Abstract: Disclosed are a video signal processing method and apparatus for encoding or decoding a video signal. In more detail, the video signal processing method includes receiving intra prediction mode information for a current block, wherein the intra prediction mode information indicates one of a plurality of intra prediction modes configuring an intra prediction mode set; and decoding the current block based on the received intra prediction mode information, wherein the intra prediction mode set comprises a plurality of angle modes, and the plurality of angle modes comprises a basic angle mode and an extended angle mode, wherein the extended angle mode is signaled based on the basic angle mode.

Abstract: A method for constructing an aggregated frame for efficient wireless communication in a high-density environment and a wireless communication method using the same may perform operations comprising generating an aggregated MPDU (A-MPDU) including a plurality of MAC protocol data unit (MPDU) groups to which independent modulation and coding schemes (MCSs) are applied, respectively; and transmitting the generated A-MPDU through the transceiver.

Abstract: Provided are a wireless communication terminal including: a processor; and a communication unit, wherein the processor obtains a backoff counter for an OFDMA-based random access of the terminal, wherein the backoff counter is obtained within a range of a contention window for the uplink OFDMA-based random access, receives a trigger frame indicating an uplink multi-user transmission, when one or more resource unit(s) in which random access can be performed is indicated by the trigger frame, decrements the backoff counter based on a number of resource units(s) in which random access can be performed, and when the backoff counter is 0 or decremented to 0, performs an uplink multi-user transmission through a selected resource unit among the resource units(s) and a wireless communication method using the same.

Abstract: A method for processing a video signal, of the present disclosure, comprising the steps of: parsing, from a bitstream, upper level merge with MVD (MMVD) activation information (sps_mmvd_enabled_flag) indicating whether the upper level MMVD including a current block is usable; parsing, from the bitstream, MMVD merge information (mmvd_merge_flag) indicating whether the MMVD is used in the current block, if the upper level MMVD activation information indicates the activation of the MMVD; parsing MMVD distance-related information (mmvd_distance_idx) and MMVD direction-related information (mmvd_direction_idx), if the MMVD merge information indicates that the MMVD is used in the current block; and obtaining MMVD information (mMvdLX) based on the MMVD distance-related information and the MMVD direction-related information, wherein the MMVD information is greater than or equal to ?2{circumflex over (?)}17 and is less than or equal to 2{circumflex over (?)}17?1.

Abstract: A video signal processor is configured to obtain a secondary transform kernel for a current block based on an intra prediction mode of the current block to which a secondary transform is applied, to obtain a secondary inverse transformed block by performing a secondary inverse transform on a top-left specific region of the current block using the secondary transform kernel, wherein the secondary inverse transform is an inverse transform of the secondary transform, and the secondary transform is a low frequency non-separable transform, to obtain a residual block of the current block by performing a primary inverse transform on the secondary inverse transformed block, wherein one or more coefficients of the top-left specific region of the current block are derived in a preset scan order and the preset scan order is a 4×4 up-right diagonal scan order regardless of a size of the current block.

Abstract: The present invention relates to a channel access method for data transmission, and a wireless communication method and a wireless communication terminal using the same, and more particularly, to a wireless communication method and a wireless communication terminal for efficiently scheduling data transmissions of a plurality of terminals. To this end, provided are a wireless communication terminal comprising a processor and a transceiver, wherein the processor receives a trigger frame indicating an uplink multi-user transmission, and transmits an uplink multi-user PLCP protocol data unit (PPDU) in response to the received trigger frame, wherein the trigger frame and a non-legacy preamble of the uplink multi-user PPDU contains remaining transmission opportunity (TXOP) time information of a current TXOP and a wireless communication method using the same.

Abstract: Disclosed is a method for receiving data by a terminal in a wireless communication system. The terminal may receive a physical protocol data unit (physical layer protocol data unit: PPDU) from an access point (APAP) and decode the received PPDU. The PPDU may include a universal signal (U-SIG) field and an extremely high throughput (EHT)-SIG field including at least one content channel, and the U-SIG field may include a bandwidth field indicating the total bandwidth via which the PPDU is transmitted. The total bandwidth is divided into at least one segment, and at least one of field among same fields includes same information except for a resource unit allocation (RU allocation) field between a first content channel and a second content channel in the same segment among the at least one segment when the at least one content channel is composed of a first content channel and a second content channel.

Abstract: An access point (AP) which wirelessly communicates with a non-AP station is disclosed. The AP comprises a transceiver and a processor. The processor uses the transceiver to transmit a trigger frame including a User Info field indicating (addressing) the non-AP station and to receive a trigger-based (TB) physical layer protocol data unit (PPDU) from the non-AP station. The TB PPDU is transmitted on the basis of the User Info field of the trigger frame.

Abstract: Disclosed is a video signal processing method and device for encoding or decoding a video signal.

