Image encoding/decoding apparatus and method to which filter selection by precise units is applied
OwnerChung Ku Yie, Min Sung Kim +1inventors
InventorsChung Ku Yie, Min Sung Kim, Ui Ho Lee
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Abstract
According to the present invention, an image encoding/decoding method involves selecting, for units which are more precise than picture units, interpolation filters to be used in a motion compensated inter prediction to calculate sub-pixel values, wherein said precise units include at least one of a slice unit and a partition unit. Thus, encoding precision may be improved in a high resolution image having high definition (HD) or greater resolution.
Claims20
A method of encoding an image, the method comprising:
- generating a prediction unit for inter prediction of an input image;
- performing motion compensation inter prediction of the prediction unit;
- and
- selecting at least one of a filter used for the motion compensation inter prediction and an Adaptive Loop Filter (ALF) after a deblocking filter on a more precise unit basis than a picture unit.
A method of decoding an image, the method comprising:
- entropy decoding received bitstream, performing inverse quantization and inverse transformation of a residual, and restoring the residual;
- generating a prediction unit using prediction unit information and a motion parameter;
- extracting encoded filter information by selecting on a more precise unit basis than a picture unit, wherein the filter information comprises at least one of a filter index and a filter coefficient;
- and
- restoring an image by adding a residual to the prediction unit in which inter prediction is performed by performing inter prediction of the prediction unit.
An image decoding apparatus, comprising:
- an inverse quantization unit and inverse transformation unit that perform inverse quantization and inverse transformation of a residual by entropy decoding received bitstream and that restore the residual;
- a motion compensation unit that generates a prediction unit using prediction unit information and a motion parameter;
- and
- an adder that restores an image by adding the residual to the prediction unit,
- wherein the image decoding apparatus extracts filter information encoded by selecting on a more precise unit basis than a picture unit, wherein the filter information comprises at least one of a filter index and a filter coefficient.
Dependencies are inferred from the claim text.