IP Library › Granted Patent US 12,568,206
Granted Patent B2
US 12,568,206 · App. 18/645,298 · Granted Mar 3, 2026

Video signal processing method and device using current picture reference

Inventors: Geonjung Ko (Seoul, KR); Dongcheol Kim (Suwon-Si, KR); Juhyung Son (Uiwang-Si, KR); Jaehong Jung (Seoul, KR); Jinsam Kwak (Anyang-Si, KR)
Assignee: VIDAXIO LLC
H04N19/105H04N19/174H04N19/176H04N19/186H04N19/593H04N19/96
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Quick Facts
Patent No.
US 12,568,206
App. No.
18/645,298
Granted
Mar 3, 2026
Kind
B2
Abstract

A video signal processing method comprises: determining a prediction mode of a current block; when the prediction mode of the current block is a Block Copy (BC) prediction mode referring to a current picture, decoding the current block, based on the BC prediction mode; and when the prediction mode of the current block is an inter prediction mode referring to at least one picture, decoding the current block, based on the inter prediction mode.

Claims (102)

1 . A video signal decoding device, the device comprising a processor,

wherein the processor is configured to:

determine whether a prediction mode of a current block is an inter prediction mode or an intra prediction mode based on a value of a prediction mode parameter,

determine whether the prediction mode of the current block is an Intra Block Copy (IBC) prediction mode based on a value of an IBC mode parameter,

when the prediction mode of the current block is the IBC prediction mode, decode the current block based on the IBC prediction mode and motion information for at least one location among a first set of spatial neighboring locations of the current block,

when the prediction mode of the current block is the inter prediction mode, decode the current block based on the inter prediction mode and motion information for at least one location among a second set of spatial neighboring locations of the current block,

wherein the first set of spatial neighboring locations of the current block is a part of the second set of spatial neighboring locations of the current block,

wherein whether the IBC mode parameter is parsed or not is determined based on a tree type of the current block,

when the prediction mode parameter is not parsed:

when a slice to which the current block belongs is an I slice, the value of the prediction mode parameter is inferred as a value indicating that the prediction mode of the current block is the intra prediction mode,

when the slice to which the current block belongs is a P slice of a B slice, the value of the prediction mode parameter is inferred as a value indicating that the prediction mode of the current block is the inter prediction mode, and

wherein the I slice is a slice that refers to a current picture as a reference picture, and the P slice or the B slice is a slice capable of referring to a picture other than the current picture as a reference picture.

2 . The video signal decoding device of claim 1 ,

wherein the first set of spatial neighboring locations of the current block does not include locations (xCb−1, yCb+cbHeight), and (xCb+cbWidth, yCb−1),

wherein the second set of spatial neighboring locations of the current block includes the locations (xCb−1, yCb+cbHeight), and (xCb+cbWidth, yCb−1),

wherein the cbWidth is a width of the current block and the cbHeight is a height of the current block,

wherein a top-left location of the current block is (xCb, yCb).

3 . The video signal decoding device of claim 2 ,

wherein the first set of spatial neighboring locations of the current block includes locations of (xCb−1, yCb+cbHeight−1) and (xCb+cbWidth−1, yCb−1),

wherein the second set of spatial neighboring locations of the current block further includes the locations (xCb−1, yCb+cbHeight−1), and (xCb+cbWidth−1, yCb−1).

4 . The video signal decoding device of claim 1 ,

when the IBC mode parameter is not parsed:

when the slice to which the current block belongs is the I slice, and signaling information of a higher level than the current block indicates that the IBC prediction mode is available, the value of the IBC mode parameter is inferred as a value indicating that the prediction mode of the current block is the IBC prediction mode,

when the slice to which the current block belongs is the P slice or the B slice, the value of the IBC mode parameter is inferred as a value indicating that the prediction mode of the current block is not the IBC prediction mode.

5 . The video signal decoding device of claim 4 ,

wherein the value of the IBC mode parameter is inferred based on a size of the current block and whether a skip mode is applied to the current block.

6 . The video signal decoding device of claim 5 ,

when the skip mode is applied to the current block and the size of the current block is a pre-configured size, the value of the IBC mode parameter is inferred as a value indicating that the prediction mode is the IBC prediction mode,

when i) the skip mode is not applied to the current block or the size of the current block is not the pre-configured size and ii) the slice to which the current block belongs is the P slice or the B slice, the value of the IBC mode parameter is inferred as a value indicating that the prediction mode is not the IBC prediction mode.

