IP Library › Granted Patent US 12,262,064
Granted Patent B2
US 12,262,064 · App. 17/745,053 · Granted Mar 25, 2025

Cross-plane filtering for chroma signal enhancement in video coding

Inventors: Jie Dong (San Diego, CA); Yuwen He (San Diego, CA); Yan Ye (San Diego, CA)
Assignee: InterDigital Madison Patent Holdings, SAS
H04N19/86H04N19/70H04N19/117H04N19/186H04N19/30
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Quick Facts
Patent No.
US 12,262,064
App. No.
17/745,053
Granted
Mar 25, 2025
Kind
B2
Abstract

Cross-plane filtering may be used to restore blurred edges and/or textures in one or both chroma planes using information from a corresponding luma plane. Adaptive cross-plane filters may be implemented. Cross-plane filter coefficients may be quantized and/or signaled such that overhead in a bitstream minimizes performance degradation. Cross-plane filtering may be applied to select regions of a video image (e.g., to edge areas). Cross-plane filters may be implemented in single-layer video coding systems and/or multi-layer video coding systems.

Claims (57)

1. A method for video encoding comprising:

obtaining a video signal, wherein the video signal comprises a first color component and a second color component;

obtaining a reconstructed first color component based on the first color component and obtaining a reconstructed second color component based on the second color component;

obtaining a cross-plane filter indication for modifying the reconstructed first color component based on the reconstructed second color component; and

including the cross-plane filter indication to a bitstream that is representative of the video signal.

2. The method of claim 1 , wherein the first color component comprises a chroma component, the reconstructed first color component comprises a reconstructed chroma component, the second color component comprises a luma component, and the reconstructed second color component comprises a reconstructed luma component.

3. The method of claim 1 , wherein the method further comprises:

applying a cross-plane filter to the reconstructed second color component to determine a color component offset associated with the reconstructed first color component; and

modifying the reconstructed first color component based on the color component offset.

4. The method of claim 1 , wherein the cross-plane filter indication is a first cross-plane filter indication, the video signal further comprises a third color component, and wherein the method further comprises:

obtaining a reconstructed third color component based on the third color component;

obtaining a second cross-plane filter indication for modifying the reconstructed first color component based on the reconstructed third color component; and

including the second cross-plane filter indication to the bitstream that is representative of the video signal.

5. The method of claim 4 , wherein the method further comprises:

applying a cross-plane filter to the reconstructed third color component to determine a color component offset associated with the reconstructed first color component; and

modifying the reconstructed first color component based on the color component offset.

6. The method of claim 1 , wherein the cross-plane filter indication indicates a current location associated with the video signal where a cross-plane filter is to be applied, wherein the cross-plane filter indication is generated based on the reconstructed second color component, the reconstructed first color component, and the first color component.

7. The method of claim 1 , wherein the method further comprises:

including a filter coefficient indication to the bitstream, wherein the filter coefficient indication indicates a filter coefficient associated with a cross-plane filter.

8. An apparatus for video encoding comprising:

a processor that is configured to:

obtain a video signal, wherein the video signal comprises a first color component and a second color component;

obtain a reconstructed first color component based on the first color component and obtain a reconstructed second color component based on the second color component;

obtain a cross-plane filter indication for modifying the reconstructed first color component based on the reconstructed second color component; and

include the cross-plane filter indication to a bitstream that is representative of the video signal.

9. The apparatus of claim 8 , wherein the first color component comprises a chroma component, the reconstructed first color component comprises a reconstructed chroma component, the second color component comprises a luma component, and the reconstructed second color component comprises a reconstructed luma component.

10. The apparatus of claim 8 , wherein the video signal further comprises a third color component, and wherein the processor is further configured to:

apply a cross-plane filter to the reconstructed second color component to determine a color component offset associated with the reconstructed first color component; and

modify the reconstructed first color component based on the color component offset.

