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US 12,003,783 B2Granted
Adaptive loop filtering (ALF) for video coding
AssigneeTexas Instruments Incorporated
InventorsMadhukar Budagavi, Minhua Zhou
Life of this patent
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Abstract
A method for adaptive loop filtering of a reconstructed picture in a video encoder is provided that includes determining whether or not sample adaptive offset (SAO) filtering is applied to the reconstructed picture, and using adaptive loop filtering with no offset for the reconstructed picture when the SAO filtering is determined to be applied to the reconstructed picture.
Claims15
A method comprising:
- receiving, at a decoder, a bit stream that includes signal parameters and an adaptive loop filter (ALF) signal that selectively indicates no offset when sample adaptive offset (SAO) filtering was applied and failing to indicate no offset when SAO filtering was not applied, wherein the signal parameters are associated with a set of pixels in a region;
- in response to the ALF signal indicating no offset:
- decoding, by the decoder, the signal parameters to generate a set of coefficients;
- applying, by the decoder, ALF filtering on the set of pixels based on the set of coefficients to generate filtered data;
- and
- outputting, by the decoder, the filtered data.
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A decoder, comprising:
- entropy decoding component configured to receive a bit stream that includes signal parameters and an adaptive loop filter (ALF) signal that selectively indicates no offset when sample adaptive offset (SAO) filtering has been applied and fails to indicate no offset when SAO filtering was not applied, wherein the signal parameters are associated with a set of pixels in a region;
- and
- in response to the ALF signal indicating no offset:
- the entropy decoding component is further configured to decode the signal parameters to generate a set of coefficients;
- and
- an ALF component is configured to apply ALF filtering on the set of pixels based on the set of coefficients to generate filtered data.
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Dependencies are inferred from the claim text.