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    • 5. 发明申请
    • SIGNAL GENERATION AND BROADCASTING
    • 信号发生和广播
    • WO1998043430A1
    • 1998-10-01
    • PCT/EP1997002106
    • 1997-04-25
    • CANAL+ SOCIETE ANONYMEFICHET, LaurentDE LA TULLAYE, PierreDE SARZENS, PhilipJEZEQUEL, Jean-François
    • CANAL+ SOCIETE ANONYME
    • H04N07/167
    • G06T9/007G06F9/4843G06F11/10G06F11/1435G06Q20/04G06Q20/06G06Q20/1235G06Q20/341G06Q20/342G06Q20/4033G06Q20/40975G07F7/025G07F7/08G07F7/1008G07F17/0014G11C16/105H04H20/51H04H40/90H04H60/14H04N5/4401H04N7/163H04N7/165H04N7/1675H04N7/17309H04N7/17318H04N17/004H04N21/235H04N21/2543H04N21/258H04N21/26266H04N21/26606H04N21/435H04N21/4367H04N21/44236H04N21/4437H04N21/4622H04N21/4623H04N21/47211H04N21/4782H04N21/8166H04N21/8355
    • The invention includes a mostly conventional digital television system (2000) to transmit compressed digital signals. A multiplexer (2004) receives a plurality of further input signals, assembles one or more transport streams and transmits compressed digital signals to a transmitter (2008) of the broadcast centre via linkage (2010). The transmitter (2008) transmits electromagnetic signals via uplink (2012) towards a satellite transponder (2014), where they are electronically processed and broadcast via notional downlink (2016) to earth receiver (2018). The signals received by receiver (2018) are transmitted to an integrated receiver/decoder (2020) connected to the end user's television set (2022). The receiver/decoder (2020) decodes the compressed MPEG-2 signal into a television signal for the television set (2022). A conditional access system (3000) is connected to the multiplexer (2004) and the receiver/decoder (2020), and is located partly in the broadcast centre and partly in the decoder. It enables the end user to access digital television broadcasts from one or more broadcast suppliers. A smartcard, capable of decrypting messages relating to one or several television programmes sold by the broadcast supplier, can be inserted into the receiver/decoder (2020). Using the decoder (2020) and smartcard, the end user may purchase commercial offers in either a subscription mode or a pay-per-view mode. A number of features of particular interest are disclosed, involving the randomization of EMMs, mixing parameter length and identifier on EMMs and the like to save space, dynamic allocation of bandwidth for specific EMMs, and the STM being separate from the SMS.
    • 本发明包括用于传输压缩数字信号的大多数传统的数字电视系统(2000)。 多路复用器(2004)接收多个另外的输入信号,组装一个或多个传输流,并通过链接(2010)将压缩的数字信号发送到广播中心的发射机(2008)。 发射机(2008)通过上行链路(2012)向卫星转发器(2014)发送电磁信号,在那里它们被电子处理,并通过概念下行链路(2016)广播到接收机(2018)。 由接收器(2018)接收的信号被发送到连接到最终用户的电视机(2022)的集成接收机/解码器(2020)。 接收机/解码器(2020)将压缩的MPEG-2信号解码为电视机的电视信号(2022)。 条件接收系统(3000)连接到多路复用器(2004)和接收机/解码器(2020),并且部分地位于广播中心中,部分位于解码器中。 它使终端用户能够访问来自一个或多个广播供应商的数字电视广播。 可以将能够解密与由广播供应商销售的一个或多个电视节目有关的消息的智能卡插入到接收机/解码器(2020)中。 使用解码器(2020)和智能卡,最终用户可以以订阅模式或按付费模式购买商业报价。 公开了一些特别令人感兴趣的特征,涉及EMM的随机化,EMM上的混合参数长度和标识符等以节省空间,针对特定EMM的带宽的动态分配以及与SMS分离的STM。
    • 9. 发明申请
    • DOWNLOADING A COMPUTER FILE FROM A TRANSMITTER VIA A RECEIVER/DECODER TO A COMPUTER
    • 通过接收器/解码器将电脑文件从传输器下载到计算机
    • WO1998043162A1
    • 1998-10-01
    • PCT/EP1997002109
    • 1997-04-25
    • CANAL+ SOCIETE ANONYMEMEILLAUD, EugeneBEUQUE, Jean-Bernard, Gérard, Maurice
    • CANAL+ SOCIETE ANONYME
    • G06F09/445
    • G06F11/10G06T9/007H04N7/17309H04N21/258H04N21/40
    • The file, or a part thereof, is divided into a series of R groups of data, and each of the groups is subdivided into a series of C blocks of the data. A group of C redundancy blocks is generated, each redundancy block being related to respective ones of the data blocks in the R groups by being a bitwise exclusive OR or NOR of those data blocks. Each of the groups of data blocks and the group of redundancy blocks are repeatedly transmitted from the transmitter. At the receiver/decoder, at least some of the transmitted blocks are received and supplied to the computer. The computer is used to determine for at least one of the received redundancy blocks whether that redundancy block and all except one of its respective data blocks have been received, and if so regenerate said one data block. Lost data blocks can be regenerated without waiting for retransmitting.
    • 文件或其一部分被分成一系列R组的数据,并且每个组被细分为数据的一系列C块。 生成一组C冗余块,每个冗余块通过作为这些数据块的按位异或运算而与R组中的各个数据块相关。 从发送器重复发送数据块组和冗余块组中的每一组。 在接收机/解码器处,传送的块中的至少一些被接收并提供给计算机。 计算机用于确定所接收的冗余块中的至少一个是否已经接收到该冗余块以及除了其相应的数据块中的一个以外的所有冗余块,并且如果是,则重新生成所述一个数据块。 可以重新生成丢失的数据块,而无需重新发送。