Patents by Inventor Hiroo Okamoto

Hiroo Okamoto 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).

  • CONTENT TRANSMITTING DEVICE, CONTENT RECEIVING DEVICE AND CONTENT TRANSMITTING METHOD
    Publication number: 20100106960
    Abstract: Before content transmission, the content transmitting device and the content receiving device mutually authenticate each other to verify that the other device respects copyright and rightfully handles content, and then content is encrypted by shared key data and transmitted. It is arranged that in an authentication process, a time from transmission of an authentication request or a time from transmission of an authentication response until arrival of receipt acknowledgement data is measured and only when a measured time is less than a fixed upper-limit value, content is transmitted.
    Type: Application
    Filed: January 5, 2010
    Publication date: April 29, 2010
    Inventors: YOSHIMICHI KUDO, MANABU SASAMOTO, HIROO OKAMOTO
  • Information management apparatus
    Patent number: 7706541
    Abstract: An information management apparatus capable of reliable management of distributed information and an information providing system employing the same information management apparatus has a main information reproducing system for reproducing main information recorded in a given recording medium; and a reproduction management system for managing the main information reproducing system for reproducing the main information. A receiver is provided with a unit for recording distributed information and control information limiting the number of main information reproducing cycles on a recording medium, and a main information reproducing system provided with a reproduction disabling function for limiting the reproduction of main information.
    Type: Grant
    Filed: February 26, 2004
    Date of Patent: April 27, 2010
    Assignee: FIPA Frohwitter Intellectual Property AG
    Inventors: Hiroaki Ono, Kiyoshi Kano, Hideo Nishijima, Takao Arai, Takaharu Noguchi, Nobutaka Amada, Hiroo Okamoto, Hitoaki Owashi, Keizo Nishimura, Nobuyuki Kaku, Shinya Fujimori
  • CONTENT TRANSMITTING METHOD AND APPARATUS
    Publication number: 20100085965
    Abstract: A content transmitting method transmits content to a content receiving apparatus connected via a network. Copy control information on content to be transmitted is transmitted immediately before the content, controlled by the copy control information, via the same application layer session as a packet different from a packet including the content.
    Type: Application
    Filed: September 30, 2009
    Publication date: April 8, 2010
    Inventors: Hidetoshi TERAOKA, Hiroo Okamoto
  • Digital signal recording/reproducing apparatus
    Patent number: 7689100
    Abstract: A digital signal recording apparatus is disclosed, which is capable of protecting the copyright of the analog input information encoded into a first digital signal in a recording medium. A second digital signal encrypted based on the key information and the input analog signal encrypted based on the key information are converted into a second digital signal and encrypted, and the resulting signal is selectively recorded in a recording medium. The digital signal recording apparatus further comprises a circuit for encrypting the digital signal converted from the input analog signal with a key obtained by a predetermined calculation of the key information according to a scheme similar to the second digital signal protection scheme through a digital interface, and a signal recording circuit for recording the key information and the encrypted digital signal in a recording medium.
    Type: Grant
    Filed: August 30, 2004
    Date of Patent: March 30, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Manabu Sasamoto, Hiroo Okamoto, Toshifumi Takeuchi, Masaru Takahashi
  • COPY CONTROL METHOD
    Publication number: 20100027789
    Abstract: In a reception apparatus for receiving digital content and a plurality of types of copy control information for controlling copying of the digital content, and recording the digital content on a recording medium according to the plurality of types of copy control information, when first information in the received plurality of types of copy control information shows copy generation information permitting one-generation copying, the digital content is allowed to be recorded in a state of being copyable up to a limited number in the case where second information in the received plurality of types of copy control information shows limited-number copy permission, and the digital content is recorded only once in a copy prohibited state in the case where the second information does not show limited-number copy permission.
