Patents by Inventor Takeshi Asahi
Takeshi Asahi 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).
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Patent number: 9007527Abstract: An imaging device, an image system and an imaging method in which proper image correction processing is carried out on a video signal are provided. An imaging device includes: a video signal input unit which inputs a video signal; and an image processing unit to which the video signal is inputted and which carries out correction of the video signal and outputs a corrected video signal. The image processing unit includes a histogram detection unit which divides an image area termed by the acquired video signal into plural areas, acquires a per-area histogram that is a histogram or the video signal in each of the plural areas, and finds per-area histogram data for each area based on the per-area histogram. The image processing unit carries out correction of the video signal based on a cumulative value of the per-area histogram data.Type: GrantFiled: February 10, 2014Date of Patent: April 14, 2015Assignee: Hitachi, Ltd.Inventors: Masaki Ohtani, Shinichiro Hirooka, Makoto Asuka, Takeshi Asahi, Satoshi Nidaira
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Publication number: 20140253807Abstract: An imaging device, an image system and an imaging method in which proper image correction processing is carried out on a video signal are provided. An imaging device includes: a video signal input unit which inputs a video signal; and an image processing unit to which the video signal is inputted and which carries out correction of the video signal and outputs a corrected video signal. The image processing unit includes a histogram detection unit which divides an image area termed by the acquired video signal into plural areas, acquires a per-area histogram that is a histogram or the video signal in each of the plural areas, and finds per-area histogram data for each area based on the per-area histogram. The image processing unit carries out correction of the video signal based on a cumulative value of the per-area histogram data.Type: ApplicationFiled: February 10, 2014Publication date: September 11, 2014Applicant: Hitachi, Ltd.Inventors: Masaki Ohtani, Shinichiro Hirooka, Makoto Asuka, Takeshi Asahi, Satoshi Nidaira
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Patent number: 8823817Abstract: The present invention is based upon a camera management device coupled to a network camera via a network and the camera management device is provided with an image receiving unit that receives image data projected by the network camera and including control information for controlling the network camera from the network camera, a control information extracting unit that extracts the control information from the image data received by the image receiving unit and a control transmitting unit that transmits a control command according to the control information to the network camera via the network.Type: GrantFiled: August 5, 2011Date of Patent: September 2, 2014Assignee: Hitachi, Ltd.Inventors: Takeshi Asahi, Masuo Oku, Nagamasa Mizushima, Nobuhiro Yokoi
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Publication number: 20140033281Abstract: In a user authentication system which carries out authentication at a user terminal via a network, a password authentication page where permission of authentication is determined based on a consistency between an input password inputted from the user terminal and an authentication password includes: a private page URL key obtained by transforming a private page URL which the user terminal can connect via the network if it is determined that the authentication is permitted and an authentication password, using an encryption algorithm; and a URL recovery processing code to find the private page URL by transforming the private page URL key and the input password through inverse transformation of the encryption algorithm. If it is determined that the authentication is permitted, the private page URL is acquired using the URL recovery processing code.Type: ApplicationFiled: June 20, 2013Publication date: January 30, 2014Inventors: Takeshi ASAHI, Masayuki HIGASHI
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Publication number: 20120069202Abstract: The present invention is based upon a camera management device coupled to a network camera via a network and the camera management device is provided with an image receiving unit that receives image data projected by the network camera and including control information for controlling the network camera from the network camera, a control information extracting unit that extracts the control information from the image data received by the image receiving unit and a control transmitting unit that transmits a control command according to the control information to the network camera via the network.Type: ApplicationFiled: August 5, 2011Publication date: March 22, 2012Applicant: HITACHI, LTD.Inventors: Takeshi ASAHI, Masuo OKU, Nagamasa MIZUSHIMA, Nobuhiro YOKOI
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Publication number: 20090222798Abstract: A mobile device includes a memory for storing therein a subroutine management table to manage kinds of existing codes out of native code, first code and second code for a plurality of subroutines contained in content, a virtual machine, a precompile circuit for producing second code from first code and a subroutine management circuit for changing over processing in accordance with the kind of existing code for subroutine called up during execution of content. The subroutine management circuit judges kind of existing code with reference to the subroutine management table when the processing is changed over.Type: ApplicationFiled: December 11, 2008Publication date: September 3, 2009Inventors: Shinya IGUCHI, Takatoshi Kato, Masaya Umemura, Nobuaki Kohinata, Yasushi Nagai, Hiroshi Nakagoe, Keitaro Okasaki, Hirotaka Moribe, Takeshi Asahi
