DK0744105T3 - Fremgangsmåde og apparat til audiomaskering og -afmaskering med lave omkostninger - Google Patents

Fremgangsmåde og apparat til audiomaskering og -afmaskering med lave omkostninger

Info

Publication number
DK0744105T3
DK0744105T3 DK94931915T DK94931915T DK0744105T3 DK 0744105 T3 DK0744105 T3 DK 0744105T3 DK 94931915 T DK94931915 T DK 94931915T DK 94931915 T DK94931915 T DK 94931915T DK 0744105 T3 DK0744105 T3 DK 0744105T3
Authority
DK
Denmark
Prior art keywords
signal
carrier
modulators
masking
scrambled
Prior art date
Application number
DK94931915T
Other languages
Danish (da)
English (en)
Inventor
Ronald Quan
Original Assignee
Macrovision Corp
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 Macrovision Corp filed Critical Macrovision Corp
Application granted granted Critical
Publication of DK0744105T3 publication Critical patent/DK0744105T3/da

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)
  • Amplitude Modulation (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Reverberation, Karaoke And Other Acoustics (AREA)
  • Stereo-Broadcasting Methods (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Transmitters (AREA)
DK94931915T 1993-10-26 1994-10-18 Fremgangsmåde og apparat til audiomaskering og -afmaskering med lave omkostninger DK0744105T3 (da)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US14506693A 1993-10-26 1993-10-26
PCT/US1994/011891 WO1995012922A2 (en) 1993-10-26 1994-10-18 Method and apparatus for low cost audio scrambling and descrambling

Publications (1)

Publication Number Publication Date
DK0744105T3 true DK0744105T3 (da) 1999-08-23

Family

ID=22511456

Family Applications (1)

Application Number Title Priority Date Filing Date
DK94931915T DK0744105T3 (da) 1993-10-26 1994-10-18 Fremgangsmåde og apparat til audiomaskering og -afmaskering med lave omkostninger

Country Status (14)

Country Link
EP (1) EP0744105B1 (de)
JP (1) JP3150700B2 (de)
KR (1) KR100249656B1 (de)
AT (1) ATE175063T1 (de)
AU (1) AU695981B2 (de)
CA (1) CA2181691C (de)
DE (1) DE69415555T2 (de)
DK (1) DK0744105T3 (de)
ES (1) ES2125494T3 (de)
HK (1) HK1013747A1 (de)
MY (1) MY111488A (de)
NZ (1) NZ275269A (de)
TW (1) TW311307B (de)
WO (1) WO1995012922A2 (de)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4636853A (en) * 1983-12-21 1987-01-13 Zenith Electronics Corporation Dynamic audio scrambling system
US5058159A (en) * 1989-06-15 1991-10-15 Macrovision Corporation Method and system for scrambling and descrambling audio information signals
US5159631A (en) * 1990-04-26 1992-10-27 Macrovision Corporation Audio scrambling system using in-band carrier

Also Published As

Publication number Publication date
EP0744105B1 (de) 1998-12-23
DE69415555T2 (de) 1999-05-12
AU8082894A (en) 1995-05-23
WO1995012922A2 (en) 1995-05-11
HK1013747A1 (en) 1999-09-03
JP3150700B2 (ja) 2001-03-26
EP0744105A1 (de) 1996-11-27
DE69415555D1 (de) 1999-02-04
CA2181691C (en) 2000-10-17
JPH10500259A (ja) 1998-01-06
MY111488A (en) 2000-06-30
WO1995012922A3 (en) 1995-07-13
KR100249656B1 (ko) 2000-03-15
ATE175063T1 (de) 1999-01-15
CA2181691A1 (en) 1995-05-11
TW311307B (de) 1997-07-21
ES2125494T3 (es) 1999-03-01
AU695981B2 (en) 1998-08-27
NZ275269A (en) 1998-08-26

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