Method and apparatus for encoding/decoding image
AssigneeB1 Institute of Image Technology, Inc.
InventorKi Baek Kim
Life of this patent
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Abstract
The objective of the present invention is to provide a method and an apparatus for intra-prediction. In addition, the objective of the present invention is to provide a method and an apparatus for intra-prediction on a subblock unit basis. Furthermore, the objective of the present invention is to provide a method and an apparatus for determining a division and an encoding order of subblock units.
Claims4
An image decoding method performed by an image decoding apparatus, the method comprising:
- generating a prediction block of a coding block by performing intra prediction;
- generating a residual block of the coding block;
- and
- reconstructing the coding block based on the prediction block and the residual block,
- wherein the coding block is reconstructed by adding the prediction block and the residual block,
- wherein the performing intra prediction comprises interpolating reference samples,
- wherein one among fixed filtering or adaptive filtering is selectively performed according to an intra prediction mode for the coding block for the interpolating reference samples, and
- wherein the fixed filtering uses one interpolation filter pre-defined in the image decoding apparatus, and the adaptive filtering selectively uses one among a plurality of interpolation filters pre-defined in the image decoding apparatus.
An image encoding method performed by an image encoding apparatus, the method comprising:
- generating a prediction block of a coding block by performing intra prediction;
- generating a residual block of the coding block based on the prediction block;
- and
- encoding the coding block by encoding the residual block,
- wherein the residual block is generated by subtracting the prediction block from the coding block,
- wherein the performing intra prediction comprises interpolating reference samples,
- wherein one among fixed filtering or adaptive filtering is selectively performed according to an intra prediction mode for the coding block for the interpolating reference samples, and
- wherein the fixed filtering uses one interpolation filter pre-defined in the image encoding apparatus, and the adaptive filtering selectively uses one among a plurality of interpolation filters pre-defined in the image encoding apparatus.
A method of transmitting a bitstream, the method comprising:
- generating a prediction block of a coding block by performing intra prediction;
- generating a residual block of the coding block based on the prediction block;
- encoding, into the bitstream, the coding block by encoding the residual block;
- and
- transmitting the bitstream,
- wherein the residual block is generated by subtracting the prediction block from the coding block,
- wherein the performing intra prediction comprises interpolating reference samples,
- wherein one among fixed filtering or adaptive filtering is selectively performed according to an intra prediction mode for the coding block for the interpolating reference samples, and
- wherein the fixed filtering uses one interpolation filter pre-defined in the image encoding apparatus, and the adaptive filtering selectively uses one among a plurality of interpolation filters pre-defined in the image encoding apparatus.
Dependencies are inferred from the claim text.