NO160956C - Synkron undertrykkelse-scrambling av televisjonssignaler for abonnent-tv samt fremgangsmaate ved synkron undertrykkelses-scramblerabonnent-tv-system. - Google Patents

Synkron undertrykkelse-scrambling av televisjonssignaler for abonnent-tv samt fremgangsmaate ved synkron undertrykkelses-scramblerabonnent-tv-system.

Info

Publication number
NO160956C
NO160956C NO83833002A NO833002A NO160956C NO 160956 C NO160956 C NO 160956C NO 83833002 A NO83833002 A NO 83833002A NO 833002 A NO833002 A NO 833002A NO 160956 C NO160956 C NO 160956C
Authority
NO
Norway
Prior art keywords
subscription
signals
synkron
suppression
timing
Prior art date
Application number
NO83833002A
Other languages
English (en)
Norwegian (no)
Other versions
NO833002L (no
NO160956B (no
Inventor
Robert O Banker
Original Assignee
Scientific Atlanta
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 Scientific Atlanta filed Critical Scientific Atlanta
Publication of NO833002L publication Critical patent/NO833002L/no
Publication of NO160956B publication Critical patent/NO160956B/no
Publication of NO160956C publication Critical patent/NO160956C/no

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/08—Error detection or correction by redundancy in data representation, e.g. by using checking codes
    • G06F11/10—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
    • G06F11/1008—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's in individual solid state devices
    • G06F11/1012—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's in individual solid state devices using codes or arrangements adapted for a specific type of error
    • G06F11/1028—Adjacent errors, e.g. error in n-bit (n>1) wide storage units, i.e. package error
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
    • H04N7/171—Systems operating in the amplitude domain of the television signal
    • H04N7/1713—Systems operating in the amplitude domain of the television signal by modifying synchronisation signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Television Systems (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
NO83833002A 1981-12-23 1983-08-19 Synkron undertrykkelse-scrambling av televisjonssignaler for abonnent-tv samt fremgangsmaate ved synkron undertrykkelses-scramblerabonnent-tv-system. NO160956C (no)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/334,040 US4466017A (en) 1981-12-23 1981-12-23 Sync suppression scrambling of television signals for subscription TV
PCT/US1982/001759 WO1983002378A1 (en) 1981-12-23 1982-12-15 Sync suppression scrambling of television signals for subscription tv

Publications (3)

Publication Number Publication Date
NO833002L NO833002L (no) 1983-08-19
NO160956B NO160956B (no) 1989-03-06
NO160956C true NO160956C (no) 1989-06-14

Family

ID=23305317

Family Applications (1)

Application Number Title Priority Date Filing Date
NO83833002A NO160956C (no) 1981-12-23 1983-08-19 Synkron undertrykkelse-scrambling av televisjonssignaler for abonnent-tv samt fremgangsmaate ved synkron undertrykkelses-scramblerabonnent-tv-system.

Country Status (9)

Country Link
US (1) US4466017A (ja)
EP (1) EP0096724B1 (ja)
JP (2) JPS59500040A (ja)
AT (1) ATE21474T1 (ja)
AU (1) AU549054B2 (ja)
CA (1) CA1194213A (ja)
DE (1) DE3272646D1 (ja)
NO (1) NO160956C (ja)
WO (1) WO1983002378A1 (ja)

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US6424716B1 (en) * 1998-12-15 2002-07-23 Macrovision Corp. Method and apparatus for improved horizontal and vertical overlay signals for greater concealment in modern TV sets
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Also Published As

Publication number Publication date
DE3272646D1 (en) 1986-09-18
CA1194213A (en) 1985-09-24
NO833002L (no) 1983-08-19
AU549054B2 (en) 1986-01-09
JPH0351357B2 (ja) 1991-08-06
JPS59500040A (ja) 1984-01-05
ATE21474T1 (de) 1986-08-15
JPH05244590A (ja) 1993-09-21
EP0096724B1 (en) 1986-08-13
NO160956B (no) 1989-03-06
WO1983002378A1 (en) 1983-07-07
EP0096724A1 (en) 1983-12-28
US4466017A (en) 1984-08-14
JP2601605B2 (ja) 1997-04-16

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