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公开(公告)号：US10291879B2
公开(公告)日：2019-05-14
申请号：US15869485
申请日：2018-01-12
发明人： Masayuki Kozuka , Kaoru Murase , Masaya Yamamoto
IPC分类号： H04N9/80 , G11B27/00 , H04N5/913 , H04N21/432 , H04N21/835 , H04N21/4402 , G11B20/00 , H04N9/804 , H04N9/82 , H04N5/93 , H04N5/85
摘要： A playback method according to one aspect of the present disclosure is performed by a Blu-ray device connected to a display device. The playback method includes obtaining, from a recording medium, output control information of content recorded on the recording medium; obtaining, from the recording medium, a video signal of the content recorded on the recording medium; and (a) outputting the obtained video signal to the display device without converting image quality of the video signal, when the obtained output control information does not restrict output of content using a first copyright protection technology, and (b) converting the image quality of the obtained video signal and outputting the video signal to the display device, when the obtained output control information restricts output of content using the first copyright protection technology and output using the first copyright protection technology is performed according to a type of the display device.
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公开(公告)号：US09912903B2
公开(公告)日：2018-03-06
申请号：US15012917
申请日：2016-02-02
发明人： Masayuki Kozuka , Kaoru Murase , Masaya Yamamoto
IPC分类号： H04N9/80 , G11B27/00 , H04N5/913 , H04N21/432 , H04N21/835 , H04N21/4402 , G11B20/00 , H04N9/804 , H04N9/82 , H04N5/93 , H04N5/85
CPC分类号： H04N5/913 , G11B20/00086 , G11B20/00188 , G11B20/00731 , G11B20/00818 , H04N5/85 , H04N9/8042 , H04N9/8205 , H04N21/4325 , H04N21/4402 , H04N21/835 , H04N2005/91371
摘要： A playback method according to one aspect of the present disclosure is performed by a Blu-ray device connected to a display device. The playback method includes obtaining, from a recording medium, output control information of content recorded on the recording medium; obtaining, from the recording medium, a video signal of the content recorded on the recording medium; and (a) outputting the obtained video signal to the display device without converting image quality of the video signal, when the obtained output control information does not restrict output of content using a first copyright protection technology, and (b) converting the image quality of the obtained video signal and outputting the video signal to the display device, when the obtained output control information restricts output of content using the first copyright protection technology and output using the first copyright protection technology is performed according to a type of the display device.
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公开(公告)号：US09818446B2
公开(公告)日：2017-11-14
申请号：US15003745
申请日：2016-01-21
发明人： Tadamasa Toma , Tomoki Ogawa , Hiroshi Yahata , Masayuki Kozuka , Kaoru Murase , Masaya Yamamoto
IPC分类号： H04N5/917 , G11B20/12 , H04N5/85 , H04N21/4402 , H04N21/432 , H04N9/82 , H04N21/482 , G11B27/30 , G11B27/32 , G11B20/10 , G11B27/031 , H04N9/804 , H04N9/806 , H04N21/236 , H04N21/262 , H04N21/84 , H04N21/854
CPC分类号： G11B20/1217 , G11B20/10 , G11B27/031 , G11B27/3036 , G11B27/329 , H04N5/85 , H04N9/8042 , H04N9/806 , H04N9/8205 , H04N9/8211 , H04N9/8233 , H04N21/236 , H04N21/26258 , H04N21/4325 , H04N21/4402 , H04N21/4825 , H04N21/84 , H04N21/85406
摘要： A method according to one aspect of the present disclosure includes the steps of: acquiring a play list including identification information indicating each of a plurality of elementary streams; selecting an elementary stream indicated by predetermined identification information from the acquired play list; acquiring a difference file including data that is not included in the selected elementary stream; and converting the selected elementary stream into an MP4 file format by combining data included in the difference file and data included in the selected elementary stream based on a manifest file corresponding to the selected elementary stream, the manifest file being necessary for the conversion of a file format based on a predetermined rule.
