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33 条记录 (耗时 0.017 秒)

    WATERMARK GENERATOR, WATERMARK DECODER, METHOD FOR PROVIDING A WATERMARKED SIGNAL BASED ON DISCRETE VALUED DATA AND METHOD FOR PROVIDING DISCRETE VALUED DATA IN DEPENDENCE ON A WATERMARKED SIGNAL
    31.
    发明公开
    WATERMARK GENERATOR, WATERMARK DECODER, METHOD FOR PROVIDING A WATERMARKED SIGNAL BASED ON DISCRETE VALUED DATA AND METHOD FOR PROVIDING DISCRETE VALUED DATA IN DEPENDENCE ON A WATERMARKED SIGNAL 有权
    水印生成器，WASSERZEICHENDEKODIERER，一种用于提供与水MARK标记信号基于离散数据值和方法提供分散式数据值作为水痕MARK信号的功能

    公开(公告)号：EP2619757A1

    公开(公告)日：2013-07-31

    申请号：EP11757629.8

    申请日：2011-09-16

    申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

    发明人： KRÄGELOH, Stefan ,  GREEVENBOSCH, Bert ,  DEL GALDO, Giovanni ,  BORSUM, Juliane ,  PICKEL, Jörg ,  ZITZMANN, Reinhard ,  BLIEM, Tobias

    IPC分类号： G10L19/00

    CPC分类号： H04N1/32203 ,  G06T1/0021 ,  G06T1/0028 ,  G10L19/018 ,  H04N1/32144 ,  H04N21/8358

    摘要： A watermark generator for providing a watermark signal as a sequence of subsequent watermark coefficients based on a stream of subsequent stream values representing discrete valued data comprises a differential encoder. The differential encoder is configured to apply a phase rotation to a current stream value of the stream values representing the discrete valued data or to a current watermark symbol, the current watermark symbol corresponding to a current stream value of the stream values representing the discrete valued data, to obtain a current watermark coefficient of the watermark signal. The differential encoder is configured to derive a phase of a previous spectral coefficient of a watermarked signal which is a combination of the host signal and the watermark signal. The differential encoder is further configured to provide the watermark signal such that a phase angle of the phase rotation applied to the current stream value or the current watermark symbol is dependent on the phase of the previous spectral coefficient of the watermarked signal.

    摘要翻译： 用于提供水印的信号作为基于表示离散值数据随后流值的流随后水印系数的序列的水印发生器包括差分编码器。 差分编码器被配置为将相位旋转应用于表示离散值数据或到当前水印符号，当前水印符号对应于表示离散值数据流的值的电流流值流值的电流流值 ，以得到水印信号的当前水印系数。 差分编码器是被配置为导出水印信号的所有这是主机信号和水印信号的组合的先前频谱系数的相位。 差分编码器进一步被配置为提供所述水印信号搜索没有施加到电流流值或当前水印符号的相位旋转的相位角依赖于加水印信号的先前频谱系数的相位。

    KONZEPT ZUR EFFIZIENTEN VERTEILUNG EINER ZUGANGSBERECHTIGUNGSINFORMATION
    32.
    发明公开
    KONZEPT ZUR EFFIZIENTEN VERTEILUNG EINER ZUGANGSBERECHTIGUNGSINFORMATION 审中-公开
    概念条件访问信息而有效地分配

    公开(公告)号：EP2269156A1

    公开(公告)日：2011-01-05

    申请号：EP09735531.7

    申请日：2009-04-21

    申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

    发明人： BARTEL-KURZ, Birgit ,  KRÄGELOH, Stefan ,  PROSCH, Markus ,  ZEH, Rinat

    IPC分类号： G06F21/00

    CPC分类号： G06F21/10 ,  G06F2221/0764

    摘要： The invention relates to a device (100) for controlling service access authorisation for a user device in relation to an access restricted service. Said device comprises a service authorisation access provider (101) that is designed to control, corresponding to an authorisation message (103) provided with a service-dependent user identification (102), a period of time during which the service authorisation access (104) is present exists and to deactivate (105) authorisation that allows the service authorisation access (104) to be extended or reactivated using the previous service-dependent user identification (102), if at least one predetermined duration (123) has elapsed since the end of the last authorised time interval (106) for which one service authorisation access (104) was determined by the device (100).