26 results about "Boundary strength" patented technology

Methods for video decoding and encoding, apparatuses and non-transitory computer-readable storage media thereof are provided. In one method for video decoding, a decoder may obtain a first and a second block, where the first block is coded with an Intra Block Copy (IBC) mode or an intra Template Matching Prediction (TMP) mode, and the second block is coded with the intra TMP mode or the IBC mode. Additionally, the decoder may obtain a boundary strength for a deblocking filter by applying a predefined criterion in one of an intra mode or an inter mode. Further, the decoder may apply, and based on the boundary strength, the deblocking filter on the first block and the second block.

The present application provides a decoding method, wherein the decoding comprises decoding or encoding, and the method comprises: determining whether to use combined inter-intra prediction (CIIP) to predict a current coding unit; and setting a boundary strength of a boundary of the current coding unit to a first value after determining to use CIIP to predict the current coding unit.

Different implementations are described, particularly implementations for video encoding and decoding are presented including a method for deblocking an image. According to an implementation, in a method for deblocking an image, at least one boundary is determined between a first block of samples and a second block of samples; a boundary strength is determined according to at least one of a prediction mode of the first block and a prediction mode of the second block; and samples of the first and second blocks neighboring the at least one boundary are filtered according to the boundary strength. Advantageously, in case the prediction mode of the first block is a weighted prediction mode, the boundary strength further depends on the relative weight of samples used in predicting the first block of samples according to the weighted prediction mode of the first block and reciprocally for the second block.

Provided is an image encoding method using adaptive neural network-based filtering. The method comprises the steps of: deriving a boundary strength (BS) for at least one block boundary within a reconstructed image region; determining whether to perform neural network-based filtering using the BS; and performing neural network-based filtering on the image region on the basis of the determination.

In an exemplary aspect, a method for visual media processing includes determining whether a pair of adjacent blocks of visual media data are both intra block copy (IBC) coded; and selectively applying, based on the determination, a deblocking filter (DB) process by identifying a boundary at a vertical edge and / or a horizontal edge of the pair of adjacent blocks, calculating a boundary strength of a filter, deciding whether to turn on or off the filter, and selecting a strength of the filter in case the filter is turned on, wherein the boundary strength of the filter is dependent on a motion vector difference between motion vectors associated with the pair of adjacent blocks.

An image encoding / decoding method and apparatus are provided. An image decoding method according to the present disclosure may comprise obtaining a reconstructed picture, determining a target boundary of deblocking filtering in the reconstructed picture, determining a boundary strength for the target boundary, and applying deblocking filtering to the target boundary based on the boundary strength. Based on the target boundary being a transform block boundary and a color component of the reconstructed picture being a chroma component, the boundary strength may be determined based on whether joint CbCr residual coding is performed on at least one of two blocks adjacent to the target boundary, and the joint CbCr residual coding may correspond to encoding residual samples for a chroma Cb component and a chroma Cr component as a single transform block.

The encoding device (100) has a circuit and a memory connected to the circuit, and the circuit performs, in operation, a process of deciding a boundary strength (S311) for controlling whether or not to perform deblocking filter processing for a block boundary of a generated reconstructed image. The decided process includes a process of setting the boundary strength to a second value in a case where encoding modes of one of a current block and a neighboring block of the current block and an encoding mode of the other are different from each other, the encoding modes of the one and the other being one of an intra block copy mode, a palette mode, and an inter mode, the setting process being performed in a case where the current block is a luma block, and not being performed in a case where the current block is a chroma block.

A method and apparatus for sample-based prediction offset are disclosed. According to the method, input data associated with one or more blocks in a current picture is received, wherein the input data corresponds to residual data, prediction data, reconstructed data, or filtered-reconstructed data for said one or more blocks. Neural Network Loop Filter (NNLF) is applied to the input data to generate a filtered signal, wherein the NNLF uses NN input signal comprising side information including a transformed value of boundary strength (BS) value derived through a transform equation, and wherein the BS value is determined from said one or more blocks. The filtered signal is provided for further encoding or decoding process.

Systems, methods, and instrumentalities described herein may be associated with coordinating an intra block copy variant tool on a deblocking filter. A device (e.g., a video encoder and / or decoder) may determine that coding modes of neighboring blocks of a boundary are associated with intra block copies (IBCs). The apparatus may determine a boundary strength for deblocking filtering based on determining a coding mode of a neighboring block is associated with an IBC. The device may perform deblocking filtering based on the determined boundary strength.

