DK61484A - Fremgangsmaade til at forvraenge et talesignal samt indretning til udoevelse af fremgangsmaaden - Google Patents
Fremgangsmaade til at forvraenge et talesignal samt indretning til udoevelse af fremgangsmaaden Download PDFInfo
- Publication number
- DK61484A DK61484A DK61484A DK61484A DK61484A DK 61484 A DK61484 A DK 61484A DK 61484 A DK61484 A DK 61484A DK 61484 A DK61484 A DK 61484A DK 61484 A DK61484 A DK 61484A
- Authority
- DK
- Denmark
- Prior art keywords
- speech signal
- partial
- procedure
- band
- scrambling
- Prior art date
Links
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)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
- Radio Relay Systems (AREA)
- Noise Elimination (AREA)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8203648A SE431385B (sv) | 1982-06-11 | 1982-06-11 | Sett att forvrenga en talsignal, sett att aterstella den forvrengda talsignalen, samt anordning for att forvrenga respektive aterstella talsignalen |
SE8203648 | 1982-06-11 | ||
PCT/SE1983/000230 WO1983004460A1 (en) | 1982-06-11 | 1983-06-06 | Methods and apparatus for distorting and recomposing a speech signal |
SE8300230 | 1983-06-06 |
Publications (4)
Publication Number | Publication Date |
---|---|
DK61484A true DK61484A (da) | 1984-02-10 |
DK61484D0 DK61484D0 (da) | 1984-02-10 |
DK160069B DK160069B (da) | 1991-01-21 |
DK160069C DK160069C (da) | 1991-06-10 |
Family
ID=20347049
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK061484A DK160069C (da) | 1982-06-11 | 1984-02-10 | Fremgangsmaade til at forvraenge et talesignal samt indretning til udoevelse af fremgangsmaaden |
Country Status (9)
Country | Link |
---|---|
US (1) | US4802219A (da) |
CA (1) | CA1210817A (da) |
DK (1) | DK160069C (da) |
ES (1) | ES8501186A1 (da) |
FI (1) | FI75458C (da) |
GB (1) | GB2132056B (da) |
NL (1) | NL191816C (da) |
SE (1) | SE431385B (da) |
WO (1) | WO1983004460A1 (da) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2182229B (en) * | 1985-10-25 | 1989-10-04 | Racal Res Ltd | Speech scramblers |
JPS6424648A (en) * | 1987-07-21 | 1989-01-26 | Fujitsu Ltd | Privacy call equipment |
US5731980A (en) * | 1996-08-23 | 1998-03-24 | Pitney Bowes Inc. | Electronic postage meter system having internal accounting system and removable external accounting system |
JP3762609B2 (ja) * | 2000-03-15 | 2006-04-05 | シャープ株式会社 | 通信装置および周波数スペクトラム反転演算方法およびプログラム記憶媒体 |
US7143028B2 (en) | 2002-07-24 | 2006-11-28 | Applied Minds, Inc. | Method and system for masking speech |
US20040125922A1 (en) * | 2002-09-12 | 2004-07-01 | Specht Jeffrey L. | Communications device with sound masking system |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE569790C (de) * | 1930-03-01 | 1933-02-08 | Siemens Ag | Verfahren zur Geheimhaltung von elektrisch uebermittelten Nachrichten |
DE1273002B (de) * | 1963-09-11 | 1968-07-18 | Siemens Ag | Einrichtung zur verschluesselten UEbertragung von Sprachsignalen durch Vertauschung von Teilbaendern |
US3777064A (en) * | 1972-06-01 | 1973-12-04 | Us Navy | Voice privacy system |
US3886313A (en) * | 1972-09-29 | 1975-05-27 | Datotek | Voice security method and system |
US4068094A (en) * | 1973-02-13 | 1978-01-10 | Gretag Aktiengesellschaft | Method and apparatus for the scrambled transmission of spoken information via a telephony channel |
CH580893A5 (da) * | 1973-07-02 | 1976-10-15 | Gretag Ag | |
US4221931A (en) * | 1977-10-17 | 1980-09-09 | Harris Corporation | Time division multiplied speech scrambler |
US4195202A (en) * | 1978-01-03 | 1980-03-25 | Technical Communications Corporation | Voice privacy system with amplitude masking |
US4278840A (en) * | 1979-03-23 | 1981-07-14 | Datotek, Inc. | Dynamic frequency and time voice encryption system and method |
DE3120357A1 (de) * | 1981-05-22 | 1982-12-09 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Verfahren zur vertauschung von n teilbaendern |
US4434323A (en) * | 1981-06-29 | 1984-02-28 | Motorola, Inc. | Scrambler key code synchronizer |
FR2520955B1 (fr) * | 1982-01-29 | 1987-11-13 | Radiotechnique | Systeme electronique de transmission secrete de signaux audio |
US4551580A (en) * | 1982-11-22 | 1985-11-05 | At&T Bell Laboratories | Time-frequency scrambler |
JPS6128250A (ja) * | 1984-06-29 | 1986-02-07 | Nec Corp | 秘話通信装置 |
-
1982
- 1982-06-11 SE SE8203648A patent/SE431385B/sv not_active IP Right Cessation
-
1983
- 1983-06-06 GB GB08402898A patent/GB2132056B/en not_active Expired
- 1983-06-06 US US06/573,937 patent/US4802219A/en not_active Expired - Lifetime
- 1983-06-06 NL NL8320187A patent/NL191816C/xx not_active IP Right Cessation
- 1983-06-06 WO PCT/SE1983/000230 patent/WO1983004460A1/en active IP Right Grant
- 1983-06-10 CA CA000430169A patent/CA1210817A/en not_active Expired
- 1983-06-10 ES ES523157A patent/ES8501186A1/es not_active Expired
-
1984
- 1984-01-24 FI FI840281A patent/FI75458C/sv not_active IP Right Cessation
- 1984-02-10 DK DK061484A patent/DK160069C/da not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
GB8402898D0 (en) | 1984-03-07 |
ES523157A0 (es) | 1984-11-01 |
SE431385B (sv) | 1984-01-30 |
CA1210817A (en) | 1986-09-02 |
NL191816B (nl) | 1996-04-01 |
DK160069B (da) | 1991-01-21 |
ES8501186A1 (es) | 1984-11-01 |
US4802219A (en) | 1989-01-31 |
FI75458C (sv) | 1988-06-09 |
GB2132056B (en) | 1986-08-28 |
FI840281A0 (fi) | 1984-01-24 |
WO1983004460A1 (en) | 1983-12-22 |
GB2132056A (en) | 1984-06-27 |
DK61484D0 (da) | 1984-02-10 |
NL8320187A (nl) | 1984-04-02 |
DK160069C (da) | 1991-06-10 |
FI840281A (fi) | 1984-01-24 |
NL191816C (nl) | 1996-08-02 |
FI75458B (fi) | 1988-02-29 |
SE8203648L (sv) | 1983-12-12 |
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Legal Events
Date | Code | Title | Description |
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PBP | Patent lapsed |
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