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 talsignalen

Info

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
Application number
SE8203648A
Other languages
English (en)
Swedish (sv)
Other versions
SE8203648L (sv
Inventor
P Tjernlund
Original Assignee
Ericsson Telefon Ab L M
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Priority to SE8203648A priority Critical patent/SE431385B/sv
Priority to NL8320187A priority patent/NL191816C/xx
Priority to PCT/SE1983/000230 priority patent/WO1983004460A1/en
Priority to GB08402898A priority patent/GB2132056B/en
Priority to US06/573,937 priority patent/US4802219A/en
Priority to ES523157A priority patent/ES8501186A1/es
Priority to CA000430169A priority patent/CA1210817A/en
Publication of SE8203648L publication Critical patent/SE8203648L/
Priority to FI840281A priority patent/FI75458C/fi
Publication of SE431385B publication Critical patent/SE431385B/sv
Priority to NO840460A priority patent/NO165320C/no
Priority to DK061484A priority patent/DK160069C/da
Priority to MY463/87A priority patent/MY8700463A/xx

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)
SE8203648A 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 SE431385B (sv)

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
NL8320187A NL191816C (nl) 1982-06-11 1983-06-06 Werkwijze voor het vervormen van een spreeksignaal en inrichting voor het toepassen van deze werkwijze.
PCT/SE1983/000230 WO1983004460A1 (en) 1982-06-11 1983-06-06 Methods and apparatus for distorting and recomposing a speech signal
GB08402898A GB2132056B (en) 1982-06-11 1983-06-06 Methods and apparatus for distorting and recomposing a speech signal
US06/573,937 US4802219A (en) 1982-06-11 1983-06-06 Method and apparatus for distorting 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 (fi) 1982-06-11 1984-01-24 Saett och anordning foer att foervraenga 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 (fi)
CA (1) CA1210817A (fi)
DK (1) DK160069C (fi)
ES (1) ES8501186A1 (fi)
FI (1) FI75458C (fi)
GB (1) GB2132056B (fi)
NL (1) NL191816C (fi)
SE (1) SE431385B (fi)
WO (1) WO1983004460A1 (fi)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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 (fi) * 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

Also Published As

Publication number Publication date
NL8320187A (nl) 1984-04-02
FI75458C (fi) 1988-06-09
FI840281A0 (fi) 1984-01-24
GB2132056A (en) 1984-06-27
ES523157A0 (es) 1984-11-01
GB8402898D0 (en) 1984-03-07
SE8203648L (sv) 1983-12-12
WO1983004460A1 (en) 1983-12-22
DK61484A (da) 1984-02-10
DK160069B (da) 1991-01-21
ES8501186A1 (es) 1984-11-01
NL191816B (nl) 1996-04-01
GB2132056B (en) 1986-08-28
FI840281L (fi) 1984-01-24
CA1210817A (en) 1986-09-02
DK61484D0 (da) 1984-02-10
NL191816C (nl) 1996-08-02
FI75458B (fi) 1988-02-29
US4802219A (en) 1989-01-31
DK160069C (da) 1991-06-10

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