PT1662791E - Sistema guia de programas de televisão interactivo sobre uma base cliente-servidor com gravação em servidor à distância - Google Patents
Sistema guia de programas de televisão interactivo sobre uma base cliente-servidor com gravação em servidor à distância Download PDFInfo
- Publication number
- PT1662791E PT1662791E PT60752748T PT06075274T PT1662791E PT 1662791 E PT1662791 E PT 1662791E PT 60752748 T PT60752748 T PT 60752748T PT 06075274 T PT06075274 T PT 06075274T PT 1662791 E PT1662791 E PT 1662791E
- Authority
- PT
- Portugal
- Prior art keywords
- program
- user
- program guide
- programs
- media server
- Prior art date
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- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/445—Receiver circuitry for the reception of television signals according to analogue transmission standards for displaying additional information
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- 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
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- 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
- H04N7/17318—Direct or substantially direct transmission and handling of requests
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- 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
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- Engineering & Computer Science (AREA)
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- General Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Television Signal Processing For Recording (AREA)
- Television Systems (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
Description
ΕΡ 1 662 791/PT DESCRIÇÃO "Sistema guia de programas de televisão interactivo sobre uma base cliente-servidor com gravação em servidor à distância"
ANTECEDENTES DO INVENTO
Este invento refere-se a sistemas guia de programas de televisão interactivos e, mais em particular, a sistemas guia de programas de televisão interactivos gue permitem gue os utilizadores gravem programas e dados de guia de programas num servidor de meios.
Sistemas de televisão por cabo, satélite e difusão munem os espectadores com um grande número de canais de televisão. Os espectadores, tradicionalmente, consultam agendas de programas de televisão impressas para determinarem os programas que são emitidos num horário em particular. Mais recentemente, foram desenvolvidos guias de programas de televisão interactivos que permitem que seja exibida informação de programas de televisão numa televisão de utilizador. Os guias de programas de televisão interactivos permitem que o utilizador navegue através de listagens de programas de televisão com a utilização de um controlo à distância. Num guia de programas típico, vários grupos de listagens de programas de televisão são exibidos em categorias predefinidas ou definidas pelo utilizador. As listagens são, tipicamente, exibidas numa lista, grelha ou tabela.
Listagens de programas e outros dados de guias de programas são, tipicamente, disponibilizados por uma instalação de ligação ascendente de satélite para uma quantidade de equipamentos terminais de sistema de cabo. Cada equipamento terminal distribui os dados de guia de programa para uma quantidade de utilizadores. Guias de programa de televisão interactivos são, tipicamente, implementados em equipamentos de descodificação de sinal de utilizador. Um equipamento de descodificação de sinal está ligado a uma televisão de utilizador e a um gravador de videocassete. Os sistemas guia de programas que permitem que os utilizadores gravem programas estão descritos, por exemplo, no pedido de 2 ΕΡ 1 662 791/PT patente U.S. Ellis et al. No. de série 08/924.239, apresentado a 5 de Setembro de 1997.
Sistemas deste tipo apresentam uma quantidade de aspectos inconvenientes. As capacidades de processamento e de armazenamento do equipamento de descodificação de sinal e do gravador de videocassete são, em geral, limitadas. Isto, por sua vez, pode limitar a funcionalidade do guia. Gravadores de videocassetes podem aumentar, de forma significativa, o custo do equipamento de televisão doméstico. Os mesmos são sistemas mecânicos, propensos a falhas, e o seu funcionamento adequado baseia-se, em parte, na configuração adequada dos mesmos pelos utilizadores (isto é, lembrarem-se de colocar nos mesmos uma fita de gravação) . A configuração de um VCR para trabalhar de forma coordenada com um guia de programas pode ser um processo complexo em alguns sistemas e pode frustrar os utilizadores. Além disso, os utilizadores não podem gravar múltiplos programas em simultâneo sem terem múltiplos VCR e gravar um programa enquanto assistem a outro, tipicamente, obriga a suporte físico adicional ou a um equipamento de descodificação de sinal melhorado. Sistemas em que guias de programas permitem que os utilizadores gravem um programa enquanto assistem a outro estão descritos, por exemplo, no pedido de patente U.S. Lemmons et al. No. de série 60/089.487, apresentado a 16 de Junho de 1998.
Sistemas que utilizam tecnologia de disco rígido para armazenarem programas também foram desenvolvidos. Sistemas guia de programas de televisão interactivos que têm dispositivos de armazenamento digital estão descritos, por exemplo, no pedido de patente U.S. Hassell et al. No. de série 09/157.256, apresentado a 17 de Setembro de 1998. Produtos baseados em disco rígido também foram desenvolvidos por TiVo, Inc. de Sunnyvale, Califórnia e Replay Networks, Inc. de Mountainview, Califórnia. Estes sistemas apresentam inconvenientes porque os mesmos necessitam de suporte físico adicional em casa do utilizador que pode aumentar de forma significativa o custo do equipamento de televisão em casa do utilizador. Sistemas deste tipo também não permitem que os utilizadores gravem múltiplos programas, em simultâneo, sem terem múltiplos dispositivos em casa. 3
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Algumas plataformas de televisão actuais permitem um percurso de retorno entre os equipamentos de descodificação de sinal e os equipamentos terminais. Foram desenvolvidos guias de programas sobre uma base cliente-servidor em que os equipamentos de descodificação de sinal actuam como clientes que comunicam com servidores localizados em equipamentos terminais através de percursos de retorno. Os servidores, tipicamente, disponibilizam informação de listagens de programas (por exemplo, títulos de programas e horários de emissão) para os equipamentos de descodificação de sinal em resposta a solicitações que são geradas pelos equipamentos de descodificação de sinal.
Sistemas de vídeo a pedido (VOD) também foram desenvolvidos. Estes sistemas, tipicamente, gravam todos os programas que são distribuídos por um equipamento terminal ou apenas um subconjunto escolhido de programas. Numa abordagem anterior, grandes quantidades de armazenamento são necessárias no servidor para se garantir que todos os vídeos que possam ser desejados pelos utilizadores estarão disponíveis. Na abordagem mais recente, os utilizadores estão limitados a visualizarem apenas aqueles programas cujo operador do equipamento terminal decidiu gravar.
Num sistema de televisão por cabo conhecido como "The Box", os espectadores podem chamar um operador de cabo para solicitarem a exibição de um vídeo musical particular de um arquivo de vídeos musicais. Os vídeos solicitados são difundidos num canal dedicado para todos os espectadores verem. Esta abordagem sofre de uma quantidade de inconvenientes. Primeiro, os utilizadores não têm a comodidade de escolherem programas que utilizam o seu equipamento de televisão. Além disso, os espectadores têm de esperar pela exibição de selecções de outros espectadores antes das suas serem exibidas. Também, os espectadores estão limitados a seleccionarem vídeos apenas daqueles que estão arquivados. Alguns espectadores podem desejar vídeos musicais que não estão partilhados no arquivo. Estes espectadores não têm forma de seleccionar um vídeo para arquivo ou visualizar outros vídeos. 4
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Num sistema de televisão por cabo conhecido como "Your Choice TV", são repetidos programas de televisão que foram emitidos anteriormente num conjunto dedicado de canais de televisão. Os espectadores podem seleccionar uma repetição de um programa a partir de uma pequena taxa. No entanto, as repetições são emitidas em horários agendados, o que pode não ser cómodo para o espectador. Também, programas desejados podem não estar disponíveis para os espectadores devido ao operador do sistema de cabo decidir que programas gravar. É, portanto, um objecto do presente invento disponibilizar um sistema guia de programas que permita que os utilizadores orientem um servidor para gravar certos programas que posteriormente podem ser reproduzidos para o utilizador a pedido.
SUMÁRIO DO INVENTO
Este e outros objectos do presente invento são concretizados de acordo com os princípios do presente invento como definido nas reivindicações.
Outras características do invento, a sua natureza e várias vantagens ficarão mais evidentes a partir dos desenhos em anexo e da seguinte descrição detalhada das concretizações preferidas.
BREVE DESCRIÇÃO DOS DESENHOS A Fig. 1 é um diagrama de blocos esquemático de um sistema ilustrativo de acordo com o presente invento.
As Figs. 2a a 2e são diagramas esquemáticos que mostram arquitecturas ilustrativas para o equipamento de guia de programas interactivo da Fig. 1 de acordo com o presente invento. A Fig. 3 é um diagrama esquemático que mostra uma arquitectura ilustrativa para o armazenamento das Figs. 2a a 2e de acordo com o presente invento. 5
ΕΡ 1 662 791/PT A Fig. 4 é um diagrama esquemático que mostra uma arquitectura ilustrativa de directorias de meios mantidas pelos dispositivos de armazenamento da Fig. 3. A Fig. 5 é um diagrama de fluxo de dados ilustrativo que mostra como os programas são gravados.
As Figs. 6a e 6b são diagramas que ilustram a utilização de apontadores de utilizador para reprodução de um único programa para múltiplos utilizadores de acordo com o presente invento. A Fig. 7 é um diagrama de blocos esquemático de uma arquitectura ilustrativa para o equipamento de televisão de utilizador das Figs. 2a a 2e de acordo com o presente invento. A Fig. 8 mostra uma arquitectura ilustrativa para o controlo remoto da Fig. 7 de acordo com o presente invento. A Fig. 9 é um diagrama de blocos esquemático generalizado de partes do equipamento de televisão de utilizador ilustrativo da Fig. 7 de acordo com o presente invento. A Fig. 10 mostra um ecrã de menu principal ilustrativo que pode ser exibido pelo guia de programas para munir os utilizadores com acesso a várias funções de guia de programas de acordo com o presente invento. A Fig. 11a mostra um ecrã de listagens de programas ilustrativo em que as listagens de programas são exibidas no tempo de acordo com o presente invento. A Fig. 11b mostra um ecrã de listagens de programas ilustrativo em que as listagens de programas são exibidas por canal de acordo com o presente invento. A Fig. 11c mostra um ecrã de listagens de programas ilustrativo em que as listagens de programas são exibidas por categoria de acordo com o presente invento. 6
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As Fig. 12a e 12b mostram ecrãs de exibição de guias de programas ilustrativos em que listagens de programas de visualização paga são exibidos de acordo com o presente invento. A Fig. 13a mostra uma exibição FOLHEAR ilustrativa que pode ser exibida pelo guia de programas quando um utilizador muda de canais de acordo com o presente invento. A Fig. 13b mostra uma exibição PESQUISAR ilustrativa que o guia de programas pode exibir quando um utilizador indica uma vontade de pesquisar através de listagens de programas para canais diferentes daquele a que um utilizador está a assistir de acordo com o presente invento. A Fig. 14a mostra uma sobreposição de gravação ilustrativa que pode ser exibida pelo guia de programas quando um utilizador indica uma vontade de gravar o programa de acordo com o presente invento. A Fig. 14b mostra uma sobreposição de gravação ilustrativa que pode ser exibida pelo guia de programas enquanto um utilizador está num ecrã de exibição de guia de programas. A sobreposição pode ser exibida quando um utilizador indica uma vontade de gravar um programa.
As Figs. 14c e 14d mostram sobreposições de gravação ilustrativas que indicam um custo para gravar um programa e que mune um utilizador com uma oportunidade para confirmar a gravação. A Fig. 14e mostra uma sobreposição ilustrativa que o guia de programas pode exibir quando um utilizador indica uma vontade de gravar um programa que é parte de um grupo de programas. A Fig. 15a mostra uma sobreposição para encomendar uma visualização paga ilustrativa. A Fig. 15b mostra uma sobreposição de confirmação de encomenda de uma visualização paga ilustrativa. 7
ΕΡ 1 662 791/PT A Fig. 16 mostra uma sobreposição de gravação ilustrativa que o guia de programas pode exibir quando um utilizador selecciona um programa para gravação que tem cópia protegida. A Fig. 17 mostra um ecrã de exibição de guia de programas ilustrativo para munir um utilizador com uma oportunidade de encomendar um pacote de programas de visualização paga. A Fig. 18a mostra uma sobreposição de directorias ilustrativa que pode ser exibida pelo guia de programas enquanto um utilizador está a ver televisão. A sobreposição pode ser exibida quando um utilizador indica uma intenção de ver uma directoria de programas que foram gravados para um utilizador no servidor de meios à distância das Figs. 2a a 2e ou no servidor de meios local da Fig. 7. A Fig. 18b mostra uma sobreposição de directorias ilustrativa que pode ser exibida pelo guia de programas enquanto um utilizador está num ecrã de exibição de guia de programas. A sobreposição pode ser exibida quando um utilizador indica uma intenção de ver uma directoria de programas que foram gravados para um utilizador no servidor de meios à distância das Figs. 2a a 2e ou no servidor de meios local da Fig. 7. A Fig. 18c mostra uma sobreposição de directorias ilustrativa que pode ser exibida pelo guia de programas enquanto um utilizador está num ecrã de exibição em que listagens são exibidas por categoria de acordo com o presente invento. A Fig. 18d mostra um ecrã de directorias ilustrativo que pode ser exibido pelo guia de programas quando um utilizador indica uma intenção de aceder a uma directoria de programas gravados para um utilizador no servidor de meios à distância das Figs. 2a a 2e ou no servidor de meios local da Fig. 7. A Fig. 18e mostra um ecrã de menu de directorias ilustrativo que o guia de programas pode exibir quando um utilizador indica uma intenção de aceder a vários ecrãs de 8 ΕΡ 1 662 791/ΡΤ directorias, tais como o mostrado na Fig. 14d, mas em que listagens de programas gravados são ordenados de várias formas. A Fig. 18f mostra um ecrã de directorias ilustrativo de programas que um utilizador seleccionou para gravação através de um servidor de meios mas que não foram gravados ainda. A Fig. 19 mostra uma sobreposição ilustrativa que o guia de programas pode exibir quando um utilizador indica uma intenção de reproduzir um programa. A sobreposição indica um custo para a reprodução. A Fig. 20 é um ecrã de informação maximizado, ilustrativo que pode ser exibido pelo guia de programas quando um utilizador indica uma intenção de ver informação num programa que foi gravado para um utilizador no servidor de meios à distância das Figs. 2a a 2e. A Fig. 21 mostra uma sobreposição ilustrativa que o guia de programas pode exibir quando um utilizador indica uma intenção de gravar ou reproduzir um programa que está protegido por modo parental. A Fig. 22 mostra uma sobreposição ilustrativa para munir utilizadores com controlo de um programa gravado no servidor de meios à distância das Figs. 2a a 2e ou no servidor de meios local da Fig. 7. A Fig. 23 mostra uma sobreposição ilustrativa que o guia de programas pode exibir quando um utilizador indica uma intenção de armazenar de forma temporária, em tempo real, um programa no servidor de meios à distância das Figs. 2a a 2e ou no servidor de meios local da Fig. 7. A Fig. 24 mostra um ecrã de configuração ilustrativo em que um utilizador pode configurar várias configurações para gravação de programas em exibição ou programas em reprodução a partir do servidor de meios à distância das Figs. 2a a 2e ou do servidor de meios local da Fig. 7. 9
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As Figs. 25a e 25b são ecrãs de super programas ilustrativos para munir os utilizadores com uma oportunidade para definirem super programas de acordo com o presente invento. A Fig. 26 é um fluxograma de uma vista global ilustrativa de passos envolvidos na gravação de programas e de dados de guia de programas associados no servidor de meios à distância das Figs. 2a a 2e ou no servidor de meios local da Fig. 7 de acordo com o presente invento. A Fig. 27 é um fluxograma com mais algum detalhe de passos ilustrativos envolvidos na gravação de programas e de dados de guia de programas associados no servidor de meios à distância das Figs. 2a a 2e ou no servidor de meios local da Fig. 7 de acordo com o presente invento. A Fig. 28 é um fluxograma de uma vista global ilustrativa de passos envolvidos na reprodução de programas e de dados de guia de programas associados a partir do servidor de meios à distância das Figs. 2a a 2e ou do servidor de meios local da Fig. 7 de acordo com o presente invento. A Fig. 29 é um fluxograma com mais algum detalhe de passos ilustrativos envolvidos na reprodução de programas e de dados de guia de programas associados a partir do servidor de meios à distância das Figs. 2a a 2e ou do servidor de meios local da Fig. 7 de acordo com o presente invento. A Fig. 30 é um fluxograma de passos ilustrativos envolvidos em munir um utilizador com acesso a cópias de programas armazenadas de forma temporária, em tempo real, de acordo com o presente invento. A Fig. 31 é um fluxograma de passos ilustrativos envolvidos em munir um utilizador com a oportunidade para definir e reproduzir super programas de acordo com o presente invento. 10
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DESCRIÇÃO DETALHADA DAS CONCRETIZAÇÕES PREFERIDAS
Um sistema 10 ilustrativo de acordo com os princípios do presente invento é mostrado na Fig. 1. A instalação principal 12 disponibiliza dados de guia de programas a partir da fonte de dados de guia de programas 14 para equipamento de televisão 17 de guia de programas interactivo através da ligação 18. Existem, de preferência, numerosas peças ou instalações de equipamento de televisão 17 de guia de programas interactivo, cada qual ligada à instalação principal 12 por uma ligação de comunicações 18 respectiva apesar de apenas uma destas peças ou instalação de equipamento de televisão 17 de guia de programas interactivo estar mostrada na Fig. 1 para evitar complicar muito o desenho. A ligação 18 pode ser uma ligação por satélite, uma ligação por rede telefónica, uma ligação por cabo ou por fibra óptica, uma ligação por micro ondas, uma ligação por Internet, uma combinação destas ligações ou qualquer outra ligação por comunicações adequada. Se for desejado transmitir sinais de vídeo sobre a ligação 18 para além dos sinais de dados, uma ligação de largura de banda relativamente elevada, tal como uma ligação por satélite, pode ser, em geral, preferida a uma ligação de largura de banda relativamente baixa, tal como uma linha telefónica.
Os dados de guia de programas transmitidos pela instalação principal 12 para equipamento de televisão 17 de guia de programas interactivos pode incluir dados de programação de televisão (por exemplo, identificadores de programas, horários, canais, títulos e descrições) e outros dados para serviços diferentes das listagens de programas de televisão (por exemplo, texto de ajuda, informação para visualização paga, informação meteorológica, informação desportiva, informação de canal de música, ligações Web de Internet associadas, suporte lógico associado, etc.). Os dados de guia de programas também podem incluir identificadores únicos para cada exibição de cada programa, identificadores para grupos de programas (por exemplo, séries, mini séries, pacotes de programas para encomenda, etc.) ou qualquer outro identificador adequado. Conforme 11 ΕΡ 1 662 791/PT utilizado aqui "programa" e "programação" de televisão significam qualquer tipo de programa ou anúncio que ocorra num canal de televisão normal, premium, de visualização paga, música ou de outro tipo de canal de televisão e pode incluir filmes, programas de visualização paga, eventos desportivos, programas de música, anúncios comerciais e qualquer outro tipo adequado de programa de televisão.
