109results about How to "Improve encoding/decoding efficiency" patented technology

According to the present invention, an inter prediction method comprises the steps of: generating a merge candidate list for a block to be predicted, wherein the block is to correspond to a current prediction unit; deriving, on the basis of one of a plurality of merge candidates constituting the merge candidate list, motion information on the block to be predicted; and performing, on the basis of the derived motion information, a prediction on the block to be predicted so as to generate a prediction block corresponding to the current prediction unit.

A method for encoding / decoding high-resolution image and a device for performing the same set the size of an extended macro-block as the size of a prediction unit to be encoded, according to a temporal frequency feature or a spatial frequency feature found therebetween at least one picture to be encoded, perform motion prediction and motion compensation using the set prediction unit size unit, and perform the conversion thereof. Also, a macro-block having 32×32 pixel or 64×64 pixel size is divided into at least one partition based on an edge, and encoding is performed on each of the divided partitions afterwards. Therefore, encoding efficiency for high definition (HD) or higher resolution images is enhanced.

An image decoding method according to the present invention includes: obtaining motion information of a current block, specifying a reference block of the current block within a reference picture on the basis of the motion information, and generating a prediction block of the current block from the reference block.

The present invention relates to an image encoding / decoding method. The image decoding method includes splitting a coding tree unit (CTU) into at least one coding unit (CU) according to a block splitting structure and performing CU-based decoding, in which the block partition structure is configured such that at least one of binary tree splitting and ternary tree splitting is performed after quadtree splitting is performed.

The present invention relates to an encoding method and decoding method, and a device using the same. The encoding method according to the present invention comprises the steps of: specifying an intra prediction mode for a current block; and scanning a residual signal by intra prediction of the current block, wherein the step of scanning the residual signal can determine a scanning type for a luminance signal and a chroma signal of the current block according to an intra prediction mode for a luminance sample of the current block.

The present invention relates to a method and apparatus for encoding and decoding a video image based on transform. The method for decoding a video includes: determining a transform mode of a current block; inverse-transforming residual data of the current block according to the transform mode of the current block; and rearranging the inverse-transformed residual data of the current block according to the transform mode of the current block, wherein the transform mode includes at least one of SDST (Shuffling Discrete Sine Transform), SDCT (Shuffling Discrete cosine Transform), DST (Discrete Sine Transform) or DCT (Discrete Cosine Transform).

The present invention relates to a method and an apparatus for transform-based image encoding / decoding. The image decoding method according to the present invention comprises: a step of determining atransform mode of a current block; a step of inversely transforming residual data of the current block according to the transform mode of the current block; and a step of rearranging the residual dataof the current block inversely transformed according to the transform mode of the current block, wherein the transform mode may include at least one of a shuffling discrete sine transform (SDST), a shuffling discrete cosine transform (SDCT), a discrete sine transform (DST) and a discrete cosine transform (DCT).

The present invention relates to a method for carrying out motion compensation using motion vector prediction. An image decoding method therefor may comprise the steps of: acquiring a residual signalquantized for the current block; inverse-quantizing the quantized residual signal; and determining a transformation scheme for inverse-transforming the residual signal. The inverse transformation comprises a primary transformation and secondary transformation, and at least one from among a primary transformation scheme and secondary transformation scheme can be derived from a reconstructed block,around the current block, for which decoding is complete.

A method for encoding / decoding high-resolution image and a device for performing the same set the size of an extended macro-block as the size of a prediction unit to be encoded, according to a temporal frequency feature or a spatial frequency feature found therebetween at least one picture to be encoded, perform motion prediction and motion compensation using the set prediction unit size unit, and perform the conversion thereof. Also, a macro-block having 32×32 pixel or 64×64 pixel size is divided into at least one partition based on an edge, and encoding is performed on each of the divided partitions afterwards. Therefore, encoding efficiency for high definition (HD) or higher resolution images is enhanced.

According to the present invention, there is provided a method of decoding a video signal, the method including: determining an intra prediction mode of a current block; applying a filter to a first reference sample adjacent to the current block; obtaining a first prediction sample of the current block on the basis of the intra prediction mode and a second reference sample obtained by applying the filter; and obtaining a second prediction sample of the current block using the first prediction sample and the first reference sample.

A method for encoding / decoding high-resolution image and a device for performing the same set the size of an extended macro-block as the size of a prediction unit to be encoded, according to a temporal frequency feature or a spacial frequency feature found therebetween at least one picture to be encoded, perform motion prediction and motion compensation using the set prediction unit size unit, and perform the conversion thereof. Also, a macro-block having 32×32 pixel or 64×64 pixel size is divided into at least one partition based on an edge, and encoding is performed on each of the divided partitions afterwards. Therefore, encoding efficiency for high definition (HD) or higher resolution images is enhanced.

