BR0109835A - Sistema para a provisão de conteúdo embaralhado e sistema para o desembaralhamento de conteúdo embaralhado - Google Patents

Sistema para a provisão de conteúdo embaralhado e sistema para o desembaralhamento de conteúdo embaralhado

Info

Publication number
BR0109835A
BR0109835A BR0109835-7A BR0109835A BR0109835A BR 0109835 A BR0109835 A BR 0109835A BR 0109835 A BR0109835 A BR 0109835A BR 0109835 A BR0109835 A BR 0109835A
Authority
BR
Brazil
Prior art keywords
control word
scrambled content
ecm
scrambler
scrambled
Prior art date
Application number
BR0109835-7A
Other languages
English (en)
Inventor
Andrew Augustine Wajs
Original Assignee
Irdeto Access Bv
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 Irdeto Access Bv filed Critical Irdeto Access Bv
Publication of BR0109835A publication Critical patent/BR0109835A/pt

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
    • H04N21/26613—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel for generating or managing keys in general
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
    • H04N21/26606—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel for generating or managing entitlement messages, e.g. Entitlement Control Message [ECM] or Entitlement Management Message [EMM]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/418—External card to be used in combination with the client device, e.g. for conditional access
    • H04N21/4181—External card to be used in combination with the client device, e.g. for conditional access for conditional access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/4405—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving video stream decryption
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/462—Content or additional data management e.g. creating a master electronic programme guide from data received from the Internet and a Head-end or controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
    • H04N21/4623—Processing of entitlement messages, e.g. ECM [Entitlement Control Message] or EMM [Entitlement Management Message]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • 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
    • H04N7/1675—Providing digital key or authorisation information for generation or regeneration of the scrambling sequence
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/913—Television signal processing therefor for scrambling ; for copy protection
    • H04N2005/91357—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal
    • H04N2005/91364—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal the video signal being scrambled

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Television Signal Processing For Recording (AREA)
  • Storage Device Security (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

"SISTEMA PARA A PROVISãO DE CONTEúDO EMBARALHADO E SISTEMA PARA O DESEMBARALHAMENTO DE CONTEúDO EMBARALHADO". A presente invenção refere-se a um sistema para a provisão de conteúdo embaralhado, que compreende um gerador de palavra de controle, cada palavra de controle incluindo um identificador de palavra de controle, um embaralhador para a provisão de um fluxo de pacotes de dados embaralhados, e um dispositivo de encriptação, para a provisão de mensagens de controle de autorização (ECM's). Um ou mais pacotes consecutivos são embaralhados usando-se a mesma palavra de controle (CW). Cada pacote inclui um identificador de palavra de controle, que identifica a palavra de controle usada. O dispositivo de encriptação de ECM provê ECM's, incluindo uma palavra de controle anterior (CW~ p~), uma palavra de controle atual (CW~ c~) e uma próxima palavra de controle (CW~ n~). Um sistema para o desembaralhamento de conteúdo embaralhado compreende um desembaralhador para o desembaralhamento de conteúdo embaralhado e um dispositivo de desencriptação para a desencriptação de ECM's, para a obtenção de palavras de controle. O dispositivo de desencriptação de ECM envia palavras de controle para o desembaralhador e o desembaralhador desembaralha os pacotes de dados do conteúdo embaralhado usando uma palavra de controle, que tem um identificador de palavra de controle correspondente ao identificador de palavra de controle do pacote de dados a ser desembaralhado. O sistema ainda compreende um dispositivo de armazenamento, para o armazenamento de conteúdo embaralhado e um meio para controlar a exibição do conteúdo armazenado, indo para frente e indo para trás. O sistema é programado para extrair EMCs e proporcionar o EMCs para o dispositivo de desencriptação de EMC para desencriptação. O sistema é programado para requisitar que o dispositivo de desencriptação de ECM proveja pelo menos uma próxima palavra de controle (CW~ n~) na exibição ou indo para frente, e proveja pelo menos uma palavra de controle anterior (CW~ p~) e uma palavra de controle atual (CW~ c~) indo para trás.
BR0109835-7A 2000-04-07 2001-03-21 Sistema para a provisão de conteúdo embaralhado e sistema para o desembaralhamento de conteúdo embaralhado BR0109835A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP00201277A EP1143722B1 (en) 2000-04-07 2000-04-07 Data scrambling and descrambling system
PCT/EP2001/003186 WO2001078387A2 (en) 2000-04-07 2001-03-21 Data scrambling and descrambling system

Publications (1)

Publication Number Publication Date
BR0109835A true BR0109835A (pt) 2003-06-24

Family

ID=8171322

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0109835-7A BR0109835A (pt) 2000-04-07 2001-03-21 Sistema para a provisão de conteúdo embaralhado e sistema para o desembaralhamento de conteúdo embaralhado

Country Status (14)

Country Link
US (1) US7116892B2 (pt)
EP (1) EP1143722B1 (pt)
JP (1) JP4772252B2 (pt)
CN (1) CN1190077C (pt)
AU (1) AU2001260138B2 (pt)
BR (1) BR0109835A (pt)
CA (1) CA2405266C (pt)
DE (1) DE60040724D1 (pt)
ES (1) ES2315219T3 (pt)
HK (1) HK1041143B (pt)
MX (1) MXPA02009818A (pt)
TW (1) TW540240B (pt)
WO (1) WO2001078387A2 (pt)
ZA (1) ZA200209032B (pt)

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Also Published As

Publication number Publication date
EP1143722A1 (en) 2001-10-10
MXPA02009818A (es) 2003-03-27
AU2001260138B2 (en) 2003-12-18
HK1041143A1 (en) 2002-06-28
JP4772252B2 (ja) 2011-09-14
EP1143722B1 (en) 2008-11-05
WO2001078387A2 (en) 2001-10-18
US7116892B2 (en) 2006-10-03
AU6013801A (en) 2001-10-23
CN1421097A (zh) 2003-05-28
CA2405266C (en) 2010-05-25
HK1041143B (en) 2009-05-08
TW540240B (en) 2003-07-01
CN1190077C (zh) 2005-02-16
ES2315219T3 (es) 2009-04-01
JP2003530785A (ja) 2003-10-14
US20030152364A1 (en) 2003-08-14
CA2405266A1 (en) 2001-10-18
DE60040724D1 (de) 2008-12-18
ZA200209032B (en) 2003-08-28
WO2001078387A3 (en) 2002-10-24

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Legal Events

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B08F Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]

Free format text: REFERENTE A 13A ANUIDADE.

B08K Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]

Free format text: REFERENTE AO DESPACHO 8.6 PUBLICADO NA RPI 2260 DE 29/04/2014.