Video encoding and decoding method and device using said method
AssigneeIntellectual Discovery Co., Ltd.
InventorsDong Gyu SIM, Hyun Ho JO, Sung Eun YOO
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Abstract
The present invention minimizes the clipping of a pixel value in upsampling and interpolation filter processes in reference to a restoration image of a reference layer by an enhancement layer in an SVC decoder and thus minimizes a decrease in picture quality. Also, by adjusting and limiting the motion vector of the enhancement layer to the position of an integer pixel when deriving a differential coefficient of the reference layer by using a motion vector of the enhancement layer in the GRP process, it is possible to create a differential coefficient without performing additional interpolation on the image of the reference layer.
Claims16
1-30. (canceled)
A video decoding method, comprising:
- restoring an image of a reference layer corresponding to an enhancement layer;
- up-sampling the restored image of the reference layer according to a first attribute of the enhancement layer;
- storing the up-sampled image in a reference image middle buffer with a pixel depth not down-scaled;
- and
- interpolation-filtering the stored image according to a second attribute of the enhancement layer.
A video decoding method, comprising:
- restoring an image of a reference layer corresponding to an enhancement layer;
- inducing a prediction coefficient for the enhancement layer based on the restored image;
- up-sampling the restored image of the reference layer;
- and
- interpolation-filtering the up-sampled image.
A video decoding method, comprising:
- restoring an image of a reference layer corresponding to an enhancement layer;
- adjusting an accuracy for a motion vector of the enhancement layer to an integer position;
- up-sampling the restored image of the reference layer;
- and
- storing the up-sampled image in an inter-layer reference image buffer.
Dependencies are inferred from the claim text.