US 2020/0221122 A1 · MOTION-COMPENSATION PREDICTION BASED ON BI-DIRECTIONAL OPTICAL FLOW

Abstract

A device may determine whether to enable or disable bi-directional optical flow (BIO) for a current coding unit (CU) (e.g., block and/or sub-block). Prediction information for the CU may be identified and may include prediction signals associated with a first reference block and a second reference block (e.g., or a first reference sub-block and a second reference sub-block). A prediction difference may be calculated and may be used to determine the similarity between the two prediction signals. The CU may be reconstructed based on the similarity. For example, whether to reconstruct the CU with BIO enabled or BIO disabled may be based on whether the two prediction signals are similar, it may be determined to enable BIO for the CU when the two prediction signals are determined to be dissimilar. For example, the CU may be reconstructed with BIO disabled when the two prediction signals are determined to be similar.

Claims15

Dependent claims

A device for video data coding, comprising:

a processor, the processor configured at least to:
identify prediction information for a current coding unit, wherein the prediction information comprises a first prediction signal associated with a first reference block and a second prediction signal associated with a second reference block;
calculate a prediction difference between the first prediction signal and the second prediction signal;
determine whether the first prediction signal and the second prediction signal are dissimilar based on the calculated prediction difference;
and
reconstruct the current coding unit based on the determination of whether the first prediction signal and the second prediction signal are dissimilar, wherein bi-directional optical flow (BIO) is enabled for the current coding unit based on the determination that the first prediction signal and the second prediction signal are dissimilar, and BIO is disabled for the current coding unit based on the determination that the first prediction signal and the second prediction signal are not dissimilar.

3 more elements

A method for video data coding, comprising:

identifying prediction information for a current coding unit, wherein the prediction information comprises a first prediction signal associated with a first reference block and a second prediction signal associated with a second reference block;
calculating a prediction difference between the first prediction signal and the second prediction signal;
determining whether the first prediction signal and the second prediction signal are dissimilar based on the calculated prediction difference;
and
reconstructing the current coding unit based on the determination of whether the first prediction signal and the second prediction signal are dissimilar, wherein bi-directional optical flow (BIO) is enabled for the current coding unit based on the determination that the first prediction signal and the second prediction signal are dissimilar, and BIO is disabled for the current coding unit based on the determination that the first prediction signal and the second prediction signal are not dissimilar.

2 more elements

Dependencies are inferred from the claim text.

Motion-compensation prediction based on bi-directional optical flow

Life of this patent

Motion-compensation prediction based on bi-directional optical flow

Life of this patent

Abstract

Claims15