System and method for combined inter and intra prediction

Patent metadata

Field	Value
Publication number	US-12457358-B2
Application number	US-202418631007-A
Country	US
Kind code	B2
Filing date	Apr 9, 2024
Priority date	Jan 9, 2019
Publication date	Oct 28, 2025
Grant date	Oct 28, 2025

Abstract

A method for video coding is provided. The method includes: determining that a combined inter and intra prediction mode is applied to a current coding block; generating an inter prediction of the current coding block based on an inter prediction mode; generating an intra prediction of the current coding block based on an intra prediction mode; generating a final prediction of the current coding block based on the inter prediction and the intra prediction; and determining that a prediction mode of the current coding block is treated as one unified mode when constructing a most probable mode (MPM) list of a neighboring coding block, the unified mode being predefined as an inter mode, or being predefined as an intra mode.

First claim

What is claimed is:

1. A method of video coding, comprising:
determining that a combined inter and intra prediction mode is applied to a current coding block;
generating an inter prediction of the current coding block based on an inter prediction mode;
generating an intra prediction of the current coding block based on an intra prediction mode;
generating a final prediction of the current coding block based on the inter prediction and the intra prediction; and
determining that a prediction mode of the current coding block is treated as one unified mode when constructing a most probable mode (MPM) list of a neighboring coding block, the unified mode being predefined as an inter mode, or being predefined as an intra mode.

2. The method of claim 1 , wherein generating the inter prediction of the current coding block based on the inter prediction mode comprises:
generating the inter prediction of the current coding block based on at least one motion vector from a current picture to at least one reference picture of a reference picture list respectively.

3. The method of claim 2 , wherein the reference picture list is a first reference picture list L0 when the inter prediction of the current coding block is performed from one reference picture in the reference picture list L0.

4. The method of claim 2 , wherein the reference picture list is a second reference picture list L1 when the inter prediction of the current coding block is performed from one reference picture in the reference picture list L1.

5. The method of claim 2 , wherein the reference picture list is the one which is associated with the one first reference picture in a first reference list L0 or the one second reference picture list L1 which has a smaller picture order count (POC) distance to the current picture when the inter prediction of the current coding block is performed from the one first reference picture and the one second reference picture.

6. The method of claim 1 , wherein generating the intra prediction of the current coding block based on the intra prediction mode comprises:
generating the intra prediction of the current coding block based on an intra PLANAR prediction mode.

7. The method of claim 1 , wherein a bidirectional optical flow (BDOF) operation is disabled for the current coding block.

8. A video coding device, comprising one or more processors and one or more storages coupled to the one or more processors,
wherein the video coding device is configured to perform operations comprising:
determining that a combined inter and intra prediction mode is applied to a current coding block;
generating an inter prediction of the current coding block based on an inter prediction mode;
generating an intra prediction of the current coding block based on an intra prediction mode;
generating a final prediction of the current coding block based on the inter prediction and the intra prediction; and
determining that a prediction mode of the current coding block is treated as one unified mode when constructing a most probable mode (MPM) list of a neighboring coding block, the unified mode being predefined as an inter mode, or being predefined as an intra mode.

9. The video coding device of claim 8 , wherein generating the inter prediction of the current coding block based on the inter prediction mode comprises:
generating the inter prediction of the current coding block based on at least one motion vector from a current picture to at least one reference picture of a reference picture list respectively.

10. The video coding device of claim 9 , wherein the reference picture list is a first reference picture list L0 when the inter prediction of the current coding block is performed from one reference picture in the reference picture list L0.

11. The video coding device of claim 9 , wherein the reference picture list is a second reference picture list L1 when the inter prediction of the current coding block is performed from one reference picture in the reference picture list L1.

12. The video coding device of claim 9 , wherein the reference picture list is associated with the one first reference picture in a first reference list L0 or the one second reference picture list L1 which has a smaller picture order count (POC) distance to the current picture when the inter prediction of the current coding block is performed from the one first reference picture and the one second reference picture.

13. The video coding device of claim 8 , wherein generating the intra prediction of the current coding block based on the intra prediction mode comprises:
generating the intra prediction of the current coding block based on an intra PLANAR prediction mode.

14. The video coding device of claim 8 , wherein a bidirectional optical flow (BDOF) operation is disabled for the current coding block.

15. A method for storing a bitstream, comprising:
performing an encoding method to generate a bitstream; and
storing the bitstream on a non-transitory computer readable storage medium,
wherein the encoding method comprises:
determining that a combined inter and intra prediction mode is applied to a current coding block;
generating an inter prediction of the current coding block based on an inter prediction mode;
generating an intra prediction of the current coding block based on an intra prediction mode;
generating a final prediction of the current coding block based on the inter prediction and the intra prediction; and
determining that a prediction mode of the current coding block is treated as one unified mode when constructing a most probable mode (MPM) list of a neighboring coding block, the unified mode being predefined as an inter mode, or being predefined as an intra mode.

16. The method of claim 15 , wherein generating the inter prediction of the current coding block based on the inter prediction mode comprises:
generating the inter prediction of the current coding block based on at least one motion vector from a current picture to at least one reference picture of a reference picture list respectively.

17. The method of claim 16 , wherein the reference picture list is a first reference picture list L0 when inter prediction of the current coding block is performed from one reference picture in the reference picture list L0.

18. The method of claim 16 , wherein the reference picture list is a second reference picture list L1 when inter prediction of the current coding block is performed from one reference picture in the reference picture list L1.

19. The method of claim 15 , generating the intra prediction of the current coding block based on the intra prediction mode comprises:
generating the intra prediction of the current coding block based on an intra PLANAR prediction mode.

20. The method of claim 15 , wherein a bidirectional optical flow (BDOF) operation is disabled for the current coding block.

Assignees

• Beijing Dajia Internet Information Tech Co Ltd

Inventors

• Xiu Xiaoyu
• Chen Yi-Wen
• Wang Xianglin

Classifications

• H04N19/159 Primary

  Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction · CPC title

• H04N19/132

  Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking · CPC title

• H04N19/105

  Selection of the reference unit for prediction within a chosen coding or prediction mode, e.g. adaptive choice of position and number of pixels used for prediction · CPC title

• H04N19/176

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

• H04N19/577

  Motion compensation with bidirectional frame interpolation, i.e. using B-pictures · CPC title