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).

  • Contents transmitter apparatus, contents reciever apparatus and contents transmitting method
    Publication number: 20050210290
    Abstract: For achieving the protection of copyright, by suppressing illegal copy production thereof, in particular, when transmitting contents with using a wired or wireless LAN, as well as, for preventing the transmission of contents from deviating from a range of a personal use thereof, a contents transmitter apparatus and a contents receiver apparatus make an authentication, mutually, before transmitting contents therebetween.
    Type: Application
    Filed: May 17, 2004
    Publication date: September 22, 2005
    Inventors: Chiyo Ono, Hiroo Okamoto
  • Digital signal recording devices, digital signal recording/playback devices, and digital signal receiving/recording/playback devices
    Publication number: 20050185934
    Abstract: A digital signal recording device or a digital signal recording and playback device which receives an inputted digital signal having a predetermined packet format and including a digital video signal and a digital audio signal. The device also receives an inputted analog video signal and an inputted analog audio signal, converts the analog video signal and the analog audio signal to a digital video signal and a digital audio signal, compresses the digital video signal and the digital audio signal and multiplexes the compressed digital video signal and the compressed digital audio signal to produce a multiplexed digital signal having the selected one of the inputted digital signal and the multiplexed digital signal as a digital recording signal, and records the digital recording signal to produce a recorded digital signal.
    Type: Application
    Filed: April 21, 2005
    Publication date: August 25, 2005
    Inventors: Yuji Hatanaka, Hiroo Okamoto
  • Content transmission apparatus and content reception apparatus
    Publication number: 20050160274
    Abstract: It is an object of the present invention to protect a copyright of a content by suppressing creation of illegal copies of the content and prevent a content from being transmitted beyond a range of personal use in a process to transmit the content through a wire or wireless LAN. Before transmitting a content from a content transmission apparatus to a content reception apparatus, the content transmission apparatus and the content reception apparatus authenticate each other. In the authentication, a timer measures a time interval between a transmission of an authentication request and a reception of an acknowledgement of a reception of the request or between a transmission of a response to a received authentication request and a reception of an acknowledgement of a reception of the response.
    Type: Application
    Filed: May 17, 2004
    Publication date: July 21, 2005
    Inventors: Takanori Yukimatsu, Hiroo Okamoto, Yoshimichi Kudo
  • Content transmission apparatus, content reception apparatus and content transmission method
    Publication number: 20050160265
    Abstract: A copyright of a content is protected by preventing creation of illegal copies of the content and the content is prevented from being transmitted beyond a range of personal use in a process to transmit the content through a LAN. Before transmission of a content, a content transmission apparatus and a content reception apparatus perform a determination of authentication information available in a predetermined command accompanying authentication information, or an authentication determination based on a time until reception of a response to a predetermined command request accompanying predetermined authentication information. If the authentication is unsuccessful, the requested content is not transmitted to the content reception apparatus. With such arrangement, it is possible to effectively protect a copyright when a content is transmitted by way of a network.
    Type: Application
    Filed: May 17, 2004
    Publication date: July 21, 2005
    Inventors: Mayuko Tanaka, Hiroo Okamoto, Yoshimichi Kudo
  • Digital signal recording devices, digital signal recording/playback devices, and digital signal receiving/recording/playback devices
    Patent number: 6920279
    Abstract: A digital signal recording device or a digital signal recording and playback device which receives an inputted digital signal having a predetermined packet format and including a digital video signal and a digital audio signal. The device also receives an inputted analog video signal and an inputted analog audio signal, converts the analog video signal and the analog audio signal to a digital video signal and a digital audio signal, compresses the digital video signal and the digital audio signal, and multiplexes the compressed digital video signal and the compressed digital audio signal to produce a multiplexed digital signal having the predetermined packet format. The device outputs a selected one of the inputted digital signal and the multiplexed digital signal as a digital recording signal, and records the digital recording signal to produce a recorded digital signal.
    Type: Grant
    Filed: May 28, 2002
    Date of Patent: July 19, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Yuji Hatanaka, Hiroo Okamoto
  • Digital signal processing apparatus
    Publication number: 20050089167
    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: November 1, 2004
    Publication date: April 28, 2005
    Inventors: Seiichi Saitoh, Manabu Sasamoto, Hiroo Okamoto
  • Digital information recording-reproducing apparatus
    Publication number: 20050025464
    Abstract: A digital information recording-reproducing apparatus for recording a digital information signal which includes a recording circuit for recording the digital information signal together with control information, and a reproducing circuit for detecting the recorded control information at a time the recorded digital information signal is to be reproduced, and reproducing the recorded digital information signal only if the detected control information satisfies a predetermined condition.
    Type: Application
    Filed: August 31, 2004
    Publication date: February 3, 2005
    Applicant: Hitachi, Ltd.
