Granted Patent B2

US 12,739,362 · App. 18/942,242 · Granted Sep 15, 2026

Inventor: Ki Baek Kim (Seo-gu, KR)

Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.

H04N19/105H04N19/119H04N19/132H04N19/159H04N19/176

Abstract

Claims (69)

1 . A method for video signal processing, performed by a decoder, comprising:

determining an intra prediction mode of a current block;

determining a reference sample used for an intra prediction of the current block;

determining a predetermined matrix based on the intra prediction mode; and

predicting the current block based on the reference sample and the matrix, comprising:

generating a prediction block by applying the matrix to the reference sample, wherein the prediction block is generated at predetermined positions in the current block;

performing interpolation on the current block based on at least one of the following: the prediction block or reconstructed samples adjacent to the current block; and

performing re-arrangement on all or part of prediction samples of the generated prediction block.

2 . The method according to claim 1 , wherein determining the reference sample comprises:

determining a neighboring region of the current block; and

performing down-sampling on the determined neighboring region, wherein the neighboring region is divided into a plurality of sample groups, the sample group comprises one or more samples, a representative value of the sample group is determined as the reference sample, and the representative value is one of the following: an average, a minimum, a maximum, a mode value and an intermediate value.

3 . The method according to claim 1 , wherein the predetermined positions in the current block are determined based on a ratio of the size of the current block to a size of a sampling block.

4 . The method according to claim 1 , wherein the matrix is determined from a plurality of matrix groups by further consideration of a size and shape of the current block.

5 . A method for video signal processing, performed by an encoder, comprising:

determining an intra prediction mode of a current block;

determining a reference sample used for an intra prediction of the current block;

determining a predetermined matrix based on the intra prediction mode; and

predicting the current block based on the reference sample and the matrix, comprising:

generating a prediction block by applying the matrix to the reference sample, wherein the prediction block is generated at predetermined positions in the current block;

performing interpolation on the current block based on at least one of the following: the prediction block or reconstructed samples adjacent to the current block; and

performing re-arrangement on all or part of prediction samples of the generated prediction block.

6 . The method according to claim 5 , wherein determining the reference sample comprises:

determining a neighboring region of the current block; and

performing down-sampling on the determined neighboring region, wherein the neighboring region is divided into a plurality of sample groups, the sample group comprises one or more samples, a representative value of the sample group is determined as the reference sample, and the representative value is one of the following: an average, a minimum, a maximum, a mode value and an intermediate value.

7 . The method according to claim 5 , wherein the predetermined positions in the current block are determined based on a ratio of the size of the current block to a size of a sampling block.

8 . The method according to claim 5 , wherein the matrix is determined from a plurality of matrix groups by further consideration of a size and shape of the current block.

9 . A decoder, comprising:

a processor; and

a memory, wherein the memory is configured to store computer programs capable of running in the processor, and when the computer programs are run by the processor, the processor is configured to:

determine an intra prediction mode of a current block;

determine a reference sample used for an intra prediction of the current block;

determine a predetermined matrix based on the intra prediction mode; and

generate a prediction block by applying the matrix to the reference sample, wherein the prediction block is generated at predetermined positions in the current block;

wherein the processor is further configured to:

perform interpolation on the current block based on at least one of the following: the prediction block or reconstructed samples adjacent to the current block; and

perform re-arrangement on all or part of prediction samples of the generated prediction block.

10 . The decoder according to claim 9 , wherein the processor is further configured to:

determine a neighboring region of the current block; and

perform down-sampling on the determined neighboring region, wherein the neighboring region is divided into a plurality of sample groups, the sample group comprises one or more samples, a representative value of the sample group is determined as the reference sample, and the representative value is one of the following: an average, a minimum, a maximum, a mode value and an intermediate value.

11 . The decoder according to claim 9 , wherein the predetermined positions in the current block are determined based on a ratio of the size of the current block to a size of a sampling block.

12 . The decoder according to claim 9 , wherein the matrix is determined from a plurality of matrix groups by further consideration of a size and shape of the current block.

13 . An encoder, comprising:

a processor; and

a memory, wherein the memory is configured to store computer programs capable of running in the processor, and when the computer programs are run by the processor, the processor is configured to:

determine an intra prediction mode of a current block;

determine a reference sample used for an intra prediction of the current block;

determine a predetermined matrix based on the intra prediction mode; and

generate a prediction block by applying the matrix to the reference sample, wherein the prediction block is generated at predetermined positions in the current block;

wherein the processor is further configured to:

perform interpolation on the current block based on at least one of the following: the prediction block or reconstructed samples adjacent to the current block; and

perform re-arrangement on all or part of prediction samples of the generated prediction block.

14 . The encoder according to claim 13 , wherein the processor is configured to:

determine a neighboring region of the current block; and

perform down-sampling on the determined neighboring region, wherein the neighboring region is divided into a plurality of sample groups, the sample group comprises one or more samples, a representative value of the sample group is determined as the reference sample, and the representative value is one of the following: an average, a minimum, a maximum, a mode value and an intermediate value.

15 . The encoder according to claim 13 , wherein the predetermined positions in the current block are determined based on a ratio of the size of the current block to a size of a sampling block.

16 . The encoder according to claim 13 , wherein the matrix is determined from a plurality of matrix groups by further consideration of a size and shape of the current block.

17 . A non-transitory computer-readable storage medium, having a computer program and a bitstream stored thereon, wherein the computer program, when executed by a processor, enables the processor to perform steps of a method for video signal processing to generate the bitstream, wherein the method for video signal processing comprises:

determining an intra prediction mode of a current block;

determining a reference sample used for an intra prediction of the current block;

determining a predetermined matrix based on the intra prediction mode; and

predicting the current block based on the reference sample and the matrix, comprising:

generating a prediction block by applying the matrix to the reference sample, wherein the prediction block is generated at predetermined positions in the current block;

performing interpolation on the current block based on at least one of the following: the prediction block or reconstructed samples adjacent to the current block; and

performing re-arrangement on all or part of prediction samples of the generated prediction block.

18 . The non-transitory computer-readable storage medium according to claim 17 , wherein determining the reference sample comprises:

determining a neighboring region of the current block; and

performing down-sampling on the determined neighboring region, wherein the neighboring region is divided into a plurality of sample groups, the sample group comprises one or more samples, a representative value of the sample group is determined as the reference sample, and the representative value is one of the following: an average, a minimum, a maximum, a mode value and an intermediate value.

19 . The non-transitory computer-readable storage medium according to claim 17 , wherein the predetermined positions in the current block are determined based on a ratio of the size of the current block to a size of a sampling block.

20 . The non-transitory computer-readable storage medium according to claim 17 , wherein the matrix is determined from a plurality of matrix groups by further consideration of a size and shape of the current block.

Assignments (1)

Priority Claims (1)

Continuity (4)

References Cited (151)