Abstract: An electronic device includes controller that generates, as a first image, an image in which a second display object is disposed in a region that is on a layer lower than a topmost layer and that is identical to a display region of a second image of a synthetic image while image superimposing unit is outputting synthetic image signal to display, monitors a change in color of an image within the region where the second display object is disposed in the first image, and changes a display form of the synthetic image upon detection of the change in color.

Abstract: An electronic device includes controller that generates, as a first image, an image in which a second display object is disposed in a region that is on a layer lower than a topmost layer and that is identical to a display region of a second image of a synthetic image while image superimposing unit is outputting synthetic image signal to display, monitors a change in color of an image within the region where the second display object is disposed in the first image, and changes a display form of the synthetic image upon detection of the change in color.

Abstract: 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.

Abstract: An information processing apparatus 10a according to the present disclosure includes: a touchscreen panel 14 on which video is displayed and which accepts an operation that has been performed by a user; a detector 21 which detects the operation that has been performed by the user on the touchscreen panel 14; and a processor 20 which performs processing in response to the operation. If the user has performed the operation using a polyhedron input interface device 10b which has a plurality of sides in mutually different shapes, the detector 21 detects the shape of an area in which the input interface device 10b is in contact with the touchscreen panel to determine which side of the polyhedron has been used to perform the operation, and the processor 20 carries out processing that is associated with the side that has been used.

Abstract: A source device includes: a storage unit which stores the file; a receiving unit which receives, from a sink device, a file acquisition request; a transmitting unit which transmits, to the sink device, data within a range specified in the file acquisition request received by the receiving unit, from among the file stored in the storage unit; a limitation unit which deletes or makes unusable data within the range transmitted by the transmitting unit, from among the file stored in the storage unit; and a notification unit which notifies the sink device of a usable range which is a range in which the file is neither deleted nor made unusable by the limitation unit, from among the file stored in the storage unit.

Abstract: A conventional AV data receiving device switches to a key for distribution to an outdoor device when a network environment is switched to an outdoor network environment, thus resulting in high key switching frequency. In view of this, an AV data receiving device according to the present invention determines, after switching the network environment from indoors to outdoors as a result of moving the AV data receiving device, whether or not key switching should be performed, before a command for restricting a hop count on a route from an AV data transmission device located indoors is transmitted, and performs authentication and key exchange processing for outdoor device distribution, so as to switch to the key for outdoor device distribution.

Abstract: A display device in which continuity of content displayed on a screen is maintained between before and after a rotation of the screen, including: a display screen which is fixed to the display device and displays a partial region of an image; an operation detecting unit which specifies a position in the partial region of the image displayed on the display screen; a rotation detecting unit which detects rotation information which indicates a rotation of the display device in a plane including the display screen; and a display image determining unit which updates display content on the display screen to display the partial region of the image after the rotation on the display screen by rotating, based on the rotation information detected by the detecting unit, the partial region of the image around the position specified by the specifying unit.

Abstract: Provided is an AV data transmission apparatus including two or more output channels, an encryption unit encrypting AV data using an encryption key, and an AV data transmission unit transmitting the encryption key and the encrypted AV data to AV data reception apparatuses from each output channel. The apparatus also includes an encryption key switching unit switching an encryption key generation scheme to another one for the encryption key transmitted through a selected output channel, an output suspension unit suspending output of the encrypted AV data transmitted through a selected output channel, and a control unit (i) causing 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 (ii) causing 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.

Abstract: An AV data transmission apparatus includes 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, which is used to notify the reception apparatus, so that even the reception apparatus which cannot recognize the new usage control information can recognize its inability to perform decryption is due to new encryption performed by the AV data transmission apparatus.

Abstract: A data recording apparatus (101) in the present invention includes: a data recording unit (13) that records and holds AV data supported by a copyright protection system permitting multiple times dubbing; a media recording unit (17) that performs dubbing or moving of the AV data between storage medium and the data recording unit (13), or between storage medium and different storage medium; a dubbing management information management unit (14) that manages dubbing management information for the AV data; and a media determination unit (18) that determines whether the storage medium is rewritable or non-rewritable based on the media type of storage medium. When the media recording unit (17) performs moving of the AV data from the data recording unit (13) to the storage medium, the dubbing management information management unit (14) updates the dubbing management information management unit (14) corresponding to the AV data according to the determination result.

Abstract: A conventional AV data receiving device switches to a key for distribution to an outdoor device when a network environment is switched to an outdoor network environment, thus resulting in high key switching frequency. In view of this, an AV data receiving device according to the present invention determines, after switching the network environment from indoors to outdoors as a result of moving the AV data receiving device, whether or not key switching should be performed, before a command for restricting a hop count on a route from an AV data transmission device located indoors is transmitted, and performs authentication and key exchange processing for outdoor device distribution, so as to switch to the key for outdoor device distribution.

Abstract: A data transmission apparatus, a data reception apparatus, and a data transfer system prevent a case where same usable data is present in plural apparatuses at the same time and can certainly move data, in MOVE processing of the data between the data transmission apparatus and the data reception apparatus. The data transmission apparatus includes a synchronous control unit synchronizing a timing of (i) deleting or invalidating, in the data transmission apparatus, move-target data and (ii) decrypting, in the data reception apparatus, the move-target data that has been encrypted. With this, it becomes possible to prevent a case where the same usable data is present in plural apparatuses at the same time.

Abstract: A portable terminal (2) is a data transmission and reception control apparatus. A Proximity confirmation unit (23) confirms a first proximity condition of proximity to the data transmission apparatus. A proximity apparatus authentication and registration processing unit (21) registers the portable terminal (2) into the data transmission apparatus when authentication in conjunction with the data transmission apparatus is successful, and the first proximity condition is satisfied. A proximity confirmation unit (27) confirms a second proximity condition of proximity to the data reception apparatus. A registration starting and authentication processing unit (26) obtains identification information of the data reception apparatus when authentication in conjunction with the data reception apparatus is successful, and when the second proximity condition is satisfied.

Abstract: A data recording apparatus (101) in the present invention includes: a data recording unit (13) that records and holds AV data supported by a copyright protection system permitting multiple times dubbing; a media recording unit (17) that performs dubbing or moving of the AV data between storage medium and the data recording unit (13), or between storage medium and different storage medium; a dubbing management information management unit (14) that manages dubbing management information for the AV data; and a media determination unit (18) that determines whether the storage medium is rewritable or non-rewritable based on the media type of storage medium. When the media recording unit (17) performs moving of the AV data from the data recording unit (13) to the storage medium, the dubbing management information management unit (14) updates the dubbing management information management unit (14) corresponding to the AV data according to the determination result.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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 (101) includes a synchronous control unit (405) that synchronizes a timing of deleting or invalidating, in the data transmission apparatus (101), move-target data and a timing of decrypting, in the data reception apparatus (102), the move-target data that has been encrypted. With this, it becomes possible to prevent a case where the same usable data is present in plural apparatuses at the same time.

Abstract: 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.

Abstract: A source device includes: a storage unit which stores the file; a receiving unit which receives, from a sink device, a file acquisition request; a transmitting unit which transmits, to the sink device, data within a range specified in the file acquisition request received by the receiving unit, from among the file stored in the storage unit; a limitation unit which deletes or makes unusable data within the range transmitted by the transmitting unit, from among the file stored in the storage unit; and a notification unit which notifies the sink device of a usable range which is a range in which the file is neither deleted nor made unusable by the limitation unit, from among the file stored in the storage unit.