Panasonic Intellectual Property Corporation of America

Provided is an encoder (100) includes: circuitry (160); and memory (162), in which the circuitry (160): determines which mode is used to perform a prediction process, among modes including a first mode in which the prediction process is performed based on a motion vector of each block in a video and a second mode in which the prediction process is performed based on a motion vector of each sub-block obtained by splitting the block; when the prediction process is performed in the first mode, determines whether to perform a correction process on a prediction image using a spatial gradient of pixel values in the prediction image obtained by performing the prediction process, and performs the correction process when it is determined to perform the correction process; and when the prediction process is performed in the second mode, does not perform the correction process.

The present disclosure relates to methods and apparatuses for intra prediction that serves for reconstructing an image block of an image or video. The intra prediction comprises determining an intra-prediction mode for predicting the image block. When the intra-prediction mode is one of a set of decoder-derived prediction modes, the intra prediction comprises (a) determining one or more prediction directions from already reconstructed pixels of the image; and (b) obtaining a prediction block of the image block by performing an intra prediction which, irrespectively of the one or more prediction directions, (i) comprises application of a direction-based extrapolation according to the one or more prediction directions and based on one or more reference pixels that are pixels adjacent to the image block; and (ii) does not comprise a matrix multiplication with matrices based on the one or more prediction directions. The set of decoder-derived prediction modes includes a first mode based on performing edge detection at individual reference pixel positions adjacent to the image block.

Communication devices and methods for multi-link secured retransmissions are provided. One exemplary embodiment provides a multi-link device (MLD) configured to operate with a first plurality of affiliated STAs, comprising: circuitry, which in operation, sets up a robust security network association (RSNA) with a second MLD that is configured to operate with a second plurality of affiliated STAs, wherein two or more links have been established between STAs of the first plurality of affiliated STAs and corresponding STAs of the second plurality of affiliated STAs, wherein the circuitry constructs an Additional Authentication Data (AAD) and a Nonce that are used for cryptographical encapsulation of a MAC protocol data unit (MPDU) to form an encapsulated MPDU, wherein the AAD includes an Address 1 (A1) field, an Address 2 (A2) field, an Address 3 (A3) field and a Sequence Control (SC) field, and the Nonce includes an Address 2 (A2) field, wherein the SC field of the AAD is based on a SC field of the MPDU, and a transmitter, which in operation, transmits the encapsulated MPDU to the second MLD on a first link as an initial transmission, and upon failure of the initial transmission, retransmits the encapsulated MPDU on a second link without reperforming the cryptographical encapsulation.

A base station equipped with: a receiver circuit that receives control information pertaining to sharing channel state information during coordinated communication between base stations; and a control circuit that, on the basis of the control information, controls the transmission of the channel state information to another base station.

Provided are a user equipment, base station and wireless communication methods related to uplink control information mapping in physical uplink resources in NR (New Radio access technology). A user equipment comprises: circuitry operative to map, in physical resource blocks (PRBs) for Physical Uplink Shared Channel (PUSCH), Uplink Control Information (UCI) to one or more available resource elements according to their distances with resource elements where reference signals are mapped in one or more of time domain, frequency domain and spatial domain; and a transmitter operative to transmit the UCI and the reference signals in PUSCH on the PRBs to a base station.

The present invention appropriately controls settings of feedbacks to a plurality of transmission sources. This wireless communication device comprises: a reception circuit for receiving a plurality of wireless signals transmitted by a plurality of transmission sources; and a control circuit for controlling settings of feedbacks with respect to the plurality of radio signals, depending on differences in reception quality of the plurality of wireless signals.

The present invention provides a terminal that can carry out a random-access process appropriately. A terminal (100) is provided with: a wireless transmission unit (108) that transmits a data signal; and a control unit (101) that determines a second resource for use in transmitting the data signal on the basis of a first resource for use in transmitting a preamble signal.

A three-dimensional data encoding method includes: calculating coefficient values from pieces of attribute information of three-dimensional points included in point cloud data (S7091); quantizing the coefficient values individually to generate quantized values (S7092); and generating a bitstream including the quantized values (S7093). Each of the coefficient values belongs to any one of layers. In the quantizing (S7092), each of the coefficient values is quantized using a quantization parameter for a layer to which the coefficient value belongs among the layers, and the bitstream includes first information and pieces of second information, the first information indicating a reference quantization parameter, the pieces of second information being for calculating quantization parameters for the layers from the reference quantization parameter.

Provided is an Internet of Things, loT, device associated with a first device identifier unique among a plurality of device identifiers associated with a respective plurality of loT devices, wherein the loT device is included in a group associated with a group identifier, comprising a transceiver which, in operation, receives a first message from a communication node, indicating the group identifier; and circuitry which, in operation, determines a second device identifier, the second device identifier having a smaller data size than the first device identifier, wherein the transceiver, in operation, transmits a second message indicating the second device identifier to the communication node.

Provided is an Internet of Things, loT, device, comprising a transceiver which, in operation, receives a first message, the first message indicating group authentication data common to a group including the loT device; and circuitry which, in operation, performs authentication by determining whether or not a communication node is authenticated using the group authentication data, and determining device authentication data specific to the loT device, if it is determined that the communication node is authenticated, wherein the transceiver, in operation, transmits a second message indicating the device authentication data.