Patents by Inventor Yuusaku Ohta
Yuusaku Ohta 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: 9832279Abstract: A plurality of networks each having a host are connected to achieve a transparent transaction between devices belonging to the different networks. A target apparatus includes a station and a host. In response to a get device handle request from an initiator apparatus, the station acquires, from the host, configuration information of a target device and relays transactions between the initiator apparatus and the target device, without requiring involvement of the host.Type: GrantFiled: March 9, 2012Date of Patent: November 28, 2017Assignee: PANASONIC CORPORATIONInventors: Shinichiro Nishioka, Yuusaku Ohta, Kozo Nishimura
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Patent number: 9379974Abstract: To achieve efficient data transfer between a first network and a second network, and, in particular, to reduce processing load pertaining to address conversion, a transfer control device in the first network acquires an address of a transfer target device in the second network, and assigns the acquired address to a transfer device in the first network. When data transmitted through the first network is to be transferred to the transfer target device via the transfer device, there is no need to perform address conversion as the transfer device and the transfer target device are assigned the same address.Type: GrantFiled: January 27, 2012Date of Patent: June 28, 2016Assignee: PANASONIC CORPORATIONInventors: Yuusaku Ohta, Shinichiro Nishioka
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Patent number: 9319275Abstract: An objective of the present invention is to determine a function of each communication apparatus with few steps. A first communication apparatus (100) is capable of carrying out at least one of a function of an apparatus which receives an access thereto from a second communication apparatus (200), and a function of a host which accesses the second communication apparatus (200). The first communication apparatus (100) comprises: an access request issuing unit (140) which issues a request which denotes the function thereof to the second communication apparatus (200); and a conflict assessment unit (150) which, either when the request and a request which the second communication apparatus (200) has issued conflict or when the request is rejected, makes the access request issuing unit (140) reissue a request to the second communication apparatus (200) which denotes another function.Type: GrantFiled: April 27, 2012Date of Patent: April 19, 2016Assignee: PANASONIC CORPORATIONInventors: Satoshi Senga, Yuusaku Ohta, Shinichiro Nishioka
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Patent number: 9043427Abstract: The present invention performs efficient data transfer between devices. In particular, the present invention can reduce processing loads and power consumption of a response device and increase overall throughput. When a request device issues a direct transfer request to directly transfer data to or from a data storage unit included in the response device, the response device performs control so that data is directly transferred between a communication unit and the data storage unit. The request device is allowed to transparently and directly access the data storage unit included in the response device via the communication unit between the request device and the response device.Type: GrantFiled: June 20, 2011Date of Patent: May 26, 2015Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventor: Yuusaku Ohta
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Patent number: 8996913Abstract: The data transfer control device of the present invention is capable of improving data transfer efficiency while discarding error data, a DMA parameter storing control unit (1112) temporarily stores parameters to a store resource; a data processing unit (1201) performs error detection processing for data that is transferred; a DMA parameter return control unit (1122) causes parameters used at transfer time of data for which the processing result in the error detection processing was an error to be returned as parameters for subsequent data transfer use from the store resource; and a completion notification delay control unit (1121), with regard to the parameters, causes the completion notification to a host system that indicates that data transfer has completed normally for each of the parameters to wait for normal completion of data transfer that uses parameters that had been set earlier than each of the first-mentioned parameters.Type: GrantFiled: July 13, 2011Date of Patent: March 31, 2015Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Masaaki Harada, Yuusaku Ohta, Satoru Kuriki, Satomi Amano, Hideki Taniguchi
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Patent number: 8959261Abstract: A data transfer control device 1061 includes a read pointer update unit 5004 updating a value of a global read pointer RPg with a value of a local read pointer (first local read pointer) RPl1 held by a local read pointer hold unit 5007 when completion of data transfer is recognized and a position, in an order of reading descriptors, of a descriptor D3010a indicated by the local read pointer RPl1 is earlier than positions of descriptors D3010b and D3010c respectively indicated by local read pointers (second local read pointers) RPl2 and RPl3 held by the other data transfer control devices 1062 and 1063.Type: GrantFiled: January 25, 2011Date of Patent: February 17, 2015Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Yuusaku Ohta, Masaaki Harada, Satoru Kuriki, Satomi Amano, Hideki Taniguchi
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Publication number: 20140082163Abstract: An objective of the present invention is to determine a function of each communication apparatus with few steps. A first communication apparatus (100) is capable of carrying out at least one of a function of an apparatus which receives an access thereto from a second communication apparatus (200), and a function of a host which accesses the second communication apparatus (200). The first communication apparatus (100) comprises: an access request issuing unit (140) which issues a request which denotes the function thereof to the second communication apparatus (200); and a conflict assessment unit (150) which, either when the request and a request which the second communication apparatus (200) has issued conflict or when the request is rejected, makes the access request issuing unit (140) reissue a request to the second communication apparatus (200) which denotes another function.Type: ApplicationFiled: April 27, 2012Publication date: March 20, 2014Applicant: PANASONIC CORPORATIONInventors: Satoshi Senga, Yuusaku Ohta, Shinichiro Nishioka
