Patent application number | Description | Published |
20080270513 | DATA TRANSMITTING APPARATUS, DATA RECEIVING APPARATUS, AND DATA TRANSMITTING AND RECEIVING SYSTEM - A data transmitting apparatus that transmits content data having use restriction is provided. The data transmitting apparatus includes: a data transmitting unit that transmits the content data to the first data receiving apparatus that receives the content data for viewing, and transmits the content data to the second data receiving apparatus that receives the content data so that the content data is transferred; a calculation unit that calculates a time required for the data transmitting unit to complete transmitting the content data to the first or second data receiving apparatus; and a notification unit that notifies the first or second data receiving apparatus of the time calculated by the calculation unit. The first or second data receiving apparatus that receives the notification is the data receiving apparatus that is not the data receiving apparatus corresponding to the time. | 10-30-2008 |
20090041424 | TRANSMITTING-SIDE RECORDING AND REPRODUCING APPARATUS, AND RECEIVING-SIDE RECORDING AND REPRODUCING APPARATUS - A conventional recording and reproducing apparatus cannot move second copyright-protected AV data while moving a first copyright-protected AV content when moving such AV data via a network because the recording and reproducing apparatus issues an exchange key to be used for decrypting the AV data to a single receiving-side recording and reproducing apparatus only. | 02-12-2009 |
20090136207 | AV DATA TRANSMITTING APPARATUS AND AV DATA RECEIVING APPARATUS - 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. | 05-28-2009 |
20090254751 | DATA TRANSMISSION APPARATUS, DATA RECEPTION APPARATUS, AND DATA TRANSFER SYSTEM - Provided is a data transmission apparatus, a data reception apparatus, and a data transfer system which can prevent a case where the same usable data is present in plural apparatuses at the same time and can certainly the move data, in MOVE processing of the data between the data transmission apparatus and the data reception apparatus. The data transmission apparatus ( | 10-08-2009 |
20090257587 | AV DATA TRANSMISSION APPARATUS, AV DATA RECEPTION APPARATUS, AND AV DATA TRANSMISSION AND RECEPTION SYSTEM - An AV data transmission apparatus comprising: an encryption unit which encrypts AV data; an AV data transmission unit which transmits the encrypted AV data; a cipher-type-information switching unit which switches cipher type information indicating a cipher scheme used for the AV data, to other cipher type information; and a cipher-type-information transmission unit which transmits cipher type information. When transmitting AV data which is prohibited from being used in a reception apparatus that does not support new usage control information, the AV data transmission apparatus assigns different cipher type information to be notified to the reception apparatus, so that even the reception apparatus which cannot recognize the new usage control information can recognize that being unable to perform decryption is due to new encryption performed by the AV data transmission apparatus. | 10-15-2009 |
20090257588 | AV DATA TRANSMISSION APPARATUS AND AV DATA TRANSMISSION METHOD - An AV data transmission apparatus having two or more output channels, the apparatus comprising: an encryption unit which encrypts AV data using an encryption key; an AV data transmission unit which transmits the encryption key and the encrypted AV data to AV data reception apparatuses from each output channel; an encryption key switching unit which switches an encryption key generation scheme to another one for the encryption key transmitted through a selected output channel; an output suspension unit which suspends output of the encrypted AV data transmitted through a selected output channel; and a control unit which causes (i) the output suspension unit to select an output channel and suspend the output of the encrypted AV data through the selected output channel, and then causes (ii) the encryption key switching unit to select the same output channel and switch the encryption key generation scheme to another one for the output channel. | 10-15-2009 |
20100077488 | DATA TRANSMISSION APPARATUS, DATA RECEPTION APPARATUS, AND DATA TRANSMISSION AND RECEPTION SYSTEM - A data transmission and reception system and the like are provided, which are capable of preventing: unauthorized copying between a server and a client; and unnecessary use limit when a copyright constraint is conformed. A server generates and manages overall use permission information indicating that the overall data accumulated in the server can be used and distributes the overall use permission information together with copied data to the client determined to exist within a private use range. The client manages the overall use permission information and the data received from the server in such a manner associated with each other and enables use of the data received from the server only when the overall use permission information is valid. When the client moves only within the private use range, the server continuously manages the overall use permission information so as to enables use of the copied data. Meanwhile, use of the copied data in the client which has moved out of the private use range is inhibited. | 03-25-2010 |
