Patents by Inventor Hiroyuki Iitsuka
Hiroyuki Iitsuka 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: 8510844Abstract: In a system which attaches update information required to create a content key used for content encryption/decryption to encrypted content and transmits the encrypted content, there is used an authorized content verification method including a verification request step of, by a receiver, transmitting an authorization verification request including update information received from a transmitter, an update information check step of, by the transmitter, checking whether the update information included in the received authorization verification request is predetermined update information, a message-of-acceptance transmission step of creating a message of acceptance using the update information and an exchange key shared between the transmitter and the receiver and transmitting the message of acceptance if the update information matches the predetermined update information, and an authorized content determination step of, by the receiver, determining that content is authorized content on the basis of reception ofType: GrantFiled: October 12, 2005Date of Patent: August 13, 2013Assignee: Panasonic CorporationInventors: Ayako Takatsuji, Hiroyuki Iitsuka, Naoshi Usuki
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Patent number: 8510421Abstract: A system including a server holding content and a terminal using the content, whereby the terminal is registered in the server if a communication time between the terminal and the server is less than or equal to a reference value. A measuring unit of the server measures a communication time from transmitting measuring information to the terminal until receiving response information from the terminal, and repeats the transmission, the reception, and the measurement until the measured communication time is less than or equal to the reference value. An elapsed-time measuring unit measures an elapsed time from when the measuring unit first begins measuring the communication time, and a transmission unit transmits, to the terminal, status notification information showing a processing status depending on the elapsed time. A response unit of the terminal receives measuring information from the server and transmits response information to the server when the measuring information is received.Type: GrantFiled: January 6, 2005Date of Patent: August 13, 2013Assignee: Panasonic CorporationInventors: Natsume Matsuzaki, Naoshi Usuki, Hiroyuki Iitsuka, Hiroki Yamauchi
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Patent number: 8341701Abstract: The conventional data transmitting/receiving system has problems: that a correct measurement cannot be performed because a measurement result is an addition of a verification processing time and a transmission time; that an authentication processing which is necessary for a transmission time measurement processing needs to be separately required; and that an unnecessary key exchange processing is executed.Type: GrantFiled: September 6, 2005Date of Patent: December 25, 2012Assignee: Panasonic CorporationInventors: Yasushi Ayaki, Hiroyuki Iitsuka, Naoshi Usuki
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Publication number: 20100169524Abstract: Detecting an input source of a signal of a device connected to a bus and determining whether the signal is converted, extracted, multiplexed, or processed. Efficiently controlling the connection of each unit connected on the bus. Issuing a command for detecting the output plug or source plug as the signal source. The unit or subunit receiving this command shows the signal source. Obtaining information showing whether a subunit is present in the unit or not.Type: ApplicationFiled: January 6, 2010Publication date: July 1, 2010Applicant: Panasonic CorporationInventors: Masazumi Yamada, Hiroyuki Iitsuka
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Patent number: 7747016Abstract: A data transmitting and receiving method for improving transmission and reception efficiency can be obtained by improving the security through update of a control key and reduction of the frequency of the authentication and key exchange process. An STB 1 transmits encrypted digital data Kw (D) obtained by encrypting digital data D using a work key Kw, and an encrypted work key Kc (Kw) obtained by encrypting the Kw using a control key Kc. The Kc is periodically or non-periodically updated, and an identifier L identifying the Kc is assigned to each Kc. A VTR device 2 decrypts the received Kc (Kw) using the Kc obtained by performing the authentication and key exchange process with the STB 1, decrypts the Kw (D) received using the Kw to obtain the D. It is determined whether or not the Kc has been updated while the reception process is suspended by referring to the transmitted L when the reception process is suspended and then resumed.Type: GrantFiled: September 3, 2003Date of Patent: June 29, 2010Assignee: Panasonic CorporationInventors: Takuya Nishimura, Hiroyuki Iitsuka, Masazumi Yamada, Shoichi Gotoh, Hideaki Takechi
