CH379579A - Device for the disguised transmission of speech signals - Google Patents
Device for the disguised transmission of speech signalsInfo
- Publication number
- CH379579A CH379579A CH481960A CH481960A CH379579A CH 379579 A CH379579 A CH 379579A CH 481960 A CH481960 A CH 481960A CH 481960 A CH481960 A CH 481960A CH 379579 A CH379579 A CH 379579A
- Authority
- CH
- Switzerland
- Prior art keywords
- disguised
- transmission
- speech signals
- speech
- signals
- Prior art date
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)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
- Telephonic Communication Services (AREA)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH481960A CH379579A (en) | 1960-04-28 | 1960-04-28 | Device for the disguised transmission of speech signals |
DE1960P0024996 DE1114548B (en) | 1960-04-28 | 1960-05-13 | Device for the disguised transmission of speech signals |
FR69041357A FR1284800A (en) | 1960-04-28 | 1961-03-15 | Coded transmission device for telephone signals |
GB1507761A GB929251A (en) | 1960-04-28 | 1961-04-26 | Arrangement for the secret transmission of intelligence |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH481960A CH379579A (en) | 1960-04-28 | 1960-04-28 | Device for the disguised transmission of speech signals |
Publications (1)
Publication Number | Publication Date |
---|---|
CH379579A true CH379579A (en) | 1964-07-15 |
Family
ID=4283079
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH481960A CH379579A (en) | 1960-04-28 | 1960-04-28 | Device for the disguised transmission of speech signals |
Country Status (4)
Country | Link |
---|---|
CH (1) | CH379579A (en) |
DE (1) | DE1114548B (en) |
FR (1) | FR1284800A (en) |
GB (1) | GB929251A (en) |
Families Citing this family (2)
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 (en) * | 2017-12-19 | 2018-06-29 | 中国电子科技集团公司第三十研究所 | A kind of safe transmission method based on signal characteristic complication of eating dishes without rice or wine |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH311424A (en) * | 1950-04-22 | 1955-11-30 | Gretener Edgar Ing Dr | Method for the secrecy of speech in communication channels. |
GB780866A (en) * | 1954-11-18 | 1957-08-07 | Marconi Wireless Telegraph Co | Improvements in or relating to secret telephone systems |
-
1960
- 1960-04-28 CH CH481960A patent/CH379579A/en unknown
- 1960-05-13 DE DE1960P0024996 patent/DE1114548B/en active Pending
-
1961
- 1961-03-15 FR FR69041357A patent/FR1284800A/en not_active Expired
- 1961-04-26 GB GB1507761A patent/GB929251A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR1284800A (en) | 1962-02-16 |
DE1114548B (en) | 1961-10-05 |
GB929251A (en) | 1963-06-19 |
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