Einzeltreffer — DigiBib

The various embodiments described herein include methods and systems for coding video. In one aspect, a method includes obtaining encoded video data comprising a plurality of blocks and obtaining a motion vector predictor (MVP) candidate block from a MVP list based on a MVP index. The method further includes in accordance with a determination that a block of the plurality of blocks is designated for a warp extend mode, determining whether the MVP candidate block is suitable for the warp extend mode. The method also includes, in accordance with a determination that the MVP candidate block is not suitable for the warp extend mode, identifying a backup MVP candidate block that is suitable for the warp extend mode. The method further includes obtaining a warp model from the backup MVP candidate block; and performing a warp extend operation on the block using the warp model.

Titel:	SYSTEMS AND METHODS FOR IMPROVING WARP EXTEND AND WARP DELTA SIGNALING WITH BACKUP CANDIDATES
Link:	Zum Volltext
Veröffentlichung:	2024
Medientyp:	Patent
Sonstiges:	Nachgewiesen in: USPTO Patent Applications Sprachen: English Document Number: 20240171767 Publication Date: May 23, 2024 Appl. No: 18/124764 Application Filed: March 22, 2023 Claim: 1. A method of video decoding performed at a computing system having memory and one or more processors, the method comprising: obtaining encoded video data comprising a plurality of blocks; obtaining a motion vector predictor (MVP) candidate block from a MVP list based on a MVP index; in accordance with a determination that a block of the plurality of blocks is designated for a warp extend mode, determining whether the MVP candidate block is suitable for the warp extend mode; in accordance with a determination that the MVP candidate block is not suitable for the warp extend mode, identifying a backup MVP candidate block that is suitable for the warp extend mode; obtaining a warp model from the backup MVP candidate block; and performing a warp extend operation on the block using the warp model. Claim: 2. The method of claim 1, further comprising: in accordance with a determination that the MVP candidate block is suitable for the warp extend mode, obtaining a second warp model from the MVP candidate block; and performing a warp extend operation on the block using the second warp model. Claim: 3. The method of claim 1, wherein obtaining the warp model from the backup MVP candidate block comprises deriving the warp model from the backup MVP candidate block. Claim: 4. The method of claim 1, wherein obtaining the warp model from the backup MVP candidate block comprises using the backup MVP candidate block as the warp model. Claim: 5. The method of claim 1, wherein the backup MVP candidate block is identified from a set of spatial neighbor blocks for the block. Claim: 6. The method of claim 1, wherein the MVP candidate block is determined not to be suitable based on one or more of: the MVP candidate block does not exist; the MVP candidate block is not in a same tile as the block; and the MVP candidate block does not use a warp model. Claim: 7. The method of claim 1, further comprising: in accordance with a determination that the block of the plurality of blocks is designated for a warp delta mode, determining whether the MVP candidate block is suitable for the warp delta mode; in accordance with a determination that the MVP candidate block is not suitable for the warp delta mode, obtaining the warp model from the backup MVP candidate block; and performing a warp delta operation on the block using the warp model. Claim: 8. The method of claim 1, further comprising, in accordance with a determination that the MVP candidate block is not suitable for the warp extend mode, scanning a set of spatial neighbor blocks in a predefined order to identify a first available inter-coded block as the backup MVP candidate block. Claim: 9. The method of claim 1, further comprising determining whether the block is coded for a near motion vector (NEARMV) mode or a new motion vector (NEWMV) mode; in accordance with a determination that the block is coded for the NEWMV mode, the backup MVP candidate block is identified in further accordance with a determination that the backup MVP candidate block is designated as inter-coded and has a same reference frame as the block; and in accordance with a determination that the block is coded for NEARMV mode, the backup MVP candidate block is identified in further accordance with a determination that the backup MVP candidate block is designated as warp mode, inter-coded, and has a same reference picture as the block. Claim: 10. The method of claim 1, further comprising: in accordance with a determination that a second block of the plurality of blocks is designated for a warp extend mode, determining whether the MVP candidate block is suitable for the warp extend mode; and in accordance with a determination that the MVP candidate block is not suitable for the warp extend mode and a determination that a backup MVP candidate block was not identified, performing a warp extend operation on the second block using a global warp model. Claim: 11. The method of claim 1, wherein the backup MVP candidate block is a non-adjacent spatial neighbor block for the block. Claim: 12. The method of claim 1, wherein the backup MVP candidate block is a history neighbor block for the block. Claim: 13. The method of claim 1, wherein the backup MVP candidate block is a temporal co-located block for the block. Claim: 14. The method of claim 1, further comprising identifying a second backup MVP candidate block, wherein the second backup MVP candidate block is one of: the MVP candidate block, an adjacent spatial neighbor block of the block, or a non-adjacent spatial neighbor block. Claim: 15. The method of claim 14, wherein the warp model is derived from the backup candidate block and the second backup MVP candidate block. Claim: 16. A computing system, comprising: control circuitry; memory; and one or more sets of instructions stored in the memory and configured for execution by the control circuitry, the one or more sets of instructions comprising instructions for: obtaining encoded video data comprising a plurality of blocks; obtaining a motion vector predictor (MVP) candidate block from a MVP list based on a MVP index; in accordance with a determination that a block of the plurality of blocks is designated for a warp extend mode, determining whether the MVP candidate block is suitable for the warp extend mode; in accordance with a determination that the MVP candidate block is not suitable for the warp extend mode, identifying a backup MVP candidate block that is suitable for the warp extend mode; obtaining a warp model from the backup MVP candidate block; and performing a warp extend operation on the block using the warp model. Claim: 17. The computing system of claim 16, wherein the one or more sets of instructions further comprise instructions for, in accordance with a determination that the MVP candidate block is not suitable for the warp extend mode, scanning a set of spatial neighbor blocks in a predefined order to identify a first available inter-coded block as the backup MVP candidate block. Claim: 18. The computing system of claim 16, wherein the one or more sets of instructions further comprise instructions for identifying a second backup MVP candidate block, wherein the second backup candidate block is one of: the MVP candidate block, an adjacent spatial neighbor block of the block, or a non-adjacent spatial neighbor block. Claim: 19. A non-transitory computer-readable storage medium storing one or more sets of instructions configured for execution by a computing device having control circuitry and memory, the one or more sets of instructions comprising instructions for: obtaining encoded video data comprising a plurality of blocks; obtaining a motion vector predictor (MVP) candidate block from a MVP list based on a MVP index; in accordance with a determination that a block of the plurality of blocks is designated for a warp extend mode, determining whether the MVP candidate block is suitable for the warp extend mode; in accordance with a determination that the MVP candidate block is not suitable for the warp extend mode, identifying a backup MVP candidate block that is suitable for the warp extend mode; obtaining a warp model from the backup MVP candidate block; and performing a warp extend operation on the block using the warp model. Claim: 20. The non-transitory computer-readable storage medium of claim 19, wherein the one or more sets of instructions further comprise instructions for identifying a second backup MVP candidate block, wherein the second backup candidate block is one of: the MVP candidate block, an adjacent spatial neighbor block of the block, or a non-adjacent spatial neighbor block. Current International Class: 04; 04; 04; 04; 04; 04; 04

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SYSTEMS AND METHODS FOR IMPROVING WARP EXTEND AND WARP DELTA SIGNALING WITH BACKUP CANDIDATES