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Patent number: 7725916Abstract: A signal switching device including an interface having a video signal communicating unit, a DDC and an HPD, controlling connected device, or being controlled by connected device. A switcher (2) includes a switch (30) selecting video signal input, a DDC (26c) reading information from output destination device, a microcomputer (33) reading information indicating a physical address of switcher (2) and a status of the output destination device through DDC (26c), and a DDC (22a) and a DDC (22b) outputting information to a plurality of input source devices. The microcomputer (33) stores the physical address of the switcher (2) and above-mentioned information into an EDID memory (32) and reads the above-mentioned information out of the EDID memory (32) and outputs through the DDC (22a) and the DDC (22b).Type: GrantFiled: July 12, 2004Date of Patent: May 25, 2010Assignee: Panasonic CorporationInventors: Masazumi Yamada, Hiroyuki Iitsuka
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Patent number: 7668993Abstract: Detecting an input source of a signal of a device connected to a bus and determining whether the signal is converted, extracted, multiplexed, or processed. Efficiently controlling the connection of each unit connected on the bus. Issuing a command for detecting the output plug or source plug as the signal source. The unit or subunit receiving this command shows the signal source. Obtaining information showing whether a subunit is present in the unit or not.Type: GrantFiled: July 4, 2000Date of Patent: February 23, 2010Assignee: Panasonic CorporationInventors: Masazumi Yamada, Hiroyuki Iitsuka
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Publication number: 20090136207Abstract: The AV data transmitting apparatus according to the present invention is an AV data transmitting apparatus which transmits AV data to an other apparatus, and includes: a recording unit that records AV data; an AV data transmitting unit which transmits, to the other apparatus, the AV data recorded by the recording unit; a notification receiving unit that receives, from the other apparatus, a success notification indicating that the recording of the AD data has succeeded; a control unit that performs processing to delete or invalidate the AV data recorded by the recording unit in the case where the success notification is received by the notification receiving unit; and a response transmitting unit that transmits, to the other apparatus, a notification response indicating a result of the processing performed by the control unit.Type: ApplicationFiled: August 28, 2006Publication date: May 28, 2009Inventors: Yasushi Ayaki, Takumi Tanabe, Takuya Nishimura, Hiroyuki Iitsuka
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Publication number: 20090132705Abstract: A device registration system including a server which holds content and a terminal apparatus which uses content, whereby the terminal apparatus is registered in the server if a communication time between the terminal apparatus and the server is less than or equal to a reference value. A measuring unit of the server measures the communication time, being a time period from transmitting measuring information to the terminal apparatus until receiving response information from the terminal apparatus, and repeats the transmission, the reception, and the measurement until the measured communication time is less than or equal to the reference value. An elapsed-time measuring unit measures an elapsed time from when the measuring unit first begins measuring the communication time, and a transmission unit transmits, to the terminal apparatus, status notification information showing a processing status which depends on the elapsed time.Type: ApplicationFiled: January 6, 2005Publication date: May 21, 2009Inventors: Natsume Matsuzaki, Naoshi Usuki, Hiroyuki Iitsuka, Hiroki Yamauchi
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Publication number: 20090119719Abstract: A device registration system for registering a terminal device for obtaining and using contents in a server that stores contents. The server stores a contents list indicating contents stored and a registration list for registering specific information to the terminal device. The server receives the specific information and transmits the contents list to the terminal device. The terminal device receives a selection of a content from the contents list according to input by a user and requests the server to transmit the selected content. When the specific information to the terminal device of the request source is not registered in the registration list, the server performs a registration process and transmits the requested content to the terminal device.Type: ApplicationFiled: January 6, 2005Publication date: May 7, 2009Inventors: Natsume Matsuzaki, Naoshi Usuki, Hiroyuki Iitsuka, Hiroki Yamauchi