    Type: Application
    Filed: April 27, 2009
    Publication date: February 4, 2010
    Inventors: Sadao TSURUGA, Hiroo OKAMOTO
  • INPUT-OUTPUT CIRCUIT, RECORDING APPARATUS AND REPRODUCTION APPARATUS FOR DIGITAL VIDEO SIGNAL
    Publication number: 20100027962
    Abstract: A video signal input-output circuit and a recording-reproduction apparatus in which a digitally compressed video signal input in packet form can be recorded and reproduced efficiently and in stable fashion. In this apparatus, a clock reference is detected from a packet signal containing the clock reference and a digitally compressed video signal, a time stamp for a packet is generated using a clock signal in phase with the clock reference and added to the particular packet, and the packet signals with the time stamp added thereto are recorded closely to each other in a data storage element such as a magnetic recording medium. At playback, the packet interval is output by being restored to the original length on the basis of the time stamp added to the packet in store.
    Type: Application
    Filed: November 8, 2007
    Publication date: February 4, 2010
    Inventors: Hiroo OKAMOTO, Kyoichi Hosokawa, Hitoaki Owashi, Hiroaki Tachibana, Takaharu Noguchi
  • Recording medium and method for reproducing information therefrom
    Patent number: 7657158
    Abstract: A recording medium having recorded thereon, a plurality of picture information sets, presentation time values each of which is associated with the corresponding one of the picture information sets, picture information record marks each of which is associated with the corresponding one of said presentation time values, clip information specifying what position on the recording medium is associated with each of said presentation time values, and reproducing order specifying information specifying in what order the picture information sets are to be reproduced.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: February 2, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Naozumi Sugimura, Hiroo Okamoto, Junji Shiokawa
  • Editing Method and Recording and Reproducing Device
    Publication number: 20100014838
    Abstract: In order to provide a recording and reproducing device that allows a user to select and manage arbitrary play lists, a unit of management for managing all registered play list information and an upper management hierarchical level are added. The unit of management is adapted to be handled on the same level with unified information that indicates a reproduction range of all AV data. User-defined unified information is adapted to be handled on the added management hierarchical level. The user-defined unified information is formed to allow arbitrary reproduction ranges contained on a lower hierarchical level to be registered.
    Type: Application
    Filed: September 28, 2009
    Publication date: January 21, 2010
    Applicant: Hitachi, Ltd.
    Inventors: Susumu YOSHIDA, Junji SHIOKAWA, Hiroo OKAMOTO
  • Content transmitting device, content receiving device and content transmitting method
    Patent number: 7644265
    Abstract: Before content transmission, the content transmitting device and the content receiving device mutually authenticate each other to verify that the other device respects copyright and rightfully handles content, and then content is encrypted by shared key data and transmitted. It is arranged that in an authentication process, a time from transmission of an authentication request or a time from transmission of an authentication response until arrival of receipt acknowledgement data is measured and only when a measured time is less than a fixed upper-limit value, content is transmitted.
    Type: Grant
    Filed: February 4, 2004
    Date of Patent: January 5, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Yoshimichi Kudo, Manabu Sasamoto, Hiroo Okamoto
  • Recording medium and method for reproducing information therefrom
    Patent number: 7643729
    Abstract: A recording medium having recorded thereon, a plurality of picture information sets, presentation time values each of which is associated with the corresponding one of the picture information sets, picture information record marks each of which is associated with the corresponding one of said presentation time values, clip information specifying what position on the recording medium is associated with each of said presentation time values, and reproducing order specifying information specifying in what order the picture information sets are to be reproduced.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: January 5, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Naozumi Sugimura, Hiroo Okamoto, Junji Shiokawa
  • Video Information Outputting Apparatus, Video Information Receiving Apparatus, Video Information Outputting Method and Video Information Transmitting Method
    Publication number: 20090290851
    Abstract: According to a video information outputting apparatus, a video information receiving apparatus, a video information outputting method and a video information transmitting method, for receiving and outputting digital video information. The digital information is outputted in the same quality as it is, when it is certificated that an external apparatus operates according to a copy control information, while no information limited on copying thereof is outputted when it is not. It thereby prevents the information, which is outputted from the video information outputting apparatus to an external apparatus, from being used in other purposes than the original object thereof, thereby giving disadvantages onto the producer and/or copyright owner of the information.
