Patents by Inventor Kenjiro Ueda

Kenjiro Ueda has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10572394
    Abstract: A configuration capable of performing reliable source analysis of illegal copy content using content in which a reproduction path is settable is implemented. Content in which an individual segment region including a plurality of pieces of variation data which include different identification information embedded therein and are decryptable using different keys and a common segment region including single data are provided, and variation data is configured with an aligned unit is set. A content reproducing device calculates a reproduction path by applying a device key and selects and reproduces an aligned unit corresponding to the reproduction path on the basis of a variation data identifier recorded in an adaptation field in a plain text region at the head of a plurality of aligned units constituting the variation data.
    Type: Grant
    Filed: November 13, 2015
    Date of Patent: February 25, 2020
    Assignee: SONY CORPORATION
    Inventors: Kenjiro Ueda, Ryohei Takahashi
  • Publication number: 20200045263
    Abstract: A configuration capable of recording MMT format data on a medium as BDAV format data and performing copy control according to the original copy control information is achieved. The MMT format data, for which copy control information is set, is input and recorded on an information recording medium as BDAV format data. As record data, (a) a stream file including a packet string in which the MMT format data is stored, and (b) copy control information corresponding to the stream file, in which the copy control information corresponding to the MMT format data is reflected, are generated and recorded as an additional header of a packet included in the stream file or as another file.
    Type: Application
    Filed: January 22, 2018
    Publication date: February 6, 2020
    Inventors: KOUICHI UCHIMURA, KENJIRO UEDA
  • Publication number: 20200013431
    Abstract: A configuration is realized in which block encryption MMT format data is reproduced by applying a time stamp. An MMT format stream file and a reproduction control information file are generated and recorded in a medium. The stream file includes encryption block data to which an encryption key generated by using an additional header in which copy control information of a block unit is stored, as a seed, is applied, and the additional header. Position identification information capable of determining a position of reproduction data, a position of the seed to be applied to decoding of the reproduction data, a position of the time stamp, and a position of the seed to be applied to decoding of the time stamp is recorded in the reproduction control information file. Data decoding, and reproduction to which the time stamp is applied are performed by using recording information.
    Type: Application
    Filed: March 8, 2018
    Publication date: January 9, 2020
    Inventors: KENJIRO UEDA, KOUICHI UCHIMURA
  • Publication number: 20190339061
    Abstract: An optical axis or a diameter of light of even a light beam having a non-uniform intensity distribution is stably obtained. An outer shape of a range of a light intensity having a specified ratio with respect to a total light intensity on a cross-section of a light beam is obtained. An approximate circle is obtained from this outer shape. For example, the approximate circle is calculated by using the least-squares method. An optical axis and/or a diameter of light of the light beam is obtained on the basis of this approximate circle.
    Type: Application
    Filed: January 15, 2018
    Publication date: November 7, 2019
    Inventors: HIROSHI MORITA, KAZUAKI TOBA, MASANARI YAMAMOTO, KENJIRO UEDA, RYOHEI TAKAHASHI
  • Publication number: 20180239879
    Abstract: A configuration in which usage control that is substantially similar to content usage control in a copy source medium can be performed in a content copy destination is implemented. A data processing unit that performs a copy process of recording data recorded on a first medium on a second medium records encrypted content in the first medium on the second medium, without decrypting the encrypted content. In addition, the data processing unit converts a CPS unit key file recorded on the first medium to generate a converted CPS unit key file and records the converted CPS unit key file on the second medium. Further, the data processing unit acquires an MKB not requiring KCD, which is capable of directly calculating a media key using only a device key, without using key conversion data (KCD) recorded on the first medium, from a server and records the MKB not requiring KCD on the second medium.
    Type: Application
    Filed: August 19, 2016
    Publication date: August 23, 2018
    Inventors: KENJIRO UEDA, TATEO OISHI
  • Patent number: 10020019
    Abstract: An information processing device includes: a data processing unit that executes a process of reproducing content recorded in a medium; and a memory storing a content revocation list in which an identifier (ID) of revoked content is recorded, wherein the data processing unit compares a minimum allowable version of a content revocation list recorded in a token which is management data corresponding to content recorded in the medium with a version of a content revocation list acquired from the memory, and when the version of the content revocation list acquired from the memory is an old version lower than the minimum allowable version of the content revocation list recorded in the token, the data processing unit halts determination on revocation of content based on the content revocation list acquired from the memory and reproduction of content.
    Type: Grant
    Filed: June 2, 2011
    Date of Patent: July 10, 2018
    Assignee: Sony Corporation
    Inventors: Kenjiro Ueda, Koji Yoshimura, Hiroshi Kuno, Takamichi Hayashi, Munetake Ebihara
  • Patent number: 9865299
    Abstract: 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.
