Abstract: 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.

Abstract: A video encoder according to the present invention improves coding efficiency of a super high definition video by setting an area of MB size and optimally determining size of the area. A locally decoded image (a) is subjected to frequency analysis in a frequency analyzing unit. Based on the result, an area setting unit sets a local area in a picture to which the maximum MB size is applied. An area boundary correcting unit corrects an area boundary in accordance with a representative motion characteristic, and an N-value calculating unit determines the maximum MB size (N×N) of each area based on a result of encoding a neighboring picture. The area setting and the N-value calculation are performed step by step.

Abstract: It is a purpose of the present invention to provide a video encoding apparatus and a video decoding apparatus which are capable of providing real-time processing having improved coding performance. A video encoding apparatus AA includes an inter-encoding predicted value generating unit 2 configured to receive, as input signals, an input image a, a local decoded value d acquired from an encoded block, prediction direction information e acquired from the encoded block, and interpolation filter initial control information b. The inter-encoding predicted value generating unit 2 includes a filter control unit 21. The filter control unit 21 extracts the tap size N of the interpolation filter and the initial value c0(i,j) of the filter coefficient of the interpolation filter from the interpolation filter initial control information b, and uses the initial value c0(i,j) of the filter coefficient of the interpolation filter as the filter coefficient c(i,j) of the interpolation filter.

Abstract: A cognitive terminal includes different types of radio modules suiting to different types radio media employed by a cognitive base station in the radio communication system. The radio module of the cognitive terminal counts the number of times it receives/transmits ACK/NACK in each unit time. A radio environment cognition unit of the cognitive terminal performs calculations using the count number(s) in consideration of the packet transmission time interval or the time required for repeating a single data packet, thus measuring characteristics of delay time variations in uplink/downlink communication with respect to each radio media. Thus, it is possible for the cognitive terminal to switch over radio media based on ACK/NACK in uplink/downlink communication.

Abstract: The image encoding device includes: signal-to-signal predicting unit 8 for separating an intra-signal prediction residual signal obtained by performing difference processing between an input image signal and an intra-signal prediction signal into a reference signal and a signal to be predicted and calculating signal-to-signal prediction information used for performing signal-to-signal prediction on each pixel of the signal to be predicted corresponding to each pixel of the reference signal; and signal-to-signal compensating unit 9 for obtaining a signal-to-signal prediction signal of the region to be encoded from a decoded intra-signal prediction residual signal and the signal-to-signal prediction information from the signal-to-signal predicting unit, wherein each pixel of the signal to be predicted is encoded by performing orthogonal conversion, quantization, and encoding on the signal-to-signal prediction residual signal obtained by performing the difference processing between the intra-signal prediction re

Abstract: The present invention provides a scene classification apparatus for classifying uncompressed or compressed video into various types of scenes at low cost and with high accuracy using characteristics of a video and audio characteristics accompanied by the video. When video are compressed data, their motion intensity, spatial distribution of motion and histogram of motion direction are detected by using values of motion vectors of predictive coding images existing in respective shots, and the respective shots of the video are classified into a dynamic scene, a static scene, a slow scene, a highlight scene, a zooming scene, a panning scene, a commercial scene and the like based on the motion intensity, the spatial distribution of motion, the histogram of motion direction and shot density.

Abstract: A wireless base station includes: a trend factor regression expression calculator for determining, on the basis of measured wireless communication environment factor, the trend of the variation in the environment factor; a trend prediction value calculator for calculating, on the basis of the determined trend of the variation in the environment factor, the environment prediction value; an irregular variation factor calculator for calculating, on the basis of the difference between the determined trend of the environment factor variation and the measured environment factor, the magnitude of correction to be applied to the environment prediction value; and a radio environment prediction correction unit for correcting the environment prediction value according to the tolerance of the base station for its communication failure risk.

Abstract: There is provided an intra prediction system having high prediction performance and satisfactory encoding efficiency in a pattern image in which pixel value is periodically changed and a pattern image in which pixel value has a constant change tendency like gradation effect. A frequency component extraction unit allows a pixel value of an encoded MB to be made one-dimensional for one-dimensional orthogonal conversion. A frequency component-considering prediction value calculation unit receives, as inputs, a pixel value of an encoded adjacent MB and an alternating current frequency component output to create an orthogonal conversion coefficient. The orthogonal conversion coefficient then is subjected inverted orthogonal conversion (IDCT) to generate a prediction value p(i).

Abstract: A first buffer analyzer receives attribute information (a) of a video signal (A) from a stream buffer (A) to determine an encoded picture type after correction and a generated encoding amount after correction for a switch terminating measure. A second buffer analyzer receives attribute information (b) of a video signal (B) and final buffer-state information after the switch terminating measure from a stream buffer (B) to determine an encoded picture type after correction and a generated encoding amount after correction for a switch starting measure. A re-encoder/re-quantizer (A) and a re-encoder/re-quantizer (B) perform the switch terminating measure and the switch starting measure on the video signals (A) and (B), respectively, based on the correction information from the first and second buffer analyzers.

Abstract: The present invention intends to provide a classification apparatus for broadcasted sport videos for classifying various scenes constituting a sport video, depending on the importance level without being limited to any particular sport video by using visual and audio features. A sport video classification processing portion determines and classifies a play scene, a close-up shot and the like using an audio and a color feature extracted from motion picture data. Because the determination of the most frequent color can be changed adaptively for each inputted sport video, it is not necessary to determine any particular color to the most frequent color previously.

