Abstract: Provided is a wireless communication terminal. The wireless communication terminal includes a transceiver configured to transmit and receive a wireless signal and a processor configured to control an operation of the wireless communication terminal. The processor collects data to be transmitted to a plurality of terminals, generates an aggregate-MAC protocol data unit for transmitting data to the plurality of terminals at the same time, and transmits the aggregate-MAC protocol data unit to the plurality of terminals.

Abstract: Disclosed are a method for predicting a current block using a current picture referencing mode (also called intra block copy (ibc) mode), and a video encoding or decoding device therefor. The method comprises: decoding, from a bitstream, an enable flag indicating whether the application of the ibc mode is allowed, and type information indicating whether the type of slices is an inter type; depending on the enable flag and the type information, decoding from the bitstream an ibc flag indicating whether a prediction mode for the current block is the ibc mode; when the ibc flag indicates the ibc mode, decoding motion information from the bitstream; and predicting the current block by using a block indicated by the motion information within a current picture in which the current block is located.

Abstract: Disclosed are an inter-prediction method and an video decoding device. One embodiment of the present invention provides an inter-prediction method executed in an video decoding device, including deriving a motion vector of a current block based on motion information decoded from a bitstream; acquiring reference samples of a first reference block by using the motion vector, wherein reference samples of an external region located outside a reference picture among the first reference block are acquired from a corresponding region corresponding to the external region within the reference picture; and predicting the current block based on the acquired reference samples.

Abstract: Disclosed are a method for predicting a current block using a current picture referencing mode (also called intra block copy (ibc) mode), and a video encoding or decoding device therefor. The method comprises: decoding, from a bitstream, an enable flag indicating whether the application of the ibc mode is allowed, and type information indicating whether the type of slices is an inter type; depending on the enable flag and the type information, decoding from the bitstream an ibc flag indicating whether a prediction mode for the current block is the ibc mode; when the ibc flag indicates the ibc mode, decoding motion information from the bitstream; and predicting the current block by using a block indicated by the motion information within a current picture in which the current block is located.

Abstract: Provided is a wireless communication terminal wirelessly communicating with a base wireless communication terminal. The wireless communication terminal comprises a transceiver and the processor. The processer receives, by using the transceiver, a wireless signal including a trigger frame from the base wireless communication terminal and transmits, by using the transceiver, buffer status information to the base wireless communication terminal based on the trigger frame. The buffer status information is included in a QoS control field which signals information on a QoS control of a MAC header.

Abstract: Disclosed are a method for predicting a current block using a current picture referencing mode (also called intra block copy (ibc) mode), and a video encoding or decoding device therefor. The method comprises: decoding, from a bitstream, an enable flag indicating whether the application of the ibc mode is allowed, and type information indicating whether the type of slices is an inter type; depending on the enable flag and the type information, decoding from the bitstream an ibc flag indicating whether a prediction mode for the current block is the ibc mode; when the ibc flag indicates the ibc mode, decoding motion information from the bitstream; and predicting the current block by using a block indicated by the motion information within a current picture in which the current block is located.

Abstract: Disclosed are a method for predicting a current block using a current picture referencing mode (also called intra block copy (ibc) mode), and a video encoding or decoding device therefor. The method comprises: decoding, from a bitstream, an enable flag indicating whether the application of the ibc mode is allowed, and type information indicating whether the type of slices is an inter type; depending on the enable flag and the type information, decoding from the bitstream an ibc flag indicating whether a prediction mode for the current block is the ibc mode; when the ibc flag indicates the ibc mode, decoding motion information from the bitstream; and predicting the current block by using a block indicated by the motion information within a current picture in which the current block is located.

Abstract: Disclosed are an inter-prediction method and an video decoding device. One embodiment of the present invention provides an inter-prediction method executed in an video decoding device, including deriving a motion vector of a current block based on motion information decoded from a bitstream; acquiring reference samples of a first reference block by using the motion vector, wherein reference samples of an external region located outside a reference picture among the first reference block are acquired from a corresponding region corresponding to the external region within the reference picture; and predicting the current block based on the acquired reference samples.

Abstract: The present invention relates to a wireless communication method for power saving and a wireless communication terminal using the same, and more particularly, to a wireless communication method for efficiently conducting data transmission/reception of each terminal in a high density environment and a wireless communication terminal using the same. To this end, the present invention provides a wireless communication method for a terminal including receiving a distributed access group parameter for data transmission/reception by a group unit, wherein the distributed access group parameter comprises information about a number of groups assigned to a corresponding BSS, obtaining group information about the terminal based on the distributed access group parameter, and performing data transmission based on the obtained group information, and a wireless communication terminal using the same.

Abstract: The present invention relates a wireless communication method and a wireless communication terminal for supporting a spatial reuse operation of an overlapping basic service set to efficiently use a wireless resource. To this end, provided are a base wireless communication terminal including: a processor; and a communication unit, wherein the processor receives a PHY protocol data unit (PPDU) through the communication unit, determines whether the PPDU contains an intra-BSS frame or contains an inter-BSS frame based on preamble information of the PPDU, and performs either a first operation or a second operation distinct from each other according to a determination result and a wireless communication method using the same.

