Abstract: Provided are a contact charging system, a power feeding device, a power receiving device, and a contact charging method that prevent damage to a power feeding terminal and a power receiving terminal, even when the charging power is high power. When charging a high-voltage battery, a power feeding-side motor or a power receiving-side motor is rotated in a state with a power feeding terminal and a power receiving terminal pressed against each other, and power is thereby transmitted from one of the power feeding terminal and the power receiving terminal to the other. In a state with both the power feeding terminal and the power receiving terminal rotated in this manner, electric power is supplied from the power feeding terminal to the power receiving terminal.

Abstract: A digital broadcast receiver includes: a receiver that receives a broadcast signal of a physical channel in digital broadcasting; a current position detector that detects a current position; a current region determiner that determines, as a current region, a region to which the current position belongs; a receivability determiner that controls the receiver to determine whether the broadcast signal of the physical channel can be received; a storage unit that stores receivable area information indicating a receivable area where the broadcast signal of the physical channel can be received; and an updating unit that, when the receivability determiner determines that the broadcast signal can be received, obtains, out of the stored receivable area information, receivable area information for the current region indicating a receivable area in the current region, and performs an update process to update the receivable area information for the current region based on the current position.

Abstract: A digital broadcast receiver includes: a receiver that receives a broadcast signal of a physical channel in digital broadcasting; a current position detector that detects a current position; a current region determiner that determines, as a current region, a region to which the current position belongs; a receivability determiner that controls the receiver to determine whether the broadcast signal of the physical channel can be received; a storage unit that stores receivable area information indicating a receivable area where the broadcast signal of the physical channel can be received; and an updating unit that, when the receivability determiner determines that the broadcast signal can be received, obtains, out of the stored receivable area information, receivable area information for the current region indicating a receivable area in the current region, and performs an update process to update the receivable area information for the current region based on the current position.

Abstract: A digital broadcast receiver on a mobile body includes: a tuner that receives a broadcast signal of a physical channel; a signal intensity detector that detects a signal intensity of the broadcast signal; a current position detector that detects a current position of the mobile body; a movement direction detector that detects a movement direction of the mobile body; a reception judging unit that controls the tuner to judge whether the physical channel can be received; an area information storage unit that stores receivable area information indicating a receivable area of the physical channel; and an area information updating unit that determines, when it is judged that the physical channel can be received, a position apart from the current position in the movement direction according to the signal intensity as a receivable position, and updates the receivable area information to extend the receivable area to the receivable position.

Abstract: A digital broadcast receiving apparatus with enhanced tuning speed is provided. The digital broadcast receiving apparatus includes a data separating unit that separates the encoded stream of a tuned broadcast program and a plurality of latest tuning information from a digital broadcast stream, on the basis of stored tuning information recorded in a tuning information table, a decoding unit that performs a decoding process on the separated encoded stream, and a tuning control unit. The tuning control unit concurrently executes a first reception confirmation process to decide whether first tuning information included in the latest tuning information is consistent with the stored tuning information and a second reception confirmation process to decide whether second tuning information in the latest tuning information is consistent with the stored tuning information. The tuning control unit executes the first and second reception confirmation processes concurrently with the decoding process.

Abstract: Disclosed is a digital broadcast reception device that includes a plurality of tuner/demodulator units; a tuning control unit; a current position detection unit for detecting a current position; a channel scan control unit that has one of the plurality of tuner/demodulator units perform tuning for program viewing or listening, and has another one of the plurality of tuner/demodulator units perform a channel scan by tuning to the physical channels sequentially and detecting receivable physical channels; a broadcast area map generation unit for generating broadcast area maps including the receivable physical channels when the channel scan is executed, broadcast service information regarding broadcast content of the physical channels, and receivable position information; and a broadcast area map storage unit for storing the generated broadcast area maps.

