公开(公告)号：US09369754B2

公开(公告)日：2016-06-14

申请号：US14304721

申请日：2014-06-13

Applicant: QUALCOMM Incorporated

Inventor： Ron Keidar ,  Chenxi Zhang

IPC: G06F3/00 ,  H04N21/426 ,  H04N21/44 ,  H04N21/4405 ,  H04N21/4627 ,  H04N21/414 ,  H04N21/418 ,  H04L9/00 ,  G06F21/00

CPC classification number: H04N21/42623 ,  G06F21/00 ,  G09C1/00 ,  H04L9/00 ,  H04L2209/603 ,  H04N21/41407 ,  H04N21/4182 ,  H04N21/44004 ,  H04N21/4405 ,  H04N21/4627

Abstract: Disclosed is an apparatus and method to determine usage rules for video content by buffer tracking. A computing device may include a secure processor configured to: store digital rights management (DRM) rules associated with a DRM key and usage rules for a session; command a cryptoprocessor to decrypt video content with the DRM key and to log an output buffer designation of the command to decrypt the video content. The secure processor may command a buffer tracking table to store the output buffer designation of the cryptoprocessor of the command to decrypt and the associated usage rules and a plurality of input and output buffer designations from a plurality of video content drivers, such that, based upon a buffer designation from an output driver to display video content received by the secure processor, the secure processor may determine usage rules to be applied to the decrypted video content for display.

Abstract translation: 公开了一种通过缓冲器跟踪来确定视频内容的使用规则的装置和方法。 计算设备可以包括安全处理器，其被配置为：存储与DRM密钥相关联的数字版权管理（DRM）规则和会话的使用规则; 命令密码处理器用DRM密钥解密视频内容，并记录命令的输出缓冲区指定以解密视频内容。 安全处理器可以命令缓冲器跟踪表来存储命令的密码处理器的输出缓冲器指定以解密和相关联的使用规则以及来自多个视频内容驱动器的多个输入和输出缓冲器指定，使得基于 来自输出驱动器的缓冲器指定以显示由安全处理器接收的视频内容，安全处理器可以确定要应用于解密的视频内容以供显示的使用规则。