BE831528A - Dispositif pour la transmission masquee de signaux de conversation - Google Patents
Dispositif pour la transmission masquee de signaux de conversationInfo
- Publication number
- BE831528A BE831528A BE158435A BE158435A BE831528A BE 831528 A BE831528 A BE 831528A BE 158435 A BE158435 A BE 158435A BE 158435 A BE158435 A BE 158435A BE 831528 A BE831528 A BE 831528A
- Authority
- BE
- Belgium
- Prior art keywords
- conversation signals
- masked
- transmission
- masked transmission
- conversation
- Prior art date
Links
- 230000005540 biological transmission Effects 0.000 title 1
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)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Time-Division Multiplex Systems (AREA)
- Television Systems (AREA)
- Transmitters (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19742434877 DE2434877C3 (de) | 1974-07-19 | Einrichtung zur verschleierten übertragung von Sprachsignalen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE831528A true BE831528A (fr) | 1976-01-19 |
Family
ID=5921046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE158435A BE831528A (fr) | 1974-07-19 | 1975-07-18 | Dispositif pour la transmission masquee de signaux de conversation |
Country Status (16)
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2151886A (en) * | 1983-12-21 | 1985-07-24 | British Broadcasting Corp | Conditional-access broadcast transmission |
| CA1226914A (en) * | 1984-01-26 | 1987-09-15 | The University Of British Columbia | Modem for pseudo noise communication on a.c. lines |
| JP2761281B2 (ja) * | 1990-05-17 | 1998-06-04 | 富士通株式会社 | マルチキャリア通信システムの暗号化通信方式 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1278172A (fr) * | 1960-10-28 | 1961-12-08 | Cie Ind Des Telephones | Dispositif électronique de codage pour liaisons radioélectriques ou téléphoniques |
| FR2129013A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1971-03-11 | 1972-10-27 | Snecma | |
| GB1465923A (en) * | 1973-04-03 | 1977-03-02 | Siemens Ag | Camouflaged speech signal transmission systems |
-
1975
- 1975-07-03 CH CH866075A patent/CH596716A5/xx not_active IP Right Cessation
- 1975-07-07 GB GB28486/75A patent/GB1512696A/en not_active Expired
- 1975-07-07 IE IE1506/75A patent/IE41265B1/xx unknown
- 1975-07-08 AT AT526575A patent/AT341003B/de not_active IP Right Cessation
- 1975-07-09 ZA ZA00754406A patent/ZA754406B/xx unknown
- 1975-07-10 AU AU82908/75A patent/AU501260B2/en not_active Expired
- 1975-07-11 IL IL47692A patent/IL47692A/en unknown
- 1975-07-16 FR FR7522195A patent/FR2285029A1/fr active Granted
- 1975-07-17 LU LU73007A patent/LU73007A1/xx unknown
- 1975-07-18 BE BE158435A patent/BE831528A/xx not_active IP Right Cessation
- 1975-07-18 IT IT25534/75A patent/IT1039917B/it active
- 1975-07-18 JP JP50088189A patent/JPS5826706B2/ja not_active Expired
- 1975-07-18 NL NLAANVRAGE7508643,A patent/NL169664C/xx not_active IP Right Cessation
- 1975-07-18 SE SE7508246A patent/SE410259B/xx unknown
- 1975-07-18 DK DK328275A patent/DK140914C/da not_active IP Right Cessation
-
1976
- 1976-04-13 IN IN632/CAL/76A patent/IN147050B/en unknown
Also Published As
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| RE | Patent lapsed |
Owner name: SIEMENS A.G. Effective date: 19840718 |