BR9912312A - Method and apparatus for generating a signal that overrides illegal cable boxes - Google Patents

Method and apparatus for generating a signal that overrides illegal cable boxes

Info

Publication number
BR9912312A
BR9912312A BR9912312-6A BR9912312A BR9912312A BR 9912312 A BR9912312 A BR 9912312A BR 9912312 A BR9912312 A BR 9912312A BR 9912312 A BR9912312 A BR 9912312A
Authority
BR
Brazil
Prior art keywords
signal
illegal
vertical
inhibition
level
Prior art date
Application number
BR9912312-6A
Other languages
Portuguese (pt)
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 BR9912312A publication Critical patent/BR9912312A/en

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
    • H04N7/169—Systems operating in the time domain of the television signal
    • H04N7/1693—Systems operating in the time domain of the television signal by displacing synchronisation signals relative to active picture signals or vice versa

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Television Systems (AREA)

Abstract

<B>MéTODO E APARELHO PARA GERAR UM SINAL QUE ANULA OS DECODIFICADORES A CABO ILEGAIS<D> Em decodificadores a cabo ilegais, limites ajustáveis são usados para proporcionar uma imagem estável ilegal. Mediante adição e/ou inserção de sinais verticais de bloqueio, isto é, não confiáveis, no intervalo de inibição vertical e em suas proximidades, o decodificador a cabo ilegal não pode sincronizar com um sinal vertical confiável. Como resultado dos sinais de bloqueio, o decodificador a cabo ilegal emite uma imagem ou sinal verticalmente instável e é mantida a ocultação. Os sinais de bloqueio são compatíveis com um decodificador a cabo autorizado e podem estar na forma de um sinal de rastrear e reter sinal por todo o intervalo vertical e suas proximidades. Em uma modalidade de um sinal vertical não confiável, um sinal modulado com uma faixa a partir aproximadamente do nível de inibição até aproximadamente o nível branco de pico é inserido e/ou adicionado no intervalo de inibição vertical e/ou suas proximidades. Para causar instabilidades horizontais no decodificador a cabo ilegal, o intervalo de inibição horizontal é modificado de tal modo que independente do nível de limite (isto é, abaixo do nível de inibição para detecção de sincronismo ou acima do nível de inibição para um sinal horizontal geralmente estável), um sinal de posição e/ou modulado é fatiado ou detectado.<B> METHOD AND APPARATUS TO GENERATE A SIGNAL THAT CANCEL THE ILLEGAL CABLE DECODERS <D> In illegal cable decoders, adjustable limits are used to provide an illegal stable image. By adding and / or inserting vertical blocking signals, that is, unreliable, in the vertical inhibition interval and in its vicinity, the illegal cable box cannot synchronize with a reliable vertical signal. As a result of the blocking signals, the illegal cable box emits a vertically unstable image or signal and concealment is maintained. Blocking signals are compatible with an authorized cable box and can be in the form of a signal to track and retain signal throughout the vertical range and its vicinity. In an unreliable vertical signal modality, a signal modulated with a range from approximately the inhibition level to approximately the peak white level is inserted and / or added to the vertical inhibition interval and / or its surroundings. To cause horizontal instabilities in the illegal cable box, the horizontal bypass interval is modified in such a way that regardless of the threshold level (that is, below the inhibition level for synchronism detection or above the inhibition level for a horizontal signal generally stable), a position and / or modulated signal is sliced or detected.

BR9912312-6A 1998-07-22 1999-07-20 Method and apparatus for generating a signal that overrides illegal cable boxes BR9912312A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US9370598P 1998-07-22 1998-07-22
US10004398P 1998-09-11 1998-09-11
PCT/US1999/012387 WO2000005894A1 (en) 1998-07-22 1999-07-20 Method and apparatus for generating a signal that defeats illegal cable decoders

Publications (1)

Publication Number Publication Date
BR9912312A true BR9912312A (en) 2001-05-08

Family

ID=26787825

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9912312-6A BR9912312A (en) 1998-07-22 1999-07-20 Method and apparatus for generating a signal that overrides illegal cable boxes

Country Status (4)

Country Link
AU (1) AU5203399A (en)
BR (1) BR9912312A (en)
TW (1) TW425822B (en)
WO (1) WO2000005894A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6839433B1 (en) * 1998-07-22 2005-01-04 Macrovision Corporation Method and apparatus for generating a signal that defeats illegal cable decoders

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU658014B2 (en) * 1991-11-19 1995-03-30 Macrovision Corporation Method and apparatus for scrambling and descrambling of video signals with edge fill
US5651065A (en) * 1995-03-09 1997-07-22 General Instrument Corporation Of Delaware Insertion of supplemental burst into video signals to thwart piracy and/or carry data
KR0179515B1 (en) * 1995-10-25 1999-05-01 이형도 Image signal encoding apparatus

Also Published As

Publication number Publication date
AU5203399A (en) 2000-02-14
WO2000005894A1 (en) 2000-02-03
TW425822B (en) 2001-03-11

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Legal Events

Date Code Title Description
B15K Others concerning applications: alteration of classification

Free format text: A CLASSIFICACAO ANTERIOR ERA: H04N 7/169

Ipc: H04N 7/167 (2011.01), H04N 7/083 (2006.01), H04N 7

B07A Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]
B09B Patent application refused [chapter 9.2 patent gazette]

Free format text: INDEFIRO O PEDIDO DE ACORDO COM ART. 8O COMBINADO COM ART. 13 DA LPI

B09B Patent application refused [chapter 9.2 patent gazette]

Free format text: MANTIDO O INDEFERIMENTO UMA VEZ QUE NAO FOI APRESENTADO RECURSO DENTRO DO PRAZO LEGAL.