US 11,153,602 B2 · Generalized bi-prediction for video coding with reduced coding complexity

Abstract

Exemplary embodiments include systems and methods for coding a video comprising a plurality of pictures including a current picture, a first reference picture, and a second reference picture, where each picture includes a plurality of blocks. In one method, for at least a current block in the current picture, a number of available bi-prediction weights is determined based at least in part on a temporal layer and/or a quantization parameter of the current picture. From among available bi-prediction weights a pair of weights are identified. Using the identified weights, the current block is then predicted as a weighted sum of a first reference block in the first reference picture and a second reference block in the second reference picture. Encoding techniques are also described for efficient searching and selection of a pair of bi-prediction weights to use for prediction of a block.

Claims13

Dependent claims

A video decoding method comprising:

determining a number of available bi-prediction weights based at least in part on a temporal layer of a current picture in a hierarchical prediction structure, wherein the number of available bi-prediction weights decreases for increasing temporal layers;
from among the determined number of available bi-prediction weights, identifying a first weight and a second weight;
and
predicting a current block in the current picture as a weighted sum of a first reference block in a first reference picture and a second reference block in a second reference picture, wherein the first reference block is weighted by the first weight and the second reference block is weighted by the second weight.

1 more element

Dependencies are inferred from the claim text.

Generalized bi-prediction for video coding with reduced coding complexity

Life of this patent

Generalized bi-prediction for video coding with reduced coding complexity

Life of this patent

Abstract

Claims13