Lg Electronics Inc.

Kyuwoon Kim

Moonmo Koo

Sehoon Yea

Bumshik Lee

Jin Seong Heo

Eunyong Son

Jaehyun Lim

Junghak Nam

Byeongmoon Jeon

Naeri Park

Seungwook Park

Sangoh Jeong

Hyunsoo Kim

Jungdong Seo

Joonwon Bhang

The present invention provides a method of decoding a video signal using graph-based transform comprising the steps: extracting prediction unit partition information of a current coding unit from the video signal; obtaining a graph-based transform kernel from predetermined table information based on the prediction unit partition information; and performing an inverse-transform of a transform unit using the graph-based transform kernel, wherein the graph-based transform kernel corresponds to at least one of the prediction unit partition information and an edge weight, and the edge weight is a predetermined value representing a correlation between pixels.

Method and apparatus for processing video signal using graph-based transform

The present invention provides a method for encoding a video signal comprising the steps of: performing block division with respect to a target unit of the video signal, wherein the block division is performed on the basis of square division and/or non-square division; determining the optimal block partition on the basis of a rate distortion cost, when the target unit is divided into a plurality of non-square blocks; and performing CNT prediction coding on the non-square blocks resulting from the optimal block partition, wherein the CNT prediction coding involves performing prediction using all previously decoded pixel values.

Method for encoding and decoding video signal, and apparatus therefor

An inter prediction method according to the present invention, which is performed by a decoding apparatus, comprises the steps of: acquiring prediction-related information and residual information from a received bitstream; performing inter prediction on a current block on the basis of the prediction-related information so as to generate prediction samples; generating a list of Wiener filter candidates on the basis of spatially neighboring blocks of the current block, and deriving Wiener filter coefficients for the current block on the basis of candidate blocks in the list of the Wiener filter candidates; filtering the prediction samples on the basis of the derived Wiener filter coefficients; deriving residual samples for the current block on the basis of the residual information; and generating a reconstructed picture on the basis of the filtered prediction samples and the residual samples. The present invention can reduce the amount of data for a residual signal and improve coding efficiency.

Filtering method and apparatus for improving prediction in image coding system

The present invention provides a method for processing a video signal, comprising generating a prediction block for a neighbor block using a reconstructed reference pixel of the neighbor block when the neighbor block adjacent to a current block is intra-coded; determining a refined intra prediction mode of the neighbor block based on the prediction block, where the refined intra prediction mode represents a mode which minimizes an error between the prediction block and a reconstructed neighbor block; generating a prediction mode candidate list for the current block based on the refined intra prediction mode; selecting an intra prediction mode for the current block from the prediction mode candidate list; and performing a prediction for the current block based on the intra prediction mode.

Method and apparatus for encoding and decoding video signal

The present invention provides a method for encoding a video signal comprising the steps of: obtaining activity information from the video signal, wherein the activity signal indicates information relating to edge characteristics of an image and includes edge orientation information and/or edge level information; determining conditionally non-linear transform (CNT) configuration information on the basis of the activity information; and performing CNT prediction coding on the basis of the CNT configuration information, wherein the CNT prediction coding involves performing prediction using all previously decoded pixel values.

Method for encoding and decoding video signal

The present invention provides a method for decoding a video signal by using a graph-based transform, comprising the steps of: parsing a transform index from the video signal; generating a line graph on the basis of edge information on a target unit; aligning transform vectors for each of segments of the line graph on the basis of a transform type corresponding to the transform index; acquiring a transform kernel by realigning the transform vectors for each of segments of the line graph according to a predetermined condition; and performing an inverse transform for the target unit on the basis of the transform kernel.

Method and device for processing video signal by using separable graph-based transform

An apparatus for controlling depth/distance of sound and method thereof are disclosed, by which an audio signal can be outputted to correspond to a depth of an image, i.e., a disparity in displaying a stereoscopic image. The present invention includes extracting at least one object from an image, measuring a depth change value in accordance with a motion of the object within the image, and changing a depth/distance level of the sound based on the depth change value of the object.

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Seoul, South Korea

Kyuwoon Kim