7 . The video signal decoding device of claim 6 ,

wherein the pre-configured size is 4×4.

8 . The video signal decoding device of claim 1 ,

when the tree type of the current block is a DUAL_TREE_CHROMA:

the IBC mode parameter is not parsed and the prediction mode of the current block is not the IBC prediction mode,

wherein the DUAL_TREE_CHROMA indicates processing of a chroma component block for which partitioning in a different method from a luma component block is available.

9 . The video signal decoding device of claim 1 ,

wherein when the prediction mode parameter is not parsed, the value of the prediction mode parameter is inferred based on a size of the current block.

10 . A video signal encoding device comprising a processor,

wherein the processor is configured to obtain a bitstream to be decoded by a decoder using a decoding method, the decoding method comprising:

determining whether a prediction mode of a current block is an inter prediction mode or an intra prediction mode based on a value of a prediction mode parameter;

determining whether the prediction mode of the current block is an Intra Block Copy (IBC) prediction mode based on a value of an IBC mode parameter;

when the prediction mode of the current block is the IBC prediction mode, decoding the current block based on the IBC prediction mode and motion information for at least one location among a first set of spatial neighboring locations of the current block;

when the prediction mode of the current block is the inter prediction mode, decoding the current block based on the inter prediction mode and motion information for at least one location among a second set of spatial neighboring locations of the current block,

wherein the first set of spatial neighboring locations of the current block is a part of the second set of spatial neighboring locations of the current block,

wherein whether the IBC mode parameter is parsed or not is determined based on a tree type of the current block,

when the prediction mode parameter is not parsed:

when a slice to which the current block belongs is an I slice, the value of the prediction mode parameter is inferred as a value indicating that the prediction mode of the current block is the intra prediction mode,

when the slice to which the current block belongs is a P slice of a B slice, the value of the prediction mode parameter is inferred as a value indicating that the prediction mode of the current block is the inter prediction mode, and

wherein the I slice is a slice that refers to a current picture as a reference picture, and the P slice or the B slice is a slice capable of referring to a picture other than the current picture as a reference picture.

11 . The video signal encoding device of claim 10 ,

wherein the first set of spatial neighboring locations of the current block does not include locations (xCb−1, yCb+cbHeight), and (xCb+cbWidth, yCb−1),

wherein the second set of spatial neighboring locations of the current block includes the locations (xCb−1, yCb+cbHeight), and (xCb+cbWidth, yCb−1),

wherein the cbWidth is a width of the current block and the cbHeight is a height of the current block,

wherein a top-left location of the current block is (xCb, yCb).

12 . The video signal encoding device of claim 11 ,

wherein the first set of spatial neighboring locations of the current block includes locations (xCb−1, yCb+cbHeight−1) and (xCb+cbWidth−1, yCb−1),

wherein the second set of spatial neighboring locations of the current block further includes the locations (xCb−1, yCb+cbHeight−1), and (xCb+cbWidth−1, yCb−1).

13 . The video signal encoding device of claim 10 ,

when the IBC mode parameter is not parsed:

when the slice to which the current block belongs is the I slice, and signaling information of a higher level than the current block indicates that the IBC prediction mode is available, the value of the IBC mode parameter is inferred as a value indicating that the prediction mode of the current block is the IBC prediction mode,

when the slice to which the current block belongs is the P slice or the B slice, the value of the IBC mode parameter is inferred as a value indicating that the prediction mode of the current block is not the IBC prediction mode.

14 . The video signal encoding device of claim 13 ,

wherein the value of the IBC mode parameter is inferred based on a size of the current block and whether a skip mode is applied to the current block.

15 . The video signal encoding device of claim 14 ,

when the skip mode is applied to the current block and the size of the current block is a pre-configured size, the value of the IBC mode parameter is inferred as a value indicating that the prediction mode is the IBC prediction mode,

when i) the skip mode is not applied to the current block or the size of the current block is not the pre-configured size and ii) the slice to which the current block belongs is the P slice or the B slice, the value of the IBC mode parameter is inferred as a value indicating that the prediction mode is not the IBC prediction mode.

16 . The video signal encoding device of claim 15 ,

wherein the pre-configured size is 4×4.

