Abstract: Disclosed are a video signal processing method and device whereby a video signal is encoded or decoded. The video signal processing method may comprise the steps of: determining whether an intra sub-partition (ISP) mode is applicable to a current block; if the ISP mode is applicable to the current block, splitting the current block into a plurality of rectangular transform blocks in the horizontal or vertical direction; generating prediction blocks of the transform blocks by carrying out intra prediction on each of the transform blocks; and reconstructing the current block on the basis of residual blocks of the transform blocks, and the prediction blocks.

Abstract: A video signal processing device includes a processor. The 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: 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 may perform operations of determining whether a coding tree block is divided into a plurality of blocks; determining whether an upper boundary of a current block is adjacent to an upper boundary of the coding tree block, determining a first intra prediction mode for prediction of the current block based on whether the upper boundary of the current block is adjacent to the upper boundary of the coding tree block, reconstructing the current block based on the first intra prediction mode.

Abstract: A video signal processing method may include: a step for determining whether a secondary inverse transform is applied to the current block; a step for deriving a secondary transform kernel set which is applied to the current block from among predefined secondary transform kernel sets on the basis of an intra prediction mode of the current block when the secondary inverse transform is applied to the current block; a step for selecting a secondary transform kernel, which is applied to the current block, in the selected secondary transform kernel set; a step for generating a secondary inverse transformed block by performing a secondary inverse transform on a specified upper-left region of the current block by using the secondary transform kernel; and a step for generating a residual block of the current block by performing a primary inverse transform on the secondary inverse transformed block.

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 method for processing a video signal comprises the steps of: obtaining, from the video signal, an intra sub-partitions (ISP) mode flag indicating whether the ISP mode is applied to a current block; when the ISP mode is applied to the current block, obtaining, from the video signal, an ISP partitioning flag indicating a partitioning direction of the current block; partitioning the current block into a plurality of transform blocks on the basis of the partitioning direction; generating residual blocks of the transform blocks by performing an inverse transformation on each of the transform blocks; and restoring the current block on the basis of the residual blocks.

Abstract: A video signal decoding apparatus comprising a processor, wherein the processor is configured to: parse a syntax element related to a secondary transform of a coding unit from a bitstream of a video signal when one or more preset conditions are satisfied; check whether or not the secondary transform is applied to a transform block included in the coding unit based on the parsed syntax element; obtain one or more inverse transform coefficients for a first sub-block by performing an inverse secondary transform based on one or more coefficients of the first sub-block which is one of one or more sub-blocks constituting the transform block when the secondary transform is applied to the transform block; and obtain a residual sample for the transform block by performing an inverse primary transform based on the one or more inverse transform coefficients.

Abstract: Disclosed is a video signal processing method comprising the steps of: obtaining at least one transform block for a residual signal of a current block from a video signal bitstream; determining, on the basis of length information of a first side of the transform block, a horizontal transform kernel for horizontal transformation of the transform block, regardless of the length of a second side of the transform block, which is orthogonal to the first side; determining, on the basis of length information of the second side, a vertical transform kernel for vertical transformation of the transform block, regardless of the length of the first side; obtaining the residual signal of the current block by performing, on the transform block, inverse transformation using the horizontal transform kernel and the vertical transform kernel; and reconstructing the current block on the basis of the obtained residual signal.

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: An apparatus for decoding a video signal, the apparatus comprising a processor, wherein the processor is configured to: configure a Motion Vector Prediction (MVP) candidate list for motion compensation of a current block through one of a first method and a second method, acquire a motion vector predictor of the current block, based on the configured MVP candidate list, acquire a motion vector differential value indicating a difference between a motion vector of the current block and the motion vector predictor, modify the motion vector differential value, based on a resolution of the motion vector differential value of the current block, acquire the motion vector of the current block, based on the motion vector predictor and the modified motion vector differential value, and reconstruct the current block, based on the acquired motion vector.

Abstract: A video signal processing method may comprise the steps of: confirming a prediction mode applied to a current coding unit; confirming whether a plurality of preset conditions are satisfied on the basis of at least one of the prediction mode of the current coding unit and a size of the current coding unit; parsing a first syntax element indicating a transform kernel applied to a transform unit included in the current coding unit when the plurality of preset conditions are satisfied; determining a transform kernel applied to horizontal and vertical directions of the current transform unit on the basis of the first syntax element; and generating a residual signal of the current transform unit by performing an inverse transform on the current transform unit using the determined transform kernel.

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

Abstract: A video signal processing method comprises: obtaining, from a bitstream, a skip parameter (cu_skip_flag) indicating whether a skip mode is applied to a current block; when the skip parameter indicates that a mode is not the skip mode, obtaining, from the bitstream, a merge parameter (merge_flag) indicating whether the current block is coded with a merge mode; and determining whether a coded block flag (CBF) parameter (cu_cbf), which indicates whether a syntax element related to transform is obtained from the bitstream, is obtained, according to a value of the merge parameter, wherein, when the value of the merge parameter indicates the merge mode, the CBF parameter is not obtained from the bitstream and is determined to be a preconfigured value.

Abstract: A video signal processing method may comprise the steps of: acquiring a first syntax element indicating whether a subblock-based merging mode is applied to a current block; acquiring a second syntax element indicating whether a merging mode using motion vector difference is applied to the current block, when the first syntax element indicates that the subblock-based merging mode is not applied to the current block; and acquiring a third syntax element indicating a candidate to be used in inter-prediction for the current block, among candidates contained in a mergence candidate list for the current block, when the second syntax element indicates that the merging mode using motion vector difference is applied to the current block.

Abstract: A video signal processing method comprises the steps of: acquiring reference samples on a first side of a current block and reference samples on a second side thereof on the basis of pre-restored samples neighboring the current block; acquiring a direct current (DC) value for a prediction of the current block on the basis of a reference sample set composed of at least some of the reference samples on the first side and the reference samples on the second side, wherein the reference sample set includes the number of reference samples raised to a power of 2, obtained by excluding some of the reference samples on the first side and the reference samples on the second side, if the length of the first side and the length of the second side are different; and restoring the current block on the basis of the DC value.

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: An apparatus for decoding a video signal, the apparatus comprising a processor, wherein the processor is configured to: configure a Motion Vector Prediction (MVP) candidate list for motion compensation of a current block through one of a first method and a second method, acquire a motion vector predictor of the current block, based on the configured MVP candidate list, acquire a motion vector differential value indicating a difference between a motion vector of the current block and the motion vector predictor, modify the motion vector differential value, based on a resolution of the motion vector differential value of the current block, acquire the motion vector of the current block, based on the motion vector predictor and the modified motion vector differential value, and reconstruct the current block, based on the acquired motion vector.

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: An apparatus and method for providing various audio environments in a multimedia content playback system are disclosed. The content processing terminal of the multimedia content playback system includes an audio signal processor for processing the audio source of multimedia content to produce a voice source and a background source, a controller for controlling the audio signal processor to adjust at least one of the voice source and the background source in accordance with a volume control signal, a GUI processor for acquiring a graphical user interface (GUI) component corresponding to the volume control signal, and a display processor for processing the GUI component and providing the processed GUI component to a display device.