BE455172A - - Google Patents

Info

Publication number
BE455172A
BE455172A BE455172DA BE455172A BE 455172 A BE455172 A BE 455172A BE 455172D A BE455172D A BE 455172DA BE 455172 A BE455172 A BE 455172A
Authority
BE
Belgium
Application number
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.)
Publication of BE455172A publication Critical patent/BE455172A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/04—Secret communication by frequency scrambling, i.e. by transposing or inverting parts of the frequency band or by inverting the whole band

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Complex Calculations (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Mobile Radio Communication Systems (AREA)
BE455172D 1943-04-05 BE455172A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH582737X 1943-04-05

Publications (1)

Publication Number Publication Date
BE455172A true BE455172A (fr)

Family

ID=4521608

Family Applications (1)

Application Number Title Priority Date Filing Date
BE455172D BE455172A (fr) 1943-04-05

Country Status (6)

Country Link
US (1) US2411206A (fr)
BE (1) BE455172A (fr)
CH (1) CH238926A (fr)
FR (1) FR902917A (fr)
GB (1) GB582737A (fr)
NL (1) NL63459C (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3124748A (en) * 1964-03-10 Secret signalling systems
CH246844A (de) * 1945-09-15 1947-01-31 Patelhold Patentverwertung Verfahren und Einrichtung zur Verschleierung von elektrisch übermittelten Sprachnachrichten.
BE473802A (fr) * 1946-08-20
US2535442A (en) * 1949-07-26 1950-12-26 James L A Mclaughlin Heterodyne eliminator communication system
US2766325A (en) * 1951-09-01 1956-10-09 Itt Narrow band communication system
DE1062750B (de) * 1957-09-27 1959-08-06 Standard Elektrik Lorenz Ag Anordnung zur Umschaltung von Sprachinvertern in Nachrichtenuebertragungsanlagen
DE1181749B (de) * 1960-03-31 1964-11-19 Siemens Ag Verfahren zur Nachrichtenverschluesselung
DE1196713B (de) * 1962-08-30 1965-07-15 Deutsche Bundespost Verfahren zur Sprachverschluesselung
US4068094A (en) * 1973-02-13 1978-01-10 Gretag Aktiengesellschaft Method and apparatus for the scrambled transmission of spoken information via a telephony channel
CH559483A5 (fr) * 1973-06-12 1975-02-28 Patelhold Patentverwertung
CH580893A5 (fr) * 1973-07-02 1976-10-15 Gretag Ag
US4058677A (en) * 1974-04-26 1977-11-15 Lear Siegler, Inc. Sound scrambling equipment
CH578807A5 (fr) * 1974-11-05 1976-08-13 Patelhold Patentverwertung
DE2523828C2 (de) * 1975-05-30 1982-08-12 TE KA DE Felten & Guilleaume Fernmeldeanlagen GmbH, 8500 Nürnberg Verfahren zur Verschleierung von Sprachsignalen mit Hilfe orthogonaler Matrizen
DE2750240C3 (de) * 1977-11-10 1981-03-26 Felten & Guilleaume Fernmeldeanlagen GmbH, 8500 Nürnberg Verfahren zur Verbesserung der Wiedergabequalität von Sprache bei Verschlüsselungsverfahren
US4156107A (en) * 1978-02-03 1979-05-22 Bell Telephone Laboratories, Incorporated Speech signal scrambler
US4443660A (en) * 1980-02-04 1984-04-17 Rockwell International Corporation System and method for encrypting a voice signal
US4591673A (en) * 1982-05-10 1986-05-27 Lee Lin Shan Frequency or time domain speech scrambling technique and system which does not require any frame synchronization
US5949878A (en) * 1996-06-28 1999-09-07 Transcrypt International, Inc. Method and apparatus for providing voice privacy in electronic communication systems

Also Published As

Publication number Publication date
GB582737A (en) 1946-11-26
CH238926A (de) 1945-08-31
NL63459C (fr)
FR902917A (fr) 1945-09-17
US2411206A (en) 1946-11-19

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