17 . The video signal encoding device of claim 10 ,

when the tree type of the current block is a DUAL_TREE_CHROMA:

the IBC mode parameter is not parsed and the prediction mode of the current block is not the IBC prediction mode,

wherein the DUAL_TREE_CHROMA indicates processing of a chroma component block for which partitioning in a different method from a luma component block is available.

18 . The video signal encoding device of claim 10 ,

wherein when the prediction mode parameter is not parsed, the value of the prediction mode parameter is inferred based on a size of the current block.

19 . A method of obtaining a bitstream, the method comprising:

determining whether to include a prediction mode parameter indicating a prediction mode of a current block is an inter prediction mode or an intra prediction mode in the bitstream;

determining whether to include an Intra Block Copy (IBC) mode parameter indicating the prediction mode of the current block is an IBC prediction mode in the bitstream;

when the prediction mode of the current block is the IBC prediction mode, encoding the current block based on the IBC prediction mode and motion information for at least one location among a first set of spatial neighboring locations of the current block;

when the prediction mode of the current block is the inter prediction mode, encoding the current block based on the inter prediction mode and motion information for at least one location among a second set of spatial neighboring locations of the current block,

wherein the first set of spatial neighboring locations of the current block is a part of the second set of spatial neighboring locations of the current block;

obtaining the bitstream including information for decoding the current block,

wherein whether the IBC mode parameter is included in the bitstream is determined based on a tree type of the current block,

when the prediction mode parameter is not included in the bitstream:

when a slice to which the current block belongs is an I slice, the prediction mode of the current block is the intra prediction mode,

when the slice to which the current block belongs is a P slice of a B slice, the prediction mode of the current block is the inter prediction mode, and

wherein the I slice is a slice that refers to a current picture as a reference picture, and the P slice or the B slice is a slice capable of referring to a picture other than the current picture as a reference picture.

20 . The method of claim 19 ,

wherein the first set of spatial neighboring locations of the current block does not include locations (xCb−1, yCb+cbHeight), and (xCb+cbWidth, yCb−1),

wherein the second set of spatial neighboring locations of the current block includes the locations (xCb−1, yCb+cbHeight), and (xCb+cbWidth, yCb−1),

wherein the cbWidth is a width of the current block and the cbHeight is a height of the current block,

wherein a top-left location of the current block is (xCb, yCb).

21 . A video signal decoding method, the video signal decoding method comprising:

determining whether a prediction mode of a current block is an inter prediction mode or an intra prediction mode based on a value of a prediction mode parameter;

determining whether the prediction mode of the current block is an Intra Block Copy (IBC) prediction mode based on a value of an IBC mode parameter;

when the prediction mode of the current block is the IBC prediction mode, decoding the current block based on the IBC prediction mode and motion information for at least one location among a first set of spatial neighboring locations of the current block;

when the prediction mode of the current block is the inter prediction mode, decoding the current block based on the inter prediction mode and motion information for at least one location among a second set of spatial neighboring locations of the current block,

wherein the first set of spatial neighboring locations of the current block is a part of the second set of spatial neighboring locations of the current block,

wherein whether the IBC mode parameter is parsed or not is determined based on a tree type of the current block,

when the prediction mode parameter is not parsed:

when a slice to which the current block belongs is an I slice, the value of the prediction mode parameter is inferred as a value indicating that the prediction mode of the current block is the intra prediction mode,

when the slice to which the current block belongs is a P slice of a B slice, the value of the prediction mode parameter is inferred as a value indicating that the prediction mode of the current block is the inter prediction mode, and

wherein the I slice is a slice that refers to a current picture as a reference picture, and the P slice or the B slice is a slice capable of referring to a picture other than the current picture as a reference picture.

