Image encoding/decoding method and device, and recording medium in which bitstream is stored

Patent metadata

Field	Value
Publication number	US-12477151-B2
Application number	US-202418778877-A
Country	US
Kind code	B2
Filing date	Jul 19, 2024
Priority date	Dec 31, 2018
Publication date	Nov 18, 2025
Grant date	Nov 18, 2025

Abstract

Disclosed herein is a method of decoding an image. The method includes generating an inter prediction block by performing inter prediction with respect to a current block, generating an intra prediction block by performing intra prediction with respect to the current block, determining a first weight and a second weight, and generating a final prediction block by respectively applying the first weight and the second weight to the inter prediction block and the intra prediction block. The generating of the intra prediction block includes generating the intra prediction block using a predefined intra prediction mode.

First claim

The invention claimed is:

1 . A method of decoding an image, the method comprising:
generating an inter prediction block by performing inter prediction with respect to a current block; generating an intra prediction block by performing intra prediction with respect to the current block; determining a first weight and a second weight; generating a final prediction block by respectively applying the first weight and the second weight to the inter prediction block and the intra prediction block; reconstructing transform coefficients from a bitstream; generating a residual block of the current block by inversely transforming the transform coefficients; and generating a reconstruction block of the current block based on the final prediction block and the residual block, wherein the generating of the intra prediction block includes generating the intra prediction block using a predefined intra prediction mode, wherein the determining of the first weight and the second weight includes determining the first weight and the second weight based on the number of neighbor blocks decoded in an intra prediction mode among a plurality of neighbor blocks adjacent to the current block, and wherein the plurality of neighbor blocks includes a left neighbor block adjacent to a left of the current block and a top neighbor block adjacent to a top of the current block.

2 . A method of encoding an image, the method comprising:
generating an inter prediction block by performing inter prediction with respect to a current block; generating an intra prediction block by performing intra prediction with respect to the current block; determining a first weight and a second weight; generating a final prediction block by respectively applying the first weight and the second weight to the inter prediction block and the intra prediction block; generating a residual block based on the final prediction block; generating transform coefficients by transforming the residual block; and encoding information on the transform coefficients, wherein the generating of the intra prediction block includes generating the intra prediction block using a predefined intra prediction mode, wherein the determining of the first weight and the second weight includes determining the first weight and the second weight based on the number of neighbor blocks decoded in an intra prediction mode among a plurality of neighbor blocks adjacent to the current block, and wherein the plurality of neighbor blocks includes a left neighbor block adjacent to a left of the current block and a top neighbor block adjacent to a top of the current block.

3 . A non-transitory computer-readable recording medium for storing a bitstream generated by an image encoding method, the image encoding method comprising:
generating an inter prediction block by performing inter prediction with respect to a current block; generating an intra prediction block by performing intra prediction with respect to the current block; determining a first weight and a second weight; generating a final prediction block by respectively applying the first weight and the second weight to the inter prediction block and the intra prediction block; generating a residual block based on the final prediction block; generating transform coefficients by transforming the residual block; and encoding information on the transform coefficients, wherein the generating of the intra prediction block includes generating the intra prediction block using a predefined intra prediction mode, wherein the determining of the first weight and the second weight includes determining the first weight and the second weight based on the number of neighbor blocks decoded in an intra prediction mode among a plurality of neighbor blocks adjacent to the current block, and wherein the plurality of neighbor blocks includes a left neighbor block adjacent to a left of the current block and a top neighbor block adjacent to a top of the current block.

Assignees

• Electronics & Telecommunications Res Inst
• Univ Sejong Ind Acad Coop Foud
• Chips&Media Inc
• Iucf Korea Aerospace Univ

Inventors

• Lim Sung Chang
• Kang Jung Won
• Lee Ha Hyun
• Lee Jin Ho
• Kim Hui Yong
• Lee Yung Lyul
• Jung Ji Yeon
• Kim Nam Uk
• Kim Myung Jun
• Kim Yang Woo
• Kim Dae Yeon
• Kim Jae Gon

Classifications

• H04N19/189

  characterised by the adaptation method, adaptation tool or adaptation type used for the adaptive coding · CPC title

• G06T9/004

  Predictors, e.g. intraframe, interframe coding · CPC title

• H04N19/503 Primary

  involving temporal prediction (adaptive coding with adaptive selection between spatial and temporal predictive coding H04N19/107; adaptive coding with adaptive selection among a plurality of temporal predictive coding modes H04N19/109) · CPC title

• H04N19/196

  being specially adapted for the computation of encoding parameters, e.g. by averaging previously computed encoding parameters (processing of motion vectors H04N19/513) · CPC title

• H04N19/176

  the region being a block, e.g. a macroblock · CPC title