NL6808682A - - Google Patents
Info
- Publication number
- NL6808682A NL6808682A NL6808682A NL6808682A NL6808682A NL 6808682 A NL6808682 A NL 6808682A NL 6808682 A NL6808682 A NL 6808682A NL 6808682 A NL6808682 A NL 6808682A NL 6808682 A NL6808682 A NL 6808682A
- Authority
- NL
- Netherlands
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)
- Synchronisation In Digital Transmission Systems (AREA)
- Telephonic Communication Services (AREA)
- Telephone Function (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8919/67A SE305470B (xx) | 1967-06-21 | 1967-06-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL6808682A true NL6808682A (xx) | 1968-12-23 |
Family
ID=20275361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL6808682A NL6808682A (xx) | 1967-06-21 | 1968-06-20 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3504286A (xx) |
| DE (1) | DE1762441A1 (xx) |
| GB (1) | GB1227215A (xx) |
| NL (1) | NL6808682A (xx) |
| SE (1) | SE305470B (xx) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH572650A5 (xx) * | 1972-12-21 | 1976-02-13 | Gretag Ag | |
| US4086435A (en) * | 1976-09-17 | 1978-04-25 | Biosystems Research Group Ii | Method of and means for scrambling and descrambling speech at audio frequencies |
| US4126761A (en) * | 1977-02-11 | 1978-11-21 | Daniel Graupe | Method of and means for processing an audio frequency signal to conceal intelligility |
| US4156107A (en) * | 1978-02-03 | 1979-05-22 | Bell Telephone Laboratories, Incorporated | Speech signal scrambler |
| US4367456A (en) * | 1979-03-09 | 1983-01-04 | Northern Telecom Limited | PCM and PAM Conversion circuit including signal level variation on the PCM portion of the circuit |
| JPS59126342A (ja) * | 1983-01-10 | 1984-07-20 | Nec Corp | デジタル音声信号伝送方式 |
| CA1226914A (en) * | 1984-01-26 | 1987-09-15 | The University Of British Columbia | Modem for pseudo noise communication on a.c. lines |
| FR2606237B1 (fr) * | 1986-10-31 | 1988-12-09 | Trt Telecom Radio Electr | Dispositif de cryptophonie analogique a permutations dynamiques de bande |
| US5581614A (en) * | 1991-08-19 | 1996-12-03 | Index Systems, Inc. | Method for encrypting and embedding information in a video program |
Family Cites Families (1)
| 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. |
-
1967
- 1967-06-21 SE SE8919/67A patent/SE305470B/xx unknown
-
1968
- 1968-05-29 US US732994A patent/US3504286A/en not_active Expired - Lifetime
- 1968-06-19 DE DE19681762441 patent/DE1762441A1/de active Pending
- 1968-06-20 NL NL6808682A patent/NL6808682A/xx unknown
- 1968-06-20 GB GB1227215D patent/GB1227215A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| SE305470B (xx) | 1968-10-28 |
| US3504286A (en) | 1970-03-31 |
| GB1227215A (xx) | 1971-04-07 |
| DE1762441A1 (de) | 1970-04-30 |