Assignments (3)
CORRECTIVE ASSIGNMENT TO CORRECT THE RECORD BY REPLACING THE PREVIOUSLY RECORDED CONFIDENTIAL PURCHASE AGREEMENT PREVIOUSLY RECORDED ON REEL 73239 FRAME 166. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT. Recorded May 26, 2026
From: HUMAX CO., LTD.
To: ADVEXT IP LLC
Reel/Frame 075743/0001 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 13, 2026
From: ADVEXT IP LLC
To: VIDAXIO LLC
Reel/Frame 074323/0501 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 29, 2025
From: HUMAX CO., LTD.
To: ADVEXT IP LLC
Reel/Frame 073239/0166 →
Priority Claims (3)
KR 10-2018-0160432 · Dec 12, 2018 · national
KR 10-2019-0019512 · Feb 19, 2019 · national
KR 10-2019-0048097 · Apr 24, 2019 · national
Continuity (3)
Continuation 17343258 · Jun 9, 2021
Continuation PCTKR2019017639 · Dec 12, 2019
Related Publication 20240275953A1 · Aug 15, 2024
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Benjamin Bross, et al., Versatile Video Coding (Draft 6) , Joint Vid eo Experts Team (JVET) of ITU-T SG 16 WP 3 and ISO/IEC JTC 1/SC 29/WG 11,JVET-O2001-v9, Jul. 31, 2019. [cited by applicant]
Man-Shu Chiang, et al.,CE3-related: Chroma DM derivation for IBC and PCM, Joint Video Experts Team (JVET) of ITU-T SG 16 WP 3 and ISO/IEC JTC 1/SC 29/WG 11,JVET-O0275-v1, Jun. 25, 2019. [cited by applicant]
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Examination report under sections 12 & 13 of the Patents Act, 1970 and the Patents Rules, 2003 for Application No. 202127024933 from Intellectual Property India dated Jul. 20, 2022. [cited by applicant]
Notice of Reasons for Refusal for Japanese Patent Application No. 2021-534131 from Japan Patent Office dated Jul. 27, 2022. [cited by applicant]
Notice of Reasons for Refusal for Japanese Patent Application No. 2021-549112 from Japan Patent Office dated Sep. 30, 2022. [cited by applicant]
JVET-J0029.xlsm. Reference: HM16.16 Reference2:JEM7.0 Tested: Tencent. [cited by applicant]
JVET-J0029-r1.xlsm. Reference: HM16.16 Reference2:JEM7.0 Tested: Tencent. [cited by applicant]
JVET-O0651_Spec. Test 1: 8.4.4 Derivation process for chroma intra prediction mode Test 2: 8.4.4 Derivation process for chroma intra prediction mode. [cited by applicant]
JVET-O0651.xlsm Reference: VTM-5.0, CTC Tested: Test Note: BD-rate is computed using piece-wise cubic interpolation. [cited by applicant]
JCTVC-T0097-spec-text. Draft Text Specification. The proposed text changes based on the document JCTVC-S1005.doc for Intra BC deblocking in CE2 Test 4.2. [cited by applicant]
“Non-CE2: Block vector prediction method for intra block copy” Chao Pang, Vadim Seregin, Marta Karczewicz QUALCOMM (PPT). [cited by applicant]
BVP_WithTBVP_lossy.xlsm Reference:Anchor (SCM-3.0) Tested: Tested (Tnnnn) Note: BD-rate is computed using piece-wise cubic interpolation. [cited by applicant]
BVP_WithTBVP_lossless.xlsm Reference:Anchor (SCM-3.0) Tested:Tested (Tnnnn). [cited by applicant]
BVP_WithTBVP_420_lossy.xlsm Reference:Anchor ( ) Tested: Tested (SCM-3.0) Note: BD-rate is computed using piece-wise cubic interpolation. [cited by applicant]
BVP_WithTBVP_420_lossless.xlsm Reference:Anchor (SCM-3.0) Tested:Tested (Tnnnn). [cited by applicant]
BVP_WithoutTBVP_lossy.xlsm Reference:Anchor (SCM-3.0) Tested:Tested (Tnnnn) Note: BD-rate is computed using piece-wise cubic interpolation. [cited by applicant]
BVP_WithoutTBVP_lossless.xlsm Reference:Anchor (SCM-3.0) Tested:Tested (Tnnnn). [cited by applicant]
BVP_WithoutTBVP_420_lossy.xlsm Reference:Anchor ( ) Tested:Tested (SCM-3.0) Note: BD-rate is computed using piece-wise cubic interpolation. [cited by applicant]
BVP_WithoutTBVP_420_lossless.xlsm Reference:Anchor (SCM-3.0) Tested:Tested (Tnnnn). [cited by applicant]
