JPS57500089A - - Google Patents
Info
- Publication number
- JPS57500089A JPS57500089A JP50053481A JP50053481A JPS57500089A JP S57500089 A JPS57500089 A JP S57500089A JP 50053481 A JP50053481 A JP 50053481A JP 50053481 A JP50053481 A JP 50053481A JP S57500089 A JPS57500089 A JP S57500089A
- Authority
- JP
- Japan
- 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.)
- Pending
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)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH81780A CH649181A5 (de) | 1980-02-01 | 1980-02-01 | Verfahren und schaltungsanordnung zur gesicherten uebertragung von sprachsignalen. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57500089A true JPS57500089A (fr) | 1982-01-14 |
Family
ID=4195882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP50053481A Pending JPS57500089A (fr) | 1980-02-01 | 1981-01-30 |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0044845B1 (fr) |
| JP (1) | JPS57500089A (fr) |
| CH (1) | CH649181A5 (fr) |
| DE (1) | DE3164634D1 (fr) |
| WO (1) | WO1981002234A1 (fr) |
Families Citing this family (5)
| 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 (fr) * | 1987-10-21 | 1989-04-26 | Siemens Aktiengesellschaft Österreich | Dispositif de transmission brouillée de signaux analogiques |
| GB8914880D0 (en) * | 1989-06-29 | 1989-08-23 | Indep Broadcasting Authority | Video scrambling in the frequency domain |
| WO1991013464A1 (fr) * | 1990-02-26 | 1991-09-05 | Cray Research, Inc. | Support intermediaire a capacitance reduite |
Family Cites Families (4)
| 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 |
-
1980
- 1980-02-01 CH CH81780A patent/CH649181A5/de not_active IP Right Cessation
-
1981
- 1981-01-30 JP JP50053481A patent/JPS57500089A/ja active Pending
- 1981-01-30 EP EP19810900305 patent/EP0044845B1/fr not_active Expired
- 1981-01-30 WO PCT/CH1981/000010 patent/WO1981002234A1/fr active IP Right Grant
- 1981-01-30 DE DE8181900305T patent/DE3164634D1/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CH649181A5 (de) | 1985-04-30 |
| WO1981002234A1 (fr) | 1981-08-06 |
| DE3164634D1 (en) | 1984-08-16 |
| EP0044845B1 (fr) | 1984-07-11 |
| EP0044845A1 (fr) | 1982-02-03 |