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Publication number: 20130332504Abstract: A plurality of networks each having a host are connected to achieve a transparent transaction between devices belonging to the different networks. A target apparatus includes a station and a host. In response to a get device handle request from an initiator apparatus, the station acquires, from the host, configuration information of a target device and relays transactions between the initiator apparatus and the target device, without requiring involvement of the host.Type: ApplicationFiled: March 9, 2012Publication date: December 12, 2013Inventors: Shinichiro Nishioka, Yuusaku Ohta, Kozo Nishimura
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Publication number: 20130315250Abstract: To achieve efficient data transfer between a first network 1 and a second network 2, and, in particular, to reduce processing load pertaining to address conversion, a transfer control device 110 in the first network 1 acquires an address of a transfer target device 240 in the second network 2, and assigns the acquired address to a transfer device 140 in the first network. When data transmitted through the first network 1 is to be transferred to the transfer target device 240 via the transfer device 140, there is no need to perform address conversion as the transfer device 140 and the transfer target device 240 are assigned the same address.Type: ApplicationFiled: January 27, 2012Publication date: November 28, 2013Inventors: Yuusaku Ohta, Shinichiro Nishioka
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Publication number: 20130124929Abstract: The data transfer control device of the present invention is capable of improving data transfer efficiency while discarding error data, a DMA parameter storing control unit (1112) temporarily stores parameters to a store resource; a data processing unit (1201) performs error detection processing for data that is transferred; a DMA parameter return control unit (1122) causes parameters used at transfer time of data for which the processing result in the error detection processing was an error to be returned as parameters for subsequent data transfer use from the store resource; and a completion notification delay control unit (1121), with regard to the parameters, causes the completion notification to a host system that indicates that data transfer has completed normally for each of the parameters to wait for normal completion of data transfer that uses parameters that had been set earlier than each of the first-mentioned parameters.Type: ApplicationFiled: July 13, 2011Publication date: May 16, 2013Applicant: PANASONIC CORPORATIONInventors: Masaaki Harada, Yuusaku Ohta, Satoru Kuriki, Satomi Amano, Hideki Taniguchi
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Publication number: 20120265839Abstract: The present invention performs efficient data transfer between devices. In particular, the present invention can reduce processing loads and power consumption of a response device 2 and increase overall throughput. When a request device 1 issues a direct transfer request to directly transfer data to or from a data storage unit 24 included in the response device 2, the response device 2 performs control so that data is directly transferred between a communication unit 23 and the data storage unit 24. The request device 1 is allowed to transparently and directly access the data storage unit 24 included in the response device 2 via the communication unit 24 between the request device 1 and the response device 2.Type: ApplicationFiled: June 20, 2011Publication date: October 18, 2012Inventor: Yuusaku Ohta
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Publication number: 20120233372Abstract: A data transfer control device 1061 includes a read pointer update unit 5004 updating a value of a global read pointer RPg with a value of a local read pointer (first local read pointer) RP11 held by a local read pointer hold unit 5007 when completion of data transfer is recognized and a position, in an order of reading descriptors, of a descriptor D3010a indicated by the local read pointer RP11 is earlier than positions of descriptors D3010b and D3010c respectively indicated by local read pointers (second local read pointers) RP12 and RP13 held by the other data transfer control devices 1062 and 1063.Type: ApplicationFiled: January 25, 2011Publication date: September 13, 2012Inventors: Yuusaku Ohta, Masaaki Harada, Satoru Kuriki, Satomi Amano, Hideki Taniguchi
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Patent number: 8265273Abstract: An encryption circuit is provided which generates encrypted text from plain text using a key. The encryption circuit includes a randomized 8-bit inverse element calculation circuit which receives randomized input data that is obtained by adding, to input data on which predetermined processing is performed with the key, a predetermined input mask value determined depending on a random number, and which generates randomized output data that is obtained by adding, to an inverse element of the input data, an output mask value that is an inverse element of the input mask value, wherein the encryption circuit generates the encrypted text from the generated randomized output data.Type: GrantFiled: May 26, 2008Date of Patent: September 11, 2012Assignee: Panasonic CorporationInventors: Kaoru Yokota, Yuusaku Ohta
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Patent number: 7958240Abstract: In a server, an echo-request transmitting unit transmits echo-request data to a target device, and an echo-reply receiving unit receives echo-reply data from the target device. A time measuring unit measures, as the target time, the time required between transmission of the echo-request data and reception of the echo-reply data, and compares the target time with the reference time. In this way, the server judges whether the target device connected to its network belongs to a predetermined group.Type: GrantFiled: November 6, 2008Date of Patent: June 7, 2011Assignee: Panasonic CorporationInventors: Yuichi Futa, Hiroki Yamauchi, Yuusaku Ohta, Natsume Matsuzaki