Draft Text Specification(SCCE1_Test_3_1_IntraBC_BVP_spec_r1) The proposed text changes based on the document JCTVC-P1005 for the Intra BC prediction in SCCE1 Test 3.1. [cited by applicant]
SCCE1_Test_3_1_IntraBC_BVP_Test1_lossless.xlsm Reference:Anchor (SCM-1.0) Tested:Tested (Rnnnn). [cited by applicant]
SCCE1_Test_3_1_IntraBC_BVP_Test1_lossy.xlsm Reference:Anchor (SCM-1.0) Tested:Tested (Rnnnn) Note: BD-rate is computed using piece-wise cubic interpolation. [cited by applicant]
SCCE1_Test_3_1_IntraBC_BVP_Test2_lossless.xlsm Reference:Anchor (SCM-1.0) Tested:Tested (Rnnnn). [cited by applicant]
SCCE1_Test_3_1_IntraBC_BVP_Test2_lossy.xlsm Reference:Anchor (SCM-1.0) Tested:Tested (Rnnnn) Note: BD-rate is computed using piece-wise cubic interpolation. [cited by applicant]
SCCE1_Test_3_1_IntraBC_BVP_Test3_lossless.xlsm Reference:Anchor (SCM-1.0) Tested:Tested (Rnnnn). [cited by applicant]
SCCE1_Test_3_1_IntraBC_BVP_Test3_lossy.xlsm. Reference:Anchor (SCM-1.0) Tested:Tested (Rnnnn) Note: BD-rate is computed using piece-wise cubic interpolation. [cited by applicant]
Hearing notice from Indian Patent Office for Application 202127036546 dated May 7, 2024. [cited by applicant]
Notification on the grant of patent right for invention from China National Intellectual Property Administration for Application 201980082678.X dated May 7, 2024. [cited by applicant]
Joint Video Experts Team (JVET) of ITU-T SG 16 WP 3 and ISO/IEC JTC 1/SC 29/WG 11, 10th Meeting: San Diego, US, Apr. 10-20, 2018. Document: JVET-J0042-v3. Title: Intra block copy for intra-frame coding. Inventor: Xuguan… [cited by applicant]
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NOA for U.S. Appl. No. 17/401,849 from USPTO dated Oct. 22, 2024. [cited by applicant]
Request for the Submission of an Opinion for Application No. 10-2021-7017095 from Korean Intellectual Property Office dated Nov. 6, 2024. [cited by applicant]
Request for the Submission of an Opinion for Application No. 10-2021-7025556 from Korean Intellectual Property Office dated Nov. 11, 2024. [cited by applicant]
Extended European Search Report for Appl: 24167363.1-1207 from European Patent Office dated May 14, 2024. [cited by applicant]
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Decision to Grant a Patent for Appl: 2021-534131 from Japan Patent Office dated Jun. 7, 2024. [cited by applicant]
Non-final rejection for U.S. Appl. No. 17/343,258 from USPTO dated Jan. 19, 2023. [cited by applicant]
Final rejection for U.S. Appl. No. 17/343,258 from USPTO dated Jul. 27, 2023. [cited by applicant]
Notice of Allowance for U.S. Appl. No. 17/343,258 from USPTO dated Jan. 25, 2024. [cited by applicant]
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Notice of Allowance issued by the Japanese Patent Office in counterpart Patent Application No. 2024-191166, on Jul. 22, 2025. [cited by applicant]
Wei-Jung Chien, et al. , CE8-related: CPR mode signaling and interaction with inter coding tools , Joint Video Experts Team (JVET) of ITU-T SG 16 WP 3 and ISO/IEC JTC 1/SC 29/WG 11 , JVET-M0483-r2 , 13th Meeting: Marrak… [cited by applicant]
Xiaozhong Xu, Xiang Li, and Shan Liu , Non-CE8: CPR with chroma 4×4 sub-block size when dual-tree is on , Joint Video Experts Team (JVET) of ITU-T SG 16 WP 3 and ISO/IEC JTC 1/SC 29/WG 11 , JVET-M0544-v1 , 13th Meeting:… [cited by applicant]
First Office Action issued by Japanese Patent Office in counterpart Japanese Patent Application No. 2024-045270 on Mar. 25, 2025. [cited by applicant]
Notice of Allowance issued by U.S. Patent and Trademark Office in Counterpart U.S. Appl. No. 17/401,849 on Mar. 28, 2025. [cited by applicant]