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Publication number: 20090216980Abstract: A storage media and a storage area of a storage apparatus are associated, and the storage media is used to manage the contents of the storage apparatus. A storage media for storing files is detachably mounted on an information processing apparatus, the information processing apparatus is connected to a storage apparatus via the Internet, the storage apparatus stores files corresponding to the files stored in the storage media, the storage media and the storage apparatus authenticate each other via the Internet, and the information processing apparatus reads files from or writes files into the storage media or the storage apparatus on the condition that the foregoing authentication is successful.Type: ApplicationFiled: May 15, 2008Publication date: August 27, 2009Inventors: Takeshi Asahi, Atsushi Ebata, Takahiro Nakano, Masaaki Iwasaki, Atsuo Kawaguchi, Naoko Iwami
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Publication number: 20090113087Abstract: There are provided a stream I/F section 7 adapted to exclusively input/output stream data such as video data or audio data from/to a host section, a non-stream I/F section 5 adapted to input/output non-stream data such as an address, a command, photo data, or text data from/to the host section 3, and a recording medium I/F section 11 adapted to input/output the stream data and the non-stream data to/from a recording medium section 4, and the stream I/F section 7 is provided with transfer control means for controlling the transfer rate of the stream data in accordance with a state of use (availability) of each of a receiving buffer 6 and a transmission buffer 8 provided independently.Type: ApplicationFiled: October 31, 2008Publication date: April 30, 2009Inventors: Nobuaki Kohinata, Yasushi Nagai, Takeshi Asahi, Shigeki Taira, Keitaro Okasaki, Yuichi Kobayashi
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Patent number: 7225340Abstract: The present invention provides a digital copying method for preventing complete copying by the use of digital copying. A data generating portion includes a storage device which generates a plurality of digital copies having mutually different amounts of effective information from original digital data, and stores the set of digital content having the digital copies encrypted different numbers of times in a memory. A digital output portion decrypts the set of digital content retrieved from the memory a prescribed number of times, making usable and outputting one of the digital copies in the set of digital content. An analog output portion extracts the digital copy that has been encrypted zero times from the set of digital content, converts that copy to analog data, and outputs that data.Type: GrantFiled: December 10, 2001Date of Patent: May 29, 2007Assignee: Hitachi, Ltd.Inventors: Takeshi Asahi, Jun Kitahara, Toru Owada
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Publication number: 20070106898Abstract: A setting information notifying method that enables safely and easily exchanging appliance setting information between appliances connected to a home network, the said method comprising steps of that: a portable data media is connected to a first appliance which provides a service in a communication network; the first appliance writes on the data media an appliance setting application which is used in notifying the appliance setting information to the other appliance, a host name of the first appliance, and a digital certification with a first cryptographic key; the data media is reconnected to a second appliance which uses the service of the first appliance; and the second appliance identifies a network address of the first appliance based on its host name, and establishes a cryptographic communication using the first cryptographic key over the communication network, and automatically sends the appliance setting information to the first appliance.Type: ApplicationFiled: May 2, 2006Publication date: May 10, 2007Inventors: Mika Mizutani, Yukiko Matsumoto, Takeshi Asahi
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Patent number: 7100055Abstract: A storage medium includes a storage device for storing information, information required for encryption and encrypted information, and an I/F device for inputting and outputting information, information required for coding and store encrypted information in a storage device or from an external apparatus other than the storage device, and an encoding device for coding of information and decoding of encoded information. When outputting information stored inside the storage device, information is encoded using encryption key information, and along with obtaining the encoded information and obtaining the encoded encryption key information by using another encryption key. Both the encoded information and encoded encryption key information are output so that decoding the information without the storage medium is impossible.Type: GrantFiled: September 4, 2001Date of Patent: August 29, 2006Assignee: Hitachi, Ltd.Inventors: Toru Owada, Jun Kitahara, Takeshi Asahi, Takayuki Tamura, Nagamasa Mizushima, Ikuya Kawasaki, Takashi Totsuka
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Patent number: 7082539Abstract: Since a conventional information processing apparatus includes a plurality of semiconductor devices, there is a problem that sensitive information may reside on a system bus in the apparatus or a semiconductor memory device serving as main memory therein. To obviate this problem, each information processing apparatus has a CPU which includes a microprocessor, a cryptographic processing algorithm ROM, a cryptographic processing hardware circuit, a RAM, a key custody area, and an external bus controller, which are all integrated on a single semiconductor chip. Thus, encryption/decryption processing is carried out only in the CPU, and internal operations of the CPU are made non-analyzable from an external signal of the CPU.Type: GrantFiled: March 6, 2000Date of Patent: July 25, 2006Assignee: Hitachi, Ltd.Inventors: Jun Kitahara, Takeshi Asahi, Toru Owada
