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US 11,109,024 B2Granted
Decoder side intra mode derivation tool line memory harmonization with deblocking filter
AssigneeHuawei Technologies Co., Ltd.
InventorsAnand Meher Kotra, Shan Liu, Zhijie Zhao, Semih Esenlik, Han Gao
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Abstract
The present disclosure relates to image coding/decoding applying deblocking filtering and decoder-based intra-mode determination. In order to efficiently use software and/or hardware resources, the size of the template for the decoder-based intra-mode determination is smaller than the number of lines used by the deblocking filtering.
Claims20
An apparatus for processing coding blocks of an image comprising a processing circuitry configured to:
- perform deblocking filtering of a current coding block using a first number M of adjacent lines of pixels of a reconstructed coding block being a neighbor of the current coding block, and
- determine an intra-prediction mode to be used for the current coding block based on:
- a second number N of the adjacent lines of pixels, and
- a reference line of pixels in a reconstructed portion of the image, wherein the reference line of pixels is parallel and adjacent to the N adjacent lines, the adjacent lines of pixels are parallel to a border between the current coding block and the reconstructed coding block, and the adjacent lines of pixels include at least a line of pixels adjacent to the current coding block;
- wherein N is smaller than M when the border between the current coding block and the reconstructed coding block concurs with a border between coding tree blocks;
- or wherein N is equal to or larger than M when the border between the current coding block and the reconstructed coding block does not concur with a border between coding tree blocks.
3 more elements
A method for processing coding blocks of an image comprising the steps of:
- deblocking filtering of a current coding block using a first number M of adjacent lines of pixels of a reconstructed coding block being a neighbor of the current coding block, and
- determining an intra-prediction mode to be used for the current coding block based on:
- a second number N of the adjacent lines of pixels, and
- a reference line of pixels in a reconstructed portion of the image, wherein the reference line of pixels is parallel and adjacent to the N adjacent lines, the adjacent lines of pixels are parallel to a border between the current coding block and the reconstructed coding block, and the adjacent lines of pixels include at least a line of pixels adjacent to the current coding block;
- wherein N is smaller than M when the border between the current coding block and the reconstructed coding block concurs with a border between coding tree blocks;
- or wherein N is equal to or larger than M when the border between the current coding block and the reconstructed coding block does not concur with a border between coding tree blocks.
3 more elements
Dependencies are inferred from the claim text.