BR9003532A - Modulo decondificador e metodo para decodificacao de sinais de video codificados com supressao de sincronismo - Google Patents

Modulo decondificador e metodo para decodificacao de sinais de video codificados com supressao de sincronismo

Info

Publication number
BR9003532A
BR9003532A BR909003532A BR9003532A BR9003532A BR 9003532 A BR9003532 A BR 9003532A BR 909003532 A BR909003532 A BR 909003532A BR 9003532 A BR9003532 A BR 9003532A BR 9003532 A BR9003532 A BR 9003532A
Authority
BR
Brazil
Prior art keywords
decondifier
synchronism
suppression
module
video signals
Prior art date
Application number
BR909003532A
Other languages
English (en)
Inventor
Ralph P Harney
Michael L Hightowes
Anthony J Wechselberger
Original Assignee
Oak Industries Inc
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 Oak Industries Inc filed Critical Oak Industries Inc
Publication of BR9003532A publication Critical patent/BR9003532A/pt

Links

Classifications

    • 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
    • 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
    • H04N7/1716—Systems operating in the amplitude domain of the television signal by inverting the polarity of active picture signal portions

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Systems (AREA)
  • Synchronizing For Television (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Details Of Television Scanning (AREA)
  • Semiconductor Lasers (AREA)
BR909003532A 1989-07-21 1990-07-20 Modulo decondificador e metodo para decodificacao de sinais de video codificados com supressao de sincronismo BR9003532A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US38289989A 1989-07-21 1989-07-21

Publications (1)

Publication Number Publication Date
BR9003532A true BR9003532A (pt) 1991-08-27

Family

ID=23510887

Family Applications (1)

Application Number Title Priority Date Filing Date
BR909003532A BR9003532A (pt) 1989-07-21 1990-07-20 Modulo decondificador e metodo para decodificacao de sinais de video codificados com supressao de sincronismo

Country Status (14)

Country Link
EP (1) EP0409211B1 (pt)
JP (1) JP2635202B2 (pt)
AR (1) AR244481A1 (pt)
AT (1) ATE124833T1 (pt)
AU (1) AU621762B2 (pt)
BR (1) BR9003532A (pt)
CA (1) CA2020313C (pt)
DE (1) DE69020654T2 (pt)
DK (1) DK0409211T3 (pt)
ES (1) ES2077612T3 (pt)
GR (1) GR3017056T3 (pt)
IL (1) IL94988A0 (pt)
NO (1) NO179060C (pt)
PL (1) PL163971B1 (pt)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4222068A (en) * 1978-11-02 1980-09-09 American Television And Communications Corporation Subscription television apparatus and methods
US4338628A (en) * 1979-12-19 1982-07-06 Dynacom International, Inc. Scrambled video communication system
US4336553A (en) * 1980-05-14 1982-06-22 Oak Industries Method of coding audio and video signals
US4965825A (en) * 1981-11-03 1990-10-23 The Personalized Mass Media Corporation Signal processing apparatus and methods
JPS60103789A (ja) * 1983-11-10 1985-06-08 Sanyo Electric Co Ltd テレビジヨン信号のスクランブル方式
US4571615A (en) * 1983-06-10 1986-02-18 General Instrument Corporation Timing generator for sync suppressed television signals
US4815129A (en) * 1985-01-02 1989-03-21 General Instrument Corp. Video encryption system
JPS6260383A (ja) * 1985-09-10 1987-03-17 Matsushita Electric Ind Co Ltd 映像信号処理装置
JPS63122388A (ja) * 1986-11-12 1988-05-26 Hitachi Ltd 同期再生回路
US4928309A (en) * 1989-03-31 1990-05-22 General Instrument Corporation Method and apparatus for descrambling a television signal

Also Published As

Publication number Publication date
PL286151A1 (en) 1992-01-27
EP0409211B1 (en) 1995-07-05
JP2635202B2 (ja) 1997-07-30
CA2020313A1 (en) 1991-01-22
DE69020654T2 (de) 1995-11-30
EP0409211A2 (en) 1991-01-23
EP0409211A3 (en) 1992-06-03
GR3017056T3 (en) 1995-11-30
NO179060B (no) 1996-04-15
AR244481A1 (es) 1993-10-29
IL94988A0 (en) 1991-06-10
AU621762B2 (en) 1992-03-19
CA2020313C (en) 1996-06-11
PL163971B1 (pl) 1994-06-30
DK0409211T3 (da) 1995-11-20
NO903252L (no) 1991-01-22
ATE124833T1 (de) 1995-07-15
AU5890390A (en) 1991-01-24
JPH03101577A (ja) 1991-04-26
NO903252D0 (no) 1990-07-20
DE69020654D1 (de) 1995-08-10
NO179060C (no) 1996-08-28
ES2077612T3 (es) 1995-12-01

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Legal Events

Date Code Title Description
FB19 Grant procedure suspended (art. 19)
FF Decision: intention to grant
FG Letter patent granted
B21A Patent or certificate of addition expired [chapter 21.1 patent gazette]

Free format text: PATENTE EXTINTA EM 20/07/2005