| Patent application number | Description | Published |
|---|
| 20080285741 | TELEPHONE INTERFACE CIRCUIT - A telephone interface circuit has a first transistor for opening and closing a connection between a speech circuit and a pair of subscriber lines, a second transistor for controlling ON/OFF states of the first transistor, and a positive feedback circuit for positively feeding back, to a base terminal of the second transistor, a part of collector current flowing through the first transistor. A circuit constant is set such that when normal use voltage is applied to the pair of subscriber lines, the second transistor operates in a saturation region, and when voltage exceeding the normal use voltage is applied to the pair of subscriber lines, the second transistor operates in a non-saturation region. | 11-20-2008 |
| 20100119054 | TELEPHONE INTERFACE CIRCUIT - A telephone interface circuit comprises: a first transistor which switch-controls a connection between a speech circuit and a pair of subscriber lines; a second transistor which controls an on/off state of the first transistor; a positive feedback circuit which connects a collector terminal of the first transistor to a base terminal of the second transistor; and an internal power source which supplies current for driving the second transistor. A circuit constant is set such that the first transistor is to operate in a saturated region when a voltage in a range of voltage for normal use is applied in between the pair of the subscriber lines, and such that the first transistor is to operate in an unsaturated region when an overvoltage exceeding the range of voltage for normal use is applied in between the pair of the subscriber lines. | 05-13-2010 |
| 20100121966 | REPEATER AND REPEATING METHOD THEREOF - According to one embodiment, a repeater receives content data from a sender device through a first content protection technology and transmits the content data to another device through a second content protection technology. The repeater includes a receiver, a preparation module, and a transmitter. The receiver receives identification information that identifies a device compliant with the second content protection technology through the second content protection technology. The preparation module prepares an identification information list based on the first content protection technology that contains the identification information based on the second content protection technology received by the receiver and identification information based on the first content protection technology that identifies the repeater. The transmitter transmits the identification information list to the sender device through the first content protection technology. | 05-13-2010 |
| 20100275022 | TRANSMITTER, RECEIVER, AND CONTENT TRANSMITTING AND RECEIVING METHOD - According to one embodiment, a transmitter is configured to transmit content to a receiver. Available dubbing count is set in advance for the content such that the content can be dubbed a plurality of times. The transmitter includes a key exchanger, an encryption processor, and a dubbing management module. The key exchanger performs key exchange to share a common key with the receiver. The encryption processor encrypts, in response to a content request received from the receiver, the content with the common key to transmit the content to the receiver. The dubbing management module reduces, upon receipt of a right transfer request related to the use of the content from the receiver, the available dubbing count by dubbing count indicating the number of times of dubbing of the content. The dubbing count is contained in the right transfer request. | 10-28-2010 |
| 20100275023 | TRANSMITTER, RECEIVER, AND CONTENT TRANSMITTING AND RECEIVING METHOD - According to one embodiment, a transmitter configured to transmit content to a receiver. Available dubbing count is set in advance for the content such that the content can be dubbed a plurality of times. The transmitter includes a key exchanger, an encryption processor, and a management module. The key exchanger performs key exchange to share a common key with the receiver, and transmits the common key and at least one count label corresponding to the number of times of dubbing to the receiver. The encryption processor encrypts, in response to a content request for the content received from the receiver, the content with the common key to transmit the content to the receiver. The management module reduces the available dubbing count of the content upon each receipt of a right transfer request requesting to transfer right to use the content from the receiver, and transmits permission to the receiver to validate the right to use the content. | 10-28-2010 |
| 20110320824 | INFORMATION PROCESSING APPARATUS AND INFORMATION PROCESSING METHOD - An information processing method has a request determining part determining a request type for streaming contents from a communicating apparatus, a copy number managing part managing the number of copies permissible for the communicating apparatus when permission of one or more of copies of streaming contents is requested, a stream number managing part managing the number of streams now in communication when the request determining part determines that the communicating apparatus has requested transfer of streaming contents without asking permission of one or more of copies, and to make stop transfer of streaming contents if the number of streams now in communication exceeds a predetermined threshold value, a key-selection processing part selecting a first key corresponding to transfer of streaming contents permissible for one or more of copies or a second key corresponding to transfer of streaming contents for copies with generation management restriction or not permissible for copies, an encryption processing part generating encrypted streaming contents using the first or the second key, and a packet processing part generating a packet that includes the encrypted streaming contents and key information selected by the key-selection processing part and to include information on the number of copies to the packet when the first key is selected. | 12-29-2011 |
| 20120084558 | INFORMATION PROCESSING APPARATUS AND INFORMATION PROCESSING METHOD - An information processing apparatus has an authentication and key exchange processing unit, a packet selector, a content key generator, a content decryption unit to decrypt, based on the content key, the encrypted content which is included in the content packet and received following the CCI packet, a CCI set identifier management unit to manage a CCI identifier corresponding to recognizable copy control information, a CCI selector, a CCI analyzer to analyze copy control information corresponding to the CCI identifier selected by the CCI selector, a content processing unit to perform, based on an analysis result of the CCI analyzer, the receiving process on the content data corresponding to the content packet received following the CCI packet, a first communication connection unit to perform the authentication and key exchange process, and a second communication connection unit to transmit the content packet and the CCI packet. | 04-05-2012 |