Abstract: Provided is a wireless communication terminal that communicates wirelessly. The terminal includes: a transceiver; and a processor. The terminal includes a transceiver, and a processor. The processor is configured to receive an Aggregate-MAC Protocol Data Unit (A-MPDU) from an originator using the transceiver, and when receiving all MPDUs included in the A-MPDU, transmit to the originator a block ACK (BA) frame signaling that all MPDUs included in the A-MPDU are received without a bitmap indicating whether each MPDU included in the A-MPDU is received.

Abstract: Provided are a wireless communication terminal including: a processor; and a communication unit, wherein the processor obtains a backoff counter for an OFDMA-based random access of the terminal, wherein the backoff counter is obtained within a range of a contention window for the uplink OFDMA-based random access, receives a trigger frame indicating an uplink multi-user transmission, when one or more resource unit(s) in which random access can be performed is indicated by the trigger frame, decrements the backoff counter based on a number of resource units(s) in which random access can be performed, and when the backoff counter is 0 or decremented to 0, performs an uplink multi-user transmission through a selected resource unit among the resource units(s) and a wireless communication method using the same.

Abstract: Disclosed is a video signal processing method comprising the steps of: acquiring a merge index which indicates a candidate for prediction of a current block among a plurality of candidates for the prediction of the current block, which are included in a merge candidate list; acquiring motion information of the current block on the basis of motion information corresponding to the candidate indicated by the merge index; when the motion information of the current block includes a plurality of motion vectors corresponding to a list of different reference pictures, comparing picture order count (POC) differences between each of the reference pictures corresponding to the plurality of motion vectors and the current picture including the current block; correcting the plurality of motion vectors on the basis of a result of the comparison; and reconstructing the current block on the basis of the plurality of corrected motion vectors.

Abstract: A video signal processing method and device for encoding or decoding a video signal are disclosed. The video signal processing method comprises the steps of: identifying a tree type of a current chroma block; deriving a chroma intra prediction mode of the current chroma block on the basis of a luma intra prediction mode at a preset position if the tree type of the current chroma block is a dual tree; generating a prediction block of the current chroma block on the basis of the chroma intra prediction mode; and restoring the current chroma block by adding a residual block of the current chroma block to a prediction block, wherein the luma intra prediction mode can be set to a preset mode if the luma prediction mode at the preset position is an intra block copy mode.

Abstract: Provided is a wireless communication terminal. The wireless communication terminal includes a transceiver, and a processor. The processor is configured to receive a signaling field of a first PLCP Protocol Data Unit (PPDU) through the transceiver, and access a channel based on information identifying a Basic Service Set (BSS) indicated by the signaling field.

Abstract: A video signal processing method and device for encoding or decoding a video signal are disclosed. The video signal processing method comprises the steps of: identifying a tree type of a current chroma block; deriving a chroma intra prediction mode of the current chroma block on the basis of a luma intra prediction mode at a preset position if the tree type of the current chroma block is a dual tree; generating a prediction block of the current chroma block on the basis of the chroma intra prediction mode; and restoring the current chroma block by adding a residual block of the current chroma block to a prediction block, wherein the luma intra prediction mode can be set to a preset mode if the luma prediction mode at the preset position is an intra block copy mode.

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: The present invention provides a channel switching method and device, the method performed by a multi-link device (MLD) comprising a plurality of stations, which respectively operate in a plurality of links, in a wireless communication system. Particularly, the MLD of the present invention may: receive a frame comprising channel switching information for channel switching from a first AP of a primary link from among the plurality of links; and determine whether or not channel switching is to be performed for a station connected to a second AP by means of a subsidiary link, on the basis of the channel switching information.

Abstract: A method for processing a video signal, of the present disclosure, comprising the steps of: parsing, from a bitstream, upper level merge with MVD (MMVD) activation information (sps_mmvd_enabled_flag) indicating whether the upper level MMVD including a current block is usable; parsing, from the bitstream, MMVD merge information (mmvd_merge_flag) indicating whether the MMVD is used in the current block, if the upper level MMVD activation information indicates the activation of the MMVD; parsing MMVD distance-related information (mmvd_distance_idx) and MMVD direction-related information (mmvd_direction_idx), if the MMVD merge information indicates that the MMVD is used in the current block; and obtaining MMVD information (mMvdLX) based on the MMVD distance-related information and the MMVD direction-related information, wherein the MMVD information is greater than or equal to ?2{circumflex over (?)}17 and is less than or equal to 2{circumflex over (?)}17?1.

Abstract: A non-access point (AP) multi-link device operating in a first link and a second link is disclosed. The non-AP multi-link device comprises a transmission/reception unit and a processor. The processor receives a beacon frame or a probe response frame from an AP multi-link device operating in the first link and the second link, determines a traffic identifier (TID) mapped to the first link and the second link according to TID-to-Link mapping indicated by the beacon frame or the probe response frame, and performs transmission in the first link or the second link according to the TID mapped to the first link and the second link.

Abstract: The present invention relates to 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.