IP Library › Granted Patent US 11,647,183
Granted Patent B2
US 11,647,183 · App. 17/533,297 · Granted May 9, 2023

Method and apparatus for processing intra-prediction-based video signal

Inventors: Yung Lyul Lee (Seoul, KR); Nam Uk Kim (Seoul, KR)
Assignee: Industry Academy Cooperation Foundation of Sejong University
H04N19/11H04N19/105H04N19/117H04N19/159H04N19/167H04N19/176H04N19/182H04N19/593H04N19/82
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Quick Facts
Patent No.
US 11,647,183
App. No.
17/533,297
Granted
May 9, 2023
Kind
B2
Abstract

According to the present invention, provided is a method of processing a video signal, the method including: obtaining a transform coefficient of a current block from a bitstream according to a predetermined scanning order; determining an intra prediction mode of the current block on the basis of the transform coefficient; and performing intra prediction on the current block using the intra prediction mode and a neighboring sample adjacent to the current block.

Claims (42)

1. A video decoding method, comprising:

determining MPM list of a current block based a neighboring block of the current block:

determining an intra prediction mode of the current block based on the MPM list;

generating prediction pixels in the current block by performing a DC intra prediction on the current block based on at least one of neighboring pixels of the current block in response to the intra prediction mode of the current block being a DC mode; and

filtering a prediction pixel in the current block by a weighting filter, and

wherein, the filtered prediction pixel by the weighting filter is determined based on a weighted sum of the top reference pixel, the left reference pixel and the prediction pixel,

the left reference pixel of the prediction pixel is included in a same row as the prediction pixel and the top reference pixel of the prediction pixel is included in a same column as the prediction pixel,

the prediction pixel is filtered by the weighting filter in response to at least one of a first weight for the top reference pixel and a second weight for the lett reference pixel greater than zero,

the first weight is determined to be zero in response to a distance from the top reference pixel greater than a predetermined value and the second weight is determined to be zero in response to a distance from the left reference pixel greater than the predetermined value, and

the predetermined value is determined based on a size of the current block.

2. The method of claim 1 , wherein whether to apply the weighting filter is determined based on at least one of the intra prediction mode of the current block and a partition type of the current block.

3. The method of claim 1 , wherein the weighting filter is applied based on weights of the weighting filter,

wherein the second weight for the left reference pixel is derived based on a distance between the prediction pixel and the left reference pixel, and the first weight for the top reference pixel is derived based on a distance between the prediction pixel and the top reference pixel.

4. The method of claim 1 , wherein the left reference pixel and the top reference pixel are included in the neighboring pixels.

5. The method of claim 1 , wherein a range of the reference pixel is determined based on at least one of the intra prediction mode of the current block, a size of the current block, and a shape of the current block.

6. A video encoding method, comprising:

determining an intra prediction mode of a current block;

determining an MPM list of the current block based a neighboring block of the current block and encoding the intra prediction mode of the current block based on the MPM list of the current block;

generating prediction pixels in the current block by performing a DC intra prediction on the current block based on at least one of neighboring pixel of the current block in response to the intra prediction mode of the current block being a DC mode; and

filtering a prediction pixel in the current block by a weighting filter, and

wherein, the filtered prediction pixel by the weighting filter is determined based on a weighted sum of the top reference pixel, the left reference pixel and the prediction pixel,

the left reference pixel of the prediction pixel is included in a same row as the prediction pixel and the top reference pixel of the prediction pixel is included in a same column as the prediction pixel,

the prediction pixel is filtered by the weighting filter in response to at least one of a first weight for the top reference pixel and a second weight for the left reference pixel greater than zero,

the first weight is determined to be zero in responce to a distance from the reference pixel greater than a predetermined value and the second weight determined to be zero in response to a distance from the left reference pixel greater than the predetermined value, and

the predetermined value is determined base on a size of the current block.

7. The method of claim 6 , wherein whether to apply the weighting filter is determined based on at least one of the intra prediction mode of the current block and a partition type of the current block.

8. The method of claim 6 ,

wherein the second weight for the left reference pixel is derived based on a distance between the prediction pixel and the left reference pixel, and the first weight for the top reference pixel is derived based on a distance between the prediction pixel and the top reference pixel.

9. The method of claim 6 , wherein the left reference pixel and the top reference pixel are included in the neighboring pixels.

10. The method of claim 6 , wherein a range of the reference pixel is determined based on at least one of the intra prediction mode of the current block, a size of the current block, and a shape of the current block.

11. A computer-readable recording medium storing a bitstream which is received and decoded by a video decoding method to reconstruct an image,

wherein the bitstream comprises information indicating an intra prediction mode of a current block, and

the video decoding method configured to:

determine an MPM list of the current block based a neighboring block of the current block;

determine an intra prediction mode of the current block based on the MPM list of the current block and the information indicating the intra prediction mode of the current block;

generate prediction pixels in the current block by performing a DC intra prediction on the current block based on at least one of neighboring pixels of the current block in response to the intra prediction mode of the current block being a DC mode; and

filter a prediction pixel in the current block by a weighting filter, and

wherein, the filtered prediction pixel by the weighting filter is determined based on a weighted sum of the top reference pixel, the left reference pixel and the prediction pixel,

the left reference pixel of the prediction pixel is included in a same row as the prediction pixel and the top reference pixel of the prediction pixel is included in a same column as the prediction pixel,

the prediction pixel is filtered by the weighting filter in response to at least one of first weight for the top reference pixel and a second weight for the left reference pixel greater than zero,

the first weight is determined to be zero in response to a distance from the top reference pixel greater than a predetermined value and the second weight is determined to be zero in response to a distance from the left reference pixel greater than the predetermined value, and

the predetermined value is determined based on a size of the current block.

Priority Claims (1)
KR 10-2016-0032142 · Mar 17, 2016 · national
Continuity (2)
Continuation 16085724
Related Publication 20220086436A1 · Mar 17, 2022