Method and apparatus for video encoding and decoding using pattern-based block filtering

Patent metadata

Field	Value
Publication number	US-12483697-B2
Application number	US-202318206941-A
Country	US
Kind code	B2
Filing date	Jun 7, 2023
Priority date	Sep 8, 2017
Publication date	Nov 25, 2025
Grant date	Nov 25, 2025

Abstract

Methods and apparatuses for video coding and decoding are provided. The method of video encoding includes accessing a reconstructed block corresponding to a block in a picture of a video, determining at least one filter pattern based on a property of the block and filtering the reconstructed block according to the at least one filter pattern. The method of video decoding includes accessing a reconstructed block corresponding to a block in a picture of an encoded video, determining at least one filter pattern based on a property of the block and filtering the reconstructed block according to the at least one filter pattern. A bitstream formatted to include encoded data, a computer-readable storage medium and a computer program product are also described.

First claim

The invention claimed is:

1 . A method of video encoding comprising:
accessing a reconstructed block corresponding to a block in a picture of a video; determining at least one characteristic of a bilateral filter based on a shape of the block; and filtering samples of the reconstructed block using the determined bilateral filter, wherein the at least one characteristic of the bilateral filter comprises a filter pattern or a partial filter pattern, determined from at least two filter patterns and at least one partial pattern, wherein a partial pattern is used in perimeter samples of the reconstructed block, a partial pattern being a filter pattern with filter coefficients corresponding to samples outside of the reconstructed block that remain unprocessed.

2 . The method of claim 1 , wherein at least one other characteristic of the bilateral filter is a value of at least one coefficient of the bilateral filter.

3 . The method of claim 1 , wherein the at least one characteristic of the bilateral filter is signaled in video data representative of the video by a syntax element.

4 . A non-transitory information storage medium storing program code instructions for implementing the method according to claim 1 .

5 . A method of video decoding comprising:
obtaining a reconstructed block corresponding to a block in a picture of a video; determining at least one characteristic of a bilateral filter based on a shape of the block; and, filtering samples of the reconstructed block using the determined bilateral filter, wherein the at least one characteristic of the bilateral filter comprises a filter pattern or a partial filter pattern, determined from at least two filter patterns and at least one partial pattern, wherein a partial pattern is used in perimeter samples of the reconstructed block, a partial pattern being a filter pattern with filter coefficients corresponding to samples outside of the reconstructed block that remain unprocessed.

6 . The method of claim 5 , wherein at least one other characteristic of the bilateral filter is a value of at least one coefficient of the bilateral filter.

7 . A non-transitory information storage medium storing program code instructions for implementing the method according to claim 5 .

8 . A device for video encoding comprising electronic circuitry configured to:
access a reconstructed block corresponding to a block in a picture of a video; determine at least one characteristic of a bilateral filter based on a shape of the block; and, filter samples of the reconstructed block using the determined bilateral filter, wherein the at least one characteristic of the bilateral filter comprises a filter pattern or a partial filter pattern, determined—from at least two filter patterns and at least one partial pattern, wherein a partial pattern is used in perimeter samples of the reconstructed block, a partial pattern being a filter pattern with filter coefficients corresponding to samples outside of the reconstructed block that remain unprocessed.

9 . The device of claim 8 , wherein at least one other characteristic of the bilateral filter is a value of at least one coefficient of the bilateral filter.

10 . The device of claim 8 , wherein the at least one characteristic of the bilateral filter is signaled in video data representative of the video by a syntax element.

11 . A device for video decoding comprising electronic circuitry configured to:
obtain a reconstructed block corresponding to a block in a picture of a video; determine at least one characteristic of a bilateral filter based on a shape of the block; and, filter samples of the reconstructed block using the determined bilateral filter, wherein the at least one characteristic of the bilateral filter comprises a filter pattern or a partial filter pattern, determined—from at least two filter patterns and at least one partial pattern, wherein a partial pattern is used in perimeter samples of the reconstructed block, a partial pattern being a filter pattern with filter coefficients corresponding to samples outside of the reconstructed block that remain unprocessed.

12 . The device of claim 11 , wherein at least one other characteristic of the bilateral filter is a value of at least one coefficient of the bilateral filter.

13 . The method of claim 3 , wherein the syntax element is shared among one of:
a plurality of pixels in the block; a plurality of blocks in the picture; a plurality of slices in the picture; or a plurality of pictures in the video.

14 . The method of claim 5 , wherein the at least one characteristic of the bilateral filter is signaled in video data representative of the video by a syntax element.

15 . The method of claim 14 , wherein the syntax element is shared among one of:
a plurality of pixels in the block; a plurality of blocks in the picture; a plurality of slices in the picture; or a plurality of pictures in the video.

16 . The device of claim 10 , wherein the syntax element is shared among one of:
a plurality of pixels in the block; a plurality of blocks in the picture; a plurality of slices in the picture; or a plurality of pictures in the video.

17 . The device of claim 11 , wherein the at least one characteristic of the bilateral filter is signaled in video data representative of the video by a syntax element.

18 . The device of claim 17 , wherein the syntax element is shared among one of:
a plurality of pixels in the block; a plurality of blocks in the picture; a plurality of slices in the picture; or a plurality of pictures in the video.

19 . The method of claim 1 , wherein the at least two filter patterns comprises at least two of: a cross pattern, a diagonal pattern, a square pattern, a horizontal-cross pattern, a vertical-cross pattern, a diagonal-left pattern, or a diagonal-right pattern, and wherein the at least one partial pattern comprises at least one of: a partial cross pattern, a partial diagonal pattern, a partial square pattern, a partial horizontal-cross pattern, a partial vertical-cross pattern, a partial diagonal-left pattern, or a partial diagonal-right pattern.

20 . The method of claim 5 , wherein the at least two filter patterns comprises at least two of: a cross pattern, a diagonal pattern, a square pattern, a horizontal-cross pattern, a vertical-cross pattern, a diagonal-left pattern, or a diagonal-right pattern, and wherein the at least one partial pattern comprises at least one of: a partial cross pattern, a partial diagonal pattern, a partial square pattern, a partial horizontal-cross pattern, a partial vertical-cross pattern, a partial diagonal-left pattern, or a partial diagonal-right pattern.

Assignees

• Interdigital Vc Holdings Inc

Inventors

• Bordes Philippe
• De Lagrange Philippe
• Francois Edouard

Classifications

• H04N19/174

  the region being a slice, e.g. a line of blocks or a group of blocks · CPC title

• H04N19/80

  Details of filtering operations specially adapted for video compression, e.g. for pixel interpolation (H04N19/635, H04N19/86 take precedence) · CPC title

• H04N19/70

  characterised by syntax aspects related to video coding, e.g. related to compression standards · CPC title

• H04N19/176 Primary

  the region being a block, e.g. a macroblock · CPC title

• H04N19/157

  Assigned coding mode, i.e. the coding mode being predefined or preselected to be further used for selection of another element or parameter · CPC title