Equipamento de televisão 17 de guia de programas interactivo pode ser ligado ao sistema de facturação 199 através de ligação de comunicações 197. A ligação de comunicações 197 pode ser qualquer ligação de comunicações adequada, tal como uma ligação série, ligação em paralelo, ligação (USB) por bus série universal, uma ligação telefónica, ligação de rede informática, ligação de Internet ou qualquer outra ligação de comunicações adequada. 0 sistema de facturação 199 recebe informação do equipamento de televisão 17 de guia de programas interactivo relativa a programas que são encomendados, gravados ou reproduzidos em equipamento de televisão 17 de guia de programas interactivo. 0 sistema de facturação 199 pode ser qualquer sistema informático adequado para facturação para utilizadores ou crédito e débito em contas de utilizadores com base na informação recebida do equipamento de televisão 17 de guia de programas interactivo.
Um guia de programas de televisão interactivo está implementado em equipamento de televisão 17 de guia de programas interactivo. Cinco arquitecturas ilustrativas para equipamento de televisão 17 de guia de programas interactivo são mostradas nas Figs. 2a a 2e. Como mostrado, equipamento de televisão 17 de guia de programas interactivo pode incluir equipamento de distribuição 21 de guia de programas localizado na instalação de distribuição 16 de guia de programas e em equipamento de televisão de utilizador 22. 0 guia de programas de televisão interactivo pode ser executado, na totalidade, em equipamento de televisão de utilizador 22 através da utilização das arquitecturas das Figs. 2a e 2c ou pode ser executado parcialmente em equipamento de televisão de utilizador 22 e parcialmente em equipamento de televisão 17 de guia de programas interactivo 12 ΕΡ 1 662 791/ΡΤ através da utilização de uma arquitectura cliente servidor adequada ou de processamento distribuído, tal como as mostradas nas Figs. 2b e 2d. A instalação de distribuição 16 de guia de programas pode ser qualquer instalação de distribuição adequada e pode ter equipamento de distribuição 21. 0 equipamento de distribuição 21 das Figs. 2a, 2b, 2c e 2d é equipamento adequado para disponibilizar dados de guia de programas para equipamento de televisão de utilizador 22 sobre o percurso de comunicações 20. O equipamento de distribuição 21 pode incluir, por exemplo, suporte físico de transmissão adequado para distribuição de dados de guia de programas sobre uma banda de canal de televisão, no intervalo de supressão do feixe vertical de um canal de televisão, através da utilização de um sinal digital em banda, através da utilização de um sinal digital fora de banda ou através de qualquer outra técnica de transmissão de dados adequada. Sinais de vídeo digitais ou analógicos (por exemplo, programas de televisão) podem também ser distribuídos por equipamento de distribuição 21 para equipamento de televisão de utilizador 22 através de percursos de comunicações 20 sobre múltiplos canais de televisão. Em alternativa, vídeos podem ser distribuídos para equipamento de televisão de utilizador 22 a partir de qualquer outra instalação de distribuição adequada, tal como um equipamento terminal de sistema de cabo, uma instalação de distribuição de difusão, uma instalação de distribuição de televisão por satélite ou qualquer outro tipo adequado de instalação de distribuição de televisão.
Percursos de comunicações 20 podem ser quaisquer percursos de comunicações adequados para distribuição de dados de guia de programas. Percursos de comunicações 20 podem incluir, por exemplo, uma ligação por satélite, uma ligação por rede telefónica, uma ligação por cabo ou fibra óptica, uma ligação por micro onda, uma ligação por Internet, uma ligação de especificação de interface de serviço de dados sobre cabo (DOCSIS), uma combinação de ligações deste tipo ou qualquer outra ligação por comunicações adequada. Os percursos de comunicações 20 têm, de preferência, largura de banda suficiente para permitirem que a instalação de 13 ΕΡ 1 662 791/ΡΤ distribuição 16 de guia de programas ou qualquer outra instalação de distribuição distribua programação de televisão para equipamento de televisão de utilizador 22. Existem, tipicamente, múltiplas peças de equipamento de televisão de utilizador 22 e múltiplos percursos de comunicações 20 associados, apesar de apenas uma peça de equipamento de televisão de utilizador 22 e de percurso de comunicações 20 serem mostradas nas Figs. 2a a 2d para evitar complicar muito os desenhos. Se desejado, os dados de guia de programas e de programação de televisão podem ser disponibilizados sobre percursos de comunicações separados. A Fig. 2b mostra uma arquitectura ilustrativa para equipamento de televisão 17 de guia de programas interactivo num sistema guia de programas interactivo distribuído ou baseado em cliente servidor. Como mostrado na Fig. 2b, o equipamento de distribuição 21 pode incluir servidor de guia de programas 25. O servidor de guia de programas 25 pode utilizar qualquer combinação adequada de suporte lógico e suporte físico para disponibilizar um guia de programas baseado em cliente servidor. Um servidor 25 de guia de programas pode, por exemplo, executar um motor de base de dados adequado (por exemplo, SQL Server da Microsoft) e disponibilizar dados de guia de programas em resposta a consultas geradas por um cliente de guia de programas implementado sobre equipamento de televisão de utilizador 22. Se desejado, o servidor de guia de programas 25 pode estar localizado na instalação principal 12, ou noutra localização, tal como num equipamento terminal de sistema de cabo, numa instalação de distribuição de difusão, numa instalação de distribuição de televisão por satélite, ou em qualquer outro tipo adequado de instalação de distribuição de televisão. O guia de programas pode recuperar dados de guia de programas a partir do servidor de guia de programas 25 através da utilização de qualquer abordagem baseada em cliente servidor adequada. O guia de programas pode, por exemplo, passar pedidos SQL como mensagens para o servidor de guia de programas 25. Noutra abordagem adequada, o guia de programas pode invocar procedimentos à distância que residem no servidor de guia de programas 25 através da utilização de uma ou mais chamadas de procedimentos à distância. O servidor 14 ΕΡ 1 662 791/PT de guia de programas 25 pode executar instruções SQL para este tipo de procedimentos invocados à distância. Ainda noutra abordagem adequada, objectos cliente executados pelo guia de programas podem comunicar com objectos servidor executados pelo servidor de guia de programas 25 através da utilização, por exemplo, de um agente de requisição de objectos (ORB). Isto pode envolver a utilização, por exemplo, de uma abordagem de modelo de objecto de componente distribuído (DCOM) da Microsoft. 0 guia de programas implementado em equipamento de televisão 17 de guia de programas interactivo pode comunicar com o servidor de guia de programas 25 sobre o percurso de comunicações 20 através da utilização de quaisquer protocolos de camada de transporte e de rede adequados, se desejado. Os mesmos podem comunicar, por exemplo, através da utilização de uma pilha de protocolos que inclui camadas de comutação sequencial de pacotes / comutação de pacotes entre redes (SPX/IPX), camadas de protocolo de controlo de transmissão / protocolo Internet (TCP/IP), camadas de protocolo de transacção Appletalk / Protocolo de entrega de datagramas, DOCSIS ou quaisquer outros protocolos de camada de transporte e de rede adequados.
As Figs. 2c e 2d mostram sistemas guia de programas de televisão interactivo baseados em Internet, ilustrativos. A instalação de distribuição 16 de televisão pode, por exemplo, incluir o sistema de serviço de Internet 61. O sistema de serviço de Internet 61 pode utilizar qualquer combinação adequada de suporte físico e de suporte lógico capaz de disponibilizar dados de guia de programas para o guia através da utilização de uma abordagem baseada em Internet (por exemplo, o protocolo de transferência de hiper texto (HTTP)). Se desejado, o sistema de serviço de Internet 61 pode estar localizado numa instalação que está separada da instalação de distribuição 16 de guia de programas.
Se o guia de programas estiver implementado no equipamento de televisão de utilizador 22 do equipamento de televisão 17 de guia de programas interactivo como mostrado na Fig. 2c, o sistema de serviço de Internet 61 (ou outro equipamento adequado na instalação de distribuição 16 de guia 15 ΕΡ 1 662 791/PT de programas que esteja ligado ao sistema de serviço de Internet 61) pode disponibilizar dados de guia de programas para o equipamento de televisão de utilizador 22 através da Internet ou através de equipamento de distribuição 21 de guia de programas através da utilização de qualquer abordagem baseada em Internet adequada (por exemplo, através da utilização da ligação do tipo de protocolo de transferência de hipertexto (HTTP) sobre um protocolo de controlo de transmissão / protocolo de Internet (TCP/IP)) . Se o guia de programas implementado no equipamento de televisão 17 de guia de programas interactivo for um guia cliente servidor como mostrado na Fig. 2d, o servidor de guia de programas 25 pode obter dados de guia de programas a partir do sistema de serviço de Internet 61. 0 guia de programas pode também, no entanto, obter dados de guia de programas a partir do sistema de serviço de Internet 61 através de uma ligação de Internet.
Noutra arquitectura adequada, o equipamento de distribuição 21 pode incluir equipamento informático ou outro suporte físico adequado onde é implementada uma primeira parte ou versão do guia de programas de televisão interactivo. Uma segunda parte ou versão do guia de programas pode ser implementada sobre o equipamento de televisão de utilizador 22. As duas versões ou partes do guia de programas interactivo podem comunicar através da utilização de qualquer esquema de comunicações ponto a ponto adequado (por exemplo, mensagens, chamadas de procedimento à distância, etc.) e da execução de funções guia de programas interactivo de forma distribuída entre a instalação de distribuição de televisão 16 e o equipamento de televisão de utilizador 22.
Outra arquitectura adequada em que um guia de programas em linha está implementado em equipamento de televisão 17 de guia de programas interactivo é mostrada na Fig. 2e. Sistemas guia de programas em linha estão descritos, por exemplo, no pedido de patente U.S. Boyer et al. N° de série 08/938.028, apresentado em 18 de Setembro de 1997. O utilizador pode ter um computador pessoal (PC) 231 onde está implementado um motor de pesquisa Web ou cliente de guia de programas. O computador pessoal 231 pode estar ligado ao sistema de serviços de Internet 235 através da ligação de Internet 233. O sistema de serviço de Internet 233 pode utilizar qualquer 16 ΕΡ 1 662 791/ΡΤ combinação adequada de suporte físico e suporte lógico informático capaz de disponibilizar uma aplicação ou sítio Web de servidor de guia de programas em linha. 0 sistema de serviço de Internet 235 pode estar ligado ao servidor de meios à distância 24 da instalação de distribuição 16 de guia de programas. Noutras arquitecturas adequadas, a funcionalidade de gravação e de reprodução do servidor de meios à distância 24 pode estar incorporada no sistema de serviço de Internet 235 se o sistema de serviço de Internet 235 tiver circuitos de processamento, memória e armazenamento adequados.
Dados de guia de programas e de programas podem ser gravados e reproduzidos a pedido através do servidor de meios à distância 24 em resposta a pedidos de gravar e reproduzir. Pedidos de gravar e reproduzir podem ser gerados através de uma aplicação de servidor de guia de programas ou de uma aplicação Web implementada no sistema de serviço de Internet 235. Pedidos de gravar e reproduzir também podem ser gerados por um cliente guia de programas interactivo implementado no computador pessoal 231 e podem ser disponibilizados para o servidor de meios à distância 24 pelo sistema de serviço de Internet 235. Dados de guias de programas e de programas podem ser disponibilizados pelo sistema de serviço de Internet 235 para o computador pessoal 231 através da utilização de uma abordagem de vídeo em Internet em tempo real adequada (por exemplo, através da utilização do "M-Bone") ou podem ser descarregados e armazenados pelo computador pessoal 231 para reprodução. 0 servidor de meios à distância 24 das Figs. 2a, 2b, 2c, 2d e 2e grava programas, dados de guia de programas ou qualquer combinação adequada dos mesmos e fornece qualquer deles ou ambos para o equipamento de televisão de utilizador 22 em resposta a pedidos gerados pelo guia de programas. 0 servidor de meios à distância 24 também pode gravar dados associados a programas, tais como dados transportados no intervalo de supressão do feixe vertical (VBI) de um canal de televisão analógico ou numa pista de dados digitais num canal de televisão digital. Exemplos de dados associados a programas são legendas, pistas de texto, pistas de informação 17
ΕΡ 1 662 791/PT musical, formatos de vídeo suplementares, línguas suplementares ou outros dados suplementares. Como utilizado aqui, gravação e reprodução de "programação" ou de "programas" podem incluir, mas não necessariamente, gravação e reprodução de dados associados a programas. 0 servidor de meios à distância 24 está mostrado como estando localizado na instalação de distribuição 16 de guias de programas, mas pode estar localizado numa instalação de distribuição separada (por exemplo, um equipamento terminal de sistema de cabo, uma instalação de distribuição por difusão, uma instalação de distribuição de televisão por satélite, ou qualquer outro tipo adequado de instalação de distribuição de televisão). 0 servidor de meios à distância 24 pode ser baseado em qualquer combinação adequada de suporte físico e de suporte lógico adequados para gravação e reprodução de dados de guia de programas ou de programas a pedido. Como definido aqui, a frase "gravação a pedido" refere-se à gravação de dados de guia de programas ou de programas em resposta a uma selecção do utilizador de um programa para gravação. A gravação real de um programa não necessita de ocorrer ao mesmo tempo que é feita uma selecção deste tipo. Por exemplo, um programa pode ser seleccionado para gravação antes da sua hora de emissão agendada e pode ser gravado quando o programa seleccionado está a ser emitido. 0 servidor de meios à distância 24 pode incluir circuitos de processamento 11, memória 13 e armazenamento 15. Os circuitos de processamento 11 podem incluir qualquer processador adequado, tal como um microprocessador ou grupo de microprocessadores e outros circuitos de processamento tais como circuitos de memória temporária, circuitos de acesso directo a memória (DMA), circuitos de digitalização e circuitos de entrada/saída (E/S). Os circuitos de processamento 11 também podem incluir circuitos adequados para descodificar programas e ficheiros de dados armazenados no armazenamento 15 e converter os mesmos em sinais de vídeo adequados para distribuição pelo equipamento de distribuição 21. Se a programação for armazenada como ficheiros MPEG-2 "Grupo de peritos em imagem animada" (MPEG) , os circuitos de processamento 11 podem incluir, por exemplo, um descodificador de MPEG-2 para descodificar os ficheiros e 18
ΕΡ 1 662 791/PT converter os mesmos em vídeo do Comité de normas de televisão nacional (NTSC). Noutra abordagem adequada, os circuitos de processamento passam os ficheiros MPEG-2 para o equipamento de distribuição 21 para distribuição a utilizadores como uma sequência de dados MPEG-2. A sequência de dados MPEG-2 pode ser descodificada e exibida pelo equipamento de televisão de utilizador 22. A memória 13 pode ser qualquer memória adequada para armazenamento temporário e armazenamento de código de programação para realizar as funções dos circuitos de processamento 11. A memória 13 pode ser utilizada para armazenamento temporário de programas de vídeo, partes de programas de vídeo ou dados de guia de programas para circuitos de processamento 11 enquanto os programas estão a ser reproduzidos ou gravados. 0 armazenamento 15 pode ser qualquer armazenamento adequado para gravação de ficheiros de programação e dados de guia de programas associados. Uma arquitectura adequada para o armazenamento 15 é mostrada na Fig. 3. A arquitectura de armazenamento da Fig. 3 é apenas ilustrativa. 0 armazenamento 15 pode incluir qualquer meio e sistema de armazenamento gravável, adequado. 0 armazenamento 15 pode incluir, por exemplo, uma série de fitas 51, uma torre de armazenamento óptico 53, séries redundantes de discos independentes (RAID) 55, qualquer outro sistema de armazenamento em massa adequado ou qualquer combinação adequada dos mesmos. A série de fitas 51 pode incluir qualquer série de fitas de armazenamento em massa de alta velocidade adequada, tal como uma série de fitas de 8 mm. A série de fitas 51 pode salvaguardar ou arquivar programas armazenados na torre de armazenamento óptico 53 ou RAID 55. A torre de armazenamento óptico 53 pode ser qualquer sistema de armazenamento óptico gravável adequado. A torre de armazenamento óptico 53 pode, por exemplo, gravar programas em discos compactos graváveis (CD) ou discos versáteis digitais (DVD). Durante a reprodução, programas e dados armazenados na torre de armazenamento óptico 53 podem ser de armazenados, forma temporária, em memória virtual (por exemplo, ficheiros de permuta, "swap") em RAID 55 para 19 ΕΡ 1 662 791/PT utilização pela memória 13 ou podem ser disponibilizados directamente para a memória 13 (por exemplo, por circuitos DMA adequados nos circuitos de processamento 11) para descodificação. 0 armazenamento 15 pode ser medido na ordem de centenas de gigabytes, terabytes ou mais. Apesar disto poder envolver uma quantidade considerável de recursos, o armazenamento 15 pode, mesmo assim, necessitar de menos espaço de armazenamento do que um sistema que gravou todos os programas (ou um grande subconjunto dos mesmos) distribuído por equipamentos terminais de rede para cada intervalo de tempo de programação. Devido ao presente sistema, tipicamente, necessitar de gravar apenas aqueles programas que são seleccionados por utilizadores, programas menos populares não necessitam de ser gravados de forma rotineira, o que reduz as necessidades de armazenamento global do sistema. 0 armazenamento 15 também pode ser inferior ao armazenamento total que seria mantido por todos os utilizadores nas suas casas se cada utilizador gravasse as suas próprias cópias de programas de forma individual. 0 servidor de meios à distância 24 pode atribuir uma quantidade específica de armazenamento para cada utilizador se desejado. Esta quantidade pode ser fixa ou pode ser configurável.
Programas gravados podem ser referenciados por apontadores que são mantidos numa ou mais directorias. Uma directoria de apontadores para cada utilizador, por exemplo, pode ser armazenada na memória 13 ou RAID 55. Directorias de utilizador também podem ser mantidas localmente pelos guias de programas. Uma arquitectura ilustrativa para directorias de utilizador e outras directorias é mostrada na Fig. 4. Cada directoria de utilizador 59 pode incluir um identificador para cada programa que tenha sido gravado para o utilizador e um apontador para o dispositivo de armazenamento onde cada programa foi gravado originalmente. Neste exemplo, os programas 1 e 3 foram originalmente gravados na torre de armazenamento óptico 53. Os programas 4 e 2 foram originalmente gravados no RAID 55. Os programas também podem ser gravados na série de fitas 51 e diferentes partes de um único programa podem ser gravadas em diferentes dispositivos de armazenamento se desejado mas estes aspectos do invento 20 ΕΡ 1 662 791/ΡΤ não estão mostrados na Fig. 4 para evitar complicar muito o desenho.
