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

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04KSECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00Secret communication
    • H04K1/04Secret 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 (enrdf_load_html_response)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
BE455172A true BE455172A (enrdf_load_html_response)

Family

ID=4521608

Family Applications (1)

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

Country Status (6)

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

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 (enrdf_load_html_response) * 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 (enrdf_load_html_response) * 1973-06-12 1975-02-28 Patelhold Patentverwertung
CH580893A5 (enrdf_load_html_response) * 1973-07-02 1976-10-15 Gretag Ag
US4058677A (en) * 1974-04-26 1977-11-15 Lear Siegler, Inc. Sound scrambling equipment
CH578807A5 (enrdf_load_html_response) * 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
FR902917A (fr) 1945-09-17
US2411206A (en) 1946-11-19
NL63459C (enrdf_load_html_response)
GB582737A (en) 1946-11-26
CH238926A (de) 1945-08-31

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