Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Sony Corporation

Koninklijke Philips Corporation N.v.

Panasonic Intellectual Property Corporation of America

Other

Microsoft Technology Licensing, LLC

Matshushita Electric Industrial Co., Ltd.

Koninklijke Philips Electronic N.v.

Kaoru Murase

Kazuhiro Tsuga

Tomoyuki Okada

Masayuki Kozuka

Kazuhiko Yamauchi

Katsuhiko Miwa

Masaya Yamamoto

Shinichi Saeki

Toshihisa Nakano

Yoshihisa Fukushima

Noriko Sugimoto

Tokuo Nakatani

Yoshiho Gotoh

Motoji Ohmori

Senichi Onoda

Shin Asada

Yuichi Futa

Masaya Miyazaki

Takahiro Yamaguchi

Kaoru Yokota

Masao Nonaka

Hiroshi Kato

Miyuki Sasaki

Tomoyuki Nonomura

Yasushi Tamakoshi

Tadamasa Toma

Hiroshi Yahata

Tomoki Ogawa

Shunji Harada

Masataka Minami

Minehisa Nagata

Motoki Kato

Wilhelmus Jacobus Van Gestel

Tateo Oishi

Tatsushi Bannai

Masanobu Nakamura

Makoto Morise

Yoshitomo Osawa

Jun Yonemitsu

Hideshi Ishihara

Katsumi Muramatsu

Sanzo Ugawa

Takashi Yamanishi

Makoto Tatebayashi

Yoshikazu Takashima

Kenjiro Ueda

James Morris Alkove

Kouichi Uchimura

Kazuyuki Murata

Masahiro Kageyama

Yasushi Uesaka

Tamotsu Ito

Clifford Paul Strom

Ryuji Inoue

Takahiro Nagai

Ian Cameron Mercer

Yoshikatsu Ito

Ryoji Suzuki

Kenji Hisatomi

Steven Broeils Luitjens

Jeffrey Richard McKune

Masato Yamamichi

Akira Date

Kevin Leigh LaChapelle

Naohiko Noguchi

Masami Yamamichi, Legal Representative

Satomi Yamamichi, Legal Representative

Keiko Yamamichi, Legal Representative

Mitsuhiro Sato

Shingo Matsumoto

Michael Jay Parks

Shinichi Matsui

Takashi Shimojima

Yoshihiko Motohashi

Jun'ichi Kubota

Yukio Yagi

Yusuke Shimizu

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.

Playback method and playback device

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.

Information processing method, information processor, and recording medium

A method is provided that includes receiving a command for reading out content from a non-transitory recording medium, and identifying first version information indicating a version of a content copyright protection method. The method includes identifying second version information indicating a version of a protocol used in authentication of the host apparatus, and determining whether the authentication is to be approved or not. The method also includes authenticating the host apparatus according to a result of the determination, reading out medium-specific information, and sending the medium-specific information to the authenticated host apparatus. The method further includes reading out the encrypted content and sending the encrypted content to the authenticated host apparatus, wherein the first version information is identified based on disk information that is meta data stored at a beginning of the recording medium formed in a disk shape in the identifying first version information.

Content reading method for reading out copyright-protected content from non-transitory recording medium, content reading apparatus, and non-transitory recording medium

A file generating method according to one aspect of the present disclosure is a file generating method for generating an MP4 file, the file generating method including: step Sof acquiring an original file made in a file format different from MP4; step Sof acquiring a difference file including data that is not included in the original file; step Sof acquiring a procedure file indicating a procedure for generating the MP4 file; and step Sof generating the MP4 file by combining the data included in the difference file and data included in the original file in accordance with the procedure indicated in the procedure file.

File generating method and file generating apparatus

A content reading method includes identifying first version information indicating a version of a content copyright protection method of an optical disk based on this optical disk, identifying second version information indicating a version of a protocol used in authentication of a host apparatus, determining whether the authentication is to be approved or not by comparing the first version information and the second version information, authenticating the host apparatus according to a result of the determination, reading out, from the optical disk, Volume ID used in decrypting an encrypted content and sending it to the authenticated host apparatus, and 0 the encrypted content from the optical disk and sending it to the authenticated host apparatus.

Provided is an information processing device including a data processing unit that executes reproduction processing of content recorded in an information recording medium. The content includes an individual segment region formed of a plurality of variation data in which identification information different from each other is embedded and each of which can be decrypted by a different key, and a common segment region formed of single data. The variation data is formed of a 6144 byte aligned unit. The data processing unit calculates a reproduction path by applying a device key held in a memory, and selects an aligned unit corresponding to one variation data that corresponds to the calculated reproduction path from a plurality of aligned units configuring the plurality of variation data in the individual segment region included in the data read from the information recording medium, and then, executes the decryption and reproduction processing.

Information processing device, information recording medium, information processing method, and program

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.

File producing method, file producing device, and recording medium

A content recording method for a recording apparatus includes the following steps: an automatic recording control step of automatically recording a first plurality of pieces of content in a channel automatic recording area, each of the first plurality of pieces of content being broadcast through a channel in a time slot; a deletion step of instructing a mobile apparatus to delete a first piece of content that has previously been copied or moved from the channel automatic recording area to the mobile apparatus when the recording apparatus detects that the recording apparatus has become able to communicate with the mobile apparatus; and a content transfer step of copying or moving a second piece of content included in the first plurality of pieces of content to the mobile apparatus when the recording apparatus detects that the recording apparatus has become able to communicate with the mobile apparatus.

Content recording method, recording apparatus, and recording system

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.

Unauthorized contents detection system

Provided is a revocation list generation device that can suppress an increase in the amount of data of a revocation list. A revocation list generation device that generates a revocation list includes an acquisition unit that acquires, for a content, a revocation identifier identifying a revoked public key certificate allocated to an apparatus related to use of the content, a revocation list generation unit that generates a revocation list including the acquired revocation identifier associated with the content, and an output unit that outputs the revocation list.

Revocation list generation device, revocation list generation method, and content management system

A terminal device includes a transmission/reception unit that transmits, to a server device, information necessary for judgment as to whether to permit use of content. The server device includes a judgment unit that judges whether to permit the terminal device to use the content, based on terminal device management information set by a content provider, and the information necessary for the judgment and received from the terminal device. A notification data storage unit stores notifications to be presented to a user of the terminal device; and a transmission/reception unit transmits either information necessary for use of the content or one of the notifications according to a result of the judgment by the judgment unit.

Content management system, management server, memory media device and content management method

A terminal devicethat is connected to a key distribution devicevia a network, and in which a recording medium deviceis mounted, the key distribution devicebeing for distributing a title key necessary for use of content, the recording medium devicebeing for storing therein the content and the title key. The recording medium deviceand the key distribution deviceperform mutual authentication and share shared keys that are identical to each other. The terminal devicecomprises: a reception unit that receives an encrypted title key from the key distribution device, the encrypted title key being the title key encrypted with the shared key of the key distribution device; and a transfer unitthat transmits the encrypted title key to the recording medium device. Upon completion of the mutual authentication between the recording medium deviceand the key distribution device, the reception unit and the transfer unitrefrain from any involvement with communication data except reception and transmission thereof, the communication data being exchanged between the recording medium deviceand the key distribution devicewith use of the shared keys.

Terminal device, content recording system, title key recording method, and computer program

Growing community of inventors

Nara, Japan

Kaoru Murase