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Patent number: 7054990Abstract: The external storage device according to the present invention which uses a non-volatile semiconductor memory such as a flash memory is provided with plural areas which store user data, and restricts access to the user data from a host computer and also dynamically changes an area an access to which is to be restricted. Accordingly, the ease of use of the external storage device for the host computer is improved. Specifically, the interior of the flash memory is divided into a normal area not protected by a password or the like and a protected area protected by a password or the like. A microprocessor controls accesses to the normal area and the protected area in accordance with a command from the host computer. In addition, the host computer can access the protected area after passing through authentication using a password. Moreover, the host computer changes information indicative of the location of the protected area, thereby dynamically changing the protection area.Type: GrantFiled: August 10, 2000Date of Patent: May 30, 2006Assignee: Renesas Technology Corp.Inventors: Takayuki Tamura, Jun Kitahara, Toru Owada, Shinichi Sawamura, Takeshi Asahi, Nagamasa Mizushima, Takashi Totsuka, Yasushi Akao
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Publication number: 20060072618Abstract: A communication apparatus capable of automatic recognition between remote communication apparatuses using a SSDP packet according to UPnP specification without changing the existing UPnP stack is disclosed. The communication apparatuses connected to communication networks each comprise a data receiver adapted to receive the data from the communication networks, a policy determining unit adapted to set the rule for determining the processing of the data received by the data receiver, a SSDP determining unit for determining the data processing with reference to the policy determining unit, a SSDP packet decapsulation unit adapted to process and decapsulate the encapsulated SSDP packet, a forwarding address list adapted to register the address of the remote communication apparatus, a SSDP packet encapsulation unit for processing and encapsulating the SSDP packet, and a remote apparatus information cache for storing the information of the remote communication apparatus.Type: ApplicationFiled: September 30, 2005Publication date: April 6, 2006Inventors: Hirotaka Moribe, Takeshi Asahi, Mika Mizutani
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Publication number: 20030097575Abstract: The present invention protects the right of a digital content, and enables final output of the digital content in a form of stimulating user's visual and auditory desire. An information processing apparatus main body transfers a digital content (display data) encrypted by using an encrypted key information shared with a display unit while the display unit performs a decryption process on the display data transferred from the information processing apparatus main body by using the encryption key information. Herein, the display data transferred from the information processing apparatus main body to the display unit is encrypted only in a part thereof, e.g. display data is encrypted in an amount of several lines every several lines.Type: ApplicationFiled: November 19, 2001Publication date: May 22, 2003Inventors: Toru Owada, Jun Kitahara, Takeshi Asahi
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Publication number: 20020114455Abstract: The present invention provides a digital copying method for preventing complete copying by the use of digital copying. A data generating portion includes a storage device which generates a plurality of digital copies having mutually different amounts of effective information from original digital data, and stores the set of digital content having the digital copies encrypted different numbers of times in a memory. A digital output portion decrypts the set of digital content retrieved from the memory a prescribed number of times, making usable and outputting one of the digital copies in the set of digital content. An analog output portion extracts the digital copy that has been encrypted zero times from the set of digital content, converts that copy to analog data, and outputs that data.Type: ApplicationFiled: December 10, 2001Publication date: August 22, 2002Applicant: Hitachi, Ltd.Inventors: Takeshi Asahi, Jun Kitahara, Toru Owada
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Publication number: 20020062445Abstract: Distribution of a digital content is made possible in a form stimulating user's visual and auditory desire while protecting the right of digital content A digital content distributing apparatus distributes to an information processing apparatus a digital content partly encrypted by using encryption key information shared with the information processing apparatus while the information processing apparatus performs a decryption process on an encrypted part of the digital content distributed from the digital content distributing apparatus by using the encryption key information. Herein, the digital content distributed from the digital content distributing apparatus is encrypted, in a part of the units as a subject of encryption with a formatting unit of the digital content in plaintext taken as one unit.Type: ApplicationFiled: November 16, 2001Publication date: May 23, 2002Inventors: Toru Owada, Jun Kitahara, Takeshi Asahi
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Publication number: 20020034306Abstract: A storage medium and an information processing system utilizing that storage medium capable of outputting information stored on the storage medium in a format unusable by other information devices or storage mediums. A storage medium and an information processing system utilizing that storage medium further capable of transferring information stored on the storage medium rather than copying the information so that the uniqueness of the information is assured. A storage medium comprised of a storage device for storing information, information required for encryption and encrypted information, and an I/F device for inputting and outputting information, information required for coding and store encrypted information in a storage device or from an external apparatus other than the storage device, and an encoding device for coding of information and decoding of encoded information.Type: ApplicationFiled: September 4, 2001Publication date: March 21, 2002Inventors: Toru Owada, Jun Kitahara, Takeshi Asahi, Takayuki Tamura, Nagamasa Mizushima, Ikuya Kawaski, Takashi Totsuka