Abstract: a wireless communication method for simultaneously transmitting and receiving of data and a wireless communication terminal using the same, and more particularly, to a wireless communication method and an apparatus thereof which can efficiently perform simultaneous data transmission and reception even in an overlapped BSS environment are provided. A wireless communication method of a terminal includes: performing a backoff procedure for transmitting data; transmitting a first RTS frame when a backoff counter of the backoff procedure is expired; setting a transmission timer for waiting for transmitting the data when a second RTS frame is received in response to the transmitted first RTS frame; and waiting for transmitting the data based on the set transmission timer and a wireless communication terminal using the same.

Abstract: Provided is a wireless communication terminal that communicates wirelessly. The wireless communication terminal includes a transceiver and a processor for processing a radio signal received through the transceiver or a radio signal to be transmitted through the transceiver. The processor accesses a channel according to according to a priority of data to be transmitted to the base communication terminal by the wireless communication terminal.

Abstract: Disclosed is a wireless communication terminal. The wireless communication terminal includes a transceiver transmitting/receiving a wireless signal; and a processor controlling an operation of the wireless communication terminal. The transceiver receives a first frame including information on a manner for accessing, by a plurality of wireless communication terminals including the wireless communication terminal, a base wireless communication terminal. The processor acquires a manner for accessing the base wireless communication terminal on a basis of the first frame. The transceiver accesses the base communication terminal on a basis of the manner for accessing the base wireless communication terminal. The base wireless communication terminal is any one communication terminal different from the plurality of wireless communication terminals.

Abstract: The present invention relates to a wireless communication terminal and a wireless communication method for efficiently scheduling simultaneous uplink transmissions of a plurality of terminals. To this end, provided are a wireless communication terminal, the terminal including: a transceiver; and a processor, wherein the processor receives, through the transceiver, a trigger frame transmitted by a base wireless communication terminal, and performs a multi-user uplink transmission based on the received trigger frame, wherein the trigger frame includes a predetermined field indicating whether an additional trigger frame is present or not, and a wireless communication method using the same.

Abstract: Embodiments relate to a method and a device for switching media service channels, which minimize the time required to detect the first I frame for a switch channel by utilizing a caching server when switching channels in an IP-based media service, such as IPTV, and at the same time, minimize the time required for synchronization by changing time information in caching information transmitted from the caching server, such that channel switching between media service channels can be performed more quickly.

Abstract: Disclosed herein is video encoding or decoding for efficiently encoding video. The techniques of the present disclosure are related to various split shapes of a block, syntaxes representing various split types of blocks, and syntax elements represented at a high level therefor.

Abstract: A wireless communication terminal and wireless communication method for clear channel assessment, and more particularly, to a wireless communication terminal and a wireless communication method for performing an efficient clear channel assessment for spatial reuse of a communication system are provided. The wireless communication terminal comprises: a transceiver configured to transmit and receive a wireless signal; and a processor configured to control an operation of the terminal. The processor is configured to: perform a backoff procedure of a channel for data transmission, suspend the backoff procedure when a wireless signal having a signal strength higher than a predetermined first clear channel assessment (CCA) threshold is received through the channel, identify whether the received wireless signal is a wireless signal of the same basic service set (BSS) as the terminal, and determine whether to resume the backoff procedure based on a CCA threshold determined according to the identification result.

Abstract: Disclosed herein is a method for decoding a video including determining a coding unit to be decoded by block partitioning, decoding prediction syntaxes for the coding unit, the prediction syntaxes including a skip flag indicating whether the coding unit is encoded in a skip mode, after the decoding of the prediction syntaxes, decoding transform syntaxes including a transformation/quantization skip flag and a coding unit cbf, wherein the transformation/quantization skip flag indicates whether inverse transformation, inverse quantization, and at least part of in-loop filterings are skipped, and the coding unit cbf indicates whether all coefficients in a luma block and two chroma blocks constituting the coding unit are zero, and reconstructing the coding unit based on the prediction syntaxes and the transform syntaxes.

Abstract: Provided is a wireless communication terminal that communicates wirelessly. The wireless communication terminal includes: a transceiver; and a processor. The processor receiving trigger information from a base wireless communication terminal using the transceiver, and transmits an Aggregate-MAC Protocol Data Unit (A-MPDU) to the base wireless communication terminal based on the trigger information.

Abstract: The present invention relates to a wireless communication method for simultaneous data transmission and a wireless communication terminal using the same, and more particularly, a wireless communication method in which a plurality of terminals simultaneously transmit data for improving a data throughput in a high density environment, and a wireless communication terminal using the same. To this end, the present invention provides a wireless communication method for a terminal including transmitting a trigger frame indicating simultaneous uplink data transmission of multi-users, receiving uplink data transmitted by a plurality of terminals in response to the trigger frame, and transmitting a block acknowledgement for the plurality of terminals having transmitted the uplink data, and a wireless communication terminal using the same.