    Type: Application
    Filed: August 5, 2009
    Publication date: November 26, 2009
    Applicant: Hitachi, Ltd.
    Inventors: Hiroo Okamoto, Nobuaki Kabuto, Hitoaki Owashi, Atsushi Yoshioka
  • Editing method and recording and reproducing device
    Patent number: 7613383
    Abstract: In order to provide a recording and reproducing device that allows a user to select and manage arbitrary play lists, a unit of management for managing all registered play list information and an upper management hierarchical level are added. The unit of management is adapted to be handled on the same level with unified information that indicates a reproduction range of all AV data. User-defined unified information is adapted to be handled on the added management hierarchical level. The user-defined unified information is formed to allow arbitrary reproduction ranges contained on a lower hierarchical level to be registered.
    Type: Grant
    Filed: August 11, 2005
    Date of Patent: November 3, 2009
    Assignee: Hitachi, Ltd.
    Inventors: Susumu Yoshida, Junji Shiokawa, Hiroo Okamoto
  • METHOD AND APPARATUS FOR RECEIVING A DIGITAL SIGNAL AND APPARATUS FOR RECORDING AND REPRODUCING THE DIGITAL SIGNAL
    Publication number: 20090252478
    Abstract: A method and apparatus is provided for receiving and/or reproducing a digital signal, capable of efficiently recording a compressed, packeted digital signal and inhibiting a copy thereof. An input packet signal is added with a time stamp indicating a relative time of an arrival of the packet, and the packet signals of digital information with the added time stamps are recorded at reduced intervals therebetween. In reproducing, a packet interval adjusting circuit restores the original packet intervals in accordance with the time stamps, and then a time stamp change circuit changes at least one bit of the time stamp and thereafter outputs the digital information.
    Type: Application
    Filed: March 10, 2009
    Publication date: October 8, 2009
    Inventors: Hitoaki Owashi, Hiroo Okamoto, Kyoichi Hosokawa, Takaharu Noguchi
  • Recording medium and method for reproducing information therefrom
    Patent number: 7599606
    Abstract: A recording medium having recorded thereon, a plurality of picture information sets, presentation time values each of which is associated with the corresponding one of the picture information sets, picture information record marks each of which is associated with the corresponding one of said presentation time values, clip information specifying what position on the recording medium is associated with each of said presentation time values, and reproducing order specifying information specifying in what order the picture information sets are to be reproduced.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: October 6, 2009
    Assignee: Hitachi, Ltd.
    Inventors: Naozumi Sugimura, Hiroo Okamoto, Junji Shiokawa
  • Video information outputting apparatus, video information receiving apparatus, video information outputting method and video information transmitting method
    Patent number: 7587126
    Abstract: According to a video information outputting apparatus, a video information receiving apparatus, a video information outputting method and a video information transmitting method, for receiving and outputting digital video information. The digital information is outputted in the same quality as it is, when it is certificated that an external apparatus operates according to a copy control information, while no information limited on copying thereof is outputted when it is not. It thereby prevents the information, which is outputted from the video information outputting apparatus to an external apparatus, from being used in other purposes than the original object thereof, thereby giving disadvantages onto the producer and/or copyright owner of the information.
    Type: Grant
    Filed: March 14, 2002
    Date of Patent: September 8, 2009
    Assignee: Hitachi, Ltd.
