Method and apparatus for encoding/decoding image information
First Claim
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1. A deblocking filtering method, by a decoding apparatus, the method comprising:
- deriving a boundary of a deblocking filtering unit block which is a unit block for which deblocking filtering is performed in a reconstructed current picture;
setting a boundary strength (bS) of a boundary of a bS setting unit block in the reconstructed current picture; and
applying deblocking filtering on the boundary of the deblocking filtering unit block based on the bS,wherein the step of setting the bS includes setting a bS value for a target boundary which is an overlapped boundary of the bS setting unit block and the deblocking filtering unit block,wherein the step of applying the deblocking filtering includes determining whether the deblocking filtering is applied to a luma sample on the basis of the bS value and whether the deblocking filtering is applied to a chroma sample on the basis of the bS value,wherein the bS value is set as a value among 0, 1 and 2,wherein it is determined that the deblocking filtering is applied to the luma sample when the bS value is greater than a first threshold value which is 0, and it is determined that the deblocking filtering is applied to the chroma sample when the bS value is greater than a second threshold value which is 1,wherein when the bS value is equal to 1, the deblocking filtering is applied to the luma sample and the deblocking filtering is not applied to the chroma sample.
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Abstract
A deblocking filtering method, a boundary strength (bS) deriving method, and encoding/decoding method and apparatus using the methods are provided. The bS deriving method includes the steps of: deriving a boundary of a deblocking filtering unit block which is a unit block on which deblocking filtering is performed; and setting a bS for each bS setting unit block in the deblocking filtering unit block. Here, the step of setting the bS includes setting a bS value of a target boundary corresponding to the boundary of the deblocking filtering unit block as the bS setting unit block.
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Citations
17 Claims
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1. A deblocking filtering method, by a decoding apparatus, the method comprising:
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deriving a boundary of a deblocking filtering unit block which is a unit block for which deblocking filtering is performed in a reconstructed current picture; setting a boundary strength (bS) of a boundary of a bS setting unit block in the reconstructed current picture; and applying deblocking filtering on the boundary of the deblocking filtering unit block based on the bS, wherein the step of setting the bS includes setting a bS value for a target boundary which is an overlapped boundary of the bS setting unit block and the deblocking filtering unit block, wherein the step of applying the deblocking filtering includes determining whether the deblocking filtering is applied to a luma sample on the basis of the bS value and whether the deblocking filtering is applied to a chroma sample on the basis of the bS value, wherein the bS value is set as a value among 0, 1 and 2, wherein it is determined that the deblocking filtering is applied to the luma sample when the bS value is greater than a first threshold value which is 0, and it is determined that the deblocking filtering is applied to the chroma sample when the bS value is greater than a second threshold value which is 1, wherein when the bS value is equal to 1, the deblocking filtering is applied to the luma sample and the deblocking filtering is not applied to the chroma sample. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A deblocking filtering method, by an encoding apparatus, the method comprising:
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deriving a boundary of a deblocking filtering unit block which is a unit block for which deblocking filtering is performed in a reconstructed current picture; setting a boundary strength (bS) of a boundary of a bS setting unit block in the reconstructed current picture; and applying deblocking filtering on the boundary of the deblocking filtering unit block based on the bS, wherein the step of setting the bS includes setting a bS value for a target boundary which is an overlapped boundary of the bS setting unit block and the deblocking filtering unit block, wherein the step of applying the deblocking filtering includes determining whether the deblocking filtering is applied to a luma sample on the basis of the bS value and whether the deblocking filtering is applied to a chroma sample on the basis of the bS value, wherein the bS value is set as a value among 0, 1 and 2, wherein it is determined that the deblocking filtering is applied to the luma sample when the bS value is greater than a first threshold value which is 0, and it is determined that the deblocking filtering is applied to the chroma sample when the bS value is greater than a second threshold value which is 1, wherein when the bS value is equal to 1, the deblocking filtering is applied to the luma sample and the deblocking filtering is not applied to the chroma sample.
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17. A non-transitory computer-readable storage medium storing information on instructions causing a decoding apparatus to perform the following steps:
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deriving a boundary of a deblocking filtering unit block which is a unit block for which deblocking filtering is performed in a reconstructed current picture; setting a boundary strength (bS) of a boundary of a bS setting unit block in the reconstructed current picture; and applying deblocking filtering on the boundary of the deblocking filtering unit block based on the bS, wherein the step of setting the bS includes setting a bS value for a target boundary which is an overlapped boundary of the bS setting unit block and the deblocking filtering unit block, wherein the step of applying the deblocking filtering includes determining whether the deblocking filtering is applied to a luma sample on the basis of the bS value and whether the deblocking filtering is applied to a chroma sample on the basis of the bS value, wherein the bS value is set as a value among 0, 1 and 2, wherein it is determined that the deblocking filtering is applied to the luma sample when the bS value is greater than a first threshold value which is 0, and it is determined that the deblocking filtering is applied to the chroma sample when the bS value is greater than a second threshold value which is 1, wherein when the bS value is equal to 1, the deblocking filtering is applied to the luma sample and the deblocking filtering is not applied to the chroma sample.
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Specification