CH580893A5 - - Google Patents

Info

Publication number
CH580893A5
CH580893A5 CH962773A CH962773A CH580893A5 CH 580893 A5 CH580893 A5 CH 580893A5 CH 962773 A CH962773 A CH 962773A CH 962773 A CH962773 A CH 962773A CH 580893 A5 CH580893 A5 CH 580893A5
Authority
CH
Switzerland
Application number
CH962773A
Original Assignee
Gretag 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 Gretag Ag filed Critical Gretag Ag
Priority to CH962773A priority Critical patent/CH580893A5/xx
Priority to DE2335513A priority patent/DE2335513C2/de
Priority to ZA00744128A priority patent/ZA744128B/xx
Priority to CA203,634A priority patent/CA1000879A/en
Priority to NO742389A priority patent/NO139907C/no
Priority to NL7408930A priority patent/NL7408930A/xx
Priority to IT51859/74A priority patent/IT1018711B/it
Priority to FR7423005A priority patent/FR2236321B1/fr
Priority to JP49075082A priority patent/JPS5039401A/ja
Priority to GB2936074A priority patent/GB1434706A/en
Priority to SE7408654A priority patent/SE401886B/xx
Priority to US05/688,347 priority patent/US4188506A/en
Publication of CH580893A5 publication Critical patent/CH580893A5/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)
  • Mobile Radio Communication Systems (AREA)
  • Telephonic Communication Services (AREA)
  • Telephone Function (AREA)
  • Transmitters (AREA)
CH962773A 1973-07-02 1973-07-02 CH580893A5 (fr)

Priority Applications (12)

Application Number Priority Date Filing Date Title
CH962773A CH580893A5 (fr) 1973-07-02 1973-07-02
DE2335513A DE2335513C2 (de) 1973-07-02 1973-07-12 Verfahren und Anlage zum verschleierten Übertragen einer gesprochenen Information über einen Telephoniekanal
ZA00744128A ZA744128B (en) 1973-07-02 1974-06-26 Method and installation for masked speech transmission over a telephone channel
CA203,634A CA1000879A (en) 1973-07-02 1974-06-28 Method and installation for masked speech transmission over a telephone channel
NO742389A NO139907C (no) 1973-07-02 1974-07-01 Fremgangsmaate og anlegg til hemmeliggjort overfoering av taleinformasjon paa en telefonkanal
NL7408930A NL7408930A (nl) 1973-07-02 1974-07-02 Werkwijze en inrichting voor het versluierd overdragen van een gesproken informatie over een telefoniekanaal.
IT51859/74A IT1018711B (it) 1973-07-02 1974-07-02 Procedimento ed impianto di trasmis sione mascherata di un informazione parlata su un canale telefonico
FR7423005A FR2236321B1 (fr) 1973-07-02 1974-07-02
JP49075082A JPS5039401A (fr) 1973-07-02 1974-07-02
GB2936074A GB1434706A (en) 1973-07-02 1974-07-02 Mehtod and installation for masked speech transmission over a telephone channel
SE7408654A SE401886B (sv) 1973-07-02 1974-07-10 Sett och anleggning for maskerad overforing av talad information via en telefonkanal
US05/688,347 US4188506A (en) 1973-07-02 1976-05-20 Method and installation for masked speech transmission over a telephone channel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH962773A CH580893A5 (fr) 1973-07-02 1973-07-02

Publications (1)

Publication Number Publication Date
CH580893A5 true CH580893A5 (fr) 1976-10-15

Family

ID=4353965

Family Applications (1)

Application Number Title Priority Date Filing Date
CH962773A CH580893A5 (fr) 1973-07-02 1973-07-02

Country Status (12)