20100186092 | NETWORK AUDIO-VIDEO CONTENTS PLAYBACK TERMINAL, SERVER, AND SYSTEM - Methods to set a viewing and/or listening term are classified into two types, which are a fixed-time-length type to limit time length and a fixed-expiration-time type to limit expiration time. And the timings of license acquisition are classified into two types which are an immediate-acquisition type and a point-of-use type. The type of the timing of license acquisition is written to a meta data which is to be sent to a terminal before initiating download. The terminal determines the timing of license acquisition according to the meta data. When contents are point-of-use type, the terminal doesn't acquire a key and an expiration time information until a time of initiating playback. On the other hand, when contents are immediate-acquisition type, the terminal acquires the key and the expiration time information at any point of time. Since the key is acquired at the early timing such as download completion timing, a reaction velocity in response to a playback instruction can be heighten. | 07-22-2010 |
20110067111 | CONTENT RECEIVER, CONTENT REPRODUCER, CONTENT REPRODUCING SYSTEM, CONTENT WRITING-OUT METHOD, VIEWING EXPIRATION TIME DETERMINING METHOD, AND PROGRAM - A content receiver writes out, together with content received from a content server, time supply source designation information indicating a second time supply source designated by a copyright protection system (DRM) to an exchangeable medium in association with the content. When the time supply source designation information is recorded in the exchangeable medium, a content reproducer performs viewing expiration time determination for the content recorded in the exchangeable medium referring time obtained on the basis of the second time supply source indicated by the time supply source designation information instead of a first time supply source referred to in order to specify present time used in determining a viewing expiration time in a content protection system (CPS). | 03-17-2011 |
20110072269 | NETWORK AV CONTENTS PLAYBACK SYSTEM, SERVER, PROGRAM AND RECORDING MEDIUM - A system, including: an audio-visual terminal; and a storage terminal, wherein the audio-visual terminal establishes a first connection protected by authentication and encryption, to server providing AV contents on a network; acquires an authorization to use of the contents by the first connection, concurrently acquires download control information including contents location information that indicates a location of the AV contents on the network and license information about the AV contents; and transmits the acquired download control information to the storage terminal, and the storage terminal acquires the download control information from the audio-visual terminal, downloads the contents from the server based on the contents location information via the network and stores the contents; acquires a license of the contents from the server based on the license information and stores the license; and uses the contents for a predetermined period based on the stored license. | 03-24-2011 |
20110119504 | CONTENT PROTECTING METHOD, CONTENT REPRODUCING APPARATUS, AND PROGRAM - A content reproducing apparatus includes a viewing expiration time determining unit which determines lapse of a viewing expiration time, a decryption key temporary storage unit which temporarily stores a decryption key, a decryption key moving unit which moves the decryption key from a recording medium to the decryption key temporary storage unit and returns the decryption key onto the recording medium, and a content protection control unit which controls the movement and the return of the decryption key. The content protection control unit performs control to move, when a reproduction start instruction is received, the decryption key from the recording medium to the decryption key temporary storage unit, return, when the reproduction of the content ends, the decryption key onto the recording medium when the viewing expiration time has not lapsed, and not return the decryption key onto the recording medium if the viewing expiration time has lapsed. | 05-19-2011 |
20110179497 | DATA TRANSMISSION AND RECEPTION CONTROL APPARATUS, AND DATA TRANSMISSION AND RECEPTION SYSTEM, METHOD, AND PROGRAM - A portable terminal ( | 07-21-2011 |
20110289594 | CONTENT RECEIVER, CONTENT UTILIZATION SYSTEM, VIEWING TIME LIMIT DETERMINATION METHOD, PROGRAM, AND RECORDING MEDIUM - When a control unit of a content receiver causes to write out content to an exchangeable medium, causes to also write out a viewing license of the content to the exchangeable medium, and further causes an invalidating/validating unit to invalidate a viewing license of related content belonging to a same predetermined content group as the content if a viewing time limit of the content is not determined. When a content reproducer reproduces the content recorded in the exchangeable medium, determines the viewing time limit of the content and records it to the exchangeable medium. When the exchangeable medium which is reproduced by the content reproducer is installed, the control unit causes to set a viewing time limit of the related content to the same time limit as the viewing time limit of the content on the exchangeable medium and causes to validate the viewing license of the related content. | 11-24-2011 |