Cada dispositivo de armazenamento pode manter uma directoria de meios 61 e um armazenamento de meios 63. Como utilizado aqui, um armazenamento de meios é qualquer partição física ou virtual de um dispositivo de armazenamento ou meio de armazenamento que é utilizado para armazenar programas, dados de guia de programas ou qualquer combinação adequada dos mesmos e pode também incluir um dispositivo de armazenamento ou meio de armazenamento completo com uma ou sem partições. Cada directoria de meios 61 pode incluir uma lista de programas gravados pelo dispositivo de armazenamento. Cada directoria de meios 61 pode também incluir apontadores para onde os programas estão armazenados no armazenamento de meios 63. Se desejado, a série de fitas 51 pode ser utilizada para arquivar programas que estejam armazenados na torre de armazenamento óptico 53 ou RAID 55 durante um período de tempo predefinido (por exemplo, um mês). Além disso, os programas podem ser arquivados pela torre de armazenamento óptico 53 para RAID 55 (não mostrado). O PROGRAMA 3 é um exemplo de um programa que foi arquivado pela série de fitas 51. Uma entrada de directoria de meios 61 pode reflectir o arquivo ao apontar para uma entrada de directoria de meios 61 na série de fitas 51, se desejado. O servidor de meios à distância 24 grava programas e dados de guia de programas associados no armazenamento 15 em resposta a pedidos de gravação gerados pelo guia de programas implementado no equipamento de televisão 17 de guia de programas interactivo. Como definido aqui, um "pedido de gravação" é qualquer comando, pedido, mensagem, chamada de procedimento à distância, comunicação baseada em objecto ou qualquer outro tipo de comunicação inter-processo ou inter-objecto que permita que o guia de programas comunique informação sobre o programa que o utilizador deseja gravar no servidor de meios.
Um diagrama de fluxo de dados ilustrativo que mostra como os programas podem ser gravados pelo servidor de meios à distância 24 é mostrado na Fig. 5. Pedidos de gravação gerados por guias de programas implementados no equipamento 21 ΕΡ 1 662 791/ΡΤ de televisão 17 de guia de programas interactivo podem ser colocados na lista de pedidos 110 para consolidação. O consolidador 115 pode ser um processo que é executado no servidor de meios à distância 24. 0 consolidador 115 consolida múltiplos pedidos de gravação para os mesmos programas e coloca tarefas de gravação de grupo e individuais na lista de tarefas 120.
Na prática, pode não ser desejável gravar um programa salvo se um certo número de utilizadores o solicitou. Num período predefinido de tempo antes da emissão do programa solicitado, o consolidador 115 pode verificar a lista de tarefas 120 para ver se utilizadores suficientes solicitaram o programa. Se não existirem utilizadores suficientes, o consolidador 115 pode gerar uma mensagem que é devolvida ao utilizador ou utilizadores solicitantes pelo equipamento de distribuição 21. Quando o guia de programas recebe uma mensagem destas, o guia de programas pode notificar o utilizador de que o programa não está a ser gravado. Em alternativa, o guia de programas pode solicitar que o programa seja gravado por um servidor de meios local, tal como o servidor de meios local 29 da Fig. 6, ou pode, ele próprio, gravar o programa num dispositivo de armazenamento.
Entradas ilustrativas 121 na lista de tarefas 120 são também mostradas na Fig. 5. As entradas 121 podem incluir, por exemplo, as datas, horas de início e horas de conclusão (ou durações), canais e identificadores de programa para os programas que foram seleccionados para gravação no servidor de meios à distância 24. As entradas também podem incluir listas para os utilizadores que seleccionaram cada programa para gravação. A Fig. 5 mostra, por exemplo, que o PROGRAMA 2 foi seleccionado para gravação pelo utilizador 1 e pelo utilizador 2. Se um programa for popular, numerosos utilizadores podem solicitar que o mesmo seja gravado. O gravador 125 pode ser um processo que é executado no circuito de processamento 11 de um servidor de meios à distância 24 que é adequado para monitorar a lista de tarefas 120 e gravar programas no armazenamento 15. Os circuitos de processamento 11 do servidor de meios à distância 24 podem incluir, por exemplo, um ou mais sintonizadores, 22
ΕΡ 1 662 791/PT codificadores digitais ou descodificadores digitais para sintonizar, ou de qualquer outro modo, seleccionar a programação disponibilizada pelo equipamento de distribuição 21 e formatar os programas para gravação pelo servidor de meios à distância 24. Qualquer combinação adequada de sintonizadores analógicos e digitais e descodificadores é daqui em diante referida como sintonizadores para simplificar a explicação. 0 gravador 125 pode orientar um ou mais sintonizadores para canais particulares (analógico ou digital) em instantes particulares com base em entradas na lista de tarefas 120. Neste exemplo, o gravador 125 pode orientar um primeiro sintonizador para sintonizar o canal 4 a 21 de Dezembro de 1999 para gravar o PROGRAMA 1 para o utilizador 1. O gravador 125 também pode orientar um segundo sintonizador para sintonizar o canal 5 ao mesmo tempo para gravar o PROGRAMA 2 para o utilizador 1 e para o utilizador 2. O limite superior do número de sintonizadores necessários para o servidor de meios à distância 24 pode ser o número de canais distribuídos pelo equipamento de distribuição 21. Estes sintonizadores podem ser baseados em circuitos de sintonia e descodificação implementados com a utilização de um ou mais circuitos integrados.
Se desejado, o gravador 125 pode orientar os circuitos de processamento 11 para codificarem a programação e os dados de guia de programas como ficheiros digitais (por exemplo, ficheiros MPEG-2) ou como uma sequência de dados digitais (por exemplo, uma sequência de dados MPEG-2). O armazenamento 15 pode gravar as sequências de dados ou ficheiros através da utilização, por exemplo, de técnicas de DMA adequadas. Os circuitos de processamento 11 podem comprimir as sequências de dados ou ficheiros digitais através da utilização de qualquer algoritmo de compressão digital adequado, se desejado. O dispositivo de armazenamento onde um programa foi gravado pode alimentar o gravador 125 com um apontador para a entrada na directoria de meios 61 para o programa gravado. Isto pode ser feito de forma automática ou em resposta a uma consulta gerada pelo gravador 125. Se as directorias de utilizador 59 (Fig. 4) forem mantidas pelo servidor de meios à distância 24, o gravador 125 pode colocar entradas nas 23 ΕΡ 1 662 791/PT directorias de utilizador 59 dos utilizadores que seleccionaram o programa para gravação. Se forem mantidas localmente cópias de directorias de utilizador 59 pelos guias de programas, os guias de programas podem, por exemplo, descarregar as directorias de utilizador através do servidor de guia de programas 25 ou através da utilização de qualquer outra abordagem adequada. Em alternativa, o guia de programas pode apenas descarregar apontadores para as entradas de directoria de meios. Se as directorias de utilizador 59 forem mantidas exclusivamente pelos guias de programas, os guias de programas podem receber o apontador para a directoria de meios 61 onde o programa está listado de forma automática em resposta ao pedido de gravação, depois emitir um pedido adequado para o apontador ou através da utilização de qualquer outra abordagem adequada. 0 servidor de meios à distância 24 recupera programas do armazenamento 15 em resposta aos pedidos de recuperação gerados pelos guias de programas implementados no equipamento de televisão 17 de guia de programas interactivo. Os circuitos de processamento 11 podem processar os pedidos através da pesquisa de uma directoria de utilizador 59 do utilizador para os programas solicitados e então emitir um comando (ou pedido) de recuperação adequado para o armazenamento 15 com base no apontador na directoria. Por exemplo, quando o utilizador 1 solicita a reprodução do PROGRAMA 1, os circuitos de processamento 11 emitem um comando de recuperação adequado para a torre de armazenamento óptico 53. 0 programa é recuperado do armazenamento de meios 63 e pode ser passado para a memória 13 (por exemplo, através dos circuitos de DMA nos circuitos de processamento 11) para descodificação pelos circuitos de processamento 11 e distribuição para o equipamento de televisão de utilizador 22. Se desejado, os circuitos de processamento podem passar um programa solicitado na sua forma digital para o equipamento de distribuição 21 para distribuição para o equipamento de televisão de utilizador 22.
Se um programa solicitado foi arquivado (por exemplo, armazenado num dispositivo de armazenamento diferente daquele onde o programa foi originalmente armazenado) , o dispositivo de armazenamento original pode emitir um comando de 24 ΕΡ 1 662 791/ΡΤ recuperação adequado para o dispositivo de armazenamento de arquivo em resposta a comandos (ou pedidos) gerados pelos circuitos de processamento 11. Por exemplo, quando o utilizador 1 solicita a recuperação do PROGRAMA 3 para reprodução, os circuitos de processamento 11 podem emitir um comando de recuperação para a torre de armazenamento óptico 53 . A torre de armazenamento óptico 53, por sua vez, examina a sua directoria de meios 61, determina que o PROGRAMA 3 foi arquivado e emite um pedido de recuperação para a sequência de fitas 51. A sequência de fitas 51 recupera o programa do seu armazenamento de meios 63 e transmite o mesmo para a torre de armazenamento óptico 53 através da utilização de qualquer interligação adequada (por exemplo, uma ligação em paralelo, uma ligação de interface para pequenos sistemas informáticos (SCSI) (por exemplo, SCSI-2 alargado, SCSI-2 alargado, rápido, ultra SCSI-3, etc.), uma ligação de bus série universal (USB) ou qualquer outra ligação adequada). Em alternativa, o dispositivo de arquivo, neste exemplo a série de fitas 51, pode transferir o programa directamente para a memória 13 (por exemplo, através de circuitos DMA nos circuitos de processamento 11). Se desejado, os circuitos de processamento 11 podem determinar se um programa foi arquivado e podem emitir um pedido de recuperação para a sequência de fitas 51.
Durante a operação de sistema, múltiplos utilizadores podem solicitar a reprodução de um único programa de modo que a reprodução do programa para um utilizador se sobreponha à reprodução do programa para outro utilizador. 0 servidor de meios à distância 24 pode, em simultâneo, reproduzir o mesmo programa para um número de utilizadores através, por exemplo, da atribuição de um apontador para cada utilizador que aponte para a posição de visualização actual do utilizador no programa. Uma abordagem adequada pode envolver o arquivo temporário de todo o programa ou de partes do mesmo na forma digital na memória 13.
As Figs. 6a e 6b ilustram como os apontadores podem ser utilizados para, em simultâneo, reproduzirem o mesmo programa para múltiplos utilizadores. Depois do servidor de meios à 25 ΕΡ 1 662 791/ΡΤ distância 24 receber um pedido para um programa, o servidor de meios à distância 24 atribui um apontador ao utilizador solicitante e recupera todo ou uma parte do programa solicitado. A Fig. 6a ilustra um servidor de meios à distância 24 que armazena de forma temporária um filme completo de duas horas que está a ser reproduzido, em simultâneo, para três utilizadores. A Fig. 5b ilustra o servidor de meios à distância 24 que armazena de forma temporária uma quantidade predeterminada (por exemplo, 15 minutos) de um filme solicitado para cada um dos três utilizadores. À medida que o filme avança, o servidor de meios à distância 24 pode incrementar cada apontador do utilizador. 0 servidor de meios à distância 24 também pode pré-descodificar uma quantidade predeterminada de tempo (por exemplo, os 5 minutos seguintes) do programa para que à medida que um apontador do utilizador avance, o vídeo esteja pronto para distribuição pelo equipamento de distribuição 21. Se um utilizador rebobina um filme, o servidor de meios à distância 24 pode retroceder o apontador do utilizador (isto é, deslocar o mesmo para a esquerda) e pré-descodificar uma parte anterior do filme.
Se um servidor de meios à distância 24 armazena de forma temporária apenas partes de um programa como mostrado na Fig. 6b, o mesmo pode apenas armazenar de forma temporária uma única cópia de cada parte na memória 13. À medida que o utilizador 1 avança o filme em direcção ao minuto 15, por exemplo, o servidor de meios à distância 24 pode verificar para ver se os minutos de 15 a 30 já estão armazenados de forma temporária. Neste exemplo os mesmos estão e a cópia (para a qual aponta o utilizador 2) pode ser utilizada para o utilizador um. Se os minutos de 15 a 30 não estiverem já armazenados de forma temporária, o servidor de meios 25 pode pré-pesquisar e carregar os mesmos e pré-descodificar uma quantidade adequada (por exemplo, 5 minutos) para que a sequência de vídeo para o utilizador 1 não seja interrompida. Se desejado, o servidor de meios 25 pode, de forma continua, pré-pesquisar e carregar os 15 minutos seguintes (ou menos) de dados. 26
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Os dados de guia de programas e os vídeos gravados podem ser distribuídos pelo equipamento de distribuição 21 para o equipamento de televisão de utilizador 22 como um sinal de vídeo analógico adequado (por exemplo, vídeo NTSC) ou num formato digital adequado (por exemplo, como ficheiros MPEG-2 ou como uma sequência de dados MPEG-2) através de qualquer abordagem adequada. Por exemplo, programas e dados de guia de programas podem ser reproduzidos pelo servidor de meios 24 e distribuídos para o equipamento de televisão de utilizador 22 para visualização em tempo real. Se programas e dados de guia de programas forem distribuídos como sequência de dados digital, o equipamento de televisão de utilizador 22 pode descodificar a sequência de dados em tempo real. Estes programas e dados de guia de programas a pedido podem ser reproduzidos de acordo com preferências que forem definidas pelo utilizador. Numa segunda abordagem adequada, programas e dados de guia de programas são distribuídos como um ou mais ficheiros digitais ou como uma sequência de dados digitais e são armazenados pelo equipamento de televisão de utilizador 22 para reprodução. Numa terceira abordagem adequada, programas e dados de guia de programas são reproduzidos pelo servidor de meios à distância 24 e distribuídos de acordo com uma agenda sobre um canal analógico ou digital através da utilização de uma abordagem próxima de vídeo a pedido (NVOD) adequada. Ainda noutra abordagem adequada, o servidor de meios à distância 24 pode gravar programas e dados de guia de programas em meios físicos, tais como um DVD ou videocassete, que são enviados para o utilizador. Qualquer combinação destas abordagens ou qualquer outra abordagem adequada, também pode ser utilizada.
