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    • 4. 发明申请
    • REPRODUCTION OF A TRICK PLAY SIGNAL
    • 复制播放信号
    • WO2005050999A1
    • 2005-06-02
    • PCT/IB2004/052375
    • 2004-11-10
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.MOORS, Eric, W., J.RIJCKAERT, Albert, M., A.
    • MOORS, Eric, W., J.RIJCKAERT, Albert, M., A.
    • H04N7/24
    • H04N21/4623G11B27/005G11B27/105H04N5/783H04N9/8042H04N21/4405H04N21/8455
    • A trick play signal is derived from a stored, and typically encrypted video stream. The video stream comprises data representing a series of I frames and P or B frames encoded at a variable bit rate, the I-frames being decodable independent of any other frame, decoding of the P or B frames requiring reference to other frames. Selected segments of data are retrieved from the video stream. Each segment corresponds to a part of data from the stream with a selected length. Distances between successive retrieved segments are selected dependent on a trick play speed. A trick play video signal is generated that comprises an earliest first frame from each respective segment. Stream specific properties of the stream are determined that are indicative of a rate at which the I-frames occur in the stream. The selected length for use in said selective retrieving is computed from the properties that have been determined, so that on the basis of the properties the segments of said selected length are predicted to include data representing at least one whole first frame at least on average.
    • 特技播放信号是从存储的,通常加密的视频流导出的。 视频流包括表示一系列I帧和以可变比特率编码的P或B帧的数据,I帧可解码,独立于任何其他帧,对需要引用其他帧的P或B帧进行解码。 从视频流检索所选择的数据段。 每个段对应于来自具有所选长度的流的数据的一部分。 根据特技播放速度选择连续检索到的段之间的距离。 产生包含来自每个相应段的最早的第一帧的特技播放视频信号。 确定流的流特定属性,其表示I帧在流中发生的速率。 用于所述选择性检索的所选择的长度是根据已经确定的属性计算的,因此基于属性,预测所述选定长度的段至少包括平均至少一个整个第一帧的数据。
    • 5. 发明申请
    • SYSTEM FOR MODIFYING THE TIME-BASE OF A VIDEO SIGNAL
    • 修改视频信号时基的系统
    • WO2004056126A1
    • 2004-07-01
    • PCT/IB2003/005934
    • 2003-12-15
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.SALOMONS, Eduard, W.RIJCKAERT, Albert, M., A.
    • SALOMONS, Eduard, W.RIJCKAERT, Albert, M., A.
    • H04N7/62
    • H04N21/4344H04N21/4147H04N21/4305H04N21/4334H04N21/43632
    • A storage device 500 includes an input 405 for receiving a digital video stream complying with a predetermined video encoding standard via a digital video communication system. The stream includes a sequence of digital video frames, a sequence of program clock reference stamps (PCR) and a sequence of video presentation time stamps (PTS). A time-base modifier 510 replaces the PTS's by respective modified video presentation time stamps (M-PTS) based on a constant predetermined frame time between successive presentation time stamps and replaces the PCR's by respective modified program clock reference stamps (M-PCR) by scaling the PCR's using a scaling factor that depends on a ratio of an expected time between a video presentation time stamp j and a preceding video presentation time stamp j-n and an actual time between the video presentation time stamp j and the preceding video presentation time stamp j-n , where j≥n>0 . The expected time is n times the predetermined frame time.
    • 存储装置500包括用于经由数字视频通信系统接收符合预定视频编码标准的数字视频流的输入405。 流包括一系列数字视频帧,一系列程序时钟参考标记(PCR)和一系列的视频呈现时间戳(PTS)。 时基修饰符510基于连续呈现时间戳之间的恒定预定帧时间,通过相应修改的视频呈现时间戳(M-PTS)来替换PTS,并通过相应修改的程序时钟参考标记(M-PCR)由PCR修改 使用取决于视频呈现时间戳j和之前的视频呈现时间戳jn之间的期望时间的比率的比例因子以及视频呈现时间戳j和之前的视频呈现时间戳jn之间的实际时间来缩放PCR ,其中j> = n> 0。 预期时间是预定帧时间的n倍。
    • 8. 发明申请
    • SECURE TRANSFER OF CONTENT OWNERSHIP
    • 内部所有权的安全转让
    • WO2007086015A2
    • 2007-08-02
    • PCT/IB2007/050249
    • 2007-01-25
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.PETKOVIC, MilanLI, HongRIJCKAERT, Albert, M., A.MOORS, Eric, W., J.
    • PETKOVIC, MilanLI, HongRIJCKAERT, Albert, M., A.MOORS, Eric, W., J.
    • G06F21/00
    • G06F21/10
    • A method and system for ownership transfer of digital content, in a secure system using digital rights management (DRM) to handle user access to stored content, comprising receiving instructions from a first user being a current owner of a piece of content to transfer ownership of said piece of content to a second user, granting said second user an ownership takeover right to said piece of content, said ownership takeover right only being grantable by a current owner, receiving an accept from said second user, and identifying said second user as new current owner of said piece of content. According to this solution, the transfer of the ownership can be handled at the level of digital rights management, by introducing new rights (e.g. an "Ownership Takeover" right). This moves the ownership transfer protocol from the device specific implementations to the DRM specific implementations, which allows transfer of ownership between interoperable DRM systems.
    • 一种用于数字内容的所有权转让的方法和系统,在使用数字版权管理(DRM)来处理对存储的内容的用户访问的安全系统中,包括接收来自作为一条内容的当前所有者的第一用户的指令, 向所述第二用户表示所述内容,向所述第二用户授予对所述内容的所有权接管权,所述所有权接管权仅由当前所有者授予,接收来自所述第二用户的接受,并将所述第二用户标识为新的 目前所有者的内容。 根据这一解决方案,所有权的转让可以通过引入新的权利(例如“所有权接管权”)在数字版权管理层面处理。 这将所有权转让协议从设备特定实现转移到DRM特定实现,这允许在可互操作的DRM系统之间传递所有权。