Country Link
US (1) US4188506A (fr)
JP (1) JPS5039401A (fr)
CA (1) CA1000879A (fr)
CH (1) CH580893A5 (fr)
DE (1) DE2335513C2 (fr)
FR (1) FR2236321B1 (fr)
GB (1) GB1434706A (fr)
IT (1) IT1018711B (fr)
NL (1) NL7408930A (fr)
NO (1) NO139907C (fr)
SE (1) SE401886B (fr)
ZA (1) ZA744128B (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4443660A (en) * 1980-02-04 1984-04-17 Rockwell International Corporation System and method for encrypting a voice signal
JPS57113655A (en) * 1980-12-30 1982-07-15 Oikawa Hisao Signal encryption device
DE3120357A1 (de) * 1981-05-22 1982-12-09 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verfahren zur vertauschung von n teilbaendern
US4433211A (en) * 1981-11-04 1984-02-21 Technical Communications Corporation Privacy communication system employing time/frequency transformation
JPS5885844U (ja) * 1981-12-04 1983-06-10 オムロン株式会社 通信回路
FR2520955B1 (fr) * 1982-01-29 1987-11-13 Radiotechnique Systeme electronique de transmission secrete de signaux audio
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
SE431385B (sv) * 1982-06-11 1984-01-30 Ericsson Telefon Ab L M Sett att forvrenga en talsignal, sett att aterstella den forvrengda talsignalen, samt anordning for att forvrenga respektive aterstella talsignalen
FR2606237B1 (fr) * 1986-10-31 1988-12-09 Trt Telecom Radio Electr Dispositif de cryptophonie analogique a permutations dynamiques de bande
US4972474A (en) * 1989-05-01 1990-11-20 Cylink Corporation Integer encryptor
JPH04101527A (ja) * 1990-08-20 1992-04-03 Mitsubishi Electric Corp 秘話通信装置
ES2078178B1 (es) * 1993-12-31 1998-02-01 Alcatel Standard Electrica Dispositivo de cifrado de datos.
DE19757296C2 (de) * 1997-12-22 2002-12-05 Rohde & Schwarz Verfahren zum Bestimmen der Übertragungsfunktion eines Meßgerätes
US6836804B1 (en) * 2000-10-30 2004-12-28 Cisco Technology, Inc. VoIP network
US20020097861A1 (en) * 2001-01-25 2002-07-25 Acoustic Technologies, Inc. Narrow band shadow encoder

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3124748A (en) * 1964-03-10 Secret signalling systems
US1542566A (en) * 1923-06-30 1925-06-16 Western Electric Co Secret signaling
US1819614A (en) * 1929-03-30 1931-08-18 Bell Telephone Labor Inc Wave transmission system
CH218529A (de) * 1941-05-10 1942-12-15 Patelhold Patentverwertung Verfahren und Einrichtung zur Geheimhaltung von Nachrichten.
CH225461A (de) * 1941-12-08 1943-01-31 Patelhold Patentverwertung Verfahren und Einrichtung zur Geheimhaltung von Nachrichten.
CH227464A (de) * 1942-01-29 1943-06-15 Patelhold Patentverwertung Verfahren zur Übermittlung von Nachrichten, die mit Hilfe von Steuersignalen verschleiert werden.
NL63459C (fr) * 1943-04-05
US3201517A (en) * 1944-04-12 1965-08-17 Bell Telephone Labor Inc Privacy communication system
CH246844A (de) * 1945-09-15 1947-01-31 Patelhold Patentverwertung Verfahren und Einrichtung zur Verschleierung von elektrisch übermittelten Sprachnachrichten.
FR977153A (fr) * 1948-10-27 1951-03-28 Radio Electr Soc Fr Système de communication téléphonique à secret
FR1169671A (fr) * 1957-03-08 1959-01-05 Thomson Houston Comp Francaise Perfectionnements aux systèmes de communications téléphoniques
US3255142A (en) * 1958-05-26 1966-06-07 American Cyanamid Co Process for the segmentation of polymer gell
CH361597A (de) * 1958-08-23 1962-04-30 Patelhold Patentverwertung Verfahren zur Verschleierung von Nachrichtensignalen
CH518658A (de) * 1970-07-07 1972-01-31 Patelhold Patentverwaltungs Un Verfahren zur verschlüsselten Nachrichtenübermittlung durch zeitliche Vertauschung von Informationselementen

Also Published As

Publication number Publication date
DE2335513A1 (de) 1975-01-23
US4188506A (en) 1980-02-12
NO742389L (fr) 1975-01-27
CA1000879A (en) 1976-11-30
NL7408930A (nl) 1975-01-06
FR2236321A1 (fr) 1975-01-31
SE7408654L (fr) 1975-01-03
DE2335513C2 (de) 1982-12-02
ZA744128B (en) 1975-07-30
IT1018711B (it) 1977-10-20
JPS5039401A (fr) 1975-04-11
GB1434706A (en) 1976-05-05
FR2236321B1 (fr) 1977-10-07
NO139907C (no) 1979-06-06
SE401886B (sv) 1978-05-29
NO139907B (no) 1979-02-19

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Legal Events

Date Code Title Description
PL Patent ceased