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US 12,756,868 B2Granted
Fusion mode for adaptive loop filter in video coding
AssigneesBeijing Bytedance Network Technology Co., Ltd., Bytedance Inc.
InventorsWenbin Yin, Kai Zhang, Li Zhang
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Abstract
A method of processing media data. The method includes applying a fusion mode to an in-loop filtering method, a pre-processing method, or a post-processing method to filter a video unit in video coding; and performing a conversion between a video including the video unit and a bitstream of the video based on the fusion mode used. A corresponding video coding apparatus and non-transitory computer-readable recording medium are also disclosed.
Claims19
A method for processing video data, comprising:
- applying, during a conversion between a video comprising a video unit and a bitstream of the video, a fusion mode to an in-loop filtering method, a pre-processing method, or a post-processing method to filter the video unit;
- and
- performing the conversion based on the fusion mode applied,
- wherein a plurality of filters are configured to filter the video unit in the fusion mode to produce a final filtering result of the video unit, wherein the video unit comprises a sample in an ALF processing unit, and wherein the fusion mode is an ALF fusion mode,
- wherein a virtual filter of the fusion mode is fused by M filters, and wherein coefficients are formulated as:
- C
- A
-
- 0
- =
- W
- 10
-
- C
- 10
- +
- W
- 2
-
- 0
-
- C
- 2
-
- 0
- +
- …
- +
- W
- M
-
- 0
-
- C
- M
-
- 0
- C
- A
-
- 1
- =
- W
- 1
-
- 1
-
- C
- 1
-
- 1
- +
- W
- 2
-
- 1
-
- C
- 2
-
- 1
- +
- …
- +
- W
- M
-
- 1
-
- C
- M
-
- 1
- C
- A
-
- i
- =
- W
- 1
-
- i
-
- C
- 1
-
- i
- +
- W
- 2
-
- i
-
- C
- 2
-
- i
- +
- …
- +
- W
- M
-
- i
-
- C
- M
-
- i
- …
- C
- A
-
- N
- =
- W
- 1
-
- N
-
- C
- 1
-
- N
- +
- W
- 2
-
- N
-
- C
- 2
-
- N
- +
- …
- +
- W
- M
-
- N
-
- C
- M
-
- N
- where W1. . . WM denote identical indications of the function parameters, where CAi denotes a generated coefficient, where N denotes a greatest number of the filter coefficients derived, included in the bitstream, used, or pre-defined among the filters selected by the fusion mode, where i denotes a coefficient position.
144 more elements
An apparatus for processing video data, comprising:
- a processor;
- and
- a non-transitory memory with instructions thereon, wherein the instructions upon execution by the processor, cause the processor to:
- apply, during a conversion between a video comprising a video unit and a bitstream of the video, a fusion mode to an in-loop filtering method, a pre-processing method, or a post-processing method to filter the video unit;
- and
- perform the conversion based on the fusion mode applied,
- wherein a plurality of filters are configured to filter the video unit in the fusion mode to produce a final filtering result of the video unit, wherein the video unit comprises a sample in an ALF processing unit, and wherein the fusion mode is an ALF fusion mode,
- wherein a virtual filter of the fusion mode is fused by M filters, and wherein coefficients are formulated as:
- C
- A
-
- 0
- =
- W
- 10
-
- C
- 10
- +
- W
- 2
-
- 0
-
- C
- 2
-
- 0
- +
- …
- +
- W
- M
-
- 0
-
- C
- M
-
- 0
- C
- A
-
- 1
- =
- W
- 1
-
- 1
-
- C
- 1
-
- 1
- +
- W
- 2
-
- 1
-
- C
- 2
-
- 1
- +
- …
- +
- W
- M
-
- 1
-
- C
- M
-
- 1
- C
- A
-
- i
- =
- W
- 1
-
- i
-
- C
- 1
-
- i
- +
- W
- 2
-
- i
-
- C
- 2
-
- i
- +
- …
- +
- W
- M
-
- i
-
- C
- M
-
- i
- …
- C
- A
-
- N
- =
- W
- 1
-
- N
-
- C
- 1
-
- N
- +
- W
- 2
-
- N
-
- C
- 2
-
- N
- +
- …
- +
- W
- M
-
- N
-
- C
- M
-
- N
- where W1. . . WM denote identical indications of the function parameters, where CAi denotes a generated coefficient, where N denotes a greatest number of the filter coefficients derived, included in the bitstream, used, or pre-defined among the filters selected by the fusion mode, where i denotes a coefficient position.
147 more elements
A non-transitory computer-readable recording medium storing a bitstream of a video which is generated by a method performed by a video processing apparatus, wherein the method comprises:
- applying, for a video comprising a video unit, a fusion mode to an in-loop filtering method, a pre-processing method, or a post-processing method to filter the video unit;
- and
- generating the bitstream based on the fusion mode applied,
- wherein a plurality of filters are configured to filter the video unit in the fusion mode to produce a final filtering result of the video unit, wherein the video unit comprises a sample in an ALF processing unit, and wherein the fusion mode is an ALF fusion mode,
- wherein a virtual filter of the fusion mode is fused by M filters, and wherein coefficients are formulated as:
- C
- A
-
- 0
- =
- W
- 10
-
- C
- 10
- +
- W
- 2
-
- 0
-
- C
- 2
-
- 0
- +
- …
- +
- W
- M
-
- 0
-
- C
- M
-
- 0
- C
- A
-
- 1
- =
- W
- 1
-
- 1
-
- C
- 1
-
- 1
- +
- W
- 2
-
- 1
-
- C
- 2
-
- 1
- +
- …
- +
- W
- M
-
- 1
-
- C
- M
-
- 1
- C
- A
-
- i
- =
- W
- 1
-
- i
-
- C
- 1
-
- i
- +
- W
- 2
-
- i
-
- C
- 2
-
- i
- +
- …
- +
- W
- M
-
- i
-
- C
- M
-
- i
- …
- C
- A
-
- N
- =
- W
- 1
-
- N
-
- C
- 1
-
- N
- +
- W
- 2
-
- N
-
- C
- 2
-
- N
- +
- …
- +
- W
- M
-
- N
-
- C
- M
-
- N
- where W1. . . WM denote identical indications of the function parameters, where CAi denotes a generated coefficient, where N denotes a greatest number of the filter coefficients derived, included in the bitstream, used, or pre-defined among the filters selected by the fusion mode, where i denotes a coefficient position.
144 more elements
Dependencies are inferred from the claim text.