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US 12,003,713 B2Granted
Image encoding/decoding method and apparatus using sample filtering
AssigneeIntellectual Discovery Co., Ltd.
InventorsJin Ho Lee, Jung Won Kang, Ha Hyun Lee, Sung Chang Lim, Hui Yong Kim
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Abstract
There is provided an image encoding/decoding method and apparatus. The image encoding method of the present invention includes: determining whether or not to apply filtering to a filtering target sample; determining a filter type on the basis of the determination; and applying filtering to the filtering target sample by using the determined filter type.
Claims4
A video decoding method comprising:
- determining a prediction sample of a current block based on an intra prediction mode of the current block;
- determining whether to filter the prediction sample of the current block;
- and
- in response that the prediction sample is determined to be filtered, filtering the prediction sample of the current block based on a position of the prediction sample,
- wherein whether to filter the prediction sample of the current block is determined based on a reference line index indicating a reference line referenced by the current block among at least one reference line near the current block,
- wherein the reference line index is set to 0 to indicate a first reference line immediately adjacent to the current block,
- wherein the prediction sample of the current block is determined not to be filtered when the reference line index does not indicate the first reference line immediately adjacent to the current block,
- wherein the prediction sample of the current block is filtered based on a weighted sum of the prediction sample and at least one reference sample of the prediction sample, and the at least one reference sample is determined based on a position of the prediction sample,
- wherein the weighted sum is calculated by using weights that are applied to the prediction sample and the at least one reference sample, and
- wherein a weight for a reference sample among the at least one reference sample decreases and a weight for the prediction sample increases as a distance between the prediction sample and the reference sample increases.
7 more elements
A video encoding method comprising:
- determining a prediction sample of a current block based on an intra prediction mode of the current block;
- determining whether to filter the prediction sample of the current block;
- and
- in response that the prediction sample is determined to be filtered, filtering the prediction sample of the current block based on a position of the prediction sample,
- wherein whether to filter the prediction sample of the current block is determined based on a reference line index indicating a reference line referenced by the current block among at least one reference line near the current block,
- wherein the reference line index is set to 0 to indicate a first reference line immediately adjacent to the current block,
- wherein the prediction sample of the current block is determined not to be filtered when the reference line index does not indicate the first reference line immediately adjacent to the current block,
- wherein the prediction sample of the current block is filtered based on a weighted sum of the prediction sample and at least one reference sample of the prediction sample, and the at least one reference sample is determined based on a position of the prediction sample,
- wherein the weighted sum is calculated by using weights that are applied to the prediction sample and the at least one reference sample, and
- wherein a weight for a reference sample among the at least one reference sample decreases and a weight for the prediction sample increases as a distance between the prediction sample and the reference sample increases.
7 more elements
A non-transitory computer readable recording medium storing a bitstream which is generated by using an image encoding method, wherein the image encoding method comprises:
- determining a prediction sample of a current block based on an intra prediction mode of the current block;
- determining whether to filter the prediction sample of the current block;
- and
- in response that the prediction sample is determined to be filtered, filtering the prediction sample of the current block based on a position of the prediction sample,
- wherein whether to filter the prediction sample of the current block is determined based on a reference line index indicating a reference line referenced by the current block among at least one reference line near the current block,
- wherein the reference line index is set to 0 to indicate a first reference line immediately adjacent to the current block,
- wherein the prediction sample of the current block is determined not to be filtered when the reference line index does not indicate the first reference line immediately adjacent to the current block,
- wherein the prediction sample of the current block is filtered based on a weighted sum of the prediction sample and at least one reference sample of the prediction sample, and the at least one reference sample is determined based on a position of the prediction sample,
- wherein the weighted sum is calculated by using weights that are applied to the prediction sample and the at least one reference sample, and
- wherein a weight for a reference sample among the at least one reference sample decreases and a weight for the prediction sample increases as a distance between the prediction sample and the reference sample increases.
7 more elements
Dependencies are inferred from the claim text.