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Patent number: 7512962Abstract: A multichannel display data generating apparatus for generating data for displaying AV data on a multiscreen has a plurality of screens for displaying AV data of a plurality of channels, said apparatus comprising: input means for inputting AV data of a plurality of channels being transferred using a transport packet of a transport stream; a smaller number of PCR extracting means for extracting in a time-sharing mode the PCR of a plurality of channels displayed on said plurality of screens than the number of said plurality of screens; the same number of PLL means for establishing PLL synchronization by using said extracted PCR as the number of said plurality of screens; the same number of STC (system time clock) counter means for counting the times of the channels displayed on said plurality of screens by using the oscillation frequency of said PLL means as the number of said plurality of screens; AV decoding means for AV-decoding the AV data of the channels displayed on said multiscreen in AV synchronizatiType: GrantFiled: May 13, 2005Date of Patent: March 31, 2009Assignee: Panasonic CorporationInventors: Shoichi Gotoh, Yoshiki Kuno, Hiroyuki Iitsuka, Masazumi Yamada, Ryogo Yanagisawa, Hirotoshi Uehara, Toshiaki Tsuji
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Publication number: 20080244698Abstract: In a system which attaches update information required to create a content key used for content encryption/decryption to encrypted content and transmits the encrypted content, there is used an authorized content verification method including a verification request step of, by a receiver, transmitting an authorization verification request including update information received from a transmitter, an update information check step of, by the transmitter, checking whether the update information included in the received authorization verification request is predetermined update information, a message-of-acceptance transmission step of creating a message of acceptance using the update information and an exchange key shared between the transmitter and the receiver and transmitting the message of acceptance if the update information matches the predetermined update information, and an authorized content determination step of, by the receiver, determining that content is authorized content on the basis of reception ofType: ApplicationFiled: October 12, 2005Publication date: October 2, 2008Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Ayako Takatsuji, Hiroyuki Iitsuka, Naoshi Usuki
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Patent number: 7415039Abstract: It is objected to simplify a procedure concerning bandwidth acquisition. Bandwidth acquiring means 809 of a second transmitting apparatus 814 acquires a bandwidth which was used by a first transmitting apparatus 806 by using a propagation delay identifier804 read from first transmitting apparatus 806 and a maximum transmission data size 805 after stopping transmission of first transmitting apparatus 806. Each apparatus is composed so that transmission is started using this bandwidth and because returning and re-acquisition are not accompanied when the transmission is switched, necessary procedure can be simplified. Further, it is possible to effectively use the bandwidth by using a propagation delay identifier.Type: GrantFiled: March 17, 2005Date of Patent: August 19, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hidetoshi Takeda, Hiroyuki Iitsuka, Takuya Nishimura, Masazumi Yamada
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Patent number: 7380118Abstract: A Controller 20 sends to a Consumer 40 a command for reserving a plug/port in order to send/receive data using an Asynchronous transmission (Step 211) and receives information on a port connecting from the Consumer 40 (Step 212). The Controller 20 further sends to a Producer 30 a command for reserving a port/plug for sending content or the like (Step 213) and receives from the Producer 30 information on a Producer plug/port used for transmission (Step 214). After this, the Controller 20 notifies the Consumer 40 of the information on the port of the Producer 30 (Step 215) and receives a response from the Consumer 40 (Step 216). Next, the Consumer 40 issues a device authentication request command to the Producer 30 (Step 219) and they perform mutual device authentication and exchange of keys (Step 217).Type: GrantFiled: May 28, 2003Date of Patent: May 27, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hideyuki Kuwano, Hiroyuki Iitsuka
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Publication number: 20080072046Abstract: The conventional data transmitting/receiving system has problems: that a correct measurement cannot be performed because a measurement result is an addition of a verification processing time and a transmission time; that an authentication processing which is necessary for a transmission time measurement processing needs to be separately required; and that an unnecessary key exchange processing is executed.Type: ApplicationFiled: September 6, 2005Publication date: March 20, 2008Inventors: Yasushi Ayaki, Hiroyuki Iitsuka, Naoshi Usuki