Abstract: The present invention provides a digital broadcast receiver which reduces the time needed for channel scans by performing efficient channel scanning when broadcasts in a plurality of broadcast protocols are received. As a first phase channel scan, a first controller and a second controller divide a plurality of channels included in an overlapping frequency band of a first broadcast protocol and a second broadcast protocol, and execute parallel channel scans. After the first phase channel scan, the first controller scans channels in which electrical signals generated from electromagnetic waves received by a second tuner in the first phase channel scan could not be demodulated by a second demodulator, and the second controller scans channels in which electrical signals generated from electromagnetic waves received by a first tuner could not be demodulated by a first demodulator.

Abstract: A digital broadcast receiver on a mobile body includes: a tuner that receives a broadcast signal of a physical channel; a signal intensity detector that detects a signal intensity of the broadcast signal; a current position detector that detects a current position of the mobile body; a movement direction detector that detects a movement direction of the mobile body; a reception judging unit that controls the tuner to judge whether the physical channel can be received; an area information storage unit that stores receivable area information indicating a receivable area of the physical channel; and an area information updating unit that determines, when it is judged that the physical channel can be received, a position apart from the current position in the movement direction according to the signal intensity as a receivable position, and updates the receivable area information to extend the receivable area to the receivable position.

Abstract: An unreceivability detector (6) that, based on various information obtained from a signal received from a broadcasting station of a digital broadcast program being viewed/listened to, detects that the received signal of that broadcasting station is currently unreceivable and outputs an unreceivability notification, an affiliated station memory (8) that stores channel information of the program being viewed/listened to and channel information of a station affiliated with that broadcasting station, and a tuning control unit (7) that, when it receives an unreceivability notification from the unreceivability detector, retrieves the channel information of the affiliated station from the affiliated station memory (8) and permits the program of the affiliated station to be viewed/listened to, if it is currently in a receivable state, and outputs an instruction to make a channel search for an affiliated station if no affiliated station is stored in the affiliated station memory are provided.

Abstract: The present invention provides a digital broadcast receiver which reduces the time needed for channel scans by performing efficient channel scanning when broadcasts in a plurality of broadcast protocols are received. As a first phase channel scan, a first controller and a second controller divide a plurality of channels included in an overlapping frequency band of a first broadcast protocol and a second broadcast protocol, and execute parallel channel scans. After the first phase channel scan, the first controller scans channels in which electrical signals generated from electromagnetic waves received by a second tuner in the first phase channel scan could not be demodulated by a second demodulator, and the second controller scans channels in which electrical signals generated from electromagnetic waves received by a first tuner could not be demodulated by a first demodulator.

Abstract: A digital broadcast receiving apparatus with enhanced tuning speed is provided. The digital broadcast receiving apparatus includes a data separating unit that separates the encoded stream of a tuned broadcast program and a plurality of latest tuning information from a digital broadcast stream, on the basis of stored tuning information recorded in a tuning information table, a decoding unit that performs a decoding process on the separated encoded stream, and a tuning control unit. The tuning control unit concurrently executes a first reception confirmation process to decide whether first tuning information included in the latest tuning information is consistent with the stored tuning information and a second reception confirmation process to decide whether second tuning information in the latest tuning information is consistent with the stored tuning information. The tuning control unit executes the first and second reception confirmation processes concurrently with the decoding process.

Abstract: Disclosed is a digital broadcast reception device that includes a plurality of tuner/demodulator units; a tuning control unit; a current position detection unit for detecting a current position; a channel scan control unit that has one of the plurality of tuner/demodulator units perform tuning for program viewing or listening, and has another one of the plurality of tuner/demodulator units perform a channel scan by tuning to the physical channels sequentially and detecting receivable physical channels; a broadcast area map generation unit for generating broadcast area maps including the receivable physical channels when the channel scan is executed, broadcast service information regarding broadcast content of the physical channels, and receivable position information; and a broadcast area map storage unit for storing the generated broadcast area maps.

