Method and apparatus for encoding/decoding image information
First Claim
Patent Images
1. An apparatus of decoding video applying deblocking filtering, the apparatus comprising:
- dequantization module for dequantizing entropy decoded video information to output transform coefficients;
transform module for transforming the transform coefficients into residual samples;
prediction module for producing prediction samples based on a inter prediction or a intra prediction; and
filtering module for performing a deblocking filtering on reconstructed samples along a boundary of a deblocking filtering unit, wherein the reconstructed samples are derived using the residual samples and the prediction samples,wherein the filtering modulederives a boundary strength (bS) of a bS setting unit in the current picture;
determines whether deblocking filtering is to be applied when the derived bS is larger than 0;
determines whether strong filtering is to be applied or weak filtering is to be applied when the deblocking filtering is determined to be applied; and
applies a strong filtering or a weak filtering according to the determination on whether strong filtering is to be applied or weak filtering is to be applied,wherein the bS is derived for the boundary of the bS setting unit which overlaps a boundary of the deblocking filtering unit, andwherein the deblocking filtering unit is an 8×
8 pixel block and the bS setting unit is a 4×
4 pixel block.
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Abstract
The present invention relates to a deblocking filtering method, a method for inducing bs (boundary strength) therefor, and a method and an apparatus for encoding/decoding using the same. The method for inducing the bS of the present invention comprises the steps of: inducing a boundary of a deblocking filtering unit block as a unit block for applying the deblocking filtering; and setting the bS according to each bS setting unit block within the deblocking filtering unit block, wherein the bS setting step can set a bS value for a target boundary corresponding to a boundary of the deblocking filtering unit block as the bs setting unit block.
37 Citations
9 Claims
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1. An apparatus of decoding video applying deblocking filtering, the apparatus comprising:
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dequantization module for dequantizing entropy decoded video information to output transform coefficients; transform module for transforming the transform coefficients into residual samples; prediction module for producing prediction samples based on a inter prediction or a intra prediction; and filtering module for performing a deblocking filtering on reconstructed samples along a boundary of a deblocking filtering unit, wherein the reconstructed samples are derived using the residual samples and the prediction samples, wherein the filtering module derives a boundary strength (bS) of a bS setting unit in the current picture; determines whether deblocking filtering is to be applied when the derived bS is larger than 0; determines whether strong filtering is to be applied or weak filtering is to be applied when the deblocking filtering is determined to be applied; and applies a strong filtering or a weak filtering according to the determination on whether strong filtering is to be applied or weak filtering is to be applied, wherein the bS is derived for the boundary of the bS setting unit which overlaps a boundary of the deblocking filtering unit, and wherein the deblocking filtering unit is an 8×
8 pixel block and the bS setting unit is a 4×
4 pixel block. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of decoding video applying deblocking filtering, the method comprising:
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dequantizing entropy decoded video information to output transform coefficients; transforming the transform coefficients into residual samples; producing prediction samples based on a inter prediction or a intra prediction; and performing a deblocking filtering on reconstructed samples along a boundary of a deblocking filtering unit, wherein the reconstructed samples are derived using the residual samples and the prediction samples, wherein the step of performing the deblocking filtering includes deriving a boundary strength (bS) of a bS setting unit in the current picture; determining whether deblocking filtering is to be applied when the derived bS is larger than 0; determining whether strong filtering is to be applied or weak filtering is to be applied when the deblocking filtering is determined to be applied; and applying a strong filtering or a weak filtering according to the determination on whether strong filtering is to be applied or weak filtering is to be applied, wherein the bS is derived for the boundary of the bS setting unit which overlaps a boundary of the deblocking filtering unit, and wherein the deblocking filtering unit is an 8×
8 pixel block and the bS setting unit is a 4×
4 pixel block.
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Specification