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US 11,388,395 B2Granted
Method and device for processing video signal
AssigneeKt Corporation
InventorBae Keun Lee
Life of this patent
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Abstract
A method for decoding a video according to the present invention, may comprise determining whether bi-directional intra prediction is applied to a current block, deriving a reference sample of the current block, and when the bi-directional intra prediction is applied to the current block, based on a first reference sample and a second reference sample specified by an intra prediction mode of the current block, obtaining a prediction sample of the current block.
Claims10
A method of decoding an image with a decoding apparatus, comprising:
- determining an intra prediction mode of a current block in the image from intra prediction modes pre-defined in the decoding apparatus;
- deriving reference samples for intra prediction of the current block;
- generating a prediction block of the current block by performing the intra prediction for the current block based on the reference samples,
- wherein the reference samples include at least one of a top reference sample adjacent to the current block, a left reference sample adjacent to the current block, or a right reference sample adjacent to the current block,
- wherein the method further comprises:
- determining whether to apply a modification process to the current block or not,
- wherein whether to apply the modification process to the current block or not is implicitly determined by comparing a size of the current block with a threshold value, and
- wherein in response to the determination that the modification process is applied to the current block, prediction samples of a first region in the current block are output through a modification using at least one reference sample, and prediction samples of a second region in the current block are output without the modification.
5 more elements
A method of encoding an image with an encoding apparatus, comprising:
- obtaining a prediction block of a current block in the image by using reference samples;
- obtaining a residual block of the current block based on an original block of the current block and the prediction block;
- and
- encoding the residual block to generate a bitstream, wherein an intra prediction mode of the current block is determined from intra prediction modes pre-defined in the encoding apparatus,
- wherein the reference samples include at least one of a top reference sample adjacent to the current block, a left reference sample adjacent to the current block, or a right reference sample adjacent to the current block,
- wherein the method further comprises:
- determining whether to apply a modification process to the current block or not,
- wherein whether to apply the modification process to the current block or not is implicitly determined by comparing a size of the current block with a threshold value, and
- wherein in response to the determination that the modification process is applied to the current block, prediction samples of a first region in the current block are output through a modification using at least one reference sample, and prediction samples of a second region in the current block are output without the modification.
6 more elements
A non-transitory computer readable medium having stored thereon a compressed video data, the compressed video data comprising:
- residual coefficients of a current block,
- wherein the residual coefficients are generated based on a prediction block of the current block and an original block of the current block,
- wherein the prediction block is generated based on an intra prediction mode of the current block and reference samples, the intra prediction mode of the current block being determined from intra prediction modes pre-defined in an encoding apparatus,
- wherein the reference samples include at least one of a top reference sample adjacent to the current block, a left reference sample adjacent to the current block, or a right reference sample adjacent to the current block,
- wherein in response to application of a modification process to the current block, prediction samples of a first region in the current block are output through a modification using at least one reference sample, and prediction samples of a second region in the current block are output without the modification, and
- wherein whether to apply the modification process to the current block or not is determined by comparing a size of the current block with a threshold value.
3 more elements
Dependencies are inferred from the claim text.