20120275758 | RECEIVING TERMINAL, AND CONTENT EXPORTING METHOD - A receiving terminal comprises a data acquiring unit which acquires from the content server information that is required for the export of the content and that includes information about a capability required for the receiving terminal and information about a capability required for the removable medium, a propriety judgment unit which compares the information about the capability required for the receiving terminal with information about a capability the receiving terminal possesses, compares the information about the capability required for the removable medium with information about a capability the removable medium possesses, and judges whether the export processing of the content can be performed or not, and a control unit which makes a processing relevant to a purchase of the content or to the export of the content perform, according to a judgment result by the propriety judgment unit. | 11-01-2012 |
20130007798 | CONTENT RECEIVER, CONTENT USE SYSTEM, AND CONTENT REPRODUCING METHOD - A downloader receives a service providing period within which a service dealer is permitted to perform a viewing service by a content right holder and a viewing period showing a period within which each user is allowed to view a content, with the content, from a server. A license information conversion unit calculates a viewing expiration time for first-time viewing within which the user can view a first-time viewing, by using the service providing period and the viewing period. A writing-out unit writes out the viewing expiration time for first-time viewing and the viewing period, with the content, to an exchangeable medium. When a first viewing time of the user is within the viewing expiration time for first-time viewing, the viewing terminal calculates a viewing expiration time by adding the viewing period to the first viewing time, and writes the viewing expiration time back into the exchangeable medium. | 01-03-2013 |
20130019322 | CONTENT RECEIVER, LICENSE SERVER, CONTENT UTILIZATION SYSTEM, AND CONTENT VIEWING TIME LIMIT MANAGEMENT METHOD - A license receiver comprises a viewing license invalidating unit which invalidates a viewing license of a content a viewing time limit of which is not determined, and a first control unit. When the first control unit reproduces the content, (i) if the viewing license is valid, the first control unit determines the viewing time limit, and (ii) if the viewing license is invalid, the first control unit transmits a viewing license request including a request of determining viewing time limit, to the license server, and receives the determined viewing time from the license server. When the first control unit writes out the content to an exchangeable medium before reproducing the content, if the viewing license is valid, the first control unit invalidates the viewing license and writes out the non-determined viewing time limit to the exchangeable medium. | 01-17-2013 |
20130039492 | CONTENT RECEIVING TERMINAL, CONTENT EXPORTING AND REPRODUCING METHOD, AND RECORDING MEDIUM - A content exporting and reproducing method includes i) a content export step of encrypting a decryption key for content, that is used for decrypting the encrypted content, by using an encryption key for decryption key, recording the encrypted decryption key for content in the portable recording medium, and exporting the encrypted content sequentially to the portable recording medium, and ii) a content reproduction step of reading out the encrypted decryption key for content from the portable recording medium, decrypting the encrypted decryption key for content by using a decryption key for decryption key, reading out the encrypted content that has been exported to the portable recording medium, and decrypting the encrypted content that is read out from the portable recording medium, by using the decrypted decryption key for content to reproduce the content, while the encrypted content is exported to the portable recording medium sequentially. | 02-14-2013 |
20130055414 | DOWNLOAD TERMINAL, AND CONTENT UTILIZATION SYSTEM - A download terminal acquires and stores a content from a content server, acquires from a license server, a writing-out license including a use condition for writing out of the content to an exchangeable medium and writes out the content to the exchangeable medium according to the writing-out license. The writing-out license includes a pack identifier given to a content group to which the content belongs, and viewing term information of the content, as the use condition. The download terminal determines based on the viewing term information, a viewing time limit of the content to be written out, and synchronizes a viewing time limit of other content having a same pack identifier as that of the content. | 02-28-2013 |