    Inventors: Nobutaka Amada, Takao Arai, Takaharu Noguchi, Hiroo Okamoto, Shigeru Yamazaki
  • Digital signal recording/reproducing apparatus
    Publication number: 20050025458
    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: Application
    Filed: August 30, 2004
    Publication date: February 3, 2005
    Inventors: Manabu Sasamoto, Hiroo Okamoto, Toshifumi Takeuchi, Masaru Takahashi
  • Digital signal processing apparatus
    Patent number: 6839851
    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: Grant
    Filed: July 28, 1999
    Date of Patent: January 4, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Seiichi Saitoh, Manabu Sasamoto, Hiroo Okamoto
  • Content transmitting device, content receiving device and content transmitting method
    Publication number: 20040268131
    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: February 4, 2004
    Publication date: December 30, 2004
    Inventors: Yoshimichi Kudo, Manabu Sasamoto, Hiroo Okamoto
  • Recording medium and method for reproducing information therefrom
    Publication number: 20040252974
    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: September 22, 2003
    Publication date: December 16, 2004
    Inventors: Naozumi Sugimura, Hiroo Okamoto, Junji Shiokawa
  • Digital information recording-reproducing apparatus
    Patent number: 6807364
    Abstract: A digital information recording-reproducing apparatus for recording and reproducing a digital information signal which includes a recording circuit for recording the digital information signal together with control information, and a reproducing circuit for detecting the recorded control information at a time the recorded digital information signal is to be reproduced, and reproducing the recorded digital information signal only if the detected control information satisfies a predetermined condition.
    Type: Grant
    Filed: June 19, 2001
    Date of Patent: October 19, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Nobutaka Amada, Takao Arai, Takaharu Noguchi, Hiroo Okamoto, Shigeru Yamazaki
  • Digital signal recording/reproducing apparatus
    Patent number: 6804453
    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: May 15, 2000
    Date of Patent: October 12, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Manabu Sasamoto, Hiroo Okamoto, Toshifumi Takeuchi, Masaru Takahashi
  • Method and apparatus for receiving a digital signal and apparatus for recording and reproducing the digital signal
    Publication number: 20040190857
    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: February 23, 2004
    Publication date: September 30, 2004
    Inventors: Hitoaki Owashi, Hiroo Okamoto, Kyoichi Hosokawa, Takaharu Noguchi
  • Information management apparatus
    Publication number: 20040165301
    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: Application
    Filed: February 26, 2004
    Publication date: August 26, 2004
    Inventors: Hiroaki Ono, Kiyoshi Kano, Hideo Nishijima, Takao Arai, Takaharu Noguchi, Nobutaka Amada, Hiroo Okamoto, Hitoaki Owaski, Keizo Nishimura, Nobuyuki Kaku, Shinya Fujimori
  • Image recording and reproducing apparatus
    Publication number: 20040165866
    Abstract: An image recording and reproducing apparatus can record and reproduce both of a digital signal and an analog signal. Operations of a broadcast receiving apparatus and a recording and reproducing apparatus are integrated and superimposition of information on an analog image is realized during recording and reproduction of a digital signal. The broadcast receiving apparatus and the recording and reproducing apparatus communicate with each other to be able to set and obtain states of the opposite apparatus, so that one of the apparatus notifies information of the other apparatus to a user and causes the user to set the information in a picture having the same form as a picture used to notify a state of one apparatus to the user and to cause the user to set the state.
    Type: Application
    Filed: February 27, 2004
    Publication date: August 26, 2004
    Inventors: Yasunori Ohara, Akira Saitou, Takeo Ohkouchi, Hiroo Okamoto, Nobutaka Amada
  • Recording apparatus and reproducing apparatus
    Patent number: 6771893
    Abstract: For achieving a recording apparatus and a reproducing apparatus enabling to function an interface of digital signals even when recording and reproducing analog signals, wherein the analog signal reproduced in an analog signal recording/reproducing circuit is converted into the digital signal in an encoder so as to be outputted from an interface circuit when reproducing the analog signal, while the digital signal inputted from the interface circuit is converted in a decoder into the analog signal to be recorded when recording the analog signal. Further, it comprises a digital signal recording/reproducing circuit for recording/reproducing a first digital signal into a recording medium, a converter for converting between the first digital signal and a second digital signal, and an interface circuit for inputting/outputting the second digital signal.
    Type: Grant
    Filed: September 20, 1999
    Date of Patent: August 3, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Hiroo Okamoto, Hideo Nishijima, Nobuaki Maejima
  • Image recording and reproducing apparatus
    Patent number: 6763174
    Abstract: An image recording and reproducing apparatus can record and reproduce both a digital signal and an analog signal. Operations of a broadcast receiving apparatus and a recording and reproducing apparatus are integrated, and superimposition of information on an analog image is realized during recording and reproduction of a digital signal. The broadcast receiving apparatus and the recording and reproducing apparatus communicate with each other to be able to set and obtain states of the opposite apparatus, so that one of the apparatus notifies information of the other apparatus to a user, and causes the user to set the information in a picture having the same form as a picture used to notify a state of one apparatus to the user, and causes the user to set the state.
    Type: Grant
    Filed: July 16, 2001
    Date of Patent: July 13, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Yasunori Ohara, Akira Saitou, Takeo Ohkouchi, Hiroo Okamoto, Nobutaka Amada
  • Receiving apparatus, printer and printing control method for digital image information
    Publication number: 20040133922
    Abstract: In an apparatus and a method for enabling control on print permission, without applying new control information or a protection method, copy control information is detected, which is added to digital information, when controlling the printing of digital information, thereby controlling on whether the printing can be conducted on the digital information depending upon the copy control information detected.
    Type: Application
    Filed: November 26, 2003
    Publication date: July 8, 2004
    Inventors: Hiroo Okamoto, Hitoaki Owashi, Satoshi Sano, Hiroyuki Koreeda, Kenji Katsumata
  • Method and apparatus for receiving a digital signal and apparatus for recording and reproducing the digital signal
    Patent number: 6757478
    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: Grant
    Filed: June 29, 2001
    Date of Patent: June 29, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Hitoaki Owashi, Hiroo Okamoto, Kyoichi Hosokawa, Takaharu Noguchi