NL63459C - - Google Patents

Info

Publication number
NL63459C
NL63459C NL63459DA NL63459C NL 63459 C NL63459 C NL 63459C NL 63459D A NL63459D A NL 63459DA NL 63459 C NL63459 C NL 63459C
Authority
NL
Netherlands
Prior art keywords
band
bands
inverted
speech
give
Prior art date
Application number
Other languages
English (en)
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 NL63459C publication Critical patent/NL63459C/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)
  • Mobile Radio Communication Systems (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
NL63459D 1943-04-05 NL63459C (fr)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
NL63459C true NL63459C (fr)

Family

ID=4521608

Family Applications (1)

Application Number Title Priority Date Filing Date
NL63459D NL63459C (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
FR902917A (fr) 1945-09-17
US2411206A (en) 1946-11-19
GB582737A (en) 1946-11-26
BE455172A (fr)
CH238926A (de) 1945-08-31

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