A video decoding / encoding method and apparatus according to the present disclosure may determine a filter length of a deblocking filter to be applied to a block boundary between a first block and a second block in a current picture, determine a boundary strength of the deblocking filter, determine a deblocking filter having a predetermined type and strength based on the filter length and the boundary strength, and apply the deblocking filter to the block boundary between the first block and the second block. Here, the filter length of the deblocking filter may be determined based on whether multiple reference prediction is applied to at least one of the first block or the second block.

This disclosure relates to an encoding method, a decoding method, and a method for generating a bitstream. The encoding method includes: when the first block is a luma block, performing a decision process to determine the boundary strength of the boundary between the first block and the second block, the decision process including determining whether a first condition is met, the first condition being: (i) a first encoding mode of the first block is different from a second encoding mode of the second block and (ii) the first encoding mode and the second encoding mode are one of an intra-block copy mode, a palette mode, and an inter-frame mode; if the first condition is met, the boundary strength is determined to be a first value indicating that deblocking filtering should be performed; if the first condition is not met, the boundary strength is determined to be a second value indicating that deblocking filtering should not be performed; and when the first block is a chroma block, the determination of whether the first condition is met is not performed.

A deepfake detection method and device are provided. The deepfake detection method may comprise the steps of: receiving a bitstream of an image; obtaining syntax information from the bitstream; calculating a unreliability measurement value on the basis of the syntax information; and determining whether the image is a deepfake on the basis of the unreliability measurement value, wherein the syntax information may be at least one of a quantization parameter, a transform coefficient, a bit rate, a motion vector, a reference picture index, or a boundary strength of a deblocking filter.

Apparatuses and methods for encoding and decoding a video are provided. The method includes determining whether at least one of two blocks of an image in a video is predicted with a combined inter-intra prediction (CIIP), where the two blocks include a first block (block Q) and a second block (block P). There is a boundary between the two blocks. The method further includes setting a boundary strength (Bs) for the boundary to a first value when at least one of the two blocks is predicted with the CHIP, and performing deblocking filter based on the Bs.

A mechanism for processing video data is disclosed. The mechanism includes determining to employ a boundary strength of a deblocking filter (DBF-BS) as side information input into an adaptive loop filter (ALF) or a cross component ALF (CC-ALF). A conversion can then be performed between a visual media data and a bitstream based on the ALF or CC-ALF.

A method and apparatus for encoding / decoding images are provided. The method for decoding an image according to this disclosure may include the following steps: obtaining a reconstructed image; determining a target boundary for deblocking filtering in the reconstructed image; determining the boundary strength of the target boundary; and applying deblocking filtering to the target boundary based on the boundary strength, wherein, when the target boundary is a transform block boundary and the color components of the reconstructed image are chrominance components, the boundary strength may be determined based on whether joint CbCr residual coding is performed on at least one of two blocks adjacent to the target boundary, and the joint CbCr residual coding may correspond to encoding residual samples of the chrominance Cb components and chrominance Cr components into a single transform block.

A method and apparatus for encoding / decoding an image are provided. A method for decoding an image according to the present disclosure can include the steps of obtaining a reconstructed image, determining a target boundary of deblocking filtering in the reconstructed image, determining a boundary strength of the target boundary, and applying deblocking filtering to the target boundary based on the boundary strength, wherein when the target boundary is a transform block boundary and a color component of the reconstructed image is a chroma component, the boundary strength can be determined based on whether joint CbCr residual coding is performed on at least one of two blocks adjacent to the target boundary, and the joint CbCr residual coding can correspond to encoding residual samples of a chroma Cb component and a chroma Cr component as a single transform block.

An image encoding / decoding method and apparatus are provided. An image decoding method according to the present disclosure may comprise obtaining a reconstructed picture, determining a target boundary of deblocking filtering in the reconstructed picture, determining a boundary strength for the target boundary, and applying deblocking filtering to the target boundary based on the boundary strength. Based on the target boundary being a transform block boundary and a color component of the reconstructed picture being a chroma component, the boundary strength may be determined based on whether joint CbCr residual coding is performed on at least one of two blocks adjacent to the target boundary, and the joint CbCr residual coding may correspond to encoding residual samples for a chroma Cb component and a chroma Cr component as a single transform block.

A method for processing image data can include determining a boundary strength per each 4-sample edge which is a boundary of a transform unit or a prediction unit and lies on an 8×8 sample grid, determining whether to apply a deblocking filtering on the 4-sample edge when the boundary strength of the 4-sample edge is not zero, selecting a deblocking filter to be applied on the 4-sample edge when it is determined to apply a deblocking filtering on the 4-sample edge, filtering the 4-sample edge by using the selected deblocking filter, and applying an edge offset when a sample adaptive offset (SAO) type indicates the edge offset.

