Title:
IMAGE ENCODING/DECODING METHOD AND APPARATUS USING QUANTIZATION MATRIX, AND METHOD FOR TRANSMITTING BITSTREAM
Document Type and Number:
WIPO Patent Application WO/2021/060846
Kind Code:
A1
Abstract:
Provided are an image encoding/decoding method and apparatus. The image decoding method according to the present disclosure comprises the steps of: obtaining quantization mode information for a current block from a bitstream; determining whether a quantization matrix for the current block is configured from a reference quantization matrix on the basis of the quantization mode information; and configuring the quantization matrix for the current block on the basis of a result of the determination, wherein, when the quantization matrix for the current block is configured from the reference quantization matrix, the quantization matrix for the current block is configured on the basis of identification information of the reference quantization matrix, when the quantization matrix for the current block is not configured from the reference quantization matrix, the quantization matrix for the current block is configured on the basis of a value of a quantization matrix obtained from the bitstream, and when the current block is an intra-predicted chroma block, the quantization matrix for the current block is configurable only when the size of the current block is greater than 2x2.
Inventors:
JANG HYEONG MOON (KR)
KIM SEUNG HWAN (KR)
KIM SEUNG HWAN (KR)
Application Number:
PCT/KR2020/012901
Publication Date:
April 01, 2021
Filing Date:
September 23, 2020
Export Citation:
Assignee:
LG ELECTRONICS INC (KR)
International Classes:
H04N19/124; H04N19/105; H04N19/122; H04N19/176; H04N19/186; H04N19/70
Foreign References:
| KR20180078212A | 2018-07-09 | |||
| KR20180068919A | 2018-06-22 | |||
| KR20140088100A | 2014-07-09 | |||
| JP2016131384A | 2016-07-21 | |||
| JP2014060713A | 2014-04-03 |
Attorney, Agent or Firm:
SUNG, Byung Kee (KR)
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