BR0314730A - Aumento de largura de faixa compatìvel com sistema de televisão a cabo que usa canais digitais embutidos - Google Patents

Aumento de largura de faixa compatìvel com sistema de televisão a cabo que usa canais digitais embutidos

Info

Publication number
BR0314730A
BR0314730A BR0314730-4A BR0314730A BR0314730A BR 0314730 A BR0314730 A BR 0314730A BR 0314730 A BR0314730 A BR 0314730A BR 0314730 A BR0314730 A BR 0314730A
Authority
BR
Brazil
Prior art keywords
cable television
systems
built
television system
increased bandwidth
Prior art date
Application number
BR0314730-4A
Other languages
English (en)
Inventor
Leo W Hoarty
Walter S Ciciora
Ted E Hartson
Original Assignee
Dotcast 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 Dotcast Inc filed Critical Dotcast Inc
Publication of BR0314730A publication Critical patent/BR0314730A/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
    • H04N21/47—End-user applications
    • H04N21/478—Supplemental services, e.g. displaying phone caller identification, shopping application
    • H04N21/4782—Web browsing, e.g. WebTV
    • 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
    • H04N21/426—Internal components of the client ; Characteristics thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
    • H04N7/0803—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division using frequency interleaving, e.g. with precision offset
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
    • H04N7/0806—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division the signals being two or more video signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/10—Adaptations for transmission by electrical cable
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H04N7/17309—Transmission or handling of upstream communications
    • 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 program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
    • H04N21/4622—Retrieving content or additional data from different sources, e.g. from a broadcast channel and the Internet

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Television Systems (AREA)
  • Details Of Television Systems (AREA)

Abstract

"AUMENTO DE LARGURA DE FAIXA COMPATìVEL COM SISTEMA DE TELEVISãO A CABO QUE USA CANAIS DIGITAIS EMBUTIDOS". A presente invenção refere-se a várias concretizações da invenção que apresentam um aparelho, processos e sistemas para efetuarem um aumento na largura de faixa efetiva de uma instalação de distribuição de televisão a cabo em uma maneira compatível com os sistemas de televisão a cabo mais comuns. Com o uso dos processos e sistemas para simultaneamente transmitir um sinal de televisão analógico padrão e um sinal de dados digitais em uma maneira que minimize a interferência mútua, uma ou mais portadoras de dados podem ser embutidas dentro de um ou mais canais de televisão analógicos. Estes sinais combinados são então transmitidos transparentemente sobre a instalação de distribuição de televisão a cabo existente para uma localização no assinante ou próxima deste. Várias concretizações empregam então um dispositivo que decodifica um ou mais dos canais embutidos; seja na casa do assinante, seja em um nó vizinho que serve a uma pluralidade de casas. Certas concretizações suportam também a inclusão de um meio de armazenamento na casa ou nó vizinho, de modo que a programação de transmissão possa ser temporariamente armazenada, permitindo assim que o operador do sistema a cabo ofereça uma série de programação que o assinante pode 'interromper ou resumir' em grande parte na maneira em que os Gravadores de Vídeo Pessoais trabalham. Em todas as concretizações, os dados extraídos são então remodulados em um ou mais canais privados<39><39> (tipicamente 64 ou 256 QAM) e depois convertidos ativamente em freq³ências não-usadas que podem estar localizadas bem acima da freq³ência mais alta usada pelo operador de cabo para transmitir a programação para a casa, enquanto ainda é compatível com modems de cabo ou caixas de decodificação de cabo digital comerciais. As freq³ências usadas para os canais privados locais podem ser reutilizadas para outras casas e vizinhanças em uma maneira conhecida na técnica como 'multiplexação por divisão de espaço'. Desta maneira, uma capacidade de canal nova o suficiente é criada no sistema a cabo para suportar uma ampla variedade de programação nova incluindo serviços disponíveis e do tipo 'gravador de vídeo pessoal'. O conteúdo destes 'canais privados' localmente criados é então decodificado pela caixa de decodificação existente e emitido para um receptor de televisão padrão em uma maneira consistente com uma portadora digital de padrão industrial de cabo. Adicionalmente, um ou mais dos 'canais privados' poderiam ser remodulados em uma maneira compatível com o padrão de televisão a cabo DOCSIS (Interface de Serviço Digital sobre Cabo), a fim de serem desmodulados por um modem de cabo de faixa larga comercialmente disponível para o subseq³ente uso por um computador.
BR0314730-4A 2002-09-25 2003-09-24 Aumento de largura de faixa compatìvel com sistema de televisão a cabo que usa canais digitais embutidos BR0314730A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/255,799 US20030140351A1 (en) 1998-04-17 2002-09-25 Cable television system compatible bandwidth upgrade using embedded digital channels
PCT/US2003/030327 WO2004030359A1 (en) 2002-09-25 2003-09-24 Cable television system and method for compatible bandwidth upgrade using embedded digital channels

Publications (1)

Publication Number Publication Date
BR0314730A true BR0314730A (pt) 2005-08-02

Family

ID=32041753

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0314730-4A BR0314730A (pt) 2002-09-25 2003-09-24 Aumento de largura de faixa compatìvel com sistema de televisão a cabo que usa canais digitais embutidos

Country Status (10)

Country Link
US (1) US20030140351A1 (pt)
EP (1) EP1550306B1 (pt)
CN (1) CN100388777C (pt)
AT (1) ATE354253T1 (pt)
AU (1) AU2003276954A1 (pt)
BR (1) BR0314730A (pt)
CA (1) CA2500356A1 (pt)
DE (1) DE60311848T2 (pt)
MX (1) MXPA05003148A (pt)
WO (1) WO2004030359A1 (pt)

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CA2500356A1 (en) 2004-04-08
EP1550306B1 (en) 2007-02-14
ATE354253T1 (de) 2007-03-15
WO2004030359A1 (en) 2004-04-08
AU2003276954A1 (en) 2004-04-19
DE60311848T2 (de) 2007-11-22
MXPA05003148A (es) 2006-05-17
CN100388777C (zh) 2008-05-14
EP1550306A1 (en) 2005-07-06
DE60311848D1 (de) 2007-03-29
US20030140351A1 (en) 2003-07-24
CN1706190A (zh) 2005-12-07

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