Method and apparatus for video coding
AssigneeSiemens Aktiengesellschaft
InventorAndre Kaup
Life of this patent
Estimating the term…
Abstract
In uniform superposition of two predictions toward a weighted superposition, such as in coding B frames, weighting is based on reliability of a reference picture used for determination of the prediction. Since there is a relationship between the reliability and the respective quantization parameter, coupling to the quantization parameter that is also known in the receiver also can be effected advantageously.
Claims36
A method for video coding, comprising:
- assigning different weights to at least two reference pictures situated in an arbitrary temporal position before or after at least one predicted picture of a picture sequence;
- and
- calculating the at least one predicted picture by weighted averaging of the at least two reference pictures.
At least one computer readable medium storing at least one program embodying a method for video coding, said method comprising:
- assigning different weights to at least two reference pictures situated in an arbitrary temporal position before or after at least one predicted picture of a picture sequence;
- and
- calculating the at least one predicted picture by weighted averaging of the at least two reference pictures.
An apparatus for video coding, comprising:
- a device to calculate at least one predicted picture of a picture sequence by weighted averaging of at least two reference pictures situated in an arbitrary temporal position before or after the at least one predicted picture and assigned different weights.
The apparatus as claimed in claim 35, wherein said device uses a block for prediction which simultaneously superposes a plurality of coded individual blocks in a respective reference picture, and forms a weight of the block used for the prediction either from an inverse average value of the quantization level width of individual blocks or inversely with respect to a largest value of quantization levels.
Dependencies are inferred from the claim text.