IP Library › Granted Patent US 12,501,081
Granted Patent B2
US 12,501,081 · App. 17/876,708 · Granted Dec 16, 2025

Handling face discontinuities in 360-degree video coding

Inventors: Philippe Hanhart (La Conversion, CH); Yuwen He (San Diego, CA); Yan Ye (San Diego, CA)
Assignee: InterDigital VC Holdings, Inc.
H04N19/82H04N19/176H04N19/184H04N19/597G06T3/047G06T3/067H04N19/117H04N19/70
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Quick Facts
Patent No.
US 12,501,081
App. No.
17/876,708
Granted
Dec 16, 2025
Kind
B2
Abstract

Systems, methods, and instrumentalities may be provided for discounting reconstructed samples and/or coding information from spatial neighbors across face discontinuities. Whether a current block is located at a face discontinuity may be determined. The face discontinuity may be a face boundary between two or more adjoining blocks that are not spherical neighbors. The coding availability of a neighboring block of the current block may be determined, e.g., based on whether the neighboring block is on the same side of the face discontinuity as the current block. For example, the neighboring block may be determined to be available for decoding the current block if it is on the same side of the face discontinuity as the current block, and unavailable if it is not on the same side of the face discontinuity. The neighboring block may be a spatial neighboring block or a temporal neighboring block.

Claims (23)

1 . A method comprising:

obtaining at least a syntax element configured to indicate a number of discontinuous face boundaries in a picture; and

for each discontinuous face boundary in the picture:

obtaining a discontinuous face boundary position indicator configured to indicate a position along an axis that is associated with the discontinuous face boundary between two discontinuous faces in the picture, wherein the picture represents a 360 degree picture and comprises a frame-packed picture having a plurality of faces,

based on the obtained discontinuous face boundary position indicator, determining the position of the discontinuous face boundary between the two discontinuous faces in the picture, and

disabling loop filtering across the determined position of the discontinuous face boundary between the two discontinuous faces in the picture.

2 . The method of claim 1 , wherein the discontinuous face boundary position indicator is configured to indicate a start position and an end position of at least one discontinuous face boundary.

3 . The method of claim 1 , wherein the discontinuous face boundary position indicator comprises at least one of a vertical discontinuous face boundary position indicator or a horizontal discontinuous face boundary position indicator, wherein the vertical discontinuous face boundary position indicator is configured to indicate a position along a horizontal axis that is associated with a vertical discontinuous face boundary in the picture, and wherein the horizontal discontinuous face boundary position indicator is configured to indicate a position along a vertical axis that is associated with a horizontal discontinuous face boundary in the picture.

4 . The method of claim 1 , wherein a face boundary between two faces in the picture is discontinuous if the two faces do not share a same edge in a 3D geometry.

5 . The method of claim 1 , wherein the discontinuous face boundary indicator is obtained at a sequence parameter set (SPS) level.

6 . The method of claim 1 , wherein the loop filtering comprises at least one of adaptive loop filter (ALF), deblocking filter, or sample adaptive offset (SAO) filter.

7 . An apparatus comprising:

a processor configured to:

obtain at least a syntax element configured to indicate a number of discontinuous face boundaries in a picture; and

for each discontinuous face boundary in the picture:

obtain a discontinuous face boundary position indicator configured to indicate a position along an axis that is associated with the discontinuous face boundary between two discontinuous faces in the picture, wherein the picture represents a 360 degree picture and comprises a frame-packed picture having a plurality of faces,

based on the obtained discontinuous face boundary position indicator, determine the position of the discontinuous face boundary between the two discontinuous faces in the picture, and

disable loop filtering across the determined position of the discontinuous face boundary between the two discontinuous faces in the picture.

8 . The apparatus of claim 7 , wherein the discontinuous face boundary position indicator is configured to indicate a start position and an end position of at least one discontinuous face boundary.

9 . The apparatus of claim 7 , wherein the discontinuous face boundary position indicator comprises at least one of a vertical discontinuous face boundary position indicator or a horizontal discontinuous face boundary position indicator, wherein the vertical discontinuous face boundary position indicator is configured to indicate a position along a horizontal axis that is associated with a vertical discontinuous face boundary in the picture, and wherein the horizontal discontinuous face boundary position indicator is configured to indicate a position along a vertical axis that is associated with a horizontal discontinuous face boundary in the picture.

10 . The apparatus of claim 7 , wherein a face boundary between two faces in the picture is discontinuous if the two faces do not share a same edge in a 3D geometry.

11 . The apparatus of claim 7 , wherein the discontinuous face boundary indicator is obtained at a sequence parameter set (SPS) level.

12 . The apparatus of claim 7 , wherein the loop filtering comprises at least one of adaptive loop filter (ALF), deblocking filter, or sample adaptive offset (SAO) filter.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 12, 2024
From: HANHART, PHILIPPE; HE, YUWEN; YE, YAN
To: VID SCALE, INC.
Reel/Frame 068571/0590 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 11, 2024
From: VID SCALE, INC.
To: INTERDIGITAL VC HOLDINGS, INC.
Reel/Frame 068284/0031 →
Continuity (6)
Continuation 16648163
Provisional Application 62628752 · Feb 9, 2018
Provisional Application 62625575 · Feb 2, 2018
Provisional Application 62622551 · Jan 26, 2018
Provisional Application 62560992 · Sep 20, 2017
Related Publication 20220377385A1 · Nov 24, 2022
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