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Patent number: 7925697Abstract: In a server, an echo-request transmitting unit 204 transmits echo-request data to a target device, and an echo-reply receiving unit 205 receives echo-reply data from the target device. A time measuring unit 206 measures, as the target time, the time required between transmission of the echo-request data and reception of the echo-reply data, and compares the target time with the reference time. In this way, the server judges whether the target device connected to its network belongs to a predetermined group.Type: GrantFiled: September 25, 2003Date of Patent: April 12, 2011Assignee: Panasonic CorporationInventors: Yuichi Futa, Hiroki Yamauchi, Yuusaku Ohta, Natsume Matsuzaki
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Patent number: 7752433Abstract: A content management system formed from a playback apparatus that requests and plays content, and a content management apparatus that manages duplication and deletion of content. The playback apparatus notifies group information of the playback apparatus to the content management apparatus, acquires information from the content management apparatus showing whether requests are permitted, and duplicates/deletes content. By judging whether the playback apparatus belongs to a group, and notifying whether a duplication request is permitted or rejected, based on in-group and out-group remaining numbers that show the remaining number of duplications permitted of apparatuses in-group and out-group, respectively, the content management apparatus relaxes restrictions on in-group content duplication as compared with out-group content duplication, and thus improves convenience for users in a home network, while protecting the rights of copyright holders, with respect to content duplication and usage.Type: GrantFiled: August 28, 2003Date of Patent: July 6, 2010Assignee: Panasonic CorporationInventors: Hiroki Yamauchi, Yuusaku Ohta, Masaya Miyazaki, Natsume Matsuzaki, Toshihisa Abe
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Publication number: 20100086126Abstract: There has been a problem that the maximum number of logical steps increases and processing speed decreases when a masking method in which S-Box is implemented using an inverse element calculation in a composite field as a countermeasure for power analysis attack on an AES cipher. An encryption device (1) which generates encrypted text from plain text using a key, the encryption device (1) includes a randomized 8-bit inverse element calculation unit (101) which receives randomized input data that is obtained by adding, to input data on which predetermined processing is performed with the key, a predetermined input mask value determined depending on a random number, and which generates randomized output data that is obtained by adding, to an inverse element of the input data, an output mask value that is an inverse element of the input mask value, wherein the encryption device generates the encrypted text from the generated randomized output data.Type: ApplicationFiled: May 26, 2008Publication date: April 8, 2010Inventors: Kaoru Yokota, Yuusaku Ohta
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Patent number: 7539306Abstract: A key delivery apparatus that prevents improper use of contents, and manages a decryption key for decrypting encrypted content and a suppliable number showing how many times the decryption key is suppliable, with respect to one or more terminal apparatuses connected to a network. The key delivery apparatus receives a supply request for the decryption key from a terminal apparatus, and if the terminal apparatus is a legitimate supply target, judges whether the terminal apparatus is a first-type that manages a content-usage period or a second-type that does not manage the content-usage period, and if the suppliable number has a remaining number, supplies to the terminal apparatus, the decryption key and a key-usage period of the decryption key when judged that the terminal apparatus is the first-type and the decryption key when judged that the terminal apparatus is the second-type.Type: GrantFiled: August 28, 2003Date of Patent: May 26, 2009Assignee: Panasonic CorporationInventors: Yuusaku Ohta, Hiroki Yamauchi, Masaya Miyazaki, Natsume Matsuzaki, Toshihisa Abe
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Publication number: 20090070483Abstract: In a server, an echo-request transmitting unit 204 transmits echo-request data to a target device, and an echo-reply receiving unit 205 receives echo-reply data from the target device. A time measuring unit 206 measures, as the target time, the time required between transmission of the echo-request data and reception of the echo-reply data, and compares the target time with the reference time. In this way, the server judges whether the target device connected to its network belongs to a predetermined group.Type: ApplicationFiled: November 6, 2008Publication date: March 12, 2009Inventors: Yuichi FUTA, Hiroki Yamauchi, Yuusaku Ohta, Natsume Matsuzaki
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Patent number: 7487351Abstract: The conventional method of limiting the number of receiving apparatus has a problem that if the limited number of appliances is reduced to limit distribution to unspecified appliances outside a home, distribution to appliances in the home is limited unnecessarily. If the limited number of appliances is increased, distribution to appliances outside the home cannot be sufficiently limited. The invention provides at least one receiving apparatus, (e.g., digital television sets and PCs,) connected to a network and capable of receiving and using predetermined data, and a transmitting apparatus, (e.g., an AV server) for transmitting the data to the receiving apparatus via the network. Use of the data on the network is managed based on the transmission time required for transmission of predetermined information between the transmitting apparatus and the receiving apparatus.Type: GrantFiled: March 22, 2004Date of Patent: February 3, 2009Assignee: Panasonic CorporationInventors: Yasushi Ayaki, Naoshi Usuki, Yoshihiro Morioka, Natsume Matsuzaki, Yuusaku Ohta