DE3164634D1 - Process and device for protecting the transmission of vocal signals - Google Patents

Process and device for protecting the transmission of vocal signals

Info

Publication number
DE3164634D1
DE3164634D1 DE8181900305T DE3164634T DE3164634D1 DE 3164634 D1 DE3164634 D1 DE 3164634D1 DE 8181900305 T DE8181900305 T DE 8181900305T DE 3164634 T DE3164634 T DE 3164634T DE 3164634 D1 DE3164634 D1 DE 3164634D1
Authority
DE
Germany
Prior art keywords
protecting
transmission
vocal signals
vocal
signals
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
DE8181900305T
Other languages
English (en)
Inventor
Peter Meier
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.)
Patelhold Patenverwertungs and Elektro-Holding AG
Original Assignee
Patelhold Patenverwertungs and Elektro-Holding 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 Patelhold Patenverwertungs and Elektro-Holding AG filed Critical Patelhold Patenverwertungs and Elektro-Holding AG
Application granted granted Critical
Publication of DE3164634D1 publication Critical patent/DE3164634D1/de
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)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
DE8181900305T 1980-02-01 1981-01-30 Process and device for protecting the transmission of vocal signals Expired DE3164634D1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH81780A CH649181A5 (de) 1980-02-01 1980-02-01 Verfahren und schaltungsanordnung zur gesicherten uebertragung von sprachsignalen.
PCT/CH1981/000010 WO1981002234A1 (fr) 1980-02-01 1981-01-30 Procede et dispositif pour la transmission protegee de signaux vocaux

Publications (1)

Publication Number Publication Date
DE3164634D1 true DE3164634D1 (en) 1984-08-16

Family

ID=4195882

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8181900305T Expired DE3164634D1 (en) 1980-02-01 1981-01-30 Process and device for protecting the transmission of vocal signals

Country Status (5)

Country Link
EP (1) EP0044845B1 (de)
JP (1) JPS57500089A (de)
CH (1) CH649181A5 (de)
DE (1) DE3164634D1 (de)
WO (1) WO1981002234A1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4393276A (en) * 1981-03-19 1983-07-12 Bell Telephone Laboratories, Incorporated Fourier masking analog signal secure communication system
DE3506912A1 (de) * 1985-02-27 1986-08-28 Telefunken Fernseh Und Rundfunk Gmbh, 3000 Hannover Verfahren zur uebertragung eines audiosignals
EP0313029A1 (de) * 1987-10-21 1989-04-26 Siemens Aktiengesellschaft Österreich Vorrichtung zur verschleierten Übertragung analoger Signale
GB8914880D0 (en) * 1989-06-29 1989-08-23 Indep Broadcasting Authority Video scrambling in the frequency domain
WO1991013464A1 (en) * 1990-02-26 1991-09-05 Cray Research, Inc. Reduced capacitance chip carrier

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3944745A (en) * 1945-05-10 1976-03-16 Bell Telephone Laboratories, Incorporated Secret signaling system with means for preventing key disclosure
US4179586A (en) * 1972-08-02 1979-12-18 The United States Of America As Represented By The Secretary Of The Army System of encoded speech transmission and reception
US4064363A (en) * 1974-07-25 1977-12-20 Northrop Corporation Vocoder systems providing wave form analysis and synthesis using fourier transform representative signals
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

Also Published As

Publication number Publication date
WO1981002234A1 (fr) 1981-08-06
JPS57500089A (de) 1982-01-14
EP0044845B1 (de) 1984-07-11
CH649181A5 (de) 1985-04-30
EP0044845A1 (de) 1982-02-03

Similar Documents

Publication Publication Date Title
GB2042739B (en) Method and apparatus for determining the attenuation and/or group delay of a signal path
JPS5729575A (en) Gas-free ion-plating process and device
JPS56150681A (en) Degassing device of pipeline
JPS57110897A (en) Device and method of protecting inner part of pipeline
DE3162253D1 (en) Process and device for the synchronization of digital signals
JPS57135376A (en) Interference signal damping apparatus and method
DE3264232D1 (en) Method and device for the transmission of numerical data
DE3464426D1 (en) Apparatus for distinguishing between speech and certain other signals
IL61137A0 (en) Apparatus for the detection of voice signals
JPS5794342A (en) Reaction method and its device
JPS57122586A (en) Method and device for transmitting signal
DE3163282D1 (en) Process and device for the synthesis of diamonds
JPS5796278A (en) Disturbing signal cancelling method and apparatus
GB2036985B (en) Method and apparatus for determining the transmission properties of a signal path
DE3167624D1 (en) Method and device for the manufacture of annular sausages
JPS56169631A (en) Manufacture of halogenated hydrocarbon
PT73334A (en) Device for engaging and disengaging cable
DE3164634D1 (en) Process and device for protecting the transmission of vocal signals
GB2103446B (en) Apparatus for the line-guided transmission of signals
GB2068984B (en) Fibre and method of making the fibre
JPS5797283A (en) Signal transmitting method and device used therefor
DE3161644D1 (en) Process for the connection of cables
DE3266659D1 (en) Signal propagating device
JPS5747250A (en) Alarm device for approach of train
JPS5654598A (en) Method and device for optical transmission of analog signal

Legal Events

Date Code Title Description
8339 Ceased/non-payment of the annual fee