GB1522062A - Encoding and decoding speech signals - Google Patents

Encoding and decoding speech signals

Info

Publication number
GB1522062A
GB1522062A GB18567/76A GB1856776A GB1522062A GB 1522062 A GB1522062 A GB 1522062A GB 18567/76 A GB18567/76 A GB 18567/76A GB 1856776 A GB1856776 A GB 1856776A GB 1522062 A GB1522062 A GB 1522062A
Authority
GB
United Kingdom
Prior art keywords
speech signals
carried out
encoding
transformed
encrypted
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB18567/76A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tekade Felten and Guilleaume Fernmeldeanlagen GmbH
Original Assignee
Tekade Felten and Guilleaume Fernmeldeanlagen GmbH
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 and Guilleaume Fernmeldeanlagen GmbH filed Critical Tekade Felten and Guilleaume Fernmeldeanlagen GmbH
Publication of GB1522062A publication Critical patent/GB1522062A/en
Expired legal-status Critical Current

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)

Abstract

In the method for encrypting analog speech signals with the aid of orthogonal matrices, the encrypted signals can be transmitted via a channel with restricted bandwidth. The encryption is carried out in a digital intermediate stage (ZV, S1, ZW1, ZW2, S2, M, ROM, A) in which digitised samples of the signal (E) to be encrypted are transformed using an orthogonal matrix. A specific re-arrangement of the order of the transformed samples and their subsequent transmission to the receiver as a continuous signal are carried out simultaneously. The matrix transformation and the aforementioned re-arrangement together represent an encryption method which is immune to synchronisation errors between samplings at the transmitting and receiving ends. <IMAGE>
GB18567/76A 1975-05-30 1976-05-06 Encoding and decoding speech signals Expired GB1522062A (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 (1)

Publication Number Publication Date
GB1522062A true GB1522062A (en) 1978-08-23

Family

ID=5947713

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18567/76A Expired GB1522062A (en) 1975-05-30 1976-05-06 Encoding and decoding speech signals

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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0898400A2 (en) * 1997-08-19 1999-02-24 Sony Corporation Communication method, transmission and reception apparatuses, and cellular radio communication system

Families Citing this family (4)

* 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
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0898400A2 (en) * 1997-08-19 1999-02-24 Sony Corporation Communication method, transmission and reception apparatuses, and cellular radio communication system

Also Published As

Publication number Publication date
DK155076A (en) 1976-12-01
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
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

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee