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公开(公告)号:EP2401867A1
公开(公告)日:2012-01-04
申请号:EP10746857.1
申请日:2010-02-25
IPC分类号: H04N7/167
CPC分类号: G11B20/00086 , G06F21/10 , G11B20/00115 , G11B20/0021 , G11B20/00246 , G11B20/00362 , G11B20/0042 , G11B20/00427 , G11B20/00442 , G11B20/00731 , G11B20/00746 , G11B20/00855 , G11B20/00869 , G11B20/00927 , H04L9/002 , H04L67/38 , H04L2209/16 , H04L2209/605
摘要: A method of renewing encryption applied to a content file in a playback device comprising determining a specified variant of at least one microcode function to be used in playing back the content file, determining if variants are stored in internal memory on the playback device to determine if the specified variant is included in the stored variants, retrieving the specified variant from a variant storage in a memory located In a media device in communication with the playback device, if the specified variant is not included in the stored variants, and using the specified variant to access the content file.
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公开(公告)号:EP3279898A4
公开(公告)日:2018-07-18
申请号:EP15871286
申请日:2015-11-20
发明人: YAHATA HIROSHI
IPC分类号: G11B20/00 , H04N5/85 , H04N5/913 , H04N21/432 , H04N21/4405 , H04N21/845
CPC分类号: G11B20/00246 , G11B20/00181 , G11B20/0042 , G11B20/005 , G11B20/00514 , H04N5/85 , H04N5/913 , H04N21/4325 , H04N21/44055 , H04N21/8456 , H04N2005/91364
摘要: In a playback method of a playback device that plays a system stream file including encrypted video information, the system stream file includes a first segment in which is repeated a first data unit that can be decrypted using a first decryption key that the playback device has and a second data unit of the same data size as the first data unit but cannot be decrypted by the first decryption key, and a second segment which can all be decrypted using a second decryption key that differs from the first decryption key. The playback method reads the system stream file, and performs conversion processing to convert the system stream file that has been read out into a post-conversion system stream, in which the second data unit in the first segment in the system stream file that has been read out is replaced with a plurality of continuous invalid packets, and outs the post-conversion system stream.
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公开(公告)号:EP3279898A1
公开(公告)日:2018-02-07
申请号:EP15871286.9
申请日:2015-11-20
发明人: YAHATA, Hiroshi
CPC分类号: G11B20/00246 , G11B20/00181 , G11B20/0042 , G11B20/005 , G11B20/00514 , H04N5/85 , H04N5/913 , H04N21/4325 , H04N21/44055 , H04N21/8456 , H04N2005/91364
摘要: In a playback method of a playback device that plays a system stream file including encrypted video information, the system stream file includes a first segment in which is repeated a first data unit that can be decrypted using a first decryption key that the playback device has and a second data unit of the same data size as the first data unit but cannot be decrypted by the first decryption key, and a second segment which can all be decrypted using a second decryption key that differs from the first decryption key. The playback method reads the system stream file, and performs conversion processing to convert the system stream file that has been read out into a post-conversion system stream, in which the second data unit in the first segment in the system stream file that has been read out is replaced with a plurality of continuous invalid packets, and outs the post-conversion system stream.
摘要翻译: 在播放包括加密的视频信息的系统流文件的播放装置的播放方法中,系统流文件包括第一段和第二段,在所述第一段中重复可以使用播放设备具有的第一解密密钥解密的第一数据单元, 具有与第一数据单元相同的数据大小但不能被第一解密密钥解密的第二数据单元以及能够使用不同于第一解密密钥的第二解密密钥解密的第二片段。 该重放方法读取系统流文件,并且执行转换处理,以将已读出的系统流文件转换为转换后系统流,其中系统流文件中的第一段中的第二数据单元已被 读出被替换为多个连续的无效分组,并且将转换后的系统流输出。
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公开(公告)号:EP2401867A4
公开(公告)日:2013-11-13
申请号:EP10746857
申请日:2010-02-25
IPC分类号: G11B20/00 , G06F21/44 , G06F21/73 , G06K19/07 , G11B20/10 , H04K1/00 , H04L9/00 , H04L9/08 , H04L29/08 , H04N21/414
CPC分类号: G11B20/00086 , G06F21/10 , G11B20/00115 , G11B20/0021 , G11B20/00246 , G11B20/00362 , G11B20/0042 , G11B20/00427 , G11B20/00442 , G11B20/00731 , G11B20/00746 , G11B20/00855 , G11B20/00869 , G11B20/00927 , H04L9/002 , H04L67/38 , H04L2209/16 , H04L2209/605
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