    Inventors: Hiroo Okamoto, Nobuaki Kabuto, Hitaoki Owashi, Atsushi Yoshioka
  • Still picture information recording medium and method and apparatus for reproducing still picture information therefrom
    Patent number: 7496280
    Abstract: A technique is provided for reproducing information from a recording medium, on which there are recorded a plurality of picture information sets; presentation time values, each associated with a corresponding one of the picture information sets; picture information record marks, each of which is associated with a corresponding one of the presentation time values; clip information specifying what position on the recording medium is associated with each of the presentation time values; and reproducing order specifying information which specifies in what order the picture information sets are to be reproduced.
    Type: Grant
    Filed: September 22, 2003
    Date of Patent: February 24, 2009
    Assignee: Hitachi, Ltd.
    Inventors: Naozumi Sugimura, Hiroo Okamoto, Junji Shiokawa
  • DIGITAL SIGNAL PROCESSING APPARATUS
    Publication number: 20090044269
    Abstract: If content is transmitted/received through a digital signal bus, protection of copyright causes a problem because of no deterioration in quality. Accordingly, authentication is required. The quantity of information to be processed is, however, so large that a long time is required for authentication. Accordingly, both achievement of handling property as in conventional analog connection and protection of copyrighted content without user's awareness become an object. The foregoing object can be achieved by authentication which is executed, for management of copyright, among apparatuses connected to the digital signal bus when the apparatuses are powered on or connected to the digital signal bus or when an input terminal connected to the digital signal bus is selected. The object can be further achieved by an encryption key shared among these apparatuses.
    Type: Application
    Filed: October 8, 2008
    Publication date: February 12, 2009
    Inventors: Seiichi SAITOH, Manabu Sasamoto, Hiroo Okamoto
  • Recording medium and method for reproducing information therefrom
    Patent number: 7483622
    Abstract: A recording medium having recorded thereon, a plurality of picture information sets, presentation time values each of which is associated with the corresponding one of the picture information sets, picture information record marks each of which is associated with the corresponding one of said presentation time values, clip information specifying what position on the recording medium is associated with each of said presentation time values, and reproducing order specifying information specifying in what order the picture information sets are to be reproduced.
    Type: Grant
    Filed: October 17, 2005
    Date of Patent: January 27, 2009
    Assignee: Hitachi, Ltd.
    Inventors: Naozumi Sugimura, Hiroo Okamoto, Junji Shiokawa
  • STILL PICTURE INFORMATION RECORDING MEDIUM AND METHOD AND APPARATUS FOR REPRODUCING STILL PICTURE INFORMATION THEREFROM
    Publication number: 20090022481
    Abstract: A technique is provided for reproducing information from a recording medium, on which there are recorded a plurality of picture information sets; presentation time values, each associated with a corresponding one of the picture information sets; picture information record marks, each of which is associated with a corresponding one of the presentation time values; clip information specifying what position on the recording medium is associated with each of the presentation time values; and reproducing order specifying information which specifies in what order the picture information sets are to be reproduced.
    Type: Application
    Filed: July 31, 2008
    Publication date: January 22, 2009
    Inventors: Naozumi SUGIMURA, Hiroo Okamoto, Junji Shiokawa
  • Input-output circuit, recording apparatus and reproduction apparatus for digital video signal
    Publication number: 20090003803
    Abstract: A video signal input-output circuit and a recording-reproduction apparatus in which a digitally compressed video signal input in packet form can be recorded and reproduced efficiently and in stable fashion. In this apparatus, a clock reference is detected from a packet signal containing the clock reference and a digitally compressed video signal, a time stamp for a packet is generated using a clock signal in phase with the clock reference and added to the particular packet, and the packet signals with the time stamp added thereto are recorded closely to each other in a data storage element such as a magnetic recording medium. At playback, the packet interval is output by being restored to the original length on the basis of the time stamp added to the packet in store.
    Type: Application
    Filed: July 18, 2008
    Publication date: January 1, 2009
    Inventors: Hiroo Okamoto, Kyoichi Hosokawa, Hitoaki Owashi, Hiroaki Tachibana, Takaharu Noguchi