FR1284800A - Dispositif de transmission codée de signaux téléphoniques - Google Patents

Dispositif de transmission codée de signaux téléphoniques

Info

Publication number
FR1284800A
FR1284800A FR69041357A FR69041357A FR1284800A FR 1284800 A FR1284800 A FR 1284800A FR 69041357 A FR69041357 A FR 69041357A FR 69041357 A FR69041357 A FR 69041357A FR 1284800 A FR1284800 A FR 1284800A
Authority
FR
France
Prior art keywords
voltages
phase
transmitted
constant
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
FR69041357A
Other languages
English (en)
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 FR1284800A publication Critical patent/FR1284800A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/006—Secret communication by varying or inverting the phase, at periodic or random intervals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Telephonic Communication Services (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
FR69041357A 1960-04-28 1961-03-15 Dispositif de transmission codée de signaux téléphoniques Expired FR1284800A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH481960A CH379579A (de) 1960-04-28 1960-04-28 Einrichtung zur verschleierten Übertragung von Sprechsignalen

Publications (1)

Publication Number Publication Date
FR1284800A true FR1284800A (fr) 1962-02-16

Family

ID=4283079

Family Applications (1)

Application Number Title Priority Date Filing Date
FR69041357A Expired FR1284800A (fr) 1960-04-28 1961-03-15 Dispositif de transmission codée de signaux téléphoniques

Country Status (4)

Country Link
CH (1) CH379579A (fr)
DE (1) DE1114548B (fr)
FR (1) FR1284800A (fr)
GB (1) GB929251A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3746799A (en) * 1971-09-27 1973-07-17 Us Navy Method and apparatus for encoding and decoding analog signals
CN108234062A (zh) * 2017-12-19 2018-06-29 中国电子科技集团公司第三十研究所 一种基于空口信号特征复杂化的安全传输方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH311424A (de) * 1950-04-22 1955-11-30 Gretener Edgar Ing Dr Verfahren zur Geheimhaltung von Sprache in Nachrichtenübermittlungskanälen.
GB780866A (en) * 1954-11-18 1957-08-07 Marconi Wireless Telegraph Co Improvements in or relating to secret telephone systems

Also Published As

Publication number Publication date
DE1114548B (de) 1961-10-05
GB929251A (en) 1963-06-19
CH379579A (de) 1964-07-15

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