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公开(公告)号：US08972737B2
公开(公告)日：2015-03-03
申请号：US14155712
申请日：2014-01-15
发明人： Masao Nonaka , Yuichi Futa , Toshihisa Nakano , Kaoru Yokota , Motoji Ohmori , Masaya Miyazaki , Masaya Yamamoto , Kaoru Murase , Senichi Onoda
IPC分类号： G06F12/14 , G06F21/10 , G06F21/62 , G06F21/64 , H04L9/32 , H04L29/06 , G06F11/30 , G06F12/00
CPC分类号： H04L9/3247 , G06F21/10 , G06F21/6209 , G06F21/64 , G06F2221/0773 , H04L9/3236 , H04L2209/60 , Y10S707/99942
摘要： A data processing device for playing back a digital work reduces the processing load involved in verification by using only a predetermined number of encrypted units selected randomly from multiple encrypted units constituting encrypted contents recorded on a DVD. In addition, the data processing device improves the accuracy of detecting unauthorized contents by randomly selecting a predetermined number of encrypted units every time the verification is performed.
摘要翻译： 用于再现数字作品的数据处理装置通过仅使用构成加密内容的多个加密单元随机选择的预定数量的加密单元来减少验证中所涉及的处理负担。 此外，数据处理装置通过在每次执行验证时随机选择预定数量的加密单元来提高检测未授权内容的准确性。
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公开(公告)号：US10455189B2
公开(公告)日：2019-10-22
申请号：US16367667
申请日：2019-03-28
发明人： Masayuki Kozuka , Kaoru Murase , Masaya Yamamoto
IPC分类号： H04N9/80 , G11B27/00 , H04N5/913 , H04N21/432 , H04N21/835 , H04N21/4402 , G11B20/00 , H04N9/804 , H04N9/82 , H04N5/93 , H04N5/85
摘要： A playback method according to one aspect of the present disclosure is performed by a Blu-ray device connected to a display device. The playback method includes obtaining, from a recording medium, output control information of content recorded on the recording medium; obtaining, from the recording medium, a video signal of the content recorded on the recording medium; and (a) outputting the obtained video signal to the display device without converting image quality of the video signal, when the obtained output control information does not restrict output of content using a first copyright protection technology, and (b) converting the image quality of the obtained video signal and outputting the video signal to the display device, when the obtained output control information restricts output of content using the first copyright protection technology and output using the first copyright protection technology is performed according to a type of the display device.
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公开(公告)号：US10419789B2
公开(公告)日：2019-09-17
申请号：US15046491
申请日：2016-02-18
发明人： Masayuki Kozuka , Masaya Yamamoto , Kaoru Murase , Tadamasa Toma
IPC分类号： G06F21/10 , H04N21/2347 , G06F21/60 , G11B20/00 , H04N5/85 , H04N9/79 , H04N21/41 , H04N21/433 , H04N21/4405 , H04N21/4408 , H04N21/4627 , H04N21/8355 , H04N21/854 , H04N9/804
摘要： A method includes: holding a device key provided to an information processing terminal; reading an encrypted content and conversion control information from a recording medium; decoding the read encrypted content using the held device key to obtain a decoded content; converting the decoded content into an export format to obtain an export content; generating playback right information indicating that the information processing terminal can play back the converted export content according to the read conversion control information; and controlling whether the playback right information can be generated according to a first flag.
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公开(公告)号：US09270470B2
公开(公告)日：2016-02-23
申请号：US14595447
申请日：2015-01-13
发明人： Masao Nonaka , Yuichi Futa , Toshihisa Nakano , Kaoru Yokota , Motoji Ohmori , Masaya Miyazaki , Masaya Yamamoto , Kaoru Murase , Senichi Onoda
IPC分类号： G06F21/00 , H04L9/32 , G06F21/10 , G06F21/62 , G06F21/64 , G06F11/30 , G06F12/00 , G06F12/14
CPC分类号： H04L9/3247 , G06F21/10 , G06F21/6209 , G06F21/64 , G06F2221/0773 , H04L9/3236 , H04L2209/60 , Y10S707/99942
摘要： A data processing device for playing back a digital work reduces the processing load involved in verification by using only a predetermined number of encrypted units selected randomly from multiple encrypted units constituting encrypted contents recorded on a DVD. In addition, the data processing device improves the accuracy of detecting unauthorized contents by randomly selecting a predetermined number of encrypted units every time the verification is performed.
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