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Publication number: 20080019276Abstract: The present invention provides a content distribution management device that manages content distribution for a receiver which is permitted to share a content stored in a transmitter. The content distribution management device is a content distribution management device that manages content distribution in the case where a transmitter distributes a content to a plurality of receivers, the content distribution management device including a registration information/counter changing unit (205) which sets, in a registration information/counter holding unit (203), a valid reception period which is a maximum length of time for which the receivers can receive the content, the receivers being permitted to share the content, and the registration information/counter changing unit (205) manages, in accordance with a status of distribution of the content from the transmitter, a length of time for which all the receivers permitted to share the content can receive the content.Type: ApplicationFiled: September 6, 2005Publication date: January 24, 2008Inventors: Ayako Takatsuji, Hiroyuki Iitsuka, Naoshi Usuki
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Patent number: 7287282Abstract: In the case that a bridge unit is connected to a network such as an IEEE 1394 bus, copyright holders want to limit the number of apparatuses that can receive a signal. The invention provides at least one reception unit, or more, that is utilized for receiving data requiring copyright protection, connected to a network and by providing a transmission unit for transmitting data requiring copyright protection to a reception unit by utilizing a network, wherein the transmission unit has an authentication means on the transmission side for carrying out authentication for a reception unit and an authentication number counting means for counting the authentication number that is the number of the authentications carried out by the authentication means on the transmission side while the reception unit has an authentication means on the reception side for carrying out authentication for the authentication means on the transmission side and wherein the above authentication number is limited.Type: GrantFiled: September 17, 2001Date of Patent: October 23, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Masazumi Yamada, Hiroyuki Iitsuka, Naoshi Usuki
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Patent number: 7239709Abstract: A data recording/reproducing method wherein encrypted digital data obtained by subjecting digital data to first encrypting by using a contents key and encrypted contents key obtained by subjecting the contents key to second encrypting are recorded on a recording medium, the encrypted digital data and the encrypted contents key, having been recorded, are reproduced, and the encrypted digital data is decrypted by using the contents key obtained by decrypting the encrypted contents key, thereby to obtain the digital data.Type: GrantFiled: January 25, 1999Date of Patent: July 3, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Masazumi Yamada, Hiroyuki Iitsuka, Shoichi Goto, Hideaki Takechi
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Patent number: 7218736Abstract: A data transfer method which eliminates erroneous operation of conventional devices not supporting encryption when copy-protected AV information is encrypted and sent on an IEEE 1394 bus. Synchronous data transferred through isochronous communication contains i) encryption identification information for indicating encryption of actual data and ii) actual data. Only the actual data is encrypted. Encryption identification information indicating encryption of actual data in synchronous data is sent together with actual data from the sending device. A receiving device detecting encryption of actual data from this encryption identification information requests decrypting information from the sending device. The receiving device decrypts the actual data using decrypting information received from the sending device according to this request.Type: GrantFiled: April 22, 1998Date of Patent: May 15, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Takuya Nishimura, Hiroyuki Iitsuka, Masazumi Yamada
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Patent number: 7146498Abstract: The problem to be solved is that once copyright claimed AV data is passed to application software, the application software can freely process the AV data for recording, etc., defeating the purpose of copyright protection. The invention provides a computer which comprises a system section 12 and an application software section 13, and which takes in copyright claimed, encrypted data via a digital interface 1 for processing therein, wherein the system section 12 judges that the application software section 13 is legitimate application software for the protection of copyright, and if the application software is a legitimate one, the system section 12 passes a key for the encrypted data to the application software section 13.Type: GrantFiled: February 21, 2000Date of Patent: December 5, 2006Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hideaki Takechi, Masazumi Yamada, Hiroyuki Iitsuka, Takuya Nishimura, Yoshiki Kuno, Shoichi Gotoh