Uma arquitectura ilustrativa para equipamento de televisão de utilizador 22 é mostrada na Fig. 7. 0 equipamento de televisão de utilizador 22 da Fig. 7 recebe vídeo analógico ou uma sequência de vídeo digital de uma instalação de distribuição na entrada 26. Dados da instalação de distribuição 16 de guia de programas são também recebidos na entrada 26. Durante a visualização normal de televisão, o utilizador sintoniza o equipamento de descodificação de sinal 28 para um canal de televisão desejado (analógico ou digital). 0 sinal para aquele canal de televisão é então disponibilizado na saída de vídeo 30. O sinal disponibilizado 27 ΕΡ 1 662 791/PT na saída 30 é tipicamente quer um sinal de rádio frequência (RF) num canal predefinido (por exemplo, canal 3 ou 4) ou um sinal de vídeo desmodulado analógico, mas pode também ser um sinal digital disponibilizado para a televisão 36 num bus digital adequado (por exemplo, um bus que utiliza a norma 1394 (IEEE) do Instituto de engenheiros de electrotecnia e electrónica, (não mostrado)). O sinal de vídeo na saída 30 é recebido pelo dispositivo de armazenamento secundário opcional 32. O guia de programas de televisão interactivo ou o cliente de guia de programas pode ser executado no equipamento de descodificação de sinal 28, na televisão 36, no dispositivo de armazenamento digital opcional 31 (se a televisão 36 ou o dispositivo de armazenamento digital opcional 31 tiverem circuitos de processamento e memória adequados), ou num receptor digital ou analógico adequado ligado à televisão 36. O guia de programas de televisão interactivo também pode ser executado de forma cooperativa tanto na televisão 36 como no equipamento de descodificação de sinal 28. Sistemas de aplicação de televisão interactiva em que uma aplicação de guia de programas de televisão interactivo é executada em múltiplos dispositivos são descritos, por exemplo, no pedido de patente U.S. Ellis No. de série 09/186.598, apresentado a 5 de Novembro de 1998. O dispositivo de armazenamento secundário 32 pode ser qualquer tipo adequado de leitor ou dispositivo de armazenamento de programas digital ou analógico (por exemplo, um gravador de videocassete, um leitor de disco de vídeo digital (DVD), etc.). Gravação de programas e outras funcionalidades podem ser controladas pelo equipamento de descodificação de sinal 28 através da utilização do percurso de controlo 34. Se o dispositivo de armazenamento secundário 32 for um gravador de videocassete, por exemplo, um percurso de controlo típico 34 envolve a utilização de um transmissor por infravermelhos ligado ao receptor por infravermelhos no gravador de videocassete que normalmente aceita comandos de um controlo à distância tal como o controlo à distância 40. 0 controlo à distância 40 pode ser utilizado para controlar o equipamento de descodificação de sinal 28, o dispositivo de armazenamento secundário 32 e a televisão 36. 28
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Se desejado, o utilizador pode gravar programas, dados de guia de programas ou uma combinação dos mesmos, em forma digital, no dispositivo de armazenamento digital 31 opcional. 0 dispositivo de armazenamento digital 31 pode ser um dispositivo de armazenamento óptico com possibilidade de escrita (tal como um leitor de DVD capaz de lidar com discos graváveis DVD), um dispositivo de armazenamento magnético (tal como uma unidade de disco ou fita digital) ou qualquer outro dispositivo de armazenamento digital. Sistemas guia de programas de televisão interactivos que tenham dispositivos de armazenamento digital são descritos, por exemplo, no pedido de patente Hassell et ai. No. de série 09/157.256, apresentado a 17 de Setembro de 1998, que é aqui incorporado por referência na sua integralidade. O dispositivo de armazenamento digital 31 pode estar contido no equipamento de descodificação de sinal 28 ou pode estar num dispositivo externo ligado ao equipamento de descodificação de sinal 28 através de um porto de saída e interface adequada. O dispositivo de armazenamento digital 31 pode, por exemplo, estar contido no servidor de meios local 29. Se necessário, os circuitos de processamento no equipamento de descodificação de sinal 28 formatam sinais de vídeo, áudio e sinais de dados recebidos num formato de ficheiro digital. De preferência, o formato de ficheiro é um formato de ficheiro aberto tal como a norma MPEG-2 "Grupo de peritos em imagem animada" (MPEG) ou a norma do "Grupo de peritos em fotografia animada" (MJPEG). Os dados resultantes são enviados em sequência para o dispositivo de armazenamento digital 31 através de um bus adequado (por exemplo, um bus que utiliza a norma 1394 (IEEE) Instituto de engenheiros de electrotecnia e electrónica) e são armazenados no dispositivo de armazenamento digital 31. Noutra abordagem adequada, uma sequência de dados MPEG-2 ou série de ficheiros pode ser recebida do equipamento de distribuição 21 e armazenada no dispositivo de armazenamento digital 31. Por exemplo, ficheiros da instalação de distribuição 16 de televisão para programas gravados pelo utilizador com a utilização do servidor de meios à distância 24 podem ser armazenados. Estes ficheiros digitais podem ser reproduzidos para o utilizador quando desejado. 29 ΕΡ 1 662 791/ΡΤ
Em sistemas guia de programas típicos, o dispositivo de armazenamento secundário 32 ou o dispositivo de armazenamento digital 31 são necessários para munir os utilizadores com a capacidade de gravarem programas. Estes dispositivos de armazenamento são desnecessários, na prática, para o presente invento devido aos utilizadores poderem gravar programas no servidor de meios à distância 24. Na prática, estes dispositivos de armazenamento podem ser omitidos do equipamento de televisão de utilizador 22 com efeito mínimo ou sem efeito na funcionalidade do guia de programas, enquanto tende também a minimizar o custo do equipamento de televisão de utilizador 22. A televisão 36 recebe sinais de vídeo do dispositivo de armazenamento secundário 32 através do percurso de comunicações 38. Os sinais de vídeo no percurso de comunicações 38 podem ser gerados quer pelo dispositivo de armazenamento secundário 32 quando se reproduz um meio de armazenamento pré-gravado (por exemplo, uma videocassete ou um disco de vídeo digital gravável), pelo dispositivo de armazenamento digital 31 quando se reproduz um vídeo digital pré-gravado (por exemplo, um vídeo para um programa que foi gravado pelo utilizador no servidor de meios à distância 24 ou no servidor de meios local 29), podem ser passados através do equipamento de descodificação de sinal 28, podem ser disponibilizados directamente para a televisão 36 através do equipamento de descodificação de sinal 28 se o dispositivo de armazenamento secundário 32 não estiver incluído no equipamento de televisão de utilizador 22 ou podem ser recebidos directamente pela televisão 36. Durante a visualização normal de televisão, os sinais de vídeo disponibilizados para a televisão 36 correspondem ao canal desejado para o qual o utilizador sintonizou o equipamento de descodificação de sinal 28. Sinais de vídeo também podem ser disponibilizados para a televisão 36 pelo equipamento de descodificação de sinal 28 quando o equipamento de descodificação de sinal 28 é utilizado para reproduzir informação armazenada no dispositivo de armazenamento digital 31 ou quando o equipamento de descodificação de sinal 28 é utilizado para descodificar uma sequência de vídeo digital ou 30 ΕΡ 1 662 791/PT ficheiros digitais transmitidos da instalaçao de distribuição 16 de televisão. O equipamento de descodificação de sinal 28 pode ter o dispositivo de comunicações 37 para comunicar directamente com o servidor de guia de programas 25, com o servidor de meios à distância 24 ou com o sistema de serviço de Internet 61 através do percurso de comunicações 20. O dispositivo de comunicações 37 também pode permitir comunicações entre o equipamento de televisão de utilizador 22 e o servidor de meios local 29 através do percurso de comunicações 167 se desejado. O percurso de comunicações 167 pode ser qualquer ligação adequada, tal como uma ligação série ou paralela, ligação de rede, uma ligação de Internet, ligação DOCSIS, ligação rádio, ligação por infravermelhos ou qualquer outra ligação adequada cablada, analógica ou digital sem fios. O dispositivo de comunicações 37 pode ser um modem (por exemplo, qualquer norma adequada analógica ou digital, móvel, ou modem de cabo) , uma carta de interface de rede (por exemplo, uma carta Ethernet, carta "token ring", etc.) ou outro dispositivo de comunicações adequado. O dispositivo de comunicações 37 também pode ser um computador pessoal com uma ligação à Internet tal como com as arquitecturas mostradas nas Figs. 2c e 2d. A televisão 36 também pode ter um equipamento de comunicações adequado deste tipo se desejado. Numa abordagem alternativa, o equipamento de televisão de utilizador 22 pode comunicar com o servidor de meios à distância 24 ou com o sistema de serviço de Internet 61 através do equipamento de distribuição 21 com a utilização de um percurso de retorno adequado ou percurso de comunicações 20. O guia de programas pode comunicar com o servidor de guia de programas 25, com o servidor de meios à distância 24 ou com o sistema de serviço de Internet 61 através do percurso de comunicações 20 com a utilização de quaisquer protocolos de camada de transporte e de rede adequados, se desejado. Uma pilha de protocolos também pode ser utilizada que inclua, por exemplo, camadas de comutação sequencial de pacotes / comutação de pacotes entre redes (SPX/IPX), camadas de protocolo de controlo de transmissão / protocolo Internet 31 ΕΡ 1 662 791/ΡΤ (TCP/IP), camadas de protocolo de transacção Appletalk / Protocolo de entrega de datagramas (ATP/DDP), ou quaisquer outros protocolos de camadas de transporte e de rede adequados. Se desejado DOCSIS também pode ser utilizado. Estes protocolos também podem ser utilizados para comunicação com o servidor de meios local 29, mas na prática outros protocolos adequados podem ser utilizados para comunicar com o servidor 29, tal como o protocolo de rede Jini da Sun Microsystems. 0 servidor de meios local 29 pode ser um dispositivo na casa do utilizador que é adequado para armazenar e reproduzir programas a pedido. 0 servidor de meios local 29 pode ser, por exemplo, um computador pessoal ligado ao equipamento de descodificação de sinal 28 através de uma ligação de Ethernet, porto paralelo ou série padrão, bus série universal, de um bus IEEE 1394, etc. 0 servidor de meios local 29 pode ter circuitos de processamento 33, memória 35 e armazenamento 37. Os circuitos de processamento 33 podem incluir qualquer processador adequado, tal como um microprocessador ou grupo de microprocessadores e outros circuitos de processamento tais como circuitos de armazenamento temporário, circuitos de acesso directo a memória (DMA) e circuitos de entrada/saída (E/S). Os circuitos de processamento 33 também podem incluir circuitos adequados para gravação de programas a pedido. Os circuitos de processamento 33 também podem incluir circuitos adequados para descodificação de programas e ficheiros de dados armazenados no armazenamento 37 e conversão dos mesmos em sinais de vídeo adequados para reprodução pelo equipamento de televisão de utilizador 22. Se a programação for armazenada como ficheiros MPEG-2, os circuitos de processamento 33 podem incluir, por exemplo, um descodificador de MPEG-2 para descodificação dos ficheiros e conversão dos mesmos para vídeo do Comité Nacional de normas de televisão (NTSC). A memória 35 pode ser qualquer memória adequada para arquivo temporário e armazenamento de código de programação para executar as funções dos circuitos de processamento 33. A memória 35 pode também ser utilizada para armazenar de forma 32 ΕΡ 1 662 791/ΡΤ temporária programas de vídeo ou partes de programas de vídeo para circuitos de processamento 33 enquanto os programas estão a ser reproduzidos para utilizadores. 0 armazenamento 37 pode ser qualquer armazenamento adequado para gravação de ficheiros de programação e dados de guia de programas associados. 0 armazenamento 37 pode, por exemplo, ser um disco rígido adequado com uma capacidade medida em gigabytes ou mais. Directorias de utilizador, tais como a directoria de utilizador 59 da Fig. 4, podem ser mantidos pelos circuitos de processamento 33 e armazenadas na memória 35, no armazenamento 37 ou em ambos.
Uma arquitectura ilustrativa para controlo à distância 40 é mostrada na Fig. 8. O controlo à distância 40 pode ter quaisquer botões ou teclas adequados para munir um utilizador com uma oportunidade para mudar canais, navegar no guia de programas, acesso a funções de guia de programas, controlo de um dispositivo de armazenamento ou servidor de meios ou quaisquer outras teclas adequadas. De forma mais específica, o utilizador pode premir teclas numéricas 801 para introduzir números de canal, códigos de controlo parental, códigos de compra, etc. O utilizador pode premir a tecla "Guia" 805 para, por exemplo, aceder ao guia de programas e premir as teclas de direcção 803, tecla de subida de página 805 e tecla de descida de página 807 para navegar no guia. O utilizador pode premir a tecla "REPRODUZIR" 809, a tecla "AVANÇO RÁPIDO" 811, a tecla "REBOBINAR" 813, a tecla "GRAVAR" 815, a tecla "STOP" 819 e a tecla "PAUSA" 817 para reproduzir, avançar rápido, rebobinar, gravar, parar e colocar em pausa programas num servidor de meios ou dispositivo de armazenamento.
Uma concretização mais generalizada de equipamento de televisão de utilizador 22 da Fig. 7 é mostrada na Fig. 9. Como mostrado na Fig. 9, dados de guia de programas da instalação de distribuição 16 de guia de programas (Fig. 1) são recebidos pelos circuitos de controlo 42 do equipamento de televisão de utilizador 22. As funções de circuitos de controlo 42 podem ser disponibilizadas através da utilização da arquitectura de equipamento de descodificação de sinal da Fig. 7. Em alternativa, estas funções podem ser integradas num receptor de televisão evoluído (por exemplo, um receptor de televisão digital ou receptor de televisão de alta 33
ΕΡ 1 662 791/PT definição (HDTV)), televisão de computador pessoal (PC/TV) ou qualquer outra arquitectura adequada. Se desejado, pode ser utilizada uma combinação destas arquitecturas. 0 equipamento de televisão de utilizador 22 da Fig. 9 pode ter dispositivo de armazenamento secundário 47, dispositivo de armazenamento digital 49 ou qualquer combinação adequada dos mesmos para gravação de programação. 0 dispositivo de armazenamento secundário 47 e o dispositivo de armazenamento digital 49 podem ser omitidos se desejado. 0 dispositivo de armazenamento secundário 47 pode ser qualquer tipo adequado de dispositivo de armazenamento de programas analógico ou digital (por exemplo, um gravador de videocassete, um disco versátil digital (DVD), etc.) A gravação de programas e outras funcionalidades podem ser controladas pelos circuitos de controlo 42. 0 dispositivo de armazenamento digital 49 pode ser, por exemplo, um dispositivo de armazenamento óptico com possibilidade de escrita (tal como um leitor de DVD capaz de lidar com discos DVD graváveis) , um dispositivo de armazenamento magnético (tal como uma unidade de discos ou fita digital) ou qualquer outro dispositivo de armazenamento digital. A memória 63 pode ser qualquer memória ou outro dispositivo de armazenamento, tal como uma memória de acesso aleatório (RAM), memória apenas de leitura (ROM), memória instantânea, uma unidade de disco rigido, uma combinação de dispositivos deste tipo, etc, que seja adequado para armazenar instruções de aplicação de guia de programas e dados de guia de programas para utilização pelos circuitos de controlo 42. A memória 63 também pode ser utilizada para armazenar momentaneamente vídeos. 0 guia de programas também pode armazenar uma cópia da directoria de utilizador 59 mantida pelo servidor de meios à distância 24 na memória 63. 0 guia de programas pode, por exemplo, receber cópias da directoria de utilizador 59 como parte da sequência de dados de guia de programas. Numa abordagem adequada, a directoria de utilizador 59 pode ser descarregada de forma automática para o guia de programas sempre que for dada entrada na directoria 59, tal como quando o utilizador grava um programa, elimina um programa ou o servidor de meios à distância 24 elimina, de forma automática, um programa devido 34 ΕΡ 1 662 791/ΡΤ ao mesmo ter sido armazenado durante demasiado tempo. Em alternativa, o guia de programas pode obter cópias da directoria de utilizador 59 a partir do servidor de guia de programas 25 ou do servidor de meios à distância 24. Com outra abordagem adequada, o guia de programas pode manter a directoria de utilizador 59 na memória 63. 0 guia de programas pode incluir apontadores para directorias de meios 61 na recuperação de pedidos transmitidos para o servidor de meios à distância 24. 0 equipamento de televisão de utilizador 22 da Fig. 9 pode ter dispositivo de comunicações 51 para permitir comunicações entre o equipamento de televisão de utilizador 22 e o servidor de meios à distância 24 ou o sistema de serviço de Internet 61 através do percurso de comunicações 20. O dispositivo de comunicações 51 também pode permitir comunicações entre o equipamento de televisão de utilizador 22 e o servidor de meios local 29. O dispositivo de comunicações 51 pode ser um modem (por exemplo, qualquer norma digital ou analógica adequada, móvel ou modem de cabo), carta de interface de rede (por exemplo, uma carta Ethernet, carta Token ring, etc.) ou outro dispositivo de comunicações adequado. O utilizador controla a operação do equipamento de televisão de utilizador 22 com o dispositivo de entrada de utilizador 46. O dispositivo de entrada de utilizador 46 pode ser um dispositivo apontador, controlo à distância sem fios, teclado, dispositivo apontador sensível ao toque, sistema de reconhecimento de voz, dispositivo informático do tipo caneta ou qualquer outro dispositivo de entrada de utilizador adequado. Para ver televisão, o utilizador dá instruções aos circuitos de controlo 42 para exibirem um canal de televisão desejado no dispositivo de exibição 45. Para aceder às funções do guia de programas, o utilizador dá instruções ao guia de programas implementado no equipamento de televisão 17 de guia de programas interactivo para gerar um menu principal ou outro ecrã de exibição de guia de programas desejado para exibição no dispositivo de exibição 45.
Quando um utilizador indica um desejo de aceder ao guia de programas de televisão interactivo (por exemplo, através 35
ΕΡ 1 662 791/PT da utilização de uma tecla "MENU" no controlo à distância 40), o guia de programas gera um ecrã de exibição de guia de programas adequado para exibição no dispositivo de exibição 45. Um ecrã de menu principal tal como o ecrã de menu principal 100 ilustrativo da Fig. 10 pode ser gerado de modo a munir o utilizador com acesso a várias funções de guia de programas. Ecrãs de menu principal podem conter vários anúncios, logótipos, etc. O ecrã de menu principal ilustrativo 100 da Fig. 10 inclui um menu 102 de funcionalidades de guia de programas seleccionáveis 106. Se desejado, as funcionalidades seleccionáveis 106 podem ser organizadas de acordo com o tipo de funcionalidade. No menu 102, por exemplo, as opções de guia de programa 106 foram organizadas em três colunas. A coluna com a etiqueta "GUIA DE TV" é para funcionalidades relativas a listagens, a coluna com etiqueta "DEMONSTRAÇÃO MSO" é para funcionalidades relativas ao operador de sistema múltiplo (MSO) e a coluna com etiqueta "ESPECTADOR DE SERVIÇOS" é para funcionalidades relativas ao espectador. O guia de programas de televisão interactivo pode gerar um ecrã de exibição para uma funcionalidade de guia de programas particular quando o utilizador selecciona aquela funcionalidade do menu 102. O ecrã de menu principal 100 pode incluir um ou mais anúncios seleccionáveis 108. Anúncios seleccionáveis 108 podem, por exemplo, incluir texto e gráficos que anunciam programas de visualização paga. Quando o utilizador selecciona um anúncio seleccionável 108, o guia de programas pode exibir informação (por exemplo, informação de visualização paga) ou efectuar outras acções relativas ao conteúdo do anúncio. Podem ser apresentados anúncios em texto simples, se desejado, como ilustrado pela faixa de anúncio seleccionável 110. 0 ecrã de menu principal 100 também pode incluir outros elementos de ecrã. A marca do produto guia de programas pode ser indicada, por exemplo, com a utilização de um logótipo gráfico da marca do produto tal como o logótipo gráfico da marca do produto 112. A identidade do fornecedor de serviço de televisão pode ser apresentada, por exemplo, através da 36 ΕΡ 1 662 791/PT utilização de um logótipo gráfico tal como o logótipo gráfico 114 do fornecedor de serviço. 0 tempo actual pode ser exibido na região de exibição de relógio 116. Além disso, um indicador adequado tal como um indicador gráfico 118 pode ser utilizado para indicar ao utilizador que correio de um operador de cabo está à espera do utilizador se o guia de programas permitir funções de mensagens.
Uma função do guia de programas de televisão interactivo pode ser para munir o utilizador com a oportunidade de ver listagens de programas de televisão. Um utilizador pode indicar uma intenção de ver listagens de programas ao, por exemplo, posicionar a região de realce 120 sobre uma opção de guia de programas desejada relativa a listagens de programas (por exemplo, a opção “filmes"). O guia de programas também pode apresentar listagens de programas quando o utilizador pressiona uma tecla adequada (por exemplo, uma tecla "GUIA") no controlo à distância 40. Quando o utilizador indica uma intenção de ver listagens de programas de televisão, o guia de programas pode obter dados de listagens de programas a partir de uma sequência de dados disponibilizada pela instalação de distribuição 16 de guia de programas, a partir do servidor 25 ou da memória 63 e pode gerar um ecrã de listagens de programas adequado para exibição no monitor 45. Um ecrã de listagens de programas pode conter um ou mais grupos ou listas de listagens de programas organizados de acordo com um ou mais critérios de organização (por exemplo, por categoria de programa). O ecrã de listagens de programas pode estar maximizado ou sobreposto parcialmente sobre um programa que estiver a ser visualizado pelo utilizador. Listagens também podem estar sobrepostas ou colocadas de qualquer outra forma no mesmo ecrã que o programa num modo "pesquisa". O guia de programas pode, por exemplo, munir o utilizador com a oportunidade de ver listagens por tempo, por canal, de acordo com uma quantidade de categorias (por exemplo, filmes, desportos, crianças, etc.) ou pode permitir que o utilizador pesquise uma listagem por título. As listagens de programas podem ser exibidas através da utilização de qualquer lista, tabela, grelha adequadas ou outra arquitectura de exibição adequada. Se desejado, ecrãs de exibição de listagens de programas 37
ΕΡ 1 662 791/PT podem incluir anúncios seleccionáveis, logótipos gráficos de marcas de produtos, gráficos de marcas de fornecedor de serviços, relógios ou qualquer outro indicador ou gráfico adequado.