Abstract: A receiving device (50) is provided to allow appropriate clock regeneration even for a VBR TS when a stream including video and audio data, such as an MPEG2 TS, is transmitted or received in real time through a network having jitter. When the received packet data is stored in a memory (53) and the packet data is output in accordance with time information added to the received packet data, a clock frequency deviation between a sending device and a receiving device is calculated on the basis of the integration result of the amount of the received packets temporarily stored in the memory (53), the number of the received packets which have been processed, and the measurement result of the integration time used for integrating the amount of the received packets. A read timing offset of the received packet is obtained on the basis of the calculation result of the clock frequency deviation.

Abstract: A management unit (110) which issues a digital certificate to a new transmission unit (410) includes a wireless communication section for performing communication in a network (300) and a wire communication section to which the new transmission unit (410) can be connected; when the new transmission unit (410) is wire-connected to the management unit (110), it is judged in accordance with the received device type information of the new transmission unit (410), whether or not the new transmission unit (410) is a device having a communication means that can communicate in the network (300); and if the new transmission unit is judged as a device having that type of means, the management unit creates a digital certificate by using a device identifier specific to the new transmission unit (410), and sends the digital certificate to the new transmission unit (410).

Abstract: An unreceivability detector (6) that, based on various information obtained from a signal received from a broadcasting station of a digital broadcast program being viewed/listened to, detects that the received signal of that broadcasting station is currently unreceivable and outputs an unreceivability notification, an affiliated station memory (8) that stores channel information of the program being viewed/listened to and channel information of a station affiliated with that broadcasting station, and a tuning control unit (7) that, when it receives an unreceivability notification from the unreceivability detector, retrieves the channel information of the affiliated station from the affiliated station memory (8) and permits the program of the affiliated station to be viewed/listened to, if it is currently in a receivable state, and outputs an instruction to make a channel search for an affiliated station if no affiliated station is stored in the affiliated station memory are provided.

Abstract: A network configuration management includes the steps of sending from the management terminal (1100) participation terminal information stored in the management terminal; receiving by the participation terminal (1200, 1300, 1400) other than the management terminal, participation terminal information sent from the management terminal (1100); judging by the participation terminal other than the management terminal, whether or not the participation terminal can communicate with another participation terminal device that is participating in a wireless network (1010); sending a communication availability judgment result which is obtained by the judging step, from the participation terminal other than the management terminal to the management terminal (1100); and determining by the management terminal (1100), a participation terminal that should be excluded from the wireless network (1010) in accordance with the communication availability judgment result, and deleting by the management terminal device, from the par

Abstract: A management unit (110) which issues a digital certificate to a new transmission unit (410) includes a wireless communication section for performing communication in a network (300) and a wire communication section to which the new transmission unit (410) can be connected; when the new transmission unit (410) is wire-connected to the management unit (110), it is judged in accordance with the received device type information of the new transmission unit (410), whether or not the new transmission unit (410) is a device having a communication means that can communicate in the network (300); and if the new transmission unit is judged as a device having that type of means, the management unit creates a digital certificate by using a device identifier specific to the new transmission unit (410), and sends the digital certificate to the new transmission unit (410).

Abstract: A receiving device (50) is provided to allow appropriate clock regeneration even for a VBR TS when a stream including video and audio data, such as an MPEG2 TS, is transmitted or received in real time through a network having jitter. When the received packet data is stored in a memory (53) and the packet data is output in accordance with time information added to the received packet data, a clock frequency deviation between a sending device and a receiving device is calculated on the basis of the integration result of the amount of the received packets temporarily stored in the memory (53), the number of the received packets which have been processed, and the measurement result of the integration time used for integrating the amount of the received packets. A read timing offset of the received packet is obtained on the basis of the calculation result of the clock frequency deviation.

Abstract: In a wireless base station apparatus 1, when an active-mode control unit 29 stores the measured data informed from a TRX 25, a BB 26, and a wire transmission line interface unit 28 at every fixed interval of time in a shared memory 31, it stores the measuring time, and if there is a fear of data loss, the existence of data loss is determined by referring to the stored measuring time, and if a data loss occurs, the lost measured data is complemented.