    Type: Grant
    Filed: November 18, 2015
    Date of Patent: January 9, 2018
    Assignees: SONY CORPORATION, PANASONIC CORPORATION
    Inventors: Kenjiro Ueda, Tateo Oishi, Kouichi Uchimura, Masaya Yamamoto, Kaoru Murase, Hiroshi Yahata
  • Publication number: 20170322890
    Abstract: A configuration capable of performing reliable source analysis of illegal copy content using content in which a reproduction path is settable is implemented. Content in which an individual segment region including a plurality of pieces of variation data which include different identification information embedded therein and are decryptable using different keys and a common segment region including single data are provided, and variation data is configured with an aligned unit is set. A content reproducing device calculates a reproduction path by applying a device key and selects and reproduces an aligned unit corresponding to the reproduction path on the basis of a variation data identifier recorded in an adaptation field in a plain text region at the head of a plurality of aligned units constituting the variation data.
    Type: Application
    Filed: November 13, 2015
    Publication date: November 9, 2017
    Inventors: KENJIRO UEDA, RYOHEI TAKAHASHI
  • Patent number: 9811670
    Abstract: An information processing device including: a data processing unit that generates an encryption key of content; and a communication unit that transmits an encryption key generated by the data processing unit, wherein the data processing unit generates, as the encryption key, individual keys that are different for each new content recording processing on a recording medium in a content recording device, and transmits the individual keys through the communication unit.
    Type: Grant
    Filed: October 24, 2014
    Date of Patent: November 7, 2017
    Assignee: Sony Corporation
    Inventors: Hiroshi Kuno, Kenjiro Ueda, Munetake Ebihara, Takamichi Hayashi, Koji Yoshimura
  • Patent number: 9734306
    Abstract: Disclosed is a structure that includes: an information processing apparatus that stores content into an information storage device such as a memory card including an access allowed block based on an access right check made on each block, and uses the content; a content usage managing server that provides content usage permission information to the information processing apparatus; and a content correspondence information providing server that provides the encryption key to be used in decrypting the encrypted content stored in the information storage device. The content usage managing server determines the block for storing the encryption key and notifies the content correspondence information providing server of a block identifier that is the identifier of the determined block, and the content correspondence information providing server performs a process to write the encryption key into the block corresponding to the received block identifier.
    Type: Grant
    Filed: March 25, 2013
    Date of Patent: August 15, 2017
    Assignee: SONY CORPORATION
    Inventors: Kenjiro Ueda, Hiroshi Kuno, Yoshiyuki Kobayashi
  • Publication number: 20170220783
    Abstract: A configuration in which a reliable source of illegal copy content is analyzed using content in which a reproduction path can be set is realized. Content which has a segment area including a plurality of items of variation data which can be decrypted using different keys and in which a reproduction path corresponding to the selected variation data can be set is used. Each item of variation data is configured such that embedded information such as a digital watermark can be acquired from decrypted data. Each item of variation data includes a 192-byte source packet or a 6144-byte aligned unit. A reproduction device selects and reproduces one item of variation data from each segment area on the basis of a variation data identifier recorded in the variation data.
    Type: Application
    Filed: July 24, 2015
    Publication date: August 3, 2017
    Applicant: SONY CORPORATION
    Inventors: Yoshiyuki KOBAYASHI, Kenjiro UEDA
  • Patent number: 9590953
    Abstract: Provided is an information processing device including: a data processing unit that performs a content playback process; and a communication unit that communicates with a server, wherein the content is content that has a segment region configured with a plurality of pieces of variation data which can be respectively decrypted by different keys, and for which a plurality of playback paths can be configured according to variation data which is selected as a playback object, wherein each piece of variation data is data for which a variation data identifier can be analyzed from decrypted data, and wherein the data processing unit receives playback path information which is allowed to be played from the server through the communication unit, and selects variation data from the segment region so as to perform content playback, according to the playback path information received from the server.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: March 7, 2017
    Assignees: SONY CORPORATION, SONY PICTURES ENTERTAINMENT INC.
    Inventors: Kenjiro Ueda, Tateo Oishi, Yoshikazu Takashima
  • Patent number: 9398330
    Abstract: Provided is an information processing device including: a data processing unit that performs format conversion of converting MPEG-2 TS format data into MP4 format data, wherein the MPEG-2 TS format data is data that includes each segment region having a plurality of pieces of variation data decryptable with different keys, and wherein the data processing unit selects encrypted MP4 variation data from the segment region of the MPEG-2 TS format data and stores the MP4 variation data as MP4 format structure data in an MP4 file, while the encrypted variation data remains, without performing a decryption process and a re-encryption process for the selected MP4 variation data.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: July 19, 2016
    Assignees: SONY CORPORATION, SONY PICTURES ENTERTAINMENT INC.
