these elements are permuted before transmission, all (n . m)! possible permutations being allowed. The permutation can be different again for each successive time frame, e.g. controlled by a pseudo-random number generator.
ES464227A 1976-11-19 1977-11-17 Method of encoded transmission of data signals Expired ES464227A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19762652607 DE2652607A1 (en) 1976-11-19 1976-11-19 Analogue information signal encoder - includes array of ring modulators and stores time and frequency multiplexed elements in digital form
DE19772725065 DE2725065A1 (en) 1976-11-19 1977-06-03 METHOD FOR VARIOUS TRANSMISSION OF MESSAGE SIGNALS

Publications (1)

Publication Number Publication Date
ES464227A1 true ES464227A1 (en) 1978-07-01

Family

ID=25771162

Family Applications (1)

Application Number Title Priority Date Filing Date
ES464227A Expired ES464227A1 (en) 1976-11-19 1977-11-17 Method of encoded transmission of data signals

Country Status (8)

Country Link
AT (1) AT373457B (en)
BR (1) BR7707673A (en)
CH (1) CH628760A5 (en)
DE (1) DE2725065A1 (en)
ES (1) ES464227A1 (en)
GB (1) GB1596185A (en)
IL (1) IL53383A (en)
NL (1) NL7712095A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2811635A1 (en) * 1978-03-17 1979-09-20 Tekade Felten & Guilleaume PSEUDO-ACCESSIBLE PRODUCTION OF ORTHOGONAL MATRICES FOR ENCYCLING PURPOSES
US4443660A (en) * 1980-02-04 1984-04-17 Rockwell International Corporation System and method for encrypting a voice signal

Also Published As

Publication number Publication date
DE2725065A1 (en) 1978-12-07
NL7712095A (en) 1978-05-23
IL53383A (en) 1980-01-31
CH628760A5 (en) 1982-03-15
BR7707673A (en) 1978-07-25
AT373457B (en) 1984-01-25
GB1596185A (en) 1981-08-19
ATA784277A (en) 1983-05-15

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