Um utilizador pode indicar uma intenção de ver listagens de programas por tempo, canal ou categoria ao, por exemplo, seleccionar uma funcionalidade seleccionável do menu 102. Na resposta, o guia de programas pode exibir listagens de programas num ecrã de exibição de listagens adequado. As
Figs. 11a, 11b e 11c ilustram a exibição de listagens de programas por tempo, por canal e por categoria, respectivamente. Os ecrãs de exibição de listagens de programas 130, 135 e 140 das Figs. 11a, 11b e 11c podem incluir a região de realce 151, que realça a listagem de programa 150 actual. O utilizador pode posicionar a região de realce 151 ao introduzir comandos adequados com o dispositivo de entrada de utilizador 46. Por exemplo, se o dispositivo de entrada de utilizador 46 tem um teclado, o utilizador pode posicionar a região de realce 151 com a utilização das teclas de direcção para cima, para baixo, esquerda e direita. As listagens de programas à distância também podem ter aspecto panorâmico à esquerda, direita, para cima e para baixo ao posicionar a região de realce 151 com a utilização das teclas de direcção no controlo à distância 40. Em alternativa, um ecrã sensível ao toque, esfera de tracção, dispositivo de reconhecimento de voz, dispositivo informático do tipo caneta ou outro dispositivo adequado pode ser utilizado para deslocar a região de realce 151 ou as listagens de programas seleccionadas sem a utilização da região de realce 151. Ainda noutra abordagem, o utilizador pode pronunciar uma listagem de programas de televisão para um sistema de reconhecimento de pedidos por voz. Estes métodos de selecção de listagens de programas são meramente ilustrativos. Qualquer outra abordagem adequada para selecção de listagens de programas ou outros temas no guia de programas pode ser utilizada se desejado. O guia de programas pode munir o utilizador com uma oportunidade de ver listagens de programas para outras horas ou canais. O utilizador pode indicar uma intenção de aceder a listagens para outras horas ou canais ao, por exemplo, 38
ΕΡ 1 662 791/PT utilizar as teclas de direcção esquerda e direita para alterar os intervalos de tempo (quando listagens de programas são apresentadas por tempo como mostrado na Fig. 11a) ou para alterar canais (quando listagens de programas são apresentadas por canal como mostrado na Fig. 11b). Em resposta a uma indicação deste tipo, o guia de programas pode, por exemplo, fazer rolar ou folhear as listagens de programas para exibir listagens de programas suplementares.
Os ecrãs de listagens de programas das Figs. 11a, 11b e 11c também podem incluir listagens para programas gravados pelo, ou seleccionados para gravação pelo, servidor de meios à distância 24 ou pelo servidor de meios local 29. Programas gravados podem ser exibidos, por exemplo, no inicio das listagens. Programas para gravar podem ser exibidos na sua posição normal numa lista e podem, se desejado, ter um ícone que indica que os mesmos foram gravados. A Fig. 11a mostra, por exemplo, uma listagem para uma gravação agendada de "I Love Lucy" às 22:30 de 5 de Junho de 1999. A listagem tem um ícone 299 que indica que a listagem é para um programa que se destina a ser gravado. A Fig. 11b mostra, por exemplo, uma listagem de programas de comédia para uma cópia gravada da comédia "Saturday Night Live" que foi gravada às 11:00 de 1 de Junho de 1999. A Fig. 11c mostra, por exemplo, uma listagem de filmes para uma cópia gravada do filme "Perfect Body", gravado às 21:00 de 31 de Maio de 1999.
As Figs. 11a, 11b e 11c mostram listagens para programas gravados e programas agendados para gravação que têm um formato de exibição de listagens ligeiramente diferente do que as listagens para programas normais. Por exemplo, programas gravados têm as suas datas de gravação reais ou antecipadas exibidas. Se desejado, qualquer outra abordagem adequada pode ser utilizada para indicar que algumas listagens são para programas gravados ou programas agendados para gravação. Estas listagens podem ter uma cor diferente, uma fonte diferente, um sombreado, um ícone ou qualquer outro efeito que indique que as mesmas não são listagens de programas normais. Em alternativa, estas listagens podem ser omitidas dos ecrãs de listagens de programas. 39 ΕΡ 1 662 791/ΡΤ Ο guia de programas pode também munir um utilizador com uma oportunidade para ver listagens de programas de visualização paga. Um utilizador pode, por exemplo, indicar uma intenção de ver listagens de programas de visualização paga ao seleccionar a funcionalidade no ecrã de "Tempo de visualização paga" do menu principal 102 da Fig. 10. Em resposta, o guia de programas pode exibir listagens de programas de visualização paga por tempo, como está ilustrado pelas listagens de visualização paga pelos ecrãs de tempo 203 da Fig. 12a. Como com outros ecrãs de listagens, um utilizador pode rolar para cima e para baixo para ver listagens de programas de visualização paga para canais adicionais. Um utilizador pode ver listagens de programas para intervalos de tempo adicionais ao utilizar a tecla de direcção para a direita. Um utilizador também pode, por exemplo, seleccionar anúncios seleccionáveis ao utilizar a tecla de direcção para a esquerda. O guia de programas também pode munir um utilizador com uma oportunidade de ver listagens de programas de visualização paga por titulo. Um utilizador pode indicar uma intenção de ver listagens de programas de visualização paga por titulo ao, por exemplo, seleccionar uma funcionalidade seleccionável "Titulo de visualização paga" do menu principal 102 da Fig. 10. Em resposta, o guia de programas pode exibir listagens de programas de visualização paga por titulo como mostrado, por exemplo, nas listagens de programas de visualização paga pelo ecrã de títulos 211 da Fig. 12b. O guia de programas pode munir um utilizador com uma oportunidade de realçar um anúncio seleccionável ao, por exemplo, utilizar a tecla de direcção para a esquerda.
O guia de programas interactivo pode permitir que o utilizador veja listagens de programas enquanto assiste a programação de televisão ao, por exemplo, sobrepor uma região de exibição "FOLHEAR" ou "PESQUISAR" sobre um programa de televisão. A Fig. 13a mostra um ecrã FOLHEAR 200 ilustrativo que o guia de programas pode exibir sempre que o utilizador muda canais de televisão. A exibição FOLHEAR pode conter informação associada com o programa actual, tal como o título de programa 210, o tempo de execução 215, o número de canal actual 216 e as letras de chamada 225 do canal actual. A 40
ΕΡ 1 662 791/PT exibição FOLHEAR pode também incluir uma quantidade de gráficos, tais como o logótipo de marca 230, um gráfico de patrocínio, um gráfico de logótipo de canal, indicador de correio, anúncios seleccionáveis ou qualquer outro gráfico adequado. A classificação dos programas também pode ser exibida. Se desejado, o logótipo de marca 230 pode ser substituído ou utilizado em conjunto com um ícone de informação seleccionável. O utilizador pode, por exemplo, pressionar uma tecla "INFO" no controlo à distância 40 para obter informação de programa adicional para o programa em exibição na exibição FOLHEAR 200. A exibição FOLHEAR 200 também pode incluir indicador de classificação 227 para indicação da classificação do programa actual. Se o guia de programas disponibilizar uma funcionalidade de controlo parental, a classificação do programa em cada novo canal que o utilizador sintoniza pode ser examinada pelo guia de programas para determinar se o programa satisfaz as definições de controlo parental que foram estabelecidas previamente pelo utilizador. Se a classificação de programa não for aceitável, o guia de programas pode, por exemplo, exibir apenas a faixa FOLHEAR sem o vídeo de programa e solicitar um código de controlo parental. A Fig. 13b mostra uma sobreposição ou exibição "PESQUISAR" ilustrativa que o guia de programas pode exibir quando o utilizador indica uma intenção de pesquisar através de listagens de programas para um dado intervalo de tempo (por exemplo, por meio de uma tecla "pesquisar" no controlo à distância 40). O utilizador pode pesquisar através de listagens de programas ao, por exemplo, utilizar teclas de direcção do controlo à distância. Distinta da exibição de FOLHEAR, a exibição PESQUISAR permite que o utilizador continue a assistir a um programa num canal particular (por exemplo, o canal 178) enquanto pesquisa informação sobre programas que estão a ser reproduzidos noutros canais ou noutros instantes.
As sobreposições FOLHEAR e PESQUISAR das Figs. 13a e 13b são mostradas incluindo um logótipo de marca exibido na esquerda da sobreposição. O logótipo também pode, por 41 ΕΡ 1 662 791/PT exemplo, promover diferentes patrocinadores à medida que o utilizador pesquisa listagens de programas ou folheia entre canais. Os logótipos podem mudar dentro da mesma sobreposição ou faixa se o utilizador exibir a sobreposição ou faixa durante um tempo predefinido. 0 logótipo pode, por exemplo, rodar de forma automática através de uma lista de anúncios de logótipos, voltando ao primeiro anúncio depois de cada anúncio na lista ter sido exibido. 0 logótipo de marca também pode ser substituído por um anúncio de texto.
Além de munir o utilizador com a oportunidade de aceder a programação de televisão e dados de guia de programas nestas e noutras formas, o guia de programas pode munir o utilizador com uma oportunidade para gravar programas a pedido no servidor de meios à distância 24 ou no servidor de meios local 29, para ver listagens ou directorias dos programas que foram gravados ou seleccionados para gravação e reproduzir vídeos e dados de guia de programas associados a pedido do servidor de meios à distância 24 ou do servidor de meios local 29. 0 guia de programas também pode munir um utilizador com uma oportunidade para gravar séries de programas ou outros grupos de programas (por exemplo, pacotes de visualização paga). Os utilizadores podem indicar uma intenção de gravar um programa ou grupo de programas a pedido ao, por exemplo, premir uma tecla “GRAVAR" no controlo à distância 40 enquanto assistem a um programa ou depois de realçarem a sua listagem.
As Figs. 14a e 14b mostram sobreposições ilustrativas 1331 que podem ser exibidas pelo guia de programas quando um utilizador indica uma intenção de gravar um programa no servidor de meios à distância 24 ou no servidor de meios local 29. A sobreposição 1331 pode ser exibida quando, por exemplo, um utilizador indica uma intenção de gravar o programa que o utilizador está a assistir, como mostrado na Fig. 14a. Em alternativa, a sobreposição 1331 pode ser sobreposta sobre um ecrã de exibição de listagens de programas quando, por exemplo, um utilizador realça uma listagem e indica uma intenção de gravar o programa listado (por exemplo, ao premir uma tecla "GRAVAR" no controlo à distância 40), como mostrado na Fig. 14b. A sobreposição 1331 pode solicitar que o utilizador confirme o pedido de gravação 42 ΕΡ 1 662 791/PT ao, por exemplo, seleccionar "Sim". Estes modos de munir um utilizador com a oportunidade de gravar um programa são apenas ilustrativos e pode ser utilizado qualquer outra abordagem adequada.
As Figs. 14c e 14d mostram sobreposições ilustrativas adicionais de 1339 que podem, por exemplo, substituir as sobreposições 1331 das Figs. 14a e 14b. Em alternativa, o guia de programas pode exibir a sobreposição 1339 quando o utilizador selecciona "Sim" a partir da sobreposição 1331 das Figs. 13a e 13b. A sobreposição 1339 indica ao utilizador o custo de gravação do programa seleccionado no servidor de meios à distância 24. A sobreposição 1339 também mune o utilizador com uma oportunidade de confirmar ou cancelar o registo. 0 custo exibido na sobreposição 1339 pode ser baseado em qualquer esquema de facturação de utilizador adequado. Os utilizadores podem ser taxados, por exemplo, numa base por registo, com base na duração do programa ou podem ser taxados com uma tarifa de assinante plana para gravação ilimitada num período (por exemplo, um por mês) . 0 equipamento de distribuição 16 de guia de programas pode disponibilizar o custo e outros dados de guia de programas adequados (por exemplo, o título, tempo de emissão, etc.) para o sistema de facturação 199. 0 sistema de facturação 199 pode gerar uma factura que é enviada para o utilizador ou pode debitar, de forma automática, a conta do utilizador. A Fig. 14e mostra uma sobreposição 1339 ilustrativa que o guia de programas pode exibir quando, por exemplo, um utilizador selecciona um programa que é parte de um grupo de programas. A sobreposição 1447 pode indicar ao utilizador que um programa é parte de um grupo de programas, neste exemplo uma série, e solicitar que o utilizador confirme se o utilizador deseja gravar todos os programas no grupo. Se o utilizador selecciona "Sim", o servidor de meios à distância 24 ou o servidor de meios local 29 pode gravar todos os programas no grupo. Se o utilizador selecciona "Não", o guia de programas pode exibir a sobreposição 1331 das Figs. 14a, 14b, 14c ou 14d para solicitar que o utilizador confirme a gravação apenas do que está a ser exibido. 43
ΕΡ 1 662 791/PT Ο guia de programas pode munir o utilizador com uma oportunidade para gravar programas e pacotes de visualização paga. Uma sobreposição 370 para encomenda de visualização paga ilustrativa é mostrada na Fig. 15a. O guia de programas pode exibir a sobreposição 370 para encomenda de visualização paga quando, por exemplo, o utilizador realça uma listagem de programas de visualização paga e prime uma tecla "encomenda" ou outra adequada no controlo à distância 40. A sobreposição 370 para encomenda de visualização paga pode exibir informação para encomenda 374 e pode solicitar que o utilizador encomende o programa de visualização paga seleccionado ao introduzir um código de compra. O utilizador pode introduzir um código de compra através da utilização, por exemplo, de teclas numéricas no controlo à distância 40 ou pode cancelar a compra e voltar ao último ecrã ao seleccionar a funcionalidade "CANCELAR" 376. O guia de programas pode também munir o utilizador com a oportunidade de confirmar a encomenda de visualização paga através da utilização da sobreposição 380 de confirmação de encomenda ilustrativa da Fig. 15b. Se desejado, o guia de programas pode exibir a sobreposição 380 de confirmação de encomenda da Fig. 15b em vez da sobreposição 370 para encomenda de visualização paga para munir o utilizador com a oportunidade de encomendar um programa de visualização paga sem solicitar que o utilizador introduza um código de compra. O custo exibido nas sobreposições 370 e 380 pode ser definido com a utilização de qualquer abordagem adequada. O custo pode, por exemplo, ser o mesmo se um utilizador vê uma visualização paga ou se grava a mesma. Em alternativa, o utilizador pode ser taxado com uma tarifa diferente quando só grava um programa de visualização paga. Noutra abordagem adequada, tarifas para programas de visualização paga podem diferir em função do comprimento do programa. Ainda noutra abordagem adequada, o utilizador pode pagar uma tarifa plana para gravar qualquer quantidade de visualizações pagas num período predeterminado (por exemplo, um mês) . O custo pode ser disponibilizado pelo equipamento de distribuição 16 de guia de programas para o sistema de facturação 199 para facturar o utilizador ou de qualquer outra forma ajustar a conta do utilizador. 44
ΕΡ 1 662 791/PT
Quando um utilizador indica uma intenção de gravar um pacote de visualização paga ao, por exemplo, seleccionar uma listagem de pacotes nos ecrãs de listagens 203 ou 211 de programas de visualização paga das Figs. 12a e 12b, o guia de programas pode exibir um ecrã de encomenda de pacote, tal como o ecrã de encomenda de pacote 811 da Fig. 17. O ecrã de encomenda de pacote 811 pode solicitar a um utilizador um código de compra. Depois de um utilizador introduzir um código de compra correcto, o guia de programas encomenda o pacote de visualização paga a partir da instalação de distribuição 16 de guia de programas ou de outra instalação de distribuição adequada. O custo do pacote conforme exibido na Fig. 17 pode ser definido através da utilização de qualquer abordagem adequada. O custo pode, por exemplo, ser o mesmo se um utilizador assiste a cada programa de visualização paga no pacote ou se o utilizador grava cada programa. Em alternativa, o utilizador pode ser taxado com uma tarifa diferente quando grava um ou mais programas de visualização paga num pacote enquanto assiste aos mesmos. Noutra abordagem, custos para programas de visualização paga podem diferir em função do comprimento de cada programa no pacote. Ainda noutra abordagem, o utilizador pode pagar uma tarifa plana para gravar qualquer quantidade de visualizações pagas num período predeterminado (por exemplo, um mês) . O custo pode ser disponibilizado pelo equipamento de distribuição 16 de guia de programas para o sistema de facturação 199 para facturar o utilizador ou de qualquer outra forma ajustar a conta do utilizador.
Quando um utilizador indica uma intenção de gravar um programa ou grupo de programas no servidor de meios à distância 24 ou no servidor de meios local 29 (e possivelmente uma intenção de confirmar a gravaçao do programa), o guia de programas gera um pedido de gravação que é transmitido para o servidor de meios à distância adequado pelo dispositivo de comunicações 51 (Fig. 9) através do percurso de comunicações 20 ou 31. O pedido de gravação pode incluir, por exemplo, um identificador para o programa que o utilizador deseja gravar, um identificador para o utilizador, 45 ΕΡ 1 662 791/PT e, se desejado, qualquer outra informação relativa ao programa e ao utilizador. Se o utilizador indicou uma intenção de gravar um grupo de programas, o pedido pode incluir um identificador de grupo ou os identificadores de programa dos programas constituintes.
No instante em que um programa ou programa num grupo seleccionado é emitido (cujo instante pode ser aquele em que o programa está seleccionado para gravação), o servidor de meios à distância 24 ou o servidor de meios local 29 pode gravar o programa e quaisquer dados de guia de programas associados. Os dados de guia de programas podem ser armazenados como ficheiros associados com o programa através da utilização de apontadores. Uma vez gravado o programa seleccionado, o servidor de meios à distância 24 ou o servidor de meios local 29 podem disponibilizar uma cópia de directoria de utilizador 59 para o guia de programas se o guia de programas mantém uma cópia de directorias de utilizador. Em alternativa, o servidor de meios à distância 24 ou o servidor de meios local 29 pode disponibilizar um apontador para a localização do programa no armazenamento de meios 63. Ainda noutra abordagem adequada, as directorias de utilizador 59 podem ser mantidas apenas pelo servidor de meios à distância 24 ou pelo servidor de meios local 29 e disponibilizadas para o guia de programas a pedido.
Na prática, alguns programas podem ser de cópia protegida. A instalação principal 12, a instalação de distribuição 16 de guia de programas ou outra instalação de distribuição podem, por exemplo, designar alguns programas como não graváveis. Quando o utilizador indica uma intenção de gravar um programa de cópia protegida, o guia de programas pode indicar ao utilizador que o programa não pode ser gravado como mostrado na Fig. 16. 0 guia de programas pode munir o utilizador com a oportunidade de aceder a uma directoria ou outra lista de programas deste tipo que foram gravados para o utilizador no servidor de meios à distância 24 ou no servidor de meios local 29. 0 utilizador pode indicar uma intenção de aceder a uma directoria ou lista de programas gravados ao, por exemplo, premir uma tecla "DIR" no controlo à distância 40 ou 46 ΕΡ 1 662 791/PT seleccionar uma funcionalidade "Directoria" no menu principal 107. As Figs. 18a e 18b mostram sobreposições 320 ilustrativas que podem ser exibidas pelo guia de programas quando o utilizador indica uma intenção de visualizar uma directoria dos programas que o utilizador gravou no servidor de meios à distância 24 ou no servidor de meios local 29. A Fig. 18a mostra a sobreposição 320 sobreposta no topo do video do canal a que o espectador está a assistir. A Fig. 18b mostra a sobreposição 32 sobreposta no topo de um ecrã de listagens de programa. A sobreposição 320 pode exibir qualquer informação relativa à programação que o utilizador seleccionou para gravação pelo servidor de meios à distância 24 ou pelo servidor de meios local 29. A sobreposição 320 pode exibir, por exemplo, os canais e os títulos dos programas gravados, as datas e as horas em que os mesmos foram gravados ou qualquer outra informação adequada.