Abstract: A load balance server has a first database for recording a list of identifiers of the presence servers, a second database for recording a subscription message receiving rate, an entry retrieval means for selecting a presence server that the subscription message receiving rate is lowest, in presence servers included in the list of the entry based on the presence information, a presence server selecting means for selecting an additional presence server whichever subscription message receiving rate is lower than predetermined threshold Ts, when the subscription message receiving rate in the selected presence server is higher than predetermined threshold Ts, and a message sending/receiving control means for sending the public message to the selected presence server.

Abstract: A method and a management apparatus for classifying congestion paths based on packet delay in a plurality of paths between measurement nodes. The method and the apparatus specify the short-time congestions based on packet delay in Internet Protocol network.

Abstract: It is made possible to concretely estimate actual transmission bit rate in a frame of grasping a line state by using a report packet. Together with media packets encoded by a video encoder 1 and an audio encoder 2, a sender report packet generated by a sender report generation section 3 is sent to the transmission line. A receiver report packet is fed back from the receiver side. Each of the sender report packet and the receiver report packet includes report packets of two kinds differing in size. A rate estimation section 4 estimates transmission bit rate on the basis of round-trip delay time for the sender report packet and the receiver report packet each having a small size and round-trip delay time for the sender report packet and the receiver report packet each having a large size.

Abstract: A wireless base station includes: a trend factor regression expression calculator for determining, on the basis of measured wireless communication environment factor, the trend of the variation in the environment factor; a trend prediction value calculator for calculating, on the basis of the determined trend of the variation in the environment factor, the environment prediction value; an irregular variation factor calculator for calculating, on the basis of the difference between the determined trend of the environment factor variation and the measured environment factor, the magnitude of correction to be applied to the environment prediction value; and a radio environment prediction correction unit for correcting the environment prediction value according to the tolerance of the base station for its communication failure risk.

Abstract: A plurality of nodes each including a transmitter, a receiver, and a controller is linked together via a network. The transmitter of a transmission node using multiple wireless interfaces sends a beacon message sending its own node identifier and wireless interfaces to at least one reception node, which in turn sends back a response message sending its own node identifier and at least one usable wireless interface. The controller of the transmission node determines the broadcast order based on the response message received by the receiver. The transmitter of the transmission node performs broadcasting or multicasting using the wireless interface, which is selected based on the broadcast order. Thus, it is possible to perform broadcasting or multicasting at an efficient usage of radio frequency while covering all reachable neighboring nodes in node-to-node wireless communications based on multiple wireless communication methods.

Abstract: The present invention provides a quantization control system for video coding, for optimizing bit allocation based on visual priority which expresses at high precision human visual characteristics for videos, thereby improving subjective image quality of the whole image even with a limited number of bits. An object is extracted from a picture of an input image (S1) and a gaze parameter V(j) for the extracted object is calculated (S2). Then, a texture attribute parameter t(k) of each macroblock included in the object is calculated (S3). The gaze parameter V(j) and texture attribute parameter t(k) are used to calculate a visual priority parameter w(k) for each macroblock. Based on this parameter w(k), a quantization parameter is determined.

Abstract: A content display system is disclosed for offering, excellent multimedia content browsing/viewing environments to handheld device users, from a server of a communication network, by the use of a handheld device and a cooperating computer device cooperated to the handheld device.

Abstract: The present invention provides a radio channel assignment method where each node in a network assigns radio channels to respective radio links in a decentralized manner without inconsistency. The radio channel assignment method includes a step of assigning one of a pair of nodes terminating each radio link and the other thereof to an upper side and a lower side (Step S1), and a step that each radio node located to the upper side from at least one of radio links terminating at an own node assigns a frequency slot different from that of an adjacent link to a radio link locating an own node to the upper side (Step S5).

Abstract: An apparatus for simultaneous OTDM demultiplexing, electrical clock recovery and optical clock generation, and optical clock recovery using a traveling-wave electroabsorption modulator. The apparatus includes a TW-EAM and a PLL coupled thereto. The TW-EAM includes a first, a second, a third, and a fourth. The first port is used for an optical input and the third port is used for optical output. The second port is coupled to an input, and the fourth port is coupled to an output, of the PLL. When the first port receives optical input, the second port produces a photocurrent to be applied to the PLL, and the fourth port receives a recovered clock produced by the PLL, and the third port produces demultiplexed data and an optical clock. Using the same configuration, the apparatus produces a recovered optical clock signal.

Abstract: An apparatus for simultaneous OTDM demultiplexing, electrical clock recovery and optical clock generation, and optical clock recovery using a traveling-wave electroabsorption modulator. The apparatus includes a TW-EAM and a PLL coupled thereto. The TW-EAM includes a first, a second, a third, and a fourth. The first port is used for an optical input and the third port is used for optical output. The second port is coupled to an input, and the fourth port is coupled to an output, of the PLL. When the first port receives optical input, the second port produces a photocurrent to be applied to the PLL, and the fourth port receives a recovered clock produced by the PLL, and the third port produces demultiplexed data and an optical clock. Using the same configuration, the apparatus produces a recovered optical clock signal.