NO740416L - Procedure and facilities for clarification, transmission, reception and clarification of voice information. - Google Patents

Procedure and facilities for clarification, transmission, reception and clarification of voice information.

Info

Publication number: NO740416L
Authority: NO; Norway
Prior art keywords: clarification; facilities; reception; procedure; transmission
Prior art date: 1973-02-13

Application number

NO740416A

Other languages

Norwegian (no)

Other versions

NO140401B (en

NO140401C (en

Inventor

Eduard Brunner

Pierre Schmid

Walter Stofer

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.)

1973-02-13

Filing date

1974-02-07

Publication date

1974-08-14

1974-02-07 Application filed by Gretag Ag filed Critical Gretag Ag

1974-08-14 Publication of NO740416L publication Critical patent/NO740416L/en

1979-05-14 Publication of NO140401B publication Critical patent/NO140401B/en

1979-08-22 Publication of NO140401C publication Critical patent/NO140401C/en

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)
Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Reduction Or Emphasis Of Bandwidth Of Signals (AREA)

NO740416A 1973-02-13 1974-02-07 METHOD AND FACILITIES FOR EXPLANATION, TRANSMISSION, RECEPTION AND CLEARANCE OF SPEECH INFORMATION NO140401C (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
CH202673A CH574692A5 (en)	1973-02-13	1973-02-13

Publications (3)

Publication Number	Publication Date
NO740416L true NO740416L (en)	1974-08-14
NO140401B NO140401B (en)	1979-05-14
NO140401C NO140401C (en)	1979-08-22

Family

ID=4224178

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NO740416A NO140401C (en)	1973-02-13	1974-02-07	METHOD AND FACILITIES FOR EXPLANATION, TRANSMISSION, RECEPTION AND CLEARANCE OF SPEECH INFORMATION

Country Status (11)

Country	Link
JP (1)	JPS49119502A (en)
CA (1)	CA1003137A (en)
CH (1)	CH574692A5 (en)
DE (1)	DE2318489C3 (en)
FR (1)	FR2217875B1 (en)
GB (1)	GB1465393A (en)
IT (1)	IT1019573B (en)
NL (1)	NL7401441A (en)
NO (1)	NO140401C (en)
SE (1)	SE392556B (en)
ZA (1)	ZA74916B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE2318247C3 (en) *	1973-04-11	1981-03-26	Siemens AG, 1000 Berlin und 8000 München	Device for the disguised transmission of speech signals
JPS5824984B2 (en) *	1976-06-02	1983-05-24	三菱電機株式会社	Confidential device
CN115529214B (en) *	2022-08-19	2025-05-02	北京邮电大学	Design method of synaesthesia integrated signal using scrambled complementary code orthogonal frequency division multiplexing

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US1620656A (en) *	1924-12-01	1927-03-15	Western Electric Co	Carrier-wave signaling system
US3201517A (en) *	1944-04-12	1965-08-17	Bell Telephone Labor Inc	Privacy communication system
FR977153A (en) *	1948-10-27	1951-03-28	Radio Electr Soc Fr	Secret telephone communication system
FR1169671A (en) *	1957-03-08	1959-01-05	Thomson Houston Comp Francaise	Improvements to telephone communications systems
CH361597A (en) *	1958-08-23	1962-04-30	Patelhold Patentverwertung	Method for obfuscating message signals
US3225142A (en) *	1961-12-18	1965-12-21	Bell Telephone Labor Inc	Privacy system
FR95619E (en) *	1966-05-05	1971-03-26	It Telecommunicazioni Siemens	Time-allocated telephone signal transmission system.
CH499932A (en) *	1968-02-12	1970-11-30	Patelhold Patentverwertung	Synchronization method for program-controlled carrier shift keying
CH518658A (en) *	1970-07-07	1972-01-31	Patelhold Patentverwaltungs Un	Process for encrypted message transmission by interchanging information elements over time
FR2129013A5 (en) *	1971-03-11	1972-10-27	Snecma

1973
- 1973-02-13 CH CH202673A patent/CH574692A5/xx not_active IP Right Cessation
- 1973-04-12 DE DE2318489A patent/DE2318489C3/en not_active Expired
1974
- 1974-01-09 SE SE7400265A patent/SE392556B/en unknown
- 1974-02-01 NL NL7401441A patent/NL7401441A/xx not_active Application Discontinuation
- 1974-02-07 NO NO740416A patent/NO140401C/en unknown
- 1974-02-12 FR FR7404708A patent/FR2217875B1/fr not_active Expired
- 1974-02-12 ZA ZA740916A patent/ZA74916B/en unknown
- 1974-02-12 CA CA192,326A patent/CA1003137A/en not_active Expired
- 1974-02-12 GB GB641174A patent/GB1465393A/en not_active Expired
- 1974-02-13 JP JP49017525A patent/JPS49119502A/ja active Pending
- 1974-04-08 IT IT20723/74A patent/IT1019573B/en active

Also Published As

Publication number	Publication date
JPS49119502A (en)	1974-11-15
NL7401441A (en)	1974-08-15
FR2217875A1 (en)	1974-09-06
CA1003137A (en)	1977-01-04
DE2318489B2 (en)	1979-05-03
CH574692A5 (en)	1976-04-15
NO140401B (en)	1979-05-14
DE2318489C3 (en)	1982-12-23
GB1465393A (en)	1977-02-23
FR2217875B1 (en)	1978-05-12
ZA74916B (en)	1974-12-24
DE2318489A1 (en)	1974-08-15
SE392556B (en)	1977-03-28
NO140401C (en)	1979-08-22
IT1019573B (en)	1977-11-30

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