Listagens de programas para programas gravados podem ser organizadas por canal, tema, utilizador ou por quaisquer outros critérios adequados. Na prática, listagens de programas para programas gravados podem ser exibidas em sobreposições com base no tipo de ecrã exibido sobre o qual as sobreposições são exibidas. Na Fig. 18b, por exemplo, são exibidas listagens por tempo devido ao ecrã de exibição sobre o qual as mesmas são exibidas exibir listagens de programas por tempo. A Fig. 18c mostra listagens de programas gravados na categoria de filmes, devido ao ecrã de exibição sobre o qual as mesmas são exibidas apenas exibir listagens para filmes. As Figs. 18b e 18c são ilustrativas e quaisquer critérios adequados podem ser utilizados. Além disso, listagens de programas podem ser exibidas através da utilização de critérios de exibição ou com base nos temas quando as listagens de programas são sobrepostas no topo de um vídeo a que o utilizador está a assistir. A Fig. 18d mostra um ecrã de directorias 350 ilustrativo que pode ser exibido pelo guia de programas quando o utilizador indica uma intenção de ver uma directoria dos programas que o utilizador gravou no servidor de meios à distância 24 ou no servidor de meios local 29. O ecrã de directorias 350 pode exibir informação relativa ao programa como a que é exibida pela sobreposição 320. O ecrã de 47 ΕΡ 1 662 791/ΡΤ directorias 350 também pode incluir outros elementos de ecrã de exibição de guia de programas, tais como anúncios seleccionáveis, logótipos de fornecedores de serviços, logótipos de marcas, faixas de anúncios, etc. Se desejado, o ecrã de directorias 350 pode ser exibido como uma sobreposição e qualquer das sobreposições descritas aqui pode ser apresentada como ecrã de exibição. Ecrãs de exibição deste tipo podem ser ecrãs de exibição em ecrã maximizado ou ecrãs de exibição em ecrã parcial. Ecrãs de exibição em ecrã parcial podem conter uma janela de vídeo de tamanho reduzido (por exemplo, para exibição do canal de televisão actual).
Noutra abordagem adequada, o guia de programas pode exibir um menu de directorias quando o utilizador, por exemplo, prime uma tecla "DIR" no controlo à distância 40 ou selecciona uma funcionalidade de "Directoria" do menu principal 102. Um ecrã de menu de directorias 370 ilustrativo é mostrado na Fig. 18e. O ecrã de menu de directorias 370 pode munir o utilizador com uma oportunidade de ver directorias de programas gravados, tais como a mostrada na Fig. 18d, mas organizadas de várias formas. Quando, por exemplo, o utilizador selecciona a funcionalidade "Por tempo" 371, o guia de programas pode exibir uma directoria de programas gravados ordenada de acordo com a data e a hora em que os programas foram gravados. Quando, por exemplo, o utilizador selecciona a funcionalidade "Filmes" 373, a funcionalidade "Desporto" 375, a funcionalidade "Crianças" 377 ou a funcionalidade "Adultos" 379, o guia de programas pode exibir uma directoria de programas gravados para filmes, desportos, programas infantis ou programas para adultos, respectivamente. As categorias listadas podem ser predeterminadas ou baseadas em filmes que um utilizador gravou. Por exemplo, se um utilizador apenas gravou filmes, apenas a funcionalidade "Filmes" 373 pode ser exibida. Se um utilizador gravou filmes e programas infantis, a funcionalidade "Filmes" 373 e a funcionalidade "Crianças" 377 podem ser exibidas. O guia de programas também pode munir o utilizador com uma oportunidade de ver uma directoria de programas que o utilizador seleccionou para gravação por um servidor de meios mas que não foram ainda gravados. A Fig. 18f mostra um ecrã 48 ΕΡ 1 662 791/PT 390 de directorias de programas pendentes, ilustrativo que o guia de programas pode exibir quando, por exemplo, o utilizador selecciona a funcionalidade "Selecções pendentes" 381 do ecrã de menu de directorias 370. A informação exibida nos ecrãs de listagens das Figs. 11a, 11b, 11c, 12a e 12b (Figs. 18a e 18b), na sobreposição 320 ou nos ecrãs de directoria 350 ou 390 (Figs. 18d e 18f), podem ser obtidas pelo guia de programas através da utilização de qualquer abordagem adequada. Por exemplo, uma cópia de directorias de utilizador 59 que tem toda a informação exibida pode ser armazenada pelo guia de programas na memória 49. Ainda noutra abordagem adequada, uma cópia de directoria de utilizador 59 pode ser mantida pelo guia de programas que inclui todos os dados de guia de programas relativos ao programa gravado (por exemplo, informação de listagens de programas, ligações de Internet, suporte lógico, etc.), enquanto uma cópia de directoria de utilizador 59 que tem um subconjunto pequeno do total dos dados de guia de programas disponíveis para o programa (por exemplo, um identificador e apontador de programa) é mantida pelo servidor de meios à distância 24 ou pelo servidor de meios local 29. Ainda noutra abordagem adequada, o guia de programas pode manter a directoria de utilizador 59 incluindo os dados de guia de programa para os programas na directoria. Em alternativa, uma directoria mais pequena pode ser mantida com apenas identificadores de programa, por exemplo, e o guia de programas pode obter dados de guia de programa a partir de uma sequência de dados de guia de programa disponibilizada de forma contínua a partir da instalação de distribuição 16 de guia de programas ou do servidor de guia de programas 25 com base no identificador. Ainda noutra abordagem adequada, a directoria de utilizador 59 pode ser mantida totalmente pelo servidor de meios à distância 24 ou pelo servidor de meios local 29 e tornada disponível para o guia de programas a pedido. Estas várias abordagens são apenas ilustrativas e qualquer abordagem adequada para manter directorias de utilizador e munir utilizadores com acesso às mesmas pode ser utilizada se desejado.
Logo que o utilizador tenha seleccionado para reprodução um programa gravado no servidor de meios à distância 24, o 49 ΕΡ 1 662 791/PT guia de programas pode indicar ao utilizador um custo para reprodução do programa e solicitar que o utilizador confirme a reprodução. A Fig. 19 mostra uma sobreposição ilustrativa 1901 em que um custo deste tipo está indicado e em que o utilizador é solicitado a confirmar a reprodução. O custo exibido na sobreposição 1901 pode ser determinado através da utilização de qualquer abordagem adequada. Os utilizadores podem ser taxados com uma tarifa plana por reprodução. Em alternativa, os utilizadores podem ser taxados com base na duração de um programa seleccionado. Noutra abordagem adequada, os utilizadores podem subscrever um serviço em que é permitido aos utilizadores um tempo de reprodução ilimitado para uma tarifa plana paga numa base periódica (por exemplo, mensalmente). Ainda noutra abordagem adequada, os utilizadores podem ser taxados com uma tarifa plana durante uma quantidade predeterminada de reproduções de programas. O custo pode ser disponibilizado pelo equipamento de distribuição 16 de guias de programas para o sistema de facturação 199 para facturar o utilizador ou por outra forma ajustar a conta do utilizador.
Logo que o utilizador tenha seleccionado uma listagem e indicado uma intenção de que o seu programa associado seja reproduzido (e se necessário confirmada a reprodução), o guia de programas pode emitir um pedido de reprodução para o servidor de meios à distância 24 ou para o servidor de meios local 29. Se desejado, o programa pode ser reproduzido sem anúncios. O guia de programas pode, por exemplo, munir o utilizador com a oportunidade de definir uma opção "saltar anúncios" a partir do ecrã de configuração. Em alternativa, o utilizador pode avançar rápido através dos anúncios.
Se desejado, o guia de programas pode, pelo contrário, emitir um pedido de recuperação para o servidor de meios à distância 24. Em contraste com um pedido de reprodução que orienta o servidor de meios à distância 24 tanto para a recuperação como para a reprodução do programa solicitado, um pedido de recuperação não necessita de envolver reprodução imediata. Em vez disso, o programa seleccionado pode ser recuperado do armazenamento 15 e disponibilizado ao equipamento de televisão de utilizador 22. Como utilizado aqui, "pedido de recuperação" significa qualquer comando, 50
ΕΡ 1 662 791/PT pedido, mensagem, chamada de procedimento à distância, comunicação baseada em objecto ou qualquer outro tipo de comunicação baseado em inter-processo ou inter-objecto pelo qual o guia de programas possa comunicar informação para o servidor de meios à distância 24 ou para o servidor de meios local 29 especificando que programa o utilizador deseja recuperar. O programa recuperado pode então ser armazenado na memória 44 (Fig. 6), no dispositivo de armazenamento digital 31 (Fig. 6), no dispositivo de armazenamento secundário 32 (Fig. 6) ou no servidor de meios local 29 (Fig. 6). Quando o utilizador desejar ver o programa que foi recuperado e armazenado localmente, o equipamento de televisão de utilizador 20 pode ser orientado para reproduzir o programa. Se o programa recuperado estiver armazenado no servidor de meios local 29, o equipamento de televisão de utilizador pode recuperar o mesmo e depois reproduzir o mesmo ou pode pedir que o servidor de meios local 29 reproduza o mesmo directamente. O guia de programas pode munir os utilizadores com a oportunidade de verem informação adicional para programas gravados pelo servidor de meios à distância 24 ou pelo servidor de meios local 29. A Fig. 20 mostra um ecrã de informação 161 maximizado, ilustrativo, que pode ser exibido quando um utilizador indica uma intenção de ver informação para um programa que foi gravado pelo servidor de meios à distância 24 ou pelo servidor de meios local 29. O ecrã de informação 161 maximizado pode ser exibido, por exemplo, quando o utilizador prime uma tecla "INFO" no controlo à distância 40 depois de realçar uma listagem de programas numa directoria ou outra lista de programas gravados. O ecrã de informação 161 maximizado pode incluir janela de informação 162, na qual pode ser exibida uma breve descrição do programa gravado. A informação exibida na janela de informação 162 pode ter sido armazenada pelo servidor de meios à distância 24 ou pelo servidor de meios local 29 quando o programa foi gravado, pode ter sido armazenada pelo guia de programas quando o programa foi gravado, pode ser recuperada pelo guia de programas quando o ecrã de informação 161 maximizado é exibido ou pode ser obtida pelo guia de 51 ΕΡ 1 662 791/PT programas através da utilização de qualquer abordagem adequada. 0 guia de programas pode munir os utilizadores com a oportunidade de reproduzirem programas a pedido daqueles utilizadores que tenham gravado previamente no servidor de meios à distância 24 ou no servidor de meios local 29. 0 servidor de meios à distância 24 ou o servidor de meios local 29 podem reproduzir programas a pedido em resposta a pedidos de reprodução gerados pelo guia de programas. Como utilizado aqui, "pedido de reprodução" significa qualquer comando, pedido, mensagem, chamada de procedimento à distância, comunicação baseada em objecto ou qualquer outro tipo de comunicação baseada em inter-processo ou inter-objecto de modo que o guia de programas possa comunicar informação para o servidor de meios a especificar que programa o utilizador deseja reproduzir. 0 guia de programas pode gerar pedidos de reprodução quando um utilizador indica uma intenção de ver um programa que tenha sido gravado. 0 utilizador pode indicar uma intenção de ver um programa que tenha sido gravado ao, por exemplo, realçar uma listagem numa directoria ou lista e premir uma tecla "REPRODUZIR" no controlo à distância 40.
Quando o utilizador indica uma intenção de ver um programa que tenha sido gravado, o guia de programas gera um pedido de reprodução que é transmitido pelo dispositivo de comunicações 51 para o servidor de meios à distância 24 ou para o servidor de meios local 29 através dos percursos de comunicações 20 ou 31. O pedido de reprodução pode incluir, por exemplo, um identificador para o programa que o utilizador deseja reproduzir, um identificador para o utilizador, etc. O pedido de reprodução pode incluir um apontador para uma directoria de meios no armazenamento 15 se, por exemplo, o guia de programas mantiver uma directoria de utilizador 59 ou uma cópia de uma directoria de utilizador 59. O servidor de meios à distância 24 recupera o programa solicitado do armazenamento 15 e disponibiliza o mesmo para o equipamento de distribuição 21 para distribuição como um sinal de video adequado (por exemplo, video NTSC, MPEG-2, etc.). O servidor de meios local 29 pode recuperar o programa solicitado do armazenamento 37 e disponibilizar o mesmo para o equipamento de televisão de utilizador 22 como um sinal de 52 ΕΡ 1 662 791/ΡΤ vídeo adequado (por exemplo, vídeo NTSC, MPEG-2, etc.). Se o programa solicitado se destinar a ser reproduzido, o equipamento de distribuição 21 distribui o programa em tempo real. Se o programa solicitado se destina meramente a ser recuperado, o equipamento de distribuição 21 pode transferir o programa para o equipamento de televisão 21 num formato comprimido (por exemplo, como um ficheiro de vídeo comprimido). 0 servidor de meios à distância 24 também pode recuperar quaisquer dados de guia de programas gravados associados com um programa gravado e pode disponibilizar os dados recuperados para o equipamento de distribuição 21 ou para o servidor de guia de programas 25 para acesso pelo guia de programas. Em alternativa, o servidor de meios à distância 24 pode disponibilizar os dados recuperados directamente para o guia de programas. 0 servidor de meios local 29 pode disponibilizar os dados para o equipamento de televisão de utilizador 22 através do percurso de comunicações 29. 0 guia de programas pode aceder aos dados de guia de programas recuperados e pode apresentar os mesmos ao utilizador para que o utilizador possa interagir com os dados durante a reprodução exactamente como quando o programa foi originalmente emitido. Se, por exemplo, os dados de programa associados forem suporte lógico informático a que o utilizador poderia ter acedido quando o programa foi originalmente emitido, o suporte lógico pode ser descarregado pelo guia de programas em resposta a uma indicação do utilizador de que o utilizador tem intenção de aceder ao suporte lógico. 0 suporte lógico pode ser armazenado, por exemplo, no dispositivo de armazenamento digital 49, de modo que o utilizador possa aceder ao suporte lógico durante a reprodução. Este suporte lógico pode ser, por exemplo, uma aplicação de televisão interactiva, tal como uma aplicação de compras que permite que o utilizador coloque encomendas para bens apresentados durante o programa.
Outro exemplo de dados de guia de programas que podem ser armazenados é uma ligação de Internet que está associada com um programa gravado. A ligação pode ser recuperada pelo 53 ΕΡ 1 662 791/PT servidor de meios à distância 24 ou pelo servidor de meios local 29 e descarregada pelo guia de programas quando o utilizador reproduz o programa. 0 guia de programas pode exibir a ligação num ecrã de exibição de guia de programas ou sobreposição. As ligações de Internet podem, por exemplo, ser exibidas numa sobreposição que é exibida no topo do programa durante a reprodução. 0 guia de programas pode munir o utilizador com a oportunidade de seleccionar a ligação de Internet e, deste modo, orientar o guia de programas para lançar um motor de pesquisa Web. 0 guia de programas pode munir um utilizador com uma oportunidade para controlar programas e dados de guia de programas de forma parental. 0 guia de programas pode, por exemplo, munir um utilizador com uma oportunidade de configurar um código de controlo parental e critérios de controlo parental (por exemplo, classificação, título, canal, etc.). Quando um utilizador indica uma intenção de gravar um programa ou reproduzir um programa a partir do servidor de meios à distância 24 ou do servidor de meios local 29, o guia de programas pode comparar as características do programa (por exemplo, a sua classificação, título, canal, etc.) armazenadas, por exemplo, numa directoria de utilizador, com os critérios de controlo parental. Se o programa não satisfizer os critérios (por exemplo, a sua classificação é demasiado adulta), o guia de programas pode solicitar ao utilizador o código de controlo parental. 0 guia de programas também pode permitir que o utilizador grave ou reproduza o programa apenas quando o código de controlo parental adequado for introduzido. A Fig. 21 mostra uma sobreposição 2111 ilustrativa que o guia de programas pode exibir sobre um canal de televisão ou ecrã de exibição de guia de programas para solicitar ao utilizador o código de controlo parental. A Fig. 21 mostra a sobreposição 2111 exibida sobre um canal de televisão que teve uma desagradável interrupção de programa pelo guia de programas. 0 guia de programas pode munir o utilizador com controlo do tipo VCR de programas gravados. 0 controlo à distância 40 pode ter teclas semelhantes aos botões de um típico gravador de videocassetes analógico. Noutra abordagem adequada, o dispositivo de entrada de utilizador 46 (Fig. 9) pode ter um 54 ΕΡ 1 662 791/ΡΤ teclado com teclas correspondentes às funções do tipo VCR. Em alternativa, o utilizador pode seleccionar funcionalidades no ecrã que correspondam a estas funções. Qualquer outra abordagem adequada para munir o utilizador com controlo do tipo VCR de programas gravados pode ser utilizada. 0 utilizador pode, por exemplo, colocar em pausa, parar, rebobinar, avançar rápido ou reproduzir o programa ao indicar uma intenção de assim fazer (por exemplo, ao premir as teclas adequadas no controlo à distância 40).
Estas funcionalidades podem ser realizadas localmente pelo guia de programas, por exemplo, ao descarregar a pedido programação em parte, ou no todo, para o dispositivo de armazenamento digital 49 (Fig. 9). Em alternativa, o guia de programas pode gerar pedidos adequados (por exemplo, pedidos para avançar rápido, rebobinar, saltar e colocar em pausa) em resposta em tempo real à entrada do utilizador. Estes requisitos podem ser transmitidos para o servidor de meios à distância 24 ou para o servidor de meios local 29 para processamento. Como utilizado aqui, pedidos para controlo do tipo VCR de programas gravados significam qualquer comando, pedido, mensagem, chamada de processo à distância, comunicação baseada em objecto ou qualquer outro tipo de comunicação baseada em inter-processos ou inter-objectos em que o guia de programas pode comunicar informação para o servidor de meios a especificar que programa o utilizador deseja controlar. A Fig. 22 mostra uma sobreposição 2201 ilustrativa para munir utilizadores com controlo do tipo VCR de programas que foram gravados no servidor de meios à distância 24 ou no servidor de meios local 29. Quando um utilizador indica uma intenção de parar, reproduzir, avançar rápido, rebobinar ou colocar em pausa um video ao, por exemplo, premir as teclas adequadas no controlo à distância 40, o guia de programas pode indicar que tecla foi premida. Por exemplo, se o utilizador avança rápido num vídeo, o guia de programas pode realçar a parte do botão "AVANÇAR RÁPIDO" da sobreposição 2201. O guia de programas também pode munir os utilizadores com uma oportunidade de armazenarem de forma temporária 55 ΕΡ 1 662 791/ΡΤ programas em tempo real. Esta funcionalidade pode permitir que utilizadores vejam partes de um programa que o utilizador, de outro modo, não teria possibilidade de ver quando, por exemplo, o utilizador sai momentaneamente do quarto em que o programa está a ser exibido. Um utilizador pode indicar uma intenção de gravar um programa no servidor de meios à distância 24 quando a visualização foi interrompida, por exemplo, ao premir uma tecla "PAUSA" no controlo à distância 40. O guia de programas pode responder por exemplo ao indicar ao utilizador um custo para armazenar de forma temporária o programa e solicitar ao utilizador confirmação da gravação conforme mostrado na Fig. 23. Logo que o utilizador tenha confirmado a gravação ou se não existe custo para a gravação, o guia de programas pode emitir um pedido de gravar para o servidor de meios à distância 24. O servidor de meios à distância 24 pode começar a gravar o programa naquele ponto até que o programa termine. Quando a interrupção termina (por exemplo, o utilizador volta para o seu assento), o utilizador pode indicar uma intenção de continuar a assistir ao programa. O servidor de meios à distância 24 pode reproduzir a cópia armazenada de forma temporária do programa enquanto continua a armazenar de forma temporária a parte restante do programa emitido até que o programa emitido termine. O utilizador pode apanhar o programa emitido durante os anúncios ou outros progressos de pouco interesse ao, por exemplo, avançar rápido.
