SE431385B - Sett att forvrenga en talsignal, sett att aterstella den forvrengda talsignalen, samt anordning for att forvrenga respektive aterstella talsignalen - Google Patents
Sett att forvrenga en talsignal, sett att aterstella den forvrengda talsignalen, samt anordning for att forvrenga respektive aterstella talsignalenInfo
- Publication number
- SE431385B SE431385B SE8203648A SE8203648A SE431385B SE 431385 B SE431385 B SE 431385B SE 8203648 A SE8203648 A SE 8203648A SE 8203648 A SE8203648 A SE 8203648A SE 431385 B SE431385 B SE 431385B
- Authority
- SE
- Sweden
- Prior art keywords
- filters
- signal
- subbands
- subband
- mirror
- 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)
- Noise Elimination (AREA)
- Radio Relay Systems (AREA)
Priority Applications (11)
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 |
US06/573,937 US4802219A (en) | 1982-06-11 | 1983-06-06 | Method and apparatus for distorting a speech signal |
PCT/SE1983/000230 WO1983004460A1 (en) | 1982-06-11 | 1983-06-06 | Methods and apparatus for distorting and recomposing a speech signal |
NL8320187A NL191816C (nl) | 1982-06-11 | 1983-06-06 | Werkwijze voor het vervormen van een spreeksignaal en inrichting voor het toepassen van deze werkwijze. |
GB08402898A GB2132056B (en) | 1982-06-11 | 1983-06-06 | Methods and apparatus for distorting and recomposing a speech signal |
ES523157A ES8501186A1 (es) | 1982-06-11 | 1983-06-10 | Metodo y aparato para distorsionar o recomponer una senal vocal. |
CA000430169A CA1210817A (en) | 1982-06-11 | 1983-06-10 | Method and apparatus for distorting a speech signal |
FI840281A FI75458C (sv) | 1982-06-11 | 1984-01-24 | Sätt och anordning för att förvränga en talsignal. |
NO840460A NO165320C (no) | 1982-06-11 | 1984-02-07 | Fremgangsmaate og anordning for aa forvrenge et talesignal. |
DK061484A DK160069C (da) | 1982-06-11 | 1984-02-10 | Fremgangsmaade til at forvraenge et talesignal samt indretning til udoevelse af fremgangsmaaden |
MY463/87A MY8700463A (en) | 1982-06-11 | 1987-12-30 | Distorting a speeech signal |
Applications Claiming Priority (1)
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 |
Publications (2)
Publication Number | Publication Date |
---|---|
SE8203648L SE8203648L (sv) | 1983-12-12 |
SE431385B true SE431385B (sv) | 1984-01-30 |
Family
ID=20347049
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
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 |
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 WO PCT/SE1983/000230 patent/WO1983004460A1/en active IP Right Grant
- 1983-06-06 NL NL8320187A patent/NL191816C/xx not_active IP Right Cessation
- 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 |
---|---|
GB2132056B (en) | 1986-08-28 |
DK61484D0 (da) | 1984-02-10 |
FI840281A (fi) | 1984-01-24 |
FI75458B (fi) | 1988-02-29 |
WO1983004460A1 (en) | 1983-12-22 |
GB2132056A (en) | 1984-06-27 |
DK61484A (da) | 1984-02-10 |
DK160069C (da) | 1991-06-10 |
US4802219A (en) | 1989-01-31 |
ES523157A0 (es) | 1984-11-01 |
NL191816B (nl) | 1996-04-01 |
FI75458C (sv) | 1988-06-09 |
NL8320187A (nl) | 1984-04-02 |
DK160069B (da) | 1991-01-21 |
ES8501186A1 (es) | 1984-11-01 |
SE8203648L (sv) | 1983-12-12 |
CA1210817A (en) | 1986-09-02 |
FI840281A0 (fi) | 1984-01-24 |
GB8402898D0 (en) | 1984-03-07 |
NL191816C (nl) | 1996-08-02 |
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