Motion picture file encryption method and digital rights management method using the same
    1.
    发明授权
    Motion picture file encryption method and digital rights management method using the same 失效
    运动图像文件加密方法和数字版权管理方法使用相同

    公开(公告)号:US08755524B2

    公开(公告)日:2014-06-17

    申请号:US11006738

    申请日:2004-12-08

    IPC分类号: H04N7/167

    摘要: A method of encrypting a motion picture file and a method of digital rights management using the same, wherein encryption method includes: extracting information on the location of at least one video sample, which is a real-time streaming unit, from meta-data of the motion picture file; extracting the video samples based on the location information; encrypting the extracted video samples, excluding a start code within a video sample header of each extracted video sample, based on predetermined encryption information; and producing an encrypted motion picture file by recombining the encrypted video samples. Since the file is encrypted in units of video object planes (VOPs) while maintaining an MEPG-4 file format, the encryption method can be easily applied to a completed file format and streaming service is also possible.

    摘要翻译: 一种加密运动图像文件的方法和使用其的数字版权管理方法,其中,加密方法包括:从作为实时流传输单元的至少一个视频样本的位置的元数据中提取关于位置的信息, 电影文件; 基于位置信息提取视频样本; 基于预定的加密信息对所提取的视频样本进行加密,排除每个提取的视频样本的视频样本报头内的起始码; 以及通过重新组合加密的视频样本来产生加密的运动图像文件。 由于文件以视频对象平面(VOP)为单位进行加密,同时保持MEPG-4文件格式,所以加密方法可以很容易地应用于完整的文件格式,并且流媒体服务也是可能的。