Quando um utilizador indica uma intenção de "rebobinar" um programa armazenado de forma temporária em tempo real para o ponto em que o utilizador começou a gravar, o servidor de meios à distância 24 pode verificar o armazenamento 15 para ver se quaisquer outros utilizadores gravaram o programa ou se o programa está, de qualquer outra forma, ainda disponível. Se não existirem outras cópias do programa disponíveis, o utilizador pode ser restringido a rebobinar apenas para o ponto em que o utilizador começou a gravar. Se desejado, o servidor de meios à distância pode, de forma automática, armazenar de forma temporária, ou de qualquer outra forma gravar de forma temporária todos os programas actuais, programas que estiverem a ser visualizados ou programas para certos assinantes munindo, deste modo, utilizadores ou assinantes com a capacidade de terem controlo 56
ΕΡ 1 662 791/PT total, do tipo de VCR, destes programas gravados ou armazenados de forma temporária. 0 servidor de meios local 29 pode armazenar de forma temporária de uma forma semelhante se desejado. 0 guia de programas também pode munir utilizadores com uma oportunidade de gerir o que está armazenado no servidor de meios à distância 24 e no servidor de meios local 29. 0 guia de programas pode, por exemplo, munir utilizadores com uma oportunidade de eliminar programas que já não sejam desejados. 0 utilizador pode indicar uma intenção de eliminar um programa ao, por exemplo, realçar uma listagem para um programa gravado e premir uma tecla "DEL" no controlo à distância 40, ao seleccionar uma funcionalidade no ecrã de um ecrã de exibição de guia de programas tal como a funcionalidade 159 de ecrã de informação 161 maximizado (Fig. 20) ou através da utilização de qualquer outra abordagem adequada. Quando o utilizador indica uma intenção de eliminar um programa gravado, o guia de programas pode gerar um pedido de eliminar que é transmitido para o servidor de meios à distância 24 ou para o servidor de meios local 29 pelo dispositivo de comunicações 51. Eliminar pedidos pode ser qualquer adequado pedido, mensagem, comunicação baseada em objectos, chamada de procedimento à distância, etc.
Depois de receber um pedido de eliminar, o servidor de meios à distância 24 (para utilizadores da mesma ou de diferentes famílias) ou o servidor de meios local 29 (para utilizadores da mesma família) pode determinar se mais do que um utilizador pediu uma cópia do programa seleccionado. Se apenas um utilizador pediu aquele programa gravado, o servidor de meios à distância 24 pode emitir um comando de eliminar para o dispositivo de armazenamento que armazena o programa seleccionado para eliminar. 0 dispositivo de armazenamento adequado elimina o programa seleccionado do seu armazenamento de meios 63 (Fig. 4) e as directorias de meios 61 e a directoria de utilizadores 59 são actualizadas em conformidade. Se mais do que um utilizador pediu que o programa seja gravado, o servidor de meios à distância 24 pode eliminar a entrada na directoria de utilizador 59 para aquele programa. Se o guia de programas mantiver uma directoria de utilizadores 59, o guia de programas pode 57 ΕΡ 1 662 791/ΡΤ eliminar a entrada. Os servidores de meios locais podem eliminar programas de uma forma semelhante. 0 servidor de meios à distância 24 e o servidor de meios local 29 podem eliminar programas, de forma automática, se desejado. Isto pode ser feito, por exemplo, quando um programa não é acedido por um utilizador durante um período predeterminado de tempo. 0 servidor de meios à distância 24 e o servidor de meios local 29 podem também, de forma automática, eliminar partes de um programa que foi gravado de forma temporária em tempo real. Por exemplo, armazenamento temporário em tempo real pode ser limitado a dez minutos de gravação, limitando, deste modo, a quantidade de gravação que um utilizador pode rebobinar. 0 servidor de meios à distância 24 pode, por exemplo, mudar um programa para meios físicos que são enviados para o utilizador. Outra abordagem adequada envolve a eliminação de programas depois de todos os utilizadores terem visto os mesmos. Os utilizadores podem ser taxados com uma tarifa para a gravação de programas no servidor 29 ou no servidor 24. Se os utilizadores são taxados com uma tarifa, os utilizadores podem ser taxados por unidade de armazenamento consumida, por programa gravado, por reprodução ou podem ser taxados com uma tarifa plana, etc. 0 guia de programas pode munir um utilizador com uma oportunidade de configurar várias configurações relativas ao modo como os programas são gravados ou reproduzidos a partir do servidor de meios à distância 24 ou do servidor de meios local 29. 0 guia de programas pode exibir um ecrã de configuração quando o utilizador indica uma intenção de configurar estas funcionalidades ao, por exemplo, seleccionar uma funcionalidade de "Configuração" do menu principal 102. Um ecrã de configuração ilustrativo 2401 é mostrado na Fig. 24.
Como mostrado na Fig. 24, o utilizador pode definir a língua áudio, formato áudio e o formato vídeo em que o equipamento de televisão de utilizador 22 pode reproduzir programas. 0 utilizador pode mudar as configurações ao, por exemplo, utilizar as teclas de direcção direita ou esquerda. O utilizador pode mudar entre configurações ao, por exemplo, utilizar as teclas de direcção para cima ou para baixo. 58 ΕΡ 1 662 791/ΡΤ
Formatos áudio adequados podem incluir mono, estéreo, som ambiente, etc. Formatos de video adequados podem incluir televisão de alta definição (HDTV), normal, ecrã largo, ecrã estreito, etc. 0 utilizador também pode seleccionar a língua em que a programação de áudio é reproduzida se disponível numa pista de áudio digital. 0 guia de programas pode incluir a língua seleccionada, formato áudio e formato vídeo na gravação de pedidos. 0 servidor de meios à distância 24 ou o servidor de meios local 29 pode gravar programas com apenas aqueles formatos e línguas indicados se os mesmos estiverem disponíveis como parte dos dados de programas associados com os programas. Em alternativa, o guia de programas pode incluir a língua seleccionada, formato áudio e formato vídeo nos pedidos de reprodução. 0 servidor de meios à distância 24 ou o servidor de meios local 29 podem gravar programas com todos os formatos de vídeo e áudio e línguas disponíveis e podem reproduzir programas apenas nos formatos e língua seleccionados (ou qualquer formato ou língua por omissão) quando seleccionados. 0 guia de programas também pode permitir que o utilizador defina "super-programas". Super-programas são sequências de programas ou segmentos de programas que o guia reproduz de forma sequencial numa ordem especificada. A gravação de super-programas ou armazenamento digital com a utilização de guias de programas de televisão interactivos é descrita, por exemplo, no supra-referido Hassell et al. pedido de patente dos Estados Unidos No. de série 09/157.256. O utilizador pode indicar uma intenção de aceder à funcionalidade de super-programa do guia de programas ao, por exemplo, introduzir comandos adequados com o dispositivo de entrada de utilizador 46. Se o dispositivo de entrada de utilizador 46 for um controlo à distância tal como o controlo à distância 40 da Fig. 8, o utilizador pode, por exemplo, utilizar uma tecla "SÚPER" no controlo à distância 40 depois de realçar uma listagem de programas no ecrã de listagem de directorias 350 (Fig. 18d) ou pode seleccionar uma opção de "Super-programa" no ecrã, no ecrã de exibição de guia de programas ou a partir de uma lista de opções no ecrã que são 59 ΕΡ 1 662 791/PT disponibilizadas pelo guia de programas quando uma listagem de programas é seleccionada. 0 guia de programas também pode munir o utilizador com a capacidade de designar super-programas e armazenar os mesmos no servidor de meios à distância 24, no servidor de meios local 29 ou num dispositivo de armazenamento digital 49 opcional. Entradas para os designados super-programas podem ser mantidas em directorias de utilizador mantidas no servidor de meios à distância 24, no servidor de meios local 29 ou no guia de programas e podem ser exibidas em qualquer ecrã adequado que liste entradas de directorias para programas (por exemplo, ecrã de directorias 350 da Fig. 18d). Em alternativa, o guia de programas pode listar listagens de super-programas num ecrã de directorias de super-programas (isto é, num ecrã de directorias dedicado a listar listagens de super-programas) . Por exemplo, quando o ecrã de directorias 350 é exibido pelo guia de programas, o guia de programas pode munir o utilizador com uma oportunidade de seleccionar um designado super-programa.
Quando o utilizador selecciona um designado super-programa, o guia de programas pode gerar um ecrã de super-programa para exibir no dispositivo de exibição 45. O guia de programas também pode munir o utilizador com uma lista no ecrã de opções para executar funções de super-programa (por exemplo, reprodução, transferência ou edição do super-programa) . Quando o utilizador indica uma intenção de definir um super-programa, o guia de programas gera um ecrã de super-programa para exibição no dispositivo de exibição 45. Um ecrã de super-programa ilustrativo 130 é mostrado nas Figs. 25a e 25b. O ecrã de super-programa 130 pode ser organizado em três áreas. A área 131 exibe uma directoria de programas gravados pelo servidor de meios à distância 24, pelo servidor de meios local 29, pelo dispositivo de armazenamento digital 49 ou por qualquer combinação dos mesmos. A área 132 indica a sequência de super-programas. A área de retorno de vídeo 137 exibe partes de programas incluídos no super-programa. O tempo restante para gravação pode ser exibido, por exemplo, para indicar ao utilizador quanto tempo falta no servidor de meios 60 ΕΡ 1 662 791/PT à distância 24 ou no servidor de meios local 29 para gravar em abordagens onde existem limites à gravação de utilizador.
As três áreas de ecrã de super-programa 130 podem ser apresentadas apenas quando necessário. Por exemplo, a área 131 pode ser exibida apenas quando o guia de programas está a munir o utilizador com uma oportunidade de seleccionar um programa gravado. Logo que o utilizador tenha seleccionado um programa, a área 131 pode ser removida e a área 132 pode ser exibida no seu lugar, enquanto o guia de programas está a munir o utilizador com uma oportunidade de definir um segmento de programa para inclusão no super-programa. A área de retorno de video 137 pode ser exibida apenas em resposta a uma indicação pelo utilizador ao guia de programas para exibir um segmento de programa. Deste modo, pode não ser necessário que todas as três áreas sejam exibidas ao mesmo tempo.
Para definir um super-programa, o utilizador indica que programas devem ser incluídos na sequência de super-programa. O guia de programas também pode disponibilizar ao utilizador a capacidade de incluir no super-programa actual outros super-programas definidos previamente. A área 131 lista os programas e super-programas gravados. Se a interface de utilizador é um controlo à distância tal como o controlo à distância 40 da Fig. 8, o utilizador pode utilizar as teclas de direcção para cima e para baixo para seleccionar um programa ou super-programa desejado. O utilizador também pode aceder a outra informação associada com a entrada através da utilização de uma tecla "INFO" no controlo à distância 40, ou ao seleccionar uma opção adequada de uma lista de opções no ecrã disponibilizada pelo guia de programas. O guia de programas pode gerar um ecrã de informação maximizado tal como o ecrã de informação 161 maximizado da Fig. 20, que contém informação associada com o programa seleccionado quando a tecla "INFO" é premida. "Braveheart",
Sempre que o utilizador selecciona um programa, o guia de programas coloca a entrada seleccionada na sequência de super-programa num ponto definido na sequência (por exemplo, no fim da sequência). Como mostrado na Fig. 25a, por exemplo, uma entrada de primeiro segmento, "Braveheart", já foi 61 ΕΡ 1 662 791/ΡΤ seleccionada pelo utilizador. 0 utilizador está no momento a seleccionar a entrada de segundo segmento, "Kiss The Girls". As entradas de segmento estão listadas na segunda área 132. 0 utilizador pode, então, ter a opção de definir o segmento de reprodução do programa a reproduzir. Os indicadores 135 indicam o segmento de reprodução definido no momento.
Se o utilizador deseja definir um segmento de reprodução, o utilizador pode assim fazer, por exemplo, através da utilização de marcadores 136 (Fig. 25b) para definir o segmento ao mudar os marcadores para o instante desejado num programa. Como mostrado na Fig. 25b, o utilizador utiliza a região de realce 134 (colocada pelo guia de programa sobre um dos marcadores) para deslocar os marcadores 136 para definir o segmento de reprodução. 0 guia de programas pode exibir a parte do programa que corresponde aos marcadores 136 na área de retorno de video 137 conforme os marcadores 136 estiverem posicionados individualmente. 0 guia de programas pode, por exemplo, emitir pedidos de reprodução para o servidor de meios à distância 24 ou para o servidor de meios local 29 que incluam um apontador de utilizador para a posição desejada no programa ou desvios da posição actual. Em alternativa, o guia de programas pode enviar pedidos adequados para o servidor de meios à distância 24 ou para o servidor de meios local 29 para ajustar um ou mais apontadores de utilizador no servidor de meios à distância 24 ou no servidor de meios local 29. Quando o utilizador conclui a definição do segmento de reprodução, o utilizador pode premir uma tecla "OK" no controlo à distância 40. Em resposta, o guia de programas posiciona a região de realce 134 (Fig. 25a) na primeira área 131 para permitir que o utilizador defina outra entrada na sequência de super-programa.
Quando o utilizador conclui a definição do super-programa, o utilizador pode emitir comandos adequados com o dispositivo de entrada de utilizador 46. Se o dispositivo de entrada de utilizador 46 for um controlo à distância tal como o controlo à distância 40 da Fig. 8, o utilizador pode utilizar uma tecla “REPRODUZIR" para terminar a edição do super-programa e reproduzir o super-programa. O utilizador pode também seleccionar uma funcionalidade de "Reprodução" no 62 ΕΡ 1 662 791/PT ecrã a partir de uma lista de opções no ecrã disponibilizadas pelo guia de programas. 0 utilizador pode reproduzir o super-programa em qualquer momento depois do super-programa ter sido definido.
Quando o utilizador prime “REPRODUZIR", o guia de programas pode emitir um pedido de reprodução para o servidor de meios à distância 24 ou para o servidor de meios local 29 ou pode emitir as instruções adequadas para o dispositivo de armazenamento digital 49 para ler os programas e dados de programa associados de acordo com a sequência de super-programa definida. Os pedidos de reprodução podem, por exemplo, conter apontadores para as posições nos programas que são definidas pela sequência de super-programa. 0 guia de programa então dá instruções ao equipamento de televisão de utilizador 22 para disponibilizar os programas no super programa e quaisquer dados associados no formato adequado para exibição no dispositivo de exibição 45 e para utilização pelo utilizador como se o utilizador fosse visualizar os programas quando os mesmos foram originalmente emitidos. Se o dispositivo de exibição 45 for uma televisão, por exemplo, o equipamento de televisão de utilizador 22 pode converter os programas do seu formato digital para sinais de vídeo desmodulados ou para RF adequados para exibição no monitor 45. 0 utilizador pode armazenar o super-programa para reprodução num momento posterior. 0 utilizador pode indicar uma intenção de adiar a reprodução ao, por exemplo, emitir comandos adequados com o dispositivo de entrada de utilizador 46. Se o dispositivo de entrada de utilizador 46 for um controlo à distância tal como o controlo à distância 40 da Fig. 8, o utilizador pode utilizar uma tecla "SAIR" no controlo à distância 40 ou seleccionar uma opção "Sair" no ecrã. O guia de programas pode responder a uma indicação para adiar a reprodução ao armazenar a sequência de reprodução (quer na memória 63, quer no dispositivo de armazenamento digital 49, no servidor de meios à distância 24, quer no servidor de meios local 29. O utilizador pode posteriormente aceder ao super-programa ao, por exemplo, seleccionar o super-programa no ecrã de directorias 350. O guia de programas pode, então, gerar um ecrã de super-programas com 63 ΕΡ 1 662 791/ΡΤ as selecções introduzidas e os segmentos de execução definidos previamente e munir o utilizador com a oportunidade de adicionar, editar ou reordenar os programas e segmentos de programas. 0 utilizador reproduz o super programa ao emitir um comando adequado (por exemplo, ao premir uma tecla "REPRODUZIR" no controlo à distância 40).
As Figs. 26 a 31 são fluxogramas ilustrativos de passos envolvidos na operação do sistema do presente invento. Os passos mostrados nas Figs. 26 a 31 são ilustrativos e podem ser executados por qualquer ordem adequada. Vários passos também podem ser eliminados se desejado. A Fig. 26 é um fluxograma de uma visão global ilustrativa de passos envolvidos na gravação de programas e dados de guia de programas no servidor de meios à distância 24 ou no servidor de meios local 29. No passo 2610, o guia de programas mune o utilizador com uma oportunidade de seleccionar um programa para gravação no servidor de meios à distância 24 ou no servidor de meios local 29. Isto pode ser conseguido ao, por exemplo, munir um utilizador com uma oportunidade de gravar um programa enquanto assiste ao mesmo, quer de forma directa, quer em combinação com uma sobreposição de FOLHEAR. Isto também pode ser conseguido ao munir um utilizador com uma oportunidade de seleccionar uma listagem de programas. As listagens de programas podem ser apresentadas pelo guia de programas em vários tipos de ecrãs de listagens de programas, tais como listagens de programas pelo ecrã de tempo 130 (Fig. 11a), listagens de programas pelo ecrã de canal 135 (Fig. 11b), listagens de programas pelo ecrã de categorias (Fig. 11c), numa sobreposição de Pesquisa ou em qualquer outro tipo adequado de ecrã de exibição de guia de programa. Em alternativa, o utilizador pode aceder a listagens de programas através da Internet tal como na arquitectura da Fig. 2e. O utilizador pode também gravar programas ao premir uma tecla "PAUSA" ou "REBOBINAR" no controlo à distância 46 enquanto assiste a um programa para armazenar de forma temporária o programa em tempo real.
