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发明授权
US06904090B2 METHOD FOR PROTECTION OF DATA REPRODUCTION ACCORDING TO MEDIUM PROTECTION DATA, POSITION INFORMATION AND FIRST AND SECOND APPARATUS PROTECTION DATA TO DETERMINE A RANGE OF PROTECTION FOR MAIN DATA AT SPECIFIED POSITIONS AND WHETHER SAID MAIN DATA ARE REPRODUCED IN THEIR ENTIRETY, PARTIALLY, OR NOT AT ALL 失效
用于保护根据中间保护数据，位置信息和第一和第二装置保护数据的数据再现的方法，用于确定在指定位置处的主数据的保护范围，以及是否在主体数据中实时地部分或不全面地重现数据

METHOD FOR PROTECTION OF DATA REPRODUCTION ACCORDING TO MEDIUM PROTECTION DATA, POSITION INFORMATION AND FIRST AND SECOND APPARATUS PROTECTION DATA TO DETERMINE A RANGE OF PROTECTION FOR MAIN DATA AT SPECIFIED POSITIONS AND WHETHER SAID MAIN DATA ARE REPRODUCED IN THEIR ENTIRETY, PARTIALLY, OR NOT AT ALL
摘要：
In a reproduction apparatus, for reproducing an original signal conveyed as main data by a data medium such as a recording disk or broadcasting system, with medium protection data which are specific to the data medium being conveyed together with the main data, the apparatus includes a section for generating apparatus protection data which are specific to the reproduction apparatus, a section for combining the apparatus protection data with the medium protection data to define a protection level, and a section for applying the protection level to restrict reproduction of the original signal, with stepwise variations in restriction occurring in accordance with changes in protection level. The medium protection data may include information for specifying restricted reproduction of portions of the original signal, such as by producing degraded resolution within specified regions of specified frames of a video signal.
摘要（中）：

在再现装置中，为了再现通过诸如记录盘或广播系统的数据介质作为主数据传送的原始信号，具有与主数据一起传送的数据介质特有的介质保护数据，该装置包括： 用于生成特定于再现设备的设备保护数据的部分，用于将设备保护数据与介质保护数据组合以定义保护等级的部分，以及用于应用保护等级以限制原始信号的再现的部分， 根据保护水平的变化，限制发生逐步变化。 介质保护数据可以包括用于指定原始信号的部分的受限再现的信息，例如通过在视频信号的指定帧的指定区域内产生劣化的分辨率。

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