Tokyo, Japan
Tokyo, Japan

KDDI Corporation is a Japanese telecommunications operator formed in October 2000 through the merger of DDI Corp. , KDD Corp., and IDO Corp. It has its headquarters in the Garden Air Tower in Iidabashi, Chiyoda, Tokyo.KDDI provides mobile cellular services using the "au by KDDI" brand. ISP network and solution services are provided under the au one net brand, while "au Hikari" is the name under which long-distance and international voice and data communications services and Fiber to the Home services are marketed. ADSL broadband services carry the brand name "ADSL One", and IP telephony over copper is branded as "Metal Plus". Wikipedia.


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In a wireless communication system in which when connecting one terminal apparatus to a base station apparatus and another base station apparatus, the other base station apparatus selects a frequency band to be used for control channels transmitted from the terminal apparatus to the other base station apparatus from a plurality of frequency bands usable by the other base station apparatus, and notifies the terminal apparatus of the selected frequency band, the base station apparatus acquires from the terminal apparatus information about radio quality of a signal received from the other base station apparatus for at least one frequency band out of the plurality of frequency bands, extracts a portion of frequency bands out of the plurality of frequency bands based on the acquired information about radio quality, and notifies the other base station apparatus of information representing the portion of frequency bands.


A terminal device is configured to establish a communication link with communication equipment through a base station device such that, upon establishing the communication link, part of the communication link is left for a certain base station while another part of the communication link is established with the terminal device through the other base station device according to a plurality of architectures, wherein the terminal device includes a wireless communication part configured to transmit support architecture information representing an architecture supported by the terminal device among a plurality of architectures to the base station device.


In a wireless communication system in which when connecting one terminal apparatus to a base station apparatus and another base station apparatus, the other base station apparatus selects a frequency band to be used for control channels transmitted from the terminal apparatus to the other base station apparatus from a plurality of frequency bands usable by the other base station apparatus, and notifies the terminal apparatus of the selected frequency band, the base station apparatus acquires, from the terminal apparatus, information about radio quality of a signal received from the other base station apparatus for at least one frequency band out of the plurality of frequency bands, extracts portion of frequency bands out of the plurality of frequency bands based on the acquired information about radio quality, and notifies the other base station apparatus of information representing the portion of frequency bands.


A video encoding apparatus AA, which encodes a digital video provided as a video signal of a pixel value space subjected to spatial and temporal sampling, includes a nonlinear video decomposition unit 10, a structure component encoding unit 20, and a texture component encoding unit 30. The nonlinear video decomposition unit 10 decomposes an input video a into a structure component and a texture component. The structure component encoding unit 20 performs compression encoding processing on the structure component of the input video a decomposed by the nonlinear video decomposition unit 10. The texture compression encoding unit 30 performs compression encoding processing on the texture component of the input video a decomposed by the nonlinear video decomposition unit 10. Such an arrangement provides improved encoding efficiency.


In the case where an input image is an image of a non-YUV420 format and an encoding unit is the smallest CU block, an adaptive-sub-sampling luma reference pixel acquisition unit sub-samples reference pixels existing neighboring a luma block corresponding to a chroma prediction target block based on a luma intra prediction mode, and acquires a pixel value of each of the sub-sampled reference pixels. In the case where the input image is an image of a non-YUV420 format and the encoding unit is the smallest CU block, an adaptive-sub-sampling chroma reference pixel acquisition unit sub-samples reference pixels existing neighboring the chroma prediction target block based on the luma intra prediction mode, and acquires a pixel value of each of the sub-sampled reference pixels.


Compression performance is improved in intra prediction. A moving image decoding device BB estimates a statistic of a prediction error that is based on an intra prediction direction using an approximated value of a parameter of the statistic of the prediction error. Regarding a prediction value obtained by prediction that is based on the intra prediction direction, a feature amount of the prediction value at a pixel near a pixel to be processed is calculated. Furthermore, a prediction error corresponding to a distance from a reference pixel to a pixel to be processed is estimated using the aforementioned parameter of the statistic, the prediction error is reflected in the prediction value that is based on the intra prediction direction using the calculated feature amount, and a new prediction value is generated.


A communication apparatus performs communication in a manner such that communication with a first base station apparatus using a first frequency band and communication with a second base station apparatus using a second frequency band are switched on a per-subframe basis, obtains, from the first base station apparatus, specification information that specifies a subframe in which the first frequency band should be used and a subframe in which the second frequency band should be used among a plurality of subframes included in one or more frames, and performs control on the basis of the specification information to communicate with the first base station apparatus in the subframe in which the first frequency band should be used and with the second base station apparatus in the subframe in which the second frequency band should be used.


Patent
Kddi | Date: 2016-04-22

Provided is a base station device in a radio communication system in which a communication device is capable of connecting to the base station device and a first other base station device simultaneously. The base station device receives, from the communication device, a notification indicating that a failure has occurred in a radio link between the communication device and the first other base station device, and upon receiving the notification, transmits a first message indicating the occurrence of the failure to the first other base station device. Upon receiving the first message, the first other base station device releases a connection between itself and the communication device.


The number of reference pixels to be referenced in order to reduce redundancy among color components is to be reduced, while suppressing degradation in encoding performance. An intra prediction unit (20A) that performs intra-frame prediction includes an adaptive-sub-sampling luma reference pixel acquisition unit (21A) and an adaptive-sub-sampling chroma reference pixel acquisition unit (22A). In the case where an input image a is an image of a non-YUV420 format and the encoding unit is the smallest CU block, the adaptive-sub-sampling luma reference pixel acquisition unit (21A) sub-samples reference pixels existing neighboring a luma block corresponding to a chroma prediction target block based on a luma intra prediction mode, and acquires a pixel value of each of the sub-sampled reference pixels. In the case where the input image a is an image of a non-YUV420 format and the encoding unit is the smallest CU block, the adaptive-sub-sampling chroma reference pixel acquisition unit (22A) sub-samples reference pixels existing neighboring the chroma prediction target block based on the luma intra prediction mode, and acquires a pixel value of each of the sub-sampled reference pixels.


A communication apparatus performs communication in a manner such that communication with a first base station apparatus using a first frequency band and communication with a second base station apparatus using a second frequency band are switched on a per-subframe basis, obtains, from the first base station apparatus, specification information that specifies a subframe in which the first frequency band should be used and a subframe in which the second frequency band should be used among a plurality of subframes included in one or more frames, and performs control on the basis of the specification information to communicate with the first base station apparatus in the subframe in which the first frequency band should be used and with the second base station apparatus in the subframe in which the second frequency band should be used.

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