DK155076A - PROCEDURE FOR COVERING SPEECH SIGNALS BY ORTHOGONAL MATRIX - Google Patents

PROCEDURE FOR COVERING SPEECH SIGNALS BY ORTHOGONAL MATRIX

Info

Publication number
DK155076A
DK155076A DK155076A DK155076A DK155076A DK 155076 A DK155076 A DK 155076A DK 155076 A DK155076 A DK 155076A DK 155076 A DK155076 A DK 155076A DK 155076 A DK155076 A DK 155076A
Authority
DK
Denmark
Prior art keywords
procedure
speech signals
orthogonal matrix
covering
covering speech
Prior art date
Application number
DK155076A
Other languages
Danish (da)
Other versions
DK139408C (en
DK139408B (en
Inventor
J Robra
P Rohm
G Kaminski
H Gruhl
Original Assignee
Tekade Felten & Guilleaume
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 Tekade Felten & Guilleaume filed Critical Tekade Felten & Guilleaume
Publication of DK155076A publication Critical patent/DK155076A/en
Publication of DK139408B publication Critical patent/DK139408B/en
Application granted granted Critical
Publication of DK139408C publication Critical patent/DK139408C/en

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)
  • Facsimile Transmission Control (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
DK155076A 1975-05-30 1976-03-31 PROCEDURE FOR DISTRIBUTING SPEECH SIGNALS BY ORTHOGONAL MATRIX DK139408C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2523828A DE2523828C2 (en) 1975-05-30 1975-05-30 Method for obfuscating speech signals with the aid of orthogonal matrices

Publications (3)

Publication Number Publication Date
DK155076A true DK155076A (en) 1976-12-01
DK139408B DK139408B (en) 1979-02-12
DK139408C DK139408C (en) 1979-07-30

Family

ID=5947713

Family Applications (1)

Application Number Title Priority Date Filing Date
DK155076A DK139408C (en) 1975-05-30 1976-03-31 PROCEDURE FOR DISTRIBUTING SPEECH SIGNALS BY ORTHOGONAL MATRIX

Country Status (11)

Country Link
AT (1) AT351603B (en)
AU (1) AU501272B2 (en)
BE (1) BE842316A (en)
CH (1) CH613575A5 (en)
DE (1) DE2523828C2 (en)
DK (1) DK139408C (en)
FR (1) FR2312895A1 (en)
GB (1) GB1522062A (en)
NL (1) NL171003C (en)
SE (1) SE409798B (en)
ZA (1) ZA763090B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2811635A1 (en) * 1978-03-17 1979-09-20 Tekade Felten & Guilleaume PSEUDO-ACCESSIBLE PRODUCTION OF ORTHOGONAL MATRICES FOR ENCYCLING PURPOSES
CH649181A5 (en) * 1980-02-01 1985-04-30 Schweiz Eidgenossenschaft METHOD AND CIRCUIT FOR SECURED transmitting voice signals.
JP3724676B2 (en) * 1997-03-10 2005-12-07 ソニー株式会社 COMMUNICATION METHOD, TRANSMISSION DEVICE, AND RECEPTION DEVICE
JPH1168696A (en) * 1997-08-19 1999-03-09 Sony Corp Communication method, transmission equipment, reception equipment and cellular radio communication system
CN110489989A (en) * 2019-08-27 2019-11-22 深圳市道通智能航空技术有限公司 Data encrypting/de-encrypling method, its encryption/deciphering chip and its unmanned plane

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH232786A (en) * 1939-07-14 1944-06-15 Patelhold Patentverwertung Device for secret messaging.
CH237094A (en) * 1939-07-26 1945-03-31 Patelhold Patentverwertung Method and device for the transmission of messages to be kept secret.
NL63459C (en) * 1943-04-05
CH246844A (en) * 1945-09-15 1947-01-31 Patelhold Patentverwertung Method and device for obfuscating electrically transmitted voice messages.
FR1582036A (en) * 1968-03-15 1969-09-26

Also Published As

Publication number Publication date
DE2523828B1 (en) 1976-11-25
FR2312895B1 (en) 1982-06-11
SE7605731L (en) 1976-12-01
ZA763090B (en) 1978-01-25
NL171003C (en) 1983-01-17
AT351603B (en) 1979-08-10
ATA391676A (en) 1979-01-15
AU1437276A (en) 1977-12-01
NL7602959A (en) 1976-12-02
NL171003B (en) 1982-08-16
DK139408C (en) 1979-07-30
CH613575A5 (en) 1979-09-28
GB1522062A (en) 1978-08-23
FR2312895A1 (en) 1976-12-24
DK139408B (en) 1979-02-12
DE2523828C2 (en) 1982-08-12
BE842316A (en) 1976-09-16
AU501272B2 (en) 1979-06-14
SE409798B (en) 1979-09-03

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Legal Events

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