Intra-prediction mode-based image processing method and device therefor
AssigneeLG Electronics Inc.
InventorsHyeongmoon Jang, Junghak Nam, Jaehyun Lim, Jin Heo
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Abstract
Disclosed are an intra-prediction mode-based image processing method and a device therefor. Particularly, a method for processing an image on the basis of an intra-prediction mode may comprise the steps of: configuring a reference sample to be used for prediction of a current block on the basis of width information and height information of the current block when the current block is a non-square block; deriving an intra-prediction mode of the current block; and generating a prediction sample of the current block by using the reference sample on the basis of the intra-prediction mode of the current block.
Claims9
A method of decoding a video signal, comprising:
- deriving an intra prediction mode of a current block;
- generating reference samples based on a width and a height of the current block;
- generating prediction samples of the current block using the reference samples based on the intra prediction mode of the current block;
- and
- generating reconstructed samples of the current block based on the prediction samples of the current block,
- wherein, based on the current block being a non-square block, a first intra prediction mode is used as the intra prediction mode of the current block, instead of a second intra prediction mode covering a specific angle range in a plurality of intra prediction modes, and
- wherein the second intra prediction mode is determined based on a ratio of the width and height of the current block.
A method of encoding a video signal, comprising:
- deriving an intra prediction mode of a current block;
- generating reference samples based on a width and a height of the current block;
- generating prediction samples of the current block using the reference samples based on the intra prediction mode of the current block;
- and
- generating residual samples of the current block based on the prediction samples of the current block,
- wherein, based on the current block being a non-square block, a first intra prediction mode is used as the intra prediction mode of the current block, instead of a second intra prediction mode covering a specific angle range in a plurality of intra prediction modes, and
- wherein the second intra prediction mode is determined based on a ratio of the width and height of the current block.
A transmission method for data comprising a bitstream including an image by an apparatus, the method comprising:
- obtaining the bitstream for the image;
- and
- transmitting the data comprising the bitstream,
- wherein the bitstream is generated by performing the steps of:
- deriving an intra prediction mode of a current block;
- generating reference samples based on a width and a height of the current block;
- generating prediction samples of the current block using the reference samples based on the intra prediction mode of the current block;
- and
- generating residual samples of the current block based on the prediction samples of the current block,
- wherein, based on the current block being a non-square block, a first intra prediction mode is used as the intra prediction mode of the current block, instead of a second intra prediction mode covering a specific angle range in a plurality of intra prediction modes, and
- wherein the second intra prediction mode is determined based on a ratio of the width and height of the current block.
Dependencies are inferred from the claim text.