BRPI0413480A - pré-processamento de dados de desembaralhamento para reduzir o tempo de alteração de canais - Google Patents

pré-processamento de dados de desembaralhamento para reduzir o tempo de alteração de canais

Info

Publication number
BRPI0413480A
BRPI0413480A BRPI0413480-0A BRPI0413480A BRPI0413480A BR PI0413480 A BRPI0413480 A BR PI0413480A BR PI0413480 A BRPI0413480 A BR PI0413480A BR PI0413480 A BRPI0413480 A BR PI0413480A
Authority
BR
Brazil
Prior art keywords
data
change time
channel
channel change
bit scrambling
Prior art date
Application number
BRPI0413480-0A
Other languages
English (en)
Inventor
Kevin Grimes
Original Assignee
Thomson Licensing
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 Thomson Licensing filed Critical Thomson Licensing
Publication of BRPI0413480A publication Critical patent/BRPI0413480A/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]
    • H04N21/40—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
    • H04N21/43—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
    • H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
    • H04N21/4383—Accessing a communication channel
    • 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
    • H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
    • H04N21/4332—Content storage operation, e.g. storage operation in response to a pause request, caching operations by placing content in organized collections, e.g. local EPG data repository
    • 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
    • H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
    • 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
    • H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
    • H04N21/4383—Accessing a communication channel
    • H04N21/4384—Accessing a communication channel involving operations to reduce the access time, e.g. fast-tuning for reducing channel switching latency

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Radio Relay Systems (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

"PRé-PROCESSAMENTO DE DADOS DE DESEMBARALHAMENTO PARA REDUZIR O TEMPO DE ALTERAçãO DE CANAIS". A presente invenção se refere a um aparelho e a um método para o recebimento de uma pluralidade de vídeo, áudio e dados digitais criptografados que requerem uma chave de criptossistema para decodificar antes de utilizar. Em termos específicos, a presente invenção se refere a dispositivos, tais como um sistema a cabo ou um sistema de satélite de difusão digital, que transmitem informações de múltiplos canais para receptores que provêm a usuários acesso aos múltiplos canais após uma seleção de canais em particular. Esta seleção de canais requer a decriptografia e a formatação de um novo fluxo de dados através de um processo eletrónico demorado. A presente invenção descrita diminui o tempo de alteração de canal por meio do monitoramento de dados desembaralhados no fundo, antes da seleção de um novo canal por parte de um usuário. Os dados de difusão digital contêm palavras de controle de desembaralhamento de entrada requeridas para a decodificação das chaves de desembaralhamento de N bits para cada qual dentre a multiplicidade de fluxos de dados digitais disponíveis. O armazenamento das palavras de controle de dados ou das chaves de desembaralhamento de N bits diminui o tempo de decodificação de recuperação subseqüente. No entanto, a utilização das palavras de controle para desembaralhar as chaves de desembaralhamento de N bits e em seguida o armazenamento das chaves de desembaralhamento de N bits tipicamente produzem um ganho maior na redução do tempo de alteração de canal.
BRPI0413480-0A 2003-08-13 2004-01-20 pré-processamento de dados de desembaralhamento para reduzir o tempo de alteração de canais BRPI0413480A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US49483503P 2003-08-13 2003-08-13
PCT/US2004/001573 WO2005020564A1 (en) 2003-08-13 2004-01-20 Pre-processing of descrambling data to reduce channel-change time

Publications (1)

Publication Number Publication Date
BRPI0413480A true BRPI0413480A (pt) 2006-10-17

Family

ID=34215903

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0413480-0A BRPI0413480A (pt) 2003-08-13 2004-01-20 pré-processamento de dados de desembaralhamento para reduzir o tempo de alteração de canais

Country Status (8)

Country Link
US (1) US20090153747A1 (pt)
EP (1) EP1661391A1 (pt)
JP (1) JP2007502575A (pt)
KR (1) KR20060060014A (pt)
CN (1) CN1868206A (pt)
BR (1) BRPI0413480A (pt)
MY (1) MY147161A (pt)
WO (1) WO2005020564A1 (pt)

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FR2954875B1 (fr) 2009-12-28 2012-01-27 Viaccess Sa Procedes de dechiffrement, de transmission et de reception de mots de controle, support d'enregistrement et serveur pour ces procedes
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US8793745B2 (en) * 2010-04-14 2014-07-29 Hughes Network Systems, Llc Method and apparatus for data rate controller for a code block multiplexing scheme
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EP2566157A1 (en) * 2011-09-02 2013-03-06 Nagravision S.A. Method to optimize reception of entitlement management messages in a Pay-TV system
GB2500613A (en) * 2012-03-26 2013-10-02 Sony Corp Audio/visual receiver that can receive non-viewing information via a transmission channel that is not currently in use.
US10700944B2 (en) 2012-06-07 2020-06-30 Wormhole Labs, Inc. Sensor data aggregation system
US10649613B2 (en) 2012-06-07 2020-05-12 Wormhole Labs, Inc. Remote experience interfaces, systems and methods
US10489389B2 (en) 2012-06-07 2019-11-26 Wormhole Labs, Inc. Experience analytic objects, systems and methods
US9106965B2 (en) 2012-12-27 2015-08-11 Echostar Technologies L.L.C. Using idle resources to reduce channel change times
US9854306B2 (en) 2014-07-28 2017-12-26 Echostar Technologies L.L.C. Methods and systems for content navigation among programs presenting advertising content
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US11277390B2 (en) 2015-01-26 2022-03-15 Listat Ltd. Decentralized cybersecure privacy network for cloud communication, computing and global e-commerce
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US9635413B2 (en) * 2015-09-23 2017-04-25 Echostar Technologies L.L.C. Advance decryption key acquisition for streaming media content
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Also Published As

Publication number Publication date
KR20060060014A (ko) 2006-06-02
CN1868206A (zh) 2006-11-22
MY147161A (en) 2012-11-14
EP1661391A1 (en) 2006-05-31
JP2007502575A (ja) 2007-02-08
WO2005020564A1 (en) 2005-03-03
US20090153747A1 (en) 2009-06-18

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Legal Events

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

Free format text: REFERENTE A 8A 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 2159 DE 22/05/2012.