CA939843A - Voice privacy device - Google Patents

Voice privacy device

Info

Publication number
CA939843A
CA939843A CA119,594A CA119594A CA939843A CA 939843 A CA939843 A CA 939843A CA 119594 A CA119594 A CA 119594A CA 939843 A CA939843 A CA 939843A
Authority
CA
Canada
Prior art keywords
privacy device
voice privacy
voice
privacy
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
CA119,594A
Other versions
CA119594S (en
Inventor
Charles K. Miller
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.)
Technical Communications Corp
Original Assignee
Technical Communications Corp
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 Technical Communications Corp filed Critical Technical Communications Corp
Application granted granted Critical
Publication of CA939843A publication Critical patent/CA939843A/en
Expired legal-status Critical Current

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
CA119,594A 1970-07-30 1971-07-30 Voice privacy device Expired CA939843A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US5965970A 1970-07-30 1970-07-30

Publications (1)

Publication Number Publication Date
CA939843A true CA939843A (en) 1974-01-08

Family

ID=22024396

Family Applications (1)

Application Number Title Priority Date Filing Date
CA119,594A Expired CA939843A (en) 1970-07-30 1971-07-30 Voice privacy device

Country Status (6)

Country Link
US (1) US3723878A (en)
AU (1) AU3179171A (en)
CA (1) CA939843A (en)
DE (1) DE2138228A1 (en)
FR (1) FR2103804A5 (en)
IL (1) IL37241A0 (en)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2231737C1 (en) * 1972-06-29 1990-05-23 Krupp Atlas Electronik Gmbh
US4013837A (en) * 1972-09-29 1977-03-22 Datotek, Inc. Voice security method and system
US3893031A (en) * 1972-11-08 1975-07-01 Boeing Co Synchronization system for voice privacy unit
US3909534A (en) * 1973-09-07 1975-09-30 Boeing Co Voice privacy unit for intercommunication systems
US4091423A (en) * 1975-03-17 1978-05-23 Datotek, Inc. Synchronous digital data scrambling system
US4169212A (en) * 1975-04-14 1979-09-25 Datotek, Inc. Multi-mode digital enciphering system
US4099027A (en) * 1976-01-02 1978-07-04 General Electric Company Speech scrambler
US4159399A (en) * 1976-09-29 1979-06-26 Tokyo Shibaura Electric Co., Ltd. Security communication system using polarity inversion
US4160875A (en) * 1977-05-12 1979-07-10 Kahn Leonard R Security system
US4188580A (en) * 1977-10-20 1980-02-12 Telesync Corporation Secure communication system
US4195202A (en) * 1978-01-03 1980-03-25 Technical Communications Corporation Voice privacy system with amplitude masking
JPS54129901A (en) * 1978-03-31 1979-10-08 Toshiba Corp Secret communication system
DE2854832C2 (en) * 1978-12-19 1980-11-20 Siemens Ag, 1000 Berlin Und 8000 Muenchen Receiving circuit in an interference-suppressing message transmission system with narrow-band conventional message modulation and additional pseudo-random phase-shift modulation
US4278840A (en) * 1979-03-23 1981-07-14 Datotek, Inc. Dynamic frequency and time voice encryption system and method
US4268720A (en) * 1979-05-25 1981-05-19 Gte Laboratories Incorporated Scrambler speech transmission and synchronization system
NZ199275A (en) * 1980-12-16 1984-11-09 Minnesota Mining Mfg Australia Verification of recorded messages
US4401854A (en) * 1981-08-03 1983-08-30 Bell Telephone Laboratories, Incorporated Simultaneous transmission of an analog message signal and a digital data signal
US4433211A (en) * 1981-11-04 1984-02-21 Technical Communications Corporation Privacy communication system employing time/frequency transformation
US4573205A (en) * 1983-08-22 1986-02-25 At&T Bell Laboratories Technique for secure communications on FM radio channels
EP0138485B1 (en) * 1983-09-29 1990-04-04 Nippon Telegraph And Telephone Corporation Radio reception system for a phase modulation signal
DE3482363D1 (en) * 1983-09-30 1990-06-28 Nippon Telegraph & Telephone RADIO TRANSMITTER SYSTEM FOR A PHASE-MODULATED SIGNAL.
US4638357A (en) * 1984-01-20 1987-01-20 Home Box Office, Inc. Audio scrambler
CA1252560A (en) * 1984-01-27 1989-04-11 Frank T. Meriwether Method and system for scrambling information signals
KR100716441B1 (en) * 1999-03-03 2007-05-10 소니 가부시끼 가이샤 Recording apparatus, recording method, reproducing apparatus, and reproducing method
US7069590B1 (en) * 2000-02-17 2006-06-27 Microsoft Corporation System and method for protecting data streams in hardware components
US8792640B2 (en) * 2008-01-29 2014-07-29 Sony Corporation Systems and methods for securing a digital communications link
JP5194110B2 (en) * 2008-04-11 2013-05-08 パナソニック株式会社 Transmitter and receiver

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2479338A (en) * 1945-01-13 1949-08-16 Leonide E Gabrilovitch Inverter and distorter for secret communications
US2905747A (en) * 1953-09-22 1959-09-22 Rca Corp Secrecy systems
US3180927A (en) * 1961-09-07 1965-04-27 Itt Cryptosecure transmission system
US3341659A (en) * 1964-01-24 1967-09-12 Burroughs Corp Controlled bandwidth coded voice communication system
US3610828A (en) * 1967-05-23 1971-10-05 Technical Communications Privacy communication system

Also Published As

Publication number Publication date
US3723878A (en) 1973-03-27
AU3179171A (en) 1973-02-01
DE2138228A1 (en) 1972-03-16
IL37241A0 (en) 1971-11-29
FR2103804A5 (en) 1972-04-14

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