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US 2019/0158886 A1Published application
Low complex deblocking filter decisions
AssigneeSun Patent Trust
InventorsMatthias NARROSCHKE, Semih ESENLIK, Thomas WEDI
Life of this patent
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Abstract
The present disclosure relates to deblocking filtering, which may be advantageously applied for block-wise encoding and decoding of images or video signals. In particular, the present disclosure relates to an improved memory management in an automated decision on whether to apply or skip deblocking filtering for a block and to selection of the deblocking filter. The decision is performed on the basis of a segmentation of blocks in such a manner that memory usage is optimized. Preferably, the selection of appropriate deblocking filters is improved so as to reduce computational expense.
Claims8
A decoding device decoding blocks of a frame, comprising:
- a processor;
- and
- a memory coupled to the processor;
- wherein the processor performs the following:
- dividing each of a first block and a second block that are separated by a first boundary into at least two groups of pixels along a line that is perpendicular to said first boundary, the first block and the second block being included in the frame;
- first judging whether or not to apply a deblocking filter to pixels adjacent to the first boundary of the first block and the second block;
- first selecting a first deblocking filter for deblocking pixels adjacent to the first boundary;
- second judging whether or not to apply a deblocking filter to pixels adjacent to a second boundary, the second boundary being a boundary between a third block and one of the first block and the second block and perpendicular to the first boundary, the third block being different from the first block and the second block;
- and
- second selecting a second deblocking filter for deblocking pixels adjacent to the second boundary,
- wherein
- in the first judging, only the pixels included in a first group of pixels in the first block and a second group of pixels in the second block are used, the first group of pixels and the second group of pixels being adjacent to the first boundary.
9 more elements
A coding device coding blocks of a frame, comprising:
- a processor;
- and
- a memory coupled to the processor;
- wherein the processor performs the following:
- dividing each of a first block and a second block that are separated by a first boundary into at least two groups of pixels along a line that is perpendicular to said first boundary, the first block and the second block being included in the frame;
- first judging whether or not to apply a deblocking filter to pixels adjacent to the first boundary of the first block and the second block;
- first selecting a first deblocking filter for deblocking pixels adjacent to the first boundary;
- second judging whether or not to apply a deblocking filter to pixels adjacent to a second boundary, the second boundary being a boundary between a third block and one of the first block and the second block and perpendicular to the first boundary, the third block being different from the first block and the second block;
- and
- second selecting a second deblocking filter for deblocking pixels adjacent to the second boundary,
- wherein
- in the first judging, only the pixels included in a first group of pixels in the first block and a second group of pixels in the second block are used, the first group of pixels and the second group of pixels being adjacent to the first boundary.
9 more elements
A decoding method for deblocking filtering of image blocks of pixels, comprising the steps of:
- dividing each of a first block and a second block that are separated by a first boundary into at least two groups of pixels along a line that is perpendicular to said first boundary, the first block and the second block being included in the frame;
- first judging whether or not to apply a deblocking filter to pixels adjacent to the first boundary of the first block and the second block;
- first selecting a first deblocking filter for deblocking pixels adjacent to the first boundary;
- second judging whether or not to apply a deblocking filter to pixels adjacent to a second boundary, the second boundary being a boundary between a third block and one of the first block and the second block and perpendicular to the first boundary, the third block being different from the first block and the second block;
- and
- second selecting a second deblocking filter for deblocking pixels adjacent to the second boundary,
- wherein
- in the first judging, only the pixels included in a first group of pixels in the first block and a second group of pixels in the second block are used, the first group of pixels and the second group of pixels being adjacent to the first boundary.
5 more elements
A coding method for deblocking filtering of image blocks of pixels, comprising the steps of:
- dividing each of a first block and a second block that are separated by a first boundary into at least two groups of pixels along a line that is perpendicular to said first boundary, the first block and the second block being included in the frame;
- first judging whether or not to apply a deblocking filter to pixels adjacent to the first boundary of the first block and the second block;
- first selecting a first deblocking filter for deblocking pixels adjacent to the first boundary;
- second judging whether or not to apply a deblocking filter to pixels adjacent to a second boundary, the second boundary being a boundary between a third block and one of the first block and the second block and perpendicular to the first boundary, the third block being different from the first block and the second block;
- and
- second selecting a second deblocking filter for deblocking pixels adjacent to the second boundary,
- wherein
- in the first judging, only the pixels included in a first group of pixels in the first block and a second group of pixels in the second block are used, the first group of pixels and the second group of pixels being adjacent to the first boundary.
5 more elements
Dependencies are inferred from the claim text.