    Inventors: Kenjiro Ueda, Tateo Oishi, Yoshikazu Takashima
  • Publication number: 20160155466
    Abstract: 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.
    Type: Application
    Filed: November 18, 2015
    Publication date: June 2, 2016
    Applicants: SONY CORPORATION, PANASONIC CORPORATION
    Inventors: Kenjiro UEDA, Tateo OISHI, Kouichi UCHIMURA, Masaya YAMAMOTO, Kaoru MURASE, Hiroshi YAHATA
  • Patent number: 9311956
    Abstract: An information processing device includes: a data processing unit that executes a process of reproducing content recorded in a medium, wherein the data processing unit acquires a token from the medium, the token being management data corresponding to content recorded in the medium, compares a server ID recorded in the acquired token with a server ID recorded in a server certificate acquired from a server from which the management data is acquired, and halts reproduction of content when the two server IDs are not identical.
    Type: Grant
    Filed: June 8, 2011
    Date of Patent: April 12, 2016
    Assignee: SONY CORPORATION
    Inventors: Kenjiro Ueda, Koji Yoshimura, Hiroshi Kuno, Takamichi Hayashi, Munetake Ebihara
  • Publication number: 20160057491
    Abstract: Provided is an information processing device including: a data processing unit that performs format conversion of converting MPEG-2 TS format data into MP4 format data, wherein the MPEG-2 TS format data is data that includes each segment region having a plurality of pieces of variation data decryptable with different keys, and wherein the data processing unit selects encrypted MP4 variation data from the segment region of the MPEG-2 TS format data and stores the MP4 variation data as MP4 format structure data in an MP4 file, while the encrypted variation data remains, without performing a decryption process and a re-encryption process for the selected MP4 variation data.
    Type: Application
    Filed: December 17, 2014
    Publication date: February 25, 2016
    Applicants: Sony Corporation, Sony Pictures Entertainment Inc.
    Inventors: Kenjiro UEDA, Tateo Oishi, Yoshikazu Takashima
  • Publication number: 20160057112
    Abstract: Provided is an information processing device including: a data processing unit that performs a content playback process; and a communication unit that communicates with a server, wherein the content is content that has a segment region configured with a plurality of pieces of variation data which can be respectively decrypted by different keys, and for which a plurality of playback paths can be configured according to variation data which is selected as a playback object, wherein each piece of variation data is data for which a variation data identifier can be analyzed from decrypted data, and wherein the data processing unit receives playback path information which is allowed to be played from the server through the communication unit, and selects variation data from the segment region so as to perform content playback, according to the playback path information received from the server.
    Type: Application
    Filed: December 17, 2014
    Publication date: February 25, 2016
    Applicants: Sony Corporation, Sony Pictures Entertainment Inc.
    Inventors: Kenjiro UEDA, Tateo OISHI, Yoshikazu TAKASHIMA
  • Patent number: 9171570
    Abstract: An information processing apparatus includes: a data processing unit which performs copy processing for recording recorded data of a first medium in a second medium, wherein the data processing unit receives playlist sequence information which represents the use sequence of a playlist applied to reproduction processing of copy data recorded in the second medium, from a management server and performs processing for generating an attribute file which stores the playlist sequence information and recording the generated attribute file in the second medium.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: October 27, 2015
    Assignee: Sont Corporation
    Inventors: Yoshiyuki Kobayashi, Tateo Oishi, Kenjiro Ueda, Kazuo Yamamoto, Motoki Kato
  • Publication number: 20150143135
    Abstract: The present disclosure realizes a structure that can unify the management of the storage block for the encryption key to be used in decrypting encrypted content stored in a memory card. This structure includes: an information processing apparatus that stores content into an information storage device such as a memory card including an access allowed block based on an access right check made on each block, and uses the content; a content usage managing server that provides content usage permission information to the information processing apparatus; and a content correspondence information providing server that provides the encryption key to be used in decrypting the encrypted content stored in the information storage device.
    Type: Application
    Filed: March 25, 2013
    Publication date: May 21, 2015
    Inventors: Kenjiro Ueda, Hiroshi Kuno, Yoshiyuki Kobayashi
  • Patent number: 9037867
    Abstract: A configuration for achieving efficient content verification processing based on hash values is provided. Hash values of hash units set as segmented data of a content stored on an information storage medium are recorded in a content hash table and are stored on the information storage medium together with the content. An information processing apparatus for executing content playback executes hash-value comparison processing based on one or more randomly selected hash values. Regardless of the data amount of content, the configuration can perform hash-value determination and comparison processing based on hash units having a small amount of data, so that user equipment for executing content playback can perform efficient content verification.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: May 19, 2015
    Assignee: Sony Corporation
    Inventors: Kenjiro Ueda, Tateo Oishi, Yoshitomo Osawa, Katsumi Muramatsu, Motoki Kato, Yoshikazu Takashima