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AU612961B3 - Discrete cosine transform analog speech scrambling system - Google Patents

Discrete cosine transform analog speech scrambling system

Info

Publication number
AU612961B3
AU612961B3 AU69434/91A AU6943491A AU612961B3 AU 612961 B3 AU612961 B3 AU 612961B3 AU 69434/91 A AU69434/91 A AU 69434/91A AU 6943491 A AU6943491 A AU 6943491A AU 612961 B3 AU612961 B3 AU 612961B3
Authority
AU
Australia
Prior art keywords
discrete cosine
cosine transform
analog speech
scrambling system
speech scrambling
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.)
Ceased
Application number
AU69434/91A
Other versions
AU6943491A (en
Inventor
Edward Pyle Dawson
Bruce Maxwell Goldburg
Subramanian Sridharan
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AU69434/91A priority Critical patent/AU612961B3/en
Application granted granted Critical
Publication of AU612961B3 publication Critical patent/AU612961B3/en
Publication of AU6943491A publication Critical patent/AU6943491A/xx
Anticipated expiration legal-status Critical
Ceased 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)
AU69434/91A 1991-01-17 1991-01-17 Discrete cosine transform analog speech scrambling system Ceased AU612961B3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU69434/91A AU612961B3 (en) 1991-01-17 1991-01-17 Discrete cosine transform analog speech scrambling system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU69434/91A AU612961B3 (en) 1991-01-17 1991-01-17 Discrete cosine transform analog speech scrambling system

Publications (2)

Publication Number Publication Date
AU612961B3 true AU612961B3 (en) 1991-06-11
AU6943491A AU6943491A (en) 1991-07-18

Family

ID=3752989

Family Applications (1)

Application Number Title Priority Date Filing Date
AU69434/91A Ceased AU612961B3 (en) 1991-01-17 1991-01-17 Discrete cosine transform analog speech scrambling system

Country Status (1)

Country Link
AU (1) AU612961B3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993020631A2 (en) * 1992-04-03 1993-10-14 University Of Bristol A frequency domain scrambling system for audio signals

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU1444083A (en) * 1982-05-11 1983-11-17 Tandem Computers Inc. Integrated scrambler - encoder
EP0148015A2 (en) * 1983-12-30 1985-07-10 S. P. Radio A/S A method for cryptographic transmission of speech signals and a communication station for performing the method
EP0172047A1 (en) * 1984-06-19 1986-02-19 Bull S.A. Method and system for enciphering and deciphering data transmitted between a transmitting apparatus and a receiving apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU1444083A (en) * 1982-05-11 1983-11-17 Tandem Computers Inc. Integrated scrambler - encoder
EP0148015A2 (en) * 1983-12-30 1985-07-10 S. P. Radio A/S A method for cryptographic transmission of speech signals and a communication station for performing the method
EP0172047A1 (en) * 1984-06-19 1986-02-19 Bull S.A. Method and system for enciphering and deciphering data transmitted between a transmitting apparatus and a receiving apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993020631A2 (en) * 1992-04-03 1993-10-14 University Of Bristol A frequency domain scrambling system for audio signals
WO1993020631A3 (en) * 1992-04-03 1993-12-23 Univ Bristol A frequency domain scrambling system for audio signals

Also Published As

Publication number Publication date
AU6943491A (en) 1991-07-18

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