Os utilizadores podem também seleccionar programas para gravação pelo servidor de meios à distância 24 ou pelo servidor de meios local 29 ao configurarem consultas de
ΕΡ 1 662 791/PT 6 4 pesquisa que definam tipos de programas que o utilizador quer gravar. 0 utilizador pode, por exemplo, definir expressões booleanas que resultem na gravação de programas com base num parâmetro ou parâmetros adequados. Parâmetros adequados podem incluir quaisquer dados de guia de programas associados com programas, tais como títulos de programas, actores em programas, temas ou categorias de programas, classificações de programas, texto em campos de informação de programas ou quaisquer outros dados de guia de programas adequados.
Quando o utilizador selecciona ou designa um programa para gravação, o guia de programas gera um pedido de gravação (passo 2620). Este passo pode ser executado de forma concorrencial com o passo 2610, imediatamente após o passo 2610 ou algumas vezes num futuro próximo após o passo 2610, tal como, imediatamente antes de um programa começar. Quando um utilizador indica uma intenção de gravar um grupo de programas, o pedido pode incluir um identificador de grupo ou os identificadores de programa dos programas que os constituem. Ainda noutra abordagem, o guia de programas pode gerar pedidos de gravação separados para cada programa no grupo, repetindo o passo 2620. O, ou mais, pedidos de gravação são transmitidos para o servidor de meios de gravação no passo 2640. A transmissão do pedido de gravação pode envolver a utilização de qualquer pilha de protocolos de comunicações adequados. Os pedidos de gravação podem ser transmitidos através da utilização, por exemplo, de TCP/IP, IPX/SPX, DOCSIS, ou qualquer outro protocolo ou grupo de protocolos adequados. Se os utilizadores forem taxados para gravação, o equipamento de distribuição 16 de guia de programas pode disponibilizar informação de facturação para o sistema de facturação 199 (Fig. 1) no passo 2650. A informação de facturação pode incluir o titulo do programa que foi seleccionado, o seu identificador, o seu comprimento, o custo para a gravação ou qualquer outra informação adequada. O sistema de facturação 199 pode facturar o utilizador solicitante ou ajustar a conta do utilizador nos passos 2655 e 2657, respectivamente.
Nos passos 2660 e 2680, o programa e os dados de guia de programa associados são gravados no servidor de meios de 65
ΕΡ 1 662 791/PT gravação, respectivamente. Os passos 2660 e 2680 podem ser realizados por qualquer ordem adequada e podem ser executados de forma concorrencial se desejado. O passo 2660 pode incluir a gravação de dados associados a programa. O passo 2680 pode também ser realizado de forma automática pelo servidor de meios à distância 24 ou pelo servidor de meios no local 29, tal como, quando armazena programas, de forma temporária e automática, em tempo real. A Fig. 27 é um fluxograma algo mais detalhado de passos ilustrativos envolvidos na gravação de programas, de dados de guia de programas ou de qualquer combinação dos mesmos, no servidor de meios à distância 24 ou no servidor de meios local 29 (por exemplo, passos 2660 e 2680 da Fig. 26). No passo 2810, são recebidos pedidos de gravação pelo servidor de meios à distância 24 ou pelo servidor de meios local 29. Os pedidos de gravação são colocados em lista, numa lista de tarefas no passo 2820. No passo 2840, pedidos semelhantes são consolidados. Os pedidos consolidados e não consolidados são colocados em lista no passo 2860. A lista de tarefas pode ser examinada no passo 2880 para determinar se utilizadores suficientes pediram cada programa para gravação. As entradas na lista de tarefas podem ser examinadas, por exemplo, 15 minutos antes de um programa ser agendado para emissão. Se demasiado poucos utilizadores pediram um dado programa, os utilizadores que pediram o programa podem ser notificados (passo 2890) e o guia de programas pode gravar o programa localmente através da utilização, por exemplo, do servidor de meios local 29, do dispositivo de armazenamento digital 49 opcional (Fig. 9), ou do dispositivo de armazenamento secundário 47 opcional (Fig. 9) (passo 2900) . Em alternativa, programas podem ser gravados em meios físicos e enviados para utilizadores (passo 2905).
No passo 2910, equipamento adequado na instalação de distribuição 16 de guias de programas (por exemplo, equipamento de distribuição 21) sintoniza o canal (analógico ou digital) onde o programa solicitado é disponibilizado. Isto pode ser feito, por exemplo, em resposta a um pedido pelo servidor de meios à distância 24. No passo 2920, o programa é gravado em formato analógico ou digital em 66 ΕΡ 1 662 791/ΡΤ armazenamento no servidor de meios à distância 24 ou no servidor de meios local 29.
Directorias de utilizador podem ser actualizadas no passo 2940. Directorias de utilizador podem ser mantidas pelo servidor de meios à distância 24, pelo servidor de meios local 29, pelo guia de programas, ou por qualquer combinação dos mesmos. Directorias de utilizador que são mantidas pelo servidor de meios à distância 24 ou pelo servidor de meios local 29 podem ser actualizadas no passo 2945. O servidor de meios local 29 pode manter uma directoria de utilizadores para apenas aqueles programas que o mesmo grava no armazenamento 3 7 (Fig. 7) ou pode manter uma cópia das directorias de utilizador mantidas pelo servidor de meios à distância 24 para um ou mais utilizadores de um servidor de meios local 29. 0 guia de programas pode manter directorias de utilizador para um ou mais utilizadores localmente na memória 63 (Fig. 9), no dispositivo de armazenamento digital 49 opcional ou no dispositivo de armazenamento secundário 47 opcional (passo 2950). As directorias de utilizador mantidas pelo guia de programas podem reflectir os programas armazenados pelo servidor de meios à distância 24, pelo servidor de meios local 29, ou por ambos, e podem também ser mantidas pelo guia de programas no servidor de meios local 29 se desejado. Pode ser desejável para o guia de programas manter de forma exclusiva directorias de utilizador. Noutra abordagem adequada, no entanto, o guia de programas pode manter cópias de directorias de utilizador que são mantidas pelo servidor de meios à distância 24 e pelo servidor de meios local 29. Em alternativa, directorias de utilizador podem ser mantidas de forma exclusiva pelo servidor de meios à distância 24 ou pelo servidor de meios local 29 e disponibilizadas para o guia de programas a pedido. A Fig. 28 é um fluxograma de uma visão global ilustrativa de passos envolvidos na reprodução de programas, de dados de guia de programas ou de qualquer combinação dos mesmos, a partir do servidor de meios à distância 24 ou do servidor de meios local 29. No passo 2700, o guia de programas mune o utilizador com uma oportunidade de 67 ΕΡ 1 662 791/PT seleccionar o programa gerado para reprodução a partir do servidor de meios à distância 24 ou do servidor de meios local 29. Isto pode ser concretizado ao, por exemplo, apresentar ao utilizador uma directoria de programas gravados. A directoria pode ser sobreposta no topo de um programa de televisão a que o utilizador está a assistir (por exemplo, como com a sobreposição 320 da Fig. 18a), pode ser sobreposta no topo de um ecrã de exibição de guia de programas (por exemplo, como com a sobreposição 320 das Figs. 18b e 18c), pode ser exibido num ecrã de exibição de guia de programas dedicado (por exemplo, como com o ecrã de directorias 350 da Fig. 18d) ou pode ser exibido numa página Web tal como na arquitectura da Fig. 2e. Em alternativa, podem ser apresentadas aos utilizadores listagens de programas para programas gravados ou programas seleccionados para gravação nos ecrãs de listagens de programas normais tais como mostrado nas Figs. 11a, lb e 11c. O utilizador pode seleccionar ou designar um programa para reprodução ao, por exemplo, seleccionar a listagem para o programa de uma lista ou de outro ecrã de exibição de guia de programas. Depois do utilizador designar um programa para reprodução (por exemplo, ao seleccionar uma listagem e premir uma tecla "REPRODUZIR" no controlo à distância 40), o guia de programas gera um pedido de reprodução que é transmitido para o servidor de meios à distância 24 ou para o servidor de meios local 29 (passos 2720 e 2740). Pedidos de reprodução podem ser transmitidos através da utilização, por exemplo, de TCP/IP, IPX/SPX, DOCSIS ou de qualquer outro protocolo ou protocolos adequados. Se os utilizadores forem taxados para reprodução de programas, o equipamento de distribuição 16 de guia de programas pode disponibilizar informação de facturação para o sistema de facturação 199 (Fig. 1) no passo 2750. A informação de facturação pode incluir o titulo do programa que foi seleccionado, o seu identificador, o seu comprimento, o custo para a reprodução ou qualquer outra informação adequada. O sistema de facturação 199 pode facturar o utilizador solicitante ou ajustar a conta do utilizador nos passos 2755 e 2757, respectivamente. Nos passos 2760 e 2780, o programa e os dados de guia de programa associados são reproduzidos a partir do servidor de meios de gravação e apresentados ao utilizador (por exemplo, na 68 ΕΡ 1 662 791/ΡΤ televisão 36 do utilizador da Fig. 7 ou no PC 231 da Fig. 2e) . A Fig. 29 é um fluxograma com mais algum detalhe dos passos ilustrativos envolvidos na reprodução de programas a partir do servidor de meios à distância 24 e do servidor de meios local 29. No passo 2960, uma parte de um programa seleccionado para reprodução é armazenada de forma temporária pelo servidor de meios à distância 24 ou pelo servidor de meios local 29. Pode ser desejável, por exemplo, armazenar de forma temporária o programa completo se os recursos de sistema o permitirem. O passo 2960 também pode incluir o passo 2965 onde o servidor de meios à distância 24 ou o servidor de meios local 29 determinar que a parte do programa já foi armazenada de forma temporária (isto é, para outro utilizador). Neste caso, não é necessária uma cópia adicional.
No passo 2980, o servidor de meios à distância 24 ou o servidor de meios local 29 distribui o programa para o equipamento de televisão de utilizador 22 para reprodução. Os programas e os seus dados de guia de programas associados são reproduzidos no equipamento de televisão de utilizador 22 ou no PC 231 no passo 2990. Os programas e os dados de guia de programas podem ser distribuídos e reproduzidos através da utilização de qualquer abordagem adequada. Por exemplo, programas e dados de guia de programas podem ser reproduzidos pelo servidor de meios 24 e distribuídos para o equipamento de televisão de utilizador 22 para visualização em tempo real. Se programas e dados de guia de programas forem distribuídos como sequência de dados digitais, o equipamento de televisão de utilizador 22 pode descodificar a sequência de dados em tempo real. Estes programas e dados de guia de programas a pedido podem ser distribuídos e reproduzidos de acordo com preferências que foram configuradas pelo utilizador. Numa segunda abordagem adequada, programas e dados de guia de programas são distribuídos como um ou mais ficheiros digitais ou como uma sequência de dados digitais e são armazenados pelo equipamento de televisão de utilizador 22 para reprodução. Numa terceira abordagem adequada, programas e dados de guia de programas são reproduzidos pelo servidor de meios à distância 24 e distribuídos de acordo com 69 ΕΡ 1 662 791/PT uma agenda sobre um canal analógico ou digital através da utilização de uma abordagem próxima de video a pedido (NVOD) adequada. Ainda noutra abordagem adequada, o servidor de meios à distância 24 pode gravar programas e dados de guia de programas em meios físicos, tais como um DVD ou videocassete, que são enviados para o utilizador. Qualquer combinação destas abordagens ou qualquer outra abordagem adequada, também pode ser utilizada.
No passo 3000, o guia de programas mune o utilizador com controlo do programa do tipo VCR. O guia de programa pode exibir uma sobreposição, tal como a sobreposição 141 da Fig. 22, para indicar a um utilizador quando o utilizador parou, colocou em pausa, rebobinou ou avançou rápido o programa. No passo 3010, o servidor de meios à distância 24 ou o servidor de meios local 29 pode ajustar o apontador de utilizador numa parte de programa ou pode deslocar o apontador para a parte de programa seguinte. Apontadores de utilizador podem ser avançados, por exemplo, à medida que um programa é reproduzido normalmente ou quando um programa está a ser controlado tal como quando o mesmo está a ser avançado de forma rápida. Num ponto adequado antes de um apontador de utilizador ser ajustado para além do início ou do fim de uma parte de programa, a parte de programa anterior ou seguinte pode ser armazenada de forma temporária (passo 2960). Os dados de guia de programa podem ser apresentados e representados, de modo tal que, os mesmos sigam o programa que está a ser controlado pelo utilizador através da utilização do guia de programas de televisão interactivo. A Fig. 30 é um fluxograma de passos ilustrativos envolvidos em munir o utilizador com acesso a cópias de programas armazenadas de modo temporário em tempo real. No passo 3020, o servidor de meios à distância 24 ou o servidor de meios local 29 armazena de forma temporária um programa enquanto o mesmo está a ser emitido. O passo 3020 pode ser realizado pelo servidor de meios à distância 24 ou pelo servidor de meios local 29, de forma automática, ou pode ser realizado quando um utilizador indica uma intenção de armazenar de forma temporária um programa em tempo real (por exemplo, ao premir uma tecla "PAUSA" no controlo à distância 40 durante a visualização de um programa). No passo 3040, o programa é reproduzido no equipamento de televisão de 70 ΕΡ 1 662 791/PT utilizador 22 enquanto o utilizador é munido com controlo do programa do tipo VCR. Quando o utilizador indica uma intenção de executar uma função do tipo VCR, o guia de programas pode emitir um pedido para o servidor de meios à distância 24 ou para o servidor de meios local 29 para ajustar o apontador de utilizador para a posição de visualização do utilizador na cópia armazenada de forma temporária. Quando o utilizador concluiu a visualização da cópia armazenada de forma temporária, tal como quando o programa já terminou, quando o utilizador avança de forma rápida para o fim ou quando o utilizador prime a tecla parar, o guia de programas pode emitir um pedido de eliminação para o servidor de meios à distância 24 ou para o servidor de meios local 29 para eliminar o mesmo ou o mesmo pode ser eliminado de forma automática.
Os passos envolvidos na disponibilização da funcionalidade de super-programa do presente invento estão expressos na Fig. 31. O guia de programas grava programas e dados de guia de programas associados no servidor de meios à distância 24, no servidor de meios local 29 ou no dispositivo de armazenamento digital 49 no passo 3110. No passo 3120, é definida a sequência de super-programa. Isto pode incluir a exibição de um ecrã de super-programa, tal como o ecrã de super-programa 130 das Fig. 5a e 5b, no dispositivo de exibição 45 como expresso no passo 3140. Os programas gravados são listados pelo guia de programas no dispositivo de exibição 45 no passo 3160 e o guia de programas mune um utilizador com uma oportunidade de seleccionar os programas listados no passo 3180. No passo 3200, o guia de programas mune o utilizador com uma oportunidade para definir segmentos de exibição. O guia de programas pode exibir um indicador e marcador de segmento de reprodução para definir o segmento de reprodução, como indicado pelo passo 3220. No passo 3240, o guia de programas exibe uma área de retorno de video no dispositivo de exibição 45. O guia de programas exibe os programas, segmentos de reprodução e dados de programas associados que fazem parte da sequência de super-programa no dispositivo de exibição 45 de acordo com a sequência de super-programa no passo 3260.
Lisboa, 2013-08-26
Claims (8)
- ΕΡ 1 662 791/ΡΤ 1/3 REIVINDICAÇÕES 1 - Método para utilização num sistema guia de programas de televisão interactivo que mune uma pluralidade de utilizadores com acesso a programas numa pluralidade de equipamento de utilizador configurado para apresentar vídeo a partir de um servidor, compreendendo o método: disponibilização de vídeo para a pluralidade de equipamento de utilizador a partir de um dispositivo de armazenamento; gravação de um programa para o servidor, em resposta à recepção de um pedido de gravação para gravar o programa, em que o pedido gravado é gerado por um utilizador que utiliza um guia de programas de televisão interactivo num equipamento da pluralidade de equipamento de utilizador; criação de uma entrada para o programa gravado numa directoria de utilizador de programas gravados pelo utilizador; recepção de um pedido de eliminação gerado pelo utilizador através da utilização do guia de programas de televisão interactivo e, em resposta ao pedido de eliminação; eliminação da entrada para o programa na directoria de utilizadores, se mais do que um utilizador solicitou que o programa seleccionado seja gravado; e eliminação do programa do servidor se apenas um utilizador solicitou que o programa seleccionado seja gravado e actualização da directoria de utilizador em conformidade.
- 2 - Método da reivindicação 1, em que pelo menos um da pluralidade de equipamento de utilizador compreende um dispositivo de armazenamento, compreendendo também o método o armazenamento do programa no dispositivo de armazenamento do dado equipamento de utilizador. ΕΡ 1 662 791/PT 2/3
- 3 - Método da reivindicação 1 que também compreende a gravação da dados de guia de programas com o programa no servidor.
- 4 - Método da reivindicação 1, em que o servidor é um servidor de meios à distância.
- 5 - Sistema guia de programas de televisão interactivo que mune os utilizadores com acesso a programas, compreendendo o sistema guia de programas de televisão interactivo: uma pluralidade de equipamento de utilizador, estando cada qual configurado para apresentar vídeo; um servidor que está ligado a cada um da pluralidade de equipamento de utilizador e que está configurado para disponibilizar vídeo para a pluralidade de equipamento de utilizador; meios para gravação de um programa para o servidor em resposta a um pedido de gravar gerado por um utilizador que utiliza o guia de programas de televisão interactivo; meios para criação de uma entrada para o programa gravado numa directoria de utilizador de programas gravados pelo utilizador; meios para recepção de um pedido de eliminação gerado pelo utilizador através da utilização do guia de programas de televisão interactivo; meios para eliminação da entrada para o programa na directoria de utilizador, se mais do que um utilizador solicitou que o programa seleccionado seja gravado; e meios para eliminação do programa do servidor se apenas um utilizador solicitou que o programa seleccionado seja gravado e actualização da directoria de utilizador em conformidade. ΕΡ 1 662 791/PT 3/3
- 6 - Sistema da reivindicação 5, em que pelo menos um da pluralidade de equipamento de utilizador compreende um dispositivo de armazenamento e também compreende meios para armazenar o programa no dispositivo de armazenamento do dado equipamento de utilizador.
- 7 - Sistema da reivindicação 6 que também compreende meios para gravação de dados de guia de programas com o programa no servidor.
- 8 - Sistema da reivindicação 5, em que o servidor é um servidor de meios à distância. Lisboa, 2013-08-26
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