HK1013747A1 - Method and system for audio scrambling and descrambling - Google Patents

Method and system for audio scrambling and descrambling

Info

Publication number
HK1013747A1
HK1013747A1 HK98114981A HK98114981A HK1013747A1 HK 1013747 A1 HK1013747 A1 HK 1013747A1 HK 98114981 A HK98114981 A HK 98114981A HK 98114981 A HK98114981 A HK 98114981A HK 1013747 A1 HK1013747 A1 HK 1013747A1
Authority
HK
Hong Kong
Prior art keywords
signal
carrier
modulators
audio
scrambled
Prior art date
Application number
HK98114981A
Other languages
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
Publication of HK1013747A1 publication Critical patent/HK1013747A1/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)
  • 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)
HK98114981A 1993-10-26 1998-12-23 Method and system for audio scrambling and descrambling HK1013747A1 (en)

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
HK1013747A1 true HK1013747A1 (en) 1999-09-03

Family

ID=22511456

Family Applications (1)

Application Number Title Priority Date Filing Date
HK98114981A HK1013747A1 (en) 1993-10-26 1998-12-23 Method and system for audio scrambling and descrambling

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
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
DK0744105T3 (da) 1999-08-23

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Legal Events

Date Code Title Description
PF Patent in force
PE Patent expired

Effective date: 20141017