A video signal processing method according to the present invention is characterized by obtaining at least one palette entry of a current block from a palette map of a previous block, constructing a palette map of a current block including the obtained palette entry, deriving a palette index in a unit of a sample of a current block, and reconstructing a current block by using a palette map of a current block and a palette index.

The invention discloses a video encoding method and apparatus and an associated video decoding method and apparatus. A method of encoding a frame to generate an output bitstream has following steps: dividing the frame into partitions; dividing each of the partitions into blocks, wherein each of the blocks is composed of pixels; assigning a first segmentation identifier to each of first blocks located at partition boundaries each between two adjacent partitions within the frame, wherein the first blocks belong to a first segment, and the first segmentation identifier is signaled per first block; and encoding each of the blocks. The step of encoding each of the blocks includes: generating reconstructed blocks for the blocks, respectively; and configuring an in-loop filter by a predeterminedin-loop filtering setting in response to the first segmentation identifier, wherein the in-loop filter with the predetermined in-loop filtering setting does not apply in-loop filtering to each reconstructed block corresponding to the first segment.

A method of decoding a video signal according to the present invention may include: determining whether or not change in brightness is present between a current video including a current block and a reference video of the current video; when it is determined that change in brightness is present between the current video and the reference video, determining weight prediction parameter candidates of the current block; determining a weight prediction parameter of the current block on the basis of index information specifying any of the weight prediction parameter candidates; and performing prediction for the current block on the basis of the weight prediction parameter.

A video signal processing method according to the present invention is characterised by constructing a palette map for a current block that is encoded in a palette mode; inducing a palette index for each sample of the current block in a pre-determined scan order; and restoring the respective samples of the current bock based on the palette map and the palette index.

A video signal processing method according to the present invention is characterized by constructing a palette map relating to a current block encoded in a palette mode, deriving a number of palette indices encoded according to an index mode (INDEX MODE), determining palette index relating to the current block based on the derived number of palette indices, and reconstructing the current block based on the palette map and the palette index.

The invention discloses a video encoding and decoding method based on surface transmission transformation, including the following steps: performing vanishing point detection on an image to be encoded; forming a normal vector of a plane according to parallel lines corresponding to vanishing points, and calculating a perspective transformation matrix Hm of the plane; at an encoding end, searching for an optimal matching block in a reconstructed image region, setting a motion vector that identifies a candidate position, and performing surface transmission transformation; obtaining coordinates ofpredicted pixels; at a decoding end, inputting a code stream to be decoded, and parsing the perspective transformation matrix; parsing the motion vector from the code stream, and performing surface transmission transformation; and obtaining the coordinates of the predicted pixels. According to the video encoding / decoding method based on surface transmission transformation disclosed by the invention, by performing surface transmission transformation on the motion vector, the predicted pixel coordinates can be obtained, the correlation between similar image contents represented as the deformation can be eliminated, the encoding / decoding efficiency can be greatly improved, and the scheme of the invention can be applied to H.264 / H.265 / H.266 and other encoding methods.

A method for decoding a video according to the present invention may comprise: determining whether to divide a current block with quad tree partitioning, determining whether to divide the current block with binary tree partitioning when the current block is not divided with the quad tree partitioning, determining a binary tree partition type for the current block when it is determined to divide the current block with the binary tree partitioning, and dividing the current block into two partitions according to the determined binary tree partition type.

An encoding / decoding device according to the present invention derives the residual coefficient of a residual block, calculates a quantization parameter with respect to the residual block, performs inverse quantization for the residual coefficient by means of the quantization parameter, and can restore a residual sample of the residual block by performing inverse transformation for the inverse quantized residual coefficient.

The present invention discloses an image encoding / decoding method and a device therefor. Specifically, an image encoding method may comprise the steps of: generating a quantized transform block by performing transform and quantization on a residual signal of a current block; splitting the quantized transform block into a plurality of coefficient groups; determining a first scan order representingthe scan order among the coefficients of the coefficient groups; and entropy encoding the coefficients of the quantized transform block according to the first scan order, and a second scan order representing the scan order among the plurality of coefficient groups.

In a video signal processing method and device according to the present invention, a first prediction value of a chrominance block is derived by means of a sample of a luminance block, a compensationparameter is calculated on the basis of a predetermined reference region, a second prediction value of the chrominance block is derived by applying the compensation parameter to the first prediction value, and the chrominance block can be restored on the basis of the second prediction value of the chrominance block.