Image encoding/decoding method and device using filtering, and method for transmitting bitstream
AssigneeLG Electronics Inc.
InventorHyeong Moon Jang
Life of this patent
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Abstract
An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may comprise deriving a reconstructed block for a current block, deriving a target boundary for the reconstructed block, determining a filter length of a deblocking filter to be applied for the target boundary, and applying the deblocking filter for the target boundary based on the determined filter length. The filter length may be determined based on at least one of a width or height of a transform block adjacent to the target boundary.
Claims8
An image decoding method performed by an image decoding apparatus, the image decoding method comprising:
- deriving a target boundary of a deblocking filter in a reconstructed picture;
- determining a maximum length of the deblocking filter for the target boundary;
- and
- applying the deblocking filter for the target boundary based on the maximum length;
- wherein, based on the target boundary being a vertical boundary;
- the maximum length is determined based on a width of at least one of a first block adjacent to a left side of the target boundary or a second block adjacent to a right side of the target boundary,
- the maximum length comprises a first maximum length at a first block side and a second maximum length at a second block side, and
- based on a width of the first block being equal to or less than 4, the first maximum length and the second maximum length are determined to be 1, and
- wherein, based on the target boundary being a horizontal boundary, the maximum length is determined based on a height of at least one of a third block adjacent to an upper side of the target boundary or a fourth block adjacent to a lower side of the target boundary.
An image encoding method performed by an image encoding apparatus, the image encoding method comprising:
- deriving a target boundary of a deblocking filter in a reconstructed picture;
- determining a maximum length of the deblocking filter for the target boundary;
- and
- applying the deblocking filter for the target boundary based on the maximum length,
- wherein, based on the target boundary being a vertical boundary;
- the maximum length is determined based on a width of at least one of a first block adjacent to a left side of the target boundary or a second block adjacent to a right side of the target boundary,
- the maximum length comprises a first maximum length at a first block side and a second maximum length at a second block side, and
- based on a width of the first block being equal to or less than 4, the first maximum length and the second maximum length are determined to be 1, and
- wherein, based on the target boundary being a horizontal boundary, the maximum length is determined based on a height of at least one of a third block adjacent to an upper side of the target boundary or a fourth block adjacent to a lower side of the target boundary.
A non-transitory computer-readable recording medium storing a bitstream generated by an image encoding method, the image encoding method comprising:
- deriving a target boundary of a deblocking filter in a reconstructed picture;
- determining a maximum length of the deblocking filter for the target boundary;
- and
- applying the deblocking filter for the target boundary based on the maximum length,
- wherein, based on the target boundary being a vertical boundary;
- the maximum length is determined based on a width of at least one of a first block adjacent to a left side of the target boundary or a second block adjacent to a right side of the target boundary,
- the maximum length comprises a first maximum length at a first block side and a second maximum length at a second block side, and
- based on a width of the first block being equal to or less than 4, the first maximum length and the second maximum length are determined to be 1, and
- wherein, based on the target boundary being a horizontal boundary, the maximum length is determined based on a height of at least one of a third block adjacent to an upper side of the target boundary or a fourth block adjacent to a lower side of the target boundary.
Dependencies are inferred from the claim text.