Image decoding device, image decoding method, and image encoding device
AssigneeSharp Kabushiki Kaisha
InventorsTomoyuki YAMAMOTO, Tomohiro IKAI, Yukinobu YASUGI
Life of this patent
Estimating the term…
Abstract
To achieve a reduction in the amount of coding taken in the use of an asymmetric partition and to implement efficient encoding/decoding processes exploiting the characteristics of the asymmetric partition. An image decoding device includes a motion compensation parameter derivation unit configured to derive a motion compensation parameter indicating either a uni-prediction scheme or a bi-prediction scheme. In a case that a prediction unit has a size less than or equal to a predetermined value, the motion compensation parameter derivation unit is configured to derive the motion compensation parameter by switching between the prediction schemes.
Claims6
1-8. (canceled)
An image decoding device for decoding an image in a prediction unit using, as an inter-frame prediction scheme, a uni-prediction scheme in which one reference image is referred to or a bi-prediction scheme in which two reference images are referred to, the image decoding device comprising:
- a motion compensation parameter derivation unit configured to derive a motion compensation parameter indicating one of the uni-prediction scheme and the bi-prediction scheme, wherein
- in a case where the prediction unit has a size less than or equal to a certain value,
- the motion compensation parameter derivation unit derives the motion compensation parameter by switching the prediction scheme to the uni-prediction scheme.
An image decoding method for decoding an image in a prediction unit using, as an inter-frame prediction scheme, a uni-prediction scheme in which one reference image is referred to or a bi-prediction scheme in which two reference images are referred to, the image decoding method comprising the steps of:
- deriving a motion compensation parameter indicating one of the uni-prediction scheme and the bi-prediction scheme;
- and
- determining whether or not the prediction unit has a size less than or equal to a certain value, wherein
- the step of deriving a motion compensation parameter includes deriving the motion compensation parameter by switching the prediction scheme to the uni-prediction scheme in a case where the size of the prediction unit is less than or equal to the certain value.
Dependencies are inferred from the claim text.