公开(公告)号：US20190230316A1

公开(公告)日：2019-07-25

申请号：US16367667

申请日：2019-03-28

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Masayuki KOZUKA ,  Kaoru MURASE ,  Masaya YAMAMOTO

IPC: H04N5/913 ,  H04N9/82 ,  H04N9/804 ,  G11B20/00 ,  H04N21/4402 ,  H04N21/835 ,  H04N21/432

Abstract: 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.

公开(公告)号：US20150127948A1

公开(公告)日：2015-05-07

申请号：US14595447

申请日：2015-01-13

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Masao NONAKA ,  Yuichi FUTA ,  Toshihisa NAKANO ,  Kaoru YOKOTA ,  Motoji OHMORI ,  Masaya MIYAZAKI ,  Masaya YAMAMOTO ,  Kaoru MURASE ,  Senichi ONODA

IPC: H04L9/32 ,  G06F21/62 ,  G06F21/64 ,  G06F21/10

CPC classification number: H04L9/3247 ,  G06F21/10 ,  G06F21/6209 ,  G06F21/64 ,  G06F2221/0773 ,  H04L9/3236 ,  H04L2209/60 ,  Y10S707/99942

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20180139406A1

公开(公告)日：2018-05-17

申请号：US15869485

申请日：2018-01-12

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Masayuki KOZUKA ,  Kaoru MURASE ,  Masaya YAMAMOTO

IPC: H04N5/913 ,  H04N9/804 ,  G11B20/00 ,  H04N21/835 ,  H04N21/4402 ,  H04N21/432 ,  H04N9/82 ,  H04N5/85

CPC classification number: H04N5/913 ,  G11B20/00086 ,  G11B20/00188 ,  G11B20/00731 ,  G11B20/00818 ,  H04N5/85 ,  H04N9/8042 ,  H04N9/8205 ,  H04N21/4325 ,  H04N21/4402 ,  H04N21/835 ,  H04N2005/91371

Abstract: 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.