11. The apparatus of claim 8 , wherein the cross-plane filter indication is a first cross-plane filter indication, the video signal further comprises a third color component, and wherein the processor is further configured to:

obtain a reconstructed third color component based on the third color component;

obtain a second cross-plane filter indication for modifying the reconstructed first color component based on the reconstructed third color component; and

include the second cross-plane filter indication to the bitstream that is representative of the video signal.

12. The apparatus of claim 11 , wherein the processor is further configured to:

apply a cross-plane filter to the reconstructed third color component to determine a color component offset associated with the reconstructed first color component; and

modify the reconstructed first color component based on the color component offset.

13. The apparatus of claim 8 , wherein the cross-plane filter indication indicates a current location associated with the video signal where a cross-plane filter is to be applied, wherein the cross-plane filter indication is generated based on the reconstructed second color component, the reconstructed first color component, and the first color component.

14. The apparatus of claim 8 , wherein the processor is further configured to:

include a filter coefficient indication to the bitstream, wherein the filter coefficient indication indicates a filter coefficient associated with a cross-plane filter.

15. A non-transitory computer readable medium including instructions for video encoding, the instructions causing a processor to perform:

obtaining a video signal, wherein the video signal comprises a first color component and a second color component;

obtaining a reconstructed first color component based on the first color component and obtaining a reconstructed second color component based on the second color component;

obtaining a cross-plane filter indication for modifying the reconstructed first color component based on the reconstructed second color component; and

including the cross-plane filter indication to a bitstream that is representative of the video signal.

16. The non-transitory computer readable medium of claim 15 , wherein the first color component comprises a chroma component, the reconstructed first color component comprises a reconstructed chroma component, the second color component comprises a luma component, and the reconstructed second color component comprises a reconstructed luma component.

17. The non-transitory computer readable medium of claim 15 , wherein the instructions further cause the processor to perform:

applying a cross-plane filter to the reconstructed second color component to determine a color component offset associated with the reconstructed first color component; and

modifying the reconstructed first color component based on the color component offset.

18. The non-transitory computer readable medium of claim 15 , wherein the cross-plane filter indication is a first cross-plane filter indication, the video signal further comprises a third color component, and wherein the instructions further cause the processor to perform:

obtaining a reconstructed third color component based on the third color component;

obtaining a second cross-plane filter indication for modifying the reconstructed first color component based on the reconstructed third color component; and

including the second cross-plane filter indication to the bitstream that is representative of the video signal;

applying a cross-plane filter to the reconstructed third color component to determine a color component offset associated with the reconstructed first color component; and

modifying the reconstructed first color component based on the color component offset.

19. The non-transitory computer readable medium of claim 15 , wherein the cross-plane filter indication indicates a current location associated with the video signal where a cross-plane filter is to be applied, wherein the cross-plane filter indication is generated based on the reconstructed second color component, the reconstructed first color component, and the first color component.

20. The non-transitory computer readable medium of claim 15 , wherein the instructions further cause the processor to perform:

including a filter coefficient indication to the bitstream, wherein the filter coefficient indication indicates a filter coefficient associated with a cross-plane filter.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 21, 2024
From: VID SCALE, INC.
To: INTERDIGITAL MADISON PATENT HOLDINGS, SAS
Reel/Frame 069431/0334 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 20, 2024
From: DONG, JIE; HE, YUWEN; YE, YAN
To: VID SCALE, INC.
Reel/Frame 069345/0909 →
Continuity (8)
Continuation 17010786 · Sep 2, 2020
Continuation 16459256 · Jul 1, 2019
Continuation 14039429 · Sep 27, 2013
Provisional Application 61845792 · Jul 12, 2013
Provisional Application 61778218 · Mar 12, 2013
Provisional Application 61762611 · Feb 8, 2013
Provisional Application 61707682 · Sep 28, 2012
Related Publication 20220286712A1 · Sep 8, 2022
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