An image encoding / decoding method and apparatus are provided. An image decoding method according to the present disclosure may comprise obtaining a reconstructed picture, determining a target boundary of deblocking filtering in the reconstructed picture, determining a boundary strength for the target boundary, and applying deblocking filtering to the target boundary based on the boundary strength. Based on the target boundary being a transform block boundary and a color component of the reconstructed picture being a chroma component, the boundary strength may be determined based on whether joint CbCr residual coding is performed on at least one of two blocks adjacent to the target boundary, and the joint CbCr residual coding may correspond to encoding residual samples for a chroma Cb component and a chroma Cr component as a single transform block.

A method by which a decoding device decodes an image, according to the present document, comprises the steps of: generating a restoration picture on the basis of prediction samples of a coding block; deriving a boundary strength (BS) for a boundary of the coding block in the restoration picture; performing deblocking filtering on the boundary of the coding block on the basis of the boundary strength; and deriving a modified restoration picture for the restoration picture on the basis of the deblocking filtering, wherein the boundary strength is derived on the basis of a prediction mode of a first block and a second block that are adjacent to the boundary of the coding block, and the prediction mode of the first block or the second block is derived on the basis of whether the prediction mode of the first block or the second block is a current picture referencing (CPR) mode to be coded in reference to a current picture.

The present disclosure provides a coding method, wherein the coding includes decoding or encoding, and the method comprises determining whether a current coding unit is predicted by application of combined inter-intra prediction (CIIP); and in response to determining that the current coding unit is predicted by application of CIIP, setting a boundary strength of a boundary of the current coding unit to a first value.

An image decoding method may include determining a target boundary for a filtering by dividing a reconstructed picture; deriving a boundary strength for the target boundary based on whether at least one block among blocks adjacent to the target boundary was coded by a partition combined prediction, where the partition combined prediction represents a mode in which a prediction is performed by combining a first prediction block of a first partition and a second prediction block of a second partition based on a block being geometrically partitioned into the first partition and the second partition; and performing a filtering for the target boundary based on the boundary strength, where the first prediction block and the second prediction block are prediction blocks in which different predictions were performed.

An image encoding / decoding method and apparatus are provided. An image decoding method according to the present disclosure may comprise obtaining a reconstructed picture, determining a target boundary of deblocking filtering in the reconstructed picture, determining a boundary strength for the target boundary, and applying deblocking filtering to the target boundary based on the boundary strength. Based on the target boundary being a transform block boundary and a color component of the reconstructed picture being a chroma component, the boundary strength may be determined based on whether joint CbCr residual coding is performed on at least one of two blocks adjacent to the target boundary, and the joint CbCr residual coding may correspond to encoding residual samples for a chroma Cb component and a chroma Cr component as a single transform block. 20 25 20 19 38 18 M ar 2 02 5 M a r 2 0 2 5 A B S T R A C T 2 0 2 5 2 0 1 9 3 8 1 8

A deblocking method, for deblocking a transform block boundary within a coding block in an image encoding and / or an image decoding is provided, where the coding block comprising transform blocks is coded in inter prediction mode and the transform blocks comprises a first transform block and a second transform block. The method comprises: determining, when the boundary between the first transform block and the second transform block is a transform block boundary and at least one of the first transform block and the second transform block has one or more non-zero transform coefficients, a value of a BS parameter for the boundary between the first transform block and the second transform block to be a first value; and performing de-blocking filtering process to the boundary between the first transform block and the second transform block at least based on the value of the boundary strength parameter.

A deblocking filtering method, a boundary strength (bS) deriving method, and encoding / decoding method and apparatus using the methods are provided. The bS deriving method includes the steps of: deriving a boundary of a deblocking filtering unit block which is a unit block on which deblocking filtering is performed; and setting a bS for each bS setting unit block in the deblocking filtering unit block. Here, the step of setting the bS includes setting a bS value of a target boundary corresponding to the boundary of the deblocking filtering unit block as the bS setting unit block.

A method and apparatus for encoding / decoding an image are provided. A method for decoding an image according to the present disclosure can include the steps of obtaining a reconstructed image, determining a target boundary of deblocking filtering in the reconstructed image, determining a boundary strength of the target boundary, and applying deblocking filtering to the target boundary based on the boundary strength, wherein when the target boundary is a transform block boundary and a color component of the reconstructed image is a chroma component, the boundary strength can be determined based on whether joint CbCr residual coding is performed on at least one of two blocks adjacent to the target boundary, and the joint CbCr residual coding can correspond to encoding